JPS6353072B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece A that is being conveyed in a suspended state by an overhead trolley conveyor
This equipment relates to workpiece assembly work equipment for assembling workpiece B (e.g., an engine) to a workpiece (e.g., an automobile body), and is used to transport a workpiece to a workpiece assembly work trolley and to carry the workpiece into the workpiece that was supporting the workpiece. It is intended that the pallets can be carried out using a conveyor disposed perpendicular to the conveyance direction of the trolley conveyor.

Hereinafter, one embodiment of the present invention will be described based on the attached illustrative drawings. In FIGS. 1 and 2, 1 is a main conveyance line for conveying the automobile body 2; Hanging hanger 3
The overhead trolley conveyor 4 is comprised of a conventionally known overhead trolley conveyor 4 which is supported by a plurality of trolleys. Reference numeral 5 denotes an assembly work trolley for supporting and transporting the engine 6, and reciprocates along a movement path arranged directly below the trolley conveyor 4 and parallel to the main transport line 1. Reference numeral 7 denotes a roller conveyor for carrying in an engine, and a roller conveyor for carrying out empty pallets is provided at the lower stage, and is disposed at right angles to the main conveyance line 1. Reference numeral 8 denotes a transfer device that transfers the engine received from the engine carrying roller conveyor 7 onto the trolley 5 that is waiting at the origin position. Reference numeral 9 denotes a left-right displacement detection device for the automobile body 2, which is disposed on the side of the trolley conveyor 4 before the movement path of the trolley 5 and the transfer device 8.

As shown in FIG. 2, the positional deviation detection device 9 is a non-contact detection device that detects when the automobile body 2, which is being transported while being suspended by the hanger 3 of the trolley conveyor 4, has reached a predetermined position. It is composed of a switch (such as a photoelectric switch) 10 and a positional deviation detection means 11 that operates based on a detection signal from the switch 10. As shown in FIGS. 3 and 4, this detection means 11 includes a movable base 14 supported by a guide rail 13 so as to be able to reciprocate in the same direction as the transport direction 12 of the trolley conveyor 4, and a movable base 14 supported by a guide rail 13. a cylinder/piston unit 15 that reciprocates; a synchronous lever 18 that is pivotally mounted on the movable base 14 by a support shaft 16 so as to be able to swing up and down, and is caused to swing up and down by a cylinder/piston unit 17; The movable table 14 can be raised and lowered by a guide rod 19.
supported by the cylinder/piston unit 2
A lifting table 21 that is driven up and down by the robot 0, and a brake cylinder 23 supported by a guide rod 22 so as to be movable in the left and right transverse directions on the lifting table 21 and equipped with a pulse encoder (hereinafter abbreviated as a cellcon cylinder). and a positional deviation detection lever 24 that is moved by the lever.

The transfer device 8, as shown in FIGS. 5 and 6,
A turntable 28 is rotatably supported by a support caster 25 around a vertical support shaft 26 and rotated within a range of 90 degrees by a cylinder/piston unit 27, and two upper and lower stages are mounted on the turntable 28. It consists of a drive roller conveyor 29 for carrying in engines and a drive roller conveyor 30 for carrying out empty pallets, both of which are installed on the pallet. 31
and 32 are motors for driving the roller conveyors 29 and 30 separately, and 33 and 34 are pallet positioning stoppers attached to each of the roller conveyors 29 and 30.

As shown in FIGS. 6 to 9, the engine assembly work trolley 5 has wheels 3 mounted on guide rails 35.
6, a lifting platform 40 that is supported by the truck main body 37 via a guide rod 38 so as to be able to rise and fall and is driven up and down by a cylinder/piston unit 39, and a guide rail on the lifting platform 40. 41a and guide rollers 41b, a front-back movable table 43 is supported so as to be movable in the transport direction 12 of the trolley conveyor 4, and is moved by a cellcon cylinder 42, and a guide rail 44a and a guide roller are mounted on this movable table 43. A transverse movable table 46 is supported so as to be movable in the left and right transverse directions via a cylinder 44b, and is moved by a cellcon cylinder 45. It is comprised of a tiltable drive roller conveyor 49 whose end sides are supported by a pair of left and right eccentric cams 48.

