JPH10179794A - Gripper for strengthening grasping power - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gripper for strengthening grasping power with excellent usability and safety. SOLUTION: This gripper 1 for strengthening the grasping power is constituted of a pair of bases 2 and 3 for grip part formation, freely extensible and contractible cylinder devices 4 and 5 interposed so as to connect both bases 2 and 3, an air damper 6 for generating a pressure against power for operating both bases 2 and 3 from separate initial positions to the direction of bringing them closer, and return springs 7 and 8 for base restoration for restoring both bases 2 and 3 to the initial positions. Thus, a large pressure is made to act only at the time of imparting the grasping power, the bases 2 and 3 to be grip parts are not rapidly opened at the time of relaxing the grasping power, an impact is not applied to a grasping hand, a using feeling is improved and the safety is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a gripper used to enhance grip strength.

[0002]

2. Description of the Related Art Conventionally, grip strength is used.
As a so-called grip-enhancing gripper, a gripper utilizing the elastic force of a torsion coil spring (hereinafter, spring) is generally well known.

[0003] More specifically, both ends of a spring are elongated, and grips are attached to the two ends of the extension. The grips are used in such a manner that both grips are gripped by hand and approached to each other. At this time, an operation of applying a grip force against the spring force of the spring and loosening the grip force is repeatedly performed, and the grip force can be strengthened by this operation.

[0004]

However, in the conventional gripping strength gripper as described above, the spring is resilient due to the configuration in which the pressure against the gripping force is obtained by utilizing the resilient force of the spring. When the grip force is reduced after the grip force is applied against the force, the grip portion is rapidly opened by the resilience of the spring, so that a shock is applied to the gripping hand.

That is, in the conventional gripper, pressure is applied both when the grip force is applied and when the grip force is released, so that the above-described impact is generated. In particular, in the gripper in which the resilience of the spring is further enhanced, there is a problem that the impact is stronger, the usability is poor, and the safety is poor. Further, the conventional one cannot adjust the resilience of the spring, and it is necessary to prepare a plurality of grippers according to the grip strength of the user.

The present invention has been made to solve the above-mentioned problems, and is a gripper for enhancing grip strength.
By using the pressure of the air damper, it is possible to obtain the force against the grip force, and to obtain the restoring force with the weak elastic force of the returning elastic body, thereby improving the usability and safety. It is an object of the present invention to provide a gripper for enhancing grip strength, which enhances grip. It is another object of the present invention to provide a gripping force-enhancing gripper capable of adjusting a force against gripping force.

[0007]

In order to achieve the above-mentioned object, a grip-strengthening gripper according to the present invention is provided with a pair of grip-forming bases, which are disposed parallel to each other at a predetermined interval. At least one pair of connecting means interposed between the bases so as to connect the two bases, and the two bases are freely expandable and contractable in a direction in which the two bases approach and separate from each other; An air damper that generates pressure that opposes the force acting in the direction
And an elastic body for returning the bases to the initial position by generating an elastic force in a direction in which the two bases are separated from each other. .

It is preferable that the base is formed in a substantially rectangular shape and a substantially dish shape with a concave inside. Further, the connecting means may be constituted by a cylinder device including a cylindrical cylinder body, a piston slidably disposed in the cylinder body, and a piston rod. Further, the cylinder device may be provided with a stroke adjusting means for adjusting the operation stroke of both bases.

The air damper has an orifice in the cylinder body communicating with an air chamber separated by a piston in the cylinder body, and an orifice for adjusting the pressure by adjusting an opening area of the orifice. It is preferable to provide a configuration including an adjusting unit. Further, the elastic body may be constituted by a spring.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail based on embodiments shown in the drawings. FIG. 1 is a front sectional view of a gripper for enhancing grip strength according to an embodiment of the present invention, and FIGS. 2 and 3 are a top view and a bottom view thereof.

In these figures, the gripping force enhancing gripper 1 includes a pair of bases 2 and 3 for forming a grip portion, a pair of cylinder devices 4 and 5 as a pair of connecting means, an air damper 6, and an elastic body. And a pair of return springs 7 and 8.

The bases 2 and 3 are opposed to each other and arranged in parallel at a predetermined interval. Each of the bases 2 and 3 is formed of a plate-shaped member having a substantially rectangular shape and a substantially dish-shaped concave inside, and a cylindrical portion 2 </ b> A protruding inward at a longitudinally intermediate portion of one of the bases 2. Are formed, and the cylindrical portion 2A
The outer end is opened, the inner end is closed, and an insertion hole 2a through which a piston rod to be described later is inserted is formed in the closed end.

