JPS6339376B2 - - Google Patents

Description

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

Conventionally, objects to be processed have been transported using a transport device using a cart or a hanging transport device (overhead conveyor). In the case of the former transport device using a trolley, the processing work is performed on the workpiece 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. 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 problems as described above. In order to solve these problems, for example,
- As seen in Publication No. 81759, an automobile body transported through a hanger of a trolley conveyor is lowered by a drop lifter, unloaded from the hanger onto a fixed position stop conveyor, and then transported by a fixed position stop conveyor. The car body is sequentially sent to multiple work stages, and after being positioned using a positioning tool and subjected to sealing work, the car body is received by a hanger placed on another drop lifter and raised, and then transported to the desired destination by a trolley conveyor. A format is provided to do this.

However, according to this conventional method, the hanger, fixed-position stop conveyor, and positioning tool act directly on various parts of the car body, making it easy to damage the car body.In particular, avoid contact with other objects. It cannot be used in the painting processing department where it is required. Furthermore, since the car body always faces in the same direction on a work stage line, processing work cannot be easily performed from all directions.

The object of the present invention is to provide a system that can prevent paint and dust from adhering to the main transport device, which is the main line, while also being able to transfer objects between the main transport device and the processing section transport device. The object of the present invention is to provide a transport facility in a processing section that can carry out the processing without directly touching the object to be processed and can arbitrarily change the direction of the object to be processed.

In order to achieve the above object, the conveyance equipment in the processing section of the present invention includes a main conveyance device consisting of a floor conveyor and a cart driven by the floor conveyor, from the entrance of the processing chamber to the outside of the processing chamber. A plurality of engaging pins are provided protruding from the upper surface of the main body of the trolley, and the engaging pins are engaged with a pallet that can be placed on the upper surface of the main body. In addition to forming an engaging hole that can be fitted,
A support for the workpiece is provided at the upper part, and a processing unit transport device capable of transporting the workpiece through the pallet is provided in the processing chamber, and a processing unit transport device capable of moving in and out of the pallet support surface of the processing unit transport device. A lift device having a rotary table is provided, an entrance-side transfer device is provided at the entrance of the processing chamber for transferring the workpiece on the cart to the processing section transport device, and a processing section transport device is provided at the exit section of the processing chamber. An exit-side transfer device is provided to transfer the processed material onto a trolley, and these transfer devices include a movable member that can move toward and away from the inlet or outlet, and a lower part of this movable member that can be raised and lowered. and a pair of left and right support members arranged so as to be able to approach and separate from each other.

According to this configuration of the present invention, the cart from the work section of the previous process supports the object to be processed via the pallet, is driven by the driving force of the floor conveyor, and is stopped at the entrance of the processing section. . In this state, both support members of the entrance side transfer device are moved close to each other to plunge under the pallet, and then the support members are raised, and the object to be processed is lifted together with the pallet and held on the movable member side. Then, after moving the movable member to the entrance part, it is operated in the opposite manner to the above,
The object to be processed is lowered onto the processing unit conveyance device via a pallet. Next, the processing section transport device advances the workpiece by one pitch, and the lifting device lifts the workpiece through the pallet by the rising rotary table.
In this state, processing operations such as painting and polishing are performed on the object to be processed, and the direction can be changed by rotating the rotary table together with the rotary table depending on the necessity of the operation. The workpieces that have reached the outlet through these operations are received along with the pallet by the same action as the inlet side of the outlet-side transfer device, and then transferred onto the trolley that has passed around the processing chamber. .

An embodiment of the present invention will be described below based on the drawings. 1 is the main conveyance device, which includes a floor conveyor 2,
It consists of a cart 3 that is driven to run by the floor conveyor 2. The floor conveyor 2 has a drive device guide rail 5 supported at the lower part of the pedestal 4, and this drive device guide rail 5 supports and guides a roller chain type drive device 6. Further, drive protrusions 7 are provided on the upper surface side of the drive device 6 at predetermined intervals. A dolly guide rail 8 is attached to the intermediate portion of the pedestal 4. The dolly 9 includes a front carriage 11 that is supported and guided by the dolly guide rail 8 via rollers 10, and a front carriage 11 that is supported and guided by the dolly guide rail 8 via rollers 10.
2, and locked members 14 and 15 that are attached to the upper surfaces of both running stands 11 and 13 and have locking holes (not shown).
and a connecting member 16 that connects both the locked members 14 and 15, and a passive projection 17 that can be engaged with the driving projection 7 is provided at the lower part of the front carriage 11. A bogie running support plate 18 is attached to the upper surface of the pedestal 4, and a slit 19 is formed in the center of the bogie running support plate 18. The truck 3 consists of a main body 20, a plurality of wheels 21 attached to the lower part of the main body 20, and vertical driven pins 22, 23 attached to the front and rear parts of the main body 20. 23 through the slit 19 and engaged with the locking holes of the locking members 14 and 15, the truck 3 travels on the truck running support plate 18 integrally with the dolly 9. A plurality of engagement pins 24 are protruded from the upper surface of the main body 20. 25 is a processing chamber formed by a surrounding wall body 26. The main transport device 1 includes:
The conveyance line 27 heads toward the inlet 28 of the coating chamber 25, and after passing around the outer side of the processing chamber 25 from the position of the inlet 28, reaches the outlet 29 of the processing chamber 25, and reaches the outlet 29 of the processing chamber 25. 29. Therefore, the trolley 3 travels without passing through the processing chamber 25. Reference numeral 30 denotes a pallet that can be placed on the upper surface of the main body 20, and has an engagement hole 31 in which the engagement pin 24 can be engaged, and a vertical shaft 33 is disposed in the center thereof. This vertical axis 33
A support 34 is attached to the upper end of the support 34, and the object 35 to be processed is supported by this support 34.

