JPS62140923A - Automatic workpiece exchanger - Google Patents

Abstract

PURPOSE:To aim at enhancing the efficiency of production, by providing such an arrangement that a workpiece may be attached to and removed from an arm on movement without a hanger conveyer being stopped. CONSTITUTION:A workpiece 26 set on an arm 7 of a hanger 5 is held by upper and lower workpiece holding means 46, 47. These workpiece holding means 46, 47 are attached to a frame 29 which is slidable in the same direction as the direction of the arm 7, by means of an elevating means 34, and therefore, the workpiece 26 held by the workpiece holding means 46, 47 is moved in the direction in which the arm 7 is extended. Accordingly, loading and unloading may be made with no interference with the arm 7. Further, since the workpiece holding means 46, 47 are moved at the same speed as the feed speed of the workpiece 26, by means of a carrier vehicle 11, it is possible to attach and remove the workpiece 26 without the hanger conveyer being stopped, and therefore, it is possible to remarkably enhance the efficiency of production.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is an automatic workpiece loading/unloading system capable of automatically loading or unloading a workpiece or both loading and unloading a workpiece onto a moving diagonally extending arm. It relates to devices (including loading devices, unloading devices, and devices that perform both loading and unloading).

[Conventional technology]

A paint booth for electrostatic painting will be installed at the final stage of the disc wheel manufacturing line. A hanger conveyor for transporting works (disk wheels) is provided through the coating booth, and devices for attaching and removing works to the hangers of the hanger conveyor are provided at the front and rear of the coating booth. The hanger of the hanger conveyor is equipped with a rod-shaped arm for loading and unloading the workpieces. Conventionally, the arm is placed horizontally at right angles to the direction of travel of the hanger conveyor so that the workpieces can be easily attached and removed. It is provided.

[Problem that the invention seeks to solve]

However, if the arm is placed right next to the arm, the paint that adheres to the arm during painting may cause poor insulation of the arm, which may result in defective painting of the workpiece. In order to prevent poor insulation of the arm, it is conceivable to mount the arm diagonally upward so that the adhered paint will naturally flow down along the arm. Since the arm is set so as to penetrate through the arm, it is impossible to take out the work directly from the side because the arm and work interfere.

In addition, with conventional hanger-con hair, unless the workpiece is set on the hanger in a balanced manner, the lower part of the hanger is a free end, which causes the hanger to be slanted due to the center of gravity.
There was a risk that the workpiece would fall from the hanger.

Therefore, it is necessary to develop a device that can automatically and reliably attach and detach a workpiece to and from a diagonal arm.

Note that it is necessary to attach and detach the workpiece without stopping the hanger container.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic workpiece loading/unloading device that can reliably load, unload, or load/unload a workpiece onto/from a moving obliquely provided arm.

[Means for solving problems]

An automatic workpiece loading/unloading device according to the present invention that is capable of loading and unloading a workpiece or both loading and unloading a workpiece according to the present invention includes a hanger having an arm that is transferred in the feeding direction of the workpiece and holds the workpiece on a suspended support; The work is set with a hanger holding means that is transferred at the same speed as the hanger and grips the lower end of the hanger support during loading of the work to suppress swinging of the support, and a trolley that can run at the same speed as the feed speed of the work. a rail extending in the same direction as the direction of the arm and fixed to the trolley in a plane perpendicular to the direction of movement of the arm; a frame slidably supported on the rail; and a drive for sliding the acid frame on the rail. upper workpiece holding means supported on the frame so that the vertical position can be adjusted via the lifting means; and lower workpiece holding means supported on the frame so that the vertical position can be adjusted via the lifting means. It consists of something with the following.

[Operation] In the automatic workpiece removal device configured as described above,
The workpiece is held between the upper workpiece holding means and the lower workpiece holding means. The upper workpiece holding means and the lower workpiece holding means are provided on a frame that can slide in the same direction as the arm via a lifting means, so that the workpiece held by the workpiece holding means moves along the direction in which the arm extends. It can be moved without interfering with the arm and can be loaded or pIHed.

Further, since the workpiece holding means is moved by the cart at the same speed as the feed speed of the workpiece, the workpiece can be attached to and removed from the hanger without stopping the hanger container.

Furthermore, since the lower end of the hanger support is held by the hanger holding means during loading of the workpiece, swinging of the hanger is suppressed and the workpiece is prevented from falling.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the automatic workpiece loading/unloading device according to the present invention will be described below with reference to the drawings.

1 to 5 show an automatic workpiece loading/unloading device according to an embodiment of the present invention. FIG. 6 shows the arrangement of the automatic workpiece loading/unloading device and the hanger container hair.

