JPH09192927A - Deburring device for plastic products - Google Patents

Abstract

PROBLEM TO BE SOLVED: To insert a cutting tool or a roller even into a narrow space so as to surely deburr a plastic product. SOLUTION: A block 2 is attached to the tip end of a robot arm 1, and a lever 3 is swingably journalled by means of a pin 9. The lever 3 is provided at its lower end a cutting tool 14 and a guide roller 4, and a spring 22 interposed between the upper part of the lever 3 and a shaft 4. The cutting tool 14 is set against the periphery of a workpiece 23 so as to deburr the latter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring device for plastic products, and more particularly to a deburring device mounted on the tip of a robot arm and moved along the peripheral edge of a plastic product, which is a workpiece, for deburring.

[0002]

2. Description of the Related Art As a deburring device for a plastic product, a device for attaching a cutting tool (blade) and a roller to a cutting tool mounting jig supported by a tool post and moving the plastic product while pressing the cutting tool and the roller. (Japanese Patent Application Laid-Open No. 6-315824). In this deburring device, the tool mounting jig is guided by the guide shaft with respect to the tool rest so as to be able to move back and forth in the work pressing direction, and when the tool mounting jig receives a reaction force from the work, It is equipped with a spring that urges the reaction force back.

[0003]

In the above-described conventional deburring apparatus, the tool mounting jig is mounted on the tool rest so as to be movable in the longitudinal direction of the shaft, and the tool mounting jig is provided on the opposite side of the tool rest. Since the cutting tool and the roller are provided at the end edges, it is considerably bulky as a whole. Therefore, when this deburring device is attached to a robot arm, it cannot be inserted into a narrow space and can only be used for deburring large plastic products.

It is an object of the present invention to provide a deburring device for a plastic product which can insert a cutting tool and a roller into a narrow space for deburring.

[0005]

A deburring device for a plastic product according to the present invention is a deburring device mounted on the tip of a robot arm which is moved along the periphery of a plastic product as a work. A block attached to the arm, a longitudinal midway portion thereof is swingably attached to the block, a front end side protrudes from the block, a rear end side is along a side surface of the block, and a tip end portion of the lever. A bite and a rotary guide roller that are provided and respectively contact the plastic product,
An elastic member interposed between the rear end portion of the lever and the block, for urging the lever in a direction to push back the bite when the bite and the roller are pressed against the work and receive a reaction force. , Is provided.

In such a deburring device for plastic products, since the cutting tool and the roller are provided at the tip of the lever protruding from the block, deburring can be performed by inserting the tip of the lever even in a narrow space. .

In the deburring device for plastic products of the present invention, a mechanism for slowing the swing of the lever may be incorporated. By doing so, it is possible to prevent the wavy cutting depth from fluctuating periodically on the deburring surface of the work.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a deburring device according to an embodiment, FIG. 2 is a perspective view of a main part thereof (a perspective view seen from the direction II in FIG. 1), and FIGS. FIG.

A block 2 is attached to the tip of the robot arm 1, and a lever 3 is swingably attached to the block 2. Block 2 has shaft 4 and base 5
Are integrally formed, and the base 5 is provided with an insertion hole 6 for the lever 3.

The lever 3 is formed by connecting an upper lever 7 and a lower lever 8. The upper lever 7 is inserted into a lever insertion hole 6, and the middle portion of the entire lever 3 in the longitudinal direction is pin 9 to form a base. It is pivotally supported by 5.

A mounting frame 10 is integrally provided below the upper lever 7, and a mounting frame 11 faces the mounting frame 10. Semi-circular recesses are provided on the facing surfaces of the mounting frames 10 and 11, respectively, and the upper portion of the cylindrical lower lever 8 is inserted into the recesses of the mounting frames 10 and 11,
When the mounting frame 10 is fastened to the mounting frame 11 with the bolts 12, the lower lever 8 is connected and fixed to the upper lever 7.

At the lower end of the lower lever 8, the mounting plate 1 is attached.
The bite 14 is fixed via 3. A guide roller 16 is provided via a roller mounting bracket 15.

As shown in FIG. 3, a flat portion 17 is provided at the lower end of the cylindrical lower lever 8, and the cutting tool mounting groove 18 provided in the flat portion 17 is fitted with the cutting tool 14. The mounting plate 13 is superposed on the flat portion 17, and the mounting plate 13 is fixed to the lower lever 8 by the bolt 19 so that the bite 14 is moved to the lower lever 8.
Fixed to

As shown in FIG. 4, the roller mounting bracket 15 is fitted in the bracket mounting groove 20 provided in the lower lever 8 and is fixed by the bolt 21.
In addition, of the tangent line of the outer peripheral surface of the guide roller 16, the bite 1
4 so that the line passing through the front end surface of the lower lever 8 is arranged outside the outer peripheral surface of the lower lever 8, that is, a part of the guide roller 16 and the front end of the cutting tool 14 both project laterally from the side peripheral surface of the lower lever 8. Are arranged as follows.

