JP5363223B2 - Work support device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a workpiece support device capable of rotatably and axially movably supporting a round pipe or a square pipe, handling different pipes without changing parts, and inputting the pipe from above. <P>SOLUTION: A first conveying roller device 33 and a second conveying roller device 34 are disposed in an arrangement sandwiching the pipe as a workpiece and in an approximately V-shape in a state having an opened upper side. A third conveying roller device 35 is disposed at a lower side of the pipe supported in a state sandwiched between the first conveying roller device 33 and the second conveying roller device 34 in an arrangement approximately crossing both of the first conveying roller device 33 and the second conveying roller device 34. The first conveying roller device 33, the second conveying roller device 34, and the third conveying roller device 35 are disposed so as to respectively contact the outermost peripheral surface of a rotational trajectory when the pipe to be supported rotate around the axis center. Adjusting the position of the third conveying roller device 35 can deal with pipes having different diameters. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

INDUSTRIAL APPLICABILITY The present invention is used in a pipe processing machine or the like that processes a pipe as a long workpiece (workpiece), supports the workpiece during processing, and can also support loading and unloading of the workpiece. to the round pipe only polygonal tubular square pipes not relate to suitably usable work supporting equipment.

  Conventionally, a rotation support member that supports a pipe (workpiece) to be processed so as to be rotatable around an axis, a support member that rotatably supports the pipe facing the rotation support member, and a laser for cutting the pipe 2. Description of the Related Art A laser processing apparatus for processing a pipe provided with a processing head is known (for example, see Patent Documents 1 and 2).

In the pipe processing machine as the laser processing apparatus, the pipe can be cut into an arbitrary shape by moving the laser processing head (cutting torch) along at least the axial direction of the pipe and rotating the pipe. The cutting includes not only cutting a single pipe into a plurality of pipes but also drilling a hole having an arbitrary shape in the pipe.
Note that the support members in Patent Documents 1 and 2 are basically disposed between two rotating bodies, each having a disk shape or a short cylindrical shape arranged in parallel on the left and right sides with the rotation axis direction being parallel. By arranging the round pipes in contact with each other, the round pipes in which the rotation axis direction and the axial direction of these rotary bodies are parallel to each other are rotatably supported.

Further, there is known a transport roller device that includes a roller that is used for transporting the above-described pipe and has both ends attached to the outer periphery of a shaft supported by a bearing.
The transport roller device is configured to transport an object to be transported by a single roller or a plurality of rollers.
In the above-described transport roller, since the roller comes into contact with the object to be transported, depending on the situation, the roller may become dirty, worn out, or damaged. From the shaft for cleaning or replacement of the roller, etc. The roller needs to be removed.

Furthermore, in order to transport a delicate workpiece that is easily damaged, etc., as the object to be transported, if a soft material that easily wears out is used as the roller, it is necessary to replace the roller in a short period of time. .
In addition, when a transported object of a delicate material is transported as described above and a transported object of a material that is not easily damaged is transported by one transport roller device, both are soft materials. However, it is preferable to use different rollers for materials that are easily damaged and materials that are not easily damaged. The roller will be replaced.

  Here, the transport roller device shown in FIGS. 8 and 9 has a frame-shaped housing 2 in which the bearing units 1 are attached to the left and right ends, and both ends are rotatably supported by the bearing units 1 inside the housing 2. And a cylindrical roller 4 disposed on the outer periphery of the shaft 3 in a state where the shaft 3 is inserted.

The housing 2 includes support plates 5 at both left and right ends to which the bearing unit 1 is attached, and a pair of side plates 6 that connect the support plates 5 with a space therebetween.
The bearing unit 1 has a flange portion fastened to the outer surface side of the support plate 5 of the housing 2 by two bolts 7 with holes. Further, both end portions of the shaft 3 penetrate the support plate 5 of the housing 2. Support shafts (not shown) at both ends of the shaft 3 are inserted into shaft insertion portions (not shown) of the inner ring portion of the bearing unit 1 fixed to the outer surface of the support plate 5 and connected to the inner rings. Further, the support shaft of the shaft 3 is fixed to the inner ring of the bearing unit 1 by a bolt 8 with a hole screwed into the screw hole of the support shaft of the shaft 3 from the outside of the bearing unit 1.

The shaft 3 is inserted into the roller 4. That is, the roller 4 is extrapolated to the shaft 3.
An opening through which the roller 4 can be inserted is formed in the support plate 5 of the housing 2, and both end portions of the roller 4 are in a state where the left and right positions are restricted by the inner surface of the bearing unit 1.

  In such a transport roller device, when the roller 4 is replaced, for example, the holed bolt 8 that fixes the support shaft of the shaft 3 to the bearing unit 1 is loosened with a tool such as a wrench that fits into the hole. The two bolts 7 with holes that fasten the bearing unit 1 to the support plate 5 of the housing 2 are loosened and removed with a tool such as a wrench that fits into the holes. When the holed bolt 8 is rotated with a tool, the shaft 3 and the roller 4 screwed into the holed bolt 8 are rotated. Therefore, a tool such as a wrench is formed in the hole formed in the shaft 3 and the roller 4. It is necessary to stop the rotation of the shaft 3 and the roller 4.

Then, the bearing unit 1 is removed from the housing 2. The roller 4 is removed from the shaft 3 and the housing 2 by pulling out the roller 4 from the opening of the support plate 5 of the housing 2.
Next, a new roller 4 is attached by a procedure reverse to the above-described removal procedure, and the removed bearing unit 1 is attached to the shaft 3 and the housing 2.

  With the roller replacement method as described above, it takes time and effort to turn the bolt with a tool when removing and installing the bolt, and there are several different bolts when it is removed. It takes a lot of time to store temporarily so as not to. In particular, when there are a large number of rollers and they are exchanged all at once, there are a plurality of different bolts, so that these bolts can be removed (loosening) and attached (tightening), and the bolts between them. It takes time and effort to temporarily store such parts.

Therefore, for example, a roller auxiliary tool (corresponding to the roller 4 described above) constituting the outer peripheral portion of the roller is attached to the outer peripheral surface of the roller (corresponding to the shaft 3 described above). The thing which can change the shape and material of the outer peripheral part of a roller is proposed (for example, refer patent document 3).
The auxiliary tool has a shape obtained by cutting a cylindrical member into two parts by cutting along a plane including the axis, and fastening the two semi-cylindrical members on the roller, Auxiliary tools can be attached. Moreover, it can be removed from the roller by dividing the auxiliary tool.

Japanese Patent No. 3378070 Japanese Patent No. 3640709 Japanese Patent Laid-Open No. 04-169461

By the way, when the amount of movement of the laser processing head of the pipe processing machine in the pipe axial direction is shorter than the length of the pipe and it is necessary to perform processing over substantially the entire length of the pipe, the pipe supported rotatably. It is necessary to repeat the cutting process while changing the position of the pipe along the axial direction.
In this case, depending on the length of the pipe, the pipe may protrude greatly from the moving range of the laser processing head, but the protruding portion of the pipe is supported rotatably and supported to be movable in the axial direction. There is a need to.

According to the supporting device in which the two rollers described in Patent Documents 1 and 2 are arranged side by side in parallel with the rotation axis direction, the round pipe is supported rotatably and is slid in the axial direction of the roller. It can be moved.
However, a square pipe with a polygonal cross section cannot be supported smoothly and freely. For example, when the corner portion of the pipe falls between two rotating bodies, the rotation of the square pipe is hindered. And the position of the axis of the square pipe may be lowered.

Also, as a similar structure for supporting cylindrical or columnar workpieces such as round pipes, a workpiece support structure of a centerless grinding machine is known, which is also rotatable and axially movable by two rotating bodies, etc. However, it is difficult to support the square pipe so as to be rotatable and movable in the axial direction in the same manner as the support members of Patent Documents 1 and 2 described above.
In addition, as described above, a configuration in which the square pipe protruding from the pipe processing machine is supported by a roller or table whose vertical position (height) can be adjusted is conceivable, but the square pipe rotates on the roller or table. In this case, the rotating shaft is shaken by the moment of inertia that changes every time it rotates and the axial position of the shaft moves up and down, and if the protruding length of the square pipe from the pipe processing machine is long, the amplitude of the square pipe increases. Processing becomes difficult.

  Therefore, in the case of a square pipe, for example, it is necessary to use a rotating jig made of a rotating body that can have the axis of the square pipe as the center of rotation. The rotating jig includes a hole into which the square pipe can be inserted, and an adjusting unit that aligns the center of the square pipe inserted into the hole with the rotation center of the rotating tool. The rotating jig is set on the platform so as to be highly adjustable and rotatable, for example. In addition, the square pipe needs to be movable in the axial direction as described above, and the rotating jig is not in a state in which the square pipe of the square pipe is fastened and fixed, but in a state in which the center position is adjusted. However, it is preferable to be able to move in the axial direction.

If such a rotating jig is used, a square pipe can be processed with the above-described pipe processing machine, but it takes time and money to manufacture the rotating jig, and there are a number of pipes according to the shape (type) of the pipe. Since there exists a possibility that a rotation jig may be required, the manufacturing cost of a workpiece | work support apparatus will become high.
In addition, when a large number of rotating jigs are required according to the type of pipe, the rotating jigs need to be managed, and the work becomes complicated.
Further, it takes time to set the pipe inserted into the rotating jig during pipe processing and to align the axis of the pipe, which may reduce the production efficiency.
Further, when the rotating jig rotates together with the pipe, the inertia of the rotating shaft acts on the pipe, and the pipe is twisted, which may cause a reduction in processing accuracy.

