JPH08842A - Breakable blade type cutter with failure preventive device - Google Patents

Abstract

PURPOSE:To provide a cutter with a failure preventive device with which a breakable blade plate and a rear sheet metal are projectable and housable together out of and into a gripping handle and only the rear sheet metal is slidable relative to the breakable blade plate when needed. CONSTITUTION:The gripping handle of this breakable blade type cutter is freely drawably provided with the breakable blade plate 3 installed with a sliding body 6 at the rear end at the gripping handle 4. This sliding body 6 is provided with a fixing device for fixing the breakable blade plate 3 to the gripping handle 4 at a desired projecting length. The folded back rear sheet metal 9 is freely slidably fitted to the rear side of the breakable blade plate 3. The sliding body 6 or the folded back rear sheet metal 9 is provided with a connecting mechanism A for sliding and moving together the folded back rear sheet metal 9 according to the sliding movement of the breakable blade plate 3. The connecting force of this connecting mechanism A is set at the intensity at which the breakable blade plate 3 and the folded back rear sheet metal 9 are slidable and movable together and at the weakness at which only the folded back rear sheet metal 9 is slid and moved by pushing relative to the breakable blade plate 3 when the breakable blade plate 3 is pressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding blade type cutter with a breakage preventing device which can be used in a state in which a folding blade plate projecting longer than a grip handle is difficult to break.

[0002]

2. Description of the Related Art The inventor of the present invention inserts a thin folding blade plate into a folding blade plate insertion portion of a grip handle as shown in Japanese Utility Model Publication No. 2-31109 and pulls it out. Folding blade type cutter that slides the folding blade plate into the folding blade plate insertion part with a slide body or fixes it to the handle with a fixing device, and attaches the folded back metal plate closely to the upper back edge of the folding blade plate And a cutter with a breakage prevention device that fits in such a way that it can slide against the pressing blade against the pressing force and prevents the bending of the blade when it is used by projecting the blade into a long width. Is devising.

However, since the folding blade plate and the back metal plate are slid separately, when they are used, it is necessary to project the folding blade plate and then further project the folding back metal plate.
In addition, when the folding blade plate and the back metal plate are stored in the handle, the folding blade plate and the back metal plate must be stored separately, which is very troublesome.

The present invention has found out such a problem, and the folding blade plate and the back metal plate can be integrally projected and stored from the handle, and if necessary, the back metal plate can be attached to the back metal plate. It is intended to provide a folding blade type cutter with a breakage prevention device that can also slide only.

[0005]

The gist of the present invention will be described with reference to the accompanying drawings.

Folding blade plates 3 having a plurality of folding line grooves 2 arranged side by side at appropriate intervals on the side surface of the thin blade plate are provided in a folding blade plate insertion portion 5 formed on a handle 4 so as to be freely drawn out. A slide body 6 projecting in a fixed state is slidably provided in a slide opening 7 on the side surface of the handle 4, and the slide plate 6 is provided with the tip of the blade plate 3 pulled out from the handle 4 3 is provided with a fixing device 8 for fixing the handle 3 to the handle 4, and the folding blade plate 3
In the folding blade type cutter in which the folding back metal plate 9 that makes it difficult to fold the folding blade plate 3 is fitted along the back upper edge of the folding blade plate 3, the folding back metal plate 9 Is attached to the folding blade plate 3 by a suction mechanism, a locking connection or a pressure contacting mechanism, and a connecting mechanism A that allows the folding back plate 9 to slide together with the sliding movement of the folding blade plate 3 is fixed to the folding blade plate 3. Provided directly on the body 6 or the folded back metal plate 9,
When the folding blade plate 3 is slid by the suction coupling force, the locking coupling force, or the pressure contact coupling force of the coupling mechanism A, the folding back metal plate 9 slides together with the folding blade plate 3. The strength is obtained, and is set to be weak so that the folding back plate 9 can be pushed and slid with respect to the folding blade plate 3 when the folding back plate 9 is pushed by pressing the folding blade plate 3. The present invention relates to a folding-blade type cutter with a breakage prevention device.

