JP3404658B2 - Method of preventing vehicle movement on conveyor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing inadvertent movement of an automobile on a conveyor used in a completion inspection line in an automobile factory, for example.

[0002]

In the above completion inspection line, when the conveyor is driven to convey an automobile after completion inspection, if the parking brake of the automobile is forgotten to operate on the conveyor, the automobile will not operate properly. It may move easily and is dangerous.

An object of the present invention is to provide a method for preventing inadvertent movement of an automobile on a conveyor.

[0004]

A method of preventing movement of an automobile on a conveyor according to the present invention restrains movement of the automobile on the conveyor in the conveyor conveying direction with respect to the ground side, operates the conveyor, and inspects the operating state of the conveyor. Then, the inspection data is obtained, and the inspection data is compared with the operation data relating to the operating state of the conveyor, which changes according to the magnitude of the load acting on the conveyor, which is obtained in advance, and the magnitude of the load acting on the conveyor is determined to determine the load. When it is determined to be small, the parking brake is operated.

[0005]

According to the method of preventing movement of an automobile on a conveyor according to the present invention, movement of the automobile in the conveyor conveying direction with respect to the ground side is restricted, the conveyor is operated, and the operating state of the conveyor is inspected to obtain inspection data. , The inspection data is compared with the operation data relating to the operating state of the conveyor that varies depending on the magnitude of the load acting on the conveyor, which was obtained in advance, and the magnitude of the load acting on the conveyor is determined, and it is determined that the load is small. Then, since the parking brake is operated, forgetting to operate the parking brake is eliminated.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.

In the following description, the front and rear means the side on which the automobile conveyed by the conveyor advances (left side in FIG. 1).
The opposite side is called back, and the left and right are the left and right sides toward the front.

Referring to FIGS. 1 and 2, the conveyor is composed of a pair of left and right conveyor units 11 that convey the automobile while straddling it. The left and right units 11 have the same left and right directions, but since they have the same configuration,
The left unit 11 will be described.

The left unit 11 includes left and right guide rails 21.
And the car C supported and guided by the guide rail 21.
A pallet 22 on which the left wheel of the pallet is placed, a pallet drive device 23 for moving the pallet 22 along the guide rails 21,
It comprises a pallet lock device 24 for positioning and fixing the pallet 22 at a predetermined position, and a stopper device 25 for restraining the forward movement of the automobile C on the pallet 22.

The left and right guide rails 21 are arranged so as to face each other in the opening and have a U-shaped cross section. The upper guide path 31 has a length slightly longer than that of the automobile C, and extends in parallel with the upper guide path 31. The lower guide path 32, the upper guide path 31, and the rear end of the lower guide path 32 are connected to each other to form a substantially semicircular inverted guide path 33.

The pallet 22 has a length slightly longer than the upper guide path 31 of the guide rail 21 and has flexibility, and a pair of left and right roller chains fitted in the left and right guide rails 21. It is composed of 41 and a plurality of slats 42 which are continuously stopped in these chains.

The pallet driving device 23 is a front driving unit arranged near the front end of the upper guide path 31 of the guide rail 21.
51, a rear drive unit 52 arranged near the rear end and a central drive unit 53 arranged near the center rear end of the lower guide path 32. Front drive unit 51 and rear drive unit 52
Are the same in structure, and the front drive unit 51 and the central drive unit 53 have the same structure, although the vertical directions are opposite.

Referring to FIGS. 4 and 5, the front drive unit 51 includes a friction drive wheel 61 pressed against the lower surface of the slat 42 and a three-phase AC induction motor in which the drive wheel 61 is fixed to the output shaft 62. 63 and a vertical pressing plate 64 to which the motor 63 is attached and which is vertically swingable.

A rubber elastic ring 65 is provided on the outer peripheral surface of the drive wheel 61.
It has been fitted over. A horizontal support pin 66 attached to the conveyor frame side is passed through the rear end of the pressing plate 64. A horizontal plate-shaped bracket 67 is provided at the front end of the pressing plate 64.
Is provided, through which the vertical spring pressure adjusting bolt 68 is passed. A horizontal suspension pin 69 attached to the conveyor frame side is passed through the head of the bolt 68. A stopper nut 71 is screwed onto the thread portion of the bolt 68. Bracket 67 and nut 71 surrounding bolt 68
A compression spring 72 is interposed between them.

The pallet lock device 24, as shown in FIGS. 3, 4 and 6, includes slats 42 on the pallet 22.
One of which is provided with a downward protruding shape, and a front lock member 82 and a rear lock member 83 that sandwich the dog 81.
It has and.

