JP2006346796A - Cutting tool housing case - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cutting tool housing case facilitated in insertion/removal of a shank part into/from a holding part and capable of preventing an unexpected fall of a cutting tool from the holding part when the cutting tool is housed in a housing case. <P>SOLUTION: A structural wall of a tip side cylindrical part 10 of the holding part 2 is provided with the number N slits 14, which are respectively opened toward a tip, with an equal angle interval. A projection part 16 is provided in an outer wall upper part of the number N elastic pieces 15 formed between the slits 14 and 14 of the tip side cylindrical part 10, and the inner peripheral face of the holding part 1 is set to be loosely fitted in the peripheral diameter of the shank part. When a cover case 2 is put on at least the tip side cylindrical part 10 structural wall, the inner wall of the cover case 2 pushes the projection part 16, and each of the elastic pieces 15 is elastically deformed inside to strongly hold the shank part 92. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a storage-like case for a cutting tool (drill, end mill, etc.) in which the diameter of the tip provided with the cutting edge is smaller than the diameter of the shank, particularly cutting with a tip having a diameter of 0.02 mm to 3 mm. The present invention relates to a tool storage case.

  In recent years, a cutting tool having a tip having a small diameter has been used in order to perform a precise drilling process on a printed circuit board or the like in an electronic device.

  Therefore, a luma-type cutting tool in which the diameter of the tip provided with the cutting edge is smaller than the diameter of the shank is used, but in the future, a tip having a thinner diameter will be required. it is conceivable that.

  By the way, as a storage case for a cutting tool, a receiving hole for inserting a shank portion is formed in the case main body, and an insertion sleeve is mounted in the receiving hole. Alternatively, a plurality of flexible tongue pieces are provided so as to protrude in the circumferential direction (for example, cited reference 1). Therefore, this storage case can be held even if the shank diameter is slightly different by the spring action by the flexible tongue portion.

  However, since the cutting tool storage case is configured to hold the shank portion with a spring action of the thin tongue portion, the holding force to the shank portion is weak. For example, when there is vibration, the cutting portion is cut from the tongue portion. The tool may come out. When the above situation occurs, it is considered that the damage is relatively small in the case of a large-diameter cutting tool, but in the case of a luma-type cutting tool, there is a very high risk that the thin tip portion will break.

In recent years, in the industry that handles cutting tool storage cases, there is a cutting tool storage case in which the shank part can be easily inserted into and removed from the holding part, and the shank part is not easily dropped when the shank part is held by the holding part. I'm looking forward to developing it.
Utility Model Application Notice 3-38112

  Accordingly, the present invention provides a storage case for a cutting tool in which the shank portion can be easily inserted into and removed from the holding portion, and the cutting tool does not fall off the holding portion inadvertently when stored in the storage case. And

