JP2015078049A - Transport device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent collision of a work base with a simple structure.SOLUTION: A transport device 1 is configured so that work bases WB on which a workpiece W is mounted are sequentially transported from an upstream side to a downstream side in a transport direction of a transport conveyor 2, and magnets 53 are disposed on one side part 52 and the other side part 51 in the transport direction of the work bases WB, for acting resiliency of the magnets 53 between the adjacent work bases WB in the transport direction, for maintaining distance between the work bases WB by predetermined distance or more.

Description

  The present invention relates to a transport device that transports a transport object.

  Patent Document 1 discloses a transport device that transports a workpiece, which is a transport object, by a belt-type conveyor.

JP-A-6-191616

  This type of transport device is also employed in an assembly line for an automatic transmission for a vehicle. For example, a work base on which components (workpieces) of an automatic transmission are placed is transported by a transport conveyor, 2. Description of the Related Art A conveying device that supplies a component assembly process is known.

FIG. 5 is a schematic configuration diagram of a transport apparatus according to a conventional example.
A conveying device 100 employed in an assembly line of an automatic transmission includes a conveying conveyor 101 in which a plurality of rollers 103 supported rotatably between a pair of frames 102 and 102 are provided at predetermined intervals in the longitudinal direction. ing.
On this conveyor 101, a work base WB (WB1 to WB4) on which components (workpieces) of an automatic transmission are placed is placed across a plurality of rollers 103. By positioning the downstream side in the transport direction of the transport conveyor 101 below the upstream side and tilting the transport conveyor 101 in the longitudinal direction, the work base WB is directed from the upstream side to the downstream side of the transport conveyor 101. It is designed to move by its own weight.

  In this transport apparatus 100, since the work base WB is sequentially transported on the transport conveyor 101, the work base WB is newly transported to a place where the work base WB tends to stay, such as before the assembly process or before the lifting conveyor 107. In order to prevent the work base WB from coming into contact (collision) with the staying work base WB, a stopper 106 (soaking device) is provided.

However, since there are a plurality of places on the transport conveyor 101 where the work base WB is likely to stay, in order to prevent contact (collision) between the work bases WB in the transport conveyor 101, the stopper 106 and the stopper 106 are provided. Multiple mechanisms for driving are required, which increases the cost of the assembly line.
In addition, since the supply timing of the work base WB to each assembling process is different for each assembling process, it is necessary to drive each of the stoppers 106 provided in the preceding stage of each assembling process independently. This complicates the drive control of each stopper 106.

  Therefore, there is a demand for a transport apparatus that can prevent a transport target from colliding with a simpler configuration.

The present invention is a transport device in which a plurality of work bases on which a work is placed are transported continuously from the upstream side to the downstream side in the transport direction of the transport conveyor,
Conveying with a configuration in which magnets are provided on one side and the other side in the conveying direction of the work base so that the repulsive force of the magnet acts between the work bases adjacent in the conveying direction. The device.

According to the present invention, since the repulsive force of the magnet acts between the work bases adjacent in the transport direction, collision between the work bases is prevented.
Therefore, the work bases can be prevented from colliding with a simple configuration in which the work bases are provided with magnets.

It is a figure explaining the conveying apparatus concerning embodiment. It is a figure explaining the stopper mechanism provided in the upper conveyance conveyor. It is a figure explaining operation | movement of a stopper mechanism. It is a figure explaining the conveyance end position side of a lower conveyance conveyor. It is a schematic block diagram of the conveyance conveyor which concerns on a prior art example.

FIG. 1 is a schematic configuration diagram when the transport device 1 according to the embodiment is applied to an assembly line of an automatic transmission. FIG. 1A is a schematic configuration diagram of the transport device 1, and FIG. AA sectional view in (), (c) is a perspective view of the work base WB.
In FIG. 1, a part of the conveyor 2 </ b> A and the elevating conveyors 6 and 7 is shown in cross section, and the rollers 21 and the work base WB located in the sections shown in these cross sections are also shown in cross section.

As shown in FIG. 1, the transport conveyor 2 of the transport apparatus 1 includes an upper transport conveyor 2A that transports a work base WB on which a workpiece W is placed, and a lower transport conveyor installed below the transport conveyor 2A. 2B, the work base WB that has reached the transfer end position of the transfer conveyor 2A is returned to the transfer start position (right side in the figure) of the transfer conveyor 2A by the transfer conveyor 2B.
Here, in the transfer conveyors 2A and 2B, the downstream end portion in the transfer direction of the transfer conveyors 2A and 2B is the transfer end position of the work base WB, and the upstream start end portion is the work base WB. This is the transfer start position.

