JPS59194915A - Work transport device - Google Patents

Abstract

PURPOSE:To provide possibility of giving a work the optimum attitude by equipping a hanger having a stationary part fixed to the conveyor and a work mounting tool coupled with said stationary part rotatably, and by turning and stopping the work at any desired position. CONSTITUTION:Each of the hangers 2 suspended at an overhead type chain conveyor 1 at a certain spacing is composed of a stationary part 3 fixed to the conveyor 1 and a work mounting tool 4 coupled with this stationary part 3. The work mounting tool 4 consists of a cylindrical coupling 5 coupled rotatably with the stationary part 3 through a bearing, a rod 7 installed plumb at the bottom of said coupling 5, and a pair of support tables 8, 8 installed to this rod 7. When a gear 11 fixed to a coupling 6 meshes with a chain 14 wound round sprockets 12, 13, the support table 8, i.e. the work 9 thereupon, is rotated to receive coating. The coating is performed by a coating robot 10.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a workpiece transfer device used in a work device such as a painting device, and which is capable of transferring the workpiece while rotating it as necessary. be.

For example, a coating device that automatically coats workpieces to be coated using a utility port is equipped with a workpiece transfer device that has a conveyor and a hanger suspended from the conveyor. The coating is carried out while the workpiece is being transported by the workpiece transport device. When painting the entire circumference of a workpiece, it is necessary to use a workpiece transfer device equipped with a co-rotation mechanism that rotates the workpiece while it is being transferred, and to rotate the workpiece appropriately during the painting process. 〇 Conventionally, a co-rotating mechanism of a work transfer device has a gear-shaped rotating member connected to a hanger and a sawtooth member provided along a conveyor and meshing with the rotating member. There is known a structure in which the workpiece is rotated together with the rotating member by meshing the rotating member with the rotating member.

However, the above-mentioned prior art had various disadvantages as shown below. First of all, the engagement position and the disengagement position of the rotating member with the sawtooth member are regulated by the arrangement position and length of the sawtooth member, and the rotation start position and the rotation stop position of the workpiece are fixed. Secondly, it is impossible to change this as appropriate, and it is also inconvenient that it is impossible to control the rotation to be stopped midway.

Secondly, in order to allow the workpiece to be transported not only in a rotating state but also in a non-rotating state, there are two positions where the sawtooth member can engage with the rotating member and a position where it cannot engage with the rotating member. It has a configuration that can be displaced between
For this purpose, it is necessary to precisely position the sawtooth member, and there is also the disadvantage that control of the displacement mechanism is extremely complicated and troublesome. Third, when the conveyor drive speed is constant, the rotational speed of the workpiece is determined by the number of teeth on the rotating member, so the workpiece can only be rotated at a constant speed, and the rotational speed is There were also inconveniences that could not be controlled. As a result, when a number of workpieces are suspended and conveyed by the same conveyor, there is a drawback that it is not possible to make each workpiece perform an optimal operation depending on the shape, painted surface, etc. of each workpiece.

The present invention has been made in order to eliminate the drawbacks of the prior art described above, and makes it possible to rotate or stop the rotation at any position depending on the type of workpiece.
Another object of the present invention is to provide a work transfer device equipped with a rotation mechanism whose rotation speed can be arbitrarily set.

In order to achieve the above-mentioned object, a workpiece transfer device according to the present invention includes a conveyor, a fixing part fixed to the conveyor, and a workpiece mounting part rotatably connected to the fixing part; A gear fixedly attached to the workpiece fixture;
A drive sprocket and an idler attached to the conveyor, a chain wound between the drive sprocket and the idler and meshed with the front d-pillar wheel, and a rotary drive motor connected to the drive sprocket. Its distinctive feature is that it is composed of the following.

With this configuration, when the motor is stopped, the gear rotates at a predetermined speed according to the number of teeth, and when the motor is rotated at the same speed as the conveyor, the gear stops rotating, and when the motor is rotated at the same speed as the conveyor. The rotational speed of the gear will change if it is rotated at a speed different from the speed. Therefore, by driving or stopping the motor appropriately, the rotation start, position, stop position, and rotational speed can be adjusted depending on the type and type of workpiece. Can be controlled arbitrarily.

Hereinafter, embodiments of the present invention will be described with reference to the drawings when used as a work transfer device in a coating device. In the figure, 1 indicates a conveyor, and the conveyor 1 is formed by an overhead chain conveyor, and is adapted to be transported by, for example, an electric motor (not shown).