Some pipe processing machines are known to support both ends of a long pipe and allow the pipe to move in the axial direction. In such a pipe processing machine, The pipe can be centered when it is supported at both ends, and automatic operation from loading to unloading is possible.
However, such a dedicated machine for pipe processing requires, for example, a length larger than twice the length of the pipe in the axial direction of the pipe and requires a large installation area. Moreover, it becomes an expensive machine by setting it as the above structures.

  Further, in the above-described transport roller device, in the case where two semi-cylindrical auxiliary tools are attached to the outer peripheral portion of the roller, the auxiliary tools are arranged with the rollers sandwiched between the two semi-cylindrical auxiliary tools. Since it is necessary to make it into a cylindrical shape and fasten with a tightening screw, workability is poor, and when changing the shape and material of a large number of rollers, labor and time have not been sufficiently reduced.

The present invention has been made in view of the above circumstances, and can support not only round pipes but also square pipes so that they can rotate and move in the axial direction, and can support different types and shapes of pipes without replacement of parts. in further aims at providing a work supporting equipment that enables loading and unloading of the pipe from above.

In order to solve the above-described problem, the work support device according to claim 1 is a work support device that supports a long work such as a pipe so as to be rotatable and movable in an axial direction. The first support member, the second support member, and the third support member, in which the contact portions that come into contact with each other are linearly or strip-shaped substantially parallel to the direction orthogonal to the axial direction of the workpiece, the first support member, A height adjusting means for adjusting the height of the second support member and the third support member, the contact portion of the first support member and the contact portion of the second support member are arranged to sandwich the workpiece and the upper side is open The first support member is arranged in a generally V-shaped configuration, and the contact portion of the third support member substantially intersects both the contact portion of the first support member and the contact portion of the second support member. And the word supported between the second support members. Disposed on the lower side of the first support member, the contact portion of the second support member, and the contact portion of the third support member are supported by the contact portions of the third support member, respectively. so that placement in contact with the outer peripheral surface, the first support member, the position adjusting means for adjusting the position of at least a third support member of the second support member and the third support member is provided, said position adjusting means A rotation support means for rotatably supporting the third support member around the outside of the region sandwiched between the contact portion of the first support member and the contact portion of the second support member, and rotation of the third support member And holding means for holding the third support member at a rotation angle at which the contact portion of the third support member is brought into contact with the outermost peripheral surface of the rotation locus by the movement .

In the first aspect of the present invention, for example, a pipe is supported while being sandwiched between the first support member and the second support member and supported by the third support member on the lower side. Become. Even if the pipe is a round pipe or a square pipe, the third support member is on the lower side, so even if the pipe is sandwiched between the first support member and the second support member, There is no case where the position is displaced downward and the first support member and the second support member are strongly sandwiched.
For example, when the pipe is a square pipe, the third support member can prevent the pipe from dropping down when the corner is disposed between the first support member and the second support member.

In the case of a round pipe, the outermost circumferential surface of the rotation locus coincides with the outer circumferential surface, and the round pipe always has three points by the first support member, the second support member, and the third support member. It becomes a supported state.
In the case of a square pipe, the outermost peripheral surface of the rotation locus is a circle drawn by the rotation locus of the corner, and is basically a shape that circumscribes the cross section of the square pipe.

  Therefore, when the square pipe is rotated, the corner portions thereof are in contact with the first to third support members, respectively, and the shaft center is not greatly moved up and down and can be rotated stably. Become. In addition, since the pipe is basically supported on the first support member, the second support member, and the third support member, the pipe can move in the axial direction although friction occurs. .

Further, since the first support member and the second support member are arranged in a V shape with the upper side opened, and the third support member is arranged below the pipe to be supported, the pipe is placed above the workpiece support device. It becomes possible to carry in from the inside and can carry out toward the upper side. It is also possible to carry the pipe in and out along the axial direction. Therefore, the pipe can be carried in and out freely according to the situation. In particular, when a pipe is carried in and out with the axial direction being substantially parallel, it can be carried in and out simply by hanging or lifting the pipe, for example, if it is not inserted into a rotating jig Compared to the case where the pipe cannot be rotatably supported, the working efficiency can be greatly improved.
The workpiece support device is not only a pipe, that is, a cylindrical workpiece, but also a cylindrical workpiece or a prismatic workpiece can be rotated around the axis and moved in the axial direction within the allowable support weight. It can be supported freely.
Furthermore, when the position of the outermost peripheral surface of the above-mentioned rotation locus is changed by changing the type of pipe to be processed with a simpler configuration than the configuration in which the third support member is translated in the vertical direction, for example. The third support member can be rotated and moved so that the contact portion of the third support member comes into contact with the outermost peripheral surface.

  According to a second aspect of the present invention, in the work support device according to the first aspect, the first support member, the second support member, and the third support member may support the rotational axis direction with respect to the axial direction of the work. It is characterized by being a roller substantially parallel to the orthogonal direction.

  In the invention according to claim 2, since each support member is a roller having a rotation axis substantially parallel to a direction orthogonal to the axial direction of the pipe to be supported, it corresponds to the movement of the pipe in the axial direction. The roller rotates, and the axial movement of the pipe can be made smooth.

  According to a third aspect of the present invention, there is provided the work support device according to the second aspect, wherein the roller is supported by the transport roller device in a replaceable manner, and the transport roller device includes a shaft and left and right ends of the shaft. A pair of bearing units having self-aligning bearings that are rotatably supported, a roller that is inserted and rotated so that the shaft can be inserted and removed, and a pair of support plates to which the bearing unit is fixed are provided to face each other. A use position where one of the pair of support plates can use the roller along a direction substantially perpendicular to the axial direction of the shaft; A support plate fitting portion is provided that is movably fitted between an attachment / detachment position for attaching / detaching the support plate, and the support plate fitting portion is provided with the support plate disposed at the use position. Detachably fitted, characterized in that the position holding means for holding the support plate in the use position is provided.

  In the invention according to claim 3, one of the support plates to which the bearing unit is fixed is fitted to the support plate fitting portion, and the use position where the roller can be used, and the support It is movable between a detachable position where the plate is detachable. At this time, since both ends of the shaft are supported by the self-aligning bearing, the shaft can be rotated around the center of the self-aligning bearing, and the shaft moves along with the movement of the support plate. The both end portions of the shaft move so as to be inclined with respect to the self-aligning bearing.

When the support plate moves to the attachment / detachment position, the support plate can be attached / detached from the support plate fitting portion. For example, the support plate is removed from the housing along the axial direction of the shaft.
Further, when the support plate is moved from the use position, it is moved after removing the position holding means that can be attached to and detached from the support plate. In other words, unless the position holding means is removed from the support plate, the support plate is held at the use position, so that the roller is not disabled due to movement of the support plate during use.

By removing the bearing unit from one end side of the shaft, the roller can be inserted and removed from the shaft, and the roller can be replaced.
According to the invention as described above, the support plate can be moved with respect to the support plate fitting portion by removing the position holding means of the support plate fitting portion from the support plate to which the bearing unit is fixed. It becomes possible to move to the attachment / detachment position. The support plate can be removed from the housing and the shaft by moving from the rotation position to the attachment / detachment position, and the roller can be removed from the shaft by removing the bearing unit together with the support plate from the housing and the shaft.

Further, it is possible to attach the bearing unit to one end of the shaft after attaching the roller to the shaft in the reverse procedure of the above-described removal.
According to the present invention, it becomes easy to remove and attach the roller, and the roller can be replaced in a short time. In particular, there is no work of tightening or loosening screws, bolts or the like with tools, and the work time can be shortened. In addition, no trouble is required for temporary storage of the removed screws and bolts. That is, it is possible to minimize the number of parts to be removed at the time of roller replacement, and to reduce the trouble of temporarily storing parts.

The workpiece support device according to claim 4 is the invention according to any one of claims 1 to 3 , wherein the first support member, the second support member, and the third support member include the workpiece and A shock absorber is provided for buffering the impact caused by the contact.

In the invention according to claim 4 , when the square pipe is supported, the corner portion of the square pipe comes into contact with or separates from the first to third support members. Reduced by the device, the square pipe can be rotated stably.

According to the work supporting equipment of the present invention, without the parts replacement and replacement of the jig, both can move freely rotatably supported and axially square pipe with round pipe as a work, and a diameter Different pipes can be supported without exchanging parts or jigs, and workpieces can be loaded and unloaded from above, reducing equipment costs and improving work efficiency.
In addition, the rollers can be replaced in a short time with an easy operation.

It is a figure which shows the conveyance roller apparatus which concerns on embodiment of this invention, (a) is a perspective view, (b) is a side view. It is a perspective view which shows the said conveyance roller apparatus during roller replacement | exchange. It is a perspective view which shows the said conveyance roller apparatus during roller replacement | exchange. It is a perspective view which shows the workpiece | work support apparatus which concerns on embodiment of this invention used with a laser processing apparatus. It is a perspective view which shows the said workpiece | work support apparatus. It is a front view which shows the said workpiece | work support apparatus. It is AA arrow sectional drawing of FIG. It is a perspective view which shows the conventional conveyance roller apparatus. It is a perspective view which shows the conventional conveyance roller apparatus during roller replacement | exchange.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view illustrating a transport roller device according to an embodiment of the present invention, FIG. 2 is a perspective view illustrating the transport roller device during roller replacement, and FIG. 3 is a perspective view illustrating the transport roller device during roller replacement. It is.

  The conveyance roller device of this example includes a shaft 10 and a pair of bearing units 11 (only one bearing unit 11 is illustrated) including a self-aligning bearing that rotatably supports the left and right ends of the shaft 10. A housing 15 provided with a roller 12 inserted and removably inserted into the shaft 10 and a pair of support plates (fixed support plate 13 and detachable support plate 14) to which the bearing unit 11 is fixed; And a collar 16 for regulating the position of the roller 12.

