JPH0620703B2 - Work posture conversion device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a work posture changing device, and more specifically, it processes a pallet holding a work with, for example, a horizontal posture for attaching and detaching the work and a machine tool. The present invention relates to a work posture conversion device capable of automatically and quickly converting into a vertical posture for performing.

BACKGROUND OF THE INVENTION In general, line production in which various kinds of machine tools are arranged along a machining line and a predetermined machining operation is sequentially performed on a workpiece conveyed to the machining line via the machine tool. The process is known. In this case, for example, in a machining line that requires a large number of different machining operations such as a cylinder head that constitutes an engine, a predetermined number of machine tools should not be interfered with each other along the machining line. Must be placed at intervals of. For this reason, the entire production line including the processing line becomes considerably long, it becomes difficult to effectively utilize the effective space in the workplace, and the inefficiency of the line production process cannot be achieved. It has been pointed out.

Therefore, an indexing table that can be rotated and indexed is prepared, and jigs that are separated from each other by a predetermined angle and are rotatable are arranged on the indexing table, and the jig is indexed while the workpiece is clamped. There has been proposed a rotary indexing device configured to rotate a table by a predetermined angle and rotate each jig itself by a desired angle (see Japanese Utility Model Publication No. 53-42847). Therefore, by arranging a plurality of machine tools radially outside the indexing table, each jig is rotated by a desired angle and clamped to the jig when the indexing table is rotated by a predetermined angle. The work being machined is indexed and positioned for each machine tool. As a result, it is possible to arrange a plurality of machine tools in a narrow space, shorten the entire machining line at once, and effectively utilize the effective space in the workplace.

However, when attempting to incorporate the rotary indexing device into a manufacturing line, the work conveyed along the manufacturing line is converted into a desired posture and placed on each jig, and further with respect to the work. After the processing is completed, the posture must be changed again and the work must be transferred to the manufacturing line.

That is, the work is conveyed on the manufacturing line in a horizontal posture in order to perform the attachment / detachment work with respect to the pallet, while the work is held in the vertical posture via the pallet during the processing work. Therefore, it is substantially necessary to perform the work of converting the work between the horizontal posture and the vertical posture between the production line and the rotary indexing device, and it is considerably frequent for the worker himself to perform this kind of posture changing work. However, it also consumes a considerable amount of time.

Therefore, various devices have been proposed in order to automatically perform the work posture changing work.
-26177 discloses the technical idea. According to this prior art, a work loader is provided which rolls a workpiece 90 degrees in a vertical plane to convert the workpiece into a horizontal posture and a vertical posture and sends the workpiece which has been transformed into the vertical posture to a machine tool. There is.

However, since the loading device rolls over the work by 90 ° and then transfers it to various machine tools by the shift means, in reality, it takes a considerable time to load the work. It is pointed out that this makes it difficult to efficiently perform the entire work operation of the work.

[Object of the Invention] The present invention has been made in order to overcome the above-mentioned inconvenience, and provides a rotary table with a pallet holder that is spaced apart from the center of rotation and that can be gradually swung in the vertical direction. , The work conveyed in a horizontal posture along the line is clamped to a pallet positioned horizontally through a pallet holder, and then the pallet holder is rocked vertically to convert the pallet to a vertical posture. In addition, the pallet is arranged on the conveying path for processing work under the rotating action of the rotating table, whereby the work can be easily and quickly converted into a predetermined posture, and an efficient line production process is possible. It is an object of the present invention to provide a work posture changing device capable of achieving the above.

[Means for Achieving the Object] In order to achieve the above object, the present invention provides a first transport path for transporting a work in a horizontal posture and a pallet to which the work is attached in parallel in the vertical direction. A work posture changing device arranged between a first conveyance path and a second conveyance path that conveys the work piece in a vertical posture along a guide rail that is arranged between the first conveyance path and the second conveyance path. A rotatable turntable, and a pallet holder that is supported so as to be vertically swingable with respect to one end of the turntable that is separated from the center of rotation and that faces the first transport path in a horizontal posture. Clamping means provided on the pallet holder to hold the pallet, and the pallet holder held in a horizontal posture and a vertical posture by being supported by the other end separated from the rotation center of the rotary table. The transform to perform And Yueta, the second form part of one of the guide rails which constitute the conveying path, characterized in that it comprises a rail member provided vertically movably on the turntable.

