JPS62205875A - Conveying device for assembling car - Google Patents

Abstract

PURPOSE:To enable running of a running truck and prevent collision with a following running truck from behind even if the pin of the running truck is slipped off from the hole of a moving member, by a method wherein a stopper, making contact with the rear part of the running truck, is protruded from a moving member by which the running truck is run. CONSTITUTION:A car body 1 is conveyed in a manner to be placed on two support members 38 of a running truck 2. The running truck 2 has wheels 6 which are attached to the under surface of a base bed 4 and are placed on guide rails 14 installed on a floor surface 7, and a pin 12 is engaged with a hole 17 of an engaging member. With this state, a driving chain 13 is moved to run the running truck 2. In this case, when the pin 12 is slipped off from a hole 17 during running of the running truck 2, a stopper 15 attached to the driving chain 13 is forced into contact with the running truck 2 along with running of the driving chain 13. This constitution restarts running of the running truck 2, and prevents collision with a following running truck 2 from behind.

Description

[Detailed Description of the Invention] A1 Object of the Invention (1) Industrial Field of Application The present invention is directed to a vehicle in which a pin is provided protruding from a traveling vehicle capable of carrying a vehicle body and traveling along the transport direction of the traveling vehicle. The present invention relates to a transport device for automobile assembly, in which a moving member is provided with a recess into which the pin can be inserted.

(2) Conventional technology Conventionally, in such a conveyance device, an endless checker 7 as a moving member is made to travel along the conveyance direction, and a traveling cart is made to travel by simply inserting a pin into a recess provided in the checkerboard. ing.

(3) Problems to be solved by the invention However, there is a risk that the pin may fall out of the recess, and as a result, the following traveling truck collides with the stopped traveling truck, causing damage to the vehicle body on the traveling truck. I'm worried about it.

The present invention has been made in view of the above circumstances, and is intended to prevent the traveling bogie from stopping despite the pin falling out of the recess, and to prevent the vehicle body on the traveling bogie from being damaged due to a collision. It is an object of the present invention to provide a transport device for automobile assembly that can reliably prevent the above problems.

B9 Structure of the Invention (Means for Solving Problem 11) According to the present invention, the stopper that can come into contact with the rear part of the traveling cart along the transport direction is provided protruding from the moving member on the rear side along the transport direction rather than the recess. be done.

(2) Even if the working pin falls out of the recess, the stopper comes into contact with the traveling carriage, so that the traveling carriage continues to travel together with the moving member.
A rear-end collision with a following traveling bogie is avoided.

(3) Embodiment An embodiment of the present invention will be explained below with reference to the drawings. First, in FIGS. 1 and 2, during the assembly process of an automobile, a vehicle body 1 is placed on a traveling truck 2, and the vehicle body 1 is placed on a traveling truck 2. 2
The paper is transported in the transport direction 3 by. Moreover, each part is assembled to the car body 1 while being transported along the transport direction 3, and the car body 1 is assembled according to the assembly characteristics of those parts.
The vehicle body 1 is conveyed while being switched between an attitude in which the front and back directions are set in the transport direction 3 and a position in which the width direction is set in the transport direction 3, and the height of the vehicle body l on the traveling carriage 2 is also adjusted.

In FIG. 3, the traveling carriage 2 includes a rectangular base 4. As shown in FIG. This base 4 has a plurality of first wheels 5 lined up on two sides along the longitudinal direction of the base 4, and a plurality of first wheels 5 lined up on two sides in a direction orthogonal to the arrangement direction of the first wheels 5. and a second wheel 6 are respectively pivotally supported.

In FIG. 4, the first and second wheels 5 and 6 are arranged so that when each first wheel 5 is installed on the floor surface 7, each second wheel 6 is floating above the floor surface 7. will be established. This makes it possible to switch between a state where the base 4 is run in its longitudinal direction using the first wheels 5 and a state where the base 4 is run in its width direction using the second wheels 6.

Again in FIG. 1, in the middle of the conveyance direction by the traveling cart 2, ■ or a plurality of conversion positions P are set,
At this conversion position P, the direction of the traveling carriage 2, that is, the direction of the vehicle body 1 on the traveling carriage 2, is angularly displaced by 90 degrees.

For example, the traveling trolley 2 is made to travel to a conversion position P with its longitudinal direction aligned with the conveyance direction 3, and after being angularly displaced by 90 degrees at this conversion position P, its longitudinal direction is perpendicular to the conveyance direction 3. The driver resumes running in a relaxed posture.

In order to move the traveling carriage 2 to the conversion position P, a pair of first drive chains 8 are arranged along the conveying direction 3.

These first drive chains 8 are endless chains and are arranged parallel to each other. In addition, these first drive chains 8 are provided with screws in order to drive the traveling vehicle 2 while coming into contact with both ends of the base 4 in the longitudinal direction of the traveling vehicle 2 and sandwiching the traveling vehicle 2.
As shown in FIG. 5, the holding protrusions 9 and 10 are provided in a protruding manner with an interval between them. Further, guide grooves 11 are provided in parallel on the floor surface 7 between the paint brushes 1 and the drive chain 8, and the base 4
A pair of pins 12 projecting into the guide groove 11 are provided on the lower surface of both ends in the longitudinal direction.

