JPH0592339A - Position control device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To obtain a position control device that can easily obtain positioning accuracy by using a position control swing arm. A position-regulating swing arm 2 is used which is used as a position-regulating portion by pressing one of the swing ends against a workpiece 3. An elastic body 4 for rotating the swing end toward the workpiece 3 is provided on the other end of the swing end. A rotatable locking member 5 is provided which sets a plurality of protrusion lengths up to the tip of the position-regulating swing arm 2 according to the size of the workpiece 3. Rotation support shaft 2 of position regulation swing arm 2
A correction unit is provided which is extended in a direction connecting the rotation support shaft 5A of the locking member 5 with A and has a reciprocating drive unit 9 at one end in the extension direction. The rotation support shaft 2A of the position-regulating swing arm 2 is set by the drive of the drive means 9 together with the locking member 4 in a position corresponding to the amount of change in size of the workpiece 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a position regulating device,
More specifically, it relates to a position switching structure in a workpiece positioning device.

[0002]

2. Description of the Related Art As is well known, there is a structure shown in FIG. 6 as an example of a structure for restricting the position of a part of a workpiece in order to position the workpiece. That is, this structure is intended for, for example, a process of engraving a shaft. Specifically, the structure is brought into contact with and separated from the workpiece B via the support block A1 provided on the guide rod A. It is provided with a position-regulating swing arm C that is slidable in the possible direction. This position-regulating swing arm C is formed in a three-pronged shape and is hung on one of the swing ends. The spring D provided gives the habit of pressing the other end of the swing end against the workpiece B. The position of the position-regulating swing arm C that comes into contact with the workpiece B is regulated by the amount of protrusion of the pair of stoppers E and F arranged to face the other swing end. ing. One of the stoppers, as shown by a chain double-dashed line in FIG. 5, is an initial stage for stopping the position regulating swing arm C which rotates via the biasing force of the spring D when not facing the workpiece B. It is used for posture setting.

A cylinder G for moving the support block A1 in a direction in which the size of the workpiece B changes is connected to the above-mentioned support block A1, and the amount of change in the size of the workpiece B is changed. Accordingly, the support block A1 is moved in the direction in which the size of the workpiece changes, so that one position of the swing end with respect to the workpiece can be changed.

[0004]

However, in the position regulating device having the above-mentioned structure, when the change in the size of the workpiece is extremely small, the position indexing at one of the swing ends is the stroke of the cylinder. Since it is done through adjustment, it depends on the adjustment accuracy on the cylinder side.
There was a problem that accuracy was difficult to obtain.

Moreover, since the support block itself is moved, the structure tends to be exaggerated, and the structure may be complicated.

Further, since the reaction force from the work piece is applied to the position regulating swing arm, in order to suppress the displacement of the support block and maintain the positioning accuracy with respect to the work piece, Considerable rigidity must be set in the support portion including the cylinder, and even from this point, there is a concern that the structure may become large.

Therefore, in view of the problems in the above-mentioned conventional position regulating device, an object of the present invention is to easily obtain the positioning precision in the position regulating swing arm, and to compare the structures for maintaining the precision. It is to obtain a position regulating device having a structure that can be made relatively simple and can prevent the structure from becoming large and complicated by setting high rigidity.

[0008]

In order to achieve this object, the present invention is directed to a position control device having a position control swing arm which is used as a position control portion by pressing one of the swing ends against a workpiece. In one of the swing ends, the elastic body provided on the other of the swing ends opposite to the one of the swing ends for imparting a tendency to rotate the one swing end toward the workpiece, and the position regulation. A rotatable locking member which is arranged so as to face the other swing end of the swing arm and has a plurality of projecting lengths up to the tip thereof set in accordance with the amount of change in the size of the workpiece. Compensation means is provided, which is extended in a direction connecting the rotation support shaft of the position-regulating swing arm and the rotation support shaft of the locking member, and has a drive means that is reciprocally movable in the extension direction at one end of the extension direction. , The rotation support shaft of the position regulation swing arm has the size of the workpiece. The oscillating end is eccentrically displaced by one of the displacement amounts according to the change amount, and the driving means drives the correction means together with the locking member to change the size of the workpiece. It is characterized by being set up in different positions.