[Embodiment] Next, the work posture changing apparatus according to the present invention will be described in detail below with reference to preferred embodiments in relation to a rotary transfer system incorporating the same, with reference to the accompanying drawings.

1 to 3, reference numeral 10 indicates a rotary transfer system incorporating the work posture changing device according to the present embodiment. The rotary transfer system 10 is incorporated in the manufacturing line 12, and the work W transported along the manufacturing line 12 (first transport path) in the direction of the arrow is attached to the pallet 50 to have a desired posture. Is converted into a plurality of processing devices 16a to 16c, each of which is conveyed to the outside of the system 10 in a radial manner by being conveyed at a predetermined angle along an annular conveyance path (second conveyance path). After that, the posture is changed again and the product is returned to the manufacturing line 12 and conveyed to the next work position.

That is, the system 10 includes a base 18, which
A pillar 20 having a prismatic shape is erected at a substantially central portion of the. The pillar
One end of each of the lower support members 22a to 22d, which has a bent shape and projects outward, is fixed to each of the lower end side corners of the 20, and the other end of each of the lower support members 22a to 22d is fixed. Prop 20
Circular arc-shaped lower fixed rails 24a to 24d arranged on the same circumference centering on the center are supported. Upper support members 26a to 26d are fixed to the upper corners of the column 20, and the upper support members 26a to 26d are located above the lower fixed rails 24a to 24d and arranged on the same circumference. Arcuate upper fixed rails 28a to 28d are provided. Therefore, an annular conveying path 29 is formed by the lower fixed rails 24a to 24d, the lower movable rail which will be described later, and the upper fixed rails 28a to 28d and the upper movable rail which will be described later.

Further, at the upper part of the column 20, the fixed arms 30 are deviated from each other by 90 ° and protruded between the upper support members 26a to 26d.
a to 30d are retained. In this case, the fixed arm 30a
The elements constituting the pallet attaching / detaching means and the processing station, which will be described later, are attached to 30d to 30d, the details of which will be described in the pallet attaching / detaching means and the processing station.

Next, the transport means 32 is provided on the upper part of the support column 20. The transfer means 32 has a rotating body 34 rotatably mounted on the upper part of the column 20, and each of the rotating bodies 34 has movable arms 36a to 36d protruding outward at 90 ° intervals. It is provided integrally. A rotary drive source 37 is erected at a boundary portion between the movable arm 36a and the rotary body 34, and gear wheels (not shown) are axially attached to the rotary drive source 37 and the rotary body 34 in a meshed state with each other. The movable arm 36a is the upper fixed rail 2
The pair of guide bars 38a and 38b are vertically supported at the end portions of the guide bars 38a and 38b so as to project outward from the portions 8a to 28d. A rectangular body 40 is horizontally extended and held at the lower ends of the guide bars 38a, 38b, and locking members 42a are separated at both ends of the rectangular body 40 in correspondence with the width of a pallet 50 described later. 42b is fixed. The other movable arms 36b to 36d have substantially the same structure as that of the movable arm 36a described above, and the same components are designated by the same reference numerals and detailed description thereof will be omitted.

Therefore, among the fixed arms 30a to 30d, the pallet attaching / detaching means 100 is attached to the fixed arm 30a extending toward the manufacturing line 12 side.
Is provided. That is, as shown in FIG. 3, the cylinder 102 is attached to the end of the fixed arm 30a, and the connecting plate 106 is attached to the piston rod 104 extending vertically downward from the cylinder 102. As shown in FIG. 2, guide bars 108a and 108b are erected on the connecting plate 106, and the guide bars 108a and 108b are fitted to the fixed arm 30a. An arc-shaped upper rail 110, which can be arranged integrally with the upper fixed rails 28a and 28b on the same circumference, is fixed to the connecting plate 106, and cylinders 112a and 112b are provided below the upper rail 110.
The lower rail 114 that can be raised and lowered under the action of is provided in the work posture changing device 200 according to the present embodiment.

The work posture changing device 200 changes the work W conveyed in the direction of the arrow along the manufacturing line 12 into a desired posture and takes it into the annular conveyance path 29, and at the same time, the processing devices 16a to 16c.
After performing a predetermined processing by, the work W has a function of changing its posture again and sending it to the manufacturing line 12. That is, as shown in FIGS. 1 and 2, the work posture changing apparatus 200 includes a pedestal 201 disposed between the base 18 and the manufacturing line 12, and the pedestal 201 includes a rotary drive source (not shown). The rotatable turntable 202 is mounted under the driving action of. As shown in FIG. 5, the rotary table 202 has a rotation center O
The cylinders 112a and 112b described above are eccentric from the cylinders 112a and 112b by a predetermined distance, and the lower rails 114 are mounted on the piston rods 113a and 113b extending from the cylinders 112a and 112b, respectively.

