JPH0116719B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a conveyance device for automobile assembly, and particularly to a conveyance device used in the process of mounting an engine on the body of an automobile. Conventionally, in such a conveying device, as shown in FIG. 1, the assembled engine E is suspended by a hanger 1 and conveyed to the top of a slat conveyor 3 by an overhead conveyor 2, and then installed on the slat conveyor 3. The engine E is transferred onto a transfer jig 4, and while being transported by the slat conveyor 3, parts around the engine E are attached. On the other hand, the body B that has been outfitted is being transported by the overhead transport conveyor 5, and while the overhead transport conveyor 5 is moving synchronously on the slat conveyor 3, the engine is moved by the transfer jig 4. Engine E is lifted and engine E is attached to body B. Next, the overhead conveyor 5
The assembly of the suspension of body B being transported by
After this is carried out along with the movement of the overhead transport conveyor 5, the assembled automobile is transferred onto the slat conveyor 6 which is synchronized with the overhead transport conveyor 5. The interior of the automobile transported by the slat conveyor 6 is assembled and filled with oil such as gasoline, and the assembly of the automobile is finally completed. However, such conventional devices have the following drawbacks. That is, (a) each conveyor 2,
It is necessary to drive all 3, 5, and 6 in synchronization.
The synchronization adjustment is complicated. (b) Line speed is determined by the time it takes to attach the engine to the body, making it impossible to handle increased production. (c)
Since the engine E is attached to the body B while the engine transfer slat conveyor 3 runs parallel to the body transfer overhead conveyor 5, it is necessary to install the slat conveyor 3 for a long time. 3 is endless, it is necessary to provide a large number of transfer jigs 4, and therefore the installation space becomes large. (d) for power supply;
Connection work with the power source must be performed for each transfer jig 4, which is complicated. (e) The work of attaching the engine E to the body B requires a worker to walk in accordance with the running of the overhead conveyor 5 and the slat conveyor 3, resulting in a large amount of work loss. The present invention was made in order to eliminate these conventional drawbacks, and it is possible to cope with increased production by reducing the number of points that require synchronization adjustment to only one place and by increasing the running speed of some conveyors. We have developed a transportation device for automobile assembly that can reduce the installation space, eliminate the need to connect a power source with a transfer jig, and allow the installation of the engine to the body in a stationary state. The purpose is to provide. Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. First, in FIG.
Install engine E to. It is used in the engine mounting process, and includes a tact transport conveyor 10 for body transport, a continuous transport conveyor 11 for body transport, and a pair of feeders 12 and 13 for transferring the body B between both conveyors 10 and 11.
, an engine transport conveyor 14 for transporting the body B after the engine installation is completed, an engine transport conveyor 15 for transporting the engine E to be installed on the body B, and a single engine transfer jig 16. 15 and an engine transfer conveyor 17 for transporting the engine E transported by the tact transport conveyor 10 to the position of the body B transported by the tact transport conveyor 10. The tact conveyor 10 for body conveyance is an overhead conveyor, and the engine mounting position 18
The entrance side 10a to the engine mounting position 18 and the engine mounting position 1 are arranged in an endless manner through the engine mounting position 18.
The exit sides 10b from 8 are arranged parallel to each other. This tact conveyor 10 can freely switch between a conveying state and a stopped state of the body B, and when the body B is conveyed to the engine mounting position 18, its movement is temporarily stopped and the engine mounting position is stopped. Movement will resume after completion. The continuous conveyor 11 for body conveyance is an overhead conveyor, and has an inlet section 11a located on an extension line of the inlet side 10a of the tact conveyor 10 and an extension line of the outlet side 10b of the tact conveyor 10. Unloading section 11
b, and are arranged in an endless manner. One feeder 12 is the continuous conveyor 1
1 carrying-in section 11a and the tact conveyor 10
The other feeder 13 is arranged between the outlet side 10b of the tact conveyor 10 and the output section 1 of the continuous conveyor 11.