Further, a plurality of folding blade plates 3 are provided side by side on the side surface of the thin blade plate with a plurality of folding line grooves 2 arranged at appropriate intervals so that they can be drawn out into a folding blade plate insertion portion 5 formed on a handle 4. A slide body 6 projecting in a fixed state from the plate 3 is slidably provided in a slide opening 7 on the side surface of the handle 4, and the slide body 6 is folded with the tip of the folding blade plate 3 pulled out from the handle 4. Blade 3
A fixing device 8 capable of fixing the folding handle 3 to the handle 4 is provided, and a folding back metal plate 9 for making it difficult to fold the folding plate 3 is provided on the upper edge of the folding plate 3 on the back side. In the folding blade type cutter slidably fitted along the folding back metal plate 9, the folding back metal plate 9 is attracted and coupled, and the folding back metal plate 9 can slide together with the folding movement of the folding blade plate 3. The suction connecting mechanism A1 consisting of is provided on the slide body 6 fixed to the folding blade plate 3, and when the suction connecting force of the suction connecting mechanism A1 consisting of the magnetic body 10 is slid and moved,
The folding blade plate 3 has such a strength that the folding back metal plate 9 can slide together with the folding blade plate 3, and the folding blade plate 3 is pressed when the folding back plate 9 is pushed. The folding back metal plate 9 is set to have a weakness such that the folding back metal plate 9 can be pushed and slid and moved.

Further, a plurality of folding blade plates 3 having a plurality of folding line grooves 2 arranged side by side at an appropriate interval on the side surface of the thin blade plate are provided in a folding blade plate insertion portion 5 formed on a handle 4 so as to be freely drawn out. A slide body 6 projecting in a fixed state from the plate 3 is slidably provided in a slide opening 7 on the side surface of the handle 4, and the slide body 6 is folded with the tip of the folding blade plate 3 pulled out from the handle 4. Blade 3
A fixing device 8 capable of fixing the folding handle 3 to the handle 4 is provided, and a folding back metal plate 9 for making it difficult to fold the folding plate 3 is provided on the upper edge of the folding plate 3 on the back side. In a folding blade type cutter slidably fitted along the folding back metal plate 9, the folding back metal plate 9 is locked and coupled so that the folding back metal plate 9 can slide together with the sliding movement of the folding blade plate 3. Connection mechanism A2
Is provided on the slide body 6 fixed to the folding blade plate 3, and when the locking coupling force of the locking coupling mechanism A2 is slid to move the folding blade plate 3, it becomes integral with the folding blade plate 3. The folding back metal plate 9 has such strength that the folding back metal plate 9 can slide together, and when the folding back plate 9 is pushed by pressing the folding blade plate 3, the folding back metal plate 9 is pushed against the folding blade plate 3. The folding blade type cutter with a breakage preventing device according to claim 1, wherein the weakness is set so that the push-motion sliding movement is possible.

[0009]

When the fixing device 8 releases the fixing of the folding blade plate 3 and pushes the slide body 6, the folding blade plate 3 is slid along the folding blade plate insertion portion 5 and protrudes from the handle 4 to be connected. Since the folding back metal plate 9 is attached to the folding blade plate 3 by suction, locking, or pressure contact by the mechanism A, the folding back metal plate 9 protrudes as a unit while being fitted to the folding blade plate 3, When the folding blade plate 3 is pushed into the blade plate insertion portion 5, the folded back metal plate 9 is housed in the handle 4 together with the folding blade plate 3. At this time, the folding blade plate 3 is fixed by the fixing device 8 with an arbitrary protruding width.