As shown in FIG. 4, FIG. 5 and FIG.
Both ends of each of them project in a vertically upward direction with respect to the radial outer direction, and a pallet holder 206 is vertically swingably attached to one end side thereof via support pins 204a and 204b. The pallet holder 206 has a plate shape, and cylindrical portions 207a and 207b are provided on both sides of the pallet holder 206, and notches 208a and 208b are formed on the way of the cylindrical portions 207a and 207b, respectively. It Therefore, the cylindrical portion 207a,
Clamping means 210a, 210b capable of fixing the pallet 50 to 207b
Is provided.

That is, as shown in FIG. 8, the pallet holder 206 has a cylinder on the other side with respect to one side holding the pallet 50.
The moving plate body 212 is fixed to the piston rod 211a extending from the cylinder 211. The moving plate body 212 is oriented in a direction orthogonal to the piston rod 211a and extends to both ends of the pallet holder 206 in the longitudinal direction.
Enter the lower side of one side that holds 0. Then, positioning pins 214a and 214b are planted at the ends of the moving plate body 212 that are intruded to the lower side of the one side portion at predetermined intervals.

On the other hand, the clamping means 2 is provided at both longitudinal ends of the moving plate body 212.
The guide rods 216a and 216b constituting the guide rods 10a and 210b are implanted, and the guide rods 216a and 216b have curved guide grooves.
218a and 218b are formed. As shown in FIGS. 6A and 6B, the guide groove 218a penetrates the guide rod 216a in the diametrical direction, extends obliquely in the circumferential direction with respect to the axial direction of the guide rod 216a, and the guide groove 218a is Both ends are separated by a predetermined distance and are offset from each other by approximately 90 °. The guide groove 218b provided in the guide rod 216b has a symmetrical shape with the above-mentioned guide groove 218a.

In this case, the guide rods 216a and 216b are connected to the pallet holder 20.
6 cylindrical portions 207a, 207b and the notch 2 of the cylindrical portions 207a, 207b
It is slidably fitted integrally with locking members 220a, 220b arranged on 08a, 208b. The locking members 220a, 220b are cylindrical rotating parts 222a, 222b into which the guide rods 216a, 216b are fitted.
And the clamp part 22 that protrudes outward and the tip is bent approximately 90 °
4a and 224b are integrally formed with the rotating portions 222a and 22a.
Pins 226a and 226b are fitted in the guide grooves 218a and 218b of the 2b and the guide rods 216a and 216b.

A locking body 228 having end faces inclined at a predetermined angle is fixed to the other side of the pallet holder 206, while a plurality of rollers for guiding the pallet 50 to one side of the pallet holder 206. 230 is supported (see Fig. 5).

Further, a cylinder 232 is swingably held at the other end of the rotary table 202, and a piston rod 232a extending from the cylinder 232 is attached to one end of the pallet holding body 206.

A stopper 234 is provided on the pedestal 201 so as to incline vertically upward with respect to the outside, and the stopper 234 is engaged with a locking body 228 of the pallet holding body 206 to allow the pallet holding body to move.
Performs the function of positioning and holding the 206 in the horizontal direction.

Next, as shown in FIG. 1 to FIG. 3, the processing devices 16a are provided on the base 18 below the fixed arms 30b to 30d.
Processing stations 300a to 300c are provided corresponding to the processing stations 16 to 16c. The processing station 300 has a cylindrical support base 3
An indexing table 304 is mounted on the upper part of the support table 302 and is rotatable by a predetermined angle. In this case, the rotary drive source 306 mounted on the base 18 moves the rotary shaft 30 into the support base 302.
6a extends, and a worm (not shown) provided on the rotating shaft 306a meshes with a worm gear (not shown) axially mounted on the indexing base 304. A jig body 308 is erected on the indexing table 304 close to the support column 20 side.
A pair of guide pins 309a on the upper side and the lower side of 08,
309b and 310a, 310b are fitted together. One end of each of the guide pins 309a, 309b and 310a, 310b penetrates the jig body 308 and the support 2
While protruding toward the 0 side and integrally attached to the mounting plate 312, a lower rail 314 and an upper rail 316 are attached to the other ends of the guide pins 310a, 310b and 309a, 309b, respectively (see FIG. 2). Medium, see processing station 300c). In this case, both ends of the lower rail 314 and the upper rail 316 have guide pins 309a and 309b.
And 310a and 310b are formed in parallel with each other and oriented in the axial direction.