In FIG. 6, 1 indicates a coating booth for electrostatic coating, and 2 indicates a hanger conveyor that conveys a disk wheel as a workpiece. The hanger conveyor 2 is provided to pass through the coating booth 1, and automatic workpiece loading and unloading devices 3 and 4 for loading and unloading workpieces to and from the hanger conveyor 2 are provided at the front and rear of the painting booth 1. The automatic workpiece loading/unloading (loading) device 3 installed in the front of the painting booth 1 is
An automatic workpiece loading/unloading device 4, which is used exclusively for mounting workpieces and is provided at the rear of the coating booth 1, is used exclusively for removing the workpieces. Since the automatic workpiece loading/unloading device 3 and the automatic workpiece loading/unloading device 4 have almost the same structure, the following explanation will be given only to the automatic workpiece loading/unloading device 4 provided at the rear of the painting booth 1. A description of the automatic workpiece loading/unloading (loading) device 3 in the front will be omitted.

FIG. 7 shows the hanger portion of the hanger-conhair for transporting the workpiece (disc wheel).

In the figure, 5 indicates a hanger of the hanger conveyor 2, and a large number of hangers 5 are electrically conductive and are attached to the hanger conveyor 2. The hanger 5 is provided with a column 6 extending in the vertical direction at the center thereof, and the column 6 is connected to the hanger conveyor 2. The support column 6 is provided with an arm 7 that extends obliquely upward, and the arm 7 is attached in a direction perpendicular to the traveling direction of the hanger conveyor 2. Two arms 7 are provided on each side of the pillar 6, and their mounting positions are shifted in the vertical direction. A rod 8 is provided on both sides of the column 6 to connect the arm 7 in the vertical direction, and both ends of the rod 8 are connected to the column 6 by a horizontal bar 9. A square holding member 10 is attached to the lower end of the support column 6 and is held by hanger holding means, which will be described later.

Figures 1 to 5 show the automatic workpiece loading/unloading device 4.
It shows. In the figure, 11 indicates a trolley, and the trolley 1
The center of the hanger 1 in the running direction is aligned with the center of the hanger 5. The trolley 11 includes an underframe 12, a running drive section 13, and a running section 14.
It consists of

The underframe 12 is formed of channel steel or the like.
A traveling drive section 13 is disposed on the upper surface of the underframe 12, and a traveling section 14 is disposed on the lower surface of the underframe 12.

The traveling drive unit 13 includes a variable speed motor 15, a reducer 16, and a clutch 17, which are connected to a coupling 18.
．． 19.

A sprocket 20 is attached to the output shaft of the clutch 17, and a roller chain 21 as a driving force transmission means is attached to the sprocket 20.

The traveling section 14 includes wheels 22 and an axle 23, and the axle 22 is provided at both ends of the axle 23.

The axle 23 is supported by the underframe 12 by a bearing 24, and a sprocket 25 is provided on the axle 23. The sprocket 25 includes the roller chain 21 described above.
is mounted so that the driving force from the travel drive unit 13 is transmitted to the wheels 23.

Therefore, the trolley 11 is configured so that the same speed as the feed speed of the workpiece (disc wheel) 26 placed on the arm 7 of the hanger 5 can be obtained by adjusting the variable speed motor I5 once. In addition, 27 shows the rail of the trolley|bogie 11, and 28 shows the frame of the rail 27.

A rail 30 on which the frame 29 slides is fixed to the upper surface of the truck 11. Two rails 30 are provided, and the rails 30 are fixed at symmetrical positions centering on the above-mentioned hanger 5. One rail 30 is lower in height than the other rail 30, and the rail 30 is lower in height than the other rail 30.
0 extends with the same slope as the slope of the arm 7 of the hanger 5 on which the workpiece 26 is set. That is, the mounting angle of the rail 30 and the mounting angle of the arm 7 on the side for attaching and detaching the workpiece 26 are matched.

A frame 29 is mounted on the rail 30. The frame 29 is slidable with respect to the rail 30 by a sliding bearing 31 attached to the lower part of the frame 29. At the center of the rail 30, there is an air cylinder 3 as a driving means for slidingly driving the frame 29.
2 is provided. The tip of the rod of the air cylinder 32 is connected to the frame 29, and the air cylinder 3
2, the frame 29 can approach and leave the hanger 5. The frame 29 extends upward, and a slide holder 33 is attached to the side surface of the frame 29 on the hanger side.

