JP4658893B2 - Work transfer device - Google Patents

Description

  The present invention relates to a workpiece transfer device that transfers a plurality of workpieces at a predetermined interval so that an assembling operation for the workpieces can be performed by a flow operation.

  For example, in an assembly line in which parts are assembled and assembled in a work such as an engine, the length of the work transfer device is determined in accordance with the assembly process of the engine, and a long conveyor that matches the length of the assembly line in the factory. A frame is installed. Moreover, in such a workpiece conveyance apparatus, it is comprised so that it may convey in one direction in the state which mounted the engine in the workpiece support stand with the drive motor attached to the conveyor frame. In addition, in order to make it easier for the workers to perform the assembly work, foundation work was performed in which pits were formed on the floor in order to reduce the height of the work jig and the work transfer device was buried in the floor. .

  By the way, when the engine shape is changed or the number of production changes due to a car model change, the assembly tact of the engine assembly line is adjusted. Attaching work may not be completed, or wasteful time may be wasted. For this reason, it may be necessary to increase or decrease the assembly process. However, when the conveyor device is composed of the entire assembly line by one long conveyor, if the foundation work is performed and the conveyor is installed on the floor, the length of the assembly line is changed. There is a problem that adjustment is difficult because large-scale foundation work is required. Further, when the return path of the work jig is formed by pits, a larger foundation work is required.

  Therefore, in the unit assembly type conveyor device described in Japanese Utility Model Registration No. 3087191 (Patent Document 1), a chain is formed on both sides of the base between a drive unit and a driven unit having a sprocket rotatable about a vertical axis. Two conveyor units with two pairs of guides and guide rails are installed symmetrically, endless transport chains are attached to the sprockets of the drive unit and the driven unit, and a transport cart that moves on the floor to this transport chain. It is configured to connect and transport the engine on the transport carriage. In the conveyor device having such a configuration, when adjusting the length, after removing the transport chain from the sprocket, the conveyor unit is increased or decreased to adjust the overall length, and the adjusted transport chain is wound around the sprocket again. To do. That is, the length of the conveyor device can be adjusted relatively easily.

Utility Model Registration No. 3087191

  However, also in the conveyor apparatus of patent document 1, since the whole conveyor apparatus is conveyed with the rotational force of the drive motor which rotationally drives either one of the sprockets, the conveyor apparatus is especially driven by the rotational force of this drive motor. It was inevitable that foundation work was required to firmly fix the floor to prevent it from moving.

  In other words, in the conventional workpiece transfer device, the conveyor device that constitutes the assembly line is composed of one long conveyor, which is installed on the floor after foundation work, so the length of the conveyor is reduced. There is a problem that it cannot be changed easily.

  The present invention has been made in consideration of the above problems, and a work transfer device that can easily adjust the length of the assembly line as necessary according to the work environment of the worker in each process. The issue is to provide.

In order to solve the above problems, the present invention provides:
A work support base for supporting the work in a plurality of different postures, and a conveyor for placing the work support base and transporting the work support base in a predetermined transport direction ;
The conveyor is a work transfer apparatus formed by combining a plurality of conveyor modules are divided into the length of one step fraction carried out in each work area,
The conveyor module is a belt conveyor comprising a plurality of rollers arranged at a height position floating a required height from the floor, and a belt wound around these rollers; and
A guide plate disposed at a height position lower than the conveying surface of the belt on an extension line on the upstream side or the downstream side in the conveying direction of the belt conveyor;
A guide portion for placing a guide plate of an adjacent conveyor module on an extension line on the downstream side or the upstream side in the conveyance direction of the belt conveyor and preventing a positional shift in the left-right direction between the adjacent belt conveyors;
Provided with a workpiece transfer device , characterized in that the workpiece support has a base plate that has an area capable of stably supporting a workpiece at a height position required for work and is in contact with the transfer surface of the belt. Yes.