The connecting mechanism A has such a weak connecting force as to push the folding back plate 9 against the folding plate 3 by pressing the folding plate 3 and pushing the folding back plate 9. Since only the folding back metal plate 9 can be slid with respect to the folding blade plate 3 as required, the folding line groove 2 of the folding blade plate 3 is projected from the tip of the folding back metal plate 9 when in use. The folding back plate 9 can be slid in such a state that the folding blade plate 3 is prevented from being broken from the folding groove 2, and the folding groove of the folding portion of the folding blade plate 3 when the folding blade plate 3 is broken. Folded back metal plate 9 so that 2 projects from the tip of folded back metal plate 9
It is also possible to slide and move the folding blade plate 3 with respect to the folding blade plate 3 so that the broken portion of the folding blade plate 3 can be broken along the folding line groove 2.

[0011]

1 to 3 show a first embodiment.

In this embodiment, a metal plate is formed on the inner surface of the groove of the handle 4.
A folding blade plate 3 having a slide body 6 connected to a rear end thereof is slidably inserted into a folding blade plate insertion portion 5 provided with 11, and the folding blade plate 3 is desired for the grip handle 4 on the sliding body 6. The present invention is applied to a folding blade type cutter provided with a fixing device 8 that can be fixed to the protruding length, and a folding back metal plate 9 for preventing the folding blade plate 3 from being broken is provided at the back side upper edge of the folding blade plate 3. The folding blade plate 3 is fitted along the upper edge of the folding blade plate 3 so as to be slidable so that the folding blade type cutter is provided with a breakage prevention device.

In the fixing device 8 shown in the figure, a female screw hole 15 is provided in the slide body 6, and a knob 12 formed by projecting a male screw 17 at a lower portion of a circular disk 16 is screwed into the female screw hole 15. By simply rotating the circular disc 16 to bring the tip of the male screw 17 screwed into the female screw hole 15 into contact with the metal plate 11, the folding blade plate 3 with respect to the handle 4 is formed. Temporarily fixed, circular disc
By turning 16 in the opposite direction and releasing the tip of the male screw 17 from the metal plate 11, the fixing is released, and the folding blade plate 3 is attached to the grip handle 4.
Has adopted a structure that can slide. Fixing device 8
Is configured to fix only the folding blade plate 3, but may be configured to fix the folding blade plate 3 and the folding back metal plate 9 at the same time.

Reference numeral 18 in the drawing denotes a locking step portion which is locked to the rear end surface of the slide body 6 to prevent the folded back metal plate 9 from falling off from the tip side of the folding blade plate 3.

In this embodiment, the folding blade type cutter with a breakage preventing device constructed as described above is connected to the folding back metal plate 9 so that the folding back metal plate 9 is moved together with the sliding movement of the folding blade plate 3. This is a case where the suction coupling mechanism A1 of the suction coupling method using the magnetic body 10 is provided as the coupling mechanism A capable of sliding movement.

Specifically, a permanent magnet 10 is attached as a magnetic body 10 to the side surface of the base of the slide body 6 connected to the rear end of the folding blade plate 3 in the vicinity of the folded back metal plate 9, and the permanent magnet 10 is attached.
With the structure in which the folded back metal plate 9 and the slide body 6 are attracted and connected by the magnetic attraction of 10, the magnetic attraction of the permanent magnet 10 is transferred to the folding blade plate 3 when the folding blade plate 3 is slid and moved. The folding back metal plate 9 has such a strength that the folding back metal plate 9 can slide together, and when the folding back plate 9 is pushed by pressing the folding blade plate 3, the magnetic attraction of the permanent magnet is increased. On the other hand, the folding back metal plate 9 is set to have a weakness such that it can push and slide with respect to the folding blade plate 3.

Therefore, only by pushing the slide member 6 to cause the folding blade plate 3 to project and slide, the magnetic attraction of the permanent magnet 10 causes the folding back metal plate 9 to slide together with the folding blade plate 3 being fitted. This means that the folding blade plate 3 and the folding back metal plate 9 are similar to those of the conventional folding blade type cutter with a breakage prevention mechanism.
It is not necessary to individually slide and to move the folding blade plate 3 by retracting the slide body 6 and slidingly moving the folding blade plate 3 even during storage, so that the folding blade plate 3 and the folding back metal plate 9 are integrated. It will be slid and stored.

