JPH0521344Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a circular cutter for cutting paper, resin sheets, rubber sheets, thin wood plates, thin metal plates, etc. into circular shapes.

(Prior Art) A circular cutter that combines a main body with a cutter blade and a slider with a needle for securing the center position has been proposed. For example, JP-A-56-
Publication No. 107900 describes ``knife mainly for circular cutting''
is disclosed. This has a cutter attached to the end of a straight rod by a mounting piece projecting downward, and a slide plate is slidably inserted into the straight rod, and a fulcrum is provided on the slide plate. Further, as another conventional example, there is a circular cutter as shown in FIG. In these circular cutters, the slider body is provided with a cylindrical part having an inner hole that matches the cross-sectional shape of the body body, and is slidably inserted into the body body. When using the former circular cutting knife, check the radius value on the scale displayed on the circular cutting knife itself or other scale, and then tighten the knob/tightening screw at the top of the slide body. Therefore, by fixing the slider to the main body body, sticking the fixed needle provided at the other end of the slider body in a predetermined position of the target material, and rotating the knob/tightening screw, the cutter blade can be removed. Cutting was done by rotating. In the latter circular cutter, the slider was fixed to the main body by tightening a screw on the side of the slider.

(Problems to be solved by the invention) However, the conventional circular cutter had the following problems.

In other words, after the slider body is inserted into the main body, the screws may loosen and fall off during storage or transportation, making it inconvenient to use. Moreover, there were other problems such as the screws loosening during cutting, causing the slider to shift, causing problems in cutting. Furthermore, since the main body and slide plate were fixed in a predetermined position by tightening screws, there was a problem that the tightening operation took time and the slider plate could not be fixed quickly, especially in the case of the former. Therefore, there was a problem that the counterclockwise screw became loose and cutting could not be performed. Further, there was a problem in that a force in a sliding direction is applied to the slide plate during the screw tightening operation, causing the slide plate to be moved from a predetermined position.

Furthermore, since the cutting blade was stored separately,
There was a problem in that it was not possible to quickly replace the cutting blade due to damage or to use different cutting blades depending on the material to be cut.

This invention was made to solve these problems, and the slider may come off carelessly during storage.
The slider will not shift during cutting.
The object of this invention is to perform cutting in accordance with a predetermined circular cutting diameter value and to replace the cutting blade reliably and quickly.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a main body with a cutter blade on the head and a scale display on the surface of the body, and a needle for securing the center position on the lower part of the main body. In a circular cutter consisting of a slider whose edge is slidably gripped, a locking part is integrally formed at the end of the body tail in a direction perpendicular to the sliding direction, and the body body and the slider body are formed on the back side of the slider body. The circular cutter is characterized in that a slider fixing stopper having a wedge movable in a direction orthogonal to the sliding direction of the slider is attached between the cutters.

Further, the circular cutter is characterized in that the locking portion can be expanded and narrowed in a direction orthogonal to the sliding direction by a notch provided in the vicinity of the locking portion.

In addition, a cutter blade storage chamber is provided in the head of the main body, and a circular cutter is provided with a lid that can be opened and closed freely.

(Function) In the circular cutter of the present invention, after the locking portion is inserted into the main body body and the slider body, the locking portion protrusion prevents the slider from falling off during storage and from shifting during handling. In addition, the stopper allows the main body and slider to be fixed and unfixed with a single touch, making it quick and easy to do so.
In addition, the cutter blade storage compartment allows for quick replacement of cutter blades, making handling easier.

(Embodiment) FIGS. 1 to 6 show a first embodiment of the present invention, in which a main body 1 has a cutter blade holder 4 attached to the head thereof. The cutter blade 9 is detachable via an attachment/detachment operation screw 9a. Body portion 1a of main body 1
A scale display section 3 is provided on the surface, and the cutting diameter can be easily set according to a predetermined value while sliding a slider 10. 10d is an instruction mark attached to the slider 10 for setting the cutting diameter.

A triangular locking part 2 is formed at the tail end of the main body 1, and the main body 1 is made of an elastic synthetic resin material, and the cross section of the slider 10 is approximately the same as shown in FIG. Since the body 1 is inserted into the slider 10, the slider 10 deforms and opens, and is inserted by going over the locking part, and after being inserted, the vertical part 2b prevents it from falling off. . The slider 10 has a body portion 1 as shown in FIG.
A grip portion 10a having a U-shaped cross section is formed at 0c to slidably grip the main body portion 1a.

