JP2000313441A - Adjustable case - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reliably position and hold an inner case body and an outer case body to reduce removal of the case body by increasing engaging force between an engaging portion and an uneven string and also to improve accuracy in thickness so that thickness in respective parts of the inner and outer case bodies is uniform by injection molding. SOLUTION: The adjustable case comprises an outer case body 3 fitted over an inner case body 2 in a longitudinally slidable manner. In this case, an uneven string 23 is provided at a position off from a ridge of a parallelopiped corner on an external surface of a side wall 8 of the inner case body 2, while an engaging portion 27 to be engaged with the string 23 in such a manner that it can be engaged with/disengaged from the string is provided at a position off from a ridge of a parallelopiped corner on an internal surface of a side wall 17 of the outer case body 3. In addition, an opening hole 10 is provided on a base wall 9 of the inner case body 2, while an opening hole 19 is provided on a base wall 18 of the outer case body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adjustable case for storing cutting tools and other various articles.

[0002]

2. Description of the Related Art An adjustable case for accommodating a tool or the like has a square tubular inner case body having one end opened and the other end closed, and a square cross section having one end opened and the other end closed. And an outer case body in the shape of a square tube, and a row of irregularities is provided on the outer surface of the side wall of the inner case body in the longitudinal direction, and engages with the inner surface of the side wall of the outer case body in a detachable manner with the row of irregularities. An engaging portion is provided, and the outer case body is slidably fitted to the inner case body in the longitudinal direction so that the closed end of the inner case body and the closed end of the outer case body are located on both sides in the longitudinal direction. There is a configuration in which the engagement portion is configured to be capable of adjusting the expansion and contraction by engaging and disengaging the engagement portion with the uneven row. In a conventional adjustable case of this kind, the concave / convex row in which engagement concave portions are arranged in a row so as to straddle a ridgeline of the rectangular cylinder corner portion is provided in a rectangular cylinder corner portion of the inner case body, In some cases, a movable piece having the engaging portion is provided at a corner of a rectangular cylinder of a body so as to straddle a ridgeline of the corner of the rectangular cylinder (for example, Japanese Patent Application Laid-Open No. H10-316).
141).

[0003]

When the adjustable case is adjusted to expand and contract, the engaging portion of the movable piece of the outer case body repeatedly engages and disengages with the concave and convex rows of the inner case body. The engaging portion of the outer case body is more likely to be worn than the uneven rows. However, in the case of the related art, since the concave and convex rows are provided at the corner portion of the inner case body so as to straddle the corner portion, the corner portion of the inner case body is strong in strength. When the joint is disengaged from the uneven row, the uneven row hardly moves in and out due to the elastic deformation of the inner case body, so that the engaging portion of the outer case body is easily worn. Due to the wear of the engaging portion of the outer case body, the positioning and holding of the inner case body and the outer case body may be uncertain due to the engagement of the engaging portion with the concave / convex array after the expansion and contraction adjustment in a short-term use. There is a problem that the durability of the adjustable case is inferior.

Further, in the conventional case, since the other ends of the inner case body and the outer case body are closed, the inner case body or the outer case body is injection-molded, and then the inner case body or the outer case body is removed from the core. When pulling out, it becomes difficult for air to flow into the inner case body or the outer case body, so that the inside of the inner case body or the outer case body becomes negative pressure, and the side wall of the inner case body or the outer case body Danced and became wavy, and the core could not be pulled out smoothly.Thus, the thickness of each part of the inner case body and the outer case body became uneven, and the thickness of the inner case body and the outer case body The accuracy of the thickness could not be improved.

The present invention has been made in view of the above problems, and has a high durability in which the positioning of the inner case body and the outer case body by the engagement of the engaging portions with the concave / convex rows can be ensured for a long period of time. It is an object of the present invention to provide an adjustable case, and to form an inner case body and an outer case body by injection molding so as to improve the accuracy of the wall thickness so that the wall thickness of each part becomes uniform, and to form the inner case body and the outer case body satisfactorily. .

[0006]

The technical means of the present invention for solving this technical problem is an adjustable case in which an outer case body 3 is externally fitted to an inner case body 2 so as to be adjustable in expansion and contraction. In the position of the outer surface of the side wall 8 of the inner case body 2, the irregularities 23
Is provided at a position on the inner surface of the side wall 17 of the outer case body 3 which is separated from the corner portion 28 of the rectangular cylinder. .