A plurality of hangers 2 (Fi, only one hanger is shown in the drawing) are hung from the conveyor 1 at predetermined intervals.

The hanger 2 consists of a fixing part (5) 3 fixedly provided on the conveyor 1 and a workpiece fixture 4 connected to the fixing part 3, and the workpiece fixture 4 is constructed as shown in FIG. bearing 5
(b) A cylindrical connecting member 6 rotatably connected to the defining portion 3 via a rod 7 vertically attached to the lower end of the connecting member 6, a support base 8 attached to the rod 7, 8, and each support 8 has a workpiece 9, 9 to be painted.
．． ... has been installed. In this way, the workpieces are painted by the painting rodet 10 while the workpieces are being conveyed by the 9Fi conveyor 1 provided at the workpiece attachment 4. Then, in order to be able to apply coating to the entire circumference of the workpiece 9, the workpiece 9 is
The structure is such that it can be rotated.

Therefore, the rotation mechanism for rotating the workpiece 9 will be explained. 11 is a gear fixed to the connecting member 6 of the workpiece fixture 4, and both wheels 11 are a pair of sprockets) 12.13
It can mesh with a chain 14 made of a roller chain or the like wound therebetween. One of the sprockets 12 of the Suzorockets (6) 12, 13 is an idler, and the sprocket 12 is rotatably supported by a bracket 15 fixed to a ceiling, wall surface, etc. The other sprocket 13 is for rotational driving (Dy, yp rocket), and the sprocket 13 is connected to the output shaft of the Z7 motor 16, and the air motor 16 is attached to a bracket fixed to the ceiling, wall, etc. A guide member 18 is attached to the back side of the chain 14 at the meshing part with the gear 11, and a suppressing roller 19 is provided to apply tension to the meshing part of the gear 11. , the guide member 18, the pressing roller 19, and the chain 14 are prevented from loosening, and the gear 11 and the chain 14 are configured to mesh smoothly.

Next, 20 indicates a direction regulating plate fixedly provided to the connecting member 6 of the workpiece fixture 4, and the direction regulating plate 20 is attached to the conveyor 1.
One side of the paper is brought into contact with a guide rail 21 provided along the guide rail 21, and in this state, the paper is transported while sliding on the guide rail 21. In this way, the direction regulating plate 2
By bringing the workpiece 9 into contact with the guide rail 21, the orientation of the workpiece 9 is regulated and its swinging is prevented.

Further, the guide rail 21 is not disposed in the area where the painting work is performed, and therefore the gear 11 meshes with the chain 14 in the area, and when the gear 11 rotates, the direction regulating plate 20 also engages with the chain 14. If the workpiece 9 does not follow and rotate, a rotatable section of the workpiece 9 is defined by the direction regulating plate 20 and the idle rail 21.

The work transfer device according to the present invention has the above-described configuration, and its operation will be explained next.

First, when the workpiece 9 is to be rotated at a predetermined rated rotational speed, the air motor 16 is stopped and the chain 14 is not moved. By driving the conveyor 1 at a constant speed, the hanger 2 is conveyed in the direction of the arrow in FIG. Here, the direction regulating plate 20 is a guide rail 21
Since the workpiece 9 is in contact with the workpiece 9, the workpiece 9 will not be rotated or rocked unnecessarily, and the workpiece 9 will be transported in a stable state. Then, when the workpiece attachment A4 is conveyed to a predetermined position, the gear 11 meshes with the chain 14.

However, at the beginning of engagement between the gear 11 and the chain 14, the direction regulating plate 20 is in contact with the guide rail 21, so the gear 11 does not rotate and the chain 14 is rotated. Therefore, the direction regulating plate 20
When the gear 11 is separated from the chain 14, the gear 11 rotates while meshing with the chain 14, and the connecting member 6 fixed to the gear 11 is rotated.This causes the entire workpiece fixture 4 to rotate, and the gear 11
The workpiece 9 is rotated at a rotational speed corresponding to the number of teeth. Since the chain 14 is given tension by the pressure roller 19 and backed by the guide member 18, the chain 14 is prevented from loosening.
The gear 11 and the chain 14 mesh smoothly.