When folding the folding blade plate 3 from the folding line groove 2, the folding blade plate 3 is pressed by hand and the folding line groove 2 of the folding portion of the folding blade plate 3 is at least from the tip of the folding back metal plate 9. The folding back metal plate 9 is slidably moved with respect to the folding blade plate 3 so as to project, and the folding blade plate 3 is broken from the projecting folding groove 2.

As described above, the permanent magnet 10 is simply provided on the side surface of the slide body 6 which is close to the folded back metal plate 9, and the folded back metal plate 9 is attracted. It has an excellent structure that does not apply a force, and by changing the size of the permanent magnet 10, it is possible to freely set the magnetic attraction.

In this embodiment, the permanent magnet 10 is used as the magnetic body 10. However, the slide body 6 is formed as a plastic magnet integrally formed by mixing magnetic iron powder such as ferrite with resin. Alternatively, the magnetically folded back metal plate 9 may be attracted to the folding blade plate 3.

4 to 6 show a second embodiment.

In this embodiment, a folding blade type cutter with a breakage preventing device having the same structure as that of the first embodiment is connected with a folding back metal plate 9 and is folded back together with the sliding movement of the folding blade plate 3. This is a case where a locking coupling mechanism A2 of a locking coupling system using a locking body 20 having a bending elasticity is provided as the coupling mechanism A capable of slidingly moving the metal plate 9.

Specifically, a guide tube portion 13 into which the folded back metal plate 9 is slidably fitted is provided on the upper portion of the slide body 6, and when the folded back metal plate 9 is fitted into the guide tubular portion 13, The folded back metal plate 9 located on the slide opening 7 side of the handle 4 is formed with a wavy engaging portion 19 of a predetermined length at the lower edge of the hanging back metal plate 9. The guide engaging portion 19 is below the guide tubular portion 13 and also the guide tubular portion.
A gap 14 is formed below the corrugated engaging portion 19 of the folded back metal plate 9 fitted in the gap 13, and an inverted V having a bending elasticity is formed in the gap 14.
The character-shaped locking body 20 is disposed and fixed so that the bent protrusion on the upper side of the locking body 20 and the predetermined concave portion of the wavy engaging portion 19 of the folded back metal plate 9 can be engaged and locked. And the folding back metal plate 9 and the slide body 6 are locked and connected by the locking force of the locking body 20 to the wavy engaging portion 19, and the flexural elasticity of the locking body 20 is When the slide body 6 is slid, the bent back metal plate 9 can slide together with the slide body 6 in a state where the bent protruding portion of the locking body 20 is projected and locked in the concave portion of the wavy engaging portion 19. When the folding blade plate 3 is pressed and the folding back metal plate 9 is pushed, the locking body 20 is bent and the upper bent protrusion ticks the engaging position of the wavy engaging portion 19. Is set so that the folding back metal plate 9 can be pushed and slid to move with respect to the folding blade plate 3.

Therefore, only by pushing the slide body 6 and causing the folding blade plate 3 to project and slide, the wavy engaging portion of the locking body 20 can be obtained.
The folding back metal plate 9 also slides together while being fitted to the folding blade plate 3 due to the locking force to 19, which is similar to the conventional folding blade type cutter with a breakage prevention mechanism as in the first embodiment. The folding blade plate 3 and the folding back metal plate 9 do not need to be individually slid and moved. Further, even when the folding blade plate 3 is retracted, the slide body 6 is pulled back and the folding blade plate 3 is slid and moved. And the folded back metal plate 9 are slid together and housed.

When the folding blade plate 3 is to be folded from the folding line groove 2, the folding blade plate 3 is pressed by hand and folded back at least from the tip of the folding back metal plate 9 as in the first embodiment. The folding back metal plate 9 is slidably moved with respect to the folding blade plate 3 so that the folding line groove 2 of the take-out portion is projected, and the folding blade plate 3 is broken off from the projecting folding line groove 2.

Also in this embodiment, the corrugated engaging portion 19 is simply formed on the folded back metal plate 9, and the slide body 6 is provided with the locking body 20 for engaging and locking the corrugated engaging portion 19. It has a very simple structure that locks and connects the back metal plate 9 by
Similar to the first embodiment, it has an excellent structure that is easy to manufacture and does not require manufacturing cost.

