JPH10179950A - Tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool having short length so as to store in a small place and make it easy to handle, with which bigger action force can be obtained by smaller force. SOLUTION: A metal cutting scissors 1 are comprised of a pair of handle members 2 and 3, and a pair of cutting edge members 4 and 5. The pair of handle members 4 and 5 are provided with gripping parts 2e and 3e on the rear parts, and the front ends are journaled to rotate each other through a first shaft member 6. Each rear end of the pair of cutting edge members 4 and 5 are journaled to rotate, between the first shaft member 6 of each handle member and the gripping parts 2e and 3e, through a second shaft member 8 and a third shaft member 9 respectively. The cutting edge members 4 and 5 are also journaled to rotate each other through a fourth shaft member 10 in front of the first shaft member 6. Cutting edge parts 4c and 5c are formed on each of the cutting edge members 4 and 5. The metal cutting scissors 1 are constituted by journaling the rear ends of the cutting edge members 4 and 5 at the rear of the first shaft member 6, which journals each of the handle members 2 and 3. Thereby the full length of the scissors are shorter, and the length from the handle parts 2e and 3e to the cutting edge parts 4c and 5c are also shorter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool that can be used for cutting, crimping, and the like.

[0002]

2. Description of the Related Art Conventionally, as a tool for cutting a metal plate, for example, there is a scissors 21 as shown in FIG. This is because the grip portions 22a, 22a and the blade portions 23a, 23a as the acting portions are formed as separate components in order to apply a large force to the blade portions 23a, 23a with a small force. . In other words, a pair of handle members 22 and 22 having grip portions 22a and 22a at their rear portions are pivotally supported at positions near the front and are rotatably supported at substantially intermediate positions. A blade member 23, 23 as a pair of action members, having blade portions 23a, 23a as action portions formed at its front part. The blade members 23, 23 have their rear ends pivoted to the front ends of the handle members 22, 22, respectively, which are located further forward than the shaft portion 24 on which the handle members 22, 22 are pivotally supported. It is supported as much as possible. Thus, the gripping portions 22a of the handle members 22, 22
When the handle members 22, 22 are opened and closed with each other while holding the handle 22 a, the rear ends of the blade members 23, 23 via the respective shaft portions 25, 25 that support the handle members 22, 22 and the blade members 23, 23. The parts are closed and opened to each other, and accordingly, each blade member 23, 23
The blade portions 23a, 23a formed on the base member are opened and closed with each other, and can cut the metal plate. At this time, each blade member 2
The distance between the shaft portion 26 that supports the shaft members 3 and 23 and the shaft portions 25 and 25 that support the blade members 23 and 23 and the handle members 22 and 22 is determined by the shaft portion 24 that supports the handle members 22 and each other. A shaft portion 25 for supporting the blade members 23, 23 and the handle members 22, 22;
It is longer than the distance to 25. Therefore, the gripping portions 2a and 22a of the gripping portions 2a are brought closer to each other.
When gripping 2a, 22a, a large force can be applied to blade portions 23a, 23a.

[0003] A torsion spring 27 is attached to a shaft portion 24 that supports the handle members 22 and 22 to each other. The torsion spring 27 has its ends 27a, 27a abutting against the inner surfaces of the handle members 22, 22, respectively, to hold the handle members 22, 22 in their gripping portions 2
2a, 22a open each other, that is, the shaft portions 25, 2
The blades 23a, 23a are urged so as to open from each other through the fifth member 5. And, at the rear end of one handle member 22,
A locking fitting 28 is attached, and during storage, the locking fitting 28 locks the rear end of the other handle member 22, thereby resisting the urging force of the torsion spring 27. The gripping portions 22a, 22a of the handle members 22, 22 are closed to each other, that is, each blade portion 2 is connected via the shaft portions 25, 25.
3a and 23a can be maintained in a mutually closed state.

Conventionally, there has been a crimping tool as a tool for crimping a sleeve or a terminal in addition to a tool for cutting a metal plate. This crimping tool includes the blade portions 23a, 2
A crimping portion was formed as an action portion instead of 3a, and the other structure was the same as that of the scissors 21.