Here, in order to prevent the chain 14 from moving unnecessarily while the gear 11 meshes and rotates, the air motor must apply a resistance force greater than the inertial load of the workpiece 9 and the workpiece fixture 4 to which the workpiece 9 is attached. - The sprocket 13 should be made to act on the sprocket 13 by (9) 16.

As described above, the entire circumference of the workpiece 9 is painted by the painting rodet 10 while rotating, and after the painting is completed, the direction regulating plate 20 is brought into contact with the guide rail 21 again.
As a result, the rotation of the workpiece fixture 4 is stopped.

Next, when painting the workpiece 9 in a non-rotating state, the system rocket 13 is rotated by the air motor 16, and the chain 14 is driven at the same speed and in the same direction as the conveyor 1. Then, when the workpiece fixture 4 is conveyed by the conveyor 1, the gear 11 meshes with the chain 14, but since the chain 14 is conveyed at the same speed and in the same direction as the conveyor 1, the gear 11 and the chain 14 engage with each other. It will be transported in a non-rotated state while maintaining the anastomotic state. Therefore, the workpiece 9 does not rotate even during the painting operation. Here, in order to transport the chain 14 at the same speed as the conveyor 1, the air motor 16
It is necessary to adjust the rotation speed of the conveyor 1 to the speed of the conveyor 1, but for this purpose, for example (10), the moving speed of the hanger 2 must be detected with a pulse transmitter, etc.
The rotation speed of the drive motor of the conveyor 1 may be detected, and the operation of the air motor 16 may be controlled based on this.

Furthermore, when changing the rotational speed of the workpiece 9, the air motor 16 may be driven so as to transport the chain 14 with a speed history different from that of the conveyor 1. Therefore, when the chain 14 is transferred in the same direction as the transfer direction of the conveyor 1 and at a slower speed than the conveyor 1, the rotational speeds of the workpiece fixture 4 and the workpiece 9 are reduced from the above-mentioned rated rotational speed, and the air motor 16 If the chain 14 is transferred in the opposite direction to the conveyor 1 by reversing the rotation speed, the rotational speed of the workpiece 9 will be increased from the rated rotational speed. On the other hand, if the chain 14 is moved in the same direction as the conveyor 1 and at a higher speed than the conveyor 1, the workpiece 9 can be rotated in the opposite direction to the aforementioned rotation direction.

Therefore, by simply driving, stopping, and changing the rotational speed of the air motor 16, the workpiece 9 can be rotated or stopped, and the rotational speed and direction can also be controlled arbitrarily. be able to. For this reason, even when different types of workpieces are conveyed on the conveyor 1, by controlling the air motor 16, each workpiece can be rotated or stopped as appropriate, depending on each workpiece. This allows for optimal painting. In addition, even if the workpiece is a single workpiece, if the coating surface is not uniform over the entire circumference or if only a part of the workpiece is to be painted, the rotation speed may be changed or the rotation may be stopped while the workpiece 9 is being transported. The quality of the coating can be improved by rotating it or rotating it in the opposite direction.

As explained above, the workpiece transfer device according to the present invention is configured such that the workpiece fixture is provided with a gear, the gear is meshed with the chain, and the chain can be transferred by the motor. The workpiece installed on the workpiece fixture can be rotated or stopped as appropriate, and the rotational speed and direction can also be changed. Therefore, various effects such as good workability on the workpiece and improved work quality are achieved.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
The plan view of the figure and FIG. 3 are longitudinal cross-sectional views of the connecting member. 1... Conveyor, 2... Hanger, 3... Fixed part,
4... Work fixture, 9... Work, 11... Gear, 12° 13... Sprocket, 14... Chain, 16... Air motor, 18... Guide member, 1
9...press roller. (13)

Claims (4)

[Claims] (1) a conveyor, a hanger having a fixing part fixed to the conveyor, a workpiece fixture rotatably connected to the fixing part, and a gear fixed to the workpiece fixture;
9 drive strips and an idler attached to the conveyor, and the drive strip location. A work transfer device comprising: a chain 7 which is wound between a gear and an idler and meshes with the gear; and a rotary drive motor which is connected to the drive sprocket. (2) The work transfer device according to claim (1), wherein the chain is provided with a guide member for preventing loosening and a roller for applying tension at a portion where the chain engages with the sprocket. (3) The work transfer device according to claim (1), wherein the motor is an air motor. (4) The work transfer device according to claim (1), wherein the motor is a reversible motor.