JPS6318532Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transport vehicle for transporting objects such as automobile bodies between jig processes with height differences.

On processing lines for automobile bodies, etc., there may be height differences between different processing steps.
Conventionally, a device as shown in FIGS. 1 and 2 has been used to transport an automobile body or the like between such processing steps. That is, a hoist guide rail 1 is laid on the ceiling of the conveyance line, and a hoist 2 reciprocates along this hoist guide rail 1.
Hanger 3 was attached to it. The hanger 3 has hanger arms 3a, 3 at opposing positions on both sides thereof.
The hanger arm 3 has a hanger arm 3 which can be opened and closed freely, and which engages the ceiling of the automobile body 4 which is the object to be transported.
It will be suspended from the hanger 3 by a, 3a, . . . Then, the automobile body 4 is transported to the next process by the hoist 2 moving along the hoist guide rail 1, and if there is a height difference between the previous process and the next process, the hanger 3 is moved by the hoist 2. Conveyance is performed while moving vertically. In addition, in FIG. 2, 5 indicates an electric motor for vertically displacing the hanger 3.

However, in the conventional conveying device described above,
Since the conveyed object is suspended by the hanger arms 3a, 3a, ..., if the length or weight of the conveyed object is large, the conveyed object and the hanger arms 3a, 3a,
This results in deformation of the engaging portion with... and has a negative effect on the quality of its appearance. Particularly, when the object to be transported is the automobile body 4, engaging the hanger arms 3a, 3a with the roof portion, which has a low structural strength, often causes the above-mentioned drawbacks. This is because the automobile body 4 is originally designed to have strength when supported on the floor. In addition, since the above-mentioned conventional transport device has a structure in which the transported object is suspended, the hanger arm is adjusted so that the suspended transported object has a good balance depending on the weight and length of the transported object. 3a, 3a, . . . and a fall prevention safety device is required to prevent the suspended objects from falling. Therefore, the configuration becomes complicated and at the same time, it may be unfavorable in terms of work safety. Furthermore, in the conventional conveying device described above, the hoist guide rail 1 must be installed on the ceiling of the conveying line, which may cause interference with other devices in the factory (for example, gun transformers, other hanger devices, etc.). In addition, if the hanger 3 is large, the free space of the factory building will be unduly reduced, and construction costs will also increase.

Therefore, in order to eliminate the various drawbacks of the above-mentioned conventional devices, it is conceivable to attach a jacking device to the transport vehicle and use the jacking device to lift and transport the object. However, even in such a conveying device, since the cart moves, it is impossible to use air or the like as a working fluid to operate the jacking device, and a manual jacking device must be used. Therefore, this results in a disadvantage of low productivity.

The purpose of this invention is to make it possible to transport objects between jig processes with height differences without impairing the appearance quality of the objects, and to ensure safe transportation regardless of the type of object. The purpose of the present invention is to provide a transport vehicle that is transportable, has a simple structure, and has high productivity.

The transport vehicle of the present invention that meets this purpose has the following structural features. That is, the main body of the carrier can be positioned and fixed at a desired position on the processing line using a fixing device such as a brake or a stopper. This truck body is provided with a fluid-operated lift device operated by pneumatic pressure, hydraulic pressure, etc., and the lifting deck is moved up and down by this lift device. Since the lifting deck supports the floor surface of the transported object and lifts and lowers the transported object, the appearance quality of the transported object is not impaired and safe transport is possible even for various types of transported objects. It becomes possible. next,
The truck body is provided with a truck side joint device for supplying working fluid to the lift device from the outside.
This truck-side joint device can be combined with other truck-side joint devices installed in each jig process. The truck-side joint device is provided with a fluid supply port for supplying working fluid to the lift device. This fluid supply port is connected to a fluid supply/discharge port of the lift device by a fluid supply system line with a check valve interposed therebetween, and the fluid supply/discharge port is connected to a fluid discharge control port attached to the fluid discharge system line. The pilot check valve is connected to the pilot check valve. The inflow port of the pilot check valve is connected to the fluid supply system downstream of the check valve by a fluid discharge system, and the outflow port of the pilot check valve is opened to the atmosphere. As described above, the transport vehicle of the present invention has a simple structure and at the same time has high productivity because it uses a fluid-operated lift device.

An embodiment of the present invention is shown below in Figures 3 to 10.
This will be explained based on the diagram.