The jig body 308 includes guide pins 309a, 309b and 310.
cylinders 318a to 318d are mounted in proximity to a and 310b,
The claw members 322a to 322d are attached to the piston rods 320a to 320d protruding from the respective cylinders 318a to 318d in the direction opposite to the mounting plate 312. Mounting plates from cylinders 318a through 318d
The ends of the piston rods 320a to 320d protruding toward the 312 side are engaged with the mounting plate 312. Positioning pins (not shown) for positioning the pallet 50 with respect to the jig body 308 are implanted in the jig body 308. A rotary joint 324 is attached to the fixed arm 30b located above the jig main body 308, and the rotary joint 324 has a function of introducing fluid into and extracting fluid from the cylinders 318a to 318d.

The processing station 300a is configured as described above, and the other processing stations 300b to 300c are configured in the same manner as this processing station 300a, and therefore, the same components are designated by the same reference numerals. Detailed description thereof will be omitted.

On the other hand, as shown in FIG. 4, the pallet 50 which circulates along the annular transport path 29 holds the lower rail 114 on one end side which is the lower end portion when positioned vertically by the work posture changing device 200. Rotating multiple guide rollers 52
Is supported, and positioning hole portions 53a and 53b are formed with a predetermined distance therebetween. Further, a plurality of guide rollers 54, which sandwich the upper rail 110 and are rotatable, are supported at the other end of the pallet 50 which is the upper end side. Further, the cylinder 31 forming the processing stations 300a to 300c is provided on the back surface side corresponding to the side surface on which the work W of the pallet 50 is mounted.
Locking members 56a to 56d to which claw members 322a to 322d provided on 8a to 318d engage are fixed.

The rotary transfer system incorporating the work posture changing device according to the present embodiment is basically constructed as described above. Next, its operation and effect will be described.

First, in the manufacturing line 12, the work W is sequentially conveyed in a horizontal posture along the first conveyance path, and the work W reaches the work posture changing device 200. At that time, pallet holder 2
Pallet 50 is stored in advance in 06.
The 50 is horizontally oriented and positioned.

Therefore, when the work W is clamped on the pallet 50 and the cylinder 232 is driven to displace the piston rod 232a toward the production line 12, the pallet holder 206 attached to the piston rod 232a causes the support pins 204a and 204b to be supported. With the fulcrum as a fulcrum, it swings vertically upward. Therefore, if the driving of the cylinder 232 is stopped when the pallet holder 206 stands in the vertical direction, the pallet 50 held by the pallet holder 206 will have its posture with the work W facing the support column 20 side. It will be converted 90 degrees. Further, when the rotary table 202 is rotated 180 ° under the driving action of a rotary drive source (not shown), the pallet holder 206 supported at a position displaced from the rotation center of the rotary table 202 rotates 180 ° in its direction. Together with this, they are positioned close to the column 20 side (see FIGS. 3 and 4). In this case, the turntable 202 has a lower rail 114
The lower rail 114 is attached to the cylinder 112.
If the lower rail 114 is displaced vertically downward in advance under the action of a and 112b, it will not be referred to as the lower fixed rails 24a and 24b when the lower rail 114 rotates integrally with the rotary table 202.

Next, the pallet attaching / detaching means 100 is driven. That is,
When the cylinders 112a, 112b provided on the rotary table 202 are driven to vertically displace the piston rods 113a, 113b, the lower rails 114 mounted on the pistons 113a, 113b rise and the lower rails 114 are palletized. It is nipped by a plurality of guide rollers 52 supported by 50. On the other hand, when the cylinder 102 attached to the fixed arm 30a is driven to displace the piston rod 104 in the vertically downward direction, the connecting plate 106 supported by this is lowered under the guiding action of the guide bars 108a and 108b. The upper rail 110 attached to the connecting plate 106 is a pallet.
It is sandwiched by a plurality of guide rollers 54 of 50. As a result, the lower rail 114 and the upper rail 110 are circumferentially arranged with the lower fixed rails 24a, 24b and the upper fixed rails 28a, 28b, respectively, and the pallet 50 is the second transport path of the system 10,
That is, it is arranged on the annular transport path 29.