  According to the above configuration, since the workpiece transfer device includes the workpiece support table that supports the workpiece and the conveyor that transfers the workpiece support table, the plurality of conveyor modules sequentially transfer one workpiece support table sequentially. Thus, the workpiece can be conveyed from the conveyance start point of the workpiece conveyance device to the conveyance end point. That is, by increasing or decreasing the number of conveyor modules, the overall length of the work transfer device can be changed very easily.

  In addition, since the workpiece holding means supports the workpiece in a plurality of different postures, the posture of the workpiece can be changed so that the operator can easily perform assembly work on the workpiece, Work efficiency is good. The mechanism for supporting the workpiece in different postures includes a first rotation means that can rotate about the vertical axis, a second rotation means that can rotate about the horizontal axis, and the height position of the workpiece. It is preferable to include elevating means for adjusting the angle. Furthermore, it is preferable that the rotating means and the elevating means can be fixed at arbitrary positions, but they may be fixed in stages.

Furthermore, since the rollers are arranged at a position where the rollers are lifted from the floor by the required height, the height of the conveyor module comprising the belt conveyor including these rollers and the belt is suppressed to the minimum necessary height from the floor. To improve stability. Therefore, the conveyor module can be stably installed on the floor without special foundation work. Further, if the belt conveyor with low-floor conveyor, since its low conveying surface, the operator is also possible to perform the assembling of the engine held aboard the belt workpiece support, transport of the workpiece Even in the middle, the worker can work at a position where the worker stops relative to the workpiece.

Furthermore, since the guide plate and the guide portion are provided on the upstream or downstream extension line in the conveying direction of the belt conveyor, when connecting the conveyor modules arranged on the floor, the positional displacement is prevented and the conveyor modules are connected to each other. It is possible to stably carry the work support at the connecting portion.
In addition, since the work support base is provided with a base plate on the conveying surface of the belt, the work is stabilized at a height suitable for the work so that the efficiency of the assembling work by the user can be kept high. Can be held. In addition, an operator can perform assembly work stably by forming a scaffold for the operator to board the base plate.

Each of the conveyor modules preferably includes a drive motor that supplies power for conveyance. That is, by distributing the drive motors to the respective conveyor modules, the short conveyor modules for one process can be respectively driven by the respective drive motors, and workpieces can be conveyed by the small drive motors. In addition, by suppressing the output of the drive motor to a small level, large-scale foundation work for fixing the conveyor module to the floor so as not to move is unnecessary. That is, the line can be installed and moved easily and easily.

  It is preferable to provide a parts table that can be accommodated with the parts to be assembled with the work by being placed on the conveyor. According to the said structure, since the components used as the assembly | attachment object with respect to this workpiece | work are accommodated in the components stand conveyed with each workpiece | work, the assembly operation | work by an operator becomes still easier.

Provided on each side of the conveyor module with guide rails for guiding the moving direction of the work support table in the conveying direction of the conveyor,
It is preferable that the work support base includes a moving direction restricting unit that restricts the moving direction to the conveying direction of the conveyor module by engaging with the guide rail.

  According to the said structure, by engaging the said movement direction control means with the guide rail provided in the side surface of the conveyor module, it prevents that the position of a horizontal direction shift | deviates with respect to a conveyance direction, or remove | deviates from a workpiece conveyance apparatus. Can do. Further, since the movement direction restricting means may be any means that engages with the guide rail and restricts the movement direction of the work support base, it may be a protrusion that protrudes from the lower part of the work support base and engages with the guide rail. However, a roller for proposing a frictional resistance may be formed at a portion engaging with the guide rail.

  It is preferable to provide a direction changer that carries in the work support carried by the upstream conveyor module, rotates it in accordance with the conveyance direction of the downstream conveyor module, and then carries it out to the downstream conveyor module.

  According to the said structure, since the conveyance direction of each conveyor module can be changed within one workpiece conveyance apparatus, the assembly line by a workpiece conveyance apparatus can be formed freely.

