JPH0215852Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a conveyance device used, for example, in a car body assembly process.

Conventional technology In the car body assembly process, such as the floor main welding assembly process, plain shuttle conveyors and lift and carry conveyors are used (for example, Automotive Engineering Complete Book Volume 19 "Automobile Manufacturing Methods",
(April 20, 1982), Sankaido, P177). Generally, these plain shuttle conveyors or lift and carry conveyors are not used alone throughout the entire process, but are used in combination depending on the type of work such as welding.

Problems to be solved by the invention However, since the plain shuttle conveyor and lift & carry conveyor described above have separate and independent configurations, each conveyor requires a separate drive device, and the plain shuttle conveyor Transfer equipment such as a loader or lifter is required to transfer the vehicle body from a lift and carry conveyor to a plain shuttle conveyor, or from a lift and carry conveyor to a plain shuttle conveyor, making the entire facility large-scale.

The present invention aims to provide a conveying device that requires only one drive device when using a plain shuttle conveyor and a lift and carry conveyor in combination, and that eliminates the need for separate transfer devices such as loaders and lifters. It is something to do.

Means for Solving the Problems In the present invention, first, a plain shuttle conveyor includes a first shuttle bar that is disposed astride between a plurality of first stages and is movable forward and backward in the conveyance direction; The object to be conveyed, which is provided on each first stage and has been conveyed by the first shuttle bar, is pushed up above the first shuttle bar and positioned at the working position, while the object to be conveyed after the work is returned to the first shuttle bar. The structure includes a first lifter device for transferring the load onto the shuttle bar.

The lift and carry conveyor also includes a second shuttle bar disposed across a plurality of second stages and capable of moving forward and backward in the conveying direction, and a second shuttle bar provided on each of the second stages. A fixed positioning jig is provided on the second shuttle bar to position the object being transported by the second shuttle bar, and a fixed positioning jig is provided on the second shuttle bar to support the object during transportation, and in the second stage, the object is The structure includes a second lifter device that transfers the transported object to the positioning jig and uses it for a predetermined work, and lifts the transported object again from the positioning jig by its lifting operation after the work is completed.

Then, the plain shuttle conveyor and the lift and carry conveyor are arranged on the same axis with the lift and carry conveyor on the upstream side in the conveying direction, and the first shuttle bar of the plain shuttle conveyor and the lift and carry conveyor are arranged on the same axis. The second shuttle bar of the conveyor is integrally connected to the conveyor, and a single drive device is provided for moving the first and second shuttle bars connected to each other forward and backward.

Function According to this structure, the lift-up and lift-down operations of the conveyed object, such as a car body, are performed using separate types of lifter devices for each plain shuttle conveyor and lift and carry conveyor, while the transfer operation of the conveyed object, The forward and backward movements of both shuttle bars are performed integrally by the same drive device, so not only is there no need for a separate transfer device when transferring objects between both conveyors. , only one drive device is required.

Embodiment FIGS. 1 to 3 are diagrams showing a specific embodiment of the present invention, and in particular, FIG. 1 shows its overall configuration.

In FIG. 1, 1 is a plain shuttle conveyor provided on the downstream side of the connecting portion 1a in the conveyance direction of the vehicle body B, which is an object to be conveyed, and 2 is a plain shuttle conveyor provided at the connecting portion 1a.
A lift and carry conveyor is installed on the same axis as the plain shuttle conveyor 1 upstream of the plain shuttle conveyor 1 as a boundary, and each of these conveyors 1 and 2 has three first stages for convenience.
Only stages S ₁₁ to S ₁₃ and second stages S ₁ to _{S 3} are shown.

As shown in FIG. 2, the plain shuttle conveyor 1 includes a floor-mounted first lifter device 3 provided at each of the first stages _S11 to _S13 , and a first lifter device 3 installed at each of the first stages _S11 to S13. ₁₃ , a pair of horizontal first shuttle bars 4, and a drive device 5 that moves the first shuttle bars 4 forward and backward.

The first lifter device 3 includes a lift cylinder 6
and a lifter plate 7 which is attached to the tip of the piston rod 6a of the lift cylinder 6 and moves up and down by the action of the lift cylinder 6. A positioning jig 8 is provided on the lifter plate 7 for positioning the vehicle body B. ing.

On the other hand, the first shuttle bar 4 is provided with fingers 9 at positions corresponding to each of the first stages _S11 to _S13 , and a rack 10 is provided over a predetermined length at a position corresponding to the drive device 5. is formed. This rack 10 is engaged with a pinion 11 on the drive device 5 side, and the pinion 11 is driven in forward and reverse directions to move the shuttle bar 4 forward or backward.

In other words, if we consider only the plain shuttle conveyor 1, as shown in FIG.
is received, the vehicle body B is pushed up to the work position, which is the upper limit position of the lifter plate 7, and a predetermined welding work is performed using, for example, the multi welding device 12.