Circular recesses are formed on the inner wall surfaces of both ends of the one base 2 with the cylindrical portion 2A therebetween in the longitudinal direction, and each recess is a deep small-diameter recess 2B. And a shallow large-diameter recess 2C. In the wall portion of the base 2 corresponding to the concave portion, an insertion hole 2b for a flat head screw described later is formed.

A convex portion 3A projecting inward in a circular shape is formed on the inner wall surface of the intermediate portion in the longitudinal direction of the other base 3, and a circular concave portion 3B is formed on a central outer wall surface at a position corresponding to the convex portion 3A.
Are formed. A wall of the base 3 corresponding to the recess 3B has a cylinder body 6 of an air damper 6 described later.
A mounting hole 3a into which a stud portion 6F as a fixing portion of A is inserted and mounted is formed.

[0015] The base 2 is provided on inner wall surfaces at both ends of the other base 3 with the recess 3B in the longitudinal direction interposed therebetween.
In the same manner as described above, circular concave portions are formed, each of which is formed of a deep small concave portion 3C and a shallow large diameter concave portion 3D.
Is formed with a flathead screw insertion hole 3b to be described later.

The cylinder devices 4 and 5 have both bases 2 and
The two bases 2 and 3 are interposed between the bases 3 and 3 so that the bases 2 and 3 can freely expand and contract in a direction in which the bases 2 and 3 approach and separate from each other. And a piston rod 11 provided with a piston 10 which is freely slidably disposed.

The cylinder body 9 has a cylindrical portion 9A as shown in FIG. 4 and a cylindrical stopper cap 9 as shown in FIG. 5 which is fixedly mounted on the open end of the cylindrical portion 9A.
B. On the outer peripheral surface of one end of the cylindrical portion 9A,
A male screw portion 9a is formed, and a screw hole 9b is formed at the other end. A piston rod insertion hole 9c is formed in one end wall of the stopper cap 9B, and a female thread 9d to be connected to the male thread 9a of the cylinder 9A is formed on the inner peripheral surface.

The piston rod 11 comprises a first inside rod 11A and a second inside rod 11B as shown in FIG. The first inside rod 11A includes a large diameter portion 11a and a small diameter portion 11b, and a screw hole 11c is formed in an end face of the large diameter portion 11a. Also, the outer thread 11 is provided on the outer peripheral surface of the small diameter portion 11b.
d is formed. The second inside rod 11B is made of a fluorinated resin (for example, trade name Teflon), is made up of a piston 10 and a small-diameter rod part 11e, and has a screw hole 11f in the center. Then, on the outer peripheral surface of the small diameter portion 11b of the first inside rod 11A,
The second inside rod 11B is screw-fitted, and the two are connected.

The closed ends of the cylinder bodies 9 of the cylinder devices 4 and 5 are inserted and arranged in the recesses 3C of the base 3, and the screw holes 9b at the ends are inserted from the outer end of the base 3 into the insertion holes 3 and 3.
It is fixedly attached to the base 3 by screwing the countersunk screw 12 inserted through b.

The end of the first inside rod 11A of the piston rod 11 is inserted and arranged in the recess 2B of the base 2, and the screw hole 11c of the end is inserted into the insertion hole 2b from the outer end of the base 2. It is fixedly attached to the base 2 by screwing the flat head screw 13.

The cylinder devices 4 and 5 are provided with stroke adjusting means for adjusting the operation stroke of the bases 2 and 3. That is, in the cylinder devices 4 and 5, the stroke is determined by the position of the piston 10, and the position of the piston 10 is adjusted, that is, the first inside rod 11B of the second inside rod 11B provided with the piston 10 is moved.
The stroke amount can be adjusted by adjusting the screw fitting position with respect to the inside rod 11A.

The air damper 6 has two bases 2, 3
It is configured to generate a pressure that is interposed between the two bases 2 and 3 and acts against the force to move the bases 2 and 3 away from the initial position. As shown in FIG. 7, a cylindrical cylinder body 6A is provided.
A piston 6B slidably disposed in the cylinder body 6A, a piston rod 6C, a piston 6B
Air chamber 6D separated within the cylinder body 6A by the
And an orifice 6E communicating with the air chamber 6D; and pressure adjusting means for adjusting the pressure by adjusting the opening area of the orifice 6E.