  By interposing the direction changer, it is preferable that the workpiece is conveyed in a substantially U-shaped conveyance direction in a plan view using a series of conveyor modules, and the conveyance start point and conveyance end point by the series of conveyor modules are brought close to each other. .

  According to the above configuration, since the transfer start point and the transfer end point of the workpiece transfer device are brought close to each other, the work of carrying the work support to the transfer start point after transferring the workpiece to the transfer end point using a series of conveyor modules. The work can be performed as lightly as possible, and the flow of the work transfer device can be improved. Moreover, space saving can be achieved by making the configuration of the assembly line substantially U-shaped.

  As described above, according to the present invention, it is possible to easily adjust the length of the workpiece transfer device in accordance with the change in the number of workpieces produced and / or the change in the assembly process for the workpieces. You can change the installation.

  Moreover, since the workpiece transfer apparatus can be stabilized by forming the height of the conveyor as low as possible, the workpiece transfer apparatus can be easily and stably installed. In addition, it is possible to perform the assembling work while the worker is on the conveyor.

  By forming the assembly line not only in a straight line but also in a substantially L shape or U shape in plan view, it is possible to effectively use the limited space in the factory and form the assembly line of the workpiece. Is possible. In addition, by forming the workpiece transfer device in a substantially U shape so that the transfer start point and transfer end point of the workpiece transfer device are close to each other, the workpiece support table that has finished transferring the workpiece is not moved greatly. The next workpiece can be transferred using the support table.

  FIGS. 1-9 is a figure which shows the structure of the workpiece conveyance apparatus 1 which concerns on 1st Embodiment of this invention. As shown in FIG. 1, a workpiece transfer device 1 according to the present invention includes workpiece support tables 2A, 2B,... For supporting a workpiece W, component tables 3A, 3B, for accommodating components to be assembled to the workpiece W, and support for these workpieces. .. And the parts tables 3A, 3B... And the conveyor 4 that conveys them in a predetermined conveyance direction.

  The conveyor 4 of this embodiment includes a plurality of conveyor modules 5A to 5E divided into a length corresponding to one process, work support tables 2A, 2B,... And parts tables 3A conveyed by the upstream conveyor modules 5B, 5C. 3B..., And direction changers 6A, 6B that are carried out to the downstream conveyor modules 5C, 5D after being rotated according to the conveying direction of the downstream conveyor modules 5C, 5D. In this work conveyance device 1, by providing the direction changers 6A and 6B between the conveyor modules 5B to 5E, the conveyance direction of the workpiece W is changed to a U shape in a plan view, and the conveyance start point of the workpiece conveyance device 1 St is brought close to the conveyance end point Ed.

  In the following description, when the distinction is unnecessary, the workpiece support bases 2A, 2B..., The parts bases 3A, 3B..., The conveyor modules 5A, 5B. That's it.

  The direction changers 6A and 6B may have various configurations. Even if the turners 6A and 6B are provided with a turntable that rotates the work support 2 loaded from the upstream conveyor module 5 around the vertical axis, The work support 2 may be lifted from the conveyor module 5 and rotated around the vertical axis so as to be mounted on the downstream conveyor module 5.

  2-5 shows the structure of the workpiece | work support stand 2 and the conveyor module 5 of the said workpiece conveyance apparatus 1. FIG. As shown in FIGS. 2 to 5, the work support 2 includes a base plate 10 in contact with the conveying surface of the conveyor module 5, elevating means 11 standing at the center of the base plate 10, and the elevating means 11 , A turntable 12 that is pivotably mounted about the longitudinal axis P, a support arm 13 that is erected on the turntable 12 and is bent in a substantially U shape as a whole. Supporting means 14 is provided that locks the workpiece W at the upper end and supports the workpiece W so as to be rotatable about the horizontal axis Q. That is, the workpiece support 2 is configured to support the workpiece W in a plurality of different postures that facilitate the assembly work by the operator.