After the welding work is completed, the lifter plate 7 of the first lifter device 3 moves downward to transfer the vehicle body B again to the finger 9 of the first shuttle bar 4, and the first shuttle bar 4 moves forward to move the vehicle body B is transported to the next stage, and the above operations are repeated thereafter. Note that the first shuttle bar 4 returns to its original position during the above-mentioned welding operation.

The lift and carry conveyor 2 includes frames 13 of each second stage S ₁ to _{S 3} as shown in FIG.
A fixed positioning jig 14 erected on the
It includes a pair of horizontal second shuttle bars 15 that are shared by each of the second stages S ₁ to _{S 3} .

This second shuttle bar 15 is integrally connected to the first shuttle bar 4 on the plain shuttle conveyor 1 side at the connecting portion 1a, while the third
As shown in the figure, a movable second lifter device 16 is provided at a position corresponding to each of the second stages S ₁ to S ₃ . This second lifter device 16 consists of a lift cylinder 17 and a lifter plate 18 attached to the tip of the piston rod 17a of the lift cylinder 17, as described above.

Therefore, the lift and carry conveyor 2 is
As shown in FIG. 3, when the lifter plate 18 of the second lifter device 16 on which the vehicle body B is mounted moves downward, the vehicle body B on the lifter plate 18 is transferred to the fixed positioning jig 14, and the second When the lifter device 16 is under no load, a predetermined welding operation is performed by, for example, a floor-mounted welding robot 19.

Then, after the welding work is completed, the lifter plate 18 of the second lifter device 16 moves upward, so that the lifter plate 18 receives the vehicle body B again, and while the second lifter device 16 remains in the upward movement, the second shuttle bar 15 moves forward to transport the vehicle body B to the next stage, and thereafter the same operation as above is repeated. Note that the second shuttle bar 15 returns to its original position during the above-mentioned welding operation.

At this time, the second shuttle bar 15 does not have its own drive device, and moves forward or backward together with the first shuttle bar 4 on the plain shuttle conveyor 1 side by the drive device 5 on the plain shuttle conveyor 1 side. Therefore, the transfer of the vehicle body B from the second stage S ₃ to the first stage S ₁₁ is performed directly, like transfer between stages of a single conveyor.

In other words, according to this embodiment, although the welding work and the type of lifter device that controls the lifting and lowering operations of the vehicle body B are completely different, both conveyors 1 and 2 are completely different from each other.
Since the forward and backward movements of the first and second shuttle bars 4 and 15 are performed integrally, only one drive device is required, and another transfer device is required to transfer the vehicle body B between both conveyors 1 and 2. does not require.

Effects of the invention As described above, according to the invention, the shuttle bar of the plain shuttle conveyor and the shuttle bar of the lift and carry conveyor are connected to each other so that they can move forward and backward in an integrated manner. In addition to requiring only one drive unit,
It becomes possible to directly transfer objects between both conveyors, and there is no need to provide a separate transfer device. As a result, the equipment can be downsized and the space it occupies can be reduced.

[Brief explanation of drawings]

FIG. 1 is an overall explanatory diagram showing an embodiment of the present invention;
2 is a sectional view taken along the - line in FIG. 1, and FIG. 3 is a sectional view taken along the - line in FIG. 1. 1...Plain shuttle conveyor, 1a...Connection section, 2...Lift & carry conveyor, 3...
First lifter device, 4... First shuttle bar, 5... Drive device, 14... Positioning jig, 1
5...Second shuttle bar, 16...Second lifter device, _S1 - _S3 ...Second stage, _S11 - _S12
...First stage, B...Vehicle body as a transported object.

Claims (1)

[Claims for Utility Model Registration] A first shuttle bar disposed astride between a plurality of first stages and capable of moving forward and backward in the conveyance direction; a first lifter device that pushes up the transported object transported by the shuttle bar above the first shuttle bar and positions it at a working position, and transfers the transported object again onto the first shuttle bar after the work is completed; A plain shuttle conveyor consisting of; a second shuttle bar disposed astride between a plurality of second stages and capable of moving forward and backward in the conveyance direction; A fixed positioning jig is provided on the second shuttle bar to position the object being transported by the second shuttle bar, and a fixed positioning jig is provided on the second shuttle bar to support the object during transportation, and in the second stage, the second stage is provided with a fixed positioning jig for positioning the object being transported by the second shuttle bar. The lift and carry device is composed of a second lifter device that transfers the transported object to the positioning jig and uses it for a predetermined work, and then lifts the transported object out of the positioning jig again by its lifting operation after the work is completed. a conveyor, wherein the plain shuttle conveyor and the lift & carry conveyor are arranged on the same axis with the lift & carry conveyor on the upstream side in the conveying direction, and a first shuttle bar of the plain shuttle conveyor; 1. A conveyance device comprising a single drive device which integrally connects a second shuttle bar of a lift and carry conveyor and moves the first and second shuttle bars connected to each other forward and backward.