(Invention of Claim 1)
According to the present invention, a holding section into which a shank portion of a cutting tool is inserted and held, and at least a part of the holding section and a cutting tool portion protruding from the holding section having a regular N-square shape (N is 3 or more). In a storage case for a cutting tool constituted by a natural number cover case, the distal end side cylindrical portion of the holding portion is provided with N slits opened at equal angular intervals on the distal end side cylindrical portion constituting wall, and the distal end side cylindrical portion Protrusions are provided in the upper region of the outer wall of the N elastic pieces formed between the slits, and the inner peripheral surface of the holding part is set so as to be loosely fitted to the outer diameter of the shank part, When the cover case is extrapolated to at least the tip-side cylindrical portion constituting wall, the protrusion is pushed in by the inner wall of the cover case, whereby each elastic piece is elastically deformed inward and the shank portion is firmly held.
(Invention of Claim 2)
The present invention relates to a cutting unit comprising a holding part into which a shank part of a cutting tool is inserted and held, and a cover case having a circular cross section that is extrapolated to at least a part of the holding part and a cutting tool part protruding from the holding part. In the storage case of the tool, at least N slits (N is a natural number of 3 or more) opened at equal angular intervals are provided on the tip-side cylindrical portion constituting wall of the holding portion at equal angular intervals. A protrusion is provided in the upper area of the outer wall of the N elastic pieces formed between the slits, and the inner peripheral surface of the holding part is set so as to be loosely fitted with respect to the outer peripheral diameter of the shank part. When the case is extrapolated to at least the tip-side cylindrical wall, the projection is pushed in by the inner wall of the cover case, whereby each elastic piece is elastically deformed inward and the shank is firmly held. That.
(Invention of Claim 3)
The storage case for a cutting tool according to the present invention relates to the invention according to claim 1 or 2, wherein the holding portion and the cover case are made of an elastic synthetic resin, and the cover case is transparent or translucent. (Invention of Claim 4)
The storage case for a cutting tool according to the present invention relates to the invention according to any one of claims 1 to 3, wherein a groove connected to the slit is provided on the inner wall surface of the hole-constituting wall in which the shank portion of the holding portion is inserted. The part is made up.
(Invention of Claim 5)
The storage case for a cutting tool according to the present invention relates to the invention according to any one of the first, third, and fourth aspects, and the cross-sectional shape of the cover case is a regular triangle, a regular square, or a regular hexagon.
(Invention of Claim 6)
The storage case for a cutting tool according to the present invention relates to the invention according to any one of the first to fifth aspects, and is intended for a luma-type cutting tool having a tip diameter of 0.02 mm to 3 mm.
(Invention of Claim 7)
A cutting tool storage case according to the present invention includes a holding portion into which a shank portion of a cutting tool is inserted and held, and a cover case that is externally inserted into at least a part of the holding portion and a cutting tool portion protruding from the holding portion. In the cutting tool storage case, at least N slits (N is a natural number of 3 or more) are provided at equal angular intervals on the tip-side cylindrical portion constituting wall of the holding portion, and the tip-side cylinder is provided. Protrusions are provided in the upper part of the outer wall of the N elastic pieces formed between the slits of the part, and the inner peripheral surface of the holding part is set so as to be loosely fitted to the outer diameter of the shank part. When the cover case is extrapolated to at least the tip-side cylindrical wall, the projection is pushed by the inner wall of the cover case, whereby each elastic piece is elastically deformed inward to strengthen the shank. It is held in.

  According to the storage case of the cutting tool of the present invention, the shank part can be easily inserted into and removed from the holding part, and the cutting tool does not accidentally fall off the holding part when stored in the storage case.

  In the following, an embodiment as the best mode for carrying out the cutting tool storage case of the present invention will be described in detail.

1 is a front view of a cutting tool storage case K according to an embodiment of the present invention and a luma-type cutting tool 9 received and held therein, FIG. 2 is a perspective view of the storage case K of the cutting tool 9, and FIG. 4 is a partial cross-sectional view of the storage case K, FIG. 4 is a plan view of a holding part constituting the storage case K, and FIG. 5 is a plan view showing a state in which the cover case 2 is extrapolated from the state of FIG. FIG. 6 is a plan view showing a state where the cover case 1 is extrapolated from the state of FIG.
(Basic configuration of storage case K for this cutting tool)
As shown in FIG. 1 and FIG. 2, the cutting tool storage case K protrudes from the holding part 1 into which the shank part 90 of the cutting tool 9 is inserted and held, the upper part of the holding part 1 and the holding part 1. It is comprised from the cover case 2 extrapolated by the cutting tool 9 part to perform.

Below, the holding | maintenance part 1, the cover case 2, and the cutting tool 9 which comprise this storage case K are explained in full detail.
(About the configuration of the cutting tool 9)
As shown in FIG. 1, the cutting tool 9 is of a router type, and includes a tip end portion 90 on which a cutting edge is formed and a taper portion 91 connected to the tip end portion 90 from a shank portion 92. . Here, the shank portion 92 is set to a relatively large diameter because it is connected to the connecting means of the machine tool, but the tip portion 90 is set to an extremely thin diameter (for example, 0.02 mm to 3 mm). is there.
(About the configuration of the holding unit 1)
As shown in FIGS. 1 to 3, the holding unit 1 is made of polyethylene ionomer (hardness: JIS K-7215 50-55, rebound resilience: JIS K6310 35-65, friction coefficient: JIS K-7204 1.0-1 .5) and is basically formed by integrally molding the tip side cylindrical portion 10, the case fitting portion 11 and the base portion 12, and is connected from the tip side cylindrical portion 10 to the base portion 12. A hole 12 for inserting a shank is formed.