Also, from the conversion position P, the second
A drive chain 13 is arranged parallel to the transport direction 3. Moreover, a pair of guide rails 14 are laid on the floor surface 7 in parallel with these second drive chains 13. These guide rails 14 are for guiding the second wheels 6 on which the traveling cart 2 is placed with its longitudinal direction perpendicular to the transport direction 3, and the second wheels 6 are placed on the guide rails 14. Sometimes the first wheel 5 is on the floor 7 as shown in FIG.
It will be in a floating state.

In FIGS. 7 and 8, a fitting member 18 having a hole 17 serving as a recess into which the bottle 12 of the traveling vehicle 2 is fitted is fixed to the second drive chain 13. Moreover, the second drive chain 1 is located on the rear side of the hole 17 along the conveyance direction 3.
3 is provided with a protruding stopper 15 that can come into contact with the rear end of the base 4 of the traveling carriage 2 along the conveyance direction 3.

Referring again to FIG. 4, a pit 19 is provided on the floor 7 at the conversion position P, and within this pit 19 is a rotary table 20 that can be moved up and down on which the traveling trolley 2 is placed and angularly displaced by 90 degrees. A rotary drive means 2 for driving the rotary table 20 through angular displacement.
1 and an elevating cylinder 22 as an elevating drive means for elevating the rotary table 20.

The rotary table 20 is formed into a disk shape, and a plurality of, for example, four, positioning cylinders 23 are arranged on the upper surface of the rotary table 20 at equal intervals around its vertical axis. Each positioning cylinder 23 is capable of expanding and contracting between a state in which its piston loft 23a protrudes upward from the upper surface of the rotary table 20 and a state in which it is retracted below the upper surface. Four fitting recesses 24 into which the four fittings can be fitted are provided on the lower surface of the base 4 of the traveling carriage 2.

Furthermore, a guide groove 25 that is continuous with the guide groove 11 on the floor surface 7 is provided on the upper surface of the rotary table 20 .

A shaft 26 protruding vertically downward from the central lower surface of the rotary table 20 is rotatably supported by a disk-shaped support plate 27 . Moreover, the lower surface of the rotary table 20 and the support plate 2
A plurality of rollers 28 are arranged between the upper surfaces of the rollers 7 .

An elevating cylinder 22 having a vertical axis is fixed on a bottom plate 29 fixed to the bottom of the pit 19, and the tip or upper end of the piston rod 30 of this elevating cylinder 22 comes into contact with the central lower surface of the support plate 27. Further, a plurality of guide tubes 31 surrounding the lifting cylinder 22' are erected on the bottom plate 29, and guide rods 32 projecting downward from the lower surface of the support plate 27 are slidably engaged with the guide tubes 31, respectively. Therefore, by the expansion and contraction operation of the lifting cylinder 22, the support plate 2
7, that is, the rotary table 20 moves up and down.

The rotation drive means 21 includes a motor 34 that is supported and fixed to a bracket 33 that projects laterally from a support plate 27 and has a vertical axis, and a drive that is fixed to the tip of the output shaft of the motor 34. A gear 35 and a driven gear 3 carved all over the outer peripheral surface of the rotary table 20 to mesh with the drive gear 35.
It consists of 6.

According to this rotation drive means 21, by operating the motor 34 for a certain period of time, the rotation table 20 can be rotated by 90 degrees.
It can be rotated only once.

A pair of cylindrical guide posts 37 are erected on the base 4 of the traveling truck 2 with an interval larger than the width of the vehicle body 1 in the longitudinal direction of the base 4. On the other hand, the left and right bottom portions of the vehicle body 1 are respectively received by receiving members 38, and these receiving members 38 are movable up and down along each guide post 37.

In FIG. 9, an elevating tube 39 is slid into the guide post 37, and a support member 40 is attached to the guide post 3 from the upper end of the elevating tube 39 protruding from the upper end of the guide post 37.
A receiving member 38 is fixed to the lower end of the supporting member 40 .

A nut 41 is fixed to the lower end of the elevating cylinder 39, and a screw shaft 42 is screwed into the nut 41. A guide member 43 that can slide inside the elevating cylinder 39 is fixed to the upper end of the screw shaft 42 , and the guide member 43 is fixed to the upper end of the screw shaft 42 .
A first bevel gear 44 is fixedly installed at the lower end of 2.

In FIG. 1O, a groove 45 extending in the axial direction is provided on the inner surface of the guide post 37 over its entire length, and a protrusion 46 that slides into the groove 45 is provided on the outer surface of the elevating cylinder 39. As a result, the elevating tube 39 is prevented from rotating around the axis, but is allowed to move in the axial direction, and therefore the elevating tube 39 moves up and down in accordance with the rotational movement of the screw shaft 42. Moreover, the support member 4 is attached to the elevator tube 39.
Since the receiving member 38 is connected through the screw shaft 42, the receiving member 38 moves up and down in accordance with the rotational movement of the screw shaft 42.

