JPH07123863A - Scissors - Google Patents

Abstract

(57) [Summary] [Purpose] With a very simple operation, the relative rotation range of the cutting edge portion and the grip portion can be adjusted, hands and fingers are not tired, and work efficiency can be greatly improved. A control means is provided which is capable of adjusting a relative rotation range of a cutting edge portion and a grip portion by rotating an operating body provided near a pivot shaft of a grip portion.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to scissors capable of adjusting the turning range of a cutting edge portion and a grip portion and locking the cutting edge portion and the grip portion in a closed state.

[0002]

2. Description of the Related Art For example, in gardening shears for cutting flowers and tree branches, a spring is interposed between a pair of grips. Therefore, the grip portion and the cutting edge portion are expanded in a natural state.

When the grip portion is elastically biased by interposing the spring, and the gripping force of the grip portion is weakened, the cutting edge portion is expanded by the elasticity of the spring, and the operation can be easily performed with one hand. it can.

On the other hand, in the scissors provided with the spring as described above, since the cutting blade portion is widened in a natural state, it is inconvenient when it is stored. Therefore, a cover is provided on the cutting edge portion, or, for example, the actual cutting flat 1-255555.
A mechanism that can hold the grip and the cutting edge in the closed state is often provided, such as the scissors described in the publication.

[0005]

By the way, in the above gardening scissors, a tree branch to be cut or a
The thickness of the flowers is not constant. That is, it must cut from very thin to relatively thick tree branches.

On the other hand, in the above-mentioned conventional gardening scissors, since the spring is interposed between the grips as described above, when the gripping force acting on the grips is released, the grips and the cutting edge are released. The part is moved to the maximum. Therefore, the operator has to rotate the grip portion that has been opened to the closed state again.

Therefore, when cutting a relatively thin branch continuously, the user moves the grip from the maximum open position to
It is necessary to repeat the turning operation to the closed position. Further, the elastic force of the spring is always applied to the fingers.

As a result, the conventional gardening scissors have a problem that the operator's hands become very tired. Further, since the grip portion has to be rotated in an unnecessarily large range against the spring, the work efficiency is reduced.

Especially when a person with small hands such as a woman uses gardening scissors, the opening angle of the grip is too large,
It may be difficult to use continuously.

The present invention has been devised under the circumstances described above. It solves the above-mentioned problems of the prior art, and the relative rotation range of the cutting edge portion and the grip portion can be adjusted by an extremely simple operation. It is an object of the present invention to provide scissors that can be adjusted, do not tire hands, and can significantly improve work efficiency.

[0011]

In order to solve the above problems, the present invention takes the following technical means.

That is, according to the present invention, a pair of cutting edge portions pivotally attached to each other so as to be rotatable relative to each other around a pivot axis, and a pair of cutting edges from the base ends of the cutting edges to the opposite side with the pivot axis interposed. In the scissors provided with a pair of grips that are extended and a spring that is interposed between the grips and that elastically urges the grips and the cutting edge to expand, the pivotal attachment of the grips is performed. It is characterized in that a control means for adjusting the relative rotation range of the cutting edge portion and the grip portion is provided by rotating an operating body provided near the axis.

The invention according to claim 2 of the present application is characterized in that the control means can hold the cutting edge portion in a closed state.

The invention described in claim 3 of the present application is
The control means is rotatably supported in the vicinity of the pivot shaft of the one grip portion, and has an operation body provided with a control projection at the inner end portion that projects toward the other grip portion, and the other grip portion. An engaging groove provided in the vicinity of the pivot shaft for engaging the control projection, wherein the control projection is brought into contact with the engaging groove in accordance with a selected rotational position of the operating body. In addition, a plurality of locking portions that restrict the relative rotation of the grip portion and the cutting edge portion are provided.

Further, according to the invention described in claim 4, a notch is provided in the engagement groove for releasing the restriction of the turning range of the grip portion and the cutting edge portion by allowing the control projection to escape from the engagement groove. It is characterized by the provision of a section.

[0016]

The scissors according to the present invention are provided with the control means capable of adjusting the relative rotation range of the cutting edge portion and the grip portion.

By providing the above control means, even if the operating force applied to the grip portion is released, the grip portion and the cutting edge portion will not be opened to the maximum extent.

Therefore, the opening angle of the grip portion and the cutting edge portion can be set according to the thickness of the object to be cut and the like. Therefore, it is not necessary to compress the spring that biases the grip portion more than necessary, and it is possible to reduce the fatigue of the user's fingers. Further, since the opening angle of the cutting edge portion can be made to correspond to the object to be cut, the cutting work can be performed extremely efficiently.