  Note that the upper conveyor 2A and the lower conveyor 2B have the same configuration, and in the following description, the conveyor 2A and the conveyor 2B are simply conveyed if they are not particularly distinguished. Indicated as conveyor 2.

The conveyor 2 includes a cylindrical roller 21, a rotating shaft 22 that rotatably supports the roller 21, and side covers 23 and 24 that support one end and the other end of the rotating shaft 22.
The side covers 23 and 24 are plate-like members having a predetermined length in the conveying direction of the work base WB, and between these side covers 23 and 24, the roller 21 rotatably supported by the rotary shaft 22 is A plurality of them are provided at equal intervals along the longitudinal direction of the side covers 23 and 24.
In this state, the rotation shafts 22 of the rollers 21 are aligned in a direction orthogonal to the conveyance direction of the work base WB, and each of the rotation shafts 22 is on a common axis line X1 when viewed from the conveyance direction side. positioned.

As shown in FIG. 1B, the roller 21 has an upper surface 21 a serving as a mounting surface for the work base WB located below the upper ends 23 a and 24 a of the side covers 23 and 24. The upper ends 23a, 24a of the side covers 23, 24 are positioned on the side of the work base WB placed on the side.
Therefore, the work base WB that moves in the transport direction on the transport conveyor 2 is prevented from dropping from both sides of the transport conveyor 2.

  The transport conveyor 2 is located on the upstream side (transport start position side) in the transport direction above the downstream side (transport end position side), and the work base WB placed on the transport conveyor 2 is caused by its own weight. The conveyor 2 can move from the upstream side toward the downstream side.

As shown in FIG. 1C, the work base WB is a plate-like member having a rectangular shape in a top view, and the side portions 51 and 52 on one side and the other side in the transport direction of the transport conveyor 2 are A magnet 53 is provided. The side parts 51 and 52 of the work base WB are flat surfaces perpendicular to the conveying direction of the work base WB. In the side parts 51 and 52, a plurality of magnets 53 are provided at equal intervals in the longitudinal direction. ing.
In the embodiment, all the magnets 53 provided on the work base WB have the same polarity (for example, N pole), and the work bases WB transported by the transport conveyor 2 are arranged on the side portions 51 and 52. The repulsive force of the provided magnets 53 prevents them from colliding with each other.

FIG. 2 is a view for explaining the stopper mechanism 8 provided at the transfer end position of the transfer conveyor 2A. FIG. 2A is a plan view of the transfer end position side of the transfer conveyor 2A and the lifting conveyor 6 as viewed from above. (B) is an AA sectional view in (a), and (c) is a BB sectional view in (a). In FIG. 2A, for convenience of explanation, the transport conveyor 2A and the lifting conveyor 6 are shown separated from each other in the transport direction of the work base WB (the left-right direction in the figure). Only WB is shown in cross section.
FIGS. 3A and 3B are diagrams for explaining the operation of the stopper mechanism 8. FIGS. 3A and 3B show the stopper plate 83 of the stopper mechanism 8 at a position at which the movement of the work base WB to the lifting conveyor 6 side is prevented. (C) and (d) are diagrams showing a state in which the stopper plate 83 is pushed by the operation plate 89 of the elevating conveyor 6 and rotated around the support shaft 82. (E) And (f) is a figure which shows the state by which the stopper board 83 of the stopper mechanism 8 is arrange | positioned in the position which enables the movement to the raising / lowering conveyor 6 side of work base WB.

  As shown in FIG. 1, an elevating conveyor 6 is provided on the extension of the transfer end position of the transfer conveyor 2A in the transfer apparatus 1, and the work base WB that has reached the transfer end position of the transfer conveyor 2A is moved up and down. By the conveyor 6, it conveys to the conveyance start position of the conveyance conveyor 2B located under the conveyance conveyor 2A.