As described above, in the work posture changing device 200, the work W conveyed along the manufacturing line 12 is once directed vertically in the vertical direction via the pallet holder 206, and then is rotated 180 ° under the rotating action of the rotary table 202. It is rotated and disposed on the annular transport path 29. Therefore, as compared with the conventional one in which the work W is rolled over 90 ° in the vertical plane and then sent out to the machining work transfer path, the work W is sent out to the annular transfer path 29 efficiently and accurately. The effect that is possible is obtained.

On the other hand, under the driving action of the pallet attaching / detaching means 100, the upper rail 1
Movable arm 36 that constitutes transport means 32 when lowering 10
The rectangular body 40 supported by a is lowered integrally with, for example, a holder (not shown) provided on the connecting plate 106, and the locking members 42a and 42b attached to the rectangular body 40 are palletized. Clamp the upper side of.

Therefore, the cylinder 211 is driven to drive the clamp means 210a, 210a.
The fixing action of the pallet 50 by b is released. That is,
As shown in FIG. 8, when the piston rod 211a is displaced vertically downward under the driving action of the cylinder 211, the moving plate 212 attached to the piston rod 211a descends. Therefore, the guide rods 216a and 216b planted in the moving plate body 212 slide and displace in the respective cylindrical portions 207a and 207b of the pallet holder 206. At this time, as shown in FIG. 6a, the guide rod 216a is formed with guide grooves 218a which penetrate the guide rod 216a in the diametrical direction and whose both ends are deviated from each other by approximately 90 °. A pin 226a is integrally fitted to 220a. Therefore, when the guide rod 216a is displaced in the arrow direction in FIG. 6a, the locking member 220a swings in the arrow direction by about 90 ° under the guide action of the guide groove 218a and the pin 226a. Therefore, the clamp part
The 224a swings from a position perpendicular to the pallet holder 206 to a position parallel to the pallet holder 206 (see FIG. 6b), and is separated from one side of the pallet 50. On the other hand, the guide rod 216b has a guide groove symmetric with the guide groove 218a of the guide rod 216a.
218b is formed. Therefore, when the moving plate body 212 moves vertically downward, the locking member 220b swings in the direction away from the pallet 50 side under the guiding action of the guide groove 218b and the pin 226b.

Further, as the moving plate body 212 descends, the positioning pins 214a and 214b are separated from the holes 53a and 53b of the pallet 50. As a result, the pallet 50 is released from the holding action of the pallet holder 206 and is supported by the lower rail 114 and the upper rail 110.

Next, the rotation drive source 37 that constitutes the transport means 32 is driven.
Therefore, the rotator 34 rotates in the direction of the arrow in FIG. 2, and the pallet 50 held by the movable arm 36a is guided by the guide rollers 52 and 54 along the lower rail 114 and the upper rail 110. Displaced from lower fixed rail 24b and upper fixed rail 28b to lower rail 314 and upper rail
Up to 316. In this way, when the movable arm 36a is displaced by 90 ° from the work posture changing device 200, that is, when it reaches the machining station 300a, the driving of the rotary drive source 37 is stopped.

In the processing station 300a, first, the cylinders 318a to 318d are driven, and the piston rods 320a to 320d are displaced integrally with the claw members 322a to 322d toward the mounting plate 312 side. Therefore, the claw members 322a to 322d are engaged with the locking members 56a to 56d provided on the back surface side of the pallet 50 and pulled to the mounting plate 312 side, and the pallet 50 is attached to the jig body 308. This jig body comes in contact with the positioning pin (not shown).
Positioned and held with respect to 308. At that time, the pallet 5
Since 0 is displaced to the jig main body 308 side, the pallet 50 comes to be released from the locking members 42a and 42b forming the transporting means 32.

Further, the mounting plate 312 moves toward the support column 20 side by driving the cylinders 318a to 318d, and the guide pins 309a, 309b and 310a, 31 having one end fixed to the mounting plate 312.
Similarly, 0b is displaced toward the column 20 side. Therefore, the lower rails 314 and the upper rails 316 held by the guide pins 309a, 309b and 310a, 310b are radially inward (the column 20).
Side) will be displaced.

