JPH0464967B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for preventing swinging of the hanger of a lifting device for transfer, which is employed, for example, in an automobile assembly line, when moving a suspended door to the floor. and its equipment.

BACKGROUND OF THE INVENTION On an automobile assembly line, doors are attached to or removed from the body depending on the process of performing various operations. In the past, for example, Utility Application No. 60-168939 was used to perform such work.
number is provided. In this conventional example, a hanger that can freely support the door is attached to a trolley device so as to be able to swing left and right, and after the trolley device is moved to the divided rail part of the lifting device, the lifting frame is lowered and installed on the floor side. The door is being moved to the detachment device. In order to prevent the hanger from swinging from side to side during lifting and lowering, a guide roller provided on the back surface of the hanger is fitted into a guide rail provided on the side of the lifting frame.

Problems to be Solved by the Invention According to the conventional type described above, since the guide rail is fitted with the guide roller with some vertical clearance, the hanger swings in proportion to the vertical clearance when descending. As a result, it was difficult to transfer the device to a predetermined position on the attachment/detachment device after it had been lowered, and the operator had to correct the position.

The object of the present invention is to prevent the hanger from swinging in a lifting device for transfer, which allows hanger guide rollers to be fitted securely with some clearance, while at the same time locking the hanger guide rollers with no clearance at all when descending. The object of the present invention is to provide a method and an apparatus therefor.

Means for Solving the Problems In order to solve the above-mentioned problems, the method of the present invention is to transfer parts between the upper and lower parts by supporting a trolley device with swingable hangers and moving up and down. In the elevating device, the elevating frame is provided with a guide rail device into which a hanger guide roller provided on the back surface of the hanger can be fitted, and the guide rail device widens the guide width when the elevating frame stops at the top dead center; From the time of descent to the bottom dead center, the guide width is narrowed to sandwich the hanger guide roller. The device of the present invention is a lifting and lowering device for transferring parts that moves up and down while supporting a trolley device in which a hanger is swingably provided.
A guide rail device into which a hanger guide roller provided on the back surface of the hanger can be fitted is provided, and the guide rail device is connected to a fixed rail portion, a movable rail portion that can move toward and away from the fixed rail portion, and a movable rail portion that can freely approach and move away from the fixed rail portion. It is composed of an elastic body that biases the rail portion in one direction of approach and separation, and is provided with a stopper cylinder that moves the movable rail portion in the other direction against the elastic body.

Operation According to the above configuration of the present invention, when the trolley device is placed in the lifting frame of the lifting device, the lifting frame is at the top dead center, and the movable rail portion of the guide rail device moves away from the fixed rail portion. Since the guide width is widened, the hanger guide roller will fit with some clearance. Between the time the elevator frame is lowered and the bottom dead center, the stopper cylinder operates to move the movable rail closer to the fixed rail to narrow the guide width and move the hanger guide roller up and down with both rails. It can be clamped from any direction.