The shaft 10 includes a cylindrical shaft body 10a and support shafts 10b formed coaxially with the shaft body 10a at both ends of the shaft body 10a. The support shaft 10b has a smaller diameter than the shaft body 10a.
Although not shown, the bearing unit 11 includes an outer ring, an inner ring disposed inside the outer ring, a rolling element (for example, a ball and a roller) disposed between the outer ring and the inner ring, and a holding unit that rotatably holds the rolling element. With a vessel. Further, as a well-known self-aligning bearing, in the bearing unit 11, the inner peripheral surface of the outer ring is a spherical surface and the rolling element can roll along the spherical surface. The vessel and the inner ring are swingable with respect to the outer ring so that the rotation axis is inclined.

  Therefore, even if the position of one of the self-aligning bearings (bearing unit 11) that supports one shaft 10 is slightly moved, the shaft 10 may be bent or the bearing may be broken. The shaft 10 is maintained in a state where the shaft 10 can rotate in an oblique state. That is, the angle of the axis is automatically adjusted.

The bearing unit 11 is provided with a flange portion 11b on the outer peripheral side of the self-aligning bearing portion, and the flange portion 11b is fastened to a fixed support plate 13 and a detachable support plate 14 described later of the housing 15 by a bolt 11a with a hole. Yes. Thereby, the bearing unit 11 is being fixed to the fixed support plate 13 and the detachable support plate 14, respectively.
Further, a support shaft 10b of the shaft 10 is inserted into the cylindrical inner ring of the bearing unit 11, so that the shaft 10 and the inner ring of the bearing unit 11 can rotate integrally.

The housing 15 is disposed at the left and right sides of the shaft 10 in parallel with the shaft 10, the fixed support plate 13 disposed at one end of the pair of side plates 15 a, and the other end. An detachable support plate 14 that is detachably attached to the housing 15 and a support plate fitting portion 17 that detachably holds the detachable support plate 14 are provided.
The bearing unit 11 is fixed to the outer surface of the fixed support plate 13 as described above, and the end portions of the side plates 15a are fixed to the left and right end portions on the inner surface side. The side plate 15a is disposed below the center of the shaft 10 so as not to interfere with, for example, a work (conveyed object) conveyed on the roller 12.

The support plate fitting portion 17 has a structure in which three guide plates 18, 19, and 20 are overlapped, the left and right width is substantially the same as the fixed support plate 13, and the vertical width is shorter than the fixed support plate 13. Yes. Further, the height of the support plate fitting portion 17 is such that the lower end is substantially the same as the lower end of the fixed support plate 13 and the upper end is lower than the upper end of the fixed support plate.
The three first to third guide plates 18, 19, 20 are stacked along the axial direction of the shaft 10, and the first guide plate 18 closest to the fixed support plate 13 has a substantially rectangular shape. A substantially semicircular semicircular cutout portion 18a having an open upper side is formed in the plate body.

The semicircular cutout portion 18a allows the cylindrical roller 12 to be taken in and out, and is disposed in a state where the end portion of the shaft 10 (support shaft 10b) passes therethrough.
Moreover, the left and right width and the vertical width of the semicircular notch 18a are narrower than the left and right width and the vertical width of the detachable support plate 14, and the detachable support plate 14 is fitted to the support plate fitting portion 17 as described later. At this time, the inner surface of the detachable support plate 14 comes into contact with the outer surface of the second guide plate 18 (the side surface opposite to the fixed support plate 13). The lower edge abuts on a portion of the side surface of the first guide plate 18 that is outside the semicircular notch 18a, and restricts the removable support plate 14 from moving toward the fixed support plate 13 side. Here, the up and down direction is a vertical direction in a state where the axial direction of the roller 12 is horizontally arranged, and the left and right direction is a direction along the horizontal direction and orthogonal to the axial direction of the roller 12. Further, the front-rear direction is a direction parallel to the axial direction of the roller 12.

  Further, as will be described later, a portion of the outer surface of the first guide plate 18 exposed from the second and third guide plates 19 and 20 has a screw hole (not shown) for screwing a stripper bolt (stepped bolt) 18b. Is formed. The stripper bolt 18b is attached to the first guide plate 18 by screwing a screw portion (not shown) at the tip of the stripper bolt 18b into the screw hole. Also, a bush 18e is extrapolated between a threaded portion on the front end side of the stripper bolt 18b and a head portion 18c on the rear end side in a cylindrical portion 18d having a diameter larger than that of the screw portion and smaller than that of the head portion 18c. It is in a state. The bush 18e has a shape in which a cylindrical small-diameter portion 18f and a large-diameter portion 18g having a larger diameter than the small-diameter portion 18f are joined in a state of being aligned in the axial direction.

  The cylindrical portion 18d of the stripper bolt 18b is inserted into the bush 18e so that the enlarged diameter portion 18g of the bush 18e is on the head 18c side of the stripper bolt 18b. The bush 18e is connected to the stripper bolt 18b by the stripper bolt 18b. It is movable along the bolt 18b.

A compression coil spring 18i is externally inserted between the bush 18e and the head 18c of the cylindrical portion 18d of the stripper bolt 18b. The bush 18e is connected to the first guide plate from the head 18c side of the stripper bolt 18b. It is biased to the 18th side.
In addition, screw holes (not shown) are formed at the four corners of the first guide plate 18, and the first to third guide plates 18, 19, and 20 are fastened with hole bolts 18h as will be described later. It is supposed to be.

  A second guide plate 19 is fixed to the first guide plate 18 so as to overlap the side surface opposite to the fixed support plate 13. The left and right side edges and the lower side edge of the second guide plate 19 have the same shape as the left and right side edges and the lower side edge of the first guide plate 18. In the first guide plate 18 and the second guide plate 19, The left and right side edges and the lower side edge are overlapped at the same left and right position and the same vertical position.

  The second guide plate 19 is provided with a rectangular cutout portion 19a that is larger than the semicircular cutout portion 18a of the first guide plate 18 and is open on the upper side. The rectangular notch 19a is formed corresponding to the shape of the detachable support plate 14, and has a width that is slightly wider than the left and right width of the detachable support plate 14, and is attached to and detached from the rectangular notch 19a. The support plate 14 can be inserted, and the detachable support plate 14 can be moved up and down along the left and right inner surfaces of the rectangular notch 19 a of the second guide plate 19.

In addition, the rectangular notch 19a of the second guide plate 19 is in a state where the portion of the first guide plate 18 to which the above-described stripper bolt 18b is fixed is opened.
Further, bolt holes (not shown) communicating with the screw holes at the four corner portions of the first guide plate 18 are formed at the four corner portions of the second guide plate 19.

  A third guide plate 20 is fixed to the second guide plate 19 on the side surface opposite to the first guide plate 18. The left and right side edges and the lower side edge of the third guide plate 20 have the same shape as the left and right side edges and the lower side edge of the first and second guide plates 18 and 19, and the first guide plate 18 and the second guide In the plate 19 and the third guide plate 20, the left and right side edges and the lower side edge are overlapped at the same left and right position and vertical position.

  The third guide plate 20 is formed with a rectangular notch 20a with the upper side opened. The rectangular notch 20a has the same shape and the same size as the rectangular notch 19a of the second guide plate 19, and the rectangular notch 19a of the second guide plate 19 and the rectangular notch 20a of the third guide plate 20 Are overlapped at the same horizontal position and vertical position.

Claw portions 20b and 20c projecting from the left and right inner edges and the lower inner edge to the rectangular notch portion side are provided at the rectangular notch portion 20a of the third guide plate 20, respectively. The claw portions 20 b and 20 c are positioned so as to overlap the side edge of the detachable support plate 14 in the front-rear direction in a state where the detachable support plate 14 is housed in the rectangular cutout portion 19 a of the second guide plate 19.
The claw portions 20 b at the left and right inner edges of the third guide plate 20 are equal in vertical position, and the claw portions 20 c at the lower inner edge are provided at the center in the left and right direction of the third guide plate 20.

  When the detachable support plate 14 is fitted to the support plate fitting portion 17, the detachable support plate 14 includes a portion exposed from the rectangular notch 19 a of the second guide plate 19 of the first guide plate 18, and the third guide plate. Between the claw portions 20b and 20c protruding into the 20 rectangular cutout portions 20a, the second guide plate 19 is accommodated in the rectangular cutout portion 19a.

In the state where the lower end surface of the detachable support plate 14 is in contact with the lower inner edge of the rectangular notch 19a of the second guide plate 19, the detachable support plate 14 has a left and right position and a lower position at the second guide plate. The left and right inner surfaces and the lower inner surface of the 19 rectangular cutouts 19a are restricted.
Further, the movement of the detachable support plate 14 toward the fixed support plate 13 side is exposed from the rectangular cutout portion 19a of the second guide plate 19 outside the semicircular cutout portion 18a of the first guide plate 18 as described above. Is regulated. The movement of the detachable support plate 14 to the opposite side of the fixed support plate 13 is regulated by the claw portions 20 b and 20 c of the third guide plate 20.

Further, the upward movement of the detachable support plate 14 is restricted by a bush 18e extrapolated to the above-described stripper bolt 18b as described later.
A bearing unit 11 is fixed to the detachable support plate 14 by fastening a flange portion 11b to the detachable support plate 14 with a bolt 11a with a hole.
The left and right width of the rectangular attachment / detachment support plate 14 is slightly narrower than the left and right widths of the rectangular notches 19a and 20a of the second guide plate 19 and the third guide plate 20 as described above.
Further, the left-right width of the detachable support plate 14 is made wider than the interval between the left and right claw portions 20 b of the third guide plate 20.

