JPH0717627A - Workpiece transfer device - Google Patents

Abstract

PURPOSE:To reduce production cost with a simple structure while reducing impact of a workpiece in the start and stop and enabling high speed transfer by transmitting the movement of a rotary drive arm to a slide shaft through a connecting rod. CONSTITUTION:A device mounting plate 5 is provided at a proper position, and a slide shaft 3 guided in a fixed direction by a guide rail 4 is movably provided in a frame 2 of a body 1. A rotary drive arm 12 for driving the slide shaft is connected to the slide shaft 3 through a long connecting rod 15. Stoppers 20, 21 are disposed such that the rotary drive arm 12 starts and stops at a position where the connecting part of a connecting rod 15 and the rotary drive arm 12 crosses perpendicularly to the axis of the slide shaft 3. When a rotary drive motor 13 is driven, the slide shaft 3 begins to be slowly lowered and when the rotational angle of the rotary drive arm 12 is small and then gradually accelerated. The acceleration is maximized at 90 deg. of the rotational angle and the slide shaft 3 is gradually decelerated when the rotational angle exceeds 90 deg.. The lowering speed reaches zero when the rotational angle reaches 180 deg. to reduce the impact to a workpiece started and stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a work piece held between a carry-in station and a processing station in which a work piece held by a clamp device is immersed in a cleaning liquid in a cleaning tank for cleaning. The present invention relates to a workpiece transfer device for transferring a workpiece.

[0002]

2. Description of the Related Art As a workpiece transfer device of this type, there is one used in the cleaning device described in Japanese Utility Model Publication No. 63-7344. The workpiece transfer device of the cleaning device described in this publication is provided with a rotary drive shaft connected to a rotary drive motor across a cleaning chamber and a drying chamber, which are provided independently of each other. A rotary unit including a circular rotary plate and a plurality of clamp mechanisms radially attached to the rotary plate is provided on the outer peripheral portion of each of the cleaning chamber and the drying chamber.

Further, the transfer of the workpiece from the cleaning chamber to the drying chamber is carried out by a transfer bar having one end connected to a cylinder device, which is provided in the lower part of the rotary drive shaft and in parallel with the rotary drive shaft.

When cleaning and drying the workpiece, the workpieces sent to the cleaning chamber and the drying chamber by intermittent feeding are grasped by the clamp mechanism of the cleaning chamber and the drying chamber, and then rotated. The work piece is transferred to the washing station in the washing chamber and the drying station in the drying chamber by rotating the rotary plate together with the drive shaft, and a large number of washing nozzles and drying nozzles are provided for each station to serve the purpose. The workpiece was washed and dried.

However, the conventional workpiece transfer device of the cleaning device is provided with a rotary unit provided with a clamp mechanism on a rotary drive shaft provided separately between a cleaning chamber and a drying chamber which are independent from each other, and Since the gripped workpiece is transferred to the cleaning station of the cleaning chamber where a large number of nozzles are arranged and the drying station of the drying chamber,
There is a problem that the structure of the main body of the cleaning device becomes complicated and the maintenance cost becomes high.

Therefore, a cleaning device having a work transfer device for improving these problems has been devised and already filed (see Japanese Patent Application No. 4-225158). As shown in FIG. 4, this apparatus has a cleaning tank 71 which is a cleaning processing station in the lower part, and a rotary drive shaft 74 which is horizontally arranged in a cleaning chamber 73 which has an air blow nozzle 72 which is a draining processing station in the upper part. A rotary plate 75 is fixed to the rotary drive shaft 74, and a plurality of clamp devices are radially arranged on the rotary plate 75 at equal intervals.
76 is rotatably mounted, the workpiece is gripped by the clamp device 76, and the rotary drive shaft 74 is rotationally driven to rotate the rotary plate 75.
Is rotated, the workpiece is immersed in the cleaning liquid 77 in the cleaning tank 71, and predetermined cleaning is performed.After cleaning, the rotary drive shaft 74 is rotated to move the workpiece to the position of the air blow nozzle 72. It is designed to be dried.

