JP5605286B2 - Assembly cart and production system using the same - Google Patents

Description

  The present invention relates to an assembly cart including a towing vehicle and a production system using the assembly cart. More specifically, the present invention relates to an assembly cart that can perform assembly work of parts while moving a workpiece, and a production system using the assembly cart.

  In general, a heavy-weight assembly factory is provided with a line for assembling various parts while conveying a workpiece by a conveyor. However, such a production line not only requires a large space, but when the quantity or shape of the product to be produced is changed, the configuration of the line can be easily changed according to the change. I could not. This is because it takes a lot of time and money to change the production line.

  Therefore, in order to adapt to changes in the quantity and shape of products to be produced, a production system has been considered in which parts are assembled while a work is being transported using a transport carriage instead of a conveyor. Here, the transport cart used in the production system is defined by a loaded self-propelled vehicle (loading type AGV) that travels with workpieces and the like, or a cart on which workpieces are placed, based on magnetic information on the floor. 2. Description of the Related Art A towed self-propelled vehicle (towed AGV) that is towed along a traveling route to travel unmanned is known. The towed AGV can prevent an excessive load from being applied to the drive wheels of the cart driven vehicle as compared with the loadable AGV, and the vehicle body can be miniaturized. In many cases, traction type AGV is used.

  A transport cart provided with such a traction type AGV is disclosed in Patent Document 1. In the transport cart disclosed here, as shown in FIG. 2 and FIG. 3 of Patent Document 1, a towed AGV (cart towed vehicle) is arranged on the front side in the transport direction in the transport cart, and the towed type The carriage is pulled by AGV.

JP 2005-297809 A

However, since the battery and the control device for driving the traction type AGV motor are arranged in the traction type AGV, it is difficult to reduce the size of the trolley.
In addition, when assembling parts while transporting a workpiece using this transport cart, that is, in a production system using a transport cart, the workpiece is loaded on the cart (especially in the case of heavy objects, at the center of the cart). Therefore, the work of assembling the parts to the workpiece had to be done in a forward bending posture. Since the working posture is bent forward in this way, the working efficiency is deteriorated and the burden on the worker is large.

  Accordingly, the present invention has been made to solve the above-described problems, and improves the work efficiency by performing assembly work of an assembly cart that can be reduced in size and parts in an easy working posture. It is an object of the present invention to provide an assembly cart that can be used and a production system using the same.

  One form of this invention made | formed in order to solve the said subject WHEREIN: In the assembly trolley | bogie provided with the towing vehicle driven with a motor, the wheel provided in the lower four corners of the frame | frame of a trolley | bogie, and a workpiece | work are hold | maintained above the said flame | frame. And a control unit that is attached to the frame and controls the driving of the towing vehicle. The clamp unit holds the workpiece and holds the center of gravity of the workpiece. The battery is disposed on the frame on the opposite side of the work held by the clamp portion with respect to the fixing portion of the clamp portion to the frame. The tow vehicle is disposed below the frame and connected to the frame.

  In this assembly cart, the clamp portion is arranged so that the position of the center of gravity of the workpiece is located outside between the wheels provided at the four corners of the frame of the cart while the workpiece is held. For this reason, a part of the workpiece is held out of the frame end of the assembly carriage. Thereby, an operator can approach a workpiece | work and can perform the assembly | attachment operation | work of components with an easy work attitude | position. As a result, work efficiency can be improved.

  Here, with such an arrangement of the clamp portion, there is a possibility that the weight balance is lost when the workpiece is held, and the assembly cart falls over. Therefore, in this assembly cart, the battery for driving the motor of the towing vehicle is arranged on the frame on the side opposite to the work held by the clamp portion with respect to the fixing portion of the clamp portion to the frame. . Thereby, since the weight balance in the assembly cart when the workpiece is held is maintained by the weight of the battery, the assembly cart can be prevented from overturning. In this way, this assembly cart secures workability and safety.

  In this assembly cart, since the battery and the control device are attached to the frame of the cart, the towing vehicle can be reduced in size, and the towing vehicle can be arranged below the frame. Thereby, size reduction of an assembly cart can be achieved.

  In the assembly cart described above, it is preferable that the control device is disposed above the battery.

  By adopting such a configuration, the control device is arranged on the side opposite to the workpiece held by the clamp portion, similarly to the battery. As a result, the center of gravity of the assembly carriage can be brought closer to the center of the carriage, so that the stability of the assembly carriage can be further improved.

