JP2002284267A - Cushioning material for tool case and tool case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool case wherein piercing through can be prevented when a stick-like tool such as a drill or an end mill having a sharp tip is housed therein, and to make the tool case easily recyclable. SOLUTION: The tool case 1 comprises a lower case 11 and an upper case 13 and is composed of a polypropylene-made case main body 10 which becomes variable in the overall length when fitting positions of the lower and upper cases 11, 13 are changed and a polypropylene-made cushioning member 20 arranged at the bottom of the lower case 11 and in a bellows structure wherein the cushioning member itself is expandable and contractile in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool case for accommodating a rod-like tool having a sharp tip such as a drill or an end mill, and a cushion member for the tool case.

[0002]

2. Description of the Related Art Conventionally, a tool case for storing a rod-shaped tool such as a drill or an end mill, comprising a lower case having a predetermined length, and an upper case fitted to cover an opening of the lower case. It has been known. This type of tool case generally has a structure in which the closed state is maintained by fitting the unevenness formed on the outer surface of the lower case with the unevenness formed on the inner surface of the upper case. For example, the storage case described in U.S. Pat.
An example of such a conventional tool case, comprising an upper case having a web projecting to the inner surface of a corner portion, and a lower case having a number of convex portions formed so as to bulge outward at predetermined intervals on the outer surface of the corner portion. The length is variable.

[0003]

However, when tools such as a drill and an end mill are stored in such a conventional tool case, there is a problem that the sharp tips of these tools may break through the case. In particular, if axial pressure is applied to the case in a state where the tool is stored in the tool case, there is a possibility that the sharp tip of the tool stored inside may break through the bottom of the tool case.

Accordingly, a first object of the present invention is to prevent a tool case from being broken through when a rod-shaped tool having a sharp tip such as a drill or an end mill is stored. A second object is to facilitate recycling of such a tool case.

[0005]

SUMMARY OF THE INVENTION In order to achieve the first object, a cushion member for a tool case according to the present invention for accommodating a rod-shaped tool having a sharp tip such as a drill or an end mill. A cushion member housed at the bottom of the tool case, characterized in that the cushion member is formed of a synthetic resin and has a stretchable portion having a bellows structure which can be stretched and contracted in the axial direction.

According to this cushion member for a tool case, a rod-shaped tool such as a drill or an end mill is stored in a tool case with its tip end down. Then, the sharp tip of the tool is received by the cushion member and does not break through the bottom of the tool case. In this stored state, when an axial pressure is applied to the tool case, the cushion member only contracts, and the sharp tip of the tool does not break through the bottom of the tool case.

In the above-mentioned cushion member for a tool case, the cushion member has a hollow structure having an open upper surface at least, and has a narrowed portion above the hollow portion. Good. By so doing, when a tool having a thin tip is stored, it is possible to avoid a situation in which the tip end is received by the narrowed-down portion of the cushion member and passes through the cushion member and breaks through the bottom of the tool case. Because.

Further, in the above-mentioned cushion member for a tool case, reinforcing ribs for preventing the cushion member from being crushed when the cushion member contracts are formed on the bellows structure portions at the upper and lower portions of the cushion member. It is good to keep. By doing so, the cushion member is not completely crushed by being pushed by the tool, so the sharp tip of the tool does not reach the bottom of the tool case, and the tip of the tool penetrates the bottom of the tool case. This can be effectively prevented.

A tool case according to the present invention, which is also made to achieve the first object, is a tool case for storing a rod-shaped tool having a sharp tip such as a drill or an end mill. It has a case body made of synthetic resin composed of a case and an upper case, and a cushion member made of synthetic resin which is arranged on the bottom of the lower case and has a bellows structure which can expand and contract in the axial direction.

According to this tool case, a rod-shaped tool such as a drill or an end mill is housed in the lower case with its tip end down. Then, the sharp tip of the tool is received by the cushion member and does not break through the bottom of the lower case. In this state, when the upper case is fitted into the lower case and pushed in, the tool comes into contact with the cushion member and is held so as not to reach the bottom of the tool case. In this state, even if pressure is applied to the tool case in the axial direction, only the cushion member contracts, and the sharp tip of the tool does not reach the bottom of the tool case. A situation in which the bottom of the case is pierced can be effectively avoided.

Here, in the above-mentioned tool case, the case body can be made to have a variable overall length by changing a fitting position between the lower case and the upper case.

In the above-mentioned tool case, it is preferable that the cushion member has a hollow structure in which at least an upper surface is opened, and has a narrowed portion above the hollow portion. By so doing, when a tool having a thin tip is stored, it is possible to avoid a situation in which the tip end is received by the narrowed-down portion of the cushion member and passes through the cushion member and breaks through the bottom of the tool case. Because.