FIG. 7 illustrates a third embodiment.

In this embodiment, the folding back metal plate 9 is connected to a folding blade type cutter with a breakage preventing device similar to that of the first embodiment, and the folding back metal plate 9 is joined together with the sliding movement of the folding blade plate 3. 9 is a case where the pressure contact connecting mechanism A3 of the pressure contact connecting type capable of sliding movement is directly provided on the folding back metal plate 9.

Specifically, as shown in FIG. 7, the left and right hanging parts of the folded back metal plate 9 are slightly bent toward the inside of each other, and the tips of the left and right hanging parts of the folding blade plate 3 are formed. The left and right surfaces are sandwiched so as to have a facing width that enables pressure contact connection.

That is, when the folding blade plate 3 is moved by the pressure contact connecting force of the sandwiching tip portion of the folding back metal plate 9, the folding back metal plate 9 also moves together, and the folding blade plate 3 is pressed to return the folding back metal plate. When the plate 9 is moved, the folding back plate 9 can be slid with respect to the folding blade plate 3.

When a resin or the like is attached to the inner side surface of the holding tip portion of the folded back metal plate 9, the folded back metal plate 9 becomes slippery with respect to the folding blade plate 3, and the surface of the abutting blade plate 3 is also scratched. Is less likely to stick.

In this embodiment, the left and right hanging parts of the folded back metal plate 9 are simply bent, and the tips of the left and right hanging parts are bent blade plates 3.
Since it has a structure in which the left and right surfaces of the two are opposed to each other so that they can be pressed against each other, it is an excellent structure that can be manufactured very easily and does not require manufacturing cost.

The connecting mechanism A of the present invention is not limited to the structures of the first, second and third embodiments described in detail, and the connecting force of the folding back metal plate 9 is the folding blade plate. 3 has a strength such that the folding back metal plate 9 can slide together with the folding blade plate 3 when the sliding movement is made, and the folding back metal plate 9 is pressed to move the folding back metal plate 9. Any structure may be used as long as it can be set to a weakness that allows the folding back plate 9 to be pushed and slid with respect to the folding blade plate 3 when pushed.

[0034]

Since the present invention is constructed as described above, the folded back metal plate is suction-connected, locked-connected or pressure-contacted to the folding blade plate by the connecting mechanism, and the folding back plate is projected and the storage slide is moved. Since the sliding movement of the folding blade plate and the folding back metal plate can be performed with one touch, it is very convenient, and the coupling force of this connecting mechanism holds the folding blade plate to hold the folding back metal plate. It is necessary even though the folding blade plate and the folding back metal plate slide together with the folding blade plate because it is weak enough to push and slide the folding back metal plate against the folding blade plate when pushed. According to the above, the cutter with the breakage prevention device can be pushed and slid only with respect to the folding blade plate and can be slid and moved, which is extremely practical.

In addition, a suction coupling mechanism using a magnetic material, a locking coupling mechanism using a locking body having a flexural locking force, and the left and right folding back lower ends of the folding back metal plate sandwich the folding blade plate. If a folding blade plate and a folding back metal plate are configured to slide together by adopting a simple coupling mechanism such as a pressure welding coupling mechanism, the manufacturing will be extremely easy and the manufacturing cost will not be high. It becomes a folding blade type cutter with a breakage prevention device with a different structure.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment.

FIG. 2 is a perspective view of the first embodiment.

FIG. 3 is an enlarged cross-sectional view of the first embodiment.

FIG. 4 is an enlarged explanatory perspective view of a main part of the second embodiment.

FIG. 5 is a perspective view of the second embodiment.

FIG. 6 is an enlarged sectional view of a second embodiment.

FIG. 7 is an enlarged sectional view of a main part of the third embodiment.