  The area of the base plate 10 is large enough to stably support the workpiece W when transported in a state where the workpiece W is supported at a height suitable for assembly work, A movement direction restricting means 10a (a protrusion provided with a rotatable roller) that engages with a guide rail, which will be described later, protrudes on the lower surface.

  The elevating means 11 includes an air cylinder that adjusts the height position of the workpiece W to a height suitable for the assembly work by the operator, and is configured to hold the workpiece W at an arbitrary height position by the operator's operation. ing. Similarly, the rotation angle of the turntable 12 can be changed to an arbitrary angle by an operator's operation, and the rotation angle can be fixed using fixing means according to an arbitrary form.

  The support arm 13 includes a base portion 13a made of a steel material and an arm portion 13b that is detachably attached to the base portion 13a and formed in a shape that matches the workpiece W. That is, the support arm 13 is configured to support the workpiece W at two points so as not to interfere with the assembling work and to hold the work W at a position floating from the rotary table 12.

  The support means 14 protrudes so as to lock the workpiece W in a state where the workpiece W is placed so as to lock the protrusion portion of the workpiece on the hook portion 14a and the hook portion 14a. A locking piece 14b that holds and holds so that it does not come off from the hook portion 14a, a support lock lever 14c that operates the locking piece 14b to move in and out, and rotation and fixing around the horizontal axis Q of the hook portion 14a. And a rotation operation lever 14d for operating the. The hook portion 14a is for locking the workpiece W above the center of gravity of the workpiece W, and the locking piece 14b is for locking the workpiece W on the horizontal axis Q passing through the center of gravity of the workpiece W or in the vicinity thereof. is there.

  The parts table 3 has a base portion 15 placed on the transport surface of the conveyor module 5, a support column 16 standing at the center of the base portion 15, and a height that can be reached by an operator at the upper end portion of the support column 16. And a tray 17 disposed on the surface. Note that the base portion 15 of the parts table 3 and the like may be formed integrally with the base portion 10 of the workpiece support 2 and the like.

  The conveyor module 5 is composed of a bottom plate 20A and a pair of left and right side frames 20B attached to the bottom plate 20A in a state in which the longitudinal direction is parallel to the conveying direction of the workpiece W. , 20C, a top plate 21 disposed between the side frames 20B, 20C, and a plurality of rollers 22A disposed so that the upper portion protrudes from a long hole 21a formed in the top plate 21 at a predetermined interval. ˜22Z (hereinafter referred to as roller 22 when it is necessary to distinguish), belt 23 wound around roller 22, and the side of frame (side surface of conveyor module) of side frame 20 </ b> B, workpiece support 2 And a guide rail 24 that guides the moving direction in the conveying direction of the conveyor 4.

  The conveyor module 5 is divided for each length of work performed by one worker by an operator. In this embodiment, the total length of the conveyor module 5 is 3 m.

  The bottom plate 20A is formed with a fixing portion 20d at a portion protruding from the side frames 20B and 20C. That is, it is configured such that an anchor can be driven into a hole 20h provided in the fixing portion 20d or a screw or the like can be inserted to fix it to the floor F.

  The top plate 21 has reinforcing ribs 21b that are fixed to the side frames 20B and 20C and support the top plate 21 between the long holes 21a, and is configured to withstand the load of the work support 2. . Further, the top surface of the top plate 21 is coated with a resin film having a low friction resistance so as not to generate a frictional resistance with the belt 23, so that a low friction surface treatment is applied.

  The rollers 22A to 22N are driven rollers configured to be rotatable around a horizontal axis, and as shown in FIG. 6, the roller 22Z is configured to be provided with a driving motor 25 to apply a driving force to the belt 23. Drive roller. These rollers 22 are arranged at a height position that is lifted from the floor F by a necessary height. Here, the height position floated by a necessary height is a position as low as possible so that the belt 23 wound around the lower surface of the roller 22 does not contact the floor F. In this embodiment, the conveyor module The conveying surface 5 is configured to have a height of 10 cm from the floor F.

