JPH04891B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to conveyance equipment in a processing section where processing such as painting or polishing is carried out in a conveyance line while conveying a workpiece such as an automobile body.

Conventionally, objects to be processed have been transported using a cart-based transport device or a hanging transport device (overhead conveyor device). In the case of the former transport device using a trolley, the processing work is performed on the object to be processed supported by the trolley while the trolley is traveling within the processing chamber. According to this, paint, dust, etc. will adhere to the cart, resulting in various problems such as meshing with the conveyor, loss of drying energy due to natural increase in weight of the cart, and problems such as deterioration over time. Furthermore, paint and dust removal work must be performed frequently, which increases maintenance inspection and running costs. Further, the same is true for the latter hanging conveyance device, where paint and dust adhere to the secondary hanger that replaces the cart, causing the same problem as described above. In particular, according to the two conventional forms mentioned above,
Since the transport speed within the processing chamber is slow, if sufficient processing time is allowed, the time required for the object to be processed to enter the processing chamber and leave the processing chamber will be long, resulting in the processing section being overworked. This will have an adverse effect on the overall flow of the processed material.

It is an object of the present invention to prevent paint and dust from adhering to the main conveyance device by arranging a conveyance device separate from the main conveyance device in the processing chamber, and to further It is an object of the present invention to provide a transport facility in a processing section that can transport objects to be processed within a processing chamber at high speed and always safely by using a shuttle type device.

In order to achieve the above object, the conveyance equipment in the processing section of the present invention is provided with a shuttle conveyor device having tables that can be moved up and down and reciprocated at predetermined intervals in the processing chamber, and on the side of the shuttle conveyor device. Fixed pedestals are arranged at equal intervals to the predetermined pitches, and a workpiece clamping device for clamping a pallet on which workpieces are mounted is provided on the table.

According to the configuration of the present invention, the following effects can be expected. That is, by passing the pallet containing objects to be processed from the main transport device to the shuttle conveyor device at the entrance of the processing chamber, and by passing the pallet containing the objects to be processed from the shuttle conveyor device to the main transport device at the exit of the processing chamber. Since the transport device does not pass through the processing chamber, it is possible to prevent paint, dust, etc. from adhering to the main transport device.
Therefore, it is possible to prevent loss of drying energy due to a natural increase in weight on the main conveyance device side, and also to prevent various troubles caused by adhesion of paint, dust, etc., such as meshing with a conveyor. Furthermore, it is advantageous in terms of aging, rigidity, manufacturing accuracy, etc. In particular, according to the present invention, since the conveyance within the processing chamber is carried out by a shuttle conveyor device consisting of a table, a fixed pedestal, etc., the conveyance can be carried out at high speed, and even if sufficient processing time is taken, the The time required from when an object enters the processing chamber to when it leaves the processing chamber can be reduced, and the entire flow of objects including the processing section can be carried out smoothly. Furthermore, by clamping the pallet on which the workpiece is placed with the workpiece clamping device provided on the table, the pallet can be integrated into the table.
Despite the above-described high-speed conveyance and the sudden stop that accompanies it, it is possible to prevent objects to be processed from falling off or being disturbed, and stable high-speed conveyance can be performed at all times.

An embodiment of the present invention will be described below based on the drawings. In FIG. 1, 1 is a processing chamber formed by a surrounding wall 2. In FIG. Reference numeral 3 denotes a shuttle conveyor device that is disposed through the processing chamber 1, and has tables 4 that can move up and down as well as reciprocate at predetermined pitches P. In the processing chamber 1, fixed pedestals 5 are arranged so as to be distributed on both sides of the shuttle conveyor device 3, and a plurality of fixed pedestals 5 are provided at equal pitches to the predetermined pitches P. And processing room 1
Inlet side fixed pedestals 7 are provided at the outer inlet section 6 at equal pitches, and outlet side fixed pedestals 9 are similarly provided at the outlet section 8. Furthermore, a drive device 10 for the shuttle conveyor device 3 is arranged at the outlet section 8 . 11 is a main conveyance device consisting of a trolley-based conveyance device, a hanging conveyance device, etc., and its line direction is as follows:
First, go to the inlet section 6, go around the outer part of the processing chamber 1 from the position of the inlet section 6, pass through the outlet section 8 in a direction perpendicular to the conveying direction of the shuttle conveyor device 3, and then go to this outlet section. It is set to move away from 8. The main conveyance device 1 is installed in the entrance section 6.
An entrance-side transfer device 13 is disposed for transferring one workpiece 12 to the entrance-side fixed pedestal 7, and an entrance-side transfer device 13 is provided at the exit section 8 to transfer the processing object 12 from the exit-side fixed pedestal 9 to the main transfer device 11.
An exit-side transfer device 14 is provided to transfer the material to the outlet.