A processing unit transport device 36 capable of transporting the workpiece 35 into the processing chamber 25 via the pallet 30
will be placed. That is, a pair of left and right conveyor bars 40 and 41 are provided which are guided by support rollers 38 and 39 attached to the machine frame 37, and these conveyor bars 4
0 and 41 are integrated by a plurality of connecting plates 42. The conveyance bars 40 and 41 can be pushed and pulled in the length direction, and the push and pull movement is achieved by connecting a rack 43 on an extension of one of the conveyance bars 40,
This is accomplished by rotating a pinion 44 that engages this rack 43 in forward and reverse directions using a forward and reverse drive device 45. The pallets 30 can be installed on the upper surfaces of the conveying bars 40, 41, so that the pallets 30 can be conveyed at a constant pitch. A lift device 46 is provided so as to face the pallets 30 conveyed at a constant pitch from below. That is, the lift device 46 includes a rotating horizontal shaft 47 supported by the machine frame 37, a pair of left and right levers 48 attached to the rotating horizontal shaft 47, a lifting platform 49 attached to the free ends of these levers 48, and a lifting platform 49 attached to the free ends of these levers 48. A rotary table 51 is arranged on the upper surface side of the lifting table 49 via a ball support 50.
and an engagement protrusion 52 that is erected from the upper surface of the rotary table 51 and that can be engaged with and detached from the engagement hole 31;
an actuating lever 53 attached to the horizontal rotating shaft 47;
A connecting rod 54 connecting the operating levers 53 between the plurality of lift devices 46, and this connecting rod 54.
The elevating table 49 is guided up and down by a guide device (not shown), and the rotary table 51 is connected to both conveying bars 4.
It becomes possible to move in and out of the upper surface (pallet support surface) of 0,41. A cover 56 protects the lift device 46 from paint, dust, and the like. A workpiece 35 on the trolley 3 is placed at the entrance 28 of the processing chamber 25.
An entrance-side transfer device 57 is provided for transferring the materials to the processing section transport device 36 via the pallet 30. That is, the entrance side transfer device 57 includes a ceiling frame 58, a fixing rack 59 attached to the lower surface of the ceiling frame 58, and a guide rail 60 disposed below the ceiling frame 58.
A movable rack 62 supported and guided by this guide rail 60 via rollers 61, and both racks 59, 62.
A pinion 63 that engages simultaneously with the rack, a cylinder device 64 that reciprocates the pinion 63 in the rack length direction, a portal frame body (an example of a movable member) 65 that is integrated with the movable rack 62, and this open frame body. It consists of a pair of left and right slide plates 66 (an example of a support member, such as a fork type) which are disposed below the slide plate 65 and can move toward and away from each other, and a cylinder device 67 that raises and lowers these slide plates 66. In addition, the processing chamber 25
An exit side transfer device 68 is provided at the exit section 29 of the processing section 29 for transferring the workpiece 35 transported by the processing section transport device 36 onto the trolley 3 via the pallet 30. This exit side transfer device 68 is the entrance side transfer device 57.
It has the same structure as the ceiling frame 69, fixed rack 70, guide rail 71, roller 72, movable rack 73, pinion 74, cylinder device 75, portal frame 76, slide plate 77, and cylinder device 78. Ru.