1b. The carry-out conveyor 14 is a slat conveyor, and is arranged to partially overlap the carry-out section 11b of the continuous conveyor 11, and is driven in synchronization with the continuous conveyor 11. A transfer position 19 is set close to the engine mounting position 18, and the engine transport conveyor 15 is disposed in an endless manner passing through the transfer position 19. Moreover, this engine conveyor 15
is an overhead power and free conveyor, and the hanger 20 for suspending the engine E is temporarily stopped when it reaches the transfer position 19. Therefore, the engine E can be transferred from the hanger 20 during this time. Referring also to FIG. 3, the engine transfer conveyor 17 has a transfer position 19 and an engine mounting position 18.
This engine transfer conveyor 17 is an endless bellows conveyor disposed between the engine transfer conveyor 17 and the engine transfer conveyor 17, which is reciprocated by a drive means 21. Furthermore, in the middle of the engine transfer conveyor 17, there is an engine transfer conveyor 17 for transferring the engine E from the engine transfer conveyor 15 and lifting it to a predetermined position on the body B in order to attach the engine E to the body B at the engine installation position 18. A jig 16 is provided. The engine transfer jig 16 includes, for example, a mounting table 24 provided at the upper end of a piston rod 23 of a pneumatic cylinder 22 that extends vertically.
2 passes through the engine transfer conveyor 17 and is fixed to the conveyor 17 along the way. The driving means 21 includes a driving unit 26 such as a motor and a speed reducer having a driving shaft 25 extending vertically, a rotating arm 27 having one end fixed to the driving shaft 25 and extending horizontally, and one end parallel to the driving shaft 25. A connecting rod 29 is connected to the other end of the rotating arm 27 via a pin 28 and extends horizontally; A lower rack 31 is fixed to a lower support stand 30 provided, and a gear 3 is pivotally supported by the other end of the connecting rod 29 and meshes with the lower rack 31.
2, and an upper rack 34 that is supported by an upper support stand 33 fixed parallel to the lower rack 31 so as to be movable in the longitudinal direction and meshes with the gear 32 from above. Ingredients 16
The lower end of the pneumatic cylinder 22 is connected to the lower end of the pneumatic cylinder 22 . In this drive means 21, the drive shaft 25 of the drive section 26 reciprocates over a range of 180 degrees.
As a result, the gear 32 reciprocates on the lower rack 31 via the rotating arm 27 and the connecting rod 29,
In response to this movement of gear 32, upper rack 34 reciprocates at a speed greater than the amount of movement of gear 32.
In response to the reciprocating movement of the upper rack 34, the engine transfer conveyor 17 and the engine transfer jig 16 reciprocate. As shown in FIG. 4, the moving speed of the engine transfer conveyor 17 and the engine transfer jig 16 is set to be relatively slow at the start and stop of the movement, and relatively fast in the middle. Set. By doing this, the engine transfer jig 16
It is possible to prevent the engine E placed thereon from falling, and also to prevent accidents such as falling due to sudden movement start and sudden stop when a worker gets on the engine transfer conveyor 17. Moreover, the average speed of the engine transfer conveyor 17 is set faster than the conveyance speed of the continuous body conveyance conveyor 11 and the discharge conveyor 14, and
The ratio of moving speeds of is kept constant. Next, to explain the operation of this embodiment, the fully equipped body B is transferred from the carry-in section 11a of the continuous conveyor 11 to the input side 10a of the tact conveyor 10 via the feeder 12. When the body B reaches the engine mounting position 18 on this tact transport conveyor 10, the tact transport conveyor 10 automatically stops transporting. On the other hand, the engine E is suspended from the hanger 20 and transported to the transfer position 19 by the engine transport conveyor 15, and is stopped at the transfer position 19. Therefore, the engine transfer conveyor 17 is driven to bring the engine transfer jig 16 directly below the engine E at the transfer position 19, the mounting table 24 is raised, and the engine E is transferred from the hanger 20 onto the mounting table 24. I will post it. Next, after lowering the mounting table 24, the engine transfer conveyor 17 is driven to move the engine transfer jig 16 to the engine mounting position 18. At the engine mounting position 18, the mounting table 24 is driven upward again, and the engine E on the mounting table 24 is assembled to a predetermined position of the body B.