[0005]

By the way, the tools such as the above-mentioned conventional cutting scissors and crimping tools are the working members 23, 23.
Since the rear end portion and the front end portions of the handle members 22 and 22 are pivotally supported, the overall length is long, and as a result, space is required for storage. In addition, the gripping portions 22a, 22a to the action portion 23a,
There is a problem that the working portions 23a, 23a are far from the hand and are difficult to handle when cutting the metal plate or crimping the sleeve or the like, because the distance to the contact 23a is long. Further, when the locking fitting 28 is released, the respective action parts 23a, 23a are opened by the urging force of the torsion spring 27, but the opening may be larger than necessary. As a result, the operation of closing each of the action portions 23a, 23a from a position that is unnecessarily open to each other to a position where the action portions 23a, 23a function is a wasteful movement, and the work efficiency is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional drawbacks. It is an object of the present invention to obtain a large acting force with a small force and to save a space for storage. Another object is to provide tools that are easy to handle.

It is another object of the present invention to provide a tool which is effective in working without the action portions being unnecessarily opened from each other.

[0008]

The tool according to the present invention comprises:
To achieve the above object, the following configuration is provided. In other words, the invention according to claim 1 includes a pair of handle members extending back and forth, each having a grip portion at a rear portion, and a front end portion pivotally supported by a first shaft member so as to be rotatable with each other. Extending back and forth, a rear end portion of each handle member is rotatably supported by a second shaft member and a third shaft member between the first shaft member and the grip portion. And a pair of action members rotatably supported by a fourth shaft member in front of the first shaft member. Each of the action members has an action portion that opens and closes each other by the mutual rotation of the action members. As a result, the fourth
The distance between the second shaft member and the second or third shaft member is longer than the distance between the first shaft member and the second or third shaft member. When they turn each other,
A large force acts on the action part by the leverage principle. Further, the rear end of the action member is provided with a first member for pivotally supporting the handle members.
Since it is pivotally supported behind the shaft member, the overall length is short, and the distance from the grip portion to the action portion is also short.

Further, as in the second aspect of the present invention, the operating portion of each of the operating members may be formed of a blade, and may be formed in front of the fourth shaft member. With this, when the blades are opened to each other, the blades are opened forward, and thereafter, an object to be cut such as a metal plate is inserted between the blades to close each blade. Thus, the object can be cut.

Further, one of the blades of each of the working members extends linearly, and the other has a
It may extend in a convex curved shape. Thereby, in the process of cutting the object to be cut, the blade portion extending in the shape of a convex curve comes into contact with the object to be cut, rather than the distance at which the linearly extending blade portion contacts the object to be cut. The distance traveled is long, and as a result, the object to be cut is relatively torn off by the two blade portions. Therefore, the object to be cut can be easily cut by the cooperation of the pulling-off and a large force acting on the blade serving as the action portion when the grip portion is operated.

According to a fourth aspect of the present invention, there is provided an urging member for urging the respective action portions in a direction to open each other, and is movably attached to the handle member or the action member. By locking other handle members or action members, in one movement position, the respective action portions are prevented from opening from a closed state in which they are closed to each other, and in the other movement position, the respective action portions are prevented from opening. May be provided to prevent each other from opening more than a required opening angle. Thereby, in spite of the action members being urged in the direction of opening each other by the urging member, when storing, by moving the locking member to one of the movement positions,
When the action parts are held in a closed state with each other, and when used, by moving the locking member to the other movement position,
It is possible to prevent the action portions from opening to each other more than the required opening angle, thereby preventing unnecessary opening of the action portions.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the tool according to the present invention will be described below with reference to the drawings.

FIGS. 1 to 9 show an embodiment in which the tool according to the present invention is embodied as cutting scissors. These scissors 1
Is composed of a pair of handle members 2 and 3 and a pair of blade members 4 and 5 as a pair of action members. Each of the pair of handle members 2, 3 is composed of a main body 2a, 3a made of a steel plate and resin parts 2b, 3b in which the main bodies 2a, 3a are covered with a synthetic resin. The main bodies 2a, 3a are formed to extend back and forth (up and down in FIG. 1), and the rear part is bent in a U-shaped cross section (see FIG. 5). The front portions of the main body portions 2a, 3a are formed such that only opposing pieces having a U-shaped cross section of the rear portion extend forward, and at the front end, the opposing pieces 2c, 2d and 3c, 3d. One piece 2c, 3c is
the distance between c and 2d, and the opposing pieces 3c and 3d
(See FIGS. 2 and 3). The resin portions 2b, 3b are formed so as to cover substantially the entire rear portions of the main bodies 2a, 3a with a uniform thickness, and the intermediate portions of the resin portions 2b, 3b are Function as the gripping portions 2e, 3e of the first. Further, holes 2f, 3f are formed in the front ends of the main bodies 2a, 3a so as to penetrate the opposing pieces 2c, 2d and 3c, 3d, and the holes 2f, 3f and the grip portion 2e are formed. , 3e, similarly facing pieces 2
c, 2d and 3c, 3d, holes 2g,
3 g are drilled. The handle members 2 and 3 are arranged such that the facing pieces 2c and 2d and 3c and 3d are alternately arranged, and the holes 2f and 3f at the front end are overlapped so as to be concentric. By inserting the first shaft member 6 made of a bolt, the first shaft member 6 is rotatably supported by each other (see FIG. 6). And
After the first shaft member 6 is inserted, a nut 7 is screwed into the tip of the first shaft member 6 and stopped.