As shown in FIG. 2B, the elevating conveyor 6 also has a basic configuration in which a plurality of rollers 61 are rotatably supported between a pair of side covers 63 and 64. A shaft portion 91 of the air cylinder 9 is connected to the lower portion of 6.
The shaft portion 91 is configured to move back and forth in the vertical direction in the drawing, and the elevating conveyor 6 connected to the upper end of the shaft portion 91 has a height position aligned with the transport end position of the transport conveyor 2A, and It moves between a height position that matches the transfer start position of the transfer conveyor 2B.

  In the embodiment, the elevating conveyor 6 has a length L1 on which the work base WB can be placed. The elevating conveyor 6 is moved from the conveying conveyor 2A side to the end opposite to the conveying conveyor 2A. A stopper 65 for preventing the work base WB from falling off is provided over the left and right side covers 63 and 64.

  In the embodiment, when the elevating conveyor 6 is arranged at a height position aligned with the transfer end position of the transfer conveyor 2A, the movement of the work base WB is prevented by a stopper mechanism 8 (see FIG. 2A) described later. Is released, and the work base WB can move from the transfer end position of the transfer conveyor 2A toward the lift conveyor 6.

As shown in FIG. 2, the stopper mechanism 8 provided at the end of the transport conveyor 2A on the transport end position side will be described.
The stopper mechanism 8 includes a stopper plate 83 rotatably supported by a support shaft 82 provided on the conveyor 2A, and an operation plate 89 provided so as to protrude from the lifting conveyor 6 toward the conveyor 2A. .

The support shaft 82 of the stopper plate 83 protrudes in the transport direction of the transport conveyor 2A from the center in the longitudinal direction of the support plate 81 spanned between the left and right side covers 23, 24 of the transport conveyor 2A.
As shown in FIG. 2C, the stopper plate 83 is a plate-like member having a rectangular shape when viewed from the downstream side in the transport direction, and a midway position in the longitudinal direction is supported by the support shaft 82. Yes.

  The stopper plate 83 has an angular position at which one end 83a in the longitudinal direction protrudes above the upper surface 21a of the roller 21 to prevent the work base WB from moving toward the lift conveyor 6 (blocking position: FIG. 3). (See (a) of FIG. 3), and an angular position that allows the work base WB to move toward the lifting conveyor 6 by being positioned below the upper surface 21a of the roller 21 (permitted position: see FIG. It is possible to move between.

  The stopper plate 83 is held at the above-described blocking position (see FIG. 2C and FIG. 3A) by a coil spring (not shown). In this state, the stopper plate 83 is vertical. It arrange | positions in the state inclined at predetermined angle (theta) with respect to the line VL, and has located the edge part 83b of the other side in a longitudinal direction below 2 A of conveyors.

In the embodiment, when the elevating conveyor 6 rises toward a height position aligned with the conveyance end position of the conveying conveyor 2A, the operation plate 89 provided on the elevating conveyor 6 also rises, and the other of the stopper plates 83 The end 83b on the side is pushed upward to rotate the stopper plate 83 around the support shaft 82 (see FIG. 3).
At this time, if the stopper plate 83 is positioned along the vertical line VL, the contact point between the operation plate 89 and the end 83b and the support shaft 82 are positioned on the same vertical line VL. The stopper plate 83 cannot rotate in the circumferential direction around the support shaft 82.
Therefore, in the embodiment, when the elevating conveyor 6 is not at a height position aligned with the transfer end position of the transfer conveyor 2A, the stopper plate 83 is moved by a coil spring (not shown) to a predetermined angle θ with respect to the vertical line VL. It keeps in an inclined state.

Auxiliary rollers 88, 88 are provided on both sides of the stopper plate 83 when the transport conveyor 2 </ b> A is viewed from the lifting conveyor 6 side. The auxiliary rollers 88 are supported to be rotatable around an axis parallel to the axis X1 of the roller 21 described above.
The rotary shafts 87 and 87 that rotatably support the auxiliary rollers 88 and 88 are supported by support walls 86 and 86 (see FIG. 2C) provided on both sides of the bottom plates 85 and 85, respectively. .

  In the embodiment, the stopper plate 83 is provided at a position protruding from the end of the conveyor 2 </ b> A toward the lifting conveyor 6, and a gap is generated between the conveyor 2 </ b> A and the lifting conveyor 6. Therefore, auxiliary rollers 88 and 88 are provided on both sides of the stopper plate 83 in order to prevent the work base WB moving from the transfer conveyor 2 </ b> A toward the elevating conveyor 6 from dropping from the gap.