  In the lower part of the detachable support plate 14, when the lower end surface of the detachable support plate 14 is in contact with the lower inner surface of the rectangular notch 19a of the second guide plate 19, the lower side is located at a position corresponding to the stripper bolt 18b. A bolt notch 14a is provided at the opening. The upper portion of the bolt notch portion 14a is formed in a semicircular shape, and its radius is slightly larger than the radius of the cylindrical portion 18d of the stripper bolt 18b. The bolt notch portion 14a has a width that is slightly wider than the diameter of the cylindrical portion 18d. When the attach / detach support plate 14 is moved up and down within the rectangular notch portion 19a of the second guide plate 19, the bolt notch portion 14a is supported. The cylindrical portion 18d of the stripper bolt 18b is relatively movable up and down in the bolt notch portion 14a of the plate 14, and the cylindrical portion 18d of the stripper bolt 18b is for the bolt from the lower side of the bolt notch portion 14a. It is possible to enter and exit the cutout portion 14a.

Further, around the upper end portion of the bolt cutout portion 14a on the outer surface of the detachable support plate 14, a circular countersunk hole 14b centering on the center of the semicircular portion of the bolt cutout portion 14a is formed. The counterbore hole 14b and the bolt notch 14a overlap each other, and the counterbore hole 14b is partially cut away.
The center of the counterbore hole 14b is equal to the center of the cylindrical portion 18d of the stripper bolt 18b that passes through the semicircular portion of the bolt cutout portion 14a. The diameter of the counterbore hole 14b is substantially equal to the diameter of the small diameter portion 18f of the bush 18e, and is larger than the diameter of the small diameter portion 18f by the clearance.

In a state where the detachable support plate 14 is fitted to the support plate fitting portion 17, the small diameter portion 18f of the bush 18e is inserted into the counterbore hole 14b, and in this state the bush 18e is attached to the detachable support plate 14. The bush 18e is biased by the compression coil spring 18a to prevent the bush 18e from coming out of the counterbore hole 14b.
The axial length of the small-diameter portion 18f of the bush 18e is longer than the depth of the counterbore hole 14b, and the enlarged-diameter portion 18g of the bush 18e is in a state separated from the detachable support plate 14. Thereby, it is possible to put a finger on the enlarged diameter portion 18g of the bush 18e and pull out the bush 18e from the counterbore hole 14b.

Grooves (notches) 14c along the thickness direction are formed in the left and right side edges of the detachable support plate 14 at the same height position. The cross-sectional shape of the groove 14 c is slightly larger than the claw portion 20 b protruding from the left and right inner surfaces of the rectangular cutout portion 20 a of the third guide plate 20, and the claw portion 20 b is the thickness of the detachable support plate 14. It can pass relatively in the direction.
Further, the positions of the left and right grooves 14c are lower than the claw portions 20c of the third guide plate 20 when the detachable support plate 14 is fitted to the support plate fitting portion 17, and the grooves at this time The distance between 14c and the left and right claw portions 20b is longer than the vertical length of the claw portion 20c on the lower side of the third guide plate 20 (projection length to the rectangular cutout portion 20a).

  Therefore, the detachable support plate 14 is fitted to the support plate fitting portion 17, the lower end surface of the detachable support plate 14 is in contact with the lower inner surface of the rectangular notch 19 a of the second guide plate 19, In a state where the small diameter portion 18f of the bush 18e is inserted into the hole 14b, the position of the groove 14c of the detachable support plate 14 and the position of the left and right claw portions 20b of the third guide plate 20 are not overlapped with each other. ing. In this state, the transport roller device is used and the roller 12 is rotated, so that the position of the detachable support plate 14 in this state is the use position (rotation position) of the transport roller device (roller 12).

  From this state, when the bush 18e is pulled out from the counterbore hole 14b and the detachable support plate 14 is moved upward as described above, the detachable support plate 14 is detached from the lower claw portion 20c of the third guide plate 20. At the same time, the left and right grooves 14c of the attachment / detachment support plate 14 are overlapped with the left and right claws 20b of the third guide plate 20 in the front-rear direction, and the attachment / detachment support plate 14 is moved in the front-rear direction. Can be removed. That is, the position of the attachment / detachment support plate 14 in this state is the attachment / detachment position. Note that the front-rear direction here is along the axial direction of the roller 12 of the transport roller device, for example, the fixed support plate 13 side is the rear and the detachable support plate 14 side is the front. However, the front and back may be reversed.

  At this time, the support shaft 10 b at one end of the shaft 10 is inserted into the inner ring of the bearing unit 11 fixed to the outer surface of the detachable support plate 14, and the movement of the detachable support plate 14 is restricted by the shaft 10. However, since the bearing of the bearing unit 11 into which the support shafts 10b at the left and right ends of the shaft 10 are inserted is the self-aligning bearing described above, the shaft 10 is inclined with respect to the bearing unit 11. It has become. Accordingly, the detachable support plate 14 can be moved without being restricted by the shaft 10, and an excessive force is not applied to the shaft 10 or the bearing portion due to the movement of the detachable support plate 14.

  The collar 16 is a member that is disposed between the roller 12 and the detachable support plate 14 (bearing unit 11) and regulates the axial position of the roller 12. The cylindrical portion 16a and the roller of the cylindrical portion 16a It comprises a flange-shaped (doughnut-shaped) contact plate 16b formed on the 12 side. The inner diameter of the cylindrical portion 16a is larger than the outer diameter of the support shaft 10b of the shaft 10 by the clearance, and the shaft 10 penetrates the cylindrical portion 16a. The contact plate 16b has a circular shape with a hole in the center and has an outer diameter substantially the same as the outer diameter of the roller 12, and contacts the end surface of the roller 12 on the side of the detachable support plate 14. Further, an end surface of the cylindrical portion 16 a of the collar 16 opposite to the contact plate 16 b contacts the side surface inside the bearing unit 11. That is, the collar 16 is disposed between the bearing unit 11 and the roller 12 and regulates the movement of the detachable support plate 14 toward the bearing unit 11 along the axial direction of the roller 12.

In the transport roller device as described above, when the roller 12 is replaced, the bush 18e is pulled out from the counterbore 14b of the support plate 14 with one hand against the urging force of the compression coil spring 18i as described above. While maintaining this state, the detachable support plate 14 is moved upward with the other hand.
Then, the detachable support plate 14 is pulled out to the front side in a state where the left and right grooves 14 c of the detachable support plate 14 overlap the left and right claw portions 20 b of the third guide plate 20.

Thereby, the detachable support plate 14 is removed from the housing 15 and the shaft 10.
Next, the collar 16 and the roller 12 are removed from the shaft 10. For example, in order to replace the roller 12 with another roller 12 such as a different type of roller 12, a new roller 12, a repaired roller 12, the shaft 10 is inserted into the replacement roller 12 and the collar 16. The rollers 12 and the collar 16 are relatively moved so as to be attached to the shaft 10. Next, the positions of the left and right grooves 14c of the detachable support plate 14 and the left and right claws 20b of the third guide plate 20 are aligned, and the detachable support plate 14 is inserted into the support plate fitting portion 17 and is moved downward. Moving.

  Next, with the bush 18e moved in the pulling direction with one hand, the detachable support plate 14 is moved downward until the lower end surface of the detachable support plate 14 comes into contact with the lower inner surface of the rectangular notch 19a of the second guide plate 19. By moving and releasing the hand from the bush 18e, the small diameter portion 18f of the bush 18e is inserted into the counterbore hole 14b of the attachment / detachment support plate 14, thereby completing the replacement of the roller 12.

  Compared to the conventional technique, a tool (jig) such as a wrench for loosening or tightening the bolt is not required, and the work can be performed by hand. In addition, the working time for removing and attaching the bolt is not required, and the working time can be greatly reduced. Also, workability is extremely easy. Moreover, it is not necessary to manage the bolts removed at the time of roller replacement so that they are not lost as in the case of using bolts.

In the following, the working time is compared between the conventional conveying roller device using fixing with bolts and the conveying roller device of this example.
In the transport roller device of this example, the work time of each work described above is as follows.
1. 0.5 seconds to pull out the bush 18e.
2. Next, 0.5 second is required to move the detachable support plate 14 upward.
3. Next, it takes 0.5 seconds to move the detachable support plate 14 forward and remove it from the housing 15 and the shaft 10.
4). 1 second to remove the collar 16 and the roller 12 from the shaft 10.
5. One second to attach the roller 12 and collar 16 to the shaft 10.
6). It takes 0.5 seconds to attach the removable support plate 14.
7). 0.5 seconds to pull out the bush 18e.
8). It takes 0.5 seconds to move the detachable support plate 14 downward to release the bush 18e and insert it into the counterbore 14b.
From the above time, the time required for roller replacement is substantially the shortest, for example, about 5 seconds.

On the other hand, when bolts 7 and 8 with holes are used for fixing the shaft 3 and the inner ring of the bearing of the conventional conveying roller device shown in FIGS. The working time is as follows.
1. 1 second to insert a wrench (jig) into the hole provided in the shaft 3 and the roller 4 Note that this is when loosening (or tightening) the bolt 8 with a hole screwed into the shaft 3 as follows. This is to prevent the shaft 3 from rotating, and is an operation for receiving torque during rotation of the bolt 8 with a wrench.
2. It takes 10 seconds to remove the bolt 8 with a hole fixing the bearing unit 1 and the shaft 3 with a wrench (for example, a hexagon wrench).
3. It takes 20 seconds to remove the two bolts 7 with the holes attaching the bearing unit 1 to the support plate 5 with a wrench.
4). It takes 1 second to remove the bearing unit 1 from which the bolt 7 with a hole has been removed from the shaft 3 and the housing 2.
5. 1 second to remove roller 4.
6). 1 second to install a new roller 4
7). It takes 1 second to place the bearing 3 in the housing 2 with the shaft 3 inserted.
8). It takes 20 seconds to fasten the bearing unit 1 to the support plate 5 with two bolts 7 with a hole using a wrench.
9. 1 second to insert the wrench into the hole in the shaft 3 and roller 4.
10. It takes 10 seconds to fasten the inner ring of the bearing unit 1 to the shaft 3 with a bolt 8 with a hole using a wrench.