As shown in FIG. 3, a screw jack 34 is provided at the top of the slide holder 33 as a lifting means. An input shaft 35 of the screw jack 34 is connected to a heel gear 37 via a coupling 36. hehergia 37
is meshed with the heel gear 38, and the shaft 39 on the heel gear 38 side is connected to the universal joint 40.
It is connected to the shaft 41 via. shaft 41
The vicinity of the end of the shaft 41 is supported by a bearing 42, and the shaft 41
A handle 43 is attached to the end of the handle. An upper workpiece holding means 46 and a lower workpiece holding means 47 are suspended from the output shaft 44 of the screw jack 34. As a result, the upper workpiece holding means 46 and the lower workpiece holding means 4
The vertical position of 7 can be adjusted by rotating the handle 43.

The second work holding means 46 is composed of a connecting bar 48 and an upper clamp arm bin 49.

The connecting bar 48 extends upward along the slide holder 33, and the upper end of the connecting bar 48 is connected to the output shaft 44 of the screw jack 34. The upper clamp arm bins 49 are fixed to the connecting bar 48 one by one in the vertical direction, and the upper clamp arm bins 49 are attached right sideways in a direction perpendicular to the direction in which the hanger 5 moves.

The lower work holding means 47 is attached to the connecting bar 48 of the upper work holding means 46 via an air cylinder 52. The lower work holding means 47 is composed of a lower clamp arm bin 50, a slide shaft 51, and an air cylinder 52 as a clamp driving means. The lower clamp arm pins 50 are arranged one each in the vertical direction,
It is designed to be used as a pair with the above-mentioned upper clamp arm bin 49. The lower clamp arm pin 50 is temporarily attached to slide on a slide shaft 51, and both ends of the slide shaft 51 are fixed to the connecting bar 48. That is, the workpiece 26 is held between the upper clamp arm bin 49 and the lower clamp arm bin 50.

Near the end of the rail 20 on which the trolley 11 runs, there is a
An air cylinder 53 is provided as a quick return means. The air cylinder 53 is connected to the frame 2 via the support member 54.
The loft 54□ of the air cylinder 53 is fixed at
is connected to the truck 11. This air cylinder 53
is for quick return after the trolley 11 is sent by the variable speed motor 15. During quick return, the clutch 17 of the travel drive section 13 is disengaged and the air cylinder 53 is operated. .

The trolley 11 is provided with hanger holding means 55 that holds the holding member 10 at the lower end of the hanger 5 during loading of the workpiece 26. As shown in FIGS. 4 and 5, the hanger holding means 55 has two shafts inserted through a support member 57 provided on a plate 56, and holds the hanger 5 on each shaft. A pair of 7 holding the member 10
A clamper 59 in the shape of a letter is attached. Gear 60 is attached to shaft 5, and gear 60 and rack 6
1 is engaged. The rack 61 is connected to an air cylinder 62, and the operation of the air cylinder 62 causes the shaft 5 to rotate and the clamper 59 to open and close.

Note that the trolley 11 is provided with a frame 63 that is separate from the frame 29 to which the work holding means is attached. Two pushers 64 that press the workpiece 26 in an oblique direction are attached to the frame 63, and the pushers 64 are connected to an air cylinder 65.

Next, the operation of the automatic workpiece attachment/detachment device described above will be explained.

The workpiece 26 electrostatically coated in the coating booth 1 is placed on the hanger 5.
The workpiece automatic attachment/detachment device 4 is set on the arm 7 of
entered inside. The trolley 11 is usually waiting on the side of the single air cylinder 53, and when the workpiece 26 comes to a predetermined position, the variable speed motor 15 is started, and the trolley 11 moves towards the hanger 5 in the same traveling direction as the hanger 5. They run at the same speed. That is, when the positions of the work 26 and the work holding means match, the cart 11 is moved at the same speed as the feed speed of the work 26.

At the same time, the holding member IO at the lower end of the hanger 5 is held by the hanger holding means 55 attached to the trolley 11, and swinging of the hanger 5 is suppressed.

When the above operation is completed, the air cylinder 32 that slides and drives the frame 29 is operated, and the frame 29 slides forward on the rail 30 and stops just in front of the hanger 5. In this case, since the lower clamp arm pin 50 of the lower work holding means 47 is lowered, interference between the lower clamp arm bin 50 and the work 26 is prevented. frame 2
When the clamp 9 stops, the air cylinder 52 as a clamp driving means is activated, and the two lower clamp arm pins 50 are raised. As a result, the two workpieces 26 are simultaneously attached to the upper clamp arm pin 49 and the lower clamp arm pin 5.
0 and is held between.

When it is confirmed that the workpiece 26 is held, the air cylinder 32 is activated, and the frame 29 is moved back and stopped at a predetermined position.

