JP2538779Y2 - Fluid pressure hand device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fluid pressure hand device, and more particularly to a technique which is effective when applied to a fluid pressure hand device in which an opening / closing lever is opened and closed by reciprocating motion of a piston. .

[Related Art] For example, as this type of fluid pressure hand device, a structure including a piston that reciprocates in a cylinder chamber and a pair of opening and closing levers that are opened and closed by the reciprocation of the piston is known.

In the fluid pressure hand device having such a structure, a pair of opening / closing levers hold a predetermined object to be gripped close to each other while maintaining a parallel state with each other, and separate from each other to release the object to be gripped, that is, The structure is roughly divided into a parallel opening / closing type structure and a structure in which an object to be gripped is gripped and released by swinging movement of a pair of opening / closing levers, that is, a swing opening / closing type structure.

[Problems to be Solved by the Invention] By the way, in the above-described fluid pressure hand device, a mechanism for surely gripping an object to be gripped of various sizes irrespective of a parallel opening / closing type and a swing opening / closing type. Is required.

That is, for example, without damaging the object to be gripped.
A mechanism for securely gripping with an appropriate gripping force is required.

The mechanism for that is required to have a simple structure without hindering the function as the fluid pressure hand device.

The purpose of the present invention is, without impairing the original gripping function,
An object of the present invention is to provide a fluid pressure hand device that can reliably hold an object to be gripped in accordance with various sizes of the object to be gripped and can simplify the structure.

The above and other objects and novel features of the present invention are as follows.
It will be apparent from the description of this specification and the accompanying drawings.

[Means for Solving the Problems] The fluid pressure hand device of the present invention is provided with a device main body in which two opening / closing levers are provided so as to be openable and closable, and each is pivotally attached to the device main body by a fulcrum pin. Has two swinging levers that engage with the opening and closing levers, and a piston rod that engages with the other end of each of the swinging levers, and is reciprocally provided in a cylinder chamber formed in the apparatus main body. The piston provided, two supply / discharge ports formed in the apparatus body in communication with two fluid chambers formed on both sides of the piston in the cylinder chamber, and a head cover attached to the apparatus body. An adjusting screw member, which is screwed to face the end face of the piston and abuts on the piston to adjust the stroke thereof, the adjusting screw member and the head cover; A sealing member provided between the opening and closing levers. The two opening / closing levers are moved between an open position and a closed position by moving the piston between a position in contact with the adjusting screw member and a position in contact with the apparatus body. And a second position.

[Action]

In the present invention, the stroke of the piston is adjusted by the adjusting screw member, and the opening / closing width or the opening / closing angle of the opening / closing lever is appropriately adjusted in accordance with the size of the object to be gripped, so that the gripping of various sizes is possible. An object can be securely held. Further, since the sealing member is provided between the adjusting screw member and the head cover, it is possible to reliably prevent the leakage of the fluid from the cylinder chamber, and the original gripping function of the fluid pressure hand device is hindered. Can be prevented.

〔Example〕

FIG. 1 is a partially cutaway sectional view of a hydraulic hand device according to an embodiment of the present invention.

The fluid pressure hand device of the present embodiment is of a parallel opening / closing type, and includes a pneumatic cylinder 1 as a driving unit, a lever mounting base 2, and a pair of opening / closing levers 3 mounted on the lever mounting base 2. It is configured.

The cylinder chamber 4 of the pneumatic cylinder 1 is formed by a cylinder body 6 and a head cover 7, and the cylinder body 6 and the head cover 7 are connected to each other by fastening means 5 such as hexagonal bolts, and the cylinder body 6 and the lever The apparatus main body is formed by the mounting base 2.

The cylinder chamber 4 is partitioned into fluid chambers 4A and 4B by a piston 8 accommodated in a reciprocating manner along the axial direction. The fluid chambers 4A and 4B are provided with supply / discharge ports 9A provided on the outer peripheral surface of the cylinder body 6. , 9B respectively.

A through-hole 10 is formed in the head cover 7 along the axial direction, and a female screw portion 10A is formed on the right end side of the through-hole 10.

An adjusting screw member 11 (stroke adjusting means) is screwed into the female screw portion 10A, penetrates the through hole 10, and projects axially in the fluid chamber 4B so as to be freely screwed.

Therefore, the stroke of the piston 8 can be adjusted by the amount of protrusion of the adjusting screw member 11 toward the fluid chamber 4B.