On the other hand, each of the pair of blade members 4, 5 is made of tool steel, and is formed so as to extend back and forth (up and down in FIG. 1) while bending in a crank shape. And
Holes 4a, 5a are drilled at the rear end of each of the blade members 4, 5, and holes 4b, 5b are also drilled at an intermediate portion bent in a crank shape. In front of the holes 4b, 5b of the blade members 4, 5, blade portions 4c, 5c are formed, respectively, as action portions extending to the front and rear, and one blade portion 4c is linearly formed. Extend, the other blade 5
c extends in a convex curved shape. The pair of blade members 4 and 5 have their rear ends facing the handle members 2 and 3 such that the holes 4a and 5a of the blade members 4 and 5 are concentric with the holes 2g and 3g of the handle members 2 and 3, respectively. Between pieces 2c and 2d and 3
c and 3d, and the second shaft member 8 and the third shaft member 9 made of rivets are inserted into the communicating holes 4a and 2g and the communicating holes 5a and 3g, respectively. Thus, it is rotatably supported by the handle members 2 and 3 (see FIG. 7). Further, the blade member 4,
5 are superimposed so that the holes 4b and 5b are concentric,
The fourth shaft member 10 made of a rivet is inserted into the communicating holes 4b and 5b to be rotatably supported by each other (see FIG. 8). At this time, the fourth shaft member 10 is located ahead of the first shaft member 6.
Then, by the rotation of the blade members 4, 5, the blade portions 4c,
5c will open and close mutually. Note that these second
Shaft member 8, third shaft member 9, and fourth shaft member 10
After insertion, the tip is swaged and stopped.

A torsion spring 11 is fitted to the first shaft member 6 as a biasing member. This torsion spring 11 has both ends 11a, 11a.
Are in contact with the rear ends of the blade members 4 and 5, respectively, and urge the rear ends of the blade members 4 and 5 in the direction of opening each other, that is, in the direction of opening each of the blade portions 4c and 5c.

Further, a locking member 12 is attached to one blade member 4 so as to be located between the third shaft member 9 and the fourth shaft member 10. This locking member 12
It is made of a plate material and extends back and forth along one blade member 4, the tip of which serves as a locking portion 12a for locking the other blade member 5, and a hole 12b is drilled in the rear portion. .
Further, the locking member 12 has an operating portion 12 which is bent at a right angle to the rear portion so as to be along the side surface of the one blade member 4.
c is formed. The rivet 13 is inserted into the hole 12b of the locking member 12 and the hole 4d formed in the one blade member 4 through the spring washer 14 and caulked. The rivet 13
(See FIG. 9). In FIG. 1 showing the state in which the blade portions 4c and 5c are closed with each other, the locking member 12 is configured such that the locking portion 12a is connected to the first locked portion 5d on the side surface of the other blade member 5. It is at one of the rotational movement positions for locking, and prevents the blade portions 4c, 5c from opening each other from a closed state. In addition, in one rotational movement position of the locking member 12, the front end of the operating portion 12c of the locking member 12 abuts against the side surface of the blade member 4, and the locking member 12 rotates clockwise. Is blocked. In FIG. 4, the locking member 12 is rotated counterclockwise from one of the rotational movement positions in FIG. 1, and the blades 4 c and 5 c are open from each other.
The locking portion 12a is located at the other rotational movement position for locking the second locked portion 5e on the side surface of the other blade member 5, and the blade portions 4c and 5c are opened to each other by a required opening angle or more. Has been blocked. Further, at the other rotational movement position of the locking member 12, the rear end of the operating portion 12c of the locking member 12 abuts against the side surface of the blade member 4, and the locking member 12 moves in the counterclockwise direction. Rotation is prevented.