Next, the rotary drive source 306 provided on the base 18 is driven to rotate the rotary shaft 306a in a predetermined direction.
The indexing base 304 rotates by a predetermined angle with respect to the support base 302 via a worm (not shown) provided on 6a and a worm gear that meshes with the worm. As a result, the pallet 50 positioned and held by the jig body 308 is indexed at a predetermined angular position with respect to the processing device 16a. Since the lower rail 314 and the upper rail 316 are displaced inward in the radial direction during the indexing work, the lower rail 314 and the upper rail 316 are displaced.
And the lower fixed rails 24b and 24c and the upper fixed rail 28
It does not interfere with b and 28c.

After the predetermined working operation for the work W is completed, the rotary drive source 306 is driven to rotate the indexing base 304 in the opposite direction to position the jig body 308 at the attachment / detachment angular position of the pallet 50. Further, the cylinders 318a to 318d are driven to drive the claw members.
When 322a to 322d are displaced to the side opposite to the mounting plate 312,
The mounting plate 312 is displaced in the direction away from the support column 20, and the lower rail 314 and the upper rail 316 are displaced together with the pallet 50 in the radial outward direction (direction away from the support column 20). Therefore, the lower rail 314 is fixed to the lower fixed rails 24b and 24c.
And the upper rail 316 is fixed to the upper fixed rails 28b, 28
In conformity with c, an annular transport path 29 will be formed. Further, since the pallet 50 moves radially outward, the upper side of the pallet 50 fits between the locking members 42a and 42b provided on the movable arm 36a.

Next, when the rotary drive source 37 is driven to rotate the rotary body 34 by 90 °, the pallet 50 reaches the processing station 300b integrally with the movable arm 36a. Therefore, similarly to the above-described processing station 300a, a predetermined processing operation is performed on the work W held on the pallet 50 at the processing station 300b via the processing device 16b.

Further, the pallet 50 is transported to the processing station 300c under the driving action of the transport means 32, subjected to predetermined processing by the processing device 16c, and then transported to the work posture changing device 200. In the work posture changing device 200, the pallet holder 206
Stands upright, and holds the pallet 50 by the pallet holder 206. That is, when the cylinder 211 is driven to displace the piston rod 211a to the cylinder 211 side, the moving plate member attached to the piston rod 211a is moved.
212 moves to the pallet holder 206 side. Therefore, the guide rods 216a, 216 are planted at both ends of the moving plate body 212.
The b is slidably displaced vertically in the respective cylindrical portions 207a and 207b of the pallet holder 206. Therefore, the guide rod 216a,
Pins 226a, 22 that fit into guide grooves 218a, 218b of 216b
The locking members 220a and 220b swing toward the pallet 50 side via the 6b, and the clamp portions 224a and 224b press and hold the pallet 50 on the pallet holder 206. Positioning pins 214a and 214b are implanted in the moving plate body 212, and
2 is moved upward, so that the respective positioning pins 214a, 214b
Fits into the holes 53a and 53b of the pallet 50. As a result, the pallet 50 is accurately and firmly held by the pallet holder 206.

A cylinder 112 that constitutes the pallet attaching / detaching means 100.
While driving the a and 112b to lower the lower rail 114, the upper rail 110 is raised by the driving action of the cylinder 102 provided on the fixed arm 30a, and the lower rail 114 and the upper rail 110 are moved to the pallet 50. Away from. At that time, the locking members 42a and 42b are disengaged from the pallet 50 by raising the square body 40 via the upper rail 110.

In this manner, while the pallet 50 is held only by the pallet holder 206, the rotary base 202 is rotated 180 ° under the driving action of the rotary drive source (not shown), and the pallet holder 206 is further driven under the driving action of the cylinder 232. Rock vertically. Therefore, the stopper 2 provided on the frame 201
The locking body 228 of the pallet holder 206 contacts the 34 and the pallet
The 50 is oriented horizontally. Next, the work W is removed from the pallet 50, and the work W is sent to the next work position along the manufacturing line 12.

By the way, when the movable arm 36a is displaced to the processing station 300a, the movable arm 36d reaches the work posture changing device 200. Then, the other pallet 50 supported by the movable arm 30d is held by the pallet holder 206 to perform the posture changing work, and then the work W attached to the pallet 50 is sent to the manufacturing line 12. At the same time, the work of mounting a new work W on the pallet 50 is performed. That is, the movable arms 36a to 36d hold the pallets 50, respectively, and of course, the predetermined machining operations for the respective works W simultaneously proceed under the action of the processing devices 16a to 16c in the processing stations 300a to 300c. Is.