  As shown in FIG. 7, the roller 22A located at the opposite end of the driving roller 22Z is configured to be supported by a bearing portion 26 on its rotating shaft, and this bearing portion 26 is composed of a side frame 20B, It is attached to the frames 20B and 20C by screws B inserted into the long holes 20s formed in 20C. That is, the driven roller 22A has a tension adjusting mechanism that can adjust the magnitude of the tension applied to the belt 23 by adjusting the tightening position of the screw B with respect to the long hole 20s.

  The belt 23 is an endless belt-shaped body made of a synthetic resin, and forms the transport surface S of the conveyor module 5 on the upper surface of the belt 23 disposed on the roller 22 by contacting the upper surface of the roller 22. is there.

  The guide rail 24 is a metal plate having the same shape as the frame 20B and arranged in parallel to the frame 20B via a spacer 24a. In the groove formed between the guide rail 24 and the frame 20B, By locating the moving direction restricting means 10 a protruding from the lower surface of the base plate 10, the moving direction restricting means 10 a can be engaged with the guide rail 24.

  The drive motor 25 supplies a driving force to each conveyor module 5 and is mounted on each of the conveyor modules 5A, 5B. Further, the power lines (not shown) of the drive motors 25 are sequentially connected to the drive motors 25 of the adjacent conveyor modules 5 so as to be connected in parallel.

  As shown in FIGS. 8 and 9, a guide plate 27 is disposed at a height position lower than the transport surface S on the extension line on the downstream side in the transport direction of the driving roller 22 </ b> Z. Reference numeral 27 a denotes a beam member that supports the guide plate 27. Further, a beam member 26a attached at a height position lower than the conveying surface S is provided on the extension line on the upstream side in the conveying direction of the roller 22A. In addition, this beam member 26a mounts the guide plate 27 on the upstream side on this, thereby placing the guide plate 27 of the adjacent conveyor module and shifting the position of the adjacent belt conveyors 5 in the horizontal direction. It functions as a guide part to prevent.

  The workpiece conveyance device 1 configured as described above conveys the workpiece W in an arbitrary direction according to the needs of the factory that forms the assembly line by combining the plurality of conveyor modules 5 and the direction changer 6. An assembly line having an arbitrary length can be formed. That is, it is possible to flexibly cope with increase / decrease in the number of workpieces W produced and adjustment of production tact.

  When installing the conveyor module 5 on the floor F, each conveyor module 5 is fixed to the floor F by driving an anchor into a hole 20h of a fixing portion 20d provided at an appropriate position of the conveyor module 5. At this time, since each conveyor module 5 is provided with a drive motor 25, there is no need to increase the output of each drive motor 25 without any darkness, and a large-sized drive motor that supplies driving force to the entire workpiece transfer device 1 is provided. Compared with the case where it provides, the fixation of the conveyor module 5 with respect to the floor F can be performed simply. Therefore, the fixing portion 20d may be fixed not only by anchoring but also by simpler means such as screws.

  In the connecting portion between the adjacent conveyor modules 5, the guide plate 27 is placed on the guide portion formed by the beam member 26 a of the adjacent conveyor module 5, so that the position of the adjacent conveyor modules 5 in the left-right direction is set. The connection can be prevented while preventing the displacement. That is, the guide rails 24 of the conveyor module 5 to be connected can be very easily and stably arranged on a straight line. Thus, the conveyor 4 which can connect the some conveyor module 5 and the direction change machine 6, and can change an assembly line easily as needed can be formed. Moreover, the drive motor 25 of the adjacent conveyor module 5 is connected in parallel by a power supply line (not shown), so that a plurality of drive motors 25 can supply power simultaneously using one power supply circuit.