Another technical means of the present invention is to provide an adjustable case in which an outer case body 3 is fitted to an inner case body 2 so as to be adjustable in expansion and contraction. An opening 10 is provided in the wall 9, and an opening 19 is provided in the bottom wall 18 of the outer case body 3.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show an embodiment of the present invention. In the drawings, reference numeral 1 denotes an adjustable case, a cylindrical inner case body 2 having one end opened and the other end closed; A cylindrical outer case body 3 whose end is closed. The outer case body 3 is externally slidably fitted to the inner case body 2 in the longitudinal direction, and the inner case body 2 and the outer case body 3 are closed by the closed end of the inner case body 2 and the outer case body 3. The ends of the adjustable case 1 are combined so that the ends are located on both sides in the longitudinal direction, so that the adjustable case 1 is configured to be freely expandable and contractible.

The inner case body 2 is formed in the shape of a square cylinder with a bottom and a square cross section integrally having four side walls 8 and a bottom wall 9, and an opening hole 10 is formed in the bottom wall 9 of the inner case body 2. Is provided. The inner case body 2 is made of polypropylene,
It is formed integrally by injection molding of polyethylene or another transparent synthetic resin, and a plug 7 formed separately from the inner case body 2 is attached to the inner case body 2 so as to close the opening hole 10. A taper 11 is provided at an outer opening edge of the opening 10 in the bottom wall 9 so that the opening 10 gradually increases outward.

The outer case body 3 is formed in a square cylindrical shape having a rectangular cross section and having four side walls 17 and a bottom wall 18.
An opening hole 19 is provided in the bottom wall 18 of the outer case body 3. The outer case body 3 is integrally formed by injection molding of polypropylene, polyethylene or another transparent synthetic resin similarly to the inner case body 2, and a stopper 16 formed separately from the outer case body 3 has an opening hole. 19 is attached to the outer case body 3 so as to cover the same. Opening hole 19 in bottom wall 18 of outer case body 3
Is provided with a taper 20 which is inclined so that the opening 19 gradually increases outward.

On the outer surface of all the side walls 8 of the inner case body 2, a pair of concave / convex rows (first meshing means) 23 are provided one by one in the width direction. The concavo-convex rows 23 are provided in the longitudinal direction on both sides in the width direction of the outer surface of each side wall 8, deviating from the corner portion 24 of the rectangular cylinder. Each uneven row 23 is configured by arranging locking projections 25 in the longitudinal direction at regular intervals on the outer surface of the side wall 8 of the inner case body 2. Solid truncated pyramid-shaped projections are provided on the outer surface of the side wall 8 at regular intervals, and the portion where the locking projection 25 of the side wall 8 is provided is the portion of the side wall 8 where the engaging portion 25 is not provided. The wall thickness is larger than the wall thickness.

On the inner surface of all the side walls 17 of the outer case body 15, a pair of convex engaging portions (second engaging means) 27 which are detachably engaged with the concave / convex rows 23 are provided one by one in the width direction. I have. The engaging portions 27 are provided on both sides in the width direction on the inner surface of the side wall 17 deviating from the ridge line of the corner portion 28, corresponding to the uneven row 23, and are located on the opening end side of the outer case body 3. I have. Each engaging portion 27 is provided with a solid truncated pyramid-shaped projection on the inner surface of the side wall 17 of the outer case body 3 and is formed slightly larger than the locking projection 25 of the uneven row 23 of the inner case body 2. And adjacent locking projections 25 of the uneven row 23
It is designed to engage between.

The plug 7 of the inner case body 2 comes into contact with the edge of the opening hole of the bottom wall 9 of the inner case body 2 from the outside to form an opening hole 10.
And a fitting portion 32 protruding from the blocking wall 31 and inserted into the opening hole 10 of the inner case body 2, and a distal end portion of the fitting portion 32 has an opening hole 10. An engaging claw 33 that engages with the opening edge of the opening so as to prevent it from coming off from the inside is provided. A taper 34 is provided on the outer periphery of the distal end portion of the fitting portion 32 of the plug 7 so that the distal end side becomes gradually thinner. Further, the fitting portion 32 of the plug 7 is formed in a cylindrical shape, and the fitting portion 32 is provided with a concave portion 35 that is recessed in the axial direction from the distal end surface.