[0007]

However, in the conventional workpiece transfer device, a rotary plate is fixed to a rotary drive shaft horizontally provided in the cleaning chamber, and a plurality of clamping devices are radially arranged at regular intervals on the rotary plate. After mounting, hold the workpiece with the clamp device and rotate the rotary drive shaft to rotate the rotating plate to immerse the workpiece in the cleaning liquid in the cleaning tank, which is the cleaning processing station. Re-rotates the rotary plate to move the work piece to the position of the air blow nozzle, so the size of the device must be increased and the installation area must be large, and the manufacturing cost is high. There was a problem that became.

As a means for reducing the size of the work piece transfer device and reducing the manufacturing cost, the clamp device is connected to the piston rod of the hydraulic cylinder device, and the work piece is placed and clamped by the clamp device. However, it is possible to immerse this workpiece in the cleaning liquid of the cleaning tank, but in this technique, when the workpiece is started or stopped, a sudden pressure is applied by the hydraulic pressure, There is a problem that the impact becomes large, the work piece and the transfer device body and the clamp device are damaged, and the work piece takes a long time to be transferred, and a predetermined cycle time cannot be achieved.

The present invention has been made in order to solve the above-mentioned problems of the prior art. With a very simple structure, the maintenance cost can be reduced, the size of the apparatus can be suppressed, and the manufacturing cost can be reduced. It is an object of the present invention to provide a workpiece transfer device which has a small impact and is capable of high speed transfer.

[0010]

As a means for solving the above problems, the present invention provides a workpiece transfer device movably on a main body frame of a workpiece transfer device main body, and
A sliding shaft provided with a device mounting plate in a proper position, a guide member for guiding the sliding shaft in a fixed direction, a rotary drive arm provided so that its axis is parallel to the axis of the sliding shaft, and the rotation shaft. The drive arm and the sliding shaft are rotatably connected via a connecting rod longer than the turning radius of the rotary driving arm, and the connecting portion between the connecting rod and the rotary driving arm is an axis line of the sliding shaft. And a rotation drive means for rotating the rotation drive arm, the stopper being configured to start and stop the rotation drive arm at a position intersecting at a right angle with the stopper for suppressing rotation of the rotation drive arm. It is what

[0011]

Since the present invention is constructed as described above,
For example, when the workpiece grasped by the clamp device is immersed in the cleaning liquid in the cleaning tank for cleaning, the clamp device is lowered into the cleaning tank. In that case, when the rotary drive means is operated, the rotational force is transmitted to the rotary drive arm, and the rotary drive arm rotates about the rotary drive means. At this time, the connecting portion between the rotary drive arm and the connecting rod rotates about the rotary drive means from an upper position intersecting the axis of the sliding shaft at a right angle.

When the rotary drive arm rotates, the connecting rod connected to the rotary drive arm is pushed and gradually pushed down. When the connecting rod is pushed down, the sliding shaft is guided by the guide member and moves downward and descends.

In this way, when the rotary drive arm rotates and the rotary drive arm comes into contact with the stopper for suppressing the rotation of the rotary drive arm, the operation of the rotary drive means is stopped,
The rotation of the rotary drive arm stops. At this time, the connecting portion between the rotary drive arm and the connecting rod reaches the lower position just intersecting at right angles with the axis of the sliding shaft, and the sliding shaft reaches the lower end.

That is, when the rotation angle of the rotary drive arm is small, the amount of downward movement of the connecting portion between the rotary drive arm and the connecting rod is small, so that the sliding shaft starts to descend slowly and the rotary drive arm moves downward. As the rotation angle increases,
Gradually accelerate, the rotation angle of the rotary drive arm is 90 °
When it reaches, the maximum speed is reached, and when it exceeds 90 °, it decelerates gradually, and when it reaches 180 °, it reaches 0.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, reference numeral 1 indicates a workpiece transfer device main body, and reference numeral 2 indicates a main body frame of the workpiece transfer device main body 1.

Reference numeral 3 denotes a sliding shaft provided on the front portion of the main body frame 2 so as to be vertically movable. On both side surfaces of the sliding shaft 3, guide rails 4 as guide members are provided over substantially the entire length. Each is fixed. Reference numeral 5 indicates a device mounting plate fixed to the tip end of the sliding shaft 3, and reference numeral 6 indicates substrates respectively arranged on both side surfaces of the sliding shaft 3. The board 6 is fixedly supported by a support bracket 7 fixed to the body frame 2.

