JPH10218424A - Grip device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable suppressing of fluctuation in clamping force of a plate material by a simple mechanism. SOLUTION: In this device, an adjusting screw 16 mounted to be screwed to a screw hole 7 formed in a crank arm 2 is divided into two of a rear/tip end part side adjusting screw 16a, 16b, therebetween is connected able to contact/separate by a pin 17, a holder 10 holding a fixed grip 3 is brought into contact with a tip end of the tip end part side adjusting screw 16b, a support part 10a of the holder 10 is inserted to a through hole 16c of the adjusting screw 16, by a cam surface 18a of a lever 18 with cam bearing mounted in an end part of the support part 10, a rear end of the rear end part side adjusting screw 16a is pressed, the two-divided both adjusting screws are energized in a direction approaching each other. In this way, the adjusting screw 16, holding pressing the screw in the screw hole 7 of the crank arm 2, is firmly fixed, a space between the fixed grip 3 and a movable grip 4 is fixedly maintained relating to even vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grip device for holding a conveyed plate or the like.

[0002]

2. Description of the Related Art For example, when a plate material is fed into a working machine such as a press machine, a grip device sandwiching the plate material is used. Conventionally, in such a grip device, as shown in FIG. 4, a clamp arm 2 is attached to a base 1, and a fixed grip 3 is attached to a distal end portion of the clamp arm 2. A movable grip 4 is provided so as to face the fixed grip 3, and the movable grip 4 can be moved toward and away from the fixed grip 3 by a drive mechanism (not shown). The plate material 5 is pinched by the approach of the movable grip 4, and released by separation.

The distance between the fixed grip 3 and the movable grip 4 sandwiching the plate 5 is determined by positioning the fixed grip 3 according to the thickness of the plate 5. For this purpose, the fixed grip 3 is moved via the adjusting screw 6 for adjusting its position to the clamp arm 2.
Attached to. That is, a screw hole 7 is formed at the tip of the clamp arm 2, and the adjusting screw 6 is screwed into the screw hole 7 and attached so as to pass through the screw hole 7.

[0004] A through hole 8 having a step 8a at one end of the spring 9 is formed inside the adjusting screw 6 at the center thereof. Reference numeral 10 denotes a holder for attaching the fixed grip 3 with bolts 11 or the like. The holder 10 is brought into contact with the tip of the adjusting screw 6, and its supporting portion 10 a is inserted into the through hole 8 of the adjusting screw 6, and the end of the supporting portion 10 a Is attached to the adjusting screw 6 such that the holder 10 is kept in contact with the tip of the adjusting screw 6 by the elasticity of the spring 9 by contacting the other end of the spring 9 arranged on the step 8a. Have been.

A hole 13 is formed at an appropriate position around the screw hole 7 formed at the tip of the clamp arm 2.
A spring 14 is disposed on the spring 3, and a flange 6 a of the adjusting screw 6 is in contact with a spring receiver 15 provided at one end of the spring 14. The adjusting screw 6 is urged in a direction to come out of the screw hole 7 by the elastic force of the spring 14, whereby the screw hole 7 is released.
The position error due to backlash between the screw of the adjusting screw 6 and the screw of the adjusting screw 6 is eliminated.

[0006]

However, in the correction for the backlash caused by the action of the spring 14, the adjustment screw 6 is rotated by the vibration to come to the distance between the fixed grip 3 and the movable grip 4 which sandwich the plate member 5. Occurs, and the holding force of the plate member 5 is weakened. As a result, there is a problem that the interval between the fixed grip 3 and the movable grip 4 must be adjusted by frequently operating the adjusting screw 6, which is troublesome.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has as its object to provide a grip device capable of suppressing a change in pinching force of a plate material with a simple mechanism.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clamp arm, an adjusting screw screwedly attached to the clamp arm, and an abutting end of the adjusting screw, and maintaining the contact in a maintenance direction. A holder that is tightened and fixed to the adjusting screw, a fixing grip that is fixed to the holder,
In a grip device, comprising a movable grip that is disposed to face the fixed grip, and moves toward and away from the fixed grip, the adjustment screw is divided into two, and the divided two adjustment screws are This is achieved by a grip device characterized by being urged in directions approaching each other by tightening.

[0009] It is another object of the present invention to provide a method for adjusting the position of a clamp arm through a clamp arm, an adjusting screw threadedly attached to the clamp arm, and a spring that abuts against and maintains the tip of the adjusting screw. A grip device, comprising: a holder fixed to a screw, a fixed grip attached to the holder, and a movable grip that is disposed to face the fixed grip, approaches the fixed grip, and moves away from the fixed grip. The adjusting screw is divided into two parts, and a lever having a cam surface abutting on the spring and being pivotally mounted on the holder is provided. By operating the lever, the two adjusting screws are moved toward each other by the spring. This is achieved by providing a grip device characterized by being biased by the above.

According to a feature of the present invention, the adjusting screw is divided into two parts, and the two adjusting screws are urged in a direction approaching each other by tightening. The screw of the clamp arm is pressed by the screw of (1), and the adjusting screw is firmly fixed to the clamp arm. Therefore, the rotation of the adjusting screw is prevented by the vibration, and the distance between the fixed grip and the movable grip is maintained at the adjusted distance.

If the tightening is performed by operating a lever having one end formed on the cam surface, the tightening force can be obtained by an easy operation without requiring an extra tool for tightening.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are sectional views of a grip device according to an embodiment of the present invention. Parts common to the grip device shown in FIG. 4 are denoted by the same reference numerals.

