JPH09285654A - Cutter - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: It is difficult to confirm the direction of the cutting edge when the projection amount of the cutting edge is small, although the projection amount of the cutting edge can be adjusted according to the thickness of an object to be cut. It was When the cutting operation is started without confirming the direction of the cutting edge, the cutting edge may be broken. That is when the cutting edge is oriented in a direction different from the cutting direction. Specifically, when cutting is started, the blade edge has already pierced the object to be cut, for example, the paper surface. Here, if the cutting edge is oriented in the cutting direction, it can be smoothly cut, but for example, if the cutting edge is oriented in a direction perpendicular to the cutting direction, the cutting edge has already pierced the paper surface. Therefore, it can not be rotated and it can not be cut, and these exert an excessive force on the blade edge,
Eventually, it would break. A cutter having a cutter blade rotatably provided inside a holder, wherein the cutter blade is arranged so as to be vertically movable with respect to the holder, and the cutter blade is vertically moved. , Cutter-A cutter made by contacting or not contacting the tip of the blade with the cut object.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutter having a cutter blade rotatably provided inside a holder.

[0002]

2. Description of the Related Art As an example of a cutter in which a cutter blade is rotatably provided inside a holder, an actual fair 2-256
No. 60 publication. And, the gist is that "a rear shaft portion with a tip metal is rotatably fitted to the rear end of the front shaft portion equipped with a writing body such as a sharp pencil and a ball pen on the front portion. The inner cylinder, which has an axial slit on the side wall, is installed in the inner hole from the front to the front shaft, and the magnet is attached to the tip of the inner cylinder and the projection provided on the side edge penetrates through the slit of the inner cylinder. Insert the feeding device fitted into the groove of the spiral cylinder fixed to the inner surface of the shaft part, fix the pipe body to the tip opening of the tip metal, and at the inner hole of the pipe body round bar shape with a sharp rear end. The cutter-equipped writing instrument has a cutter slidably inserted therein, and its rear end is brought into point contact with the magnet so as to be attracted and held at the same portion. That is, depending on the thickness of the object to be cut,
The amount of protrusion of the blade edge of the cutter can be adjusted, and the amount of protrusion is adjusted by a spiral structure.

[0003]

However, in the above-mentioned prior art, although the amount of protrusion of the cutting edge can be adjusted according to the thickness of the object to be cut, when the amount of protrusion of the cutting edge is small, It was difficult to confirm the direction of the cutting edge.
When the cutting operation is started without confirming the direction of the cutting edge, the cutting edge may be broken. that is,
This is when the cutting edge is oriented in a direction different from the cutting direction. Specifically, when you start disconnecting,
The cutting edge is stuck into the object to be cut, for example, the paper surface.
Here, if the cutting edge is oriented in the cutting direction, it can be smoothly cut, but for example, if the cutting edge is oriented in a direction perpendicular to the cutting direction, the cutting edge has already pierced the paper surface. Therefore, the blade cannot be rotated and cannot be cut, and an excessive force acts on the blade edge by these, and the blade is finally broken.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a cutter is provided inside a holder.
A cutter rotatably provided with a blade, wherein the cutter blade is arranged so as to be movable up and down with respect to a holder, and the vertical movement of the cutter blade causes cutting of the tip of the cutter blade to a cutting object. The main point is that the contact and non-contact are performed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first example will be described with reference to FIGS. It is a cutting tool in which one cutter and two ball pens are slidably arranged. Instead of two ball pens, a combination of one ball pen and a sharp pencil may be used, and two cutters and two balls may be used.
The number may be appropriate, as in the case of a rupen. Reference numeral 1 is a shaft main body, and the shaft main body 1 is composed of a front shaft 2 and a rear shaft 3. Further, in this example, the front shaft 2
Is constituted by a threaded structure of the tip member 4 and the center shaft 5, but may be a means such as press fitting or fitting, or may be integrally formed.

The rear shaft 3 has three slits 6 formed in its longitudinal direction up to the end. In this example,
Three slits 6 are formed, but one cutter
This is because there are a total of three ball pens that are cursives, and the number of slits also changes depending on the number of cutters and cursives. The slit 6 is formed up to one end of the rear shaft 3, and sliding grooves 7 are formed on both sides in the longitudinal direction of the slit 6. But,
The sliding groove 7 is not formed over the entire length of both sides of the slit 6, but is formed only up to the middle portion. A leg portion 8 is formed in front of the rear shaft 3. The leg portion 8 is formed by forming the slit 6 to the end portion. Therefore, the number of legs 8 also changes depending on the number of cursive letters. The lengths of the legs 8 are not the same but different. Specifically, the two legs 8 are formed shorter than the other one. Rear axle 3 Middle axle 5
It was designed to be easy to assemble. Reference number 9
Is a clip portion formed on the side surface of the rear shaft 3.