  In the assembly cart described above, the towing vehicle has a connecting pin that protrudes upward, and the connecting pin is inserted into a pin receiving opening provided in the frame and is not pulled out from the pin receiving opening by a retaining member. It is desirable that

  By adopting such a configuration, when the assembly cart is tilted, the weight of the towing vehicle arranged on the lower side of the frame is applied to the assembly cart, so that the assembly cart is restored. Therefore, the assembly cart can be prevented from falling over more reliably.

  In the assembly carriage described above, it is preferable that the clamp portion includes a rotation mechanism that rotates the held workpiece and a lifting mechanism that raises and lowers the held workpiece.

  With such a configuration, the orientation and height position of the workpiece held in the assembly cart can be changed, so that the workpiece can be arranged at a position where it can be easily operated according to the physique of the worker. As a result, the burden on the worker can be greatly reduced, and as a result, work efficiency can be greatly improved.

  According to another aspect of the present invention made to solve the above-described problem, in the production system using any one of the assembly carts described above, the traveling track of the towing vehicle is a circumferential circuit, and the towing vehicle A supply space for parts to be assembled to the workpiece is provided outside the traveling track of the vehicle, and a host computer for transmitting a command to the towing vehicle is disposed inside the traveling track of the towing vehicle. The assembly cart includes the clamp unit. Is arranged so as to face the part supply space side, and the towing vehicle travels along the traveling track based on a command from the host computer received by the control device, and the part supply space. It is controlled so that it stops before.

  By making such a production system, it is possible to produce in a small space, and when there is a change in the quantity or shape of the product to be produced, the system configuration can be easily changed according to the change. . Also, it takes little time and money to change the system configuration. And in this production system, since the above-described assembly cart is used, it is possible to improve work efficiency while ensuring safety.

  According to the assembly cart according to the present invention, as described above, it is possible to reduce the size and to perform the assembly work of the parts in an easy working posture, so that the work efficiency can be improved. Moreover, according to the production system which concerns on this invention, since the assembly trolley | bogie which concerns on this invention is used as above-mentioned, work efficiency can be improved, ensuring safety | security.

It is a perspective view which shows schematic structure of the assembly trolley | bogie which concerns on embodiment. It is a front view which shows schematic structure of the assembly cart which concerns on embodiment. It is a figure which shows typically the connection structure of the flame | frame and towing vehicle of an assembly trolley | bogie. It is a figure which shows typically the structure of the production system which concerns on embodiment. FIG. 5 is a diagram showing a positional relationship between an operator who performs assembly work of parts and an automatic transmission held by an assembly carriage in the production system shown in FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying an assembly cart and a production system using the same according to the present invention will be described below in detail with reference to the drawings. Here, a case where the present invention is applied to an assembly process of an automatic transmission will be described as an example.
Therefore, the assembly cart according to the present embodiment will be described with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of the assembly cart according to the present embodiment. FIG. 2 is a front view showing a schematic configuration of the assembly cart according to the present embodiment. FIG. 3 is a diagram schematically showing a connection structure between the frame of the assembly carriage and the towing vehicle.

  As shown in FIG. 1, the assembly cart 10 includes a frame 11, a wheel 12, a clamp unit 20, a towing vehicle 30, a battery 31, and a control device 40. Then, by driving / stopping the towing vehicle 30, the assembly cart 10 travels / stops. The assembly cart 10 advances in the direction of the arrow in FIG.

The frame 11 includes a horizontal frame 11a and a vertical frame 11b, and has a substantially inverted T shape as a whole. That is, the vertical frame 11b is erected on the upper surface of the horizontal frame 11a. On the other hand, on the lower surface of the horizontal frame 11a, wheels 12a and 12b are attached to the four corners, and the towing vehicle 30 is disposed inside the wheels. In the present embodiment, the front wheel 12a is a free wheel and the rear wheel 12b is a fixed wheel.
And the battery 31 is arrange | positioned at the upper surface of the horizontal frame 11a, and the clamp part 20 and the control apparatus 40 are attached to the vertical frame 11b. Further, a pallet 18 for temporarily placing parts, tools, and the like, and a push handle 19 that an operator grips when manually moving the assembly cart 10 are attached to the upper end of the vertical frame 11b.

