JP3264728B2 - Cutter knife - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a quick-back type cutter knife which is used for cutting an object to be cut, such as paper, and in which the blade returns to its original position instantly when a finger is released. .

[0002]

2. Description of the Related Art Conventionally, as a cutter knife of this kind,
For example, those described in Japanese Utility Model Application Laid-Open No. 56-111970 and the like are known. The cutter knife is basically composed of a main body, a sliding body movable in the front-rear direction with respect to the main body, an elastic body which always moves the sliding body relative to the main body, and a cutter knife which moves in and out of the main body. A blade body that is capable of being connected to the sliding body;
It is composed of Thus, in such a device, when the body is gripped by hand and the sliding body is moved forward with the thumb against the elastic body, the blade body protrudes from the main body, thereby cutting the object to be cut. When the thumb is released, the sliding body is immediately moved backward by the elastic body, and the blade body is housed in the main body, which is highly safe. However, in such a device, although the amount of forward movement of the sliding member can be adjusted to adjust the amount of protrusion of the blade, the amount of protrusion of the blade cannot be adjusted accurately. For this reason, for example, when cutting corrugated paper having a predetermined thickness, it may not be possible to cut all at once.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in order to solve the problem. The object of the present invention is to accurately adjust the amount of protrusion of a blade body. There is in providing cutter knives that can do the thing.

[0004]

A cutter knife according to the present invention basically comprises a main body, a main sliding body movable in the front-rear direction with respect to the main body, and a detainer for holding the main sliding body with respect to the main body. A mechanism, a sub-sliding body movable in the front-rear direction with respect to the main sliding body, an elastic body which always moves the sub-sliding body backward with respect to the main sliding body, and a sub-sliding member capable of moving in and out of the main body in the front-rear direction. The feature resides in that the blade is connected to the moving body.

[0005]

When the main slide is moved back and forth with respect to the main body, the sub slide and the blade follow. The main sliding body is held in place by the holding mechanism. When the sub-sliding body is moved forward against the elastic body, the blade body follows. When the sub-sliding body is opened, the sub-sliding body is immediately moved backward by the elastic body, and the blade body follows. This can be achieved if the blade body projects from the main body when the sub-sliding body moves forward, and the blade body is housed in the main body when the sub-sliding body is opened. Therefore, the amount of protrusion of the blade body with respect to the main body can be accurately adjusted by moving the main sliding body back and forth with respect to the main body and holding the main slide body with the holding mechanism.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view and a cross-sectional plan view showing a stored state of a cutter knife according to a first embodiment of the present invention. FIG.
The figure similar to FIG. 1 which shows a projection state. FIG. 3 is a vertical sectional side view taken along line 3-3 of FIG. The main part of the cutter knife 1 is composed of a main body 2, a main sliding body 3, an indwelling mechanism 4, an auxiliary sliding body 5, an elastic body 6, and a blade body 7. The main body 2 forms a basic part of the cutter knife 1, and in this example, has a substantially C-shaped cross section, and has a V-shaped groove 8, a wide groove 9 continuously provided on the front side thereof, and a front side thereof. , A narrow groove 10 continuously formed at the front end, and an entrance 11 formed on the front side to allow the passage of a single blade 7
And The main slide 3 is movable in the front-rear direction with respect to the main body 2, and in this example, has a substantially T-shaped cross section, and a plate 12 positioned in the wide groove 9 of the main body 2 and a narrow width. A projecting piece 13 projecting from the groove 10, a receiving cavity 15 formed in the front half and penetrating from front to back while leaving a back wall 14, a screw hole 16 formed on the rear side, and a projecting piece 13 are formed. And a hemispherical recess 17. The retaining mechanism 4 retains the main sliding member 3 with respect to the main body 2. In this example, a screw hole 16 of the main sliding member 3 and a tightening bolt 18 screwed thereto are provided.
And a V-shaped groove 8 of the main body 2 to which the tip of the main body 2 is pressed, so-called a screw type. The sub-sliding member 5 is movable in the front-rear direction with respect to the main sliding member 3, and in this example, a substantially U-shaped tongue piece 19, a connecting projection 20 protruding from the front side thereof, and a tongue piece 19, a substantially trapezoidal operation piece 21 connected to the rear side, and a main slide 3
, The insertion piece 23 protruding from the rear side of the operation piece 21 and inserted into the housing cavity 15 of the main sliding body 3, and the slide formed on the front side of the operation piece 21. Stop irregularities 24
And a hemispherical convex portion 25 formed on the operation piece 21 and adapted to the concave portion 17 of the main sliding body 3. Elastic body 6
The sub-sliding member 5 is always moved backward with respect to the main sliding member 3. In this example, the sub-sliding member 5 is accommodated in the receiving cavity 15 of the main sliding member 3 and A compression spring is interposed between the insertion piece 23 and the compression piece 23. The blade body 7 is capable of moving in and out of the main body 2 in the front-rear direction and is connected to the sub-sliding body 5. In this example, the blade body 7 is a folding blade type having a substantially parallelogram shape and formed on the lower edge. And a connecting hole 29 formed on the rear side and connected to the connecting protrusion 20 of the sub-sliding body 5.
The concave portion 17 of the main sliding member 3 and the convex portion 29 of the sub-sliding member 5 form a temporary locking mechanism 30. The sub-sliding member 5 is separated from the main sliding member 3 by a cutting pitch (adjacent to the main sliding member 3). (Horizontal distance of the fold line 28). Next, the operation will be described based on such a configuration. When the main slide 3 is moved back and forth with respect to the main body 2 after the tightening bolt 18 of the retaining mechanism 4 is loosened, the sub slide 5 and the blade 7 follow. After the main slide 3 is moved back and forth, when the tightening bolt 18 is screwed, its tip is pressed against the V-shaped groove 8 of the main body 2 and the main slide 3 is left in place. When the main body 2 is gripped by hand and the sub-slider 5 is moved forward against the elastic body 6 with the thumb, the blade 7 follows. When the thumb is released from the sub-sliding body 5, the sub-sliding body 5 is immediately moved backward by the elastic body 6, and the blade body 7 follows. The blade body 7 projects from the main body 2 when the sub-sliding body 5 is moved forward, and the blade body 7 when the sub-sliding body 5 is opened.
This can be achieved by placing the device in such a way that it is stored in the main body 2. That is, when the sub-sliding body 5 is moved forward by the cutting pitch against the elastic body 6, the cutting body 7 protrudes from the main body 2 by the cutting pitch as shown in FIGS. At this time, since the concave portion 17 and the convex portion 25 of the temporary locking mechanism 30 are engaged, the same state can be maintained only by applying an engaging force smaller than the elasticity of the elastic body 6. When the thumb is released from the sub-sliding body 5, the blade body 7 is instantly stored in the main body 2 as shown in FIGS. At this time, the engagement between the concave portion 17 and the convex portion 25 of the temporary locking mechanism 30 is released, and the sub-sliding body 5 is moved backward. Accordingly, by moving the main sliding body 3 back and forth with respect to the main body 2 and holding the main sliding body 3 by the holding mechanism 4, the protrusion amount A of the blade body 7 with respect to the main body 2 can be accurately adjusted.

Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is different from the first embodiment in that
7 and the projection 25 are reversed,
In that a plurality of (two) convex portions 25 are formed, and the sub-sliding member 5 is engaged with the main sliding member 3 when it is moved forward by half the cutting pitch and the cutting pitch. Are different from the first embodiment.

In the above embodiment, the main body 2 does not include a grip body or a clip body. However, the present invention is not limited to this. For example, the main body 2 may include these. Detention mechanism 4
In the above embodiment, a so-called screw type was used. However, the present invention is not limited to this. For example, a step slide type described in Japanese Utility Model Publication No. 61-30609 and an auto-lock type described in Japanese Utility Model Publication No. 2-20991 may be used. good. In the above embodiment, the sub-sliding member 5 is disposed on the front side of the main sliding member 3, but is not limited to this, and may be on the rear side, for example. The elastic body 6 is a compression spring in the above embodiment, but is not limited to this, and may be, for example, a tension spring. The blade body 7 is, in the above embodiment,
The blade pitch was standard, but not limited to this.
For example, it may be half the standard.

[0009]

As described above, according to the present invention, as described above,
The following excellent effects can be obtained. (1) A main sliding body, a main sliding body, an indwelling mechanism, a sub-sliding body, an elastic body, and a blade body. Since the elastic body that always moves the sub-sliding body backward is provided, the protrusion amount of the blade body can be accurately adjusted. (2) Since the main sliding body is provided with the sub-sliding body and the elastic body, there is no need to modify the main body, and therefore, the present invention can be easily applied to existing cutter knives. (3) When a temporary locking mechanism is provided between the main sliding body and the sub-sliding body, the same state can be maintained only by applying a locking force smaller than the elasticity of the elastic body.

[Brief description of the drawings]

FIG. 1 is a front view and a cross-sectional plan view showing a stored state of a cutter knife according to a first embodiment of the present invention.

FIG. 2 is a view similar to FIG.

3 is a vertical sectional side view taken along line 3-3 of FIG.

FIG. 4 is an enlarged cross-sectional plan view of a main part showing a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cutter knife, 2 ... Body, 3 ... Main sliding body, 4 ... Detention mechanism, 5 ... Sub sliding body, 6 ... Elastic body, 7 ... Blade body, 8 ... V-shaped groove, 9 ... Wide groove, 10 ... Narrow Width groove, 11 ... Doorway, 12 ...
Plate piece, 13 ... Projection piece, 14 ... Back wall, 15 ... Housing cavity, 16 ...
Screw holes, 17 recesses, 18 bolts, 19 tongues, 2
0 ... connecting projection, 21 ... operation piece, 22 ... lumen, 23 ... insertion piece, 24 ... anti-slip unevenness, 25 ... convex part, 26 ... front wall, 27 ...
Blade, 28 ... folding line, 29 ... connection hole, 30 ... temporary locking mechanism,
A: Projection amount.

Claims (1)

(57) [Claims] 1. A main body, a main sliding body movable in the front-rear direction with respect to the main body, a retaining mechanism for retaining the main sliding body with respect to the main body, and a sub mechanism movable in a front-rear direction with respect to the main sliding body. It is characterized by comprising a sliding body, an elastic body that always moves the sub-sliding body backward with respect to the main sliding body, and a blade body that can move in and out of the main body in the front-rear direction and is connected to the sub-sliding body. Cutter knife.