  FIG. 4 is a diagram for explaining the transport end position side of the transport conveyor 2B, and (a) is a plan view of the transport end position side of the transport conveyor 2B and the lifting conveyor 7 as viewed from above, (b). These are AA sectional drawing in (a). In FIG. 4A, the work base WB is shown in cross section for convenience of explanation.

  A lift conveyor 7 is also provided on the extension of the transfer end position of the transfer conveyor 2B, and the work base WB that has reached the transfer end position of the transfer conveyor 2B is positioned above the transfer conveyor 2B by the lift conveyor 7. It is transported to the transport start position of the transport conveyor 2A.

As shown in FIG. 4, the elevating conveyor 7 also has a basic configuration in which a plurality of rollers 71 are rotatably supported between a pair of side covers 73, 74. The shaft 91 (see FIG. 1) of the air cylinder 9 is connected.
The shaft portion 91 also moves back and forth in the vertical direction in the figure, and the lifting conveyor 7 connected to the upper end of the shaft portion 91 has a height position that matches the transport start position of the transport conveyor 2A. , And the height position aligned with the transfer end position of the transfer conveyor 2B.

  In the embodiment, the elevating conveyor 7 has a length L1 on which the work base WB can be placed, and the elevating conveyor 7 is moved from the conveying conveyor 2B side to the end opposite to the conveying conveyor 2B. A stopper 75 for preventing the work base WB from falling off is provided over the left and right side covers 73 and 74.

  In the embodiment, when the elevating conveyor 7 is arranged at a height position aligned with the conveyance end position of the conveying conveyor 2B, the movement prevention of the work base WB by the stopper 77 provided in the elevating conveyor 7 is released, The work base WB can move from the transfer end position of the transfer conveyor 2B toward the lift conveyor 7.

Here, the stopper 77 provided in the raising / lowering conveyor 7 is demonstrated.
In the elevating conveyor 7, the stopper 77 is provided at the end on the conveyor 2 </ b> B side. The stopper 77 is a plate-like member provided to extend downward from the longitudinal center portion of the support plate 76 spanned between the left and right side covers 73 and 74 of the elevating conveyor 7, and the work base WB. The width W2 is narrower than the width W1 (see FIG. 4B).

  The stopper 77 has a length L2 at which the lower end 77b side extends over the extension of the transfer end position of the transfer conveyor 2B when the elevating conveyor 7 is arranged at a height position aligned with the transfer start position of the transfer conveyor 2A. (See (a) of FIG. 1).

  Therefore, the stopper 77 is positioned on the extension of the transport end position of the transport conveyor 2B until the lifting conveyor 7 is arranged at a height position aligned with the transport end position of the transport conveyor 2B. The work base WB that has reached the conveyance end position of the conveyor 2B is prevented by the stopper 77 from entering the lifting conveyor 7 side.

  In the embodiment, since the elevating conveyor 7 moves back and forth in the vertical direction in the figure, by providing the stopper 77, when the elevating conveyor 7 is not located on the extension of the conveying conveyor 2B, the conveyance of the conveying conveyor 2B is completed. The work base WB that has reached the position is prevented from falling to the lifting conveyor 7 side.

Hereinafter, operation | movement of the conveying apparatus 1 concerning embodiment is demonstrated.
In the transport apparatus 1, the upper transport conveyor 2 is placed at the transport start position on the upper surface because the downstream transport end position is lower than the upstream transport start position. The work base WB on which W is placed moves toward the downstream conveyance end position by its own weight (see the arrow in FIG. 1A).

Here, in the assembly line of the automatic transmission, the plurality of work bases WB are sequentially moved on the transport conveyor 2 toward the transport end position on the downstream side.
Therefore, if the work base WB is stopped at the transfer end position, the new work base transferred by the transfer conveyor 2 approaches the stopped work base WB.
Here, in the work base WB, magnets 53 having the same polarity are provided on one side 51 and the other side 52 in the transport direction by the transport conveyor 2, so that the work bases WB adjacent in the transport direction are adjacent to each other. When approaching a predetermined distance, the repulsive force of the magnet 53 acts on both work bases WB.

  Then, since the contact between the work bases WB in the middle of transportation is blocked by the repulsive force of the magnet 53, the work bases WB transported on the transport conveyor 2 are transported in a state where mutual contact is blocked. It will move towards the end position.