  On the other hand, the work support base 2 is engaged with the support means 14, and the work support base 2 with the work W engaged is placed at the transfer start point St of the conveyor 4. The workpiece W can be conveyed in a predetermined conveyance direction. At this time, the moving direction restricting means 10a formed on the lower surface of the base plate 10 is placed so as to enter the groove formed between the guide rail 24 and the side frame 20B, thereby moving the moving direction restricting means 10a. The conveyance direction of the work support 2 can be regulated by engaging with the guide rail 24. Since the movement direction restricting means 10a is a roller that is rotatably supported, friction caused by contact with the guide rail 24 can be minimized.

  The work support 2 placed on the transport surface S of the conveyor 4 comes into contact with the upper surface of the belt 23 so that the belt 23 and the lower surface of the base plate 10 come into contact with each other. Since there is a frictional resistance between the belt 23 and the base plate 10, when the belt 23 is moved by the rotation of the driving roller 22Z, the work support 2 can be moved in the belt moving direction, that is, the conveying direction. The parts table 3 is also mounted on the belt 23 along with the workpiece support table 2 and conveyed.

  Although the lower surface of the belt 23 is configured to contact the upper surface of the top plate 21, the upper surface of the top plate 21 is subjected to surface processing with low frictional resistance, and therefore the belt 23 is the upper surface of the top plate 21. Move while sliding. Further, since the rollers 22 are provided so as to protrude from the long holes 21a corresponding to the plurality of long holes 21a formed in the top plate 21, resistance due to friction between the rollers 22 and the top plate 21 is provided. Can be reduced. Furthermore, by increasing the tension applied to the belt 23, the frictional resistance of the belt 23 can be reduced.

  The belt 23 constituting the conveying surface S is supported not only by the roller 22 but also by the top plate 21 and the guide plate 27 (between the conveyor modules 5) arranged on the portion where the roller 22 is not provided. The workpiece support 2 and the parts table 3 mounted on the transfer surface S can be stably transferred. In addition, the more stable the workpiece support 2 and the parts table 3 can be conveyed, the easier the operator can perform the parts assembling work on the workpiece W supported by the workpiece support 2. Furthermore, since the work table is also conveyed at the same time, the operator can take out only the parts to be assembled from the parts table 3 and assemble them onto the workpiece W.

  In addition, as shown in FIG. 10, since the conveyor 4 of the present embodiment is a low-floor conveyor, when the worker M gets on the transport surface S of the conveyor 4, the worker M and the workpiece W are relative to each other. It is possible to stop the relative positional relationship. That is, the worker M can easily perform the assembling work on the workpiece W. Furthermore, since the workpiece support 2 supports the workpiece W in a plurality of different postures and supports the workpiece W in a state of being lifted at a high position with respect to the base plate 10 and the turntable 12, the operator M The work efficiency by is good. In addition, you may form the space for the operator M to board the said base stand 10 or 15. FIG.

  Since the support means 14 includes a substantially J-shaped hook portion 14a that supports a position higher than the center of gravity of the workpiece W at two points, the workpiece W can be stably supported. Further, since the latching piece 14b for retaining and holding the workpiece W and the instruction lock lever 14 for operating the latching piece 14b are provided, the support means 14 can support the workpiece W in any posture. It will not come off. Further, since the locking piece 14b is provided on the horizontal axis Q in the horizontal direction and the rotation operation lever 14d is provided, the rotation around the horizontal axis Q can be easily performed.

  Since the conveyor 4 for transporting the workpiece support 2 is formed by a plurality of conveyor modules 5A, 5B... Divided into lengths for one process, by increasing or decreasing the number of conveyor modules 5, It is possible to easily adjust the overall length of the workpiece transfer device 1.

  FIG. 11 is a diagram illustrating a configuration of a workpiece transfer apparatus 1A according to a second embodiment in which the workpiece transfer apparatus 1 is modified. In the workpiece transfer apparatus 1A shown in FIG. 11, an example of forming an assembly line for transferring the workpiece W in a substantially L shape in plan view by interposing one direction changer 6 between the conveyor modules 5C and 5D. Show. That is, it is possible to adjust the assembly line with a slight change from the configuration of the work transfer device 1 shown in FIG. Since other configurations are the same as those of the first embodiment of the present invention shown in FIGS. 1 to 10, detailed description thereof is omitted.