A coil spring 22 is interposed between the upper lever 7 and the shaft 4.

In order to deburr the work (plastic product) 23 with the deburring device thus constructed, as shown in FIG. 1, the cutting tool 14 is brought into contact with the peripheral edge of the work 23 and the robot arm 1 is moved. Just go. On this occasion,
Both the cutting tool 14 and the guide roller 16 are brought into contact with the peripheral edge of the work 23, the cutting tool 14 is moved in the direction indicated by the arrow S in FIG. 2, and deburring is performed.

As described above, since the cutting tool 14 and the guide roller 16 are provided at the lower end of the rod-shaped lever 3, the cutting tool 14 and the guide roller 16 can be inserted into a narrow space for deburring. Therefore, the work 23
Even if it is a toilet seat, it is possible to deburr the inner peripheral edge of the inner hole of the toilet seat.

A spring 22 is interposed between the upper lever 7 and the shaft 4. When the cutting tool 14 is pressed against the work 23, the lower lever 8 retracts in the direction of arrow A in FIG. The work 23 is prevented from being excessively strongly pressed.

In the present invention, a braking mechanism or a damper mechanism for reducing the swing speed of the lever 3 may be incorporated. Further, a damper mechanism for increasing the retreat speed in the arrow A direction in FIG. 1 and reducing the movement in the opposite arrow B direction may be incorporated.

FIG. 5 is a schematic sectional view showing an example of such a braking mechanism. A cylinder hole 24 is provided in the lever 3 and a piston 25 is slidably fitted therein. The piston rod 26 connected to the piston 25 has a lever 3
A plate 27 is fixed to the tip of the piston rod 26 so as to project outward. The spring 22 is interposed between the plate 27 and the outer surface of the lever 3. The piston 25 has a small hole 28 for communicating the cylinder chambers on both sides of the piston 25. The cylinder hole 24 is filled with operating oil.

According to the braking mechanism of FIG. 5, the piston 2
Braking is applied when 5 moves in either the left or right direction, and the bidirectional movement of the arrows A and B of the cutting tool 14 is decelerated.

FIG. 6 is a schematic cross-sectional view showing a damper mechanism for reducing the movement in the arrow B direction from the A direction. The piston 25 in the cylinder hole 24 has a small hole 28.
And a small hole 30 with a check valve 29. This check valve 29 only allows the oil in the right side chamber in FIG. 6 to move to the left side chamber. According to the damper mechanism of FIG. 6, the piston 25 moves more slowly to the left than to the right in the figure. Therefore, the movement in the arrow B direction in FIG. 1 is smaller than the movement in the arrow A direction.

By providing a braking mechanism and a damper mechanism as shown in FIGS. 5 and 6, the vibration of the lever 3 can be damped, and as a result, a wavy cutting depth on the deburring surface of the workpiece. Periodic fluctuations in power are prevented.

[0024]

As described above, according to the deburring device of the present invention, it is possible to deburr by inserting the cutting tool and the roller even in a narrow space. In addition, claim 2,
According to the deburring device of No. 3, the wavy cutting depth on the deburring surface of the work is prevented from varying periodically.

[Brief description of the drawings]

FIG. 1 is a side view of a deburring device according to an embodiment.

FIG. 2 is a perspective view of a main part of the apparatus shown in FIG.

FIG. 3 is an exploded perspective view of main parts of the apparatus of FIG.

FIG. 4 is a perspective view of a main part of the apparatus shown in FIG.

FIG. 5 is a schematic cross-sectional view showing a braking mechanism.

FIG. 6 is a schematic cross-sectional view showing a damper mechanism.

[Explanation of symbols]

 1 Robot Arm 2 Block 3 Lever 4 Shaft 5 Base 9 Pin 14 Bit 16 Guide Roller 22 Spring

Claims (3)

[Claims] 1. A deburring device mounted on the tip of a robot arm that is moved along the periphery of a plastic product as a work, wherein the block is attached to the robot arm, and the middle part in the longitudinal direction is the block. A lever that is swingably attached to the block, the tip side of which protrudes from the block and the rear side of which is along the side surface of the block; It is interposed between the guide roller, the rear end portion of the lever, and the block, and urges the lever in a direction to push back the bite when the bite and the roller are pressed against the work and receive a reaction force. Deburring device for plastic products, comprising: 2. The deburring device for plastic products according to claim 1, further comprising a braking mechanism for applying a braking force to the swing of the lever. 3. The deburring device for plastic products according to claim 1, further comprising a mechanism for slowing the swing of the lever tip.