Further, since the openable range of the grips 5 and 6 can be set small, it is particularly convenient when used by a person with small fingers.

Further, the adjustment by the control means according to the present invention can be performed by rotating the operating body provided near the pivot shaft of the grip portion.

That is, the relative rotation range of the cutting edge portion and the grip portion can be adjusted by simply rotating the operating body to a predetermined rotation position.

Therefore, it is possible to adjust the relative rotation range of the cutting edge portion and the grip portion with one hand, and the adjustment work can be performed quickly and extremely easily.

According to a second aspect of the present invention, the control means is configured so that the cutting edge portion can be held in a closed state.

That is, by rotating the operation body to a predetermined rotation position, the cutting edge portion and the grip portion can be held in a closed state. Therefore, there is no possibility that the cutting edge portion will be chipped or the fingers will be injured during storage, and safety will be significantly improved.

In the invention according to claim 3 of the present application, the control means is rotatably supported in the vicinity of the pivot shaft of one of the grip portions, and the inner end portion projects toward the other grip portion. The control body is provided with an operating body provided with a control projection, and an engagement groove provided in the vicinity of the pivot shaft of the other grip portion and engaged with the control projection. The engagement groove is provided with a locking portion that abuts the control protrusion in accordance with the selected rotational position of the operating body and restricts a relative rotational range of the grip portion and the cutting edge portion. ing.

Therefore, by providing a plurality of the engaging portions, it is possible to set a plurality of rotation ranges of the cutting edge portion and the grip portion. For this reason, it is possible to set the opening of the cutting edge portion according to the thickness of the object to be cut, greatly improve the work efficiency, and reduce the fatigue of the user's fingers.

The invention described in claim 4 is such that the engagement between the control projection and the engagement groove described in claim 3 is released, and the same use as conventional scissors can be performed.

In the present invention, by positioning the operating body at a predetermined turning position, the engaging projection is released from the engaging groove, and the turning range of the grip portion and the cutting edge portion is regulated. A notch is provided to release it. Therefore, it is possible to use the same method as the conventional one by merely positioning the operating body at a predetermined rotation position. As a result, the present invention can be applied to various scissors.

As described above, the scissors according to the present invention can very easily adjust the relative rotation range of the cutting edge portion and the grip portion according to the user or the object to be cut, and reduce the fatigue of the user's fingers. In addition to being able to do so, the working efficiency can be greatly improved.

[0030]

Description of Embodiments Embodiments according to the present invention will be specifically described below with reference to the drawings.

FIG. 1 shows a front view of the scissors according to the present invention. In this example, the present invention is applied to shearing scissors 1 for gardening.

As shown in FIG. 1, the shearing scissors 1 according to the present embodiment has a pair of cutting edge parts 3 and 4 pivotally attached to a pivoting shaft 2 so as to be rotatable, and these cutting edge parts 3 respectively. , 4 and a pair of grip portions 5 and 6 respectively extending from the base ends of the grip portions 5 and 6 to the opposite sides with the pivot shaft 2 interposed therebetween, and the grip portions 5 and 6 are interposed between the grip portions 5 and 6. And a spring 7 for elastically urging the cutting edge portions 3 and 4 in a direction of expanding the cutting edge portions 3 and 4.

The above cutting edge portions 3 and 4 are one of the cutting edge portions 4.
However, while the cutting edge 8 is recessed in an arc shape, the other cutting edge portion 3 is provided with a cutting edge 9 that bulges in an arc shape, and a tree branch is sandwiched between these cutting edges 8 and 9. When cutting with
The branches are configured so as not to escape to the outside of the cutting edges 8 and 9.

The grip portions 5, 6 are the cutting edge portions 3, 4
The resin-made handle members 12 and 13 are integrally joined to the connecting portions 10 and 11 integrally extending from the base end portion to the side opposite to the cutting edges 8 and 9.

The one handle member 12 according to the present embodiment is formed in a ring shape having an opening 5a into which a finger can be inserted, and is structured so as not to drop when operated with one hand.

Now, the shear scissors 1 according to the present embodiment.
When the operating body 14 provided in the vicinity of the pivot shaft of the grip portions 5, 6 is rotated, the cutting edge portions 3, 4 are
Also, a control means 15 is provided which can adjust the relative rotation range of the grips 5, 6.

The control means 15 according to the present embodiment is shown in FIG.
As shown in FIG. 2 and FIG. 2, the operating body 14 is rotatably supported in the vicinity of the pivot axis of the one grip 6 and has a control projection 16 at the inner end that projects toward the other grip 5. And an engagement groove 17 which is provided in the vicinity of the pivot shaft of the other grip portion 5 and into which the control projection 16 is engaged.

