JPH09117574A - Opening and closing operation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hardly generate faults, to prevent enlargement and to easily detach/ assemble a lever body provided with a cutting blade from/to a cylindrical main body part when chipping and wearing occur in the cutting blade in a nipper device operated by air pressure. SOLUTION: The lever body 7 and a driving power part 4 for swinging and driving it are turned to the state of not being mechanically connected. The driving power part 4 drives a pressurizing piece 17 for closing movement for being abutted to the input end parts 11 of the lever body 7 and mutually bringing them closer in the case of closing the cutting blades 10 and the pressurizing piece 22 for opening movement for being abutted to the input end parts 11 of the lever body 7 and mutually separating them in the case of opening the cutting blades 10 by respectively different plungers 13 and 15 in a coaxial duplex structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device used as an air nipper or the like.

[0002]

2. Description of the Related Art Conventionally, a first conventional example shown in FIG. 5 and a second conventional example shown in FIG. 6 have been used as an air nipper used in an assembly line of electric parts or a site for cutting the ears of a cloth-like material. It is known. In the first conventional example shown in FIG. 5, 3
Reference numeral 0 is a cylindrical main body, 31 is a working head, and 32 is a power unit.

The work head 31 has an X-axis centered on the pivot 33.
It has a pair of lever bodies 34 which are pivotally supported so as to intersect in a letter shape. Each lever body 34 has an output end 35 on the side protruding from the tubular main body 30, and the output end 35 is provided with cutting blades 36 facing each other. The side housed in the tubular main body 30 is an input end 37, and the outer surface of the input end 37 at the projecting end is rounded. Reference numeral 38 is a spring that holds the output ends 35 in the open state.

The power unit 32 is constructed by a plunger 39 slidably accommodated in the cylindrical main body 30. Reference numeral 40 denotes a base portion that holds the plunger 39 in a manner that the plunger 39 cannot be removed from the tubular body portion 30, and an air supply passage 41 is formed in the base portion 40. 42 is the plunger 3
9 is a spring for urging 9 toward the base 40. The plunger 39 is formed with a tapered hole 43 that comes into contact with the outer surface (R-shaped surface) of the input end portion 37 of the lever body 34.

Therefore, in this first conventional example, by supplying compressed air to the air supply passage 41 from the state shown in FIG.
As shown in FIG. 3B, the plunger 39 advances to the left side of the drawing, whereby the lever body 34 brings both the input end portions 37 and the output end portions 35 closer to each other, and the cutting blade 36. Objects to be cut (for example, electric wires) can be cut by mutual closing movements. Further, by stopping the supply of the compressed air and allowing the air to be exhausted, the plunger 39 is retracted to the right in the drawing by the elastic force of the springs 38 and 42, and the lever body 34 is moved to the input end portions 37 and the output end portion 35.
Both of them are separated from each other, and the state returns to the state of FIG.

That is, in the first conventional example, the power unit 32 is constructed as a single-acting air cylinder. On the other hand, in the second conventional example shown in FIG. 6, the power unit 50 is configured as a double-acting air cylinder. Also the working head 51
In this case, although the lever bodies 52 are pivotally supported with the pivot portion 53 as a common fulcrum, they are held in a state where they do not intersect with each other.

In this power unit 50, the plunger 54 is
It has a stepped shape with the small diameter portion 55 near the lever body 52, and the cylindrical main body portion 56 has a peripheral portion of the small diameter portion 55 with respect to a holder portion 57 that holds the small diameter portion 55. A large-diameter portion for forming the peripheral space 58 is formed. A second air supply passage 61 communicating with the peripheral space 58 is formed on the peripheral wall of the tubular main body 56, in addition to the first air supply passage 60 provided in the base portion 59.

The tip of the plunger 54 is linked to the input end 64 of the lever body 52 via the link pins 62 and 63. Therefore, in this second conventional example, by supplying compressed air to the first air supply passage 60 from the state shown in FIG. 6 (a), the plunger 5 is moved as shown in FIG. 6 (b).
4 advances to the left in the drawing, whereby the lever body 52 separates the input end portions 64 from each other, and conversely causes the output end portions 65 to approach each other, and the cutting blades 66 mutually cut the object to be cut. Can be disconnected. Further, the supply of compressed air is stopped in the first air supply passage 60 to enable exhaustion, and the compressed air is supplied to the second air supply passage 61, whereby the plunger 54 moves backward to the right in the drawing, and the lever body 5 is released.
2 causes the input end portions 64 to approach each other, and conversely causes the output end portions 65 to move away from each other, returning to the state of FIG. 6A.