  FIG. 12 is a diagram illustrating a configuration of a work transfer device 1B according to a third embodiment in which the work transfer device 1 is further modified. 12 shows an example in which a plurality of conveyor modules 5A, 5B,... Are arranged on a straight line without using the direction changer 6. In the work transfer device 1B shown in FIG. About another structure, it is the same as 1st Embodiment of this invention shown in FIGS.

It is a figure which shows the whole structure of the workpiece conveyance apparatus which concerns on 1st Embodiment. It is a perspective view of the said workpiece conveyance apparatus. It is the side view seen from the side surface of the conveyance direction of the said workpiece conveyance apparatus. It is a top view of the said workpiece conveyance apparatus. It is the figure seen from the front of the conveyance direction of the said workpiece conveyance apparatus. It is a figure detailing a part of structure of the said workpiece conveyance apparatus. It is a figure which shows another structure of the said workpiece conveyance apparatus. It is a side view showing a configuration of a connection portion of the work transfer device, It is a perspective view of the said connection part. It is a figure which shows the usage example of the workpiece conveyance apparatus of this invention. It is a figure which shows the whole structure of the workpiece conveyance apparatus of 2nd Embodiment. It is a figure which shows the whole structure of the workpiece conveyance apparatus of 3rd Embodiment.

DESCRIPTION OF SYMBOLS 1 Work conveyance apparatus 2 Work support stand 3 Parts stand 4 Conveyor 5 Conveyor module 6 Direction change machine 10 Base plate 10a Movement direction control means 22 Roller 23 Belt 24 Guide rail 25 Drive roller 27 Guide plate St Conveyance start point Ed Conveyance end point

Claims (6)

A work support base for supporting the work in a plurality of different postures, and a conveyor for placing the work support base and transporting the work support base in a predetermined transport direction ;
The conveyor is a work transfer apparatus formed by combining a plurality of conveyor modules are divided into the length of one step fraction carried out in each work area,
The conveyor module is a belt conveyor comprising a plurality of rollers arranged at a height position floating a required height from the floor, and a belt wound around these rollers; and
A guide plate disposed at a height position lower than the conveying surface of the belt on an extension line on the upstream side or the downstream side in the conveying direction of the belt conveyor;
A guide portion for placing a guide plate of an adjacent conveyor module on an extension line on the downstream side or the upstream side in the conveyance direction of the belt conveyor and preventing a positional shift in the left-right direction between the adjacent belt conveyors;
A workpiece transfer apparatus comprising: a base plate having an area where the workpiece support can stably support a workpiece at a height position necessary for work, and contacting the transfer surface of the belt.   The workpiece conveyance device according to claim 1, wherein each of the conveyor modules includes a drive motor that supplies power for conveyance. The workpiece conveyance apparatus in any one of Claim 1 or 2 provided with the components base which can accommodate the components which should be conveyed with a workpiece | work support stand and to be assembled | attached to a workpiece | work by mounting in the said conveyor. Provided on each side of the conveyor module with guide rails for guiding the moving direction of the work support table in the conveying direction of the conveyor,
The workpiece support is, workpiece transfer device according to any one of claims 1 to 3, comprising a movement direction restricting means for restricting the movement direction of the conveying direction of the conveyor module by engaging with the guide rail. It carries the upstream conveyor workpiece support carried by module, according to claim 1-4 comprising a diverter for unloading the downstream conveyor module after rotation in accordance with the conveying direction of the downstream side conveyor module The workpiece conveyance apparatus in any one. By interposing the diverter, claim with a series of conveyor modules to convey the workpiece in the conveying direction of the plane substantially U-shape, is close to the transport end point and the conveyance start point by a series of conveyor modules 5 The workpiece transfer device described in 1.

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