Here, a stopper mechanism 8 is provided at the transfer end position (end) of the transfer conveyor 2A, and the stopper plate 83 of the stopper mechanism 8 has a height at which the elevating conveyor 6 is aligned with the transfer end position of the transfer conveyor 2A. When not disposed at a position, one end 83a in the longitudinal direction protrudes above the upper surface 21a of the roller 21 on which the work base WB is placed ((a) of FIG. 3). reference).
Therefore, the work base WB that has reached the conveyance end position is in a state where the movement toward the lifting conveyor 6 side is blocked by the stopper plate 83.

When the operation plate 89 of the elevating conveyor 6 rises due to the elevating of the elevating conveyor 6 to the transport conveyor 2A side, the operation plate 89 comes into contact with the other end 83b of the stopper plate 83 ((b in FIG. 3). )reference). When the operation plate 89 further rises from this state, the other end 83b of the stopper plate 83 is pushed upward to rotate the stopper plate 83 around the support shaft 82 (see FIG. 3B).
Then, when the elevating conveyor 6 reaches a height position that aligns with the conveyance end position of the conveyor 2A, the end 83a on one side of the operation plate 89 is positioned below the upper surface 21a of the roller 21 and the workpiece is moved. The base WB can be moved (see FIG. 3C).

As a result, the restriction on the movement of the work base WB at the transfer end position of the transfer conveyor 2 </ b> A to the lift conveyor 6 side is released, so that the work base WB moves to the lift conveyor 6 side and is placed on the lift conveyor 6. Will be.
In this state, there is a magnet 53 between the work base WB placed on the lifting conveyor 6 and the work base WB located on the upstream side of the work base WB (work base WB located on the transfer conveyor 2A). Therefore, another work base WB located on the transport conveyor 2A is prevented from moving to the lifting conveyor 6 side.

And if the raising / lowering conveyor 6 moves toward the downward direction of the conveyance conveyor 2B side, the operation board 89 will also move toward the downward direction of the conveyance conveyor 2B side.
Then, a biasing force of a coil spring (not shown) is applied to the stopper plate 83 with which the operation plate 89 abuts, so that the stopper plate 83 follows the movement of the operation plate 89 and moves around the support shaft 82. Rotate.

As a result, the stopper plate 83 rotates around the support shaft 82 as the elevating conveyor 6 descends (moves the operation plate 89), so that one end 83a of the stopper plate 83 becomes the upper surface 21a of the roller 21. It will protrude upwards.
When the operation plate 89 reaches a predetermined position on the conveyor 2B side, the engagement between the operation plate 89 and the end 83b on the other side of the stopper plate 83 is released, and the stopper plate 83 is a coil spring (not shown). Thus, the angular position at the time when the engagement is released is held.
Therefore, even after the elevating conveyor 6 moves below the conveyor 2A, the end 83a on one side of the stopper plate 83 is held at a position protruding above the upper surface 21a of the roller 21, so that the conveyor 2A The new work base WB that has reached the transfer end position is prevented from falling to the lifting conveyor 6 side.

Subsequently, the work base WB transferred to the transfer start position of the transfer conveyor 2B by the elevating conveyor 6 moves on the transfer conveyor 2B toward the transfer end position (right side in FIG. 1A) by its own weight. Become.
When the work base WB reaches the transport end position of the transport conveyor 2B, if the lift conveyor 7 is positioned on the extension of the transport end position, the work base WB moves to the lift conveyor 7 and is placed. Will be.

  When the lifting conveyor 7 is not located on the extension of the transfer end position, a plate-like stopper 77 extending downward from the lifting conveyor 7 is positioned on the extension of the transfer end position of the transfer conveyor 2B. The work base WB is prevented from moving toward the lifting conveyor 7 by the stopper 77.

  In this state, when a new work base WB is transported from the upstream side of the transport conveyor 2B, the repulsive force of the magnet 53 acts on both work bases WB when the work bases WB approach each other to a predetermined distance. Therefore, the contact between the work base WB whose movement is blocked by the stopper 77 and the newly transferred work base WB is blocked by the repulsive force of the magnet 53.