As shown in FIG. 2, the operating body 14 is rotatably accommodated in an operating body accommodating hole 18 provided in one grip portion 6. A rotary shaft 20 is inserted into the central hole 19 of the operating body 14 in the central portion of the operating body accommodating hole 18.
Are integrally molded. A screw hole 21 is formed at the end of the rotating shaft 20.

A large-diameter hole 23 for accommodating the pressing body 22 is formed on the upper surface of the operating body 14, and the screw hole 21 is formed.
The operating body 14 is rotatably held by the rotating shaft 20 via a screw 24 screwed to the screw 24 and a pressing body 22 pressed by the screw 24.

A circular accommodation hole 25 for accommodating a spring washer 26 that gives a predetermined rotation resistance to the operating body 14 is formed in the lower portion of the operating body 14.

The control projection 16 is formed so as to project inward from the lower surface of the operating body 14. On the other hand, arc-shaped through holes 18 a and 11 a along the rotation locus of the control projection 16 are formed at the bottom of the operation body accommodating hole 18 so as to penetrate the handle member 13 and the connecting portion 11. Then, the control projection 16 is extended into the engagement groove 17 provided in the other connecting portion 10 via the through holes 18a and 11a.

As shown in FIG. 6, the engaging groove 17 according to the present embodiment is formed in the connecting portion 10 of the operating body 14 along the turning locus of the control projection 16. The engaging groove 17 has a first locking portion 31 capable of holding the grip portions 5, 6 and the cutting edge portions 3, 4 in a closed state, and the grip portions 5, 6 and the cutting edge portions 3, 4. And a second locking portion 32 which allows relative opening up to 15 ° and prevents further opening.

The first locking portion 31 is provided on the operating body 14
The indicator protrusion 14a formed on the upper surface of the display unit 4 shown in FIG.
The control projections 16 are formed so as to come into contact with each other when the control projections 16 are rotated to the position 0B. When the control projection 16 is locked to the first locking part 31, the cutting edge parts 3, 4 and the grip parts 5, 6 are held in a closed state.
Therefore, even if the scissors are stored or carried around in this state, there is no risk of the cutting edges 8 and 9 being chipped or the fingers or the like being injured.

When the pointing projection 14a of the operating body 14 is rotated from the state shown in FIG. 1 to the position A shown in FIG.
The control protrusion 16 is displaced to the rotation position shown in FIG. In this state, the control protrusion 16 can freely move between the position shown by the solid line in FIG. 7 and the position shown by the imaginary line.

In this embodiment, since the spring 7 elastically urges the cutting edge portion in the direction of expanding,
As shown in FIG. 5, the control projection 16 abuts the second locking portion 32 with the cutting edge portion opened by approximately 15 °, and the grip portions 5, 6 and the cutting edge portions 3, 4 further expand. Stop doing. Therefore, by rotating the operation body 14 to the rotation position shown in FIG. 4, the cutting blade portions 3 and 4 and the grip portions 5 and 6 of the scissors move from the state in which the blades are closed to 1
It can be rotated within a range of 5 °.

Furthermore, the pointing projection 14a of the operating body 14
1 is rotated from the state shown in FIG. 1 to the position C shown in FIG. 5, the control projection 16 is rotationally displaced to the position shown in FIG.

The engaging groove 17 is provided with a notch 34 for allowing the control projection 16 located at the rotating position to escape from the engaging groove 17. Therefore, when the cutting blades 3, 4 and the grips 5, 6 are opened in the above state, the engaging protrusion 16 is caused to escape from the engaging groove 17, and the cutting blades 3, 4 and the grips are gripped. The relative rotation of the parts 5 and 6 is no longer restricted. Therefore, when the operating force applied to the grips 5, 6 is released, the grips 5, 6 are released.
And the cutting edge parts 3 and 4 can be opened to the maximum extent like the conventional scissors. In this embodiment, the maximum opening angle of the cutting edge portions 3 and 4 and the grip portions 5 and 6 is set to 3
It is set to 5 °.

At the bottom of the operation body accommodating hole 18, there is provided a locking mechanism 27 for gradually locking the operation body 10.

In the locking mechanism 27 according to this embodiment, the leaf spring 29 accommodated in the spring accommodating hole 28 provided at the bottom of the operating body accommodating hole 18 and the plurality of engagements provided at the bottom of the operating body 14 are provided. It is generally constituted by the joint hole 30.

By engaging the engaging hole 30 with the leaf spring 29, the operating body 14 can be stepwise locked at a predetermined rotational position with a feeling of moderation. In the present embodiment, the engaging hole 30 displays the operating body 14 on the display unit 40.
It is provided at three places so that it can be locked at the positions A, B, and C.