[Advantages of the Invention] As described above, according to the present invention, a rotatable rotary table is provided between the first transport path and the second transport path, and the rotary table is separated from the rotation center thereof. In addition, the pallet holder that is swingable in the vertical direction is supported. Therefore, the work conveyed in the horizontal posture along the first conveying path is clamped on the pallet mounted on the pallet holder, and then the rotary table is rotated at a predetermined angle while the pallet holder is erected. Just rotate it,
The work is converted into a vertical posture integrally with the pallet and is arranged on the second transport path. Therefore, the work posture changing work can be performed in a short time, and the efficiency of the entire working work can be easily achieved.

Moreover, the second conveyance path is an annular conveyance path that is substantially divided into a plurality of arcuate guide rails that are vertically arranged side by side, and the rotary table that constitutes the work posture conversion device has one of the guides. A rail is provided so that it can move up and down. Therefore, by disposing the guide rail at a predetermined retracted position, it is possible to prevent the guide rail from interfering with other guide rails when the turntable is rotated.

Further, the pallet holder is provided with a clamp means for holding the pallet, and the clamp means is provided with a pair of rods which can advance and retreat under the action of a single actuator and a guide groove formed in the rod. It is composed of a locking member that swings to press and hold the pallet and a positioning member that engages with the pallet under the action of the actuator. Therefore, there is an advantage that the pallet can be held accurately and firmly with a simple structure.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to this embodiment,
It goes without saying that various improvements and design changes can be made without departing from the scope of the present invention.

[Brief description of drawings]

1 is a schematic configuration perspective view of a rotary transfer system incorporating a work posture changing device according to the present invention, FIG. 2 is a schematic plan view of the system, FIG. 3 is a schematic side sectional view of the system, FIG. 4 is a schematic perspective view of the device of the present invention, FIG. 5 is a partial cross-sectional side view of the device shown in FIG. 4, and FIGS. 6a and 6b are operation explanatory views of the clamping means constituting the device of the present invention. FIG. 8 is a perspective explanatory view of the device of the present invention, and FIG. 8 is a perspective explanatory view of a movable plate member constituting the device of the present invention. 10 …… Rotary transfer system 12 …… Manufacturing line 16a to 16c …… Processing equipment, 29 …… Conveying path 32 …… Conveying means, 50 …… Pallet 100 …… Pallet attaching / detaching means 200 …… Work posture changing device, 202 ...... Rotary table 206 …… Pallet holder 210a, 210b …… Clamping means, 211 …… Cylinders 214a, 214b …… Positioning pins 216a, 216b …… Guide rod 220a, 220b …… Locking member, 232 …… Cylinder 300a ~ 300c …… Processing station

Claims (3)

[Claims] 1. A first transport path for transporting a work in a horizontal posture, and a second transport path for transporting a pallet to which the work is attached in a vertical posture along guide rails provided in parallel with each other in a vertical direction. A work posture changing device arranged between the first conveyance path and the second conveyance path; and a rotatable rotation table arranged between the first conveyance path and the second conveyance path; A pallet holder that is swingably supported in the vertical direction with respect to one of the separated ends and that faces the first transport path in a horizontal posture, and that is provided on the pallet holder and that holds the pallet. Clamping means, an actuator that is supported by the other end of the rotary table that is separated from the center of rotation of the pallet holder to change the posture of the pallet holder between a horizontal posture and a vertical posture, and one that constitutes the second transport path. Guide of Form part of Lumpur, wherein the rail member provided vertically movably to the turntable, the workpiece attitude changing unit, characterized in that it comprises a. 2. The apparatus according to claim 1, wherein the clamp means includes two or more rods that are integrally movable back and forth under the action of a single actuator, a guide groove formed in the rod, and the rod. And a pin which is inserted into the guide groove is fitted, and the pin is pushed and held by rotating the guide groove and the pin under the guiding action of the rod as the rod moves forward and backward. A work posture changing device comprising: a stop member. 3. The apparatus according to claim 2, wherein the single actuator is a cylinder, and a moving plate is attached to a piston rod extending from the cylinder, and the pallet holding member is attached to the moving plate. A work posture changing device comprising: a pair of rods slidably fitted to both sides of a body; and a positioning pin fitted to a positioning hole of the pallet.