The clamp part 20 is for holding the automatic transmission W, which is a workpiece, and is provided on the upper side of the horizontal frame 11a. Specifically, the clamp part 20 is vertically moved in a cantilevered manner via the fixing part 20a with respect to the two elevating rails 14 and 14 provided in the vertical direction on the support plate 13 fixed to the vertical frame 11b. It is slidably mounted.
L-shaped support frames 15 and 15 are attached to the left and right ends of the support plate 13, and the lower portions of the support frames 15 and 15 are fixed to the horizontal frame 11a. Thus, the support plate 13 is fixed to both the horizontal frame 11a and the vertical frame 11b.

  The clamp unit 20 includes a gripping claw 21 for gripping the automatic transmission W, a rotating mechanism 22 that rotates the gripping claw 21, and a lifting mechanism 23 that lifts and lowers the gripping claw 21. Then, by rotating the operation handle 22a of the rotation mechanism 22, the direction of the automatic transmission W held by the clamp unit 20 can be changed (rotated) via a known gear mechanism. Further, by operating the operating lever 23a of the lifting mechanism 23 to drive the motor 23b and rotate the screw shaft 23c engaged with the fixing portion 20a, the fixing portion 20a moves up and down along the lifting rail 14. It has become. Note that the rotating mechanism 22 can be electrically driven like the lifting mechanism 23. Moreover, as the raising / lowering mechanism 23, a chain type thing etc. can also be used other than a screw type.

  As described above, in the assembly cart 10, the operation handle 22a and the operation lever 23a can be operated to change the orientation and height position of the automatic transmission W held in the clamp portion 20. Thereby, the operator can adjust the direction and height position of the automatic transmission W held by the assembly cart 10 so that the assembly work can be easily performed.

  And, when the gripping claw 21 holds the automatic transmission W, the clamp portion 20 has a center of gravity C of the automatic transmission W between the wheels (between the front wheels 12a, between the rear wheels 12b, as shown in FIG. That is, it is attached to the frame 11 so as to be located outside the T). Thereby, more than half of the automatic transmission W held by the clamp portion 20 is positioned outside the horizontal frame 11a. Therefore, the worker can approach the automatic transmission W held on the assembly cart 10 and can perform the assembly work of the parts in an easy working posture (see FIG. 5).

The traction vehicle 30 is a drive source of the assembly cart 10 and is driven by a motor. As shown in FIG. 3, the tow vehicle 30 includes a vehicle body 32, a motor 33, one front wheel 34a, and two rear wheels 34b. The motor 33 is attached to the inside of the vehicle body 32 and drives the front wheel 34a. The front wheel 34a serving as the driving wheel is provided at the center of the vehicle body 32 in the width direction (left-right direction in FIG. 3). On the other hand, the rear wheels 34 b are provided on the left and right in the width direction of the vehicle body 32. The towing vehicle 30 is driven by transmitting the driving force of the motor 33 to the front wheels 34a. The drive of the motor 33 is controlled by the control device 40.
The front wheels 34a may be provided on the left and right sides of the vehicle body 32 in the same manner as the rear wheels 34b. Further, the rear wheel 34b may be driven by the motor 33 or another motor.

  As shown in FIGS. 1 to 3, the towing vehicle 30 is disposed between the front wheels 12 a and 12 b of the assembly cart 10 and below the horizontal frame 11 a. As described later, the tow vehicle 30 can be arranged in such a manner that the battery 31 and the control device 40 are attached to the frame 11 instead of the tow vehicle 30 and the tow vehicle 30 can be downsized. Because. In the assembly cart 10, the assembly cart 10 is miniaturized by reducing the size of the towing vehicle 30 and arranging the towing vehicle 30 as described above.

The vehicle body 32 of the towing vehicle 30 is provided with a connecting pin 35 that protrudes upward. The connecting pin 35 is inserted into a pin receiving opening 16 provided in the horizontal frame 11a, and is prevented from being removed from the pin receiving opening 16 by a retaining member 36. In this way, the towing vehicle 30 is connected to the horizontal frame 11a. Thereby, the assembly cart 10 can be run (towed) by driving the towing vehicle 30.
Further, since the connecting pin 35 is prevented from being removed from the pin receiving opening 16 by the retaining member 36, if the assembly cart 10 is tilted, the horizontal frame 11a is restored so that the tilt of the assembly cart 10 is restored. On the other hand, the weight of the towing vehicle 30 is applied.