Reference numeral 8 is a roller holder that is vertically fixed to the substrate 6. A pair of cam followers 9 are rotatably mounted on the roller holder 8 so as to sandwich the guide rail 4 from both sides, and a guide roller 10 is provided. It is rotatably mounted by a hinge pin 11 so as to press the top of the guide rail 4.

Therefore, the sliding shaft 3 is attached to the guide rail 4
And guided by the cam follower 9 and the guide roller 10 mounted on the roller holder 8 to move in a fixed direction, that is, up and down.

Reference numeral 12 is a rotary drive arm provided so that its axis is parallel to the axis of the sliding shaft 3. The base end of the rotary drive arm 12 is a rotary drive motor with a reduction gear provided on the top of the main body frame 2. The rotary drive shaft 13a of 13 is connected via a connector 14.

Reference numeral 15 is a connecting rod, and one side of the connecting rod 15 is rotatably connected to the top of the rotary drive arm 12 by a fastener 17 via a rod end 16 attached to the connecting rod 15.

The other side of the connecting rod 15 is rotatably connected to the middle part of the sliding shaft 3 by a fastening member 19 via a rod end 18 attached to the connecting rod 15.

Reference numerals 20 and 21 are stoppers for suppressing the rotation of the rotary drive arm 12, and the stoppers 20 and 21 are the rotary drive shaft 13a of the rotary drive motor 13 with a reduction gear on the top of the main body frame 2.
It is mounted so that it can be adjusted in appropriate places on both sides of the axis line.

Reference numerals 22 and 23 denote stoppers provided on the arm 24 fixed to the connector 14. This stopper
22 and 23 are provided so as to be able to contact the stoppers 20 and 21. When the stopper 22 is in contact with the stopper 20 and when the stopper 23 is in contact with the stopper 21, the axis line of the connecting portion connecting the rotary drive arm 12 and the connecting rod 15, that is, the axis line of the fastening member 17 is slidable. It is located at a position that intersects the axis of the moving shaft 3 at a right angle.

Reference numerals 25 and 27 denote sprockets rotatably mounted on brackets 26 and 28 fixed to appropriate positions of the main body frame 2, and reference numeral 29 denotes a clasp fixed to appropriate positions of the sliding shaft 3. There is.

Reference numeral 30 designates the sliding shaft 3 and a balance weight having a weight substantially equal to the load imposed on the sliding shaft 3,
Balance weight 30 is sprocket 2 by chain 31
It is connected to the clasp 29 via 5, 27.

Reference numeral S1 indicates a rotary clamp device mounted on a device mounting plate 5 fixed to the tip of the sliding shaft 3. The rotary clamp device S1 clamps the workpiece and immerses the workpiece in the cleaning liquid S3 in the cleaning tank S2 provided below for cleaning.

Next, the operation of this embodiment will be described. First,
As shown in FIGS. 1 and 2, the workpiece transfer device body 1 is at the original position. That is, the stopper 22 fixed to the connector 14 contacts the stopper 20 provided on the top of the main body frame 2 to connect the rotary drive arm 12 and the connecting rod 15 to each other.
The axis of 17 is exactly at the upper position intersecting the axis of the sliding shaft 3 at a right angle, and the sliding shaft 3 is at the rising end.

Therefore, the workpiece is clamped by the rotary clamp device S1 attached to the tip of the sliding shaft 3, the rotary drive motor 13 with a reduction gear is operated, and the rotary drive shaft 13a is moved in the X'direction (see FIG. 1). Rotation), the rotational force is transmitted to the rotary drive arm 12 via the coupler 14, and the rotary drive arm 12 is rotated.
Also rotates in the X'direction.

When the rotary drive arm 12 rotates in the X'direction, the connecting portion between the rotary drive arm 12 and the connecting rod 15 also moves in the X'direction and gradually moves downward, and the connecting rod 15 is moved. Push down.

When the connecting rod 15 is pushed down, the sliding shaft 3 is guided by the guide rail 4, the cam follower 9 and the guide roller 10 and moves downward and descends.

In this way, when the rotary drive arm 12 rotates and the stopper 23 fixed to the coupler 14 abuts on the stopper 21 provided on the top of the main body frame 2, the rotary drive motor 13 with reduction gear is driven. The operation is stopped, and the rotation of the rotary drive arm 12 is stopped. At this time, the rotary drive arm 12 and the connecting rod 15
The axis of the fastener 17 that connects the two axes reaches the lower position that intersects the axis of the sliding shaft 3 at a right angle, and the sliding shaft 3 reaches the lower end.