Next, the operation and effect of the cutting scissors 1 having the above configuration will be described. When the cutting scissors 1 are stored, when the locking member 12 is rotated to one of the rotational movement positions with the blade portions 4c and 5c closed, the locking member 12
Locks the first locked portion 5 d of the blade member 5, and
The blades 4c, 5c are held in a closed state against each other against the urging force of the torsion spring 11 that urges the blades c, 5c in the opening direction (see FIG. 1).

When the scissors 1 are used, the thumb is held by the locking member 1 while holding both grips 2e, 3e with one hand.
Then, the locking member 12 is rotated counterclockwise to the other rotational movement position with the thumb of the second operating portion 12c.
Then, the locking portion 12a of the locking member 12 is
From the first locked portion 5d. Then, the blade members 4 and 5 and the handle members 2 and 3 are rotated by the biasing force of the torsion spring 11, and the blade portions 4c and 5c and the grip portions 2e and 3e are opened. These blades 4
When c and 5c are opened to a required opening angle, the second locked portion 5e of the blade member 5 comes into contact with the locking portion 12a of the locking member 12. As a result, the blade member 5 is locked by the locking member 12, and the blade portions 4c, 5c are prevented from opening each other at a required opening angle or more, and unnecessary opening of the blade portions 4c, 5c is prevented. Can be prevented (see FIG. 4). Therefore, the handle members 2, 3
Of the handle members 2e, 3e,
The second shaft member 8 and the third shaft member that pivotally support the handle members 2, 3 and the blade members 4, 5 when they are opened and closed by rotating about the shaft of the first shaft member 6. The rear end portions of the blade members 4, 5 open and close with each other via 9. Accordingly, the blade members 4 and 5 rotate around the axis of the fourth shaft member 10, and the blade portions 4c and 5c of the blade members 4 and 5 are opened and closed with each other. Here, when the blade portions 4c, 5c are opened to each other, the blade portions 4c, 5c open forward, and thereafter, an object to be cut such as a metal plate is inserted between the blade portions 4c, 5c. By operating the gripping portions 2e, 3e, each blade 4
By closing c and 5c with each other, the object to be cut can be cut. At this time, the distance between the fourth shaft member 10 and the second or third shaft member 8, 9 is longer than the distance between the first shaft member 6 and the second or third shaft member 8, 9. When the handle members 2e and 3e are operated to rotate the handle members 2 and 3 with respect to each other, a large force acts on the blade portions 4c and 5c by the principle of leverage. Further, in the process of cutting the object, the blade portion 5c extending in a convex curved shape comes into contact with the object to be cut, rather than the distance in which the linearly extending blade portion 4c contacts the object to be cut. The moving distance becomes longer, and as a result, the object to be cut is relatively cut off by the two blades 4c and 5c. Therefore, the object to be cut can be easily cut by cooperation of the pulling and the large force acting on the blade portions 4c, 5c when the grip portions 2e, 3e are operated.

When the scissors 1 are to be stored after use, the grippers 2e, 3e are gripped, and the grippers 2e, 3e are gripped.
When the blades 4c and 5c are closed with each other by closing e with each other, the second locked portion 5e of the blade member 5 is separated from the locking portion 12a of the locking member 12. Therefore, both gripping parts 2
e, holding the thumb while holding the 3e
2c, the thumb is used to rotate the locking member 12 clockwise to one rotational movement position. Then, the locking portion 12a of the locking member 12 comes into contact with the first locked portion 5d of the blade member 5, and locks the blade member 5. Therefore, the blade members 4 and 5 are held in a state where the blade portions 4c and 5c are closed to each other, against the biasing force of the torsion spring 11 that biases the blade portions 4c and 5c in the opening direction.

Here, since the locking member 12 is pressed against the one blade member 4 by the spring washer 14, it does not easily rotate at one rotation position and the other rotation position. It has become. And these snips 1
, The rear ends of the blade members 4 and 5 are
Are supported by the second and third shaft members 8 and 9 located behind the first shaft member 6 that supports each other.
The overall length is short, and the gripping portions 2e, 3e
The distance to c and 5c is also shorter. Therefore, it does not take up space for storage, and when the grip portions 2e, 3e are gripped by hand, the blade portions 4c, 5c are close to the hand and easy to handle. Further, the locking member 12 can be used for both storage and use.
Is switched, the blade portions 4c and 5c are kept closed and can be safely stored when stored, and when used, each blade portion 4c and 5c can be safely stored.
Since c and 5c do not open each other more than a required opening angle, unnecessary opening of the blade portions 4c and 5c can be prevented, and work efficiency is high. Moreover, the operating portion 12c of the locking member 12 is located in front of the grip portions 2e, 3e,
Since the operation unit 12c can be operated while holding the e and 3e with hands, the usability is good.