[0009]

According to the present invention, the fulcrum position is changed in accordance with the size of the workpiece by the rotation of the rotation support shaft of the position regulating swing arm, so that one position of the swing end can be changed. The size of the locking member facing the other swing end of the position regulating swing arm is also adjusted to the size of the workpiece.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic diagram for explaining the principle of Seiichi Ichiki according to an embodiment of the present invention. A position regulating device 1 according to the present embodiment is a stationary part of a processing device used for processing a workpiece. 1A is provided with a position regulating swing arm 2 which is swingable.

That is, the position regulating rocking arm 2 has a rocking end extending in four directions around a rotation fulcrum, and one of the rocking ends is a work piece, this embodiment. In the case of, the end portion is opposed to and abuts the upper surface of the shaft member 3. Then, a spring 4 that is hooked between the above-mentioned immovable portion is provided at the other end of the swing end that is opposed to the one end with the rotation fulcrum. The habit of pressing the oscillating end against the workpiece is added.

The other swinging end of the swinging end of the position regulating swinging arm 2 is opposed to the locking member 5 rotatably provided in the immovable portion. The locking member 5 is composed of a disk integrated with a support shaft 5A that is rotatably provided on the stationary portion 1A.
In the circumferential direction of this disk, a plurality of locking portions 5B and 5C are provided, in which the amount of protrusion of the position regulating swing arm 2 with respect to the swing end is set in accordance with the amount of change in the size of the workpiece 2. Therefore, the position facing the swinging end of the position regulating swinging arm 2 is selected by the correcting means described later.

The support shaft 2A, which serves as a rotation fulcrum of the above-described position-regulating swing arm 2, is integrated with the arm 2, and its integral part is immovable as shown in FIG. An eccentric diameter portion eccentric to the diameter portion 2A1 supported by the portion 1A by an amount capable of changing the position of one of the swing ends according to the amount of change in the size of the workpiece. 2A2. That is, the eccentric diameter portion 2A2 is centered so that the amount of displacement L in the radial direction of the shaft member, which corresponds to the amount of change in the radius of the shaft member 3 that is the workpiece (the dimension indicated by symbol H in FIG. 1), can be set. When the position is determined and the swing fulcrum of the position regulating swing arm 2 is located below the radial portion 2A1 by the amount indicated by the reference symbol L1, as shown in FIG. 2 (A). Is set when the shaft member 3 has a small diameter, and as shown in FIG. 2 (B), when the swing fulcrum is located above the diameter portion 2A1 by an amount indicated by the reference symbol L1, the shaft member 3 is The case where the member 3 has a large diameter is set, and both positions are set by the same angle in the relative direction of the support shaft 2A about the horizontal axis. Therefore, by changing the position of the rocking fulcrum shown in FIG. 2, one of the rocking ends facing and abutting the shaft member 3 is assumed to have the same biasing force of the spring 4 and the shaft member 3 The contact position will be set according to the difference in radius.

On the other hand, the position regulating rocking arm 2 and the locking member 5 described above are arranged at one of the rocking ends and the position regulating rocking arm.
The facing position of the locking portion with respect to the swinging end of the frame 2 can be switched by the correction means 6 described later. That is, as shown in FIG. 3, the correction means 6 includes the support shaft 2A of the position restricting swing arm 2 and the support shaft 5 of the locking member 5 as described above.
It comprises a connecting lever extended so that it can pivotally attach to the swing ends of swing arms 7 and 8 whose base ends are fixed to A. One end of this extension direction extends along the extension direction. It is connected to an actuator 9A of a cylinder 9 which constitutes a reciprocating drive means. The cylinder 9 is configured so that the protruding position of the actuator 9A can be switched according to the size of the workpiece, in this case, the shaft member 3, and specifically, the shaft member 3 has a small diameter. In this case, the actuator 9A can be pulled into the cylinder 9, and when the shaft member 3 has a large diameter, the actuator 9A can be pushed out of the cylinder 9.