Thereafter, when the elevating conveyor 7 is lowered to a height position aligned with the transfer end position of the transfer conveyor 2B, the movement prevention of the work base WB by the stopper 77 is released at that time, so at the transfer end position of the transfer conveyor 2B. The work base WB whose movement has been restricted moves on the lifting conveyor 7.
In this state, there is a magnet 53 between the work base WB placed on the lifting conveyor 7 and the work base WB located on the upstream side of the work base WB (work base WB located on the transfer conveyor 2B). Therefore, another work base WB located on the transport conveyor 2B is prevented from moving to the lifting conveyor 7 side.

  And if the raising / lowering conveyor 7 raises, the stopper 77 will raise following the raising of this raising / lowering conveyor 7, Therefore The stopper 77 will be arrange | positioned on extension of the conveyance conveyor 2B. Therefore, the stopper 77 prevents the new work base WB that has reached the transfer end position of the transfer conveyor 2A from falling to the lift conveyor 6 side after the lift conveyor 7 has moved above the transfer conveyor 2A. become.

  And if the raising / lowering conveyor 7 raises to the height position aligned with the conveyance start position of the conveyance conveyor 2A, the work base WB placed on the elevation conveyor 7 moves toward the conveyance start position of the conveyance conveyor 2A. It will be.

As described above, in the embodiment, the plurality of workpiece bases WB on which the workpieces W are placed are the conveyance device 1 that is sequentially and sequentially conveyed from the upstream side to the downstream side in the conveyance direction of the conveyance conveyor 2. ,
A magnet 53 having the same polarity (for example, N pole) is provided on the upstream side portion 52 and the downstream side portion 51 in the conveyance direction of the workpiece base WB, and between the workpiece bases WB adjacent in the conveyance direction, The repulsive force of the magnet 53 was made to act.

If comprised in this way, when the work base WB adjacent in the conveyance direction of the conveyance conveyor 2 will mutually approach, the repulsive force of the magnet 53 provided in the side parts 51 and 52 will act between both work bases WB, The work bases WB cannot approach each other more than a predetermined distance.
Therefore, it is possible to prevent the work bases WB from colliding with each other with a simple configuration in which the work base WB is provided with the magnet 53.

In particular, the repulsive force of the magnet 53 is used to prevent contact between the work bases WB. Therefore, even if the work base WB stays at any position on the transport conveyor 2, the contact between the work bases WB is maintained. It can be surely prevented.
In the case of the transport apparatus 100 according to the conventional example shown in FIG. 5, contact between the work bases (work bases WB <b> 2 and WB <b> 3) could not be prevented in a portion where the stopper 106 is not provided. By adopting a configuration using the repulsive force, it is possible to suitably prevent contact between the work bases WB at any position on the conveyor 2.

Further, when the magnetic poles of the magnets 53 provided on the one side 51 and the other side 52 of the work base WB have different polarities, depending on the orientation of the work base WB adjacent in the transport direction, The work bases WB may be attracted by the magnetic force of the magnets and come into contact with each other.
By setting the magnetic poles of the magnets 53 provided on one side 51 and the other side 52 of the work base WB to the same polarity, the work base WB is set on the conveyor 2 during the work. Since it is not necessary to consider the direction of the base WB, the work efficiency can be improved.

The transport conveyor 2 is a roller type conveyor in which a plurality of cylindrical rollers 21 on which the work base WB is placed are provided in the transport direction.
The roller 21 is rotatably supported by a rotating shaft 22 (shaft member) supported by a pair of side covers 23 and 24 (side plates) in which one end and the other end in the longitudinal direction are opposed to each other.
The side covers 23 and 24 are formed at a height extending above the roller 21, and the upper surface 21 a of the roller 21 is located below the upper ends 23 a and 24 a of the side covers 23 and 24. The side covers 23 and 24 are configured such that the upper ends 23a and 24a of the side covers 23 and 24 are positioned on the sides of the work base WB.

  With this configuration, even if the work base WB moves in the width direction of the transport conveyor 2 due to the repulsive force of the magnet 53 acting on the work base WB, the work base WB is dropped from the transport conveyor 2. , 24.