The front locking member 82 is substantially L-shaped when viewed from the side, and is attached by a horizontal pin 85 to a front bracket 84 fixed to the conveyor frame side at the tip of its horizontal portion so as to be capable of undulating. Further, it has a substantially semicircular recess 86 at the lower edge of the horizontal portion. The horizontal portion of the front locking member 82 is received by a roller 87 having a diameter corresponding to the recess 86. A piston rod of a rearward facing fluid pressure cylinder 88 is connected to the roller 87.

The rear lock member 83 has a substantially inverted S when viewed from the side.
It is in the shape of a letter, and is attached to the rear bracket 91 by a horizontal pin 92 so as to be able to rise and fall in the middle upper part of its length, and is normally urged so as to assume the posture caused by its own weight. The rear bracket 91 is supported by a front-rear direction guide rail 93 fixed to the conveyor frame side via a slide guide member 94. A piston rod of a front-facing rear fluid pressure cylinder 95 is connected to the rear bracket 91.

As shown by the solid line in FIG. 6, when the piston rod of the front fluid pressure cylinder 88 is retracted, the front locking member 82
The front portion of the recess 86 is received by the roller 87, and the front locking member 82 is in the raised posture. As shown by the imaginary line in FIG. 6, when the piston rod of the fluid pressure cylinder 88 is advanced, the roller 87 enters the recess 86 of the front lock member 82, and the front lock member 82 swings downward due to its own weight. It becomes a prone posture.

The front lock member 82 is kept in the raised state, and the rear lock member 83 is kept in the raised state with the piston rod of the rear fluid pressure cylinder 99 retracted to position the rear bracket 91 at the backward limit. Keep it. When the pallet 22 is moved forward in this state, the dock 81 comes into contact with the rear lock member 83, and the rear lock member 83 is swung downward and is in a down posture. When the dog 81 gets over the rear lock member 83,
The rear lock member 83 is in the posture in which it is raised again. When the dog 81 gets over the rear lock member 83 and comes into contact with the front lock member 82, the piston rod of the rear fluid pressure cylinder 95 is advanced and the rear bracket 91 is advanced. Then, as shown by the solid line in FIG. 6, the upper end of the rear lock member 83 is brought into contact with the dog 81 from the rear side.

Referring to FIGS. 3, 6 and 7, the stopper device 25 includes a stopper roller 101 and a stopper roller 1.
The roller shaft 102, on which 01 is freely rotatably mounted, and the stopper roller 101 are in the operating position indicated by the solid line in FIG.
The fluid cylinder for stopper operation 103 that swings the roller shaft 102 so as to horizontally swing between the non-operating positions indicated by the middle phantom line, and the roller shaft 102 with the stopper roller 101 in the operating position. And a roller lock device 104 for restraining rocking.

As shown in FIG. 6, the stopper roller 101
In the state of being located in the actuated position, extends in the left-right direction so as to cross over the slat movement path at a position just diagonally above the dog 81 locked by the locking device 24. At the base end of the roller shaft 102, there is provided a boss 106 fitted on a vertical shaft 105 provided on the conveyor frame side on the right side of the pallet moving path. Arm on boss 106
107 is integrally provided, and the piston rod of the stopper actuating fluid pressure cylinder 103 is connected to this.

The roller lock device 104 is provided with a movable lock member 111 and a fixed lock member 112 which sandwich the swing end of the roller shaft 102. The movable lock member 111 has substantially the same structure as the front lock member 82 of the pallet lock device 24, is movably attached to the bracket 113 by a horizontal pin 114, and has a substantially semicircular recess 115 on the lower edge of the horizontal portion. Received by Laura 116. Laura 11
The piston rod of the fluid pressure cylinder 117 for locking is connected to 6. The fixed lock member 112 is attached to the bracket 11
It is provided integrally with 3 so as to project upward.

Referring to FIGS. 3 and 6, a photoelectric tube type pallet movement detection sensor 121 is arranged below the slat 42 immediately below the stopper roller 101 in the operating position, and a sensor operator 122 is located below the slat 42. It is provided in a protruding shape. On the other hand, referring to FIG. 3 and FIG. 4, the photoelectric tube type stopper operation detection sensor 131 is arranged so as to sandwich the vicinity of the swing end of the roller shaft 102 of the stopper roller 101 in the operating position from above and below.

In the above description, the conveyor is installed on the floor or in a pit provided on the floor. In either case, another guide rail (not shown) is connected to the front ends of the upper guide path and the lower guide path of the guide rail of the conveyor. Through this guide rail, the empty pallet is carried into the lower guide path of the guide rail.

Next, a method of preventing the movement of the automobile on the conveyor will be described.