In the slit 6 of the rear shaft 3, a cutter (moving member) 11 having a concave-convex portion 10 formed at a portion where a finger comes into contact, and a slider 12 for moving a ball pen are shown. , 13 are slidably arranged. Sliding projections 14 are formed on both sides of the sliders 11 to 13 in the longitudinal direction, and slidably engage with the sliding grooves 7 formed in the slits 6. Two releasing projections 15 and 16 are formed on the back surface of each of the sliders 11 to 13 with a space therebetween, and
A cutter 17 is detachably press-fitted and fixed to the front end of the. On the other hand, a ball-pen 18 which is a cursive body is press-fitted and fixed to the front ends of the other two sliders 12 and 13, respectively.

Reference numeral 19 is an elastic member such as a coil spring for biasing the cutter 17 and the ball pen 18 and the sliders 11 to 13 connected to the cutter and the cursive body to the rear. However, the sliders 11 to 13 are biased rearward by locking one end of the elastic member 19 to the regulating portion 20 formed at the intermediate portion of the center rod 5. Further, in this example, the front member 4 which is one member of the front shaft 2 is detachably fixed to the center shaft 5 by screwing, but the cutter 17 and the ball pen 18 are replaced. This is because the ease of molding is taken into consideration, and the tip member 4 and the center shaft 5 may be integrally molded.

Next, the cutter 17 will be described (see FIG. 4). At the front end of the slider 11, there is a rear end of a shaft 21 made of a flexible material made of metal such as brass, stainless steel, aluminum or the like, or resin such as polypropylene, polystyrene, polybutylene terephthalate. It is fixed by press fitting. And at the front end of the shaft 21,
The cutter mechanism 22, which is a feature of the present invention, is detachably fixed. The cutter mechanism 22 is basically composed of a holder 23, a cutter blade 24 and a tail plug 25 which are rotatably and vertically movable in the holder 23.

Inside the holder-23, from above,
A large diameter hole portion 26, a small diameter hole portion 27, and a medium diameter hole portion 28 having a smaller diameter than the large diameter hole portion 26 and larger than the small diameter hole portion 27 are formed. A pipe S made of stainless steel or the like having an inner diameter that is the same as or slightly smaller than that of the small-diameter hole 27 is attached to the medium-diameter hole 28. Cutter blade 2
The rotation resistance of No. 4 was suppressed as much as possible to enable smooth rotation. The cutter blade 24 has a large diameter portion 29.
And a small-diameter portion 30 having substantially the same diameter as the inner diameter of the pipe S and a blade portion 31 are formed. The lower end of the large-diameter portion 29 of the cutter blade 24 is locked to the upper end of the small-diameter portion 27 of the holder 23, so that the holder 23 of the cutter blade 24 is
Is prevented from falling downward. Also, the tail plug 25
Includes a press-fitting portion 32 that is press-fitted into the lower end of the shaft 21, a spiral portion 33 having a spiral groove formed on the outer periphery of the spiral groove that engages with the holder 23, and a conical portion 34 at the lower end of the spiral portion 33. Has been formed. The upper end surface of the cutter blade 24 has a conical portion 3
By making contact with the top of No. 4, the cutter blade 24 was made to rotate easily. Furthermore, the conical portion 3 of the tail plug 25
Between the top of No. 4 and the upper end surface of the cutter blade 24, there is a gap X formed when not cutting. The set amount of the gap X determines the protruding amount of the blade portion 31 from the holder 23 at the time of cutting, that is, the amount by which the direction of the blade portion 31 can be visually confirmed.

Next, an example of use will be described. From the state shown in FIG. 1, the slider 11 interlocked with the cutter 17 is pressed forward (downward in the drawing). By this pressing operation, the slider 11 is moved forward while being guided by the slit 6 and the sliding groove 7, and is eventually pushed into the inside of the barrel body 1 and is slid on the side surface of the slider 11. The rear end of the protrusion 14 engages with the step 7a at the front end of the sliding groove 7,
Prevents the retracting action of the cutter 17. That is, by forming the sliding groove 7 only up to the middle portion of the slit 6, the slider 11 is also engaged. At this time, the holder 23 of the cutter 17 and the blade 31
Protrudes from the tip of the shaft body 1 (see FIG. 5).