As described above, in the scissors according to the present embodiment, by rotating the operating body 14 to the predetermined rotating position, the turning angle of the cutting edge portion and the grip portion is set to the predetermined rotation angle. Can be set to a value. Therefore, depending on the thickness of the object to be cut, etc., the turning range of the cutting edge is set,
The cutting work can be performed very efficiently. Further, it is not necessary to rotate the grip portions 5, 6 against the spring 7 more than necessary, and the user's hand is less tired.

In particular, when a person such as a woman with small fingers uses the scissors of this embodiment, the turning range of the grips 5 and 6 can be set to a small range, which is very convenient.

Moreover, in the present embodiment, the turning range of the cutting edge parts 3, 4 and the grip parts 5, 6 can be set only by turning the operating body 14, so that it is extremely simple. The opening range can be adjusted.

The scope of the present invention is not limited to the above embodiments. Although the present invention is applied to the shearing scissors 1 for gardening in the embodiments, the present invention can also be applied to other types of scissors, such as scissors for cutting metal or scissors for handicraft.

The shapes of the cutting edge portion and the grip portion are not limited to those in the embodiment.

The structure of the locking mechanism 27 is not limited to that of the embodiment. For example, as shown in FIG. 9, a plurality of engaging holes 36 are provided on the side surface of the operating body 14 while the grip portion is provided. It is also possible to provide a lateral hole 38 communicating with the operation body accommodating hole 18 in 13, and to press the engagement body 35 accommodated in the lateral hole 38 by the elastic force of the spring 37. It should be noted that the reference numeral 39 in FIG. 9 is a lid for backing up the spring 37.

Further, as shown in FIGS. 4 and 5, when the object to be cut is cut, in order to prevent the pair of grip portions 5 and 6 from colliding with each other by shock, the mounting surface of the spring 7 is attached. Alternatively, the cushioning member 41 may be provided.

[Brief description of drawings]

FIG. 1 is a front view of scissors according to the present invention.

FIG. 2 is a sectional view taken along line II-O-II in FIG.

FIG. 3 is a cross-sectional view of essential parts taken along the line III-III in FIG.

FIG. 4 is a plan view when the relative rotation range of scissors is set to 15 °.

FIG. 5 is a plan view when the relative rotation range of the scissors is set to 35 °.

6 is a cross-sectional view taken along line VI-VI in FIG. 2, and is an explanatory view showing a state when the scissors are held in a closed state.

7 is a cross-sectional view taken along line VI-VI in FIG. 2, and is an explanatory view when the relative rotation range of the scissors is set to 15 °.

8 is a cross-sectional view taken along line VI-VI in FIG. 2, and is an explanatory view when the relative rotation range of the scissors is set to 35 °.

9 is a cross-sectional view showing another embodiment of the present invention and is a view corresponding to FIG.

FIG. 10 is a plan view of the scissors of FIG.

FIG. 11 is a bottom view of the scissors of FIG.

12 is a rear view of the scissors of FIG.

FIG. 13 is a left side view of the scissors of FIG.

FIG. 14 is a right side view of the scissors of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shearing scissors 2 Pivoting shaft 3 Cutting edge part 4 Cutting edge part 5 Grip part 6 Grip part 7 Spring 15 Control means 16 Control projection 17 Engagement groove 31 First locking part 32 Second locking part 34 Cutout

Claims (4)

[Claims] 1. A pair of cutting edge portions pivotally attached to each other so as to be rotatable relative to each other around a pivot axis, and extended from the base ends of the cutting edge portions to the opposite side with the pivot axis interposed therebetween. The scissors provided with a pair of grips and a spring interposed between the grips and elastically biasing the grips and the cutting edge in the direction of expanding the grips are provided in the grips in the vicinity of the pivot axis. By rotating the operating body, the control means for adjusting the relative rotation range of the cutting edge portion and the grip portion is provided.
Scissors. 2. The scissors according to claim 1, wherein the control means can hold the cutting edge portion in a closed state. 3. An operating body, wherein the control means is rotatably supported in the vicinity of a pivot shaft of one of the grips, and has an inner end portion provided with a control projection protruding toward the other grip. The other grip portion is provided in the vicinity of the pivot shaft and is provided with an engagement groove with which the control projection is engaged, and the engagement groove is provided with the control portion according to a selected rotational position of the operating body. 3. The protrusion according to claim 1, wherein a plurality of locking portions for restricting relative rotation of the grip portion and the cutting edge portion are provided, and the locking portion and the cutting edge portion are provided. Scissors. 4. The engagement groove is provided with a cutout portion for allowing the control projection to escape from the engagement groove and releasing the regulation of the turning range of the grip portion and the cutting edge portion. The scissors according to claim 3.