[0009]

In the first conventional example (see FIG. 5), the output end portion 35 (cutting blade 36) of the lever body 34 is formed.
Since the spring 38 for keeping the open state is constantly compressed and extended, the elastic force is apt to deteriorate or break, and maintenance has to be performed frequently.

On the other hand, in the second conventional example (see FIG. 6), the spring 38, which is indispensable in the first conventional example, is eliminated, so that the above-mentioned drawbacks of the first conventional example are eliminated. Has reached. However, in the second conventional example, the plunger 54 and the lever bodies 52 on both sides are connected to the link pin 62,
Since the link connection is made by 63, the tubular main body 56 needs to be divided into two parts, the power part 50 side and the work head 51 side. Also,
Since air piping is required for the second air supply passage 61, there is a drawback that the outer diameter is increased.

Not only the lever body 52 needs to be detached from the cylindrical main body 56 as needed or periodically for replacement or polishing due to chipping or abrasion of the cutting blade 66, but
When the lever body 52 is attached and detached, the link pin 6 is removed in parallel with the disassembly and assembly of the tubular main body 56 as described above.
There is a drawback that it is troublesome because it requires 2,63 disassembly and connection.

The present invention has been made in view of the above circumstances, and has a structure in which a spring, which causes frequent maintenance, is not used, and the structure of the lever is prevented from being complicated and the size of the lever body being increased. An object is to provide an opening / closing device such as an air nipper, which can be easily attached and detached.

[0013]

According to the present invention, the following technical measures have been taken in order to achieve the above object. The present invention
In order to make the output ends of a pair of lever bodies having an output end serving as a work head at one end and an input end of a power unit at the other end freely contactable with and separable from each other, The opening movement pressing piece and the closing movement pressing piece are separately provided so as to come into contact with and separate from each other.

There are a case where one of the lever bodies is fixed and the other is made swingable, and a case where both lever bodies are made swingable. In the case of swinging both lever bodies, the pivotal support may be common or non-common (ie,
It is also possible to provide each separately). The opening movement pressing piece and the closing movement pressing piece can be provided as independent members or as an integral member.

According to the present invention, a driving tool for driving the opening pressing piece and a driving tool for driving the closing pressing piece are separately provided.
A power unit is constituted by these two driving tools. When the opening movement pressing piece and the closing movement pressing piece are formed as an integral member, only one driving tool is required. According to the present invention, the lever bodies are housed inside one end side of the tubular main body except for their output ends, and the power unit for driving each pressing piece is provided on the other end side of the tubular main body. .

The tubular body may be cylindrical or prismatic. In the present invention, a fluid pressure cylinder is used as a drive tool for the power unit. Fluid pressure refers to air pressure, water pressure, hydraulic pressure and other liquid pressures. When a large force is not required for the work performed at the output end of the lever body, a solenoid or the like can be used as the driving tool.

According to the present invention, in the power unit, one driving tool is composed of the tubular main body and a tubular plunger slidable inside the tubular body, and the other driving tool is slidable inside the tubular plunger. A double cylinder structure is configured by being configured with a free core plunger. According to the present invention, the tubular main body is provided with a base portion for preventing the tubular plunger from coming out, and the base portion has a fluid supply path used for advancing the tubular plunger, and a backward movement of the tubular plunger. A fluid guide path used for advancing the core plunger is juxtaposed.

If miniaturization is not a problem, then
For example, the fluid guide path may be formed on the side surface of the tubular main body. According to the present invention, the cutting edge is provided on the output end of the lever body on the side facing each other. Depending on the shape of the cutting blade, it can be implemented as a nipper device, scissor device, or the like.