The plug 16 of the outer case 3 is, like the plug 7 of the inner case 2, connected to the edge of the opening of the bottom wall 18 from the outside to close the opening 37. , The closing wall 3
7. A fitting portion 38 protruding from the inner hole 7 and inserted through the opening 19.
And an engagement claw 39 which is engaged with the opening edge of the opening hole 19 so as to prevent the opening from being pulled out from the inside.
Is provided. A taper 4 is formed on the outer periphery of the distal end of the fitting portion 38 of the plug 16 so that the distal end is gradually tapered.
0 is provided. The fitting portion 38 of the plug 7 is formed in a cylindrical shape, and the fitting portion 38 is provided with a concave portion 41 that is recessed in the axial direction from the distal end surface.

The plug 7 of the inner case 2 and the outer case 3
The plug 16 has the same shape and the same size as each other, and both can be made of polypropylene, polyethylene, or other synthetic resin by injection molding or the like using the same mold. The plugs 7 and 16 may be fixed to the inner case body 2 or the outer case body 3 by a fixing means such as an adhesive, or may be fixed only by fitting the fitting portions 32 and 38. You may make it. The opening 10 of the inner case 2 and the opening 19 of the outer case 3 are
In the illustrated example, the openings are circular. However, the openings 10 and 19 are not limited to the circles, but may be polygons such as triangles, squares, and pentagons, or ellipses and other shapes. In this case, the opening 1
The fitting portions 32 of the plugs 7, 16 corresponding to the shapes 0, 19,
The shape of 38 is also changed.

Next, the injection molding of the inner case 2 and the outer case 3 will be described. When the inner case body 2 is injection-molded, a pair of divided outer dies 43 and a hollow portion inside the inner case body 2 are formed as a molding die of the inner case body 2 as shown in FIG. And a pin portion 45a for forming the opening 10
Is used. A pair of outer dies 43
Are divided by the opposed corners 24 of the inner case body 2 and the inner surfaces of the pair of outer dies 43
3 are provided in a row.

Then, the synthetic resin material heated and melted is injected under pressure into the cavity 46 between the pair of outer dies 43 and the first core 44 and the second core 45, and the inner case body 2 is injected. Molding. Thereafter, the pair of outer dies 43 is opened (demolding).
At this time, the pin portion 45a of the second core 45
, It is possible to prevent the inner case body 2 from falling down when the mold is removed. Then, first from the inner case body 2 to the second core 45
Is removed, the opening hole 10 in the bottom wall 9 of the inner case body 2 is opened.
Since air can flow into the inside of the inner case body 2 from the opening hole 10, the inside of the inner case body 2 becomes negative pressure, and the side wall 8 of the inner case body 2 becomes wavy and wavy. Disappears, the first core 44 can be pulled out smoothly,
The inner case body 2 can be formed well, and the accuracy of the thickness of the inner case body 2 can be improved so that the thickness of each part of the inner case body 2 becomes uniform.

When the outer case body 3 is injection-molded, although not shown, as in the case of the inner case body 2, the outer case body 3 is formed by a pair of divided outer dies, A rectangular parallelepiped first core (pin) for forming a hollow portion inside the outer case body 3 and a second core having a pin portion for forming the opening 19 are used. A pair of outer molds
The outer case body 3 is divided by the opposed rectangular tube corner portions 28,
On the outer surface of the first core, a concave portion for forming the locking convex portion 25 of the outer case body 3 is provided. Then, the synthetic resin material that has been heated and melted is injected under pressure into the cavity between the pair of outer dies and the first and second cores, and the outer case body 3 is injection-molded. Thereafter, the pair of outer molds is opened (demolding).
At this time, since the outer case body 3 is supported by the pins of the second core, it is possible to prevent the outer case body 3 from falling down when the mold is removed.
After that, when the second core is removed from the outer case body 3 first, the opening 19 in the bottom wall 18 of the outer case body 3 is opened. Since air can flow into the inside of the body 3 from the opening 19, the inside of the outer case body 3 does not become negative pressure and the side wall 17 of the outer case body 3 does not become wavy and wavy. The first core can be smoothly removed from the outer case body 3 so that the outer case body 3 can be formed well and the thickness of each part of the outer case body 3 becomes uniform. The accuracy of the thickness of No. 3 can be improved.