In the above-mentioned tool case, reinforcing ribs for preventing the cushion member from being crushed when the cushion member contracts are formed in the bellows structure portions at the upper and lower portions of the cushion member. Good.
By doing so, the cushion member is not completely crushed by being pushed by the tool, so the sharp tip of the tool does not reach the bottom of the tool case, and the tip of the tool penetrates the bottom of the tool case. This can be effectively prevented.

According to a second aspect of the present invention, there is provided a tool case according to the present invention, wherein the case body and the cushion member are formed of the same material. I do.

For example, the case body is made of a molded article of polypropylene, and the cushion member is also made of a molded article of polypropylene. Needless to say, the material is not limited to polypropylene, and may be formed of polyethylene or other synthetic resin. In these cases, blow molding can be used for molding the case body and the cushion member. In the case of blow molding, the thickness can be reduced, which is advantageous in reducing the weight of the tool case. When the thickness is reduced, as described in the problem to be solved by the invention, the case body is easily damaged by the tip of the tool. In contrast, in the present invention, the cushion member having the bellows structure is used. By adopting,
This problem has been effectively solved. The present invention is not limited to blow molding, but is also effective when a tool case is manufactured by injection molding, and does not exclude such a molding method.

As described above, by forming the case body and the cushion member from the same material, when the tool case is recycled, it can be used as recycled plastic without removing the cushion member without removing the cushion member. Thus, a very advantageous effect on recycling can be obtained. When a label is attached to the tool case, it is more desirable that the label be made of the same material as the case body and the cushion member.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A tool case according to one embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, a tool case 1 according to the present embodiment includes a lower case 11 and an upper case 13.
3. A case body 10 made of polypropylene whose overall length can be changed by changing the fitting position of 3, and a polypropylene body which is arranged at the bottom of the lower case 11 and has a bellows structure which can expand and contract in the axial direction itself. And the cushion member 20.

The lower case 11 is formed by blow molding polypropylene, and has a square cross section. At the four corners of the lower case 11, a large number of projections 15 formed to project outward are provided at equal intervals. On the other hand, the upper case 13 is also formed by blow molding polypropylene, and also has a square cross section. A web 17 is formed at the lower end portion of the cylindrical body of the upper case so as to be depressed inward with respect to the opposing corner portion. The web 17 of the upper case 13 is adapted to engage with the projection 15 of the lower case 11, and by changing the engagement position of the two, the overall length of the case body 10 can be made variable. Is configured.

As shown in FIG. 2, the cushion member 20 has a vertically staggered structure.
The upper and lower surfaces are formed with openings 20a, and have a hollow cylindrical structure as a whole. Then, as shown in FIG. 2 (A), the upper and lower portions of the hollow portion have a cross-shaped narrowing portion 21.
Are formed. The squeezed portion 21 is formed by ribs 23 formed on the upper and lower ribs of the cushion member 20. The rib 23 does not completely collapse when the cushion member 20 contracts,
This serves to prevent the sharp tip of the tool housed inside from reaching the bottom of the lower case 11. In addition,
This cushion member 20 is also formed by blow molding polypropylene.

According to the tool case 1, as shown in FIG. 3, a rod-shaped tool 30 such as a drill or an end mill is housed in the lower case 11 with its tip end down. Then, the sharp tip of the tool 30 is received by the narrowed portion 21 of the cushion member 20 and does not break through the bottom of the lower case 11. In this state, when the upper case 13 is fitted into the lower case 11 and pushed in, the cushion member 20 is slightly contracted and the tool 30 is held between the cushion member 20 and the ceiling portion 13 a of the upper case 13. Can be. As a result, the tool 30 is stored in the tool case 1 without rattling in the axial direction. In this state, the cushion member 20 is not in a completely contracted state. Therefore, with the tool 30 stored, the tool case 1
When pressure is applied in the axial direction, the entire length of the tool case 1 contracts, and the cushion member 20 also contracts. As described above, the cushion member 20 is not completely crushed by the action of the rib 23, so that the tip of the tool 30 does not break through the bottom of the lower case 11.

The tool case 1 includes a case body 1
0 and the cushion member 20 are formed by blow molding using the same material. By adopting blow molding, the thickness of the tool case 1 can be reduced,
This is advantageous in reducing the weight of the tool case 1. It is also advantageous in that the tool case 1 can be manufactured at low cost. When the thickness is reduced, the case body 10 is easily damaged by the tip of the tool 30 as described in the problem to be solved by the present invention. This problem is effectively solved by employing the cushion member 20 having the structure. And
As described above, by forming the case body 10 and the cushion member 20 from the same material, when the tool case 1 is recycled, it is possible to use the same as recycled plastic without removing the cushion member 20 without removing the cushion member 20. It is possible to obtain a very advantageous effect on recycling. When a label is attached to the tool case 1, it is more desirable that the label be formed of the same material as the case body and the cushion member.