When it is confirmed that the frame 29 has stopped, the air cylinder 52 that was clamping the workpiece 26 is activated, the lower clamp arm pin 50 is lowered, and the workpiece 26 is released from being held. Further, the clamper 59 of the hanger holding means 55 that holds the holding member 10 at the lower end of the hanger 5 is also opened, and the holding of the hanger 5 is completed.

When the workpiece 26 is released from being held, the workpiece 26 is held by the lower clamp arm pin 50. The workpiece 26 is then pushed out diagonally by the pusher 64 and carried out from the automatic workpiece attachment/detachment device.

When the workpiece 26 is completely unloaded, the clutch 17 of the travel drive unit 13 of the truck 11 is activated, and the function of transmitting the motor driving force to the axle 22 is interrupted. That is, the axle 22 becomes free to rotate. In this state, the air cylinder 53 for single-chamber loading of the trolley
is activated, and the trolley 11 is returned to the initial waiting position. Then, the cart 11 waits at this position until the next workpiece 26 comes to a predetermined position.

Note that since there are multiple types of workpieces 26 with different outer diameters, in this embodiment, the positions of the upper workpiece holding means 46 and the lower workpiece means 47 are adjusted depending on the size of the diameter of the workpiece 26. Since the lower clamp arm pin 50 of the side work means 47 can be moved up and down by the air cylinder 52, only the upper clamp arm pin 49 is aligned with the vicinity of the upper part of the work 26 set on the hanger 5. . This positioning of the upper clamp arm pin 49 is performed by rotating the handle 43 connected to the screw jack 34.

The above-mentioned operation is explained for detaching the workpiece 26 from the hanger 5, but the operation for mounting the workpiece 26 is almost the same as the above-mentioned operation. That is, if the moving speed of the cart 11 and the feed speed of the workpiece 21 match, and the upper and lower workpiece holding means 46 and 47 move back and forth along the inclination of the arm 7, the workpiece 26 will be moved by the arm of the hanger 5. It can be reliably attached and detached without interfering with 7.

Further, the traveling drive unit 13, air cylinders, and other equipment are controlled by an electric control device (as shown), and the electric control device is interlocked with the hanger conveyor 2.

In this example, the workpiece was attached to and removed from the inclined arm, but if the inclination of the rail matches the direction in which the arm extends, it is possible to attach and detach the workpiece even when the arm is placed horizontally. It is.

〔Effect of the invention〕

As explained above, when using the automatic workpiece loading/unloading device of the present invention, the workpiece can be automatically loaded/unloaded onto the moving arm, so the workpiece can be reliably loaded/unloaded without stopping the hanger conveyor. Loading and unloading can be carried out. As a result, the production efficiency of the line can be significantly improved.

Furthermore, since the hanger holding means suppresses swinging of the hanger during loading of the workpiece, the workpiece is prevented from falling. Therefore, it is possible to prevent damage to the workpieces, and it is possible to significantly shorten the time during which the hanger conveyor is stopped due to trouble.

[Brief explanation of drawings]

Fig. 1 is a front view of the automatic workpiece loading and unloading device of the present invention, Fig. 2 is a side view of Fig. 1, Fig. 3 is an enlarged view of the vicinity of the lifting means in Fig. 1, and Fig. 4 is a
FIG. 5 is a front view of FIG. 4, FIG. 6 is a layout of the automatic workpiece loading/unloading device, and FIG. 7 is a front view of the hanger of the hanger conveyor. 2...Hanger conveyor 3.4...Workpiece automatic loading/unloading device 5...Hanger 7...Arm] 1...Dolly 26...Workpiece 29...Frame 30...Rail 32...Air cylinder 34 as a slide drive means for the frame...Screw jack and key 46 as lifting means
...Upper work holding means 47...Lower work holding means 55...Hanger holding means Applicant Tobie Gyo Co., Ltd. Figure 3

Claims (1)

[Claims] (1) A hanger that has an arm that is transferred in the workpiece feeding direction and holds the workpiece on a suspended support, and a hanger that is transferred at the same speed as the hanger and grips the lower end of the hanger support while loading the workpiece to prevent the support from swinging out. a hanger holding means for suppressing the movement of the workpiece; a trolley capable of traveling at the same speed as the feed speed of the workpiece; a rail, a frame slidably supported on the rail, a driving means for sliding the frame on the rail, and an upper work holding means supported on the frame so that its vertical position can be adjusted via a lifting means. , further comprising: a lower work holding means supported by the frame so as to be adjustable in vertical position via the elevating means; Automatic attachment/detachment device for workpieces.