In addition to the cutting blade, it is possible to provide a head portion according to the mode of implementation as a clamp device, a caulking device, various processing devices and the like. The present invention comprises a tubular main body, a work head partially protruding from one end of the tubular main body, and a power unit provided at the other end of the tubular main body. The working head is a fulcrum part provided with a pair of lever bodies whose output end is a portion protruding outside the tubular main body and whose input end is a portion housed in the tubular main body. The power unit is configured to be pivotally supported in an intersecting manner with each other as a common fulcrum, and the power unit has a tubular main body, a tubular plunger slidably accommodated in the tubular main body, and a sliding member in the tubular plunger. It consists of a core plunger that is movably housed.At the tip of the cylindrical plunger, there is a closing pressing piece that brings the output ends closer to each other by contacting both outer surfaces of the input end of each lever body. In addition to being provided, each lever body is attached to the tip of the core plunger. Opening motion for pressing piece for mutually separating the output end portions by contact with both inner side surfaces of the input end is provided kicking.

The pressing piece for closing movement may be integral with or separate from the cylindrical plunger. Also for the pressing piece for opening,
The core plunger may be integral with or separate from the core plunger. The present invention comprises a tubular main body, a work head partially protruding from one end of the tubular main body, and a power unit provided at the other end of the tubular main body. The working head is a fulcrum part provided with a pair of lever bodies whose output end is a portion protruding outside the tubular main body and whose input end is a portion housed in the tubular main body. The power unit is configured so as to be pivoted without intersecting each other while having the common fulcrum as each other, and the power unit has a tubular main body, a tubular plunger slidably accommodated in the tubular main body, and the tubular plunger. It consists of a core plunger that is slidably housed inside, and the tip of the cylindrical plunger contacts the outer surfaces of the input end of each lever body to separate the output ends from each other for opening. A pressing piece is provided, and the tip of the core plunger is Closing a pressing piece for mutually approaching the output end portions by contact with both inner side surfaces of the input end of the lever body is provided.

The opening pressing piece may be integral with or separate from the cylindrical plunger. Also for the pressing piece for closing,
The core plunger may be integral with or separate from the core plunger. According to the present invention, the tubular main body portion is provided with a base portion for preventing the tubular plunger from escaping, and the tubular plunger portion is provided with a basal portion for preventing the core plunger from escaping,
A fluid supply path facing the base of the cylindrical plunger and a fluid guide tube penetrating the base of the cylindrical plunger and projecting into the cylinder to face the base of the core plunger are provided at the base of the cylindrical body. Radial step portions are formed on the inner peripheral surface of the tubular main body portion and the outer peripheral surface of the tubular plunger, respectively, and a circumferential space is provided between portions where these step portions face each other along the axial direction. The cylindrical plunger is formed with a communication passage that communicates the inside of the cylinder with the peripheral space.With these structures, the core plunger is driven as a single-acting fluid pressure cylinder to move forward, and the cylindrical plunger is moved. Is driven by a double-acting hydraulic cylinder to move back and forth.

According to the present invention, when the output ends of the lever body are brought close to each other and are separated from each other,
This is done by bringing each separate pressing piece into contact with the input end. That is, the lever body is not opened or closed and then returned by a spring, or linked with a plunger by link joining.

In driving the opening movement pressing piece and the closing movement pressing piece, separate driving tools are used, fluid pressure (air pressure, etc.) cylinders are used as the driving tools, and both driving tools are doubled. By adopting a cylinder structure and arranging these driving tools on the rear side of the lever body, the overall size can be reduced.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of an opening / closing device 1 according to the present invention, which is embodied as an air nipper, and FIG. 1 (a) is a plan sectional view showing an opened state, and FIG. ) Is a plan sectional view showing a closed state, and FIG. 2 is a partially crushed side view.

In FIGS. 1 and 2, 2 is a cylindrical main body, 3 is a working head, and 4 is a power unit. The cylindrical main body 2 is formed in a cylindrical shape, a horizontal groove-shaped head holding portion 5 for holding the working head 3 is provided on one end side thereof, and a cylindrical inner hole is provided on the other end side thereof. The base portion 6 capable of closing the screw is screwed. On the inner peripheral surface of the tubular main body 2, the inner diameter of about half of the portion where the power unit 4 is provided near the base 6 is slightly larger than that of the portion near the working head 3. .