  As shown in FIG. 1 to FIG. 4, the distal end side cylindrical portion 10 is provided with four slits 14 that open toward the distal end on the constituent walls, and is provided between the slits 14, 14. An elastic piece 15 is configured, and a thin portion 17 is configured by forming a groove 17 connected (continuous) to the slit 14 on the inner surface side of the configuration wall. Further, as shown in FIGS. 3 and 5, the distal end region of the distal end side cylindrical portion 10 has a tapered shape that gradually widens toward the distal end, and a protrusion 16 is provided in the upper region of the outer wall of the elastic piece 15. ing. Here, the inner peripheral surface of the hole 13 of the holding portion 1 is set so as to be loosely fitted with respect to the outer peripheral diameter of the shank portion 92, and the protruding portion 16 of the elastic piece 15 is set inward. When pushed in, the diameter of the tip of the hole 13 is made smaller than the shank 92. As shown in FIG. 3, the protrusion 16 has a tapered shape that decreases toward the tip.

  As shown in FIGS. 1 and 2, the case fitting portion 11 is formed in a substantially square shape in which the open end of the cover case 2 is closely fitted.

As shown in FIGS. 1 and 2, the base portion 12 has a plan view shape that is the same as the outer peripheral shape of the cover case 2.
(About the structure of the cover case 2)
As shown in FIG. 1 and FIG. 2, the cover case 2 is a cylindrical one with an open end having a square cross section made of a transparent or translucent polyethylene ionomer (hardness: JIS K-7215 56-70). The dimension between the inner surfaces of the opposing wall surfaces is set slightly smaller than the dimension between the protrusions 16 and 16 of the elastic pieces 15 and 15 facing away from each other.
(About storing / removing the cutting tool 9 from / to the cutting tool storage case K)
(1) Remove the cover case 2 from the holder 1.
(2) Insert the shank part 92 of the cutting tool 9 into the hole 13 of the holding part 1. Here, the inner peripheral surface of the hole 13 of the holding portion 1 has a loose fit with respect to the outer peripheral diameter of the shank portion 92 and has a tapered shape that gradually widens toward the tip of the hole 13 of the holding portion 1. The insertion operation is very easy. Further, since the thin-walled portion 17 is formed by forming (continuous) the groove 17 connected to the slit 14 in the holding portion 1, even if the shank portion 92 has a relatively large diameter due to a manufacturing error, the thin-walled portion The shank portion 92 can be inserted without difficulty due to the expansion of 17.
(3) Next, the cover case 2 is extrapolated until it contacts the case fitting portion 11. In this extrapolated state, as shown in FIGS. 5 and 6, the elastic piece 15 is pushed inward by the four inner wall surfaces of the cover case 2 through the protrusions 16, so that the shank portion 92 has 4 The protrusions 16 are firmly held. In addition, since the holding | maintenance part 1 is formed with the above-mentioned polyethylene-type ionomer, a friction coefficient is large and, as a result, inadvertent drop-out is suppressed.
(4) When removing the cutting tool 9 from the cutting tool storage case K, the cover case 2 is removed from the holding portion 1. In this state, as shown in FIGS. 3 and 4, the elastic piece 15 is elastically restored, and the holes formed by the four elastic pieces 15 are expanded. Therefore, the cutting tool 9 can be easily taken out by holding the shank portion 92 and applying a pulling force.
(About the excellent effect of this cutting tool storage case K)
(1) Since described in the above section (About the storage and removal of the cutting tool 9 with respect to the cutting tool storage case K), it is easy to attach and detach the cutting tool 9 to and from the holding portion 1, In the state where the cover case 2 is extrapolated while being held by the holding portion 1, it is clear that there is very little risk that the shank portion 92 will inadvertently fall off the holding portion 1.
(2) Since the peripheral surface of the cutting tool storage case K is composed of four transparent or translucent resin plates, there is no lens effect visually and there is little risk of mistaking the size of the cutting tool. .
(About other contents)
The cross-sectional shapes of the cover case 2 and the case fitting portion 11 are not limited to regular squares, and may be regular triangles, regular hexagons, other regular polygons, or circular shapes. When the cross-sectional shape of the cover case 2 and the case fitting portion 11 is a regular N square (N is a natural number), the slits 14 and the thin portions 17 are formed at an interval of 360 ° / N, and there are N elastic pieces 15. And each elastic piece 15 comes to be elastically deformed by the surface which forms the cross-sectional regular N square of the cover case 2, respectively.