The truck main body 37 is connected via a bracket 53 to a driving chain 52 suspended between a toothed wheel 50 and an idling toothed wheel 51 driven by a motor, and the rotation of the driving chain 52 is It is caused to move back and forth by the motion. 54 is a pulse transmitter (rotary transducer) interlocked with the drive gear 50 via a transmission gear 55. 56 is the lifting platform 4
A pulse transmitter (rotary transducer) 58 is driven through a pinion gear 57, which is a vertical rack gear whose upper end is fixed at 0, and engages with the pinion gear 57. 59 is a motor that drives the eccentric cam 48, and 60 is a motor that drives the drive roller conveyor 49. Further, the driving roller conveyor 49 is provided with a fixed stopper 61 and a movable stopper 62 which is driven forward and backward by a cylinder/piston unit.

To explain the engine assembly work method performed using the above equipment, first, the engine 6 supported at a predetermined position on the pallet is attached to the roller conveyor 7 in the direction in which the upper drive roller conveyor 29 connects (Fig. The roller conveyor 7 carries the transfer device 8 onto the roller conveyor 29 in the direction indicated by the line. Thereafter, the turntable 28 is turned by 90 degrees by the cylinder/piston unit 27, and the driving roller conveyor 29 is turned in a direction in which it can be connected to the driving roller conveyor 49 of the truck 5, as shown by the solid line in FIG.

On the other hand, as shown in FIG.
is raised by the cylinder/piston unit 39 to a height where the drive roller conveyor 49 connects with the drive roller conveyor 29 of the transfer device 8. In this state, the drive roller conveyor 29 of the transfer device 8 is driven by the motor 31 and the movable roller conveyor 49 of the truck 5 is driven by the motor 60 to transfer the pallet-mounted engine 6 from the transfer device 8 onto the driving roller conveyor 49 of the truck 5. At this time, the engine 6 is carried to a position where the pallet 6a abuts the fixed stopper 61 as shown by the imaginary line in FIG. be done.

On the other hand, if the detection switch 10 detects that the automobile body 2 conveyed through the main conveyance line 1 by the trolley conveyor 4 has reached a predetermined position on the left-right positional deviation detection device 9, the solid line in FIG. As shown, the synchronization lever 1 of the positional deviation detection means 11
8 is vertically erected by the cylinder/piston unit 17, the frame 2a in the transverse direction is located at the bottom near the front end of the automobile body 2.
comes into contact with the synchronous lever 18 in the upright state. At this time, the movable table 14 is moved in the conveying direction 1 with appropriate resistance.
2 (by leaving the cylinder/piston unit 15 free), the movable base 14 moves integrally with the automobile body 2. In such a state, the lifting platform 21
is raised to the upper limit height by the cylinder/piston unit 20, and then the positional deviation detection lever 24 in the upper limit position is moved to the upper limit position of the cylinder/piston unit 20.
3, the positional deviation detection lever 24 is moved laterally to the frame 2b in the longitudinal direction located at the bottom near the front end of the automobile body 2, as shown by the imaginary line in FIG. It comes into contact with the object and stops. The amount of movement of the positional deviation detection lever 24 at this time is detected by the cell controller cylinder 23,
From this amount of movement, the amount of displacement in the left-right direction of the automobile body 2 supported on the hanger 3 is calculated by computer processing and output to the next stage. When the positional deviation detection operation is completed, the synchronization lever 18 and the positional deviation detection lever 24 are returned to their original standby positions, and the automobile body 2 passes over this positional deviation detection device 9.

The vehicle body 2 is at the origin position as described above, and the engine 6 is driven by the roller conveyor 4.
9 (at this point, for example, as shown in FIG. 2, a non-contact sensor detects the side surface near the front end of the automobile body 2 and the frame 2a). The carriage body 37 is driven forward in the transport direction 12 by the drive chain 52. At this time, the driving means of the trolley drive chain 52 is proportionally or synchronously controlled so that the moving speed of the trolley body 37 is equal to the moving speed of the automobile body 2 (transport speed of the trolley conveyor 4).