Next, the details of the shuttle conveyor device 3 are shown in Figure 2~
This will be explained based on FIG. Reference numeral 15 denotes a machine frame, which is constructed so as to pass through the inlet section 6 or the processing chamber 1 and reach the outlet section 8. Each fixed pedestal 5, 7, and 9 is attached to this machine frame 15 side. In the embodiment, the conveyance device 11 is a conveyance device using a trolley, and therefore the workpiece 12 does not act directly on each fixed pedestal 5, 7, 9 or table 4, but is acted upon (transported) via a pallet 16. . This pallet 16 consists of a base plate 17 and a horizontally long receiving frame 1 which is rotatably attached to the base plate 17 around a vertical axis.
8 and a pair of locking rods 19 erected from both ends of the receiving frame 18,
A cylindrical member (part of the hanger) 20 from the second side is engaged with the locking rod 19 from above. A push-pull rod 21 is disposed along the machine frame 15 on one side of the machine frame 15, and the push-pull rod 21 is supported on the machine frame 15 side via a plurality of support levers 22. That is, in the machine frame 15, a plurality of horizontal rotating shafts 23 that are perpendicular to the transporting direction are supported in the transporting direction via bearings 24, and these rotating shafts 2
The upper end of the support lever 22, to which the lower end of the support lever 3 is fixed, is connected to the push-pull rod 21 via a pin 25. An operating lever 26 is disposed at the outlet portion 8, and the operating lever 26 is attached to the machine frame 15 side via a horizontal pin 27 at its intermediate portion so as to be swingable back and forth. The upper end of the operating lever 26 is connected to the end of the push-pull rod 21 via a pin 28;
In addition, the lower end is a cylinder device 2 attached to the machine frame 15.
9 via a pin 30. Inside the push-pull rod 21, a pair of left and right lifting rods 31 are arranged along the push-pull rod 21, and these lifting rods 31 are made of square bars located below the table 4. The lower end of the elevating lever 32 is fixed to the rotating shaft 23, and the upper end of the elevating lever 32 is attached to a pin 33.
It is connected to the lifting rod 31 via. Therefore, both the lifting rods 31 can be raised and lowered by swinging the lifting lever 32 by the push/pull movement of the push/pull rod 21, and at this time, the lifting rod 31 makes a slight push/pull movement. Do this. The lifting rod 31
A running frame 34 is disposed between them, and guide rails 35 fixed to both sides of this running frame 34 are
It is supported and guided by a support roller 36, a width regulation roller 37, and an upper surface regulation roller 38 attached to the lifting rod 31 side. And this running frame 3
The table 4 is fixed to 4. Therefore, the traveling frame 34 and the table 4 are the lifting rods 3.
1, and can reciprocate in the length direction of the elevating rod 31. The outlet section 8
A motor 39 capable of forward and reverse driving is disposed on the machine frame 15 side, and a pinion 41 is attached to an output shaft 40 that is interlocked with this motor 39. A pair of right and left rack guide rails 42 is disposed below the traveling path of the traveling frame 34, and a rack 44 guided by these rack guide rails 42 via a plurality of rollers 43 engages with the pinion 41 from above. are doing. Therefore, by driving the motor 39, the rack 44 moves forward and backward. On the upper surface of the rack 44, there is a rectangular guide 45 in the center.
