JPS63237879A - Case for working tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Field of Application> The present invention relates to a case for a power tool, and particularly to a case for a power tool that can easily and reliably store and hold a power tool.

<Prior Art> Conventionally, work tools such as screwdrivers and wrenches have been stored or engaged in cases that are simply stored or holders that are simply engaged. Therefore, since these cases and holders are only intended for storage or engagement, when carrying them, the tool is not held securely within the case and may be used against your will. I jumped,
They collide with each other within the case, causing noise, damage, and even falling apart, which has the disadvantage of making it difficult to immediately find the same tool of the desired size when using it.

For this reason, conventional cases have been equipped with a means to hold the tool using the elastic force of a spring or elastic material, but these have disadvantages such as a complicated structure and a significant increase in cost. Therefore, it lacked practicality.

It has also been proposed to provide a protrusion that can engage the tool on the inner wall of a hole into which the tool can be inserted, and to hold the tool by engaging it with the protrusion, but this poses difficulties in mold manufacturing and machining. Not only that, but also machining precision is required, and since the holding is done over a small area, the protrusions become worn out over long periods of use, resulting in a gradual decline in holding power.

In addition, since the shape of the assimilation is circular, it is difficult to determine the insertion direction of a power tool with a shaft formed in a non-circular cross section such as a hexagon just by looking at the entrance of the same hole, and it may be difficult to insert the tool in the wrong direction. This often results in the case being accidentally engaged with the locking protrusion located midway in the axial direction of the same hole, making it easy for workers who are not accustomed to handling the case to insert it as is, which may cause damage to the case. Ta. Furthermore, in this case, there are problems in that it takes time to determine the direction in which the working tool is inserted into the hole, and the handling is complicated.

<Problems to be Solved by the Invention> In view of the problems of the prior art, the main purpose of the present invention is to improve the workability of inserting a power tool into a tool locking hole, and to improve the workability of inserting a power tool into a tool locking hole. Increases the locking force for work tools,
Moreover, it is an object of the present invention to provide a case for a power tool that prevents the deterioration of the locking force due to wear and the like even after long-term use, and further improves moldability and workability, thereby reducing costs.

Means for Solving the Problems> According to the present invention, the cross section of the shaft portion is polygonal, elliptical, etc. having a longer outer diameter portion and a shorter outer diameter portion. A work tool case for storing and holding a non-circularly formed work tool such as a screwdriver or wrench is provided with a tool locking hole having a shaft length that allows insertion of the shaft of the work tool, and As the tool rotates around its axis, the gap between the tool and the shank changes, and the outer diameter part of the long diameter side of the coaxial part engages, so that the tool can be locked in the hole. This is achieved by providing a power tool case characterized in that it has a cross section of .

Effect> As described above, according to the present invention, it is possible to insert a working tool,
Moreover, the gap between the tool and the hole changes as the tool rotates around its axis, and the tool case is equipped with a tool locking hole of a specific shape that allows the tool to lock in the hole. The insertion direction can be determined just by looking at the hole entrance, and since there is a gap between the hole and the tool, insertion is easy.
Furthermore, by rotating the tool around the axis, the tool can be reliably locked in the hole.

Therefore, the work tool case can be carried while the tool is locked in the hole without causing any problems such as the tool jumping. Further, unless the tool is particularly large, the tool can be inserted and locked in the case and used with the case as a grip.

<Embodiments> The present invention will now be described in detail with reference to specific embodiments with reference to the accompanying drawings.

1 to 4 show a first embodiment of a power tool case based on the present invention.

A work tool case 1 has a case body 2 that includes a plurality of work tools of different sizes (in this embodiment, six wrenches).
A plurality of (six in this embodiment) tool locking holes 3 of different sizes are provided for inserting and locking the tool.

The working tool T has a non-circular (regular hexagonal in this example) cross section of the shaft portion S, which has a longer diameter outer diameter portion A and a shorter diameter outer diameter portion B, such as a polygon or an ellipse. ) is a driver, wrench, etc.