The transport conveyor 2 is composed of an upper transport conveyor 2A that transports the work base WB on which the work W is placed, and a lower transport conveyor 2B that is disposed below the upper transport conveyor 2A.
The transport device 1
The transfer end position of the upper transfer conveyor 2A is provided so as to be movable up and down between the position on the extension of the transfer end position of the upper transfer conveyor 2A and the position on the extension of the transfer start position of the lower transfer conveyor 2B. Elevating conveyor 6 (first elevating conveyor) for conveying the work base WB that has reached to the conveyance start position of the lower conveyor 2B,
A stopper mechanism 8 (first entry control means) that prevents or enables entry of the work base WB that has reached the conveyance end position of the upper conveyance conveyor 2A in conjunction with the elevation of the elevation conveyor 6; It was set as the structure provided with.

  Since the elevating conveyor 7 moves up and down between the upper conveyor 2A and the lower conveyor 2B, a stopper mechanism 8 that prevents or enables the work base WB that has reached the conveyance end position to enter the elevating conveyor 6 is provided. By providing, when the raising / lowering conveyor 7 is not located on the extension of the conveyance conveyor 2A, it is possible to suitably prevent the work base WB that has reached the conveyance end position of the conveyance conveyor 2A from dropping to the elevation conveyor 7 side. .

The stopper mechanism 8 is rotatably supported by a support shaft 82 provided on the transport conveyor 2A, and an end portion 83a on one side in the longitudinal direction protrudes above the upper surface 21a of the roller 21 so that the work base WB An angular position (blocking position: see FIG. 4A) for preventing the movement to the lifting conveyor 7 side and a position lower than the upper surface 21a of the roller 21 to move the work base WB to the lifting conveyor 7 side. A stopper plate 83 that is movable between an angular position (permitted position: see FIG. 4C)),
An operation plate 89 that moves up and down integrally with the lifting conveyor 6,
The operation plate 89 rotates the end 83b on the other side in the longitudinal direction of the stopper plate 83 around the support shaft 82 in conjunction with the lifting and lowering of the lifting conveyor 6, so that the end of the support shaft 82 is sandwiched and opposite to the end 83b. The end 83A located on the side is configured to move between the blocking position and the permission position.

With this configuration, the stopper plate 83 is rotated around the support shaft 82 by the operation plate 89 that moves up and down integrally with the elevating conveyor 6 without separately providing a dedicated driving device (stopper) such as an air cylinder. With a simple configuration, the work base WB that has reached the transfer end position of the transfer conveyor 2A can be suitably prevented from falling to the lifting conveyor 7 side.
In particular, since it is not necessary to provide the stopper 106 used in the transport apparatus 100 according to the conventional example, the equipment cost of the transport apparatus can be reduced to the extent that the stopper 106 can be omitted. Moreover, since the space on the facility required for providing the stopper 106 can be omitted, the apparatus configuration of the transport device can be further reduced.

The transport device 1 is provided so as to be movable up and down between a position on the extension of the transport end position of the lower transport conveyor 2B and a position on the extension of the transport start position of the upper transport conveyor 2A. Elevating conveyor 7 (seventh elevating conveyor) for conveying work base WB that has reached the conveying end position of 2B to the conveying start position of upper conveying conveyor 2A;
In conjunction with the raising and lowering of the elevating conveyor 7, a stopper 77 that prevents or allows the work base WB that has reached the conveyance end position of the lower conveying conveyor 2 </ b> B to enter the elevating conveyor 7 is provided.

  Since the elevating conveyor 7 moves up and down between the upper conveyor 2A and the lower conveyor 2B, the work base WB that has reached the conveyance end position of the lower conveyor 2B is prevented from entering the elevating conveyor 7, or By providing the permissible stopper 77, when the lifting conveyor 7 is not located on the extension of the conveyor 2B, the work base WB that has reached the transfer end position of the conveyor 2B falls to the elevator 7 side. Can be suitably prevented.

In the above-described embodiment, the magnets 53 provided on the work base WB are all N poles, but all the magnets 53 may be S pole magnets.
Further, in the work base WB according to the above-described embodiment, the plurality of magnets 53 are provided in the width direction of the work base WB, so that the repulsive force by the magnets 53 acts reliably between the work bases WB adjacent in the transport direction. N pole and S pole magnets may be combined within a range that can be applied.
For example, when a total of five magnets are provided on the side 51 of the work base WB, the S pole, N pole, S pole, N pole, and S pole are arranged from one side in the width direction of the work base WS. Alternatively, the polarities may be alternately switched. Even in such a case, between the work bases WB adjacent in the transport direction, the S poles and the N poles are arranged to face each other, so that a repulsive force by a magnet acts between both work bases WB. be able to.