Embodiment An embodiment of the present invention will be described below based on the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a suspended conveyance device, which includes a trolley guide rail 2, a trolley drive rail 3 installed above the trolley guide rail 2, and a fixed path 11 guided by the trolley guide rail 2. It is composed of a trolley device 4 that can run freely on the trolley device 4, a hanger 5 attached to the trolley device 4, and a trolley drive device (such as a chain conveyor) 6 guided by the trolley drive device rail 3. The trolley device 4
is between the connecting rod 10 that connects the front trolley 7, the free trolley 8, the rear trolley 9, the front trolley 7 and the free trolley 8, and the trunnion pins connected from the free trolley 8 and the rear trolley 9. The hanger 5 also serves as a connecting frame
It consists of a part of etc. The front trolley 7 is connected to the drive protrusion 1 from the trolley drive device 6.
It has a passive dog 13 that can be engaged with and detached from the drive dog 2 and is movable up and down, and an operating lever 15 that is attached in the middle thereof via a horizontal shaft 14 so as to be able to swing up and down extends forward. The hanger 5 includes a front-rear rod 16, a vertical rod 17 connected downwardly from two places in front and rear of the front-rear rod 16, and a connecting rod 18 disposed between the intermediate portions of these vertical rods 17. Lower edge receiver 19 attached to the free end of both vertical rods 17
It is formed into a flat shape by a clamping device 20 attached to the front vertical rod 17 and a pair of outer butts 30 provided to the connecting rod 18. As shown in FIGS. 1 and 4, the longitudinal rod 16
The front and rear ends are rotatably attached to a connecting plate 22 via a longitudinal axis 21, and the connecting plate 22 is rotatably connected to the trunnion pin 23 via a longitudinal axis 24. As a result, the hanger 5 also serves as a connecting frame for both the trolleys 8 and 9, and is capable of swinging left and right around the axes of both the longitudinal axes 21 and 24. A hanger guide roller 25 is freely rotatably attached to the back side of the longitudinal rod 16, and a swinging guide roller 26 is attached to the lower end of the vertical rod 17.
The hanger 5 is slightly deformed depending on whether it is used for the front door 27 or for the rear door 28, which is an example of a part, but the basic structure is the same. As shown in FIGS. 1 and 6, the clamp device 20 acts on a hinge 39 for connecting the bodies provided at the side ends of the doors 27 and 28, and is attached to the middle part of the front vertical rod 17. a bracket 31, a first link 32 and a second link 33 swingably attached to the bracket 31 via a vertical pin, and these links 32, 3.
A lever 34 is connected to the lever 34 through a vertical pin so as to be able to swing relative to each other, and a claw 3 is attached to the free end of the second link 33 and can be freely engaged with and detached from the hinge 39 from the side.
5, a receiving member 36 made of a sponge material or the like to receive the outer surfaces of the doors 27, 28, and a magnet 37 attached to the second link 33.The toggle link mechanism is formed by both links 32, 33 and lever 34. Configure. As shown in FIG. 2, the constant path 11 of the suspended conveyance device 1 is arranged in pairs on the left and right well above the floor surface 80, and is divided into one for the right door group and one for the left door group.

As shown in FIGS. 1 and 2, the trolley guide rail 2 becomes a divided rail portion 2A at a predetermined location on the fixed path 11, and this divided rail portion 2A
is supported on the lifting device 40 side. That is, the elevating device 40 includes a pair of supports 41 erected from the floor surface 80.
, an elevating frame 44 that is guided via a plurality of rollers 43 to a vertical guide rail 42 attached to the side surface of these columns 41, a pedestal 45 installed between the upper ends of the pedestal 41, and a frame 45 mounted on this pedestal 45. placed,
It also includes a winch-type lifting drive unit 46 that is interlocked with the lifting frame 44, and a dividing rail portion 2A is attached via a bracket 47 between both lifting frames 44. The trolley driving device rail 3 and the like cannot be disposed on the lifting frame 44 side. Therefore, a trolley delivery device 48 is disposed above the dividing rail portion 2A. This trolley sending device 48 includes a guide rail 49 attached to a bracket 47 above the dividing rail portion 2A, a movable base 51 supported and guided by this guide rail 49 via wheels 50, and a reciprocating system that moves this movable base 51. a cylinder device 52 for moving;
The passive dog 1 is attached to the movable base 51 and
Anti-back type pusher 5 that can be freely connected to and removed from 3.
It consists of 3. A guide rail device 56 is attached to the bracket 47 to which the hanger guide roller 25 is fitted to prevent the hanger 5 from swinging. As shown in FIGS. 4 and 5, this guide rail device 56 has a bracket 58 attached to the lifting frame 44 via a mounting plate 57, and a fixed rail portion 59 attached to the front side of this bracket 58. Two rods 62 are provided on the back side of the bracket 58 via a cylindrical guide 60 and a bush 61, respectively, so as to be movable up and down. A support plate 65 is attached between the lower ends of both rods 62 via a cylinder 63, a nut 64, etc. A movable rail portion 66 is provided on this support plate 65, and this movable rail portion 66 is connected to the fixed rail portion 59. The guide width in the vertical direction is 67.
can be changed freely. Further, a spring 70, which is an example of an elastic body, is provided between the lower surface of the holder 69 disposed on the upper part of the rod 62 via a nut 68 and the upper surface of the cylindrical guide 60, so that the movable rail portion 66 approaches. It is biased to move. A cushion 71 is attached to the upper end of the rod 62, and a stopper cylinder 72 is provided on the pedestal 45 above the cushion 71. This stopper cylinder 72 faces downward, and a stopper 74 is attached to the lower end of the piston rod 73 so as to be able to come into contact with the cushion 71. As shown in FIGS. 1 to 3, the lifting frame 44 has a clamping device 2.
0 release device 81 is provided. This release device 8
1 is a holding frame 83 attached to the elevating frame 44 via a bracket 82, a push plate 85 provided on the holding frame 83 so as to be movable laterally via a guide rod 84, etc.; Holding frame 8
3 and a cylinder device 86 attached to the cylinder.