  Here, the battery 31 is a power source for driving the motors 33 and 23b, and is electrically connected to each motor. The battery 31 is mounted on the horizontal frame 11a as shown in FIGS. More specifically, the battery 31 is arranged on the horizontal frame 11a on the side opposite to the automatic transmission W held by the clamp part 20 with respect to the fixing part 20a of the clamp part 20 to the vertical frame 11b. Thus, the weight balance of the assembly cart 10 when the automatic transmission W is held is maintained by the weight of the battery 31. As a result, the assembly cart 10 can be prevented from falling. Further, the assembly structure of the tow truck 30 is also prevented from falling by the connecting structure of the towing vehicle 30 described above. Thus, in the assembly cart 10, workability and safety are ensured.

  And in this Embodiment, as shown in FIG.1 and FIG.2, the battery 31 is arrange | positioned at the edge part (an edge part on the opposite side to the arrangement position of the clamp part 20) of the horizontal frame 11a. Since the wheels 12 a and 12 b are arranged at the four corners of the horizontal frame 11 a, the batteries 31 and 31 are positioned around the upper part of the left front and rear wheels of the assembly cart 10. This prevents the weight balance of the assembly cart 10 from being lost due to the weight of the battery 31 when the automatic transmission W is not held. That is, in the assembly cart 10, the weight balance is taken into consideration so that the assembly cart 10 does not fall even when the automatic transmission W is not held, and safety is sufficiently ensured.

  Such drive control of the towing vehicle 30 is performed by the control device 40. Therefore, the control device 40 is connected to the battery 31 and the motor 33. The control device 40 receives a command from the host computer 51 or a command input through the magnetic tape 52 in the production system 50 to be described later, and controls the driving of the motor 33 based on the received command. The traveling control of the towing vehicle 30 (the assembly cart 10) is performed.

  And this control apparatus 40 is arrange | positioned above the battery 31, and is being fixed to the vertical frame 11b. That is, the control device 40 is arranged on the opposite side to the automatic transmission W held by the clamp unit 20, as with the battery 31. Such an arrangement of the control device 40 also contributes to improving the stability of the assembly cart 10.

Next, a production system for assembling the automatic transmission W using the assembly cart 10 will be described with reference to FIG. FIG. 4 is a diagram schematically showing the configuration of the production system according to the present embodiment.
As shown in FIG. 4, the production system 50 includes an assembly cart 10, a host computer 51, a magnetic tape 52, and component supply spaces 55 to 58. In the production system 50, various parts to be supplied to the parts supply spaces 55 to 58 are assembled to the automatic transmission W while the automatic transmission W is held and conveyed by the assembly cart 10.

  The host computer 51 manages the production system 50 in an integrated manner, and transmits an operation command or the like for the towing vehicle 30 of the assembly cart 10 to the control device 40. And the control apparatus 40 of the assembly cart 10 receives the command transmitted from the host computer 51. The command received by the control device 40 may be a command input through the magnetic tape 52 provided on the floor surface in addition to the command from the host computer 51. Information transmission between the host computer 51 and the control device 40 is performed by wireless communication.

  The magnetic tape 52 that becomes the traveling track of the assembly carriage 10 is provided on the floor so as to form a circumferential circuit. In the present embodiment, the magnetic tape 52 is laid in a substantially rectangular shape. The towing vehicle 30 travels on the magnetic tape 52 in the direction of the arrow shown in FIG. 4 (counterclockwise). The shape of the traveling track is not limited to a substantially rectangular shape, and may be determined in consideration of the space for providing the production system, the arrangement of the pre-process and the post-process.

And the assembly cart 10 is arrange | positioned so that it may face the inner side of the magnetic tape 52 which makes a surrounding circuit on the magnetic tape 52. As shown in FIG. In addition, the above-described host computer 51 is installed inside the magnetic tape 52 forming the peripheral circuit. On the other hand, outside the magnetic tape 52 forming the peripheral circuit, first to fourth component supply spaces 55 to 58 in which various assembly components are supplied (arranged) are provided. With such an arrangement, it is possible to eliminate a wireless communication obstacle between the host computer 51 and the control device 40, and the wireless communication between the host computer 51 and the control device 40 can be performed reliably. Yes.
In addition, a transfer space 59 in which the automatic transmission W is attached to and detached from the assembly carriage 10 is provided between the first component supply space 55 and the fourth component supply space 58.

  Here, a carrier and an extension housing are supplied and arranged in the first component supply space 55. A valve body and an oil pan are supplied and arranged in the second component supply space 56. An oil pump is supplied and arranged in the third component supply space 57. The fourth component supply space 58 is provided with a case housing and a torque converter.