As described above, since the accuracy of the thickness of the inner and outer cases 2 and 3 can be improved, the engagement portion 27 and the uneven row 23 can be formed.
And the holding force (axial locking force) between the engaging portion 27 and the concave / convex row 23 is also ensured, so that the inner and outer case bodies 2 and 3 can be prevented from accidentally coming off. According to the above embodiment, when the article 49 such as a drill chip is stored in the adjustable case 1, the article 49 such as a drill chip is stored in the inner case body 2 and the outer case is opened from the opening end side of the inner case body 2. By fitting the opening end side of the body 3 to the outside and sliding the outer case body 3 in the longitudinal direction with respect to the inner case body 2 to adjust the length of the adjustable case 1, each of the uneven rows 23 of the inner case body 2 is adjusted. In contrast, the engaging portions 27 of the outer case body 3 are repeatedly engaged and disengaged, so that the inner case body 2 and the outer case body 3 are positioned and held at desired telescopic positions. as a result,
With the article 49 sandwiched between the plug 7 of the inner case body 2 and the plug 16 of the outer case body 3, the article 49 can be stored and held in the adjustable case 1 without rattling.

On the outer surface of the side wall 8 of the inner case body 2, on both sides in the width direction deviating from the ridge line of the rectangular tube corner 24, there are provided uneven rows 23, and the side wall 1 of the outer case body 3 is provided.
The engaging portions 27 are provided on the inner surface of the inner surface 7 on both sides in the width direction deviating from the ridge line of the corner portion 28 of the rectangular tube. In the case, the engaging portion 27 of the outer case body 3
However, the engagement / disengagement of the concave / convex array 23 of the inner case body 2 is repeated. Can be moved away from the outer case body 3, so that the wear of the engaging portion 27 of the outer case body 3 can be prevented.
Of the inner case body 2 is sufficient.
And the outer case body 3 can be reliably positioned and held in the axial direction, thereby preventing the adjustable case 1 from being accidentally removed.

Further, on both sides in the width direction of the outer surface of the side wall 8 of the inner case body 2 deviating from the ridge line of the corner portion 24,
Since the uneven rows 23 are provided, and the engaging portions 27 are provided on both sides in the width direction of the inner surface of the side wall 17 of the outer case body 3 deviating from the ridge line of the corner portion 28, the inner case body 2 is provided.
The two irregularities 23 can be provided on one side wall 8 of each case, and two engaging portions 27 can be provided on one side wall 17 of the outer case body 3. The number of the uneven rows 23 and the engaging portions 27 can be doubled as compared with the case where the uneven rows 23 and the engaging portions 27 are provided on the corner portions 24 and 28 of the body 3 so as to straddle the ridge line. ,
Also from this point, the engaging force between the engaging portion 27 and the uneven row 23 after the adjustable case 1 is adjusted is doubled, and the positioning and holding of the inner case body 2 and the outer case body 3 can be reliably performed. It is possible to prevent the case 1 from being accidentally removed, and as a result, it is possible to prevent the article 49, for example, a drill chip, from being accidentally dropped, thereby preventing damage to the chip.

The inner case body 2 and the outer case body 3 are
Since the outer case body 3 is formed in the shape of a square tube having a square cross section, the outer case body 3 is rotated around the axis with respect to the inner case body 2 so that the opening end of the inner case body 2 and the outer case body 3 When the opening end side of the outer case body 3 is fitted to the opening end side of the outer case body 3 from the opening end side of the inner case body 2 together with the opening end, the outer case body 3 is overlapped with each side wall 8 of the inner case body 2. Side wall 17 can be arbitrarily selected. Therefore, when the outer case body 3 is externally fitted to the inner case body 2, the open end of the inner case body 2 and the open end of the outer case body 3 are positioned. The alignment is easier, and the inner case body 2 and the outer case body 3 can be easily combined.

