JPS6241725Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a slider used in a cutter knife, and particularly relates to an improvement in a slider having a built-in leaf spring.

(Prior art) Conventionally, as this type of slider, for example, Utility Model Publication No. 51-41680, Utility Model Number 57-20129, and Utility Model Number 53-
The one disclosed in No. 45358 is known.

The slider disclosed in Japanese Utility Model Publication No. 51-41680 and Japanese Utility Model Publication No. 57-20129 is mainly used for standard cutter knives, and consists of a slider body with a protrusion, an operating part, and a housing cavity, and a slider body equipped with a protrusion, an operating part, and a housing cavity. It consists of a leaf spring inserted into the

However, since such a slider is composed of two parts, the slider body and the leaf spring,
Although the structure and assembly are extremely simple, if an impact is applied due to a drop or the like, the leaf spring will fly out of the housing cavity and the slider body and leaf spring will easily disassemble.

On the other hand, the slider disclosed in Japanese Utility Model Publication No. 53-45358 is mainly used for magazine-type katsuta knives, and consists of a base body with a protrusion and a accommodating part, and a crown body with an operating part and a accommodating cavity. The base body and the crown body are joined together by so-called engagement after the leaf spring is inserted into the accommodating portion of the base body.

With this kind of slider, even if a shock is applied due to a fall, etc., the leaf spring will not immediately pop out like the slider mentioned above, but since the base and crown are attached by engagement, this engagement There was a strong possibility that it would come undone and disintegrate.

However, since this slider is mainly used for magazine-type cutter knives, the front part of the base body is placed on the raised part formed at the frontmost part of the holder, so that the protrusion provided on the front side of the base body and the blade body are connected to each other. However, if this action is repeated, the elasticity of the front half of the base will gradually deteriorate and it will not be able to return to its original state, causing the protrusion of the slider and the penetration of the blade to become loose in normal conditions. There was also the problem that the engagement with the hole could not be done properly.

(Problems that the invention attempts to solve) This invention was created in view of the problems mentioned above and to solve them, and its purpose is to:
A slider for a cutter knife that prevents the component parts from disintegrating inadvertently even if a shock is applied due to a drop, etc., and also allows the protrusion of the slider to properly engage with the through-hole of the blade body under normal conditions. It is on offer.

(Means for Solving the Problems) The slider for a cutter knife of the present invention has a warped piece provided at the front part that is warped to the front side, a protrusion provided near the rear of this piece and protruded to the back side, and a rear part of the slider. A metal base having a substantially flat shape and having a plurality of pairs of mounting pieces provided in the front-rear direction and extending from both upper and lower ends to the front side, and a metal base that is in a substantially flat shape and has a plurality of pairs of mounting pieces provided in the front and back direction and extending from both upper and lower ends to the front side, and a metal base that is in contact with the surface of the rear half of the base and is attached to the inner side of the mounting pieces of the base. A flat plate part that is attached by bending, a neck part that protrudes from the front side of this part and has a narrower vertical width than this part, an operating part that is connected to the front side of this part, and a part that extends to the vicinity of the warped piece of the base body on the front side of the flat part part. An elastic piece part that extends and comes into contact with the surface of the front half of the base, a housing cavity that is recessed from the back surface of the flat plate part inside the flat plate part and the neck, and a housing cavity from either the upper or lower surface of the neck. A crown body is provided with a window hole drilled to reach the crown body, and a semicircular part and legs extending from both ends of the crown body are provided. It is characterized by a plate spring inserted into a housing cavity so as to project outward.

In other words, it is composed of a base, a crown, and a leaf spring, and the base and the crown are combined by bending the mounting piece of the metal base, and an elastic piece is provided on the crown to attach it to the base. It is made to abut against the surface of the first half.

(Function) Since the base body and the crown body are attached by bending the mounting pieces, they are securely combined without being disassembled by impact, and the leaf spring does not fly out from the accommodation cavity.

Since the elastic piece of the crown exists on the surface of the front half of the base, even if this portion is repeatedly bent to the front side, it immediately returns to its normal state.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a partially cutaway front view of a slider for a katsuta knife according to an embodiment of the present invention. Figure 2 is its bottom view. Figure 3 is its rear view. FIG. 4 is a cross-sectional view taken from FIG. FIG. 5 is a cross-sectional view of FIG. 1.

The main parts of the slider 1 for a cutter knife include a base body 2, a crown body 3, and a leaf spring 4.