In Fig. 3, there is a conveyor rail 6 in between the process.
are laid, and wheels 9, 9, . . . attached to the main body 8 of the transport vehicle 7 are engaged with the transport rail 6. A fluid-operated lift device 1 is mounted on the trolley body 8.
0 and 10 are fixed, and a lifting deck 11 is attached to the upper part of the lift devices 10 and 10. Cross links 12, 12, . . . are interposed between the lifting deck 11 and the truck body 8, and as shown in FIG.
are rotatably connected by a shaft 13. One end of the member 12a is connected to the elevating deck 11 by a shaft 14.
A roller 16 is attached to the other end of the member 12a via a shaft 15.
The roller 16 is engaged with the truck body 8 and can freely roll in the direction BB'. On the other hand, member 12
One end of the member 12b is rotatably attached to the truck body 8 by a shaft 17, and a roller 19 is attached to the other end of the member 12b via a shaft 18. roller 19
is engaged with the elevating deck 11 and can freely roll in the B-B' direction like the rollers 16. Therefore, the cross links 12, 12, . . . allow the lifting deck 11 to move up and down while remaining parallel to the truck body 8.

In FIG. 9, lift devices 10, 10 are constructed with a hollow body made of a flexible material, and fluid supply/discharge ports 10a, 10a are formed at the lower side of the hollow body. The fluid supply/discharge ports 10a, 10a are connected to the truck side joint device 2 via the fluid supply line 20.
1 fluid supply port 21a. A check valve 22 and a regulator 23 for controlling the flow rate are installed in series in the liquid supply line 20, and the truck-side joint device 21 is fixed to the truck body 8. The truck side joint device 21 also includes:
A pilot fluid supply port 21b is formed, and this pilot fluid supply port 21b is connected to a pilot port 24a of a pilot check valve 24, which is fluid discharge control means. The inflow port 24b of the pilot check valve 24 is connected to a fluid discharge line 26 with a regulator 25 for controlling the flow rate.
It is connected to the fluid supply system line 20 via the fluid supply line 20, and the connection part thereof is located downstream of the check valve 22 and the regulator 23. On the other hand, the outflow port 24c of the pilot check valve 24 has a muffler 2 for muffling.
7 is attached, and the air flowing out from the outflow port 24c is muffled by the muffler 27 and then discharged into the atmosphere.

Next, the air supply unit 28 for supplying air to the lift devices 10, 10 via the truck-side joint device 21 will be explained. The air supply unit 28 has an outside-truck joint device 30 which is moved up and down by a cylinder device 29, and the outside-truck joint device 30 is installed at each process. The bogie external joint device 30 connects the piston rod 29a of the cylinder device 29 to the connector 29b.
The operating direction of the cylinder device 29a is controlled by a switching valve 32. 31,
31 indicates a guide rod (see FIG. 10).
Fluid supply port 30 of joint device 30 outside the truck
a is a low-pressure line 33 and a high-pressure line 34 that branch off in the middle;
The air supply source 35 is connected to an air supply source 35 which is a liquid supply source. A two-way valve 36 and a regulator 37 set to low pressure are interposed in the low-pressure line 33, and a two-way valve 38 and a regulator 39 set to high pressure are interposed in the high-pressure line 34. . 40 indicates a filter. On the other hand, the joint device 3 outside the bogie
The pilot fluid supply port 30b of No. 0 is connected to the high pressure system 34 via the pilot fluid supply system 41, and the pilot fluid supply system 41 is connected to the two-way valve 4.
2 is interposed.

Now, in order to position and fix the transport vehicle 7 in the process shown in FIG. Shock absorbers 44, 44 are attached to the front and rear of the truck body 8, respectively.
In addition, trolley locks 45, 45, which are fixing devices for the trolley body, are provided in the process.
45, the carriage 7 is positioned and fixed at a desired position in the process. Instead of the carriage locks 45, 45, the carriage 7 may be provided with a braking device (not shown). In addition, lifter cylinders 4 for changing the body are installed on both sides of the process transport rails 6, 6.
6, 46, . . . are arranged. As shown in FIG. 7, stopper devices 47, 47 for controlling the lifting height of the lifting deck 11 are disposed in the process, and the stopper device 47 consists of a cylinder device buried in the floor 48. There is.

The action will be explained below.

First, the empty carrier 7 is moved to the lift devices 10, 10.
It is transported from process to process in a state in which all the air inside it has been exhausted (state a in Figure 6). Then, the carriage 7 causes the shock absorber 44 to collide with the fixed stopper 43 and stops below the automobile body 14 in the process. Then, the stopper device 4
7, 47 rises, and when the rise is confirmed, the cylinder device 29 operates and the bogie external joint device 3
Increase 0. The elevated joint device 30 outside the truck is connected to the joint device 21 on the truck side, and the two-way valve 36 is opened to supply low pressure air from the fluid supply port 30a to the fluid supply port 21a.
The supplied low-pressure air passes through the check valve 22 of the fluid supply line 20, is speed-controlled by the regulator 23, and then flows into the lift devices 10, 10. As a result, the lift devices 10, 10 are actuated to raise the lifting deck 11, but when the lifting deck 11 rises to the position b in FIG.
7 and the shafts 15, 15 of the cross link 12 engage with each other, so that the lifting deck 11 stops rising. In this state, indoor work on the automobile body 4 is performed.

