JPS6364362B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention corrects the horizontal positional deviation of a conveyed object suspended from a hanger of an overhead trolley conveyor, that is, the horizontal positional deviation of the conveyed object with respect to the hanger. An object of the present invention is to provide a positional shift detection device for a conveyed object that can automatically detect the displacement of a conveyed object without interrupting the conveyance of the conveyed object.

Hereinafter, engine assembly work equipment using a positional deviation detection device according to an embodiment of the present invention will be explained based on the attached illustrative diagrams. The main conveyor line is a conventionally known overhead trolley conveyor 4 in which a hanger 3 for suspending the automobile body 2 is supported by a plurality of trolleys. Reference numeral 5 denotes a 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 device according to the present invention for detecting displacement of the automobile body 2 in the left-right direction, and is disposed beside the trolley conveyor 4 before the movement path of the truck 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 operates based on a detection signal from a switch (such as a photoelectric switch) 10. As shown in FIGS. 3 and 4, this detection device 9 includes a movable base 1 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.
4, a cylinder/piston unit 15 for reciprocating the movable base 14, and a cylinder/piston unit 15 which is pivotally connected to the movable base 14 by a support shaft 16 so as to be able to swing up and down, and which is movable up and down by the cylinder/piston unit 17. a synchronizing lever 18, a lifting table 21 supported by the movable table 14 so as to be freely raised and lowered by a guide rod 19 and driven up and down by a cylinder/piston unit 20;
1 and a positional deviation detection lever 24 supported movably in the left and right transverse directions by a guide rod 22 and moved by a brake cylinder with a pulse encoder (hereinafter abbreviated as a cercon cylinder) 23.

The transfer device 8, as shown in FIGS. 5 and 6,
A turntable 28 is supported rotatably around a vertical support shaft 26 by a supporting caster 25 and is rotated within a range of 90 degrees by a cylinder/piston unit 27, and an upper and lower two parts 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, which are installed in stages. 3
Reference numerals 1 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 transport truck 5 includes a truck body 37 equipped with wheels 36 that ride on guide rails 35, and is supported by the truck body 37 via a guide rod 38 so as to be movable up and down. A lifting table 40 is driven up and down by a cylinder/piston unit 39, and a cellcon cylinder 42 is supported on the lifting table 40 so as to be movable in the transport direction 12 of the trolley conveyor 4 via a guide rail 41a and a guide roller 41b. a transversely movable table 43 that is supported on the movable table 43 so as to be movable in the left and right transverse directions via guide rails 44a and guide rollers 44b, and that is moved by a cellcon cylinder 45; The table 46 and this transverse movable table 46
It is comprised of a tiltable drive roller conveyor 49 whose front end is supported by a horizontal support shaft 47 and whose rear end is supported by a pair of left and right eccentric cams 48 .

The truck main body 37 is connected via a bracket 53 to a drive chain 52 suspended between a gear 50 driven by a motor and a reversing gear 51, and the rotation of the drive chain 52 is It is moved back and forth by. 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 oscillator (rotary transducer) 58 is driven through a pinion gear 57, which is a vertical rack gear whose upper end is fixed at zero and meshes 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 it (see Fig. 5). The transfer device 8 is transported onto the roller conveyor 29 of the transfer device 8 in the direction indicated by the imaginary line by the roller conveyor 7. 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 drive roller conveyor 49 of the truck 5 is driven by the motor 60, so that the pallet-mounted engine 6
is transferred from the transfer device 8 onto the drive roller conveyor 49 of the truck 5. At this time, the engine 6
As shown by the imaginary line in the figure, the pallet 6a is carried to a position where it abuts the fixed stopper 61, and in this state the movable stopper 62 protrudes and the pallet 6a is clamped between it and the fixed stopper 61.