When the truck body 37 begins to move in the same direction at the same speed as the automobile body 2 as described above, the eccentric cam 48 is rotated by a predetermined angle by the motor 59.
The drive roller conveyor 49 is tilted by a predetermined angle (for example, 4 degrees) around the support shaft 47 so that the rear end side is lowered, and the cylinder/piston unit 39 is operated to raise the elevator platform 40 to the first height. As a result, the engine 6 on the drive roller conveyor 49 enters the automobile body 2 up to the first height in a state of being tilted forward and upward.
Next, the traversing movable platform 4 is moved by the Cercon cylinder 45.
6 to the right (or left) by a predetermined amount, and move the engine 6 laterally together with the drive roller conveyor 49 to a position where it does not come into contact with the frame of the automobile body 2 even if the engine 6 is raised, and then After that, reinstall the cylinder/piston unit 39.
The elevator platform 40 is raised to the second height, and the engine 6 on the drive roller conveyor 49 is moved into the automobile body 2 to the second height.

Next, the traversing movable base 46 is returned to the left (or right) by the cell controller cylinder 45, but at this time, the position of the automobile body 2 in the left and right lateral directions detected by the positional deviation detection device 9 is By automatically adjusting the return amount of the traversing movable table 46 by the cellcon cylinder 45 in consideration of the amount of deviation, even if the position of the automobile body 2 is deviated in the left and right directions, the drive roller conveyor 49
The upper engine 6 can be automatically matched to the mounting position of the automobile body 2 in the left and right directions. Thereafter, by sliding the movable table 43 forward (in the conveyance direction 12) by a predetermined distance with respect to the lifting table 40 using the cell controller cylinder 42, the engine 6 on the drive roller conveyor 49 is moved to the engine mounting position in the automobile body 2. It can be placed in the mounting preparation position, which is slightly lowered. In such a state, the cylinder/piston unit 39 is operated in an inching manner by an operator's manual operation, and the elevating platform 40 is inched up together with the drive roller conveyor 49, thereby opening the front mounting hole of the engine 6 and corresponding thereto. and the mounting holes on the automobile body 2 side, and fit the bolts across both mounting holes. Then, the motor 59 rotates the eccentric cam 48 to return it to its original position, and the driving roller conveyor 49 is returned to its original position, thereby returning the engine 6 to its mounting position relative to the automobile body 2. In this state, the front mounting bolts of the engine 6 are tightened, the bolts are fitted into the rear mounting holes, and the bolts are tightened, and the engine 6 is mounted at a predetermined position on the automobile body 2.

Once the above engine installation work is completed,
By inching the cylinder/piston unit 39 to lower the drive roller conveyor 49 along with the empty pallet 6a by an appropriate amount, and then by operating the cylinder/piston unit 39 and the cercon cylinders 42, 45, the lifting platform 4 is lowered.
0 is automatically lowered to the lowering limit position, and the movable base 43 and the transverse movable base 46 are automatically returned to their original positions. At the same time, the forward drive of the truck body 37 by the drive chain 52 is stopped, and the drive chain 5
2 is reversely driven at high speed to automatically return the trolley body 37 to the original position adjacent to the transfer device 8 at high speed. Since the lifting platform 40 is at the lowering limit position, the drive roller conveyor 49 is connected to the drive roller conveyor 30 for carrying out empty pallets at the lower stage of the transfer device 8 when the trolley body 37 returns to the original position. With the movable stopper 62 retracted, both driving roller conveyors 49 and 30 are operated by the respective motors 60 and 32, and the empty pallet 6a is transferred from the carriage 5 to the driving roller conveyor for carrying out the empty pallet of the transfer device 8. 30 can be carried out.

Thereafter, the turntable 28 of the transfer device 8 is rotated back to the original position by the cylinder/piston unit 27, and the drive roller conveyor 3
0 is activated to transport the empty pallet 6a from the transfer device 8 onto the empty pallet unloading roller conveyor disposed below the engine loading roller conveyor 7, thereby completing the series of operations. .