When the empty pallet 22 is carried into the lower guide path 32 of the guide rail 21, the pallet driving device 23 is operated. Then, the empty pallet 22 is sent from the lower guide path 32 to the upper guide path 31 via the reverse guide path 33. Dog on pallet 22 advancing in upper guide path 31
When 81 reaches the pallet lock device 24, the pallet lock device 24 is operated to sandwich the dog 81 by the front lock member 82 and the rear lock member 83. Next, the stopper actuating fluid pressure cylinder 103 is actuated to position the stopper roller 101 in the actuated position, the locking fluid pressure cylinder 117 is actuated, and the swing end of the roller shaft 102 is moved to the movable lock member 111 and the fixed lock. It is sandwiched between the members 112.

When the above preparation is completed, the automobile C is driven and placed on the pallet 22. When the front wheel of the car C contacts the stopper roller 101, the car is stopped. In this state, the parking brake is normally operated and the rear wheels of the vehicle C cannot be rotated.

With the front wheels of the automobile C on the pallet 22 in contact with the stopper roller 101, the lock by the pallet lock device 24 is released and the pallet drive device 23 is operated. In this case, when the parking brake is actuated, the rear wheel tries to move forward without rotating with the pallet 22 trying to move forward, but since the forward movement of the automobile C is restrained by the stopper roller 101, The rear wheels cannot move forward, the pallet 22 does not move , and the pallet movement detection sensor 121 remains ON, whereby it is determined that the parking brake is operating.

On the other hand, if the parking brake is not activated,
The rear wheels can rotate freely. Therefore, when the drive device 23 is operated, the pallet 22 is freely advanced. When the pallet 22 moves forward, the pallet movement detection sensor 121 detects it
It becomes FF. At this time, the stopper operation detection sensor 131 is ON. When the pallet movement detection sensor 121 is turned off while the stopper operation detection sensor 131 is turned on, it is determined that the parking brake has not been actuated.

As a result of the inspection, it is found that the parking brake has not been actuated, and the parking brake may be actuated again here.

When the inspection is completed, the stopper roller 101 is swung to the non-actuated position, and the pallet driving device is again restarted.
When 23 is actuated, the pallet 22 is moved forward with the car C on it and is unloaded from the conveyor.

In the above description, due to the force relationship between the braking force of the parking brake and the driving force of the drive device 23, the rear wheels may rotate while pulling the brake even when the parking brake is in operation. In this case, instead of checking whether or not the pallet has moved, the magnitude of the load acting on the motor 63 is detected by the relay switch type current detector 141 as shown in FIG. You can do this. When the brake is operating, a large load acts on the motor 63, and when the brake is not applied, the motor 63
A small load acts on. The detection signal of the current detector 141 is input to the controller 142, and it is determined whether or not the brake is operating. If it is determined that the operation is forgotten, the motor 63 is immediately stopped and the signal output unit 14
The alarm signal should be output from 3.

[0033]

According to the present invention, it is possible to prevent the parking brake from being forgotten, so that it is possible to reliably prevent accidental movement of the vehicle on the conveyor.

[Brief description of drawings]

1 is a side view of a conveyor used in a method according to the present invention. FIG.

FIG. 2 is a plan view of the conveyor.

FIG. 3 is an enlarged plan view of an essential part of FIG.

4 is a sectional view taken along line IV-IV in FIG.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

FIG. 8 is an electric circuit diagram for detecting an operating state of a parking brake.

[Explanation of symbols]

22 pallets 23 Pallet drive 25 Stopper device

Claims (3)

(57) [Claims] Claim: What is claimed is: 1. Constrain the movement of a car on the conveyor in the conveyor conveying direction with respect to the ground side, operate the conveyor, inspect the operating state of the conveyor, and obtain inspection data,
The inspection data is compared with the operation data relating to the operating state of the conveyor, which varies depending on the magnitude of the load acting on the conveyor, which is determined in advance, to determine the magnitude of the load acting on the conveyor, and it is determined that the load is small. And parking
A method for preventing movement of an automobile on a conveyor, characterized by determining that a rake has not been activated . 2. A pair of automobiles on the conveyor facing the ground side.
Stopper device that restrains movement in the conveyor transport direction
And the motor for driving the conveyor and the motor acting
Detector that detects the magnitude of the load to be detected and the detection signal of the detector
Based on whether the parking brake is working or not.
Based on the controller to be set and the judgment result of the controller
If not, a signal output that outputs an alarm signal
An anti-movement device for an automobile equipped with a force machine. 3. A left transporting vehicle with the vehicle straddled.
It consists of a pair of right conveyor units, each of which is on the left.
Supported and guided by the right guide rail and the guide rail.
And a pallet on one of the left wheels of the car,
Pallet drive that moves pallets along the guide rails
Moving device and a pallet for positioning and fixing the pallet in place.
Lock device and the advance of the car on the pallet
Stopper device to restrain and stopper device to prevent forward movement of automobile
Whether the pallet has moved while being restrained by
Equipped with a pallet movement detection sensor for checking
Movement prevention device.