The case 2 has a cross section formed into an oval shape with different diameters, which is formed by connecting a small arc r and a large arc R with a straight line. The front shape of the main body 2 includes parallel side walls 4.5, a flat bottom surface 6 perpendicular to the side walls 4.5, and a height h of the side wall 4 on the small arc r side and a height h on the large arc R side. It is formed in a half-jointed shape with an inclined top surface 7 formed on an inclined surface with a height lower than the height H.

The main body 2 is made of, for example, polyethylene, polypropylene, or other synthetic resin material with an extremely low elastic modulus, and can be rotated by a human hand while the work tool T is inserted into the tool locking hole 3. The part of the tool locking hole 3 that abuts the work tool T is deformed, and by removing the external force, the tool locking hole 3 recovers its original shape, and the work tool 1 is not inserted into the tool locking hole 3. It is made of a material that is strong enough to prevent permanent deformation or damage even if it is used as a grip for the tool T while being inserted and locked.

On the other hand, the tool locking hole 3 is located at the inclined top surface 7 of the case body 2.
It runs through the bottom surface 6 and parallel to the side wall 4.5. The cross section of the tool locking hole 3 is formed into an oval shape.

That is, as clearly shown in FIGS. 3 and 4, in this cross section, the inner diameter Da on the longer diameter side is larger than the outer diameter da on the longer diameter side of the shaft portion S of the power tool 'r, and the inner diameter Db on the shorter diameter side is larger than the outer diameter db on the shorter diameter side of the coaxial part S, and slightly smaller than the outer diameter da on the longer diameter side of the coaxial part S, and is an ellipse formed by connecting two semicircles with a straight line with the inner diameter Db on the short diameter side as a diameter. is formed.

As clearly shown in FIGS. 1 and 2, the locking hole 3 extends from the small arc side wall (narrow side wall) 4 to the large arc side wall (wide side wall) of the case body 2. ) A plurality of the tool locking holes 3 whose diameters gradually increase toward 5 are provided in a row, so that a plurality of work tools T having different shaft diameters can be inserted and locked.

The size of the tool locking hole 3 is such that, for example, the cross section of the shaft portion S of the power tool T is formed into a regular hexagon, and the width across flats Mb=10 m.
m, distance from the top to the top c = 11, when 5 mm, longer diameter side inner diameter Da = 12nwn, shorter diameter side inner diameter Db = 11mIT+
It's like that.

Next, the operation of the above embodiment will be explained.

According to the work tool case 1, the shape of the tool locking hole 3 is a specific shape in which the shaft portion S of the power tool T can be inserted and locked. Since the shape is approximately similar to the cross-sectional shape, when inserting the work tool T, the tool T can be inserted in the correct direction without making a mistake.
Can be easily inserted.

In addition, after inserting the tool T into the locking hole 3, if the tool T is rotated approximately 1/4 (90') around the axis, the outside diameter part A on the long diameter side of the tool T will become the short side of the hole 3. The tool T is locked to the case 1 by engaging with the radial inner diameter portion 3a.

In this way, as clearly shown in FIGS. 3 and 4, a large number of work tools T are sequentially attached to the work tool case 1.
It can be inserted and locked.

Furthermore, even if the work tool case 1 is used as a grip for the tool T while the work tool T is inserted and locked, it can be used without causing permanent deformation or damage, so the work can be done easily and quickly. can.

FIG. 5 shows a second embodiment of the present invention, in which a substantially semicircular rod with a rod diameter that is extremely small compared to the size of the hole 3 is formed on one wall surface of the inner diameter portion 3a on the shorter diameter side of the locking hole 3. A shaped engagement recess 8 is provided, and by engaging one of the longer outer diameters A of the shaft S of the power tool T, the holding force at the time of locking is increased.