A guide member 46 with a rectangular guide 45 erected thereon is attached, and a block 47 into which the rectangular guide 45 is fitted is attached to the end of the traveling frame 34. A pair of guide rollers 48 for pinching and guiding the rectangular guide 45 are attached to this block 47.
Therefore, the traveling frame 34 is movable together with the rack 44 and can be raised and lowered relative to the rack 44. At both ends of the machine frame 15, there are stoppers 4 attached to both ends of the traveling frame 34.
End stoppers 51, 52 that can be contacted by 9, 50
is provided. Each table 4 is provided with a workpiece clamping device 53. That is, from the lower surface of both sides of each table 4, a pair of inner and outer brackets 54 can be seen.
are vertically arranged, and a clamp claw 56 is attached between the upper ends of these brackets 54 via a support shaft 55 so as to be able to rise and fall. A slide bar 57 is disposed between the lower portions of the bracket 54, and this slide bar 5
7 is supported by a pair of upper and lower rollers 58 attached to a bracket 54, and is configured to be slidable in the longitudinal direction along the elevating rod 31. A horizontal shaft 6 is attached to the upper surface of the slide bar 57 via a bearing 59.
0 is attached, and the free end of a link 61 whose lower end is attached to this horizontal shaft 60 is connected to the clamp pawl 56 via a pin 62. Therefore, by sliding the slide bar 57 with respect to the table 4, the clamp claw 56 is secured around the support shaft 55.
can be made to stand up or fall sideways. A penetrating portion 63 is formed in the table 4 to allow the table 4 to stand up, and a clamped portion 64 held between the table 4 and the clamp claw 56 that has been erected through the penetrating portion 63 is attached to the base of the pallet 16. It is formed on the lower surface of the plate 17. The horizontal shaft 60 projects outward through a long hole 65 formed in one bracket 54, and
It passes through an elongated hole 68 formed in a link 67 attached to the bracket 54 via a pin 66 so as to be swingable back and forth. Further, a spring 69 is provided between the upper end of the link 67 and the lower end of the bracket 54, and the operating position of the spring 69 is displaced back and forth with respect to the pin 66 by the slide of the slide bar 57. The working and non-working positions of the claw 56 are elastically maintained. An attachment 70 is attached to the lower surface of the end of the slide bar 57 on the entrance portion 6 side. A locking lever 71 that can swing back and forth is provided on the entrance portion 6 side. That is, the lower end of the locking lever 71 is supported on the machine frame 15 side via a shaft 72, and the attachment 70 can be pushed back from the entrance portion 6 side by swinging back and forth. The back and forth swinging is performed by a cylinder device 73 provided between the machine frame 15 and the machine frame 15. These 70 to 73 constitute a lock device. A movable body 76 having a pushing part 74 is disposed on the outlet part 8 side, and this movable body 75 pushes the integrated guide rod 76 into the guide cylinder 7 on the machine frame 15 side.
It is possible to move forward and backward by guiding with 7. The forward and backward movement is performed by a cylinder device 78 provided between the machine frame 15 and the machine frame 15. These 74 to 78 constitute an unlocking device. Note that in the processing chamber 1, the shuttle conveyor device 3 has a cover 7.
It is surrounded by 9.