From the above time, the time required for the roller replacement is almost the shortest (if the bolt is attached and removed for 10 seconds, it may be shortened a little if the bolt is rotated with an electric tool), and it takes 66 seconds.
Accordingly, since a difference of about 1 minute is generated by exchanging one roller, when there are a large number of conveying roller devices, a large difference occurs in work time.

Next, with reference to FIGS. 4-7, the workpiece | work support apparatus provided with the above-mentioned conveyance roller apparatus is demonstrated.
4 is a perspective view showing a workpiece support device according to an embodiment of the present invention used in a laser processing apparatus, FIG. 5 is a perspective view showing the workpiece support device according to an embodiment of the present invention, and FIG. It is a front view which shows a workpiece | work support apparatus, FIG. 7 is AA arrow sectional drawing of FIG.

  As shown in FIGS. 4-7, the workpiece support apparatus 81 is arrange | positioned adjacently regardless of before and behind the pipe processing machine 82 shown, for example in FIG. The pipe processing machine 82 includes at least a laser processing head (laser torch) 83 that can move within a predetermined range along the axial direction of the pipe P to be processed, and a pipe that supports and rotates the pipe P in a horizontal state. For example, the pipe P can be drilled or cut in any shape by rotating the pipe P and moving the laser processing head 83 along the axial direction of the pipe P. It has become.

  The workpiece support device 81 supports the pipe P horizontally when the pipe P is loaded into the pipe processing machine 82, and moves the pipe P in the axial direction so that the pipe P can be loaded into the pipe processing machine 82. During the sequential processing by the pipe processing machine 82 from the front side, the pipe P protruding from the pipe processing machine 82 is supported so as to be rotatable about its axis and movable in the axial direction. That is, the workpiece support device 81 supports a workpiece such as the pipe P so as to be rotatable about the axis and movable in the axial direction.

  The workpiece support device 81 includes a round pipe having a circular cross section and a regular polygonal shape in cross section (for example, not a perfect regular polygon, but R is attached to the corner or the corner is chamfered). ) Is supported as a workpiece. The workpiece support device 81 can support a long workpiece and a workpiece whose cross-sectional shape is a circle or a regular polygon. The work that can be supported by the work support device is not limited to a pipe, and can be supported by a columnar work that is not cylindrical as long as it is within the allowable support weight.

Then, in response to the processing by the pipe processing machine 82, the pipe P is rotatably supported, and the pipe P is fed so that the pipe P can be sent to the pipe processing machine 82 every time processing is completed. It is supported so as to be movable in the axial direction.
The work support device 81 includes a fixed stand part 21 and two work holder parts 30 that are supported by the fixed stand part 21 in the front and rear directions.

The fixed stand part 21 is provided with end frames 22 each having an isosceles triangle shape on the front and rear sides. Here, for the sake of convenience, the end on the left front side is referred to as the front and the end on the right rear side is referred to as the rear toward the work support device illustrated in FIG.
The end frame 22 includes three rectangular tubes 24 and 25 that are bridged between the front and rear end frames 22 at positions that are the three apexes of the triangular end frame 22. Two square tubes 24, 24 are arranged on the left and right of the bottom of the end frame 22, and one square tube 25 is arranged corresponding to the top vertex. The end frame 22 and the three rectangular tubes 24 and 25 constitute a frame of the fixed stand portion 21. The frame of the fixed stand portion 21 is made of steel, for example.

The end frame 22 has a square tube 23 that passes through the apex of the triangle and is disposed along the vertical direction. The square tube 23 serves as a base end portion of a work holder unit 30 described later. A square pipe 31 having a smaller diameter than the square pipe 23 is inserted. The square pipe 31 is supported by the square tube 23 so as to be movable up and down.
Further, a caster 26 that allows the fixed stand portion 21 to move on the floor surface and a fixed stand portion 21 are fixedly attached to the front and rear ends of the two left and right square tubes 24, 24 at the bottom. And a leg portion 27 for support. The leg 27 is movable up and down with respect to the square tubes 24 and 24 and is moved up and down with respect to the caster 26.
Further, the front and rear end frames 22 are each provided with a connecting member 29 at a position corresponding to the bottom side thereof. For example, the connecting member 29 is used for connection with a pipe processing machine 82 or for connecting a work support device 81. It is done.

As described above, the work holder portion 30 includes a square pipe 31 inserted into the square tube 23 at the front and rear ends of the fixed stand portion 21 so as to freely move up and down, a housing base 32 fixed to the square pipe 31, A first transport roller device (first support member) 33, a second transport roller device (second support member) 34, and a third transport roller device (third support member) 35 are provided. The first transport roller device 33, the second transport roller device 34, and the third transport roller device 35 have the configuration as the transport roller device described above.
Of the outer peripheral surfaces of the rollers 12 of the first transport roller device 33, the second transport roller device 34, and the third transport roller device 35, a substantially linear portion facing the supported pipe side contacts a pipe as a workpiece. It becomes a contact part to do.
In the first transport roller device 33, the second transport roller device 34, and the third transport roller device 35, the shaft 3 is a metal cylinder and the roller 12 is made of resin.

The housing base 32 includes a main base 36 that supports the first transport roller device 33 and the second transport roller device 34, and a sub base 37 fixed to the main base 36, as will be described later.
The main base 36 is connected to the upper end of the square pipe 31 and is horizontally disposed with a bottom plate 36a and a side plate 36b along the vertical direction in a state of being bent upward from the rear edge of the bottom plate 36a. It has.

The sub-base 37 is fixed to the bottom plate 36a of the main base 36, and extends vertically from the front edge of the bottom plate 37a along the vertical direction. And a side plate 37b arranged in parallel with a gap on the front side.
The first transport roller device 33, the second transport roller device 34, and the third transport roller device 35 are each around the axis by the housing 15 to which the bearing unit 11 that rotatably supports the roller 12 is fixed at both ends. Is supported rotatably. The housing 15 is provided with side plates 15a extending in the axial direction of the roller 12 on the front and rear sides thereof, connecting the side plates 15a to both ends of the side plates 15a, and supporting the bearing unit 11. Plates 13 and 14 are provided.

Further, a lever member 44 is fixed to each housing 15 along the axial direction of the roller 12.
The lever member 44 attached to the housing 15 of the first transport roller device 33 and the second transport roller device 34 is connected to a center pin 45 disposed through substantially the center of the side plate 36b of the main base 36 of the housing base 32. The center pin 45 is rotatably attached to the housing base 32. The first transport roller device 33 and the housing 15 and the second transport roller device 34 and the housing 15 are arranged obliquely so as to be symmetrical with each other, so that they are V-shaped with the upper side opened. Is arranged.

The first transport roller device 33 (housing 41) is attached to the rear side of the side plate 36b of the main base 36, and the second transport roller device 34 (housing 15) is attached to the front side of the side plate 36b. The first transport roller device 33 and the second transport roller device 34 are arranged at positions shifted forward and backward.
In addition, a notch is provided at a position between the first conveyance roller device 33 and the second conveyance roller device 34 in the upper central portion of the side plate 36b, and the side plate 36b is provided with the first conveyance roller device 33 and the second conveyance roller device. 34 so as not to obstruct the pipe P disposed between the two.

  The lower end of the lever member 44 fixed to the housing 15 of the first conveying roller device 33 is connected to the center pin 45 and the lever member is fixed to the housing 15 of the second conveying roller device 34. The lower end of 44 is connected to the center pin 45, and the V-shaped opening angle formed by the first transport roller device 33 and the second transport roller device 34 can be changed.

A plate-shaped housing bracket 46 is rotatably attached to the center pin 45 corresponding to the first conveying roller device 33, and a plate-shaped housing bracket 47 is rotated corresponding to the second conveying roller device 34. It is attached freely.
The housing bracket 46 is arranged along the rear surface of the side plate 36b of the main base 36 of the housing base 32 and in contact therewith, and the housing bracket 47 is arranged along the front surface of the side plate 36b and in contact therewith. Yes.

Further, the lever member 44 fixed to the housing 15 that rotatably supports the roller 12 of the first transport roller device 33 around the axis, and the housing bracket 46 corresponding to the first transport roller device 33 serve as a shock absorber. Are connected via a damper 51. The housing bracket 46 is formed with, for example, two concentric circular arc-shaped holes centered on the center pin 45, and the side plate 36 b of the main base 36 is located at a position overlapping the elongated hole of the housing bracket 46. Bolt holes are formed respectively. Then, the housing bracket 46 and the side plate 36b are connected to the long hole and the side plate 36b with the first conveying roller device 33 connected to the housing bracket 46 via the damper 51, the lever member 44, and the housing bracket 46 at a predetermined angle. Fastened with bolts that pass through the bolt holes.
Basically, the first transport roller device 33, the lever member 44, the damper 51, and the housing bracket 46 can be rotated substantially integrally with the center pin 45 as a rotation center.

Similarly, the lever member 44 fixed to the housing 15 that rotatably supports the roller 12 of the second transport roller device 34 around the axis and the housing bracket 47 corresponding to the second transport roller device 34 serve as a shock absorber. Are connected via a damper 52. The housing bracket 47 is formed with, for example, two concentric circular arc holes centered on the center pin 45, and the side plate 36 b of the main base 36 is positioned so as to overlap with the long hole of the housing bracket 47. Bolt holes are formed respectively. The housing bracket 47 and the side plate 36b are connected to the long hole and the side plate 36b with the second conveying roller device 34 connected to the housing bracket 47 via the damper 52, the lever member 44, and the housing bracket 47 at a predetermined angle. Fastened with bolts that pass through the bolt holes.
Further, the second conveying roller device 34, the lever member 44, the damper 52, and the housing bracket 47 can be rotated substantially integrally with the center pin 45 as a rotation center.