A stopper 11 for fixing the slider is attached to the back surface of the main body gripping part 10a, and its concrete structure is as shown in FIG. The wedge 12 is moved up and down through the . When pushed down, the wedge tip 12b fits into the narrow pocket extension 13a formed by the surface of the body body 1a, fixing the slider 10 and the body 1 by a wedge effect. The lower part 10e of the slider 10 is provided with a needle 14 for securing the center position, which is fixed because it does not need to be attached or detached.

Reference numeral 10b denotes a grip portion for rotating and rotating the needle for securing the center position during cutting. A cutter blade storage chamber 6 is formed inside the cutter blade holder 4 as shown by the dotted line in FIG.
A lid 5 that can be opened and closed is attached to the surface, and this lid 5 has a single-opening structure that opens by rotating upward via a rotation support 7 held inside the cutter blade holder 4. It is becoming. Reference numeral 8 denotes a finger hook portion formed integrally with the lid 5, and since the cutter blade holder 4 below the finger hook portion 8 is a recessed portion, the lid 5 can be lifted by hooking a finger from below. Reference numeral 8a denotes a portion that engages with the inside of the cutter blade holder 4 when the lid 5 is closed.

FIG. 7 shows a second embodiment of the present invention, in which a notch 2c is formed near the locking portion 2a. The other configurations are the same as in the first embodiment. Thereby, in order to combine and connect the main body 1 and the slider 10, the triangular locking part 2 at the end of the tail part of the main body 1 is required.
If it is fitted into the main body grip part 10a of the slider 10 while pressing down so as to narrow it, the tail end width of the main body 1 is narrowed, so that it can be smoothly combined with the slope 2a of the locking part 2. Once assembled, the vertical portion 2b of the locking portion 2 prevents the slider 10 from falling off the main body 1.

Operations according to each of the above embodiments will be explained. To cut the target material using a circular cutter,
While sliding the slider 10 along the body edge 1b of the main body 1, the scale display section 3 and the instruction mark 10d
After setting the predetermined cutting diameter with and, press stopper 1.
Fixed at 1. After fixing, the cutting blade 9 is rotated in the circumferential direction by sticking the needle 14 for securing the center position into the target material and rotating the grip portion 10b to perform cutting.

Needless to say, changing the cutting diameter can be done easily by pushing up the wedge 12 of the stopper 11 to cancel the wedge effect, and the slider 10 becomes slidable again. If the cutting blade is damaged or if a variety of cutting blades are to be used, the lid 5 can be opened via the finger hook 8 and the cutting blade can be quickly taken out and replaced.

(Effects of the invention) As described above, according to the invention, after the main body and slider are inserted, it is possible to prevent the slider from falling off during storage and from shifting during handling, and furthermore, the slider can be adjusted to a predetermined cutting diameter value. Can be fixed easily and securely with one-touch operation. Additionally, the cutting blade can be stored in the circular cutter itself, making it easier to replace the blade.

[Brief explanation of the drawing]

FIG. 1 is a rear view showing the first embodiment of the present invention;
Figure 2 is a front view, Figure 3 is an enlarged view of the cutter blade holder, Figure 4 is a right side view, Figure 5 is a sectional view of the stopper, and Figure 6 is a left side view. FIG. 7 is a rear view of the locking part according to the second embodiment of the present invention;
FIG. 8 is a perspective view showing a conventional example. 1... Main body, 2... Locking part, 5... Lid, 10...
...Slider, 11...stopper.

Claims (1)

[Claims for Utility Model Registration] 1. A main body 1 having a cutter blade 9 on the head and a scale display section 3 on the surface of the body 1a, and a needle 14 for securing the center position on the lower part 10e, which can slide on the edge 1b of the main body body. In a circular cutter consisting of a slider 10 held by a slider 10, a locking part 2 is integrally formed on the tail end of the main body 1 in a direction perpendicular to the sliding direction, and a main body 1a and a slider body are formed on the back side of the slider body 10c. 10c, a circular cutter is provided with a slider fixing stopper 11 having a wedge 12a that is movable in a direction orthogonal to the slider sliding direction. 2. The circle described in claim 1 of the utility model registration claim, characterized in that the locking part 2 is made widenable in a direction orthogonal to the sliding direction by a notch 2c provided in the vicinity of the locking part 2. Cut cutter. 3. The circular cutter described in Claim 1 of the Utility Model Registration Claim, in which a cutter blade storage chamber 5 is provided in the main body head 4, and a lid that can be opened and closed is attached to the cutter storage chamber 5.