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 18 of the positional deviation detection device 9
By vertically standing up by the cylinder/piston unit 17, the transverse frame 2a 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 12 with appropriate resistance.
By keeping the movable base 14 in a state where it can be moved (by leaving the cylinder/piston unit 15 free), the movable base 14 moves while being integrated with the automobile body 2. In this 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 at the upper limit position is moved to the upper limit position of the cell controller cylinder 23.
By moving the positional deviation detection lever 24 inwardly, the positional deviation detection lever 24 is moved from the lateral side to the longitudinal frame 2b located at the bottom near the front end of the automobile body 2, as shown by the imaginary line in FIG. It stops when it comes into contact with it. The amount of movement of the positional deviation detection lever 24 at this time is detected by the cell controller cylinder 23, and from this amount of movement, the amount of lateral positional deviation of the automobile body 2 supported on the hanger 3 is calculated by computer processing. It is calculated and output to the next stage.
When the positional deviation detection action is completed, the synchronization lever 18
Then, the positional deviation detection levers 24 are returned to their original standby positions, and the lifting platform 21 is lowered, 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 to shift 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. , cylinder/piston unit 39 again
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 base 43 forward (in the transport direction 12) by a predetermined distance from the cellcon cylinder 42 with respect to the elevating base 40, the engine 6 on the drive roller conveyor 49 is moved to the engine mounting position within the automobile body 2. It can be placed in a slightly lowered installation preparation position. 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 engine 6 is mounted at a predetermined position on the automobile body 2 by tightening the front mounting bolts of the engine 6, fitting the bolts into the rear mounting holes, and tightening the bolts.

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 mixed in, 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 30 for carrying out the empty pallet of the transfer device 8. It can be carried upstairs.

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 conveyed object position shift detection device of the present invention can be implemented and used as in the above embodiments, and has the following features:
The feature is that the movable base (the movable base 14 of the embodiment) that can reciprocate in parallel with the conveyance direction of the conveyed object (the automobile body 2 of the embodiment) that is suspended from the hanger of the trolley conveyor and is conveyed. Portion facing the transport direction of the transported object (frame 2a of the embodiment)
A synchronous lever (the synchronous lever 18 in the embodiment, which may be one that moves up and down in a straight line) that can be switched freely between an operating position that can come into contact with the object and an escape position that allows the object to pass through, and a synchronous lever that can be raised and lowered. An elevating table (elevating table 21 in the embodiment) is provided, and the elevating table includes a positional deviation detection lever (positional deviation detection lever 24 in the embodiment) movable in left and right directions with respect to the transport direction.
and a means (Cercon cylinder 23 in the embodiment) for laterally moving the detection lever so as to bring it into contact with the detected portion (frame 2b in the embodiment) facing the lateral side of the conveyed object. The point is that the displacement of the conveyed object can be detected from the lateral movement distance of the lever.

According to the device of the present invention, it is possible to automatically detect the positional deviation in the left and right directions without having to temporarily stop the conveyed object being transported by the trolley conveyor to detect the positional deviation. be.
In addition, the positional deviation detection lever comes into contact with the detected part of the transported object while moving together with the transported object, and does not slide relative to the transported object, causing scratches on the transported object. There's no fear at all. Furthermore, since the positional deviation detection lever is moved together with the object to be transported, a special driving means for moving the movable base in synchronization with the object to be transported is not required, and the present invention can be implemented at low cost.

[Brief explanation of drawings]

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 (object to be transported), 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 side view of the transfer device and the engine transport truck, FIG. 7 is a vertical front view of the truck, and FIGS. 8 and 9 are main parts of the truck. FIG. 1...Main transport line, 2...Automobile body (transferred object), 2a, 2b...Automobile body frame,
4... Trolley conveyor, 5... Engine transport trolley, 6... Engine, 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, 14, 43... Front-rear direction (conveying direction) 1
2) Movable stand, 15, 17, 20, 27, 39...
...Cylinder/piston unit, 18...Synchronization lever, 21,40...Elevating platform, 23,42,4
5... 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... Truck body, 4
6...Transverse movable table, 48...Eccentric cam for tilting the drive roller conveyor 49, 52...Chain for driving the trolley, 54, 58, 64...Pulse transmitter (rotary transducer), 61...Fixed stopper , 62...Movable stopper.

Claims (1)

[Claims] 1. A movable platform that is suspended from a hanger of a trolley conveyor and can reciprocate in parallel with the conveyance direction of the conveyed object is provided with an operating posture that can come into contact with a portion facing the conveyance direction of the conveyed object and the conveyed object. A synchronization lever that can be switched to a retracted position that allows objects to pass through, and a lifting platform that can be raised and lowered are provided, and the lifting table includes a positional deviation detection lever that can be moved laterally to the left and right with respect to the transport direction; A means for moving the detection lever laterally so as to bring it into contact with a detected portion facing the lateral side of the transported object is provided, and a position shift of the transported object can be detected from the lateral movement distance of the detection lever. A device for detecting positional deviation of transported objects.