Furthermore, all the polarities of the magnets 53 provided on the upstream side portion 52 in the conveyance direction of the work base WB are N poles (or S poles), and all the polarities of the magnets 53 provided on the downstream side portion 51 are S poles. (Or N pole).
In such a case, when the work base WB is placed on the transport conveyor 2, by determining the orientation of each work base WB so that the repulsive force of the magnet 53 acts between the work bases WB adjacent in the transport direction, A repulsive force by a magnet can be applied between both work bases WB.

DESCRIPTION OF SYMBOLS 1 Conveying device 2 (2A, 2B) Conveying conveyor 6 Lifting conveyor 7 Lifting conveyor 8 Stopper mechanism 9 Air cylinder 21 Roller 22 Rotating shaft 23, 24 Side cover 51 One side 52 The other side 53 Magnet 61 Roller 62 Rotating shaft 63, 34 Side cover 65 Stopper 71 Roller 72 Rotating shaft 73, 74 Side cover 75 Stopper 76 Support plate 77 Stopper 81 Support plate 82 Support shaft 83 Stopper plate 83a End portion 83b End portion 85 Bottom plate 86 Support wall 87 Rotation shaft 88 Auxiliary roller 89 Operation plate 91 Shaft portion 100 Conveying device 101 Conveying conveyor 102 Frame 103 Roller 106 Stopper 107 Lifting conveyor VL Vertical line W Work W1 Width W2 Width WB Work base X1 Axis line

Claims (6)

A plurality of work bases on which workpieces are placed are transport devices that are transported continuously from the upstream side to the downstream side in the transport direction of the transport conveyor,
Magnets are provided on one side and the other side of the work base in the transport direction, respectively, so that the repulsive force of the magnet acts between the work bases adjacent in the transport direction. Characteristic transport device.   2. The transfer apparatus according to claim 1, wherein magnetic poles of magnets provided on the one side and the other side of the work base have the same polarity. The transport conveyor is a roller-type conveyor in which a plurality of cylindrical rollers on which the work base is placed are provided in the transport direction,
The roller is rotatably supported by a shaft member supported by a pair of side plates in which one end and the other end in the longitudinal direction are opposed to each other,
The conveying device according to claim 1, wherein the side plate has a height that extends above the roller on which the work base is placed. The conveyor is composed of an upper conveyor that conveys a work base on which the workpiece is placed, and a lower conveyor that is disposed below the upper conveyor.
The transfer device
A work base which is provided so as to be movable up and down between a transfer end position of the upper transfer conveyor and a transfer start position of the lower transfer conveyor, and reaches the transfer end position of the upper transfer conveyor, A first elevating conveyor that conveys to a conveyance start position of the conveyor;
First entry control means for preventing or enabling entry of the work base that has reached the conveyance end position of the upper conveyance conveyor in conjunction with the elevation of the first elevation conveyor to the first elevation conveyor; The conveying apparatus according to any one of claims 1 to 3, further comprising: The first entry control means includes
It is rotatably supported by a support shaft provided on the upper conveyor, and one end in the longitudinal direction is positioned above the roller so that the work base is moved to the first lifting conveyor. A stopper that is movable between an angular position that prevents entry and an angular position that is positioned below the roller and allows the work base to enter the first lifting conveyor;
An operation plate that moves up and down integrally with the first lifting conveyor,
The operation plate rotates on the other end in the longitudinal direction of the stopper around the support shaft in conjunction with the raising and lowering of the first lifting conveyor, so that the operation plate is placed on the opposite side across the support shaft. An angular position at which the end of the one side located prevents the work base from entering the first elevating conveyor, and an angular position allowing the work base to enter the first elevating conveyor; The transfer apparatus according to claim 4, wherein the transfer apparatus moves between the two. The transfer device
The work base which is provided so as to be movable up and down between the transfer end position of the lower transfer conveyor and the transfer start position of the upper transfer conveyor, and reaches the transfer end position of the lower transfer conveyor, A second elevating conveyor that conveys to a conveyance start position of the conveyor,
Second entry control means for preventing or enabling entry of the work base that has reached the transfer end position of the lower transfer conveyor in conjunction with the raising and lowering of the second lift conveyor; The transport apparatus according to claim 4, further comprising:

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