  The first conveyance roller device 33 and the second conveyance roller device 34 have a symmetrical angle. For example, when supporting a round pipe, the first conveyance roller device 33 and the second conveyance roller device 34 are arranged in a V shape. When the round pipe is inserted between the two first conveying roller devices 33 and the second conveying roller device 34 from the open portion on the upper side of the second conveying roller device 34, the round pipe is formed by the two first conveying roller devices 34. 33 and the second conveying roller device 34.

  In this case, when the round pipes having different diameters are supported, the center positions of the round pipes are different vertically, but the first transport roller device 33 and the second transport roller device 34 are symmetrical, that is, the first The first transport roller device 33 and the second transport roller device 34 are inclined to the left and right so as to be a target with respect to a vertical line passing through the center of the first transport roller device 33 and the second transport roller device 34. Therefore, the center of the round pipe does not shift in the horizontal direction perpendicular to the axial direction, and the left and right positions of the center of the round pipe are constant regardless of the diameter of the round pipe.

  From the above, the first transport roller device 33 and the second transport roller device 34 are arranged in a V shape with the upper side opened so as to support, for example, a pipe as a workpiece, and these The opening angle between the first conveyance roller device 33 and the second conveyance roller device 34 can be adjusted. Further, the first transport roller device 33 and the second transport roller device 34 are not completely fixed, and are attached to the housing base 32 via the dampers 51 and 52. When an impact is applied to the first transport roller device 33 and the second transport roller device 34, the angle slightly varies (swings) while being supported by the dampers 51 and 52 to absorb the impact. ing.

  The angle between the first transport roller device 33 and the second transport roller device 34 is such that when the pipe P supported by the first transport roller device 33 and the second transport roller device 34 is rotated, For example, when the pipe P rotates to the right (rotates clockwise) toward the right, the second transport roller device 34 on the right side of the pipe P moves toward the pipe P. When the pipe P is rotated to the left (rotates counterclockwise), the force is applied to the pipe P so that the left first conveying roller device 33 is raised.

  Here, for example, the opening angle is set so that a pipe that may be experimentally used in the workpiece support device of this example does not go up the first transport roller device 33 or the second transport roller device 34. That is, when the first conveyance roller device 33 and the second conveyance roller device 34 are at an angle close to horizontal, the pipe P is likely to rise, and when the first conveyance roller device 33 and the second conveyance roller device 34 are at an angle close to vertical, the pipe Since it becomes difficult for P to rise, the housing brackets 46 and 47 are fastened to the side plate 36b as described above, so that the pipe P is set at an appropriate angle.

In the third transport roller device 35, a lever member 44 fixed to the housing 15 is rotatably supported by a center pin 54 that penetrates the side plate 37 b of the sub base 37 of the housing base 32.
The position of the center pin 54 is outside the V-shape formed by the first conveyance roller device 33 and the second conveyance roller device 34. In this example, the center pin 54 is positioned on the second conveyance roller device 34 of the first conveyance roller device 33. On the opposite side, on the opposite side, the position is higher than the portion supported by the center pin 45 at the lower end of the first transport roller device 33.

  A plate-shaped housing bracket 48 is rotatably supported on the center pin 54. The housing bracket 48 is disposed along and in contact with the front surface of the side plate 37 b of the sub base 37, and is rotatable along the front surface of the side plate 37 b of the sub base 37. In addition, two arc-shaped long holes centered on the center pin 54 are concentrically arranged in the housing bracket 48.

  The side plate 37b is formed with a bolt hole at a position overlapping the elongated hole, and the housing bracket 48 that can determine the rotation angle of the third transport roller device 35 with respect to the side plate 37b is set to an arbitrary rotation angle. Thus, the side plate 37b and the housing bracket 48 can be fastened by the bolt inserted into the long hole and the bolt hole. In addition, the fixing lever 57 is fixedly attached to the bolt, and the bolt can be rotated around the shaft center, and can be fastened and released without using a spanner or the like. As will be described later, the angle of the third conveying roller device 35 can be changed.

The side plate 37b of the sub-base 37 of the housing base 32, the center pin 54 disposed through the side plate 37b, the housing 15 and the lever member 44 fixed thereto can rotate the third transport roller device 35. It becomes the rotation support means to support. The housing bracket 48, the side plate 37b, the bolts for fastening them, and the holding lever 57 for rotating the bolts hold the third transport roller device 35 at a position in contact with the outermost peripheral surface of the rotation path of the pipe P; Become.
The rotation support means and the holding means of the third transport roller device 35 serve as position adjusting means for adjusting the position of the third transport roller device 35. The position adjusting means is supported by the roller 12 (contact portion) of the first transport roller device 33, the roller 12 (contact portion) of the second transport roller device 34, and the roller 12 (contact portion) of the third transport roller device 35, respectively. The first transport roller device 33, the second transport roller device 34, and the third transport roller device so that the work (pipe) to be brought into contact with the outermost peripheral surface of the rotation locus when rotating around the axis. The position of at least the third transport roller device 35 among 35 is adjusted. In addition, the straight line which extended the part which contact | connects the said outer peripheral surface of the 1st conveying roller apparatus 33, the 2nd conveying roller apparatus 34, and the 3rd conveying roller apparatus 35 to the axial direction of each roller 12 is the cross section of the said outermost peripheral surface. It becomes the tangent of the circle.

  And when the 3rd conveyance roller device 35 projects the 3rd conveyance roller device 35, the 1st conveyance roller device 33, and the 2nd conveyance roller device 34 on the plane orthogonal to pipe P supported by these, The third transport roller device 35 is disposed at a position that intersects the first transport roller device 33 and the second transport roller device 34 (that is, disposed at a position that substantially intersects). When viewed three-dimensionally, the third transport roller device 35 is arranged at a twisted position with respect to the first transport roller device 33 and the second transport roller device 34, and the height position thereof is the first transport roller device 33. And between the upper and lower end portions of the second transport roller device 34, it is disposed on the side close to the lower end portion.

And the position of the 3rd conveyance roller apparatus 35 turns into a position which touches the outermost peripheral surface of the rotation locus at the time of rotating the pipe P which should be supported to the surroundings of the shaft center. The outermost peripheral surface needs to be in contact with the first transport roller device 33 and the second transport roller device 34 as well. That is, the first conveyance roller device 33 is in contact with the left side of the outermost peripheral surface, the second conveyance roller device 34 is in contact with the right side, and the third conveyance roller device 35 is in contact with the lower side.
In the case of a round pipe having a circular cross section, the outermost circumferential surface of the rotation locus coincides with the actual outer circumferential surface of the round pipe. Further, in the case of a square pipe having a substantially square cross section, the outer peripheral surface of the rotation trajectory is a rotation trajectory of the four corners of the square pipe, and a circumscribed circle of the cross sectional shape of the square pipe is a cross sectional shape. .

  In addition, the work support device 81 can be applied to a pipe having a substantially regular polygonal cross section having a corner portion equal to or more than a square, for example, other than a square pipe, and can also be applied to a columnar member instead of a pipe. ing. Basically, it can be supported as long as the angular position of the part in contact with the circumscribed circle is uniform over the entire circumference. For example, it can also be supported in a shape such as a cross-sectional star shape. It is.

  Further, the third transport roller device 35 is fixed to the housing 15 that supports the third transport roller device 35 so as to be rotatable about the axis thereof, in substantially the same manner as the first transport roller device 33 and the second transport roller device 34. The lever member 44 and a housing bracket 48 corresponding to the third transport roller device 35 are connected via a damper 53 as a shock absorber. Then, the third conveying roller device 35 is rotated around the center pin 54 together with the housing bracket 48 in a state where the fastening with the side plate 37b of the sub base 37 is released by the fixing lever 57 of the housing bracket 48 as described above. Thus, the angle of the third transport roller device 35 can be changed.

Here, when the third transport roller device 35 is rotated around the center pin 54 arranged outside the V-shape composed of the first transport roller device 33 and the second transport roller device 34 described above, the third transport roller The height position of the portion disposed between the first transport roller device 33 and the second transport roller device 34 of the device 35 can be changed up and down. At this time, the inclination of the third transport roller device 35 also changes.
As described above, the first transport roller device 33, the second transport roller device 34, and the third transport roller device 35 need to be in contact with the outermost peripheral surface having a circular cross section of the rotation locus in the rotation around the axis of the pipe P. If, for example, round pipes with different diameters are arranged between the first and second transport roller devices 33 and 34 arranged in a V shape, corresponding to the outer peripheral surface, each round pipe Is in contact with the first transport roller device 33 and the second transport roller device 34, respectively, so that the first transport roller device 33 and the second transport roller device 34 remain fixed.

Then, as described above, the third transport roller device 35 is rotationally moved and fixed to a position in contact with the round pipe whose position is determined by being in contact with the first transport roller device 33 and the second transport roller device 34. Thus, the first conveyance roller device 33, the second conveyance roller device 34, and the third conveyance roller device 35 are in contact with the outermost peripheral surface corresponding to the round pipe.
A scale plate 60 displaying an angle scale is fixed to the front surface of the side plate 37b of the sub-base 37, and a scale indicating the angle scale of the scale plate 60 corresponding to the scale plate 60 is provided in the housing 15. A pointer 61 is provided.