Thus, in the production system 50 according to the present embodiment, the installation space of the production system (line) can be reduced by using the assembly cart 10. In the present embodiment, the installation space can be reduced to about 1/3 compared with the conventional production line.
In addition, since the degree of freedom of the system configuration is very high in the production system 50, the number of parts supplied to the parts supply spaces 55 to 58 and the parts themselves can be easily changed. In addition, the increase and decrease of the component supply space itself and the change of arrangement can be easily performed. Therefore, the system configuration can be easily changed according to the quantity and specifications of the automatic transmission to be produced, without spending enormous time and cost as in the conventional production line.

Next, the assembly work of the automatic transmission in the production system 50 described above will be described with reference to FIGS. FIG. 5 is a diagram showing the positional relationship between the worker who performs the assembly work of parts and the automatic transmission held by the assembly cart in the production system shown in FIG.
First, the semi-finished automatic transmission W in which various gears, clutches, and the like are assembled in the transmission case is transferred from the previous process to the transfer space 59 in the production system 50. Then, the semi-finished automatic transmission W is transferred to the assembly cart 10 in the transfer space 59. That is, the semi-finished automatic transmission W conveyed from the previous process is held by the clamp portion 20 of the assembly cart 10.

  When the semi-finished automatic transmission W is held by the clamp portion 20 of the assembly cart 10, the towing vehicle 30 is driven and starts to travel along the magnetic tape 52. Thereby, the assembly cart 10 is pulled by the towing vehicle 30 and travels. At this time, in the assembly cart 10, the weight balance is maintained by the battery 31 and the control device 40 as described above. For this reason, the automatic transmission W is transported in a state where more than half of the automatic transmission W protrudes from the lateral frame 11a, but the assembly cart 10 runs stably without falling down. Even if the assembly cart 10 is about to fall over, the connecting structure of the towing vehicle 30 and the lateral frame 11a described above causes the towing vehicle 30 to move relative to the lateral frame 11a so that the tilt of the assembly cart 10 is restored. Since the weight is applied, the assembly cart 10 is reliably prevented from overturning.

  Then, when the assembly cart 10 reaches the front of the first component supply space 55, it stops there. When the assembly cart 10 is stopped, the assembly work of the carrier and the extension housing is performed. That is, the carrier is first assembled to the semi-finished automatic transmission W held on the assembly cart 10, and then the extension housing is assembled.

  At this time, as shown in FIG. 5, half or more of the semi-finished automatic transmission W held on the assembly carriage 10 protrudes from the lateral frame 11 a. For this reason, the worker can approach the automatic transmission W and perform the assembly work. Further, the operator freely adjusts the orientation and height position of the automatic transmission W held by the assembly carriage 10 by operating the operation handle 22a or the operation lever 23a to rotate or lift the clamp portion 20. be able to. From these things, the worker can perform the assembly work of the parts with a very easy posture. As a result, the burden on the worker is reduced and the work efficiency can be improved.

  When the assembling work of the carrier and the extension housing is completed, the towing vehicle 30 is driven again, the assembly cart 10 starts to travel toward the second component supply space 56, and stops in front of the second component supply space 56. When the assembly cart 10 stops, the assembly operation of the valve body and the oil pan is performed. That is, the valve body is first assembled to the automatic transmission W in the state where the carrier and the extension housing are assembled, and then the oil pan is assembled. Also at this time, the worker can perform the assembly work of the parts with a very easy posture.

  When the assembly operation of the valve body and the oil pan is completed, the towing vehicle 30 is driven again, and the assembly cart 10 starts to travel toward the third component supply space 57 and stops in front of the third component supply space 57. When the assembly cart 10 stops, the assembly work of the oil pump is performed. That is, the oil pump is assembled to the automatic transmission W that is held by the assembly carriage 10 and in which the carrier, the extension housing, the valve body, and the oil pan are assembled. Also at this time, the worker can perform the assembly work of the parts with a very easy posture.

  When the assembly operation of the oil pump is completed, the tow vehicle 30 is driven again, and the assembly cart 10 starts to travel toward the fourth component supply space 58 and stops in front of the fourth component supply space 58. When the assembly cart 10 stops, the assembly operation of the case housing and the torque converter is performed. That is, the case housing and the torque converter are assembled to the automatic transmission W held by the assembly carriage 10 and assembled with the carrier, the extension housing, the valve body, the oil pan, and the oil pump. Also at this time, the worker can perform the assembly work of the parts with a very easy posture. Thus, the assembly of the automatic transmission W is completed.