In the embodiment shown in FIG. 1, an adjusting screw 16 is screwed into a screw hole 7 formed at the tip of the clamp arm 2 mounted on the base 1.
The adjusting screw 16 has a through hole 16c formed at the center thereof, and a front end adjusting screw 16b and a rear end adjusting screw 16a are formed.
Is divided into two. And the tip side adjustment screw 16
b and the rear end side adjusting screw 16a are connected so as to be able to freely contact and separate by a pin 17, and when one of the front end side adjusting screw 16b and the rear end side adjusting screw 16a is rotated by the connection by the pin 17, Both are configured to rotate.

In the through hole 16c at the center of the adjusting screw 16,
The support portion 10a of the holder 10 that holds the fixed grip 3 abutting on the distal end of the distal-end-side adjustment screw 16b is inserted. A lever 18 having a cam surface 18a formed at the end is rotatably mounted on a shaft 19 at an end of the support 10a of the holder 10.

The cam surface 18a comes into contact with a stopper 20 which comes into contact with a disc spring 21 disposed around the end of the through hole 16c, and the lever 18 is turned sideways (as shown) to rotate the lever 18 to the rear end side. The adjusting screw 16a is connected to the tip side adjusting screw 16
b, and the abutment of the holder 10 causes the distal-end-side adjusting screw 16b to push toward the rear-end-side adjusting screw 16a. That is, the tip-side adjustment screw 16b and the rear-end adjustment screw 16a are urged and tightened in a direction approaching each other when the lever 18 is turned over.

With this tightening, the screw of the adjusting screw 16 presses the screw of the screw hole 7 of the clamp arm 2, and the adjusting screw 16 is firmly fixed to the clamp arm.
The rotation of the adjusting screw 16 is prevented by the vibration, and the distance between the fixed grip 3 and the movable grip 4 is maintained at the adjusted distance. When adjusting the distance between the fixed grip 3 and the movable grip 4, the tightening by the upright cam surface 18a is released by rotating the lever 18, and the adjusting screw 16 is rotated. By releasing the tightening, the turning operation of the adjusting screw 16 can be easily performed.

In the embodiment shown in FIG.
A screw is formed at the end of the support portion 10a, and a nut 22 is screwed into the screw, and a tip side adjustment screw 1 is screwed through a washer 23.
6b and the rear end side adjustment screw 16a are tightened in a direction approaching each other. Even with such a configuration, the screw of the adjusting screw 16 presses the screw of the screw hole 7 of the clamp arm 2, and the adjusting screw 16 is firmly fixed to the clamp arm. When adjusting the distance between the fixed grip 3 and the movable grip 4, the nut 22 is rotated to loosen the tightening, and the adjusting screw 16 is rotated to rotate the fixed grip 3 and the movable grip 4.
Adjust the spacing of Also in this case, the turning operation of the adjusting screw 16 can be easily performed.

In the embodiment shown in FIG.
A screw hole is formed at the end of the support portion 10a, and a bolt 24 is screwed into the screw hole, and the front end adjustment screw 16b and the rear end adjustment screw 16a are tightened via the washer 23 in a direction approaching each other. Like that. Even with such a configuration, the screw of the adjusting screw 16 is screwed into the screw hole 7 of the clamp arm 2.
Adjustment screw 16 is firmly fixed to the clamp arm. When adjusting the distance between the fixed grip 3 and the movable grip 4, the bolt 24 is turned to loosen the tightening, and the adjusting screw 16 is turned to adjust the distance between the fixed grip 3 and the movable grip 4. Also in this case, the turning operation of the adjusting screw 16 can be easily performed.

[0019]

As described in detail above, according to the present invention,
Since the rotation of the adjustment screw due to vibration is prevented, the change in the holding force of the plate material is small, and thus the frequency of adjustment due to the change in the holding force of the plate material can be reduced. Further, although the adjustment screw is firmly positioned and fixed to the clamp arm, the adjustment screw can be easily operated when adjusting the distance between the fixed grip and the movable grip.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment according to the present invention.

FIG. 2 is a cross-sectional view of another embodiment according to the present invention.

FIG. 3 is a cross-sectional view of still another embodiment according to the present invention.

FIG. 4 is a sectional view of a conventional grip device.

[Explanation of symbols]

 Reference Signs List 1 base 2 clamp arm 3 fixed grip 4 movable grip 5 plate 7 screw hole 10 holder 10a holder support 11 bolt 16 adjustment screw 16a rear end adjustment screw 16b front end adjustment screw 16c through hole 17 pin 18 lever 18a Cam surface 19 Shaft 20 Stopper 21 Disc spring 22 Nut 23 Washer 24 Bolt

Claims (2)

[Claims] 1. A clamp arm, an adjustment screw threadedly attached to the clamp arm, and a holder that abuts against a tip of the adjustment screw and tightens the contact in a maintenance direction to be fixed to the adjustment screw. And a fixed grip fixed to the holder, and a movable grip disposed opposite to the fixed grip and movable toward and away from the fixed grip, wherein the adjusting screw is divided into two parts. A grip device, wherein both of the adjusting screws formed and divided are urged in directions approaching each other by the tightening. 2. A clamp arm, an adjustment screw threadedly attached to the clamp arm, and a holder fixed to the adjustment screw via a spring that abuts on the tip of the adjustment screw and maintains the abutment. And a fixed grip attached to the holder, and a movable grip disposed opposite to the fixed grip to move toward and away from the fixed grip, wherein the adjusting screw is divided into two. And a lever having a cam surface in contact with the spring and axially attached to the holder,
The grip device, wherein the two divided adjustment screws are urged in a direction approaching each other by the spring by operating the lever.