Here, the direction of the blade portion 31 of the cutter blade 24 is confirmed, and the shaft body 1 is rotated so that the direction of the blade portion 31 matches the cutting direction. Then the cutter
When the blade portion 31 of the blade 24 is brought into contact with the paper surface P to be cut, the setting of the gap X causes the cutter 24 to relatively rise. Here, when the shaft main body 1 is further pressed against the paper surface P, the blade portion 31 abuts on the top of the conical portion 34 of the tail plug 25 until the front end surface of the holder 23 abuts on the paper surface P. Cut into the paper P (see FIG. 6). In the case of the illustrated example, the blade portion 3 is arranged so that only one sheet on the uppermost sheet surface is cut.
Although the protrusion amount of 1 is set, it is not limited to this and can be set appropriately. Next, when the shaft body 1 is moved in the cutting direction, the cutting by the blade portion 31 is started, and when the cutting direction is changed, the cutter blade 24
Also rotates in the direction to cut.

Next, when the cutter 17 is to be housed in the shaft body 1, the other sliders 12 and 13 are pressed. When another slider, for example, slider-12 is pressed,
Release protrusion 1 formed on the back surface of the slider-12
6 collides with the release protrusion 15 of the slider-11. This collision action causes the slider to be pressed.
1 is pushed outward of the barrel main body 1. By this pressing action, the engagement between the sliding protrusion 14 of the slider 11 and the step portion 7a of the sliding groove 7 is released, and the cutter 17 in the protruding state is released by the releasing action. It is retracted by the action of 19 and is immersed in the shaft body 1.

FIG. 7 is a diagram showing a second example, which differs from the first example in the method of urging the cutter blade 24 downward. That is, in the first example, the cutter blade 24 is urged downward by its own weight, but in the second example, the cutter blade 24 is urged downward by an elastic member such as a coil spring. . More specifically, the conical portion of the first example is a separate member in the second example, and the conical member 35 and the tail plug 2 are provided.
An elastic member 36 is stretched between the front end portion 5 and the front end portion 5.
Then, since the conical member 25 is biased downward by the resilient member 36, the cutter blade 24 is also biased downward. In this way, by biasing the cutter blade 24 with an elastic member or the like, it is possible to cut only one of a plurality of overlapping sheets depending on how the elastic force of the elastic member 36 is set. It is also possible to prevent the cutter blade from touching (due to the gap X) when carrying the device. The action is that when the blade portion 31 is brought into contact with the paper surface P, the cutter blade 24
Is substantially the same as that of the first example, except that is relatively increased against the biasing force of the elastic member 36.

[0015]

The present invention is a cutter having a cutter blade rotatably provided inside a holder, wherein the cutter blade is arranged so as to be movable up and down with respect to the holder. The vertical movement of the blade causes the cutter to contact the cutting edge of the blade,
Since it is made by non-contact, the direction of the cutter blade can be sufficiently confirmed before cutting, and therefore the cutter blade is not broken.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a first example of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a view on arrow B of FIG.

FIG. 4 is an enlarged view of part C in FIG.

FIG. 5 is a vertical cross-sectional view showing a usage state of the first example.

FIG. 6 is a vertical cross-sectional view showing a usage state of the first example.

FIG. 7 is an enlarged view of a portion D in FIG. 6;

FIG. 8 is an enlarged vertical sectional view of an essential part showing a second example of the present invention.

[Explanation of symbols]

 1 Axis Main Body 2 Front Axis 3 Rear Axis 4 Tip Member 5 Middle Axis 6 Slit 7 Sliding Groove 8 Leg 9 Clip Part 10 Concavo-convex Part 11 Slider-12 Slider-13 Slider-14 Sliding Protrusion 15 Release Protrusion 16 Release Protrusion 17 Cutter -18 ball pen 19 elastic member 20 regulation part 21 shaft 22 cutter mechanism 23 holder 24 cutter blade 25 tail plug 26 large diameter hole portion 27 small diameter hole portion 28 medium diameter hole portion 29 large diameter portion 30 small diameter portion 31 Blade part 32 Press-fitting part 33 Spiral part 34 Cone part 35 Cone member 36 Repellent member X Gap P Paper surface S Pipe

Claims (1)

[Claims] 1. A cutter comprising a cutter blade rotatably provided inside a holder, wherein the cutter blade is vertically movable with respect to the holder, and the cutter blade is vertically movable. Is a cutter characterized in that the tip of the cutter blade is brought into contact with or not brought into contact with a cut object.