  When the assembly of the automatic transmission W is completed after the case housing and the torque converter are assembled, the towing vehicle 30 is driven again, and the assembly cart 10 starts to travel toward the transfer space 59 and stops at the transfer space 59. To do. When the assembly cart 10 stops, the completed automatic transmission W is unloaded from the assembly cart 10 and conveyed to a subsequent process.

  As described above in detail, according to the assembly cart 10 according to the present embodiment, the center-of-gravity positions C of the automatic transmission W held by the clamp unit 20 are between the treads T of the wheels disposed at the four corners of the assembly cart 10. The clamp part 20 is arrange | positioned so that it may be located outside. Further, a battery 31 for driving the motor 33 of the towing vehicle 30 is provided at the end of the lateral frame 11a on the opposite side of the automatic transmission W held by the clamp unit 20 with respect to the fixed unit 20a of the clamp unit 20. Has been placed. Accordingly, the automatic transmission W is held in a state where more than half of the automatic transmission W protrudes from the lateral frame 11a in the assembly cart 10, while the weight balance in the assembly cart 10 is maintained to prevent the assembly cart 10 from falling. Thus, in the assembly cart 10, workability and safety are ensured.

  In the assembly cart 10, since the battery 31 and the control device 40 are attached to the vertical frame 11b, the towing vehicle 30 can be reduced in size, and the towing vehicle 30 is disposed below the horizontal frame 11a. Can do. Thereby, size reduction of the assembly cart 10 can be achieved.

  And, according to the production system 50 according to the present embodiment, various parts are assembled while conveying the automatic transmission W using the assembly cart 10 described above, so that it is smaller than a conventional production line using a conveyor. Automatic transmissions can be produced in space, and the system configuration can be easily changed in response to changes in the quantity and shape of automatic transmissions to be produced.

  It should be noted that the above-described embodiment is merely an example and does not limit the present invention in any way, and various improvements and modifications can be made without departing from the scope of the invention. For example, in the above-described embodiment, the case where the present invention is applied to the assembly process of an automatic transmission is illustrated, but the present invention is not limited to this, and can be applied to the assembly process of various products. In particular, it is preferable to apply the present invention when a heavy product is produced in a small variety of products.

DESCRIPTION OF SYMBOLS 10 Assembling cart 11 Frame 11a Horizontal frame 11b Vertical frame 12a Front wheel 12b Rear wheel 16 Pin receiving opening 20 Clamp part 20a Fixing part 22 Rotating mechanism 23 Lifting mechanism 30 Traction vehicle 31 Battery 35 Connecting pin 36 Retaining member 40 Control device C Center of gravity position T Wheel-to-wheel W Automatic transmission

Claims (5)

In an assembly cart equipped with a towing vehicle driven by a motor,
Wheels provided at the lower four corners of the bogie frame;
A clamp for holding the workpiece on the upper side of the frame;
A battery for driving the motor;
A control device for controlling the driving of the tow vehicle,
The clamp part is arranged so that the position of the center of gravity of the work is located outside the wheel while holding the work,
The battery is disposed on the frame on the side opposite to the work held by the clamp portion with respect to the fixing portion of the clamp portion to the frame,
The towing vehicle is disposed on the lower side of the frame and connected to the frame. The assembly cart according to claim 1,
The assembly cart, wherein the control device is disposed above the battery. In the assembly cart according to claim 1 or 2,
The towing vehicle has a connecting pin protruding upward,
The assembly cart, wherein the connecting pin is inserted into a pin receiving opening provided in the frame and is prevented from being removed from the pin receiving opening by a retaining member. In any one assembly trolley | bogie as described in Claims 1-3,
The clamp part is
A rotation mechanism for rotating the held workpiece;
An assembly cart having an elevation mechanism for raising and lowering a held workpiece. In the production system using any one assembly cart according to claim 1,
The traveling track of the tow vehicle is a circuit,
On the outside of the traveling track of the tow vehicle, a supply space for parts to be assembled to the work is provided,
A host computer that transmits a command for the towing vehicle is disposed inside the traveling track of the towing vehicle,
The assembly cart is arranged so that the clamp part faces the supply space side of the component,
The towing vehicle is controlled to travel along the traveling track and stop in front of a supply space for the parts based on a command from the host computer received by the control device. system.

Images