  Moreover, as resin which comprises the holding | maintenance part 1, PVC, PE, PE type | system | group copolymer etc. can be used, and PVC, transparent PP, styrene resin etc. can be used as resin which comprises the cover case 2. FIG. Basically, it is important that the holding portion 1 has an elastic force and the cover case 2 has rigidity. This is because the elastic piece 15 of the holding portion 1 must be pushed by the inner wall surface of the cover case 2.

The front view of the storage case of the cutting tool of the Example of this invention, and the luma type cutting tool accommodated and hold | maintained at this. The perspective view of the storage case K of the said cutting tool. FIG. 3 is a partial cross-sectional view of the storage case K. FIG. 3 is a plan view of a holding portion that constitutes the storage case K. The top view which shows the state which extrapolated the cover case 2 to the holding | maintenance part 1 from the state of FIG. The top view which shows the state which extrapolated the cover case 1 to the holding | maintenance part 2 from the state of FIG.

Explanation of symbols

K cutting tool storage case 1 holding part 10 tip cylindrical part 11 case fitting part 12 base part 13 hole 14 slit 15 elastic piece 16 projection part 17 thin-walled piece

Claims (7)

A holding part into which a shank part of a cutting tool is inserted and held, and a cover having a regular N-square shape (N is a natural number of 3 or more) that is extrapolated to at least a part of the holding part and a cutting tool part protruding from the holding part In the storage case of the cutting tool constituted by a case, N slits that open toward the tip are provided in the tip side cylindrical portion constituting wall of the holding portion at equiangular intervals, and between the slits of the tip side cylindrical portion Protrusions are provided in the upper area of the outer wall of the N elastic pieces formed on the inner part, the inner peripheral surface of the holding part is set so as to be loosely fitted to the outer peripheral diameter of the shank part, and the cover case is at least The projection is pushed in by the inner wall of the cover case when it is extrapolated to the tip side cylindrical wall, whereby each elastic piece is elastically deformed inward and the shank is firmly held. Storage case of the cutting tool. A cutting tool storage case comprising: a holding portion into which a shank portion of a cutting tool is inserted and held; and a cover case having a circular cross section that is externally inserted into at least a part of the holding portion and a cutting tool portion protruding from the holding portion. In addition, at least N slits (N is a natural number of 3 or more) opened at equal angular intervals are provided on the front-end-side cylindrical portion constituting wall of the holding portion, and between the slits of the front-end-side cylindrical portion. Protrusions are provided in the upper region of the outer wall of the N elastic pieces to be formed, the inner peripheral surface of the holding part is set so as to be loosely fitted to the outer peripheral diameter of the shank part, and the cover case is at least at the tip When it is extrapolated to the side cylindrical wall, the projection is pushed in by the inner wall of the cover case, whereby each elastic piece is elastically deformed inward and the shank is firmly held. Storage case of a cutting tool to be. 3. The cutting tool storage case according to claim 1, wherein the holding portion and the cover case are made of an elastic synthetic resin, and the cover case is transparent or translucent. The cutting tool according to any one of claims 1 to 3, wherein a groove portion connected to the slit is provided on the inner wall surface of the hole-constituting wall in which the shank portion of the holding portion is inserted to form a thin portion. Storage case. 5. The cutting tool storage case according to claim 1, wherein a cross-sectional shape of the cover case is a regular triangle, a regular square, or a regular hexagon. The cutting tool storage case according to any one of claims 1 to 5, which is intended for a luma-type cutting tool having a tip portion diameter of 0.02 mm to 3 mm. In the cutting tool storage case, comprising: a holding part into which a shank part of a cutting tool is inserted and held; and a cover case which is externally inserted into at least a part of the holding part and a cutting tool part protruding from the holding part; At least N slits (N is a natural number of 3 or more) are provided at equal angular intervals on the front-end-side cylindrical portion constituting wall, and N is formed between the slits of the front-end-side cylindrical portion. Protrusions are provided on the outer wall upper area of each elastic piece, the inner peripheral surface of the holding part is set so as to be loosely fitted to the outer peripheral diameter of the shank part, and the cover case is configured at least at the front end side cylindrical part When the projection is inserted into the wall, the projection is pushed in by the inner wall of the cover case, whereby each elastic piece is elastically deformed inward and the shank portion is firmly held. Ingredients of the storage case.

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