Further, FIG. 6 shows a third embodiment of the present invention, in which the four engaging portions 8 are provided at opposing positions (substantially in the center) of both wall surfaces of the short diameter side inner diameter portion 3a, and By engaging both outer diameter portions A, the holding force during locking is further increased.

Furthermore, FIG. 7 shows a fourth embodiment of the present invention, in which the front face of the case body 2 is formed into a vertically symmetrical trapezoidal shape, and the working tool T can be inserted from either the top or bottom. This makes handling more convenient.

Further, FIGS. 8 and 9 show a fifth embodiment of the present invention,
The power tool case 1 is formed into a half-joint shape with a step, as if two half-joint case bodies 9 and 10 of a large and a small size are combined, and each case body 9, ]0 has a plurality of (3 case bodies) of different sizes. 6) tool locking holes 3 are provided one row at a time, so that more work tools having shaft portions S of different sizes can be inserted and locked.

The locking hole 3 of the present invention is not limited to the oval shape of the embodiment described above, but has an axial length that allows the shaft portion S of the power tool T to be inserted therein, and has an axial center of the tool T. If the gap with the tool T changes with the rotation of the surroundings, and the tool T can be locked by engaging the outer diameter part A on the longer diameter side of the shaft part S of the tool 'r. , regardless of the shape, such as a polygon or an ellipse.

Further, the cross section of the hole 3 is not limited to having the same cross section over the entire length in the axial direction as in the above embodiment, but may be tapered in the axial direction as long as it satisfies the conditions for the locking hole 3. etc.

Further, the hole 3 may be a through hole as in the above embodiment, or may be a blind hole with a closed end.

Furthermore, in addition to providing the holes 3 with a plurality of different sizes in one row or on two sides as in the above embodiment, it is of course possible to provide the holes with two or more sides.

Further, the engagement recess 8 is not limited to the semicircular shape of the above embodiment, but may have a triangular or other shape as long as the outer diameter portion A on the longer diameter side of the shaft S engages with the engagement recess 8. can.

Further, the cross section of the case body 2 is not limited to the different diameter oval shape of the above embodiment, but can be made into a trapezoid or other shapes.

<Effects of the Invention> As described above, according to the present invention, by making the shape of the tool locking hole a specific shape in which a power tool can be inserted and locked, the cross-sectional shape of the tool and the cross-sectional shape of the hole are Since the shape is approximately similar to that of the tool, it is easy to determine the direction of insertion when inserting the same tool into the same hole, and it is difficult to make a mistake in the direction of insertion, so that the tool can be inserted immediately and the workability of insertion is improved.

In addition, since the tool can be engaged with the tool by making the shape of the locking hole into a specific shape without providing a protrusion such as an engagement protrusion, the locking function can be prevented from wearing out due to use. Since defects that may cause damage are unlikely to occur, it can be used for a long period of time while maintaining a reliable holding function.

Furthermore, since no protrusion such as an engaging protrusion is provided inward of the locking hole, not only mold manufacturing efficiency is improved, but processability is also improved, and costs are reduced.

In addition, even if the same tool is inserted into the locking hole and locked, the case can be used as a grip for the same tool without causing permanent deformation or damage, so the same tool can be used each time. There is no need to remove tools from the same case, and work can be done easily and quickly, resulting in excellent workability.

As a result, it is much easier to handle than before, has excellent manufacturability and workability, and the holding power of the tool is reliable without decreasing over a long period of time, resulting in a marked improvement in performance and production. This has the great effect of reducing costs both in terms of performance and usage.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a first embodiment of a power tool case based on the present invention. FIG. 2 is a plan view of FIG. 1. FIG. 3 is a longitudinal sectional front view of the case with the power tool inserted or locked. FIG. 4 is an enlarged sectional view of the section ``■'' in FIG. 3. FIG. 5 is a diagram corresponding to FIG. 4 of the second embodiment of the same case. FIG. 6 is a diagram corresponding to FIG. 4 of the third embodiment of the same case. FIG. 7 is a front view of the fourth embodiment of the same case. FIG. 8 is a front view of the fifth embodiment of the same case. FIG. 9 is a plan view of FIG. 8.

