JPH09315543A - Driving unit for feed arm in feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain miniaturization and weight reduction by fixing a driving pulley for a feed part to the tip of a driving arm while fixing a driven pulley for a feed arm to the other end of a feed arm shaft, and winding a timing belt in endless annular shape around the driving pulley for the feed part and a driven pulley for the feed part. SOLUTION: A feed arm 2 is rotatably journalled to a driving arm 1 and regulated in its angle by a driving pulley 14 for the feed arm 2. A feed part 3 is rotatably journalled to the feed arm 2 and regulated in its angle by a driving pulley 9 for the feed part 3. In association with the rotation of the driving arm 1, timing belts 15, 17 are respectively rotated, and a driven pulley 13 for the feed arm 2 and a driven pulley 16 for the feed part 3 are rotated, so that the feed arm 2 is rotated in the direction of the driving arm 1, and the feed part 3 is rotated in an opposite direction to the driving arm 1. The feed part 3 is horizontally moved in a lateral direction while maintaining a horizontal position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a feed arm driving device for a feeder for moving a feed portion of a feed arm in a horizontal direction.

[0002]

2. Description of the Related Art As a drive device of a feed arm in a feeder, there is a device utilizing a Scott Russell motion mechanism as disclosed in Japanese Patent Application Laid-Open No. Hei 7-187344, for example. Then, the tip of the drive arm is connected to the intermediate point of the feed arm by a shaft pin, and the upper end serving as the non-feed portion of the feed arm
The drive arm is configured so as to move up and down on a vertical line of a pivot axis.

Since the distance between the pivot of the drive arm and the intermediate connecting shaft of the feed arm and the distance between the upper end and the lower end of the feed arm divided by the connecting shaft of the feed arm are all designed to be equal. When the drive arm is rotated by the operation of the drive motor, the feed section moves in the horizontal direction. Therefore, if an attachment such as a chuck or a suction tool is provided in the feed section, the supply target such as the supply material can be laterally conveyed and supplied.

That is, the pivot axis of the drive arm for rotating the feed arm is located at the same height as the feed portion that moves horizontally and at the center of the movement track, and the weight of the feed arm and the supplied object is determined by the weight of the drive arm. It is mainly supported by the pivot. Therefore, in order to secure a sufficient supporting force, the lower part of the main body of the pivot portion and the drive arm are inevitably strong, and their existence is inevitable.

Further, in order to always move the feed section in a horizontal state, each arm is composed of a link mechanism.

[0006]

SUMMARY OF THE INVENTION The present invention provides a feed arm for a feeder in a feeder which reduces the number of constituent members and makes it possible to reduce the size and weight of the drive motor, and reduces the load on the drive motor, as compared with the above-mentioned conventional structure. A drive device is not provided.

[0007]

SUMMARY OF THE INVENTION According to the present invention, at the same time as connecting a base portion to a drive rotating shaft, a drive pulley for a feed portion is fixedly attached to a tip end portion of a drive arm which is rotatably supported by a machine body. In addition, a through-bearing part in the front-rear direction was formed including the drive pulley for the feed part attached to the tip part, and the feed arm was rotatably mounted on the feed part shaft at the lower end so as to be rotatable in the left-right direction. A feed arm shaft integrally projectingly provided on the upper end of the feed arm shaft, the feed arm shaft is inserted through the penetrating bearing portion, and a feed arm driven pulley is fixedly attached to the protruding front end;
The driven pulley for the feed arm and the drive pulley for the feed arm fixedly mounted on the machine body coaxially with the drive rotation shaft of the drive arm are wound endlessly with a timing belt, and the drive portion drive pulley and It is characterized in that a driven pulley for a feed portion rotatably attached to the feed portion shaft integrally with the feed portion is wound in an endless annular shape by a timing belt.

Further, the timing belt is a toothed timing belt, and the winding surface of each pulley has teeth meshing with the toothed timing belt, or each pulley is a chain sprocket, and the timing belt is a chain. May be used. Furthermore, the drive pulley for the feed arm is rotatably mounted on the machine body, and the tilt gear is integrally polymerized, and the drive gear that meshes with the tilt gear is connected to the servo motor fixed to the machine body. Good.

When the drive arm rotates about the drive rotation shaft of the base as a fulcrum, the feed arm is driven along with the feed arm shaft inserted through the tip. At this time, since the timing belt wound around the drive arm drive pulley fixed to the machine body rotates to rotate the feed arm driven pulley of the rotatable feed arm shaft, the feed arm moves in the rotation direction side of the drive arm. It rotates about the feed arm axis.

Further, due to the relationship between the drive pulley for the feed portion fixed to the tip of the drive arm and the driven pulley for the feed portion mounted on the rotatable feed portion shaft wound by the timing belt, similar movement occurs, and the feed is performed. The part rotates in the direction opposite to the direction of rotation of the drive arm.

Therefore, by setting the diameter or the gear ratio of the timing belt and the pulley to be wound, the feed portion of the feed arm can be moved in the horizontal direction while being corrected to the horizontal position.

Further, the tilting gear is rotated by the driving gear connected to the servo motor fixed to the main body of the feed arm by integrally superimposing the tilting gear on the driving arm driving pulley, so that the feeding arm is independent of the driving arm. By only performing the tilting action of rotating only the drive arm, and by normally stopping and fixing the drive arm drive pulley by the servomotor, there is no hindrance to the normal movement of the feed portion by the drive arm.

[0013]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a central longitudinal sectional view of FIG. 1. An arm that horizontally moves a feed unit 3 is a drive arm 1 and a feed arm 2. It consists of.