The working head 3 comprises a pair of lever bodies 7 which are pivotally supported in a crossed manner with a pivoting portion 8 which is screwed in a state of vertically penetrating the head holding portion 5 of the cylindrical main body portion 2 as a fulcrum. . In each lever body 7, the side projecting from the tubular main body 2 is an output end 9, and the output end 9 is provided with a cutting blade 10 on the side facing each other. These cutting blades 10 are in a butt shape when the output ends 9 are closest to each other. Also, in each lever body 7,
The side accommodated in the tubular main body 2 is the input end 11,
The input end portions 11 are formed in a rounded surface shape in which inner corner portions facing each other and outer corner portions opposite to each other are smooth.

As shown in FIG. 2, a screw having a long neck portion 8a is used for the pivot portion 8, and the neck portion 8a has a long screw.
Spring 1 for biasing and holding the overlapping state of the lever bodies 7
2 has been inserted. It goes without saying that both lever bodies 7 can be removed from the cylindrical main body portion 2 only by removing this pivotal support portion 8. The power unit 4 has a double cylinder structure composed of an outer driving tool 14 and an inner driving tool 16, of which the outer driving tool 14 is slidable in the tubular main body 2 and inside thereof. Consisting of a cylindrical plunger 13,
The inner driving tool 16 is composed of the cylindrical plunger 13 and a core plunger 15 which is slidable inside the cylindrical plunger 13.

The cylindrical plunger 13 is formed of a resin material in a cylindrical shape, and its tip (left end in the drawing) has a tapered shape in which the inner diameter of the cylinder is expanded toward the open end. The taper portion is formed on the pressing piece for closing 1
7 is set. The closing movement pressing piece 17 is capable of contacting the outer surface (corner radius surface) of the input end 11 of the lever body 7 when the cylindrical plunger 13 moves to the left in the drawing.

A base portion 18 is integrally provided at the rear end portion of the cylindrical plunger 13, and the core plunger 15 is provided.
Has prevented the escape. The base portion 18 is formed to have a diameter slightly larger than the outer diameter of the cylindrical plunger 13, and is fitted into the large-diameter portion of the cylindrical main body portion 2 described above. Therefore, the step portion 1 in the large-diameter portion of the tubular main body portion 2
9 and the step portion 20 in the base portion 18 of the cylindrical plunger 13 are opposed to each other along the axial direction, and a circumferential space 21 is formed between them. This surrounding space 21
Expands and contracts by sliding the cylindrical plunger 13.

The core plunger 15 is made of a metallic material and is formed into a bullet shape. The tip end portion (the left end side in the drawing) of the core plunger 15 has a tapered portion which serves as the opening pressing piece 22. This opening pressing piece 22 is provided with the core plunger 15
Can contact the inner side surface (corner radius surface) of the input end portion 11 of the lever body 7 when is moved to the left in the drawing.

A fluid supply passage 23 facing the base portion 18 of the cylindrical plunger 13 is formed in the base portion 6 of the cylindrical main body portion 2 and, in addition to the fluid supply passage 23, the cylindrical plunger 13 is provided. A fluid guide tube 24 is provided which penetrates the base portion 18 and projects into the inside of the cylinder. This fluid guide tube 2
The inside of 4 is a fluid guide path 25 that faces the base of the core plunger 15. Further, on the outer peripheral surface of the cylindrical plunger 13, a communication passage 26 that communicates the inside of the cylinder and the peripheral space 21 is formed.

Therefore, in this first embodiment, as shown in FIG.
By supplying compressed air to the fluid supply path 23 from the state of (1), the cylindrical plunger 13 advances to the left side of the drawing as shown in FIG. Both outer side surfaces of the portion 11 are pressed inward. Therefore, the output ends 9 of the lever bodies 7 come close to each other, and the objects to be cut (for example, electric wires) can be cut by the closing movement of the cutting blades 10 with each other. When the input ends 11 of both lever bodies 7 approach each other as described above,
Since the inner side surface of the input end 11 presses the opening pressing piece 22 of the core plunger 15, the core plunger 15 is retracted to the right in the drawing.