The transport work in the processing section will be explained below. The cart 3 from the working section of the previous process supports the workpiece 35 via the pallet 30, and also supports the workpiece 35 via the pallet 30.
2 and 23 are engaged with the locked members 14 and 15, the dolly 9 is driven along the conveyance line 27 together with the dolly 9 under the driving force of the drive device 6. The cart 3 is then stopped at the entrance portion 28 of the processing chamber 25. In this state, the entrance side transfer device 57
operates and transfers the object to be processed 35 to the processing section transport device 36. That is, first, both slide plates 66 move toward each other and enter the lower part of the pallet 30. Next, the slide plate 66 is raised by the operation of the cylinder device 67, and the workpiece 35 is lifted together with the pallet 30 and held on the side of the portal frame 65. Then, the cylinder device 64 is actuated to advance the pinion 63, and the movement and rotation of the pinion 63 advances the movable rack 62 by double the length. As a result, the object to be processed 35 is advanced through the portal frame 65 and positioned at the entrance portion 28 . In this state, the inlet side transfer device 57 is operated in the opposite manner to the above, and the pallet 30 is
The object to be processed 35 is lowered onto both transport bars 40 and 41 of the processing unit transport device 36 via the transporter 35 . Next, the forward/reverse drive device 45 is operated to advance both conveying bars 40, 41 by one pitch via the pinion 44 and rack 43, so that the pallet 30 is opposed to the first lift device 46. Then, the drive device 55 is operated, and the connecting rod 54 and link mechanisms 53, 47, 4
8, the lifting platform 49 is raised. As a result, the engaging protrusion 52 of the rotary table 51 engages with the engaging hole 31, and the rotary table 51 further contacts and lifts the pallet 30. In this state, processing operations such as painting and polishing on the object 35 are performed manually or automatically. During the processing operation, the workpiece 35 is rotated about the vertical axis 79 manually or automatically. This rotation is made possible by rotating the rotary table 51 with respect to the lifting table 49 via the ball support 50. Note that during the processing work, the conveyance bars 40 and 41 are moved back. After completing the intended processing work, the lifting platform 49 is lowered and the pallet 3
0 is placed on the transport bars 40, 41 again.
The pallet 30 is conveyed one pitch by the operation of the conveyor bars 40, 41. In this way, while being conveyed one pitch at a time, processing work is performed at each stop section. During such work, the empty cart 3 at the entrance section 28
travels along a detour route formed outside the surrounding wall body 26 and is stopped at an exit portion 29. The pallet 30 supporting the workpiece 35 that has reached the end of the processing unit transport device 36 is transferred as described above by the exit side transfer device 68 which operates in the opposite direction to the inlet side transfer device 57. It is delivered to an empty trolley 3 waiting at the exit section 29. The cart 3 is then transported to the next process.

As described above, by employing a combination structure of the transport bars 40, 41 that can be pushed and pulled, the lift device 46, etc. as the processing unit transport device 36,
In the processing chamber 25, it is possible to carry out transportation that can respond to a high takt time, such as by a robot, and it is also possible to carry out transportation with higher precision than in a chain transportation type.

According to the present invention, the following effects can be expected.
That is, since the main transport device consisting of a trolley or a floor conveyor 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 the loss of drying energy due to the natural increase in weight on the main conveyance device side, and also to prevent various problems caused by adhesion of paint and dust, such as meshing with the conveyor, and to prevent aging and rigidity. This is advantageous in terms of manufacturing accuracy, and moreover, stable transportation using a trolley can be performed outside the processing chamber. As described above, according to the present invention, the work for removing paint and dust can be greatly reduced, and maintenance inspection and running costs can be reduced. In particular, according to the present invention, since the conveyance by both conveyance devices and the transfer by both transfer devices are performed via pallets, there is no direct contact with the objects to be processed, and no damage occurs.
It can be advantageously employed mainly in the painting processing section. Furthermore, the object to be processed can be oriented in any direction, and processing operations can be easily performed from all directions.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view, FIG. 2 is a side view, and FIG. 3 is a plan view.
Fig. 4 is a partially cutaway side view of the main conveyance device, Fig. 5 is a partially cutaway front view of the same, Fig. 6 is a plan view of the same, Fig. 7 is a longitudinal sectional front view of the coating unit transfer device, and Fig. 8 is the same plan view. 1... Main conveyance device, 2... Floor conveyor, 3
...Dolly, 20...Main body, 24...Engagement pin, 2
5... Processing chamber, 28... Inlet section, 29... Outlet section, 30... Pallet, 31... Engagement hole, 34...
... Supporting tool, 35 ... Processing object, 36 ... Processing section transport device, 46 ... Lift device, 51 ... Rotating table,
57... Entrance side transfer device, 65, 76... Portal frame (movable member), 66, 77... Slide plate (supporting member), 68... Exit side transfer device.

Claims (1)

[Claims] 1. A main conveyance device consisting of a floor conveyor and a trolley driven by the floor conveyor is arranged so that it runs from the entrance of the processing chamber along the outside of the processing chamber and then reaches the exit. A plurality of engaging pins are provided protrudingly on the upper surface of the main body of the trolley, and an engaging hole into which the engaging pins can be engaged is formed in a pallet that can be placed on the upper surface of the main body, and a to-be-processed plate is formed on the upper surface of the pallet. A support for the object is provided, and the processing chamber includes a processing section transport device capable of transporting the object to be processed via the pallet, and a rotary table that can move in and out of the pallet support surface of the processing section transport device. At the entrance of the processing chamber, there is provided an entrance-side transfer device for transferring the workpieces on the trolley to the processing section transport device, and at the exit section, the objects are transported by the processing section transport device. An exit-side transfer device for transferring the workpiece onto a trolley is provided, and these transfer devices are connected to a movable member that can approach and move away from the inlet or outlet, and a movable member that can be raised and lowered at the bottom of this movable member and that can approach each other. 1. A conveyance facility in a processing section, comprising a pair of left and right support members arranged so as to be separated from each other.