The cylinder body 6A is made of Pyrex glass, and is composed of a tubular member having one end closed, and a threaded portion 6a on the outer peripheral surface at the center of the outer surface of the closed end of the cylindrical member. A stud portion 6 </ b> F provided with a stud is provided.

The orifice 6E communicating with the air chamber is formed at the center of the stud 6F. The stud 6F has an adjusting screw 1 as the pressure adjusting means.
4 is screw-fitted. A knob 14a for adjustment is provided on the head of the adjusting screw 14.

The piston 6B is made of carbon graphite, and is configured to generate a pressure against a force for operating the bases 2 and 3 in a direction approaching from an initial position where the bases 2 and 3 are separated from each other. Pressure is generated only when advancing.

That is, the piston 6B is formed with a through-hole 6d communicating between the upstream and the downstream thereof. When the piston 6B advances in the cylinder body 6A, the air flows through the through-hole 6d of the air chamber 6D. A one-way valve 6e is provided to prevent the piston 6B from flowing back through the through hole 6d when the piston 6B returns within the cylinder body 6A.

The piston rod 6C is made of a fluorinated resin, and its tip is rotatably connected to the rear end of the piston 6B via a ball joint 6b. The same pressure value can be maintained even when a side load is applied.
A male thread 6c is formed on the outer peripheral surface of the rear end of the piston rod 6C.

The cylinder body 6A of the air damper 6 is
The closed end is brought into contact with the convex portion 3A of the inner end surface of the base 3, the stud 6F is inserted into the mounting hole 3a, and the nut 15 is fixed to the base 3 by screwing the nut 15 to the outer peripheral surface of the stud 6F. Be attached.

The cylinder body 6A of the air damper 6
In the mounting state, the tip of the stud portion 6F, the nut 15, and the adjusting screw 14 are positioned inside the concave portion 3B of the base 3.

In this case, the concave portion 3B of the base 3 has
The adjuster cap 16 shown in FIG. 3 is fitted to cover the tip of the stud 6F inside the recess 3B, the nut 15, and the adjustment screw 14. The adjuster cap 16 has a handle portion 16A for operation.
Is provided. On the other hand, the piston rod 6 </ b> C has an end opposite to the piston 6 </ b> B inserted into the insertion hole 2 a of the base 2, and is fixedly attached to the base 2 by two nuts 17 and 18.

The return springs 7 and 8 are interposed between the bases 2 and 3 and generate a weak resilient force in a direction in which the bases 2 and 3 are separated from each other to move the bases 2 and 3 to the initial position. And one end thereof is inserted and arranged in the concave portion 2C of one base 2 and the other end is inserted and arranged in the concave portion 3D of the other base 3. Intervened.

Next, a description will be given of a method of using the gripper 1 for enhancing grip strength having such a configuration and an operation thereof. An operation of holding the gripper 1 with one hand, holding the bases 2 and 3 and applying a gripping force in a direction approaching each other, and relaxing the gripping force is repeatedly performed.

In this case, when a force is applied in a direction in which the two bases 2 and 3 approach each other, the pistons 1 of the cylinder devices 4 and 5
0 and the cylinder body 9 slide with each other. In particular,
The piston 10 slides while being guided in the cylinder body 9.

On the other hand, in the air damper 6, when a force is applied in a direction in which the two bases 2 and 3 approach each other, the piston 6B is pressed, and the piston 6B moves in the cylinder body 6A and moves in the air chamber 6D. The air flows out through the orifice 6E while being pressurized.
That is, the air damper 6 generates a pressure against a force for operating the bases 2 and 3 in a direction approaching from an initial position where the bases 2 and 3 are separated from each other.

When the grip force applied to the bases 2 and 3 is relaxed, the bases 2 and 3 move away from each other due to the weak elastic force of the return springs 7 and 8. In this case, as the two bases 2 and 3 move away from each other, the pistons 10 of the cylinder devices 4 and 5 slide and move while being guided by the cylinder body 9. On the other hand, in the air damper 6, when the two bases 2 and 3 move away from each other, the piston 6B returns within the cylinder body 6A. When the piston 6B returns within the cylinder body 6A, the one-way valve opens to allow air to flow through the orifice. Therefore, the air damper 6 generates pressure in a direction separating the bases 2 and 3 from each other. Instead, both bases 2 and 3 slowly return to the initial position.

