JPH09119498A - Driving device for feed arm in feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving device for the feed arm of a non-Scott Russell motion mechanism in which a main body may not suspended to the moving surface of a feed part, and the pivotal shaft of a driving arm may not exist in the center part of the moving surface. SOLUTION: A driving rod 7 is fixed to a driving shaft which is supported by a main body and rotated in normal and reverse directions, and a slider arranged in the intermediate part of a feed arm 1 is slidably fitted to a rail arranged in the longitudinal direction of the driving rod 7. A crank rod 5 which his positioned just above the driving shaft of the driving rod 7 and fixed to a crankshaft which is supported by the main body and rotated in normal and reverse directions, and the base end 2 of a feed arm 1, are connected to each other so that the base end connecting part of the feed arm 1 draws conchoidal curve so as to approximately linearly move an end feed part 3.

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 part, the supply target such as the supply material can be conveyed and supplied in the lateral direction.

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.

[0005]

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a non-Scott-Russell motion mechanism in which the main body does not hang down to the moving surface of the feed portion, and the pivot portion of the drive arm does not exist in the central portion of the moving surface. It is intended to provide a drive device for the feed arm.

[0006]

According to the present invention, a drive rod is fixedly attached to a drive shaft which is supported by a main body and rotates in a forward and reverse directions, and a rail provided in the longitudinal direction of the drive rod is provided at an intermediate portion of a feed arm. A base end portion of a feed rod and a crank rod fixed to a crank shaft, which is slidably fitted to a provided slider and is directly above the drive shaft of the drive rod and which is supported by the main body and rotates in forward and reverse directions. And the proximal end connecting portion of the feed arm is characterized by drawing a conchoid curve so that the distal end feeding portion makes an approximate linear motion.

The feed arm rotates in accordance with the forward and reverse rotation of the drive rod, and the slider acts by the forward and reverse rotation of the crank rod to move up and down. Therefore, the tip feed portion of the feed arm performs an approximate linear motion, The supply target can be transported and supplied in the lateral direction.

Therefore, the feed arm and the drive rod are integrally superposed and rotated, and the support of the feed arm is suspended by the crank rod at the upper base end, so that the lower end of the main body and the feed part are supported. A space is created between the moving surface and the moving surface.

[0009]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 and FIG. 2 are front views at the starting point position and the ending point position of the moving range of the feed arm,
FIG. 3 is a configuration diagram showing a side view.

The feed arm 1 has a base end portion 2 rotatably connected to a tip end portion 5A of a crank rod 5 by a shaft pin 6. Further, sliders 4A and 4B are provided at the intermediate portion on the back surface of the feed arm 1 and slidably fitted to a rail 8 formed in the length direction of the drive rod 7.

The guide rail 8 has a concave groove on its side surface.
Lower portions on both sides of the sliders 4A and 4B are fitted in the groove, and a bearing is interposed in the fitting portion to enable smooth sliding, and the feed arm 1 is in a state of being overlapped with the front and rear of the drive rod 7. ing.

The drive rod 7 has an upper end portion at the feeder main body 1.
A feed arm having a slider 4A, 4B pivotably attached to the lower end of the drive shaft 1, the drive shaft 9 of which rotates forward and backward by a servomotor 10 and thus slidably fitted on a rail 8 of a drive rod 7. 1 also rotates integrally.

On the other hand, the crankshaft 12 of the crank rod 5
Is located directly above the drive shaft 9, and the feeder main body 11
Further, the crankshaft 12 and the drive shaft 9 are provided with timing pulleys 13 and 14, respectively, which are fixed to each other so as to be able to rotate in the forward and reverse directions, and are linked with each other by a timing belt 15 that is suspended.

Therefore, the crank rod 5 of the crank shaft 12, which is rotated by the forward and reverse rotations of the drive shaft 9 driven by the servo motor 10 via the timing pulley 13 and the timing belt 15, is connected to the feed arm 1. The feed arm 1 is rotated by the drive rod 7 in the left-right direction, and at the same time, is moved up and down by the crank rod 5.

Therefore, the length of the crank rod 5 and the diameters of the timing pulleys 13 and 14 are matched and set so that the leading end feed portion 3 of the feed arm 1 moves in the left-right direction while drawing an approximate straight line. The connecting portion between the base portion of and the crank rod 5 draws a conchoid curve. In the figure, 16 is an auxiliary feed arm that moves in parallel by a link mechanism, and 17 is an auxiliary crank rod.

[0016]

As described above, since the present invention does not utilize the Scott Russell motion mechanism, the drive arm does not exist in the central portion where the feed arm moves, and the feed arm rotates in a state of overlapping with the feed arm. Is. Therefore, there is no obstacle in the moving space of the feed arm, the space can be used, and the feeder main body is short and compact.

Furthermore, since the left and right and up and down movements of the feed arm are performed by utilizing the rotational force, the movement becomes smooth,
Since both rotary motions are used as they are, it is possible to use a common power source, further promoting efficiency and compactness of the device.

[Brief description of the drawings]

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

FIG. 2 is a front view showing a point moved from the state of FIG.

FIG. 3 is a side view of a main part of FIG. 1;

[Explanation of symbols]

 1 Feed Arm 2 Base End Part 3 Feed Part 4A Slider 4B Slurry 7 Cider Rod 5 Crank Rod 6 Axis Pin 7 Drive Rod 8 Rail 9 Drive Axis 10 Servo Motor 11 Feeder Body 12 Crank Axis 13 Timing Pulley 14 Timing Pulley 15 Timing Belt

Claims (1)

[Claims] 1. A drive rod is fixedly attached to a drive shaft which is supported by a main body and rotates in a forward and reverse directions, and a slider provided in an intermediate portion of a feed arm is slidable on a rail provided in the lengthwise direction of the drive rod. The base end of the feed arm is connected to the crank rod fixed to the crank shaft which is fitted on the one hand and is located right above the drive shaft of the drive rod and which is supported by the main body and which rotates in the forward and reverse directions. A drive device for a feed arm in a feeder, wherein the end connecting part draws a conchoid curve so that the front end feeding part makes an approximate linear motion.