Since the adjusting screw member 11 penetrates the head cover 7 via a sealing member 12 such as an O-ring, leakage of fluid pressure in the cylinder chamber 4 due to the adjusting screw member 11 is reliably prevented.

The adjusting screw member 11 has a hexagon nut 13 for locking.
Is screwed.

Next, a piston rod 14 extends from the left end face of the piston 8 along the axial direction, and the piston rod 14 is moved from the cylinder body 6 through the seal member 15 to the lever mount 2.
It is projected to the side.

A pair of rod pins 14A are provided on both sides of the outer peripheral surface on the protruding end side of the piston rod 4.

A pair of swing levers 16 are pivotally supported by the fulcrum pins 17 on the lever mount 2, and the respective rod pins 14A are swingably fitted into pin receiving portions 16A at one end of the swing levers 16, respectively. Have been combined.

In each of the opening / closing levers 3, a fulcrum pin 18 and a guide hole 19 are formed on one surface of the base end portion at an interval from each other, and a slide guide pin 20 is formed on the other surface.

A fulcrum pin 18 of each open / close lever 3 is swingably fitted into a pin receiving portion 16B on the other end side of each swing lever 16, and a slide guide pin 20 of each open / close lever 3 is connected to the other open / close lever 3. Are slidably fitted in the guide holes 19 along the longitudinal direction.

Then, the linear reciprocating motion of the piston 9 and the piston rod 14 is converted into the opening and closing motion of the pair of opening / closing levers 3 through the swinging motion of the pair of swinging levers 16.
During the opening and closing movement of the
The opening and closing levers 2 are configured to be opened and closed while being held in parallel with each other by being guided and slid.

 In the drawing, reference numeral 21 denotes a seal member.

Next, the operation of the fluid pressure hand device of the present embodiment will be described.

For example, in the state shown in FIG.
When a fluid pressure such as compressed air is supplied to the fluid chamber 4A through the piston, the piston 8 and the piston rod 14 linearly move rightward in the drawing, and the right end surface of the piston 8 comes into contact with the left end surface of the adjustment bolt and stops.

The linear movement of the piston 8 and the piston rod 14 causes the pair of swing levers 16 to swing in the direction of the solid line arrows in FIG. Is transmitted to each of the opening / closing levers 3 via the fulcrum pin 18 of each of the opening / closing levers 3, so that each of the opening / closing levers 3 holds a predetermined grasped object (not shown) close to each other while maintaining a parallel state.

Next, in the closed state of the opening / closing lever 3, when a fluid pressure such as compressed air is supplied to the fluid chamber 4B through the supply / discharge port 9B, the piston 8 and the piston rod 14 displaced to the right in FIG. As shown, the piston 8 linearly moves to the left, and the left end surface of the piston 8 comes into contact with the left end surface of the cylinder chamber 4 and stops.

The linear movement of the piston 8 and the piston rod 14 causes the pair of swing levers 16 to swing outward with the respective fulcrum pins 17 as fulcrums. By being transmitted to the opening / closing levers 3 through the fulcrum pins 18 of each of the three, the gripping objects (not shown) held apart by holding the opening / closing levers 3 in parallel with each other as shown in FIG. ).

The hydraulic hand device of the present embodiment is operated in this manner.

In this case, according to the fluid pressure hand device of the present embodiment,
The opening and closing lever 3 is opened and closed in conjunction with the linear movement of the piston 8, and the stroke end of the piston 8 when the opening and closing lever 3 is closed is regulated by the adjusting screw member 11.
The opening / closing width or opening / closing stroke when the opening / closing lever 3 is closed can be adjusted by adjusting the amount of protrusion of the adjusting screw member 11 toward the fluid chamber 4B.

For this reason, the stroke of the piston 8 is adjusted by the adjusting screw member 11, and the opening / closing width of the opening / closing lever 3 is appropriately adjusted to correspond to the size of the object to be gripped, so that the object to be gripped of various sizes can be surely held. Can be grasped.

As described above, the adjustment of the opening / closing width of the opening / closing lever 3 is performed by the adjusting screw member 11 for adjusting the stroke of the piston 8.
That is, since the adjusting screw member 11 is protruded into the cylinder chamber 4 so as to be capable of screwing along the axial direction thereof,
Objects to be gripped of various sizes can be reliably gripped by the simplified structure.