[Explanation of symbols]

 A Connecting mechanism A1 Adsorption connecting mechanism A2 Locking connecting mechanism 2 Folding line groove 3 Folding blade plate 4 Grip handle 5 Folding blade plate insertion part 6 Slide body 7 Sliding opening 8 Fixing device 9 Folding back metal plate 10 Magnetic material

Claims (3)

[Claims] 1. A folding blade plate having a plurality of folding line grooves arranged side by side at appropriate intervals on the side surface of the thin blade plate is provided in a folding blade plate insertion portion formed on a handle so as to be freely drawn out, and is fixed to the folding blade plate. The slide body protruding from the slide handle is slidably installed in the slide opening on the side of the handle, and the folding blade plate can be fixed to the handle with the tip of the blade plate pulled out from the handle. A device provided with a folding blade type cutter in which a folding back metal plate that makes it difficult to fold the folding blade plate on the back side upper edge of the folding blade plate is slidably fitted along the back side upper edge of the folding blade plate, The above-mentioned slide fixed to the folding blade plate has a connection mechanism by which the folding back metal plate can be suction-connected, locked, or pressure-contacted so that the folding back metal plate can slide together with the sliding movement of the folding blade plate. Installed directly on the body or folded back metal plate, the suction of this connecting mechanism When the folding blade plate is slidably moved by the wearing coupling force, the locking coupling force, or the pressure contact coupling force, the folding back plate has a strength with which the folding back plate can slide together with the folding blade plate, and A folding blade type cutter with a breakage prevention device, characterized in that the folding back plate is set to a weakness that can push and slide the folding back plate against the folding plate when the folding back plate is pressed and pushed. . 2. A folding blade plate, in which a plurality of folding line grooves are juxtaposed at appropriate intervals on a side surface of the thin blade plate, is provided in a folding blade plate insertion portion formed on a handle so as to be freely drawn out, and is fixed to the folding blade plate. The slide body protruding from the slide handle is slidably installed in the slide opening on the side of the handle, and the folding blade plate can be fixed to the handle with the tip of the blade plate pulled out from the handle. A device provided with a folding blade type cutter in which a folding back metal plate that makes it difficult to fold the folding blade plate on the back side upper edge of the folding blade plate is slidably fitted along the back side upper edge of the folding blade plate, An adsorption connection mechanism made of a magnetic material, which is capable of adsorbingly connecting the folded back metal plate and allowing the folded back metal plate to slide together with the sliding movement of the folding blade plate, is attached to the slide body fixed to the folding blade plate. It is provided, and the suction connection force of the suction connection mechanism made of this magnetic material The folding blade plate has such strength that the folding back metal plate can slide together with the folding blade plate when it is moved idly, and the folding blade plate is pressed when the folding back metal plate is pushed to move the folding blade plate. 2. The folding back metal plate is set to have a weakness such that it can be pushed and slid with respect to the plate.
Folding blade type cutter with the described breakage prevention device. 3. A folding blade plate, in which a plurality of folding line grooves are arranged side by side at appropriate intervals on the side surface of the thin blade plate, is provided at a folding blade plate insertion portion formed on a handle so that the folding blade plate can be pulled out and is fixed to the folding blade plate. The slide body protruding from the slide handle is slidably installed in the slide opening on the side of the handle, and the folding blade plate can be fixed to the handle with the tip of the blade plate pulled out from the handle. A device provided with a folding blade type cutter in which a folding back metal plate that makes it difficult to fold the folding blade plate on the back side upper edge of the folding blade plate is slidably fitted along the back side upper edge of the folding blade plate, Provided on the slide body fixed to the folding blade plate is a locking coupling mechanism that locks and couples the folded back metal plate and allows the folded back metal plate to slide together with the sliding movement of the folding blade plate. When the locking connection force of this locking connection mechanism is slid and moved, the folding plate The folding back metal plate has such strength that it can slide together with the folding back metal plate, and when the folding back metal plate is pushed by pressing the folding blade plate, the folding back metal plate is pushed against the folding blade plate. The folding blade type cutter with a breakage preventing device according to claim 1, wherein the weakness is set so that the sliding movement is possible.