The base 2 is made of metal and has a generally flat plate shape and is provided with a warped piece 5 at the front and warped towards the front side, a protrusion 6 provided near the rear of the warped piece and protruding towards the back side, and multiple pairs of mounting pieces 7 provided in the front-to-rear direction of the rear half and extending towards the front side from both the upper and lower ends.

In this example, in addition to this, there is a curved portion 8 that curves toward the front side at the rear, and notches 9 at the top and bottom near the rear of the protrusion 6.
However, between the two pairs of mounting pieces 7 spaced apart from each other in the front and back, there are provided holding pieces 10 extending to the front side from both upper and lower ends, and sliding protrusions 11 protruding to the back side are provided near these holding pieces 10, respectively.

Each part of the base body 2 is integrally formed by pressing a steel plate.

The crown body 3 includes a flat plate part 12 that abuts the surface of the rear half of the base body 2 and is attached by bending the mounting piece 7 of the base body 2 inward, and a flat plate part 12 that protrudes from the front side of this plate part and has a vertical width narrower than this. A neck portion 13 , an operation portion 14 connected to the front side of the neck portion 13 , and an elastic piece portion 15 that extends to the front side of the flat plate portion 12 to near the warped piece 5 of the base body 2 and comes into contact with the surface of the front half of the base body 2 . and a housing cavity 16 recessed from the back surface of the flat plate part 12 inside the flat plate part 12 and the neck part 13, and a window hole 17 bored to reach the housing cavity 16 from either the upper or lower surface of the neck part 13. It is prepared.

In this example, a recess 18 corresponding to the thickness of the mounting piece 7 is provided on the upper and lower surfaces of the flat plate portion 12 corresponding to the mounting piece 7 of the base body 2 .

The operating portion 14 has a vertical width larger than that of the neck portion 13 and the flat plate portion 12, and has unevenness 1 for locking on its upper surface.
9 are provided, and grooves 20 are formed on the top and bottom of the neck 13.

Each part of the crown body 3 is integrally formed by injection molding of synthetic resin.

The leaf spring 4 includes a semicircular portion 21 and leg portions 22 extending from both ends thereof, and the semicircular portion 21 projects outward from the window hole 17 of the crown body 3 before the base body 2 and the crown body 3 are combined. It is inserted into the accommodation cavity 16 as shown in FIG.

In this example, since the window hole 17 of the crown body 3 is provided from the upper surface of the neck 13 to the accommodation cavity 16, the semicircular part 21 projects upward from here, and the leg part 22 extends from the lower wall of the accommodation cavity 16. It's on the side.

The leaf spring 4 is made of spring steel, as is well known.

First of all, such a slider 1 for a katsuta knife is
The leaf spring 4 is flattened and inserted into the accommodation cavity 16 of the crown body 3. Then, the semicircular portion 21 projects upward from the window hole 17, and both leg portions 22 are accommodated in contact with the lower wall side of the accommodation cavity 16.

Next, the back surface of the crown body 3 is brought into contact with the surface of the base body 2. Then, the holding piece 10 of the base body 2 comes into contact with the upper and lower surfaces of the flat plate portion 12 of the crown body 3, and relative movement in the vertical direction is prevented.

Then, the mounting pieces 7 of the crown body 3 are each bent inward. Then, since the mounting piece 7 is buried in the recess 18 of the flat plate part 12, its outer surface becomes flush with the upper and lower surfaces of the flat plate part 12, and the base body 2 and the crown body 3 are connected in the front-back direction and the front-back direction. They are combined without relative movement.

At this time, the elastic piece 15 of the crown body 3 is in contact with the surface of the front half of the base body 2, and the back opening of the accommodation cavity 16 is closed by the base body 2.

The cutter knife slider 1 assembled in this manner is inserted into a T-groove of a holder (not shown) as is well known.

That is, the flat plate part 12 and the bullet part 15 of the base body 2 and the crown body 3 are in the wide groove part of the T groove, the neck part 13 of the crown body 3 is in the narrow groove part of the T groove, and the crown body 3 is in the outside of the front side of the holder.
The operating sections 14 are inserted into the respective positions.

On the other hand, the blade (not shown) is positioned in the wide groove of the T-groove of the holder, and the protrusion 6 of the base body 2 is inserted into the through hole thereof.

The lower end of the upper surface wall forming the narrow groove portion of the T-groove of the holder is usually provided with sawtooth-like unevenness, and the leaf spring 4 protrudes upward from the window hole 17 of the crown body 3.
The semicircular portion 21 of is elastically engaged with this sawtooth-like unevenness.