Further, since the adjusting screw member 11 is provided on the head cover 7 via the sealing member 12, the adjusting screw member 11 is provided.
Fluid leakage of the cylinder chamber 4 caused by the
12, it is possible to prevent the fluid pressure hand device main body from being hindered.

As described above, the present invention has been specifically described based on the embodiments.
The present invention is not limited to the above embodiment, and can be variously modified without departing from the gist thereof.

For example, the fluid pressure hand device of the above embodiment has a parallel opening / closing structure, but in the present invention, for example, a swing opening / closing type in which a pair of opening / closing levers 3 are opened / closed by a swinging motion. It can be applied to a fluid pressure hand device.

In such a swinging opening / closing type fluid pressure hand device, the opening / closing angle of the opening / closing lever 3 is adjusted by the stroke adjusting means including the adjusting screw member 11 or the like.

Further, in the fluid pressure hand device of the above-described embodiment, the opening / closing lever 3 is closed by the piston rod 14 being drawn into the cylinder chamber 4. On the contrary, the piston rod 14 is It is also possible to adopt a structure in which the opening / closing lever 3 is opened by being pulled in.

Furthermore, in the fluid pressure hand device of the above embodiment,
Although the closing width of the opening / closing lever 3 is adjusted by the stroke adjusting means including the adjusting screw member 11 and the like, in the present invention, the widening width of the opening / closing lever 3 when the opening lever 3 is opened is controlled by the adjusting screw member 11 and the like. It is also possible to adopt a structure that is adjusted by the stroke adjusting means.

Further, the pneumatic cylinder 1 in the fluid pressure hand device of the above embodiment is of a double-acting type, but a single-acting type pneumatic cylinder may be applied.

〔effect〕

The effects obtained by typical ones of the inventions disclosed by the present application will be briefly described as follows.

(1). By adjusting the stroke of the piston by the stroke adjusting means and adjusting the opening / closing width or opening / closing angle of the opening / closing lever appropriately in accordance with the size of the object to be gripped, the object to be gripped of various sizes can be securely held. be able to.

(2). Since the adjustment of the opening / closing width or the opening / closing angle of the opening / closing lever is performed by the adjusting screw member for adjusting the stroke of the piston, it is possible to reliably hold various sizes of objects to be gripped by a simplified structure.

(3). In the above case, since the adjusting screw member is provided on the cover forming the cylinder chamber via a sealing means, the sealing means surely prevents fluid pressure leakage of the cylinder chamber caused by the adjusting screw member. Thus, the original gripping function of the fluid pressure hand device can be prevented from being hindered.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view of a hydraulic hand device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Pneumatic cylinder, 2 ... Lever mounting base, 3 ... Opening / closing lever, 4 ... Cylinder chamber, 4A ... Fluid chamber, 4B ... Fluid chamber, 5 ... Fastening means, 6 ... Cylinder body, 7 …… Head cover, 8… Piston, 9… Piston, 9A ……
Supply / discharge port, 9B ... Supply / discharge port, 10 ... Through hole, 10A ...
... female screw part, 11 ... adjustment screw member (stroke adjusting means), 12 ... sealing member, 13 ... hexagonal nut, 14 ... piston rod, 14A ... rod pin, 15 ... sealing member, 16 ... swing Lever, 16A: Pin receiving section, 16B: Pin receiving section, 17: Support pin, 18: Support pin, 19: Guide hole, 20: Slide guide pin, 21: Seal member.

Claims (1)

(57) [Scope of request for utility model registration] 1. An apparatus main body having two openable and closable levers provided so as to be openable and closable, and two oscillating levers each of which is swingably attached to the apparatus main body by a fulcrum pin and one end of which is engaged with the openable and closable lever. A piston having a piston rod engaged with the other end of each of the swing levers, and a piston reciprocally provided in a cylinder chamber formed in the apparatus main body; and both sides of the piston in the cylinder chamber. 2 formed in
Two fluid chambers respectively communicating with the two fluid chambers, and two supply / discharge ports formed in the apparatus main body, and a head cover attached to the apparatus main body, which is screwed to face the end face of the piston, An adjusting screw member for adjusting a stroke, a sealing member provided between the adjusting screw member and the head cover, and a position at which the piston comes into contact with the adjusting screw member and a position at which the piston comes into contact with the device main body. Wherein the two open / close levers are actuated to two positions, an open position and a closed position.