is lowered. When the engine E is installed in this manner, the movement of the tact conveyor 10 is started, and the body B is transferred from the exit side 10b of the tact conveyor 10 to the conveyance section 11b of the continuous conveyor 11 via the feeder 13. While being conveyed by this continuous conveyor 11, assembly work for the suspension of the body B is performed. Next, the body B is transferred to the carry-out conveyor 14, which is driven to run in synchronization with the continuous conveyor 11, and is carried out. Table 1 shows a comparison of the working time in such a body mounting process between the process of the present invention and the conventional process.

[Table] As is clear from Table 1, the working time is shorter with the device of the present invention, but in Table 1, the “actual work loss time” is 5 seconds with the conventional device, but with the device of the present invention. is 0 seconds because conventionally the engine was attached to the body while walking, but with the present invention the engine can be attached while standing still. Furthermore, the "setup work time" is shortened because, whereas conventional work required connecting power sources to multiple transfer jigs, the present invention does not require such work. be. Furthermore, the "engine unloading time" is shortened because, whereas conventionally it was necessary to unload the engine between a pair of synchronized conveyors, with the present invention, the engine can be unloaded in a stationary state. It is. As described above, the apparatus of the present invention includes a tact conveyor for body conveyance that is arranged in an endless manner passing through the engine mounting position and can be switched between running and stopping; a continuous conveyor for conveying bodies, which has an inlet part and an outlet part on the extension line of the side and is arranged in an endless manner; between the inlet part and the inlet side of both conveyors;
and a pair of feeders for body delivery between the output side and the unloading section; an engine transport conveyor that is arranged endlessly through a transfer position close to the engine mounting position and can be stopped at the transfer position;
an engine transfer conveyor that is provided with an engine transfer jig and is arranged between the transfer position and the engine mounting position and is capable of relatively high-speed bidirectional movement;
Since it includes, the following effects can be achieved. (a) It is only necessary to perform synchronization adjustment between the body transport conveyor and the transport conveyor for carrying out the bodies in succession, and the synchronization adjustment becomes easy. (b) It is possible to increase the running speed of the engine transfer conveyor, and thereby it is possible to cope with increased production even though the engine installation time remains the same as before. (c) Since the engine transfer conveyor only needs to be placed over a relatively short distance between the engine mounting position and the transfer position, and there is only one engine transfer jig, the installation space can be reduced. (d)
No need to supply power to the engine transfer jig. (e) Since the work of attaching the engine to the body is done in a stationary state, work loss is reduced.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the layout of a conventional device, FIGS. 2 to 4 are diagrams showing an embodiment of the present invention, FIG. 2 is a diagram showing the overall layout of the device of the present invention, and FIG. FIG. 4 is a longitudinal sectional view of the engine transfer conveyor, and FIG. 4 is a graph showing the running characteristics of the engine transfer conveyor. 10... Tact transport conveyor for body transport, 11
...Continuous transport conveyor for body transport, 12, 13...
Feeder, 14... Carrying out conveyor, 15... Engine carrying out conveyor, 16... Engine transfer jig, 17...
Engine transfer conveyor, 18...Engine mounting position, 19...Transfer position, B...Body, E...Engine.

Claims (1)

[Claims] 1. A tact transport conveyor for body transport which is arranged in an endless manner passing through the engine mounting position and can be switched between running and stopping; an inlet section and an unloader are provided on the extension line of the entrance and exit sides of the conveyor to the engine mounting position. a continuous conveyor for conveying bodies arranged in an endless manner, each having a section; a pair of feeders for transferring bodies between an inlet section and an inlet side, and between an outlet side and an output section of both conveyors; and the engine; an engine transfer conveyor that is arranged in an endless manner through a transfer position close to the mounting position and can be stopped at the transfer position; an engine transfer conveyor that is provided with an engine transfer jig and is arranged between the transfer position and the engine mounting position; A conveyance device for automobile assembly, comprising: an engine transfer conveyor capable of bidirectional movement at relatively high speeds.