Note that the present invention is not limited to the above-described embodiment, and various other modifications are possible. For example, the tool according to the present invention can be applied to a cutting tool other than the metal scissors 1 such as a cutting tool such as a wire, and further, may be applied to a tool such as a crimp tool for crimping a sleeve or a terminal. Here, in the case where the present invention is applied to a crimping tool, a crimping portion corresponding to a crimping shape of a sleeve or a terminal may be formed as an action portion instead of the blade portions 4c and 5c. The locking member 12 is rotatably attached to the blade member 4, but may be slidably attached. In addition, the locking member 12 is attached to any one of the handle members 2 and 3 or each of the blade members 4 and 5 even if it is not attached to one blade member 4 and locks the other blade member 5. It is sufficient that the other handle members 2 and 3 or the blade members 4 and 5 are locked. Further, the torsion spring 11 as an urging member may be, for example, a fourth spring if the blade parts 4c, 5c are directly or indirectly urged to open each other without being attached to the first shaft member 6. Shaft member 10
It may be attached to. Further, the biasing member is not necessarily limited to the torsion spring 11, but may be a coil spring, a leaf spring, or the like. Further, the grips 2e, 3e are not operated with one hand, but use both hands, that is, hold one grip 2e with one hand and hold the other grip 3e with the other hand. It may be a device that is operated by holding.

[0022]

As is apparent from the above, the tool according to the present invention has the following effects.

According to the tool described in the first aspect, a large acting force can be obtained with a small force, and since the entire length is short, a space is not required for storage. Further, since the distance from the grip portion to the action portion is short, when the grip portion is gripped by hand, the action portion is close to the hand and easy to handle.

According to the tool described in claim 2, an object to be cut such as a metal plate can be cut.

According to the tool described in claim 3, the object to be cut can be cut more easily.

Further, according to the tool described in claim 4, when the storage is performed by switching the locking member between the case of storage and the case of use, the respective action parts are closed to each other when storing. It is kept in a state and can be stored safely, and when used, the working parts do not open to each other more than necessary, and the work efficiency is high.

[Brief description of the drawings]

FIG. 1 is a front view showing a state in which a tool according to an embodiment of the present invention is stored.

FIG. 2 is a left side view of the same.

FIG. 3 is a right side view of the same.

FIG. 4 is a front view showing a state in which the embodiment of the tool according to the present invention is used.

FIG. 5 is a sectional view taken along line AA in FIG.

FIG. 6 is a sectional view taken along line BB in FIG. 1;

FIG. 7 is a sectional view taken along line CC in FIG. 1;

FIG. 8 is a sectional view taken along line DD in FIG.

FIG. 9 is a sectional view taken along line EE in FIG. 1;

FIG. 10 is a front view showing a conventional tool.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 cutting scissors (tool) 2 handle member 2 e gripping portion 3 handle member 3 e gripping portion 4 blade member (working member) 4 c blade portion (working portion) 5 blade member (working member) 5 c blade portion (working portion) 6 First shaft member 8 second shaft member 9 third shaft member 10 fourth shaft member 11 torsion spring (biasing member) 12 locking member

Claims (4)

[Claims] A pair of handle members each of which extends back and forth, has a grip portion at a rear portion, and whose front end portions are pivotally supported by a first shaft member so as to be rotatable with each other; A rear end portion is rotatably supported by the second shaft member and the third shaft member between the first shaft member and the grip portion in each handle member,
A pair of operating members rotatably supported by a fourth shaft member in front of the first shaft member, and each of the operating members includes A tool with action parts that open and close with each other. 2. The tool according to claim 1, wherein the action portion of each of the action members comprises a blade, and is formed in front of the fourth shaft member. 3. The tool according to claim 2, wherein one of the blade portions of each of the action members extends linearly, and the other extends in a convex curved shape. 4. The tool according to claim 1, further comprising an urging member that urges each of the operation portions in a direction to open each other, and is movable to the handle member or the operation member. And the other handle members or action members are locked to prevent the action portions from opening from each other in a closed state in one movement position, and in the other movement position in the one movement position. A tool provided with a locking member for preventing the action portions from opening each other at a required opening angle or more.