The workpiece assembly work equipment on the conveyance line of the present invention can be implemented as in the above embodiment, and its feature is that it can reciprocate below the trolley conveyor in parallel to the conveyance direction of the conveyor. A conveyor (driving roller conveyor 49 in the embodiment) which can be raised and lowered and which also serves as a work support stand is provided on a trolley provided in the
A transfer device (transfer device 8 in the embodiment) is provided below the trolley conveyor adjacent to the starting end (origin position) of the movement path of this trolley, and this transfer device is equipped with a workpiece loading conveyor (in the embodiment). A turntable is provided which is equipped with two stages, upper and lower, of the drive roller conveyor 29 for carrying in the engine and the conveyor for carrying out empty pallets (the drive roller conveyor 31 for carrying out empty pallets in the embodiment), which also serves as a work support stand on the cart. The present invention is characterized in that the conveyor can be selectively connected to the upper and lower conveyors of the transfer device by raising and lowering the conveyor.

According to the workpiece assembly work equipment of the present invention, the workpiece carrying-in conveyor (the engine carrying-in roller conveyor 7 of the embodiment) and the empty pallet carrying-out conveyor are arranged perpendicularly to the transport direction of the trolley conveyor. The work of supplying workpieces supported on pallets onto the conveyor on the workpiece assembly work cart by arranging the workpieces in upper and lower stages so that they can be connected to the upper and lower conveyors of the transfer device. and carrying out empty pallets after assembly work.
This can be done automatically by simply using a simple structure transfer device equipped with a turntable that has two conveyors (upper and lower). Moreover, the floor area occupied is small, and the entire equipment can be configured compactly.

In the embodiment, the conveyor that also serves as a workpiece support stand (the drive roller conveyor 49 in the embodiment) is configured not only to move up and down, but also to be able to adjust its position in the front-rear direction, left-right and lateral directions, and to be able to tilt. If the assembly work could be done by simply raising the workpiece, such a position adjustment mechanism or tilt mechanism would be unnecessary.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of the whole, Fig. 2 is a side view of the same, Fig. 3 is a front view of the left and right lateral positional deviation detection means of the automobile body (transported object), Fig. 4 is a side view of the same, and Fig. 4 is a side view of the same. Fig. 5 is a plan view of the transfer device, Fig. 6 is a vertical cross-sectional side view of the transfer device and the engine (work) assembly work cart, Fig. 7 is a longitudinal cross-sectional front view of the cart, and Figs. 8 and 9 are the FIG. 3 is a longitudinal sectional front view of the main part of the truck. 1...Main transport line, 2...Automobile body (transferred object), 2a, 2b...Automobile body frame,
4... Trolley conveyor, 5... Engine (work) assembly work trolley, 6... Engine (work),
6a...Pallet, 7...Roller conveyor for carrying in the engine, 8...Transfer device, 9...Device for detecting left and right lateral positional deviation of the automobile body, 10, 63a,
64b...Non-contact detection switch, 11...Right and left lateral positional deviation detection means, 14, 43...Movable base in the front-rear direction (conveying direction 12), 15, 17, 20,
27, 39...Cylinder/piston unit,
18...Synchronization lever, 21,40...Lifting platform, 2
3, 42, 45... Cercon cylinder (brake cylinder with pulse encoder), 24...
... Positional deviation detection lever, 28 ... Turntable, 29 ... Drive roller conveyor for carrying in the engine, 30 ... Drive roller conveyor for carrying out empty pallets, 31, 32, 59, 60 ... Motor, 37
... Cart main body, 46 ... Traverse movable table, 48 ... Eccentric cam that tilts the drive roller conveyor 49,
52...Bolly driving chain, 54, 58, 64...
...Pulse transmitter (rotary transducer), 6
1... fixed stopper, 62... movable stopper.

Claims (1)

[Claims] 1. A conveyor that also serves as a work support stand that can be raised and lowered is provided on a trolley that is provided below the trolley conveyor so as to be able to reciprocate in parallel with the conveyance direction of the conveyor, and the trolley conveyor is installed adjacent to the starting end of the travel path of the trolley. A transfer device is provided on the lower side, and this transfer device is equipped with a turntable that is equipped with a conveyor for carrying in works and a conveyor for carrying out empty pallets in upper and lower stages, and a conveyor that also serves as a work support stand on the above-mentioned trolley. Workpiece assembly work equipment in a conveyance line that allows the conveyor to be selectively connected to the upper and lower conveyors of the transfer device by lifting and lowering.