As shown in FIG. 2, a conveyance device 90 is disposed on the floor 80 passing through the center between both lifting devices 40. As shown in FIG. This conveyance device 90 is a floor conveyor type, and supports and conveys a body (an example of a main body to be assembled) 91 on a fixed path. Doors 27,
An attachment/detachment device 92 is provided for attaching and detaching 28. This attachment/detachment device 92 includes a trolley 93 which can freely travel back and forth along the fixed route and can travel in synchronization with the transport device 90 when traveling, and a movable trolley 93 that is installed on the trolley 93 and can move toward and away from the fixed route. stand 94,
It is composed of a lower end support 95 provided on the movable table 94 side, an outer surface support (vacuum device) 96, and the like.

The operation of the above embodiment will be explained below.

Normally, the trolley device 4 travels by engaging the drive protrusion 12 with the passive dog 13.
At this time, the front end side of the operating lever 15 is moving downward. The lower edges of the front door 27 and the rear door 28 are received by the lower edge receiver 19, the front edges are clamped by the clamp device 20, and the outer surfaces are supported by the outer butt 30, so that there is no play during transportation. It is done without any sticking or falling off. At this time, in the clamping device 20, the lever 34 and the second link 33 are positioned in a straight line in the front-rear direction, as shown by the solid line in FIG.
9 is engaged. In addition, the magnet 37 is attracted to the bracket 31 of the vertical rod 17, and the magnet 37 is attached to the door 27, 28.
Prevents wobbling etc. The trolley device 4 holding the front door 27 and the rear door 28 via the hanger 5 is transferred to the separate rail section 2A of the lifting device 40 as shown in FIGS. It is stopped and positioned at a predetermined position. At that time, hanger guide roller 2
5 is fitted and guided by the guide rail device 56, thereby preventing the hanger 5 from swinging around the longitudinal axis. That is, when the trolley device 4 is transferred, the lifting frame 44 is at the top dead center, and at this time, as shown in FIG. Since the rod 62 is lowered against this movement, the movable rail section 66 is moved downwardly away from the fixed rail section 59 to widen its guide width 67. Therefore, the hanger guide roller 25
The fit is secure and comfortable. With the two trolley devices 4 stopped at predetermined positions, first, the stopper cylinder 72 is contracted, and the stopper 7
Raise 4. Then, the movable rail portion 66 rises via the rod 62 and the support plate 65 due to the elastic force of the spring 70, moves closer to the fixed rail portion 59, narrows the guide width 67, and both rail portions 59, 66 By this, the hanger guide roller 25 is clamped from above and below, and the hanger 5 is integrated with the lifting frame 44 side. Next, the lifting device 40 is operated to lower the lifting frame 44. As a result, both hangers 5 are lowered via the divided rail portion 2A, but at this time, in the attachment/detachment device 92, the cart 93 is stopped at a predetermined position below the elevation path. Both movable bases 94 of the truck 93 are in a mixed position separated from the fixed path. The release device 81 is activated before the lifting frame 44 approaches the bottom dead center. That is, when the cylinder device 86 is extended and the advancing push plate 85 is brought into contact with the lever 34, and this lever 34 is swung outward as shown by the imaginary line in FIG. will also swing outward and come off the hinge 39. After this, trolley 9
3, as the hanger 5 is lowered as described above, the lower edges of the doors 27 and 28, which were received by the lower edge receiver 19, are moved to the lower edge support 95 as shown in the imaginary line in FIG. received and doors 27, 28
The outer surface of is supported by an outer surface support 96. Next, both doors 27 and 28 are tilted along a fixed path, and the cart 93 is kept on standby while maintaining the tilt angle. Then, when the body 91, which has been conveyed on a fixed path by the conveyance device 90, reaches a predetermined position, the traveling drive device is activated, and the body 91 is conveyed by the conveyance device 90.
1, the trolley 93, that is, both doors 27 and 28 are moved synchronously. During this synchronous movement, the movable base 94 is moved toward a fixed path, and the doors 27 and 28 are moved so that their inner edges respond to the mounting openings of the body 91. Then, by manual operation of the worker,
The hinges 39 (engaging portions) of the doors 27 and 28 are engaged with the engaged portions on the body 91 side, and the holding is released. Next, the movable base 94 is moved in and out,
After each part is swung back to its original position, the carriage 93 is moved back in the opposite direction to return to its original state. Note that the empty hanger 5 is lifted up when it is no longer involved due to the synchronized movement of the cart 93, and then sent to the next process. At this time, when the elevating frame 44 reaches the top dead center, the guide width 67 is widened as shown in FIG. 4, so that the movement to the next process is performed smoothly.