Therefore, when the rotation angle of the rotary drive arm 12 is small, the amount of downward movement of the connecting portion between the rotary drive arm 12 and the connecting rod 15 is small, so that the sliding shaft 3 begins to descend slowly. As the rotation angle of the rotary drive arm 12 increases, it gradually accelerates, reaches the maximum speed when the rotation angle of the rotary drive arm 12 reaches 90 °, and gradually decelerates when it exceeds 90 °, then 180 °. It reaches 0 when is reached.

Accordingly, when the stopper 22 is in contact with the stopper 20, the upper position where the axis of the fastening metal fitting 17 for connecting the rotary drive arm 12 and the connecting rod 15 intersects at right angles with the axis of the sliding shaft 3. When the rotary drive arm 12 rotates exactly 180 °, the stopper 23 comes into contact with the stopper 21, and the stopper 20 and the stopper 20 are placed so that the axis line of the fastener 17 crosses the axis line of the sliding shaft 3 at a right angle. Adjust the stopper 21.

On the other hand, the workpiece clamped by the clamp device S1 attached to the tip of the sliding shaft 3 is gradually immersed in the cleaning liquid S3 stored in the cleaning tank S2 as the sliding shaft 3 descends. Then, when the sliding shaft 3 reaches the lower end, the workpiece reaches a predetermined position immersed in the cleaning liquid S3 in the cleaning tank S2.

When the workpiece reaches a predetermined position immersed in the cleaning liquid S3 in the cleaning tank S2, the high-pressure cleaning liquid is supplied from the high-pressure cleaning nozzle (not shown) in the cleaning tank S2 while rotating the workpiece with a rotation drive device (not shown). Is sprayed toward the work piece to wash the work piece.

When the cleaning of the workpiece is completed, the rotary drive motor 13 with a speed reducer is activated again, and this time the rotary drive shaft 13a of the rotary drive motor 13 with a speed reducer is rotated in the X direction to rotate the rotary drive arm 12. The sliding shaft 3 is rotated in the X direction and the sliding shaft 3 is lifted by the operation opposite to the above, and is returned to the original position.

When the sliding shaft 3 returns to its original position, the workpiece is removed from the clamp S1 and one cycle is completed. The workpiece transfer device of the present invention is not limited to this embodiment, and many other devices can be used.

[0038]

As described above, according to the present invention, the sliding shaft provided on the main body of the workpiece transfer device moves gently at the time of starting the rotary drive arm, and as the rotary angle of the rotary drive arm increases. , Accelerate, and the rotation angle of the rotary drive arm
The speed is gradually reduced when it exceeds 90 °, and becomes 0 when it reaches 180 °. Therefore, it is possible to start and stop the workpiece clamped by the clamp device attached to the tip of the sliding shaft. The impact at that time becomes small, and the workpiece, the clamp device, and the workpiece transfer device main body are not damaged by the impact, and the workpiece can be transferred at high speed.

Further, since the structure is simple, the main body of the workpiece transfer device can be miniaturized, the manufacturing cost can be reduced, and the maintenance cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a workpiece transfer device according to the present invention.

2 is a side view of that of FIG. 1. FIG.

3 is a plan view of that of FIG. 1. FIG.

FIG. 4 is a front view of a cleaning device including a conventional workpiece transfer device.

[Explanation of symbols]

 1 Workpiece transfer device main body 2 Main body frame 3 Sliding shaft 4 Guide rail 12 Rotation drive arm 13 Rotation drive motor 15 Connecting rod 20 Stopper 21 Stopper 22 Stopper 23 Stopper

Claims (1)

[Claims] 1. A slide shaft movably provided on a main body frame of a workpiece transfer device main body and having a device mounting plate in a proper position, a guide member for guiding the slide shaft in a fixed direction, and an axis line. A rotary drive arm provided so as to be parallel to the axis of the slide shaft, and the rotary drive arm and the slide shaft are rotatably connected via a connecting rod longer than the rotation radius of the rotary drive arm. The rotation of the rotary drive arm is arranged so as to start and stop the rotary drive arm at a position where the connecting portion between the connecting rod and the rotary drive arm intersects the axis of the sliding shaft at a right angle. And a rotation drive means for rotating the rotation drive arm.