Since this embodiment has the above structure,
As shown in FIG. 4, the position of the rocking end of the one side 8 of the position regulating rocking arm 2 is switched according to the size of the shaft member 3. That is, in FIG. 4, when the shaft member 3 has a large diameter, the connecting lever serving as the correction means 6 moves to the cylinder 9 side, and as shown by the solid line, the position regulating swing arm.
The center position of the eccentric shaft portion 2A2 on the support shaft 2A of the frame 2 is
The position shown in FIG. 2 (A) is switched to the position shown in FIG. 2 (B), and the locking portion of the locking member 5 is also moved to the swing end facing the switching of the central position. Is set so that it can move largely, and as a result, the position regulation swing arm
As compared with the case where one swing end of the shaft 2 has a small diameter of the shaft member 3 shown by the chain double-dashed line, the radius becomes larger (reference numeral S in FIG. 4).
(Quantity indicated by), it is regarded as a displaced posture.

Incidentally, the above-mentioned position-regulating swing arm 2 is
Although the eccentric position of the support shaft 2A is aimed at the state where one swing end can be biased in the vertical direction in FIG. 1, the present invention is not limited to this. For example, from the position of the support shaft 2A at one swing end to the tip. The phase of the eccentric position on the spindle 2A may be set so that the amount of protrusion up to the position is changed according to the size of the workpiece. In this case, for example, as the workpiece, It is possible to press the upper edge portion in correspondence with the change in the thickness of the upper edge portion in the shape processed by.

[0018]

As described above, according to the present invention, the workpiece is positioned by directly swinging the position-regulating swing arm having the swing end that abuts the workpiece. Therefore, since the positioning accuracy can be maintained by the accuracy of the member itself that acts on the work piece, compared to the case where a separate member that acts on the work piece is used as in the conventional case, repeated positioning is performed. It becomes easier to maintain accuracy.

Further, according to the present invention, also in the structure for maintaining the above-mentioned accuracy, it is only necessary to maintain the strength of the position regulating swing arm itself, that is, the support shaft of the swing arm. Therefore, the structure can be relatively simple, and a low-cost position control device can be obtained.

Further, according to the present invention, since the driving means used for the correcting means may have a function of simply switching the position of the support shaft of the position regulating swing arm, it is supported from the workpiece. Since it is not necessary to consider the rigidity related to the reaction force applied to the block, the size can be reduced, and a low-cost device can be obtained in this respect as well.

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining the principle structure of a position regulating device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram for explaining a structure of a support shaft of a position-regulating swing arm used in the principle structure shown in FIG.

FIG. 3 is a schematic diagram for explaining a means for correcting the position of the support shaft in the principle structure shown in FIG.

FIG. 4 is a schematic diagram corresponding to FIG. 1 for explaining the operation of the principle structure shown in FIG.

FIG. 5 is a schematic diagram for explaining an example of a conventional structure of a position regulating device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Position regulating device 1A Immovable part 2 Position regulating swing arm 2A Support shaft 2A1 Diameter part 2A2 Eccentric shaft part 3 Shaft member which is a workpiece 4 Elastic body 5 Locking member 6 Connection lever 9 Compensating means Driving means

Claims (1)

[Claims] 1. A position regulating device comprising a position regulating rocking arm, wherein one of the rocking ends is brought into pressure contact with a workpiece to be used as a position regulating portion, wherein a rocking position located opposite to one of the rocking ends. An elastic body which is provided on the other of the movable ends and which imparts the habit of rotating the one swing end toward the workpiece, and an elastic body facing the other swing end of the position regulating swing arm. A plurality of rotatable locking members that are arranged and have a protruding length up to the tip end according to the amount of change in the size of the workpiece, the rotation support shaft of the position regulating swing arm, and the engagement member. The rotation support shaft of the position-regulating swing arm is provided with a correction means that is extended in a direction connecting the rotation support shaft of the stop member and has a drive means that can reciprocate in the extension direction at one end of the extension direction. The eccentricity is determined by the displacement of one of the swing ends according to the amount of change in the size of the workpiece. The position regulating device is characterized in that, by driving the driving means, the posture according to the amount of change in the size of the workpiece is set together with the locking member via the correcting means.