The lower end of the guide post 37 protrudes into the base 4, and a gear box 47 is fitted into and fixed to the lower end of the guide post 37. A first bevel gear 44 is rotatably supported within this gear box 47 . A support tube 48 extending inward of the base 4 is connected to the side of the gear box 47, and a second support tube 48 is rotatably supported by the support tube 48.
A bevel gear 49 meshes with the first bevel gear 44 within the gearbox 47 .

A drive source (not shown) is mounted inside the base 4 between both guide posts 37, and a transmission shaft 5 connected to the drive source is mounted.
0 is coaxially connected to the second bevel gear 49. As a result, both receiving members 38 move up and down in accordance with the operation of the drive source.

Next, the operation of this embodiment will be explained. The vehicle body 1 is placed on both receiving members 38 of the traveling truck 2.

In this state, the traveling trolley 2 travels to the conversion position P with the longitudinal direction of the vehicle body l orthogonal to the transport direction 3. That is, both clamping protrusions 9.
The traveling trolley 2 sandwiched between the 10 and 10 moves to the conversion position P while transferring the first vehicle 5 on the floor 7. At this time, pin 12 is the guide? Since it is guided by n11, the traveling direction of the traveling trolley 2 does not deviate.

When the traveling carriage 2 reaches the conversion position P, the positioning cylinder 23 is extended and the tip of the piston rod 23a fits into the positioning recess 24, and the rotary table 20 of the traveling carriage 2 is moved.
Positioning is done on the top.

Next, the rotary table 20 is raised by the extension operation of the lifting cylinder 22, the pin 12 is removed from the guide groove 11, and the first carriage 5 is also lifted off the floor 7.

Therefore, the rotary table 20 is rotated by the rotation drive means 21.
The rotary table 20 is angularly displaced by 0 degrees and lowered.

As a result, each second wheel 6 is placed on the guide rail 14, and the pin 12 is fitted into the hole 17 of the fitting member 1B.

As soon as it is detected that the pinwheel 2 is fitted into the hole 17 and the second wheel 6 is on the guide rail 14, the second drive chain 13 starts running, and the traveling bogie 2
starts traveling forward along the transport direction 3 with the front-rear direction of the vehicle body 1 aligned with the transport direction 3.

Assume that the pin 12 falls out of the hole 17 for some reason while the traveling trolley 2 is traveling in this manner. In this case, the traveling bogie 2 stops despite the running of the second drive chain 13, but the stopper 15 of the second drive chain 13 comes into contact with the traveling bogie 2, so that the traveling bogie 2
will resume running. Therefore, a rear-end collision with the following traveling bogie 2 is avoided, and even if the vehicle body 1 is protruding from the traveling bogie 2, the vehicle bodies 1 on the front and rear traveling bogies 2 are prevented from colliding with each other and being damaged. It can be prevented.

In this way, the car body 1 can be moved by changing its direction in 90 degree increments, and it is also possible to move the car body 1 up and down. The orientation and height can be selected, improving assembly work efficiency.

In the above embodiment, the pin 12 is fixedly protruded from the traveling carriage 2, but the pin 12 may be protruded by a cylinder or the like when connected to the second drive chain 13.

C0 Effects of the Invention As described above, according to the present invention, the stopper that can come into contact with the rear part of the traveling cart along the conveyance direction is provided protruding from the moving member at the rear side along the conveyance direction rather than the recess, so that the pin can Even if the vehicle falls out of the recess, the stopper can push the vehicle, preventing a rear-end collision with a subsequent vehicle and preventing damage to the vehicle body.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall plan view, FIG. 2 is a side view of FIG. 1, FIG. 3 is an enlarged plan view of the traveling truck, and FIG. FIG. 5 is an enlarged sectional view taken along the line V-V in FIG. 1, and FIG.
-Vll line large sectional view Figure 7 is an enlarged side view of the second drive chain, Figure 8 is a plan view of Figure 7, Figure 9 is the IX of Figure 3.
10 is an enlarged sectional view taken along the line X--X of FIG. 9. 1... Vehicle body, 2... Traveling trolley, 3... Conveyance direction,
12... Pin, 13... Second drive chain as a moving member, 15... Stopper, 17... Hole as a recessed part.

Claims (1)

[Claims] In a transportation device for automobile assembly, a pin is provided protruding from a traveling trolley capable of carrying a vehicle body and traveling along the transportation direction, and a recess into which the pin can be inserted is provided on a movable member capable of traveling along the transportation direction of the traveling vehicle. 1. A transport device for automobile assembly, characterized in that a stopper that can come into contact with the rear part of a traveling truck along the recess is provided in a protruding manner on the movable member at a rear side along the transport direction with respect to the recess.