Due to the characteristics of the air damper 6, only when the piston 6B is moving (when speed is applied), the air damper 6 generates a pressure that opposes the operating force in the moving direction and stops moving (speed is reduced). In the case of 0), the pressure does not occur.

On the other hand, return springs 7 and 8 for return
When the grip force applied to both bases 2 and 3 is relaxed by setting the resilient force to be weak in advance, the pressure for moving both bases 2 and 3 in the direction away from each other is weak.

That is, in the conventional gripper utilizing the resilience of a spring, pressure is exerted both when a grip force is applied and when the grip force is released, but the gripper utilizing the pressure generated by the air damper 6 described above. The first is that a large pressure is applied only when the grip force is applied, and when the grip force is loosened, the grip parts (bases 2 and 3) do not suddenly open, and a shock is applied to the gripping hand. Absent.

The pressure value of the air damper 6 can be adjusted, for example, at a rate of 10000/1 by adjusting the opening area of the orifice 6E. The operation can be easily performed, the pressure can be adjusted from a high pressure value to a low pressure value in a wide range, and the usability can be improved.

Further, depending on the size of the hand of the user of the gripper 1, the first inside rod 11A of the second inside rod 11B is
, That is, the position of the piston 10, the stroke amount of the two bases 2 and 3 can be adjusted, and the gripper can be used easily.

In the air damper 6, the cylinder body 6A is formed from Pyrex glass, the piston 6B is formed from carbon graphite, and the piston rod 6C is formed from fluorinated resin.
The durability can be improved and the service life can be extended.

[0042]

According to the gripper for enhancing grip strength of the present invention, a pair of bases for forming a pair of grip portions, at least one pair of freely expandable and contractible connecting means interposed so as to connect the two bases, and the two bases are separated from each other. An air damper that generates a pressure against a force operating in a direction approaching from the initial position,
And a base return elastic body for returning both bases to the initial position.Since a large pressure is applied only when a grip force is applied, a grip portion is used when the grip force is loosened. Since the base does not suddenly open and no shock is applied to the gripped hand, the usability can be improved and the safety can be improved. Further, when the opening area of the orifice of the air damper is adjustable, a single gripper can obtain a force against various gripping forces.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a gripper for enhancing grip strength according to the present invention.

FIG. 2 is a top view of the gripping force gripper according to the first embodiment.

FIG. 3 is a bottom view of the gripper for enhancing grip strength according to the first embodiment;

FIG. 4 is a sectional view of a cylinder portion of a cylinder body of the cylinder device.

FIG. 5 is a sectional view of a stopper cap of a cylinder body of the cylinder device.

FIG. 6 is a front view of a piston rod of the cylinder device.

FIG. 7 is a sectional view of an air damper.

FIG. 8A is a sectional view of an adjuster cap,
FIG. 2B is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gripper for strengthening grip strength 2, 3 Base for forming grip part 4, 5 Cylinder device (connection means) 6 Air damper 7, 8 Return spring (elastic body)

Claims (6)

[Claims] 1. A pair of bases for forming grip portions, which are disposed in parallel with each other at a predetermined interval, and are interposed between the bases so as to connect the bases, and the bases are close to and separated from each other. An air damper interposed between the two bases and generating a pressure against a force for moving the bases in a direction approaching from an initial position separating the bases; and an air damper between the bases. An elastic body for returning the bases to the initial position by generating a resilient force in a direction in which the two bases are separated from each other, and for enhancing grip strength. Gripper. 2. The gripper according to claim 1, wherein the base is formed of a plate member having a substantially rectangular shape and a substantially dish-shaped concave inside. 3. A cylinder device comprising a cylindrical cylinder main body, a piston slidably disposed in the cylinder main body, and a piston rod. The gripper for enhancing grip strength according to claim 1 or 2. 4. The gripper according to claim 1, wherein the cylinder device includes a stroke adjusting unit that adjusts an operation stroke of the two bases. 5. The air damper has an orifice in a cylinder body thereof communicating with an air chamber separated by a piston in the cylinder body, and a pressure for adjusting the pressure by adjusting an opening area of the orifice. The gripper for enhancing grip strength according to any one of claims 1 to 4, further comprising adjusting means. 6. The gripper according to claim 1, wherein the elastic body is a spring.