  The angle scale corresponds to the diameter of the cross-sectional shape that becomes the outermost peripheral surface of the rotation trajectory of the pipe described above, and the diameter is shown instead of the actual angle. Then, by determining the rotation angle of the third conveying roller device 35 so that the scale pointer 61 points to an angle scale having a value that matches the diameter of the outermost circumferential surface having a circular cross section, the outermost circumferential surface of the diameter is set. The third transport roller device 35 can be disposed so as to be in contact with each other.

Note that the value of the angle scale is determined based on, for example, the angle (fixed) formed by the first transport roller device 33 and the second transport roller device 34 and the rotation angle (variable) of the third transport roller device 35. The inscribed circles of the roller device 33, the second conveying roller device 34, and the third conveying roller device 35 are obtained, and the diameter of the inscribed circle is displayed on a scale corresponding to the angle of the third conveying roller device 35. .
Further, when the pipe P is a round pipe having a circular cross section, the outermost peripheral surface described above coincides with the outer peripheral surface of the round pipe, and the round pipe is actually the first transport roller device 33 and the second transport roller device 34. And it will be in the state which each contact | connected to the 3rd conveyance roller apparatus 35. In the case of a square pipe, depending on the rotation angle of the square pipe, the corner of the square pipe is in contact with the first conveyance roller device 33, the second conveyance roller device 34, and the third conveyance roller device 35. The roller 12 with which a corner | angular part contacts depends on the rotation angle of a square pipe.

  Here, as described above, the center position of the pipe supported by the work holder unit 30 having the first transport roller device 33 and the second transport roller device 34 does not shift from side to side as described above. When the diameter of the outermost peripheral surface of the rotation locus around the axis of the pipe is different, the position of the axis of the pipe is shifted up and down. Therefore, in order to align the axial center position with the pipe supported by the pipe processing machine, it is necessary to move the work holder part 30 up and down, but the housing base 32 as a base member for supporting the member of the work holder part 30. Is supported by the above-described square pipe 31, and the square pipe 31 is inserted into a square tube 23 provided on the end frame 22 before and after the fixed stand portion 21 so as to be movable up and down.

  The square tube 23 of the fixed stand portion 21 is provided with a height position fixing device 65 that fixes the height position of the square pipe 31, that is, the work holder portion 30 by fastening the square pipe 31 from the periphery. Yes. In addition, on the front and rear of the square tube 25 extending in the front-rear direction on the upper part of the fixed stand part 21, there is provided a vertical drive means 66 that can drive the work holder part 30 movable up and down. Further, a balancer 67 that biases the housing base 32 upward is provided between the end frame 22 of the fixed stand portion 21 and the housing base 32 of the work holder portion 30.

The height position fixing device 65, the vertical drive means 66 and the balancer 67 constitute a height adjusting means for adjusting the height of the work holder portion 30.
The height position fixing device 65 tightens the square pipe 31 of the work holder unit 30 inserted in the square pipe 23 in the state in which the axial direction is the same as that of the square pipe 23 from the surroundings. The square pipe 31 is fixed to the bolt used for tightening, and a fixing lever 69 is provided. By operating the fixing lever 69, the height position of the work holder 30 is fixed or the fixing is released. Thus, the work holder unit 30 can be moved up and down.

  The vertical drive means 66 is fixed to the front and rear end portions of the square tube 25 disposed between the front and rear end frames 22 above the fixed stand portion 21 and the upper end portion thereof is the work holder portion. The height adjustment handle 70 is provided on the lower side of the base end portion. The vertical drive means 66 is a lifting device using a feed screw, and converts the rotation of the feed screw by the height adjustment handle 70 into a linear motion to move the work holder unit 30 up and down. The rotation of the height adjustment handle 70 is subject to a load due to the load of the work holder 30, but the balancer 67 using a cylinder device is disposed between the work holder 30 and the fixed stand 21. By urging the work holder part 30 upward, it functions to cancel the load of the work holder part 30.

Thereby, when the height adjustment handle 70 is operated, the load of the work holder portion 30 does not act as a load, and the adjustment handle 70 can be rotated with a small force, thereby making it easy to adjust the height.
A height scale is displayed on the square pipe 31 of the work holder 30. That is, the height scale plate 71 on which the height scale is displayed is attached to the square pipe 31. On the other hand, the position fixing device 65 of the height adjusting means is provided with a scale pointer 72 for indicating the value of the height scale.

Further, the height scale indicates the diameter of the outermost peripheral surface of the rotation trajectory of the pipe corresponding to the angle formed by the first conveying roller device 33 and the second conveying roller device 34 arranged in the above-mentioned V shape. It has become a thing. That is, after obtaining the diameter of the outermost peripheral surface of the rotation locus of the pipe, by adjusting the height so that the value indicated by the height pointer 72 of the height scale becomes the value of the diameter, the axial position of the pipe Can be set to a predetermined position.
The height scale is set so that circles having different diameters come into contact with the first transport roller device 33 and the second roller after the opening angles of the first transport roller device 33 and the second transport roller device 34 are determined. This is obtained from the relationship between the center position of the circle and the diameter when arranged.

  According to the work support device 81, the work support devices 81 are arranged adjacent to each other regardless of the front and rear of the pipe processing machine 82 that processes the pipe P with a laser torch, for example. At this time, it is necessary to match the axial position (rotation center axis) of the pipe P processed by the pipe processing machine 82 with the axial position of the pipe P supported by the workpiece support device 81. Here, the left and right positions of the axial center positions of the pipes P supported by the work support device 81 are basically constant even in different pipes P, and the work support device 81 is connected to the pipe processing machine 82. Each of the pipes P to be supported is fixedly arranged so that the left and right positions of the axial centers are the same.

When the pipe P is processed for the first time by the pipe processing machine 82 or when processing a different type of pipe P from the pipe P that is currently being processed, the angle adjustment of the third transport roller device 35 and the work holder described above are performed. The height of the part 30 is adjusted.
At this time, the diameter of the outermost peripheral surface of the rotation locus of the pipe P to be processed is obtained. In the case of a round pipe, the outer diameter is the diameter of the outermost peripheral surface. Further, in the case of a pipe having a substantially regular polygonal cross-sectional shape such as a square pipe, a circumscribed circle of the pipe cross-sectional shape is obtained, and the diameter of the circumscribed circle is set as the diameter of the outermost peripheral surface.

Next, in each work holder unit 30, the third transport roller device is set such that the value indicated by the scale pointer 61 is the calculated diameter on the angle scale of the scale plate 60 indicating the angle of the third transport roller device 35. Change the angle of 35.
At this time, the fixing lever 57 is operated, the fastening of the housing bracket 48 to the housing base 32 is loosened, the angle of the third transport roller device 35 is changed, and then the fastening is performed again.

  Next, in the height adjusting means of each work holder unit 30, the height adjusting handle 70 is operated so that the value indicated by the scale pointer 72 becomes the above-mentioned diameter on the height scale of the height scale plate 71. At this time, the fixing lever 69 of the height position fixing device 65 is operated to loosen the height position fixing device 65, then the height adjustment handle 70 is operated, and the fixing lever 69 is operated again to operate the workpiece. The height of the holder part 30 is fixed.

By such a relatively easy operation, it is possible to cope with at least round pipes and square pipes without exchanging the work holder part 30 with another one, and the round pipes and the square pipes have different diameters. It can correspond to. Therefore, there is no need to replace a plurality of workpiece holders 30 or a part of the workpiece holders 30 depending on the types and diameters of the pipes, and the pipe processing machine can be used with the workpiece holders 30 already set in the workpiece support device 81. Thus, it is possible to cope with various workpieces to be machined, and it is not necessary to manage with a plurality of parts corresponding to the types of workpieces, so that the labor of this can be omitted.
Moreover, the cost for providing a plurality of parts corresponding to the type of workpiece or the like is not required, and the equipment cost can be reduced.

Next, when the pipe P is carried into the pipe processing machine 82, for example, the pipe P is placed on the two work holder portions 30 before and after the work support device 81 from above with the pipe P being lifted. At this time, since the first conveying roller device 33 and the second conveying roller device 34 are opened on the upper side as described above, the pipe P is connected to the first conveying roller device 33 and the second conveying roller device 34. Therefore, it is arranged so as to be sandwiched between the first transport roller device 33 and the second transport roller device 34.
The pipe P is in a state where the circumscribed circle of the cross section is in contact with the first transport roller device 33, the second transport roller device 34, and the third transport roller device 35, and the pipe P is positioned. ,
The pipe P supported by the work support device 81 is aligned with the axial position of the pipe P that is rotatably supported by the pipe processing machine 82, whether it is a round pipe or a square pipe. Will be.

Then, the pipe P supported by the work holder portions 30 before and after the work support device 81 moves toward the pipe processing machine 82 along the axial direction of the pipe P. At this time, since the moving direction of the pipe P is perpendicular to the axial direction of the first transport roller device 33, the second transport roller device 34, and the third transport roller device 35, the rollers 12 rotate, The pipe P moves smoothly along the axial direction. Therefore, it is possible to prevent the pipe P from being rubbed and scratching the surface.
The rollers 12 of the first transport roller device 33, the second transport roller device 34, and the third transport roller device 35 function as a synthetic resin coating and have a lower hardness than the pipe P. Therefore, the pipe P rotates and moves. Even when the corners of the square pipe or the like come into contact with each other at this time, the surface of the pipe P can be prevented from being damaged.

  Then, the pipe P is set on the pipe processing machine 82 side, and the processing of the pipe P is started. At this time, the pipe P rotates. In the work support device 81, the three rollers 12 are arranged so as to contact the outermost peripheral surface of the rotation locus of the pipe P. Even if it is a square pipe, it rotates smoothly, without moving the axial center position.