The drive arm 1 rotatably supports a base end portion of the machine body 4, and at the same time, rotates via a speed reducer 6 using a feed motor 5 as a driving source, and a front end portion thereof is provided with a through hole 7 in the front-rear direction. A bearing portion 8 is formed, and a feed portion drive pulley 9 is integrally fixedly attached to the front surface side of the bearing portion 8, and the central portion of the feed portion drive pulley 9 has a through hole 1
The bearing portion 8 is formed together with the through hole 7.

The feed arm 2 rotatably supports the feed part 3 in the left-right direction on a feed part shaft 11 provided at the lower end in the front-rear direction, and at the upper end part, the feed arm shaft 12 extends rearward.
Is fixed and projected, and is rotatably inserted into the bearing portion 8 of the drive arm 1 so that its tip is projected, and the driven arm driven pulley 13 is mounted and fixed to the protruding end.

A feed arm drive pulley 14 concentric with the drive rotation shaft of the drive arm 1 and fixed to the machine body 4 is provided opposite the feed arm driven pulley 13, and a timing belt is provided between the two pulleys. 15 is wound endlessly. Further, a driven pulley 16 for the feed portion is provided on the feed portion shaft 11 of the feed portion 3 so as to be rotatable with the feed portion 3 so as to face the drive pulley 9 for the feed portion fixed to the drive arm 1, and a timing belt is provided between both pulleys. 17 is wound endlessly.

Therefore, the feed arm 2 is rotatably supported by the drive arm 1, and its angle is regulated by the feed arm drive pulley 14 linked with the timing belt 15, and the feed portion 3 is fed. 2, the angle is regulated by the feed portion drive pulley 9 that is rotatably supported and is linked by the timing belt 17.

Then, as the drive arm 1 rotates, the feed arm drive pulley 14 and the feed section drive pulley 9 rotate the timing belts 15 and 17, respectively, and the feed arm driven pulley 13 and the feed section Since the driven pulley 16 rotates, the feed arm 2 rotates in the direction of the drive arm 1 and the feed portion 3 rotates in the direction opposite to the drive arm 1, so that the feed portion 3 horizontally moves in the horizontal direction while maintaining the horizontal position. To do.

The rotation angle of the feed arm 2 and the feed portion 3 can be controlled by setting the diameter ratio of each pulley wound around the timing belt, and each pulley and each timing belt are toothed to transmit the rotation. It is also possible to use the chain sprocket and the chain reliably, and the horizontal movement can be controlled by setting the gear ratio.

FIG. 3 is a sectional view of an essential part showing an embodiment in which a tilt mechanism is provided. The feed arm drive pulley 14 is rotatably supported by the machine main body 18 and the feed arm drive pulley 14 is rotatably supported. The tilting gear 19 is integrally formed on the main body 4, and the tilting gear 19 meshes with a drive gear 20 rotatably attached to the machine body 4. The drive gear 20 is a servomotor installed in the machine body. 21 is used as a driving source to rotate.

Therefore, the rotation of the feed arm drive pulley 14 is restricted by the servo motor 21,
Timing belt 1 driven by servo motor 21
5 can be rotated independently of the drive arm 1 to perform a tilting action of rotating the feed arm 2 and the feed portion 3, and the servomotor 21 locks the feed arm drive pulley 14 immovably. It is possible to select to horizontally move the feed unit 3 as the drive arm 1 rotates.

[0022]

As described above, according to the present invention, the structure is remarkably simplified as compared with the conventional drive device for the feed arm, and accordingly, the size and the weight are reduced, and the load on the drive motor can be reduced. It has a remarkable effect.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the center when the feed arm in FIG. 1 is located at the center.

FIG. 3 is a vertical cross-sectional side view of essential parts showing an embodiment in which a tilt mechanism is attached.

[Explanation of symbols]

 1 Drive Arm 2 Feed Arm 3 Feed Part 4 Machine Body 5 Feed Motor 6 Reduction Gear 7 Through Hole 8 Bearing Part 9 Feed Part Drive Pulley 10 Through Hole 11 Feed Part Shaft 12 Feed Arm Shaft 13 Feed Arm Driven Pulley 14 Feed Arm Drive pulley 15 Timing belt 17 Timing belt 16 Driven pulley for feed section 18 Shaft support 19 Tilt gear 20 Drive gear 21 Servo motor

Claims (4)

[Claims] 1. At the same time as connecting the base to the drive shaft,
At the tip of the drive arm that is rotatably supported on the machine body,
While fixing and mounting the drive pulley for the feed part,
A through bearing in the front-rear direction was formed including the drive pulley for the feed part attached to this tip part, and the upper end part of the feed arm in which the feed part was rotatably mounted on the feed part shaft so that it could rotate in the left-right direction at the lower end part. The feed arm shaft is integrally provided with the feed arm shaft, the feed arm shaft is inserted into the penetrating bearing portion, and the feed arm driven pulley is fixedly attached to the protruding front end. The drive pulley for the feed arm, which is fixedly mounted on the machine body concentrically with the drive rotation shaft of the drive arm, is wound endlessly with a timing belt, and the feed pulley for the feed section and the feed section are integrally formed. A driven pulley for a feed portion rotatably attached to a shaft is wound endlessly with a timing belt in a feeder. Doamu of the drive unit. 2. The feed arm driving device according to claim 1, wherein the timing belt is a toothed timing belt, and a winding surface of each pulley has teeth that mesh with the toothed timing belt. . 3. Each pulley is a chain sprocket.
2. The feed arm driving device according to claim 1, wherein the timing belt is a chain. 4. A feed arm drive pulley is rotatably mounted on a machine body, and a tilt gear is integrally polymerized, and a drive gear meshing with the tilt gear is connected to a servo motor fixed to the machine body. The drive device for the feed arm in the feeder according to claim 1, 2 or 3, characterized in that.