In the above description, the function of attaching the doors 27 and 28 to the body 91 has been described, but this also makes it possible to remove the doors 27 and 28 by a reverse operation.

Effects of the Invention According to the above configuration of the present invention, when the trolley device is placed in the lifting frame of the lifting device, the lifting frame is at the top dead center, and the movable rail portion of the guide rail device moves away from the fixed rail portion. Since the guide width is widened, the hanger guide roller can be fitted smoothly and reliably with some clearance.
Between the time the lifting frame is lowered and the bottom dead center, the stopper cylinder operates to move the movable rail closer to the fixed rail to narrow the guide width and move the hanger guide roller up and down with both rails. This allows the hanger to be integrated with the elevator frame, allowing for a vibration-free descent. As a result, the transfer to the attachment/detachment device etc. can always be performed at a predetermined position after being lowered, and the operator does not have to correct the position.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of the lifting device, Fig. 2 is a front view of the same, Fig. 3 is a front view of the main parts, and Fig. 4 is a guide rail device. 5 is a side view of the same, and FIG. 6 is a plan view of the clamp portion. DESCRIPTION OF SYMBOLS 1... Hanging conveyance device, 2A... Dividing rail part, 4... Trolley device, 5... Hanger, 19...
Lower edge receiver, 20...clamp device, 25...hanger guide roller, 27...front door, 28...rear door, 30...outer pad, 40...lifting device, 44...lifting frame, 48... Trolley sending device, 56... Guide rail device, 59... Fixed rail section, 62... Rod, 65... Support plate, 66
...Movable rail section, 67...Guide width, 70...
Spring (elastic body), 71...Cushion, 72...
Stopper cylinder, 74... Stopper, 81...
release device, 90...conveyance device, 91...body,
92...Attachment and detachment device.

Claims (1)

[Scope of Claims] 1. In a lifting and lowering device for transferring parts between upper and lower sides by lifting and lowering a hanger while supporting a swingable trolley device, a lift frame is provided with a rear surface of the hanger. A guide rail device is provided in which a hanger guide roller provided at
A method for preventing hanger shaking in a lifting device for transferring, characterized in that the guide width is narrowed from the time of descent to the bottom dead center to sandwich the hanger guide roller. 2. In a lifting and lowering device for transferring parts between the upper and lower sides by lifting and lowering a trolley device in which a hanger is swingably provided, a hanger guide roller provided on the back side of the hanger is attached to the lifting frame. A guide rail device that can be freely fitted is provided, and this guide rail device includes a fixed rail portion, a movable rail portion that can move toward and away from the fixed rail portion, and a movable rail portion that moves toward and away from the fixed rail portion in one direction. 1. A hanger swing prevention device for a lifting device for transfer, comprising an elastic body that biases the body, and a stopper cylinder that moves a movable rail portion in the other direction against the elastic body.