In addition, when the processing of the pipe P in the length range set in advance on the pipe processing machine 82 side is finished, the pipe P is moved in the axial direction in order to shift the processing range of the pipe P. In addition, when the pipe P is carried in, it is possible to obtain the same effects as when the pipe P is moved along the axial direction. And in the process of the pipe P, the process of the predetermined length range of the pipe P and the movement of the pipe P in the axial direction are repeated.
Then, when the processing of the entire pipe P is completed, the pipe P is carried out. At this time, when the pipe P is unloaded from the pipe processing machine 82, the pipe P may be returned to the workpiece support device 81 side or unloaded to the opposite side. Moreover, when carrying out to the opposite side, it is good also as what installs the workpiece | work support apparatus 81 also in the other side of the pipe processing machine 82. FIG. That is, the work support devices 81 may be disposed at both front and rear ends of the pipe processing machine 82.

  In addition, since the setting of the pipe P is complete | finished only by installing the pipe P from upper direction in the work holder part 30 without using the rotation jig which rotates integrally with the pipe P in the case of rotation, work efficiency improves. In addition, when setting the pipe P, it is possible to set the pipe P from the axial direction. Depending on the conditions of the installation location, the pipe P can be set from above or set from the axial direction. The space efficiency can be improved by relaxing the conditions of the installation location.

Further, in the work support device 81, a rotating jig or the like is not attached to the pipe P, and the pipe P rotates alone while being driven on the pipe processing machine 82 side, so that inertia of members other than the pipe P acts. Therefore, it is possible to prevent the machining accuracy from being lowered due to the twist caused by the inertia.
Further, since the pipe rotates on the third transport roller device 35 with the left and right sides surrounded by the first transport roller device 33 and the second transport roller device 34, the pipe P is a square pipe. However, it can be rotated stably without causing a large swing to the left and right during rotation and making the operation difficult.

Further, as described above, in each of the transport roller devices 33, 34, and 35, the roller 12 can be easily replaced in a short time. It should be noted that it is preferable to replace the roller in the following cases in addition to the case where the roller is worn, soiled, damaged or the like.
For example, a special roller with a surface wrapped with a polycarbonate cloth may be used to reduce scratches when the standard roller is likely to be damaged with a highly fragile pipe. In this case, it is necessary to replace the roller. Become.

In addition, if the pipe is used for processing purposes, surface finishing, etc., the pipes need to be replaced when using a special roller wrapped with felt cloth. In addition, the special roller using the felt has a very high replacement frequency because the felt is weak against friction.
In addition, for example, in the case of a mirror-finished square pipe, a special roller as described above is used to prevent scratches at the corner R portion, and the pipe needs to be replaced.

  Also, in order to prevent the pipe from being damaged, there is a compatibility between the pipe material, surface finish, and other types of pipe, and the material of the roller surface. When processing, it becomes necessary to conduct a test to find compatibility, and it is necessary to frequently change rollers and try. In this case, roller replacement is performed very frequently, and the time required for roller replacement greatly affects the test work time.

Increasing the rotation speed of the pipe during laser processing to shorten the working time will reduce the life of the roller, but will require frequent replacement of the roller, although the factory will be productive.
Further, when a roller made of a material that does not match the black skin pipe is used, the replacement frequency of the roller is increased.
In addition, when a variety of pipes such as black skin material, polishing material, and hairline are produced in a small amount, if a roller suitable for the material of the pipe is used, the roller is frequently replaced.
Also, in the case of a pipe that dislikes oil, the roller used in the processing of the oiled pipe can be used, and the roller needs to be replaced.
Thus, in the case where the roller replacement is frequently performed in the work support member 81, workability can be improved by using the above-described transport roller apparatus that can easily replace the roller as the transport roller apparatus of the work support member. Can be improved and work time can be shortened.

In the above-described embodiment, the rotational movement of the third transport roller device 35 and the lifting / lowering of the work holder unit 30 are performed manually while looking at the scale when changing the type of work, while looking at the scale. For example, it is good also as a structure operated electrically.
Furthermore, the relationship between the diameter of the outermost peripheral surface of the rotation trajectory of the pipe and the angle of the third transport roller device 35, and the relationship between the diameter and the height of the work holder unit 30 is data such as an equation or a table, When the diameter is input corresponding to the data, the rotation angle of the third transport roller device 35 and the height of the work holder unit 30 may be automatically adjusted.

  That is, the control device having the above-described data controls the rotation driving device of the third transport roller device 35 and the lifting device of the work holder unit 30, and automatically inputs the data indicating the above-mentioned diameter. The third conveying roller device 35 and the work holder unit 30 may be controlled so as to have an optimal arrangement corresponding to the diameter. At this time, an equation or a table indicating the relationship between the type of the pipe P and the diameter of the outermost peripheral surface of the rotation trajectory of the pipe P is stored in the control device as data. By inputting the type, the optimum arrangement may be automatically made.

  Also, the height of the two work holder portions 30 provided on one work support device 81 may be adjusted simultaneously by one operation by mechanical or electronic control. Further, the rotation angle of the third transport roller device 35 may be changed simultaneously by one operation with the two work holder units 30.

Moreover, when using a workpiece | work support apparatus, for example in the carrying-out side of a pipe processing machine, in each of each conveyance roller apparatus, you may arrange | position in the state which arranged two rollers.
Some of the pipes carried out from the pipe processing machine 82 are perforated. When the pipe is carried out from the pipe processing machine toward the work support device while moving in the axial direction, By entering the roller into the portion, it is possible to prevent the axial center of the pipe from moving and becoming difficult to move along the axial direction. Moreover, you may enable it to adjust suitably the space | interval of two rollers arrange | positioned side by side.

  Further, the first support member, the second support member, and the third support member, which support the pipe so as to be rotatable and movable in the axial direction, are replaced with a plate-like member (pad) that does not rotate and move instead of a roller, When the pipe is moved in the axial direction, it may be moved by sliding. That is, the first support member, the second support member, and the third support member may support the workpiece slidably in the axial direction. In this case, the contact portion of the pad with the workpiece is, for example, a belt shape. The pipe as a workpiece is rotated and moved in the axial direction by sliding with the first support member, the second support member, and the third support member. Therefore, the pad is preferably made of a member having a low friction coefficient and lower hardness than the workpiece.

10 Shaft 11 Bearing unit 12 Roller 13 Fixed support plate (support plate)
14 Detachable support plate (support plate)
15 Housing 17 Support plate fitting portion 18b Strip bolt (position holding means)
18e Bush (position holding means)
18i compression coil spring (position holding means)
32 Housing base (Rotation support means: Position adjustment means)
33 First transport roller device (first support member)
34 Second transport roller device (second support member)
35 Third transport roller device (third support member)
37 Subbase (Rotation support means: Position adjustment means)
37b Side plate (rotation support means: position adjustment means)
43 Housing (Rotation support means: Holding means: Position adjusting means)
44 Lever member (rotation support means: position adjustment means)
48 Housing bracket (holding means: position adjusting means)
51 Damper (shock absorber)
52 Damper (shock absorber)
53 Damper (shock absorber)
54 Center pin (rotation support means: position adjustment means)
57 Fixing lever (holding means: position adjusting means)
65 Height position fixing device (height adjustment means)
66 Vertical drive means (height adjustment means)
67 Balancer (height adjustment means)

Claims (4)

A work support device for supporting a long work such as a pipe so as to be rotatable and movable in an axial direction,
A first support member, a second support member, and a third support member in which a contact portion that comes into contact with the workpiece to be supported has a linear shape or a belt shape substantially parallel to a direction orthogonal to the axial direction of the workpiece; A height adjusting means for adjusting the height of the first supporting member, the second supporting member and the third supporting member;
The contact portion of the first support member and the contact portion of the second support member are arranged so as to sandwich the workpiece and are arranged in a generally V shape with the upper side opened.
The contact portion of the third support member is arranged so as to substantially intersect both the contact portion of the first support member and the contact portion of the second support member, and is supported in a state sandwiched between the first support member and the second support member. Placed under the workpiece to be
An arrangement in which the contact portion of the first support member, the contact portion of the second support member, and the contact portion of the third support member are in contact with the outermost peripheral surface of the rotation locus when the work to be supported rotates about the axis. The position adjustment means for adjusting the position of at least the third support member among the first support member, the second support member, and the third support member is provided ,
The position adjustment means includes: a rotation support means for rotatably supporting the third support member around the rotation area outside the region sandwiched between the contact portion of the first support member and the contact portion of the second support member; Holding means for holding the third support member at a rotation angle at which the contact portion of the third support member is brought into contact with the outermost peripheral surface of the rotation locus by the rotational movement of the three support members. A workpiece support device.   2. The roller according to claim 1, wherein the first support member, the second support member, and the third support member are rollers substantially parallel to a direction orthogonal to the axial direction of the workpiece to be supported. The workpiece support device described in 1. The roller is supported in a replaceable manner by a transport roller device,
The transport roller device includes a shaft, a pair of bearing units including self-aligning bearings that rotatably support the left and right end portions of the shaft, a roller that is inserted and rotated so that the shaft can be inserted and removed, and A housing in which a pair of support plates to which the bearing unit is fixed are provided facing each other;
One of the pair of support plates is attached to and removed from the housing at a use position where the roller can be used along a direction substantially orthogonal to the axial direction of the shaft. A support plate fitting portion that is movably fitted between the attachment and detachment position is provided,
The support plate fitting portion is provided with position holding means for detachably fitting to the support plate arranged at the use position and holding the support plate at the use position. The workpiece support apparatus according to claim 2. The first support member, the second support member and the third support member, any one of claims 3 that claim 1, characterized in that the damping device is provided to buffer an impact due to contact between the workpiece Item 2. The workpiece support device according to item 1.

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