Next, a second embodiment will be described. The second embodiment shows a modified example of a cushion member for a tool case which is used by being housed in a tool case, and is shown in FIG. This cushion member 4
0 also has a staggered structure in the vertical direction, the upper surface and the lower surface have openings 40a, and has a hollow cylindrical structure as a whole. Then, as shown in FIG. 4A, a cross-shaped narrow portion 41 is formed at the upper and lower portions of the hollow portion. The squeezed portion 41 is formed by ribs 43 formed on the upper and lower ribs of the cushion member 40. The rib 43 does not completely collapse when the cushion member 40 contracts, and exerts an effect of preventing the sharp tip of the tool housed therein from reaching the bottom of the lower case 11. It is. The cushion member 40 is also formed by blow molding polypropylene.

Although the embodiments of the present invention have been described in detail, the present invention is not limited to these embodiments.

For example, in the embodiment, the case where the tool case 1 is a so-called adjustable case having a variable length has been described. However, even if the length of the tool case 1 is constant, the cushion member having the bellows structure can be lowered as in the present invention. By arranging at the bottom of the case, the object of the present invention can be achieved, and such forms are also within the scope of the present invention. The tool case 1 is not limited to blow molding, but may be injection molding. Furthermore, in order to achieve the first object of the present invention, the tool case 1 and the cushion members 20, 40 may not be made of the same material.

[0025]

As described above in detail, according to the present invention, when a rod-like tool having a sharp tip such as a drill or an end mill is stored, the tool case is prevented from breaking through. Becomes possible. Further, by forming the case body and the cushion member with the same material, it is possible to easily recycle such a tool case.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a tool case according to an embodiment.

2A and 2B are enlarged views of a cushion member according to the embodiment, wherein FIG. 2A is a plan view and FIG. 2B is a front view.

FIG. 3 is a cross-sectional view showing a state in which a tool is stored in a tool case according to an embodiment.

4A and 4B are enlarged views of a cushion member according to a second embodiment, wherein FIG. 4A is a plan view and FIG. 4B is a front view.

[Description of Signs] 1 ... Tool case, 10 ... Case body, 11 ...
・ Lower case, 13 ・ ・ ・ Upper case, 13a ・ ・ ・ Ceiling, 15 ・ ・ ・ Protrusion, 17 ・ ・ ・ Web, 20 ・ ・ ・ Cushion member, 20a ・ ・ ・ Opening, 21 ・ ・ ・ Aperture ,
23 ... rib, 30 ... tool, 40 ... cushion member, 40a ... opening, 41 ... diaphragm, 43
··rib.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E066 CA01 EA10 GA01 NA60 3E067 AA14 AB79 AC01 BA05A BC07A EA17 EC33 EE45 GD03 3E068 AA28 AB04 AC02 BB01 CC14 CD05 CE03 DD14 DE13 EE01

Claims (8)

[Claims] 1. A cushion member to be stored at the bottom of a tool case for storing a rod-shaped tool having a sharp tip such as a drill or an end mill, which is formed of a synthetic resin and is axially self-contained. A cushion member for a tool case, comprising a stretchable portion having a stretchable bellows structure. 2. The cushion member for a tool case according to claim 1, wherein the cushion member has a hollow structure in which at least an upper surface is opened, and has a narrowed portion above the hollow portion. A cushion member for a tool case. 3. The cushion member for a tool case according to claim 1, wherein the upper and lower bellows structure portions of the cushion member do not collapse when the cushion member contracts. A cushion member for a tool case, wherein a reinforcing rib is formed. 4. A tool case for accommodating a rod-shaped tool having a sharp tip such as a drill or an end mill, comprising: a synthetic resin case main body comprising a lower case and an upper case; And a cushion member made of a synthetic resin having a bellows structure that can be extended and contracted in the axial direction. 5. The tool case according to claim 4, wherein the case main body has a variable overall length by changing a fitting position between the lower case and the upper case. Case. 6. The tool case according to claim 4, wherein the cushion member has a hollow structure in which at least an upper surface is opened, and has a narrowed portion above the hollow portion. A tool case, characterized in that: 7. The tool case according to claim 4, wherein the upper and lower bellows structure portions of the cushion member do not collapse when the cushion member contracts. A tool case characterized in that a reinforcing rib for forming the same is formed. 8. The tool case according to claim 4, wherein the case body and the cushion member are formed of the same material.