The inner case body 2 is formed in a bottomed cylindrical shape integrally having a side wall 8 and a bottom wall 9, and an opening hole 10 is provided in the bottom wall 9 of the inner case body 2. The inner case body 2 is formed so that the plug body 7 formed separately from the
The outer case body 3 is formed in a bottomed cylindrical shape integrally having a side wall 17 and a bottom wall 18, and an opening hole 19 is provided in the bottom wall 18 of the outer case body 3. Since the plug 16 formed separately is attached to the outer case body 3 so as to close the opening hole 19, the inner case body 2 and the outer case body 3 are easily injection-molded as described above, Not only can the case body 2 and the outer case body 3 be formed well so as to improve the accuracy of the wall thickness, but also the gap between the inner case body 2 and the plug body 7 and the outer case body 3 when the adjustable case 1 is adjusted to expand and contract. The air flows into the inner case body 2 and the outer case body 3 from the gap between the inner case body 2 and the outer case body 3, and the air inside the inner case body 2 and the outer case body 3 flows out from these gaps to the outside. Between the inside and outside of the adjustable case 1 The circulation of air becomes favorable, comprising a telescopic adjustment of the adjustable casing 1 to be made smoothly with great resistance lighter without force by air pressure.

In addition, since the plugs 7 and 16 are formed separately from the inner case 2 and the outer case 3, the plugs 7 and 1 are separated.
6 can be formed of a material different from that of the inner case body 2 and the outer case body 3. For example, when the article 49 is stored and held in the adjustable case 1, the load of the article 49 is mainly controlled by the plug 7, 16, it is more easily damaged than the inner case body 2 and the outer case body 3. However, by forming the plug bodies 7 and 16 with a harder material than the inner case body 2 and the outer case body 3, The breakage of the adjustable case 1 can be prevented, and the durability of the adjustable case 1 can be improved from this point as well. In addition, the plug 7,1
6 is configured separately from the inner case body 2 and the outer case body 3, so that if the plugs 7 and 16 are damaged, the plugs 7 and 16 are damaged.
The inner case body 2 and the outer case body 3 can be used as they are by replacing only 16, which is economical.

The plugs 7 and 16 formed separately from the inner case body 2 or the outer case body 3 abut against the edges of the opening holes of the bottom walls 9 and 18 from the outside to form the opening holes 10 and 10. The plugs 7, 16 are provided with closing walls 31, 37 for closing the opening 19, and fitting portions 32, 38 projecting from the closing walls 31, 37 and being inserted into the opening holes 10, 19. Articles 49 stored in the adjustable case 1 are provided at the distal ends of the fitting portions 32 and 38.
The locking portions such as the concave portions 35 and 41 for locking both ends of the housing 49 can be easily formed so that the article 49 can be locked so as not to be unintentionally rattled. 2 and the outer case body 3 are separate from each other, so that the shape of the inner case body 2 and the outer case body 3 is not changed, and the engaging portion (the concave portion 35) has a shape corresponding to the article 49 stored in the adjustable case 1. , 41) can be easily and inexpensively formed on the plugs 7, 16 and are very convenient.

Engaging claws 33 and 39 are provided at the distal ends of the fitting portions 32 and 38 of the plugs 7 and 16 to engage with the opening edges of the opening holes 10 and 19 so as to prevent the opening holes 10 and 19 from coming off from the inside. Provided, the opening hole 1 of the inner case body 2 or the outer case body 3
The plugs 7 and 16 can be easily attached to the inner case body 2 or the outer case body 3 by inserting the fitting portions 32 and 38 into and through the fittings 0 and 19, respectively. 1
6 can be securely mounted so as not to be accidentally detached from the inner case body 2 or the outer case body 3. Further, tapered parts 34 and 40 are provided on the outer periphery of the distal ends of the fitting parts 32 and 38 of the plugs 7 and 16 so that the distal end side becomes gradually thinner, so that the inner case body 2 or the outer case body is provided. When the fitting portions 32 and 38 are inserted into the opening holes 10 and 19 of the third through the taper 32 and 38, the opening holes 10 and 19 are used.
The fitting portions 32 and 38 can be easily inserted through the
The plugs 7 and 16 can be easily attached to the inner case body 2 or the outer case body 3.

Further, the opening holes 10, 19 are gradually increased outward at the outer opening edges of the opening holes 10, 19 in the bottom walls 9, 18 of the inner case body 2 and the outer case body 3. Since the inclined tapers 11 and 20 are provided, the fitting portions 3 are inserted into the opening holes 10 and 19 of the inner case body 2 or the outer case body 3.
When the internal fittings 2 and 38 are inserted, the fitting portions 32 and 38 can be easily inserted into the opening holes 10 and 19 by using the tapers 32 and 38, and the plugs 7 and 16 can be inserted into the inner case. Body 2
Or, it can be easily attached by the outer case body 3.