Next, when the indoor work is finished, the stopper device 4
7 is lowered, the two-way valve 36 is closed and the two-way valve 38 is opened, and high pressure air is supplied into the lift devices 10, 10. As a result, the elevating deck 11
engages with the floor surface of the automobile body 4 and pushes it up, and the elevating deck 11 rises to the position c in FIG. 6. Here, the cylinder device 29 is operated in reverse to lower the truck outside joint device 30, and the transportation truck 7 moves to the process with the automobile body 4 placed on the lifting deck 11.

The carriage 7 that has reached the process is stopped by a fixed stopper 43.
collides with the shock absorber 44 and stops,
The carriage locks 45, 45 are activated to fix the carriage 7. Here, the lifter cylinders 46, 46 are raised to raise the workbench 49 attached to the lifter cylinder 46, and at the same time, the joint device 30 outside the truck in the process is raised, and the joint device 30 outside the truck and the joint device 21 on the truck side are connected. let Next, the two-way valve 42 is opened to supply high pressure air from the pilot fluid supply port 30b to the pilot fluid supply port 21b. The supplied high pressure air flows into the pilot port 24a of the pilot check valve 24, which is a fluid discharge control means, and opens the pilot check valve 24. Therefore, the high pressure air in the lift devices 10, 10 flows into the pilot check valve 24 from the inlet port 24b through the fluid discharge line 26, and flows into the pilot check valve 24 from the inlet port 24b.
c through the muffler 27 and is released into the atmosphere.
As a result, the elevating deck 11 is lowered, and after transferring the floor surface 50 of the automobile body 4 to the workbench 49, it is lowered to the position a in FIG. 6.

Then, the carriage 7 is connected to the carriage side joint device 2.
After the bonds 1 and 30 are released, the process returns to the process and the same operation is repeated.

In the above embodiment, air was used as the working fluid, but the same effect can be obtained by using hydraulic pressure. Moreover, an air spring, an air cylinder, etc. can be used as the lift device.

As explained above, according to the conveyance vehicle of the present invention, the conveyance can be carried out with the conveyed object placed on the elevating deck. It is possible to obtain the effect that conveyance between different processes is possible.

In particular, when transporting a car body, since the car body is originally designed to have strength when supported on the floor, the deformation of the car body is more difficult than when transporting the car body by hanging it. is extremely small, making it easier to attach interior parts, etc.

In addition, since the conveyance vehicle of the present invention places the conveyed object on the elevating deck and conveys it, it is possible to convey various kinds of conveyed objects with the same conveyance vehicle, making it extremely versatile. At the same time, it has the effect of being particularly suitable for transporting high-mix, low-volume products.

Furthermore, by placing a board on the elevating deck to make it flat, it is possible to use the elevating deck as a work platform, and because the vertical movement of the elevating deck is performed by a fluid-operated lift device. ,Workability,
This has a significant effect on improving productivity.

In addition, since the transport vehicle and the working fluid supply unit are separated, the construction of the transport vehicle is extremely simple, and at the same time, the transport vehicle itself is small and lightweight.
This has the advantage that it is easy to produce and repair, and can also be transported by hand.

[Brief explanation of the drawing]

FIG. 1 is a side view of a conventional conveyance device, FIG. 2 is a central sectional view of FIG. 5 is a sectional view taken along the line A-A in FIG. 3, FIG. 6 is a side view of the conveyance cart of the present invention, and FIG. Figure 8 is the seventh
9 is an air circuit diagram of the present invention, and FIG. 10 is a perspective view of the joint device of the present invention. 7... Transfer truck, 8... Dolly body, 10... Lift device, 11... Elevating deck, 10a... Fluid supply/discharge port, 20... Fluid supply line, 21... Dolly side joint device, 21a... ...Liquid supply port, 22...Check valve, 21b...Pilot fluid supply port, 24...Pilot check valve, 24a...Pilot port, 24b...Inflow port, 26...Fluid discharge system, 30...Dolly Outer joint device, 35... Air supply source (fluid supply source), 45... Carriage lock (fixed structure).

Claims (1)

[Scope of utility model registration request] An elevating deck and a lift device that moves the elevating deck up and down with fluid are attached to the upper surface of the main body of the trolley, which is fixed in place by a fixing device. A dolly side joint device is attached to the bogie body at the above-mentioned fixed position and can communicate with a bogie external joint device provided outside the bogie, and the fluid supply/discharge port and the bogie side joint device are connected via a check valve. The carriage external joint device is communicated with a fluid supply source, and the fluid supply/discharge port is communicated with a fluid discharge system via a fluid discharge control means.