On the other hand, by stopping the supply of the compressed air to the fluid supply passage 23 so that the fluid can be exhausted and supplying the compressed air to the fluid guide passage 25, as shown in FIG. And the opening pressing piece 22 presses both inner side surfaces of the input ends 11 of both lever bodies 7 outward. Moreover, the compressed air from the fluid guide passage 25 flows into the peripheral space 21 through the communication passage 26 and acts so as to push the step portion 20 of the cylindrical plunger 13, so that the cylindrical plunger 13 retreats. As a result, the input ends 11 of both lever bodies 7 are separated from each other, and the cutting blades 10 open.

That is, the power unit 4 of the first embodiment is constructed as a single-acting fluid pressure cylinder in which the inner drive tool 16 causes the core plunger 15 to advance by fluid pressure and retracts by a cam. Outer drive 14
However, it is configured as a double-acting fluid pressure cylinder in which the tubular plunger 13 is advanced and retracted by fluid pressure.

FIG. 3 shows a second part of the opening / closing device 1 according to the present invention.
An example is shown. The second embodiment is different from the first embodiment in that the lever bodies 7 are pivotally supported without intersecting each other while using their fulcrums as common fulcrums. Along with this, the tip end portion of the cylindrical plunger 13 is connected to the input end portion 11 of each lever body 7.
The push-out piece 22 for opening is provided to separate the output end portions 9 from each other by abutting the outer side surfaces thereof, and the tip end portion of the core plunger 15 is located inside the input end portion 11 of each lever body 7. It is a closing pressing piece 17 that brings the output end portions 9 closer to each other by abutting on the side surface.

Since the other structure and operation are substantially the same as those of the first embodiment, the detailed description will be omitted by giving the same reference numerals to the same members. FIG. 4 schematically shows a third embodiment of the opening / closing device 1 according to the present invention, in which one (lower side in the drawing) of the lever bodies 7 is fixed and the other lever body (upper side in the drawing). An opening movement pressing piece 22 and a closing movement pressing piece 17, which are integrally provided with each other, can be brought into contact with and separated from the input end portion 11 of 7. Further, both pressing pieces 22 and 17 are driven by one driving tool 14.

[0037]

According to the present invention, which has the above-described structure, each pressing piece is provided with an input end portion when the output ends of the lever body are brought close to each other or separated from each other. The link joint structure with the return spring and the plunger is not adopted. Therefore, there is no fear of frequent maintenance, and the lever body can be attached and detached to and from the tubular main body very easily.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing a first embodiment of an opening / closing device according to the present invention, in which (a) is an open state and (b) is a closed state.

FIG. 2 is a partially crushed side view of the first embodiment.

FIG. 3 is a plan sectional view showing a second embodiment of the opening / closing device according to the present invention, in which (a) is an open state and (b) is a closed state.

FIG. 4 is a schematic view showing a third embodiment of the opening / closing device 1 according to the present invention.

FIG. 5 is a plan sectional view showing a first conventional example of an opening / closing device, in which (a) is an open state and (b) is a closed state.

FIG. 6 is a plan sectional view showing a second conventional example of an opening / closing device, in which (a) is an open state and (b) is a closed state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening / closing device 2 Cylindrical main body 3 Working head 4 Power part 6 Base part (cylindrical main body) 7 Lever body 8 Pivot support 9 Output end 10 Cutting blade 11 Input end 13 Cylindrical plunger 14 Outer drive 15 Core plunger 16 Inner drive tool 17 Closing pressure piece 18 Base part (cylindrical plunger) 19 Step part (cylindrical body part) 20 Step part (cylindrical plunger) 21 Circumferential space 22 Opening pressure piece 23 Fluid supply path 24 Fluid guide pipe 25 Fluid guide passage 26 Communication passage

Claims (1)

[Claims] 1. An output end (9) serving as a working head (3) is provided at one end and an input end (1) of a power unit (4) is provided at the other end.
In order to allow the output ends (9) of the pair of lever bodies (7) having 1) to come into contact with and separate from each other, the input ends (11)
Against this, the pressing piece for opening (22) and the pressing piece for closing (17)
An opening / closing operation device characterized in that and are separately provided so as to come into contact with and separate from each other.