The action will be explained below. First, the basic movement will be described with reference to FIG.
3, and is transferred from the main transport device 11 to the entrance-side fixed pedestal 7 by the entrance-side transfer device 13. The workpiece 12 on the fixed pedestal 7 on the entrance side is carried into the processing chamber 1 by the shuttle conveyor device 3, and is intermittently conveyed at predetermined pitches P at a time. The workpiece 12 that has been fed a predetermined pitch P is received by the fixed pedestal 5, and various processing operations are performed in this received state. The workpiece 12 that has been processed is transported from the processing chamber 1 by the shuttle conveyor device 3 and delivered to the exit-side fixed pedestal 9. The workpiece 12 on the exit-side fixed pedestal 9 is transferred to the main transport device 11 by the exit-side transfer device 14 and transported to the next process.

Next, the conveyance work by the shuttle conveyor device 3 will be explained. Before conveyance, as shown in FIG. 3, the traveling frame 34 is moved to the entrance portion 6 side via the rack 44, and brought into contact with the end stopper 52 of the stopped body 50 provided at the end of the traveling frame 34. ing. Therefore, although the table 4 faces the fixed pedestal 7 on the entrance side, the table 4 does not face the fixed pedestal 9 on the exit side. Further, the push-pull rod 21 is pushed toward the entrance portion 6, and as a result, the table 4 is lowered as shown by the solid line in FIGS. 7 and 8. Further, the slide bar 57 moves toward the entrance portion 6 with respect to the table 4, and the clamp claw 56 is in a horizontally laid, non-clamped position. In this state, first, the push-pull rod 21 is moved toward the outlet portion 8 side by the operation of the cylinder device 29, and the support lever 22, rotating shaft 23,
The elevator rod 31 is raised via the elevator lever 32. As a result, all the tables 4 are raised via the travel flail 34, and the pallet 16, that is, the workpiece 12, is lifted from the fixed pedestal 5 and the entrance side fixed pedestal 7, as shown by the imaginary line in FIG. At this time, the block 47 on the traveling frame 34 side rises with respect to the rectangular guide 45 on the rack 44 side, but the engagement via the guide roller 48 is maintained.
After raising the table 4, the cylinder device 73
9, the locking lever 71 is swung from the imaginary line to the solid line as shown in FIG.
Push back and slide bar 5 against table 4.
7 to the exit section 8 side. As a result, the clamp claw 56 rises and swings around the support shaft 55 via the link 67, and as shown in FIGS. Clamp from above and below. Therefore, the pallet 16, that is, the workpiece 12 is fixed to the table 4 side. Next, the motor 39 is activated to move the rack 44 toward the outlet portion 8 via the pinion 41. As a result, the traveling frame 34 is guided by the lifting rod 31 and moves toward the exit section 8,
The workpiece 12 supported by the table 4 via the pallet 16 is moved by one pitch toward the outlet section 8. This amount of movement is regulated by the stopped body 49 coming into contact with the end stopper 51. As a result, the table 4 faces the exit side fixed pedestal 9, but the table 4 faces the entrance side fixed pedestal 7. At this time, the end of the slide bar 57 on the exit portion 8 side faces the push portion 74 as shown in FIG. In this state, the cylinder device 78 is operated to move the movable body 75 toward the inlet portion 6 side. Then, the push part 74 moves to the slide bar 5.
7 and slide bar 5 against table 4.
7 to the entrance section 6 side. As a result, the clamp claw 56 swings sideways around the support shaft 55 via the link 67, and the pallet 16 is released from its fixation. Next, the push-pull rod 21 is moved toward the entrance portion 6 by reverse operation of the cylinder device 29, and the elevating rod 31 is lowered. As a result, the running frame 3
4, all the tables 4 are lowered, and the workpieces 12, that is, the pallets 16, are lowered onto the opposing fixed pedestals 5 and the exit side fixed pedestals 9.
Then, the motor 39 is operated in reverse, and the four groups of empty tables are returned to the entrance portion 6 by one pitch via the rack 47 and the traveling frame 34. This brings us to the initial state.

Both cylinder devices 73 and 78 of the workpiece clamping device 53 are returned to their original positions after performing the desired locking and unlocking operations. Further, the above-mentioned operation of the workpiece clamping device 53 is performed by the slide bar 5 disposed on the side closer to the push-pull rod 21 in FIG.
7, and for the far side slide bar 57 provided in a pair on the left and right, the clamp claw 56
Since the operation is reversed, the locking and unlocking devices are arranged in opposite positions.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a schematic plan view, FIG. 2 is a partially cutaway side view, FIG. 3 is a partially cutaway plan view, and FIG. 4 is a longitudinal sectional view of the main part. Fig. 5 is a plan view in Fig. 4, Fig. 6 is a partially cutaway side view in Fig. 4, and Fig. 7 is an A-A in Fig. 2.
8 is a sectional view taken along the line B-B, FIG. 9 is a partially cutaway side view of the locking device in the workpiece clamping device, FIG. 10 is a longitudinal sectional front view of the same, and FIG. 11 is the unlocking device. FIG. 1... Processing room, 3... Shuttle conveyor device,
4...Table, 5...Fixed pedestal, 6...Entrance section, 7...Entrance side fixed pedestal, 8...Exit section, 9...
...Exit side fixed pedestal, 10... Drive device, 11...
Main transport device, 12... Workpiece, 16... Pallet, 17... Base plate, 21... Push/pull rod, 3
1... Lifting rod, 34... Traveling frame, 41...
Pinion, 42... Rack guide rail, 53...
...Workpiece clamping device, 55...Support shaft, 56
...Clamp claw, 57...Slide bar, 61...
... Link, 64 ... Clamped part, 70 ... Attachment, 71 ... Locking lever, 73 ...
Cylinder device, 74...Pushing part, 75...Movable body, 78...Cylinder device.

Claims (1)

[Claims] 1. A shuttle conveyor device having tables that can be moved up and down and reciprocated at predetermined pitches is arranged in a processing chamber, and fixed pedestals are arranged on the side of the shuttle conveyor device at equal pitches to the predetermined pitches. . A conveyance facility in a processing section, characterized in that the table is provided with a workpiece clamping device for clamping a pallet on which workpieces are placed.