In the embodiment of FIGS. 1 to 7,
The inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section, and the outer surfaces of all the side walls 8 of the inner case body 2
A pair of concavo-convex rows 23 is provided in each pair in the width direction, and a pair of engagement portions 27 are provided on the inner surfaces of all the side walls 17 of the outer case body 3, instead of the inner case body 2 and the outer case 3. The body 3 is formed in the shape of a square tube having a square cross section, and the outer surface of all the side walls 8 of the inner case body 2 is provided with a pair of concave and convex rows 23 in the width direction.
The pair of engaging portions 27 may be provided only in the inner surface of the pair. In this case, the opening ends of the inner case body 2 and the opening ends of the outer case body 3 are formed in spite of the fact that the engagement portions 27 are provided in a pair in the width direction only on the pair of opposed side walls 17 of the outer case body 3. When the outer end of the outer case 3 is fitted from the open end of the inner case 2 to the outer end of the outer case 3
Side wall 17 can be arbitrarily selected. Therefore, when the outer case body 3 is externally fitted to the inner case body 2, the open end of the inner case body 2 and the open end of the outer case body 3 are positioned. The alignment is simple, and the inner case body 2 and the outer case body 3 can be easily combined.

Further, the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section, and the engaging portions 27 are provided on the inner surface of all the side walls 17 of the outer case body 3 in a pair in the width direction. The pair of concave and convex rows 23 may be provided on the outer surfaces of the pair of opposed side walls 8 of the inner case body 2 in pairs in the width direction. Also in this case, a pair of opposed side walls 8 of the inner case body 2
Only when the concave and convex rows 23 are provided one by one in the width direction, the opening end of the inner case body 2 and the opening end of the outer case body 3 are aligned, and the outer case When the opening end side of the body 3 is externally fitted, the side wall 17 of the outer case body 3 that overlaps with each side wall 8 of the inner case body 2 can be arbitrarily selected. When the outer case body 3 is externally fitted to the outer case body 3, the opening end of the inner case body 2 and the opening end of the outer case body 3 can be easily aligned,
The inner case body 2 and the outer case body 3 can be easily combined.

Further, in the embodiment shown in FIGS. 1 to 7, the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section. The outer case body 3 may be formed in a rectangular tube shape having a rectangular cross section. In this case, the concavo-convex rows 23 are provided on the outer surface of all the side walls 8 of the inner case body 2 in pairs in the width direction, and
A pair of engaging portions 27 may be provided on the inner surfaces of all the side walls 17 of the outer case body 3 in a pair in the width direction, or the uneven rows 23 may be formed on the outer surfaces of the pair of opposite side walls 8 of the inner case body 2 in the width direction. A pair of engaging portions 27 may be provided on the inner surfaces of the pair of opposed side walls 17 of the outer case body 3 one by one in the width direction.

In short, in the case of the embodiment shown in FIGS. 1 to 7, the inner case body 2 and the outer case body 3 are formed in the shape of a rectangular tube, and one side wall 8 or a plurality of side walls 8 of the inner case body 2 are formed.
On the outer surface of the outer case body 3 (including all the side walls 17), a pair of uneven rows 23 are provided on the outer surface of the outer case body 3 (including all the side walls 17). The pair of engaging portions 27 in the width direction may be provided singly or plurally. 8 to 10 show another embodiment, in which the inner case body 2 and the outer case body 3 are formed in a square tubular shape having a square cross section, and a pair of side walls 8 of the inner case body 2 facing each other.
Are provided only on the outer surface of the
Is formed wide on the outer surface of the side wall 8 of the inner case body 2 in the width direction. Each locking projection 25 that constitutes the uneven row 23 is
It is formed in a straight line in the width direction of the side wall 8, and both ends in the width direction of each uneven row 23 reach the vicinity of the ridge line of the rectangular tube corner portion 24 of the side wall 8.