Claims (21)

[Claims] (1) To store and hold work tools such as screwdrivers and wrenches whose shaft portion has a non-circular cross section such as a polygon or an ellipse with an outer diameter portion on the longer diameter side and an outer diameter portion on the shorter diameter side. In the work tool case, a tool locking hole is provided with a shaft length that allows insertion of the shaft of the power tool, and the gap between the tool and the shaft increases as the tool rotates around its axis. 1. A case for a power tool, characterized in that the cross section of the hole is formed such that the diameter of the hole changes and the tool can be locked by engagement of the outer diameter portion on the longer diameter side of the coaxial portion. (2) The power tool case according to claim 1, wherein the cross section of the tool locking hole is the same across the entire length in the axial direction. (3) A case for a power tool according to claim 1, wherein the cross section of the tool locking hole is formed in a tapered shape such that the leading end in the axial direction is smaller than the rear end. . (4) The power tool case according to any one of claims 1 to 3, wherein the tool locking hole is a blind hole whose tip is closed. (5) The power tool case according to any one of claims 1 to 3, wherein the tool locking hole is a through hole. (6) The cross section of the tool locking hole has an inner diameter on the longer diameter side that is larger than the outer diameter on the longer diameter side of the shaft portion of the work tool, and an outer diameter on the longer diameter side that is larger than the outer diameter on the short diameter side of the shaft portion of the work tool and the outer diameter on the long diameter side of the coaxial portion. The power tool case according to any one of claims 1 to 5, characterized in that it is formed in a non-circular shape with an inner diameter on the shorter side smaller than the diameter. (7) The power tool case according to claim 6, wherein the non-circular shape is an oval shape. (8) The power tool case according to claim 6, wherein the non-circular shape is an elliptical shape. (9) The power tool case according to claim 6, wherein the non-circular shape is a polygon. (10) The power tool case according to claim 9, wherein the polygon is a rectangle. (11) A plurality of tool locking holes are provided in which the shaft portions of a plurality of work tools of different sizes can be inserted and locked. Case for work tools. (12) The power tool case according to claim 11, wherein a plurality of tool locking holes are provided in a row. (13) The power tool case according to claim 11, wherein a plurality of tool locking holes are provided in a plurality of rows. (14) The power tool according to claim 6, characterized in that the inner diameter of the shorter diameter side is provided with an engagement recess that can be engaged with the outer diameter of the longer diameter side of the shaft portion of the power tool. case. (15) The power tool case according to claim 14, wherein the engaging recesses are provided to face each other. (16) The power tool case according to claim 14, wherein one engagement recess is provided. (17) The power tool case according to any one of claims 14 to 16, wherein the engagement recess is formed in a substantially semicircular shape. (18) The power tool case according to any one of Items 14 to 16, wherein the engagement recess is formed in a substantially triangular shape. (19) A patent claim characterized in that the cross-sectional shape of the case facing the cross-section of the tool locking hole is formed into an oval shape with different diameters, which is formed by connecting arcs of two different radii with a straight line. The power tool case according to any one of the ranges 1 to 18. (20) The operation according to any one of claims 1 to 18, characterized in that the cross-sectional shape of the case facing the cross-section of the tool locking hole is approximately trapezoidal. Tool case. (21) The elastic modulus is extremely small, and when the power tool is rotated by hand while it is inserted into the tool locking hole, the portion of the tool locking hole that abuts the work tool is deformed, and By removing the external force, the tool locking hole recovers its original shape, and has enough strength that no permanent deformation or damage will occur even if the tool is inserted into the tool locking hole and used as a grip for the same tool. The power tool case according to any one of claims 1 to 20, characterized in that the power tool case is made of a material that has the following properties.