Therefore, when the cutter knife slider 1 is strongly operated, the cutter knife slider 1 and the blade move forward and backward with respect to the holder, and when the operation is stopped, the cutter knife slider 1 and the blade are stopped at that position. be done.

In addition, when the katsuta knife is of the magazine type, as is well known, a riding part is formed at the frontmost part of the holder, so by placing the front half of the base body 2 of the slider 1 for the katsuta knife on this part, the base body 2 can be raised. By disengaging the protrusion 6 from the through hole of the blade, the blade can be easily removed from the tip of the holder.

Even if this operation is repeated, since the bullet part 15 of the crown body 3 remains in contact with the surface of the front half of the base body 2, the elasticity of this bullet part 15 is taken into account. In addition to being easy to return to its original straight state, the front half of the base body 2 and the bullet part 15 of the crown body 3 are not fixed together, so they stretch and bend while contacting each other, making it relatively straight. Easy to bend.

Therefore, when the slider 1 for the cutter knife is retreated, it immediately returns to its original straight state, so that it does not remain bent and the subsequent engagement between the through hole of the blade and the protrusion 6 of the base 2 is smooth and reliable. can be done.

In the previous embodiment, the base body 2 includes a warped piece 5, a protrusion 6, a mounting piece 7, a warped part 8, a notch 9, and a holding piece 1.
0, the sliding protrusions 11 were shaped respectively,
The present invention is not limited to this, and for example, the warped portion 8, notch 9, holding piece 10, and sliding protrusion 11 may be omitted.

In the previous embodiment, the mounting pieces 7 of the base body 2 are provided in two pairs in the front-rear direction, but the mounting pieces 7 are not limited to this, and may be provided with three or more pairs, for example.

In the previous embodiment, the operating portion 14 of the crown body 3 had a wider vertical width than the neck portion 13 and the flat plate portion 12;
The width is not limited to this, and the width may be the same as that of the neck 13, for example.

In the previous embodiment, the window hole 17 of the crown body 3 is
3 is provided so as to reach the accommodation cavity 16 from the upper surface of the neck portion 13, but the present invention is not limited thereto. For example, it may be provided to reach the accommodation cavity 16 from the lower surface of the neck portion 13 in response to the serrated irregularities of the holder.

In the previous embodiment, the crown 3 is provided with the recess 18, but this is not limiting and the recess may be omitted.

Although the crown body 3 was made of synthetic resin in the previous embodiment, it is not limited to this, and may be made of metal such as aluminum die-casting.

(Effects of the invention) As described above, according to the present invention, the following excellent effects can be achieved.

(1) Since the base body and the crown body are combined by bending the attachment piece of the metal base body, they will not be accidentally disassembled even if a shock is applied due to a fall or the like.

Therefore, the leaf spring accommodated in the accommodation cavity of the crown body and closed by the base body will not come out.

(2) A bullet part is provided on the crown body and is brought into contact with the surface of the front half of the base body, so even if this part is repeatedly bent to the front side, it will immediately return to its original straight state. This allows the protrusion of the slider to properly engage with the through-hole of the blade.

(3) Since the base and crown are made separately and combined during assembly, they can be made of different materials.
The total elastic force of the front half of the base and the bullet part of the crown can be set to an optimal value.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of a slider for a katsuta knife according to an embodiment of the present invention. Figure 2 is its bottom view. Figure 3 is its rear view. FIG. 4 is a cross-sectional view taken from FIG. FIG. 5 is a cross-sectional view of FIG. 1. 1...Slider for katsuta knife, 2...Base body,
3... Corona body, 4... Leaf spring.

Claims (1)

[Scope of utility model registration request] A warped piece provided at the front part and warped toward the front side, and a protrusion provided near the rear side of this piece and protruded to the back side;
A metal base having a substantially flat shape and having a plurality of pairs of mounting pieces provided in the front-rear direction of the rear half and extending from both upper and lower ends to the front side, and mounting of the base by abutting against the surface of the rear half of the base. A flat plate part that is attached by bending the piece inward, a neck part that protrudes from the front side of this part and has a narrower vertical width than this, an operating part connected to the front side of this part, and a curved base on the front side of the flat part. An elastic piece extending to the vicinity of one end and coming into contact with the surface of the front half of the base body, a housing cavity recessed from the back surface of the flat plate part inside the flat plate part and the neck, and one from either the upper or lower surface of the neck. A crown body is provided with a window hole drilled to reach the accommodation cavity, and a semicircular part and legs extending from both ends of the crown body are provided. A slider for a cutter knife, comprising: a plate spring inserted into a housing cavity so that a semicircular part projects outward;