On the inner surface of all the side walls 17 of the outer case body 3,
The engaging portions 27 are provided one by one, and each of the engaging portions 27 is formed wide on the inner surface of the side wall 17 of the outer case body 3 in the width direction. Each of the engaging portions 27 is formed in a straight line in the width direction of the side wall 17, and both ends in the width direction of each of the engaging portions 27 reach near the ridge line of the corner portion 28 of the rectangular cylinder of the side wall 17. Other points are the same as those of the above-described embodiment. In this case, when the adjustable case 1 is expanded and contracted, the engaging portion 27 of the outer case body 3 repeatedly engages and disengages with the uneven row 23 of the inner case body 2. When engaging and disengaging, the uneven row 23 can move inward and outward by the elastic deformation of the inner case body 2 to escape, and as a result, abrasion of the engaging portion 27 of the outer case body 3 can be prevented. In addition, the engaging portion 27 that is wide in the width direction is engaged with the concavo-convex array 23 that is wide in the width direction, so that the engagement force between the engaging portion 27 and the concavo-convex array 23 after adjusting the expansion and contraction of the adjustable case 1 (the axial Stopping force) is sufficient, and the axial positioning and holding of the inner case body 2 and the outer case body 3 can be more reliably performed, and the accidental removal of the adjustable case 1 can be reliably prevented.

Also, in this case, since the uneven rows 23 are provided only on the pair of opposed side walls 8 of the inner case body 2, the pair of side walls 8 provided with the uneven rows 23 is transparent by the formation of the uneven rows 23. Although the articles 49 stored in the adjustable case 1 are difficult to see through the pair of side walls 8, the pair of side walls 8 without the uneven row 23 are difficult to see through.
Through the article 4 stored in the adjustable case 1
9 can be seen, and therefore, the article 49 stored in the adjustable case 1 can be easily checked from the outside. Moreover, the open end of the inner case body 2 and the outer case body 3
When the opening end side of the outer case body 3 is externally fitted from the opening end side of the inner case body 2 with the opening end of the inner case body 2,
Arbitrarily select the side wall 17 of the outer case body 3 that overlaps the inside and outside of each side wall 8 of the inner case body 2 even though the uneven rows 23 are provided only on the pair of opposed side walls 8. Therefore, the outer case body 3 is
Of the inner case body 2 and the outer case body 3
Positioning of the inner case body 2 and the outer case body 3 can be easily performed.

In the embodiment shown in FIGS. 8 to 10, the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section, and the inner surfaces of all the side walls 17 of the outer case body 3 are formed. , An engaging portion 27 is provided one by one, and the uneven surface 23 is provided on the outer surface of the pair of opposed side walls 8 of the inner case body 2. 8 are provided on the outer surface thereof with all the side walls 1 of the outer case body 3.
7 may be provided with one or more engaging portions 27 on the inner surface. In addition, the inner case body 2 and the outer case body 3
Is formed in the shape of a square tube having a square cross section, and the irregularities 23 are provided on the outer surfaces of all the side walls 8 of the inner case body 2, and only the inner surfaces of a pair of opposed side walls 17 of the outer case body 3 The engagement portions 27 may be provided one by one or a plurality of them.
In this case, the opening ends of the inner case body 2 and the opening ends of the outer case body 3 are formed in spite of the fact that the engagement portions 27 are provided in a pair in the width direction only on the pair of opposed side walls 17 of the outer case body 3. When the opening end side of the outer case body 3 is fitted from the opening end side of the inner case body 2 to the outside, the side wall 17 of the outer case body 3 that overlaps with each side wall 8 of the inner case body 2 in and out. Can be arbitrarily selected. Therefore, when the outer case body 3 is externally fitted to the inner case body 2, the opening end of the inner case body 2 and the opening end of the outer case body 3 can be easily aligned. Thus, the inner case body 2 and the outer case body 3 can be easily combined.

Further, in the embodiments shown in FIGS. 8 to 10, the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section. The outer case body 3 may be formed in a rectangular tube shape having a rectangular cross section. In this case, the concavo-convex array 23 may be provided on the outer surface of all the side walls 8 of the inner case body 2, and the engaging portions 27 may be provided on the inner surface of all the side walls 17 of the outer case body 3. The concave and convex rows 23 may be provided on the outer surfaces of the pair of opposed side walls 8 of the body 2, and the engaging portions 27 may be provided on the inner surfaces of the pair of opposed side walls 17 of the outer case body 3.

In short, in the case of the embodiment shown in FIGS. 8 to 10, the inner case body 2 and the outer case body 3 are formed in the shape of a rectangular tube, and one side wall 8 or a plurality of side walls 8 of the inner case body 2 are formed.
On the outer surface of the outer case body 3 (including all the side walls 17), a wide row of irregularities 23 is provided on the outer surface of the outer case body 3 (including all the side walls 17). It is also possible to provide one or a plurality of wide engaging portions 27 in the width direction. 11 and 12 show another embodiment, in which the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section, and only the outer surface of one of the side walls 8 of the inner case body 2 has a width direction. A pair of concavo-convex rows 23 are provided, and the concavo-convex rows 23
Are provided in the longitudinal direction at both sides in the width direction deviating from the ridge line. The pair of concavo-convex rows 23 in the width direction is configured by arranging locking protrusions 25 in the longitudinal direction at regular intervals on the outer surface of the side wall 8 of the inner case body 2 as in the above-described embodiment. The locking projection 25 is provided with solid truncated pyramid-shaped projections at regular intervals on the outer surface of the side wall 8 of the inner case body 2.

On the inner surface of all the side walls 17 of the outer case body 15, there are provided a plurality (three in the illustrated example) of convex engaging portions 27 which are removably engaged with the pair of concave / convex rows 23 in the width direction. Are provided. Each engaging portion 27 is a pair of concave and convex rows 2 in the width direction.
The outer case body 3 is formed to be wide in the width direction on the inner surface of the side wall 17 so as to be engaged with and disengageable across the outer case body 3. Each engaging portion 27 is formed in a straight line in the width direction of the side wall 17, and both ends in the width direction of each engaging portion 27 are square corner portions 2 of the side wall 17.
8 near the ridge line. A plurality of engaging portions 27 are provided on the inner surface of one side wall 17 of the outer case body 3 at intervals in the longitudinal direction, and a pair of concave and convex rows 23 in the width direction are provided.
, A plurality of engaging portions 27 are simultaneously and detachably engaged. Each of the engaging portions 27 is provided with a solid truncated pyramid-shaped protrusion on the inner surface of the side wall 17 of the outer case body 3.

The fitting portions 32, 38 protruding from the closing walls 31, 37 of the plug 7 of the inner case body 2 and the plug 16 of the outer case body 3 are formed in solid pillar shapes. In this case, when the adjustable case 1 is expanded and contracted, the engaging portion 27 of the outer case body 3 is
When the engaging portion 27 is disengaged from the concave / convex array 23, the concave / convex array 23 can move inward and outward by the elastic deformation of the inner case body 2 and escape. As a result, the abrasion of the engaging portion 27 of the outer case body 3 can be prevented. In addition, the engaging portion 27 that is wide in the width direction is engaged across the pair of concave and convex rows 23 in the width direction, and the plurality of engaging portions 27 is simultaneously detachably engaged with the pair of concave and convex rows 23 in the width direction. Since the pair of concave / convex rows 23 are provided only on the outer surface of one side wall 8 of the inner case body 2, the engaging portion after the adjustable case 1 has been expanded and contracted is adjusted. The engagement force (axial locking force) between the protrusion 27 and the uneven row 23 is sufficient, and the axial positioning and holding of the inner case body 2 and the outer case body 3 can be performed more reliably. It is possible to surely prevent a dropout.

In this case, since a pair of uneven rows 23 in the width direction is provided only on the outer surface of one side wall 8 of the inner case body 2, the pair of side walls 8 provided with the uneven rows 23 is Although the permeability slightly deteriorates due to the formation of the protrusions 23, the article 49 housed in the adjustable case 1 can be seen through the other three side walls 8 not provided with the concave / convex rows 23. The article 49 stored in the case 1 can be checked very easily. Moreover, the open end of the inner case body 2 and the outer case body 3
When the opening end side of the outer case body 3 is externally fitted from the opening end side of the inner case body 2 with the opening end of the inner case body 2,
A pair of uneven rows 23 in the width direction is provided only on the outer surface of one side wall 8.
Is provided, the side wall 17 of the outer case body 3 that overlaps with each side wall 8 of the inner case body 2 can be arbitrarily selected. When the case body 3 is externally fitted, the opening end of the inner case body 2 and the opening end of the outer case body 3 can be easily aligned, and the inner case body 2 and the outer case body 3 can be easily combined. it can.

The article 49 is placed in the adjustable case 1.
When the plugs 7 and 1 are stored and held, the load of the article 49 is mainly received by the fitting portions 32 and 38 of the plugs 7 and 16.
6 are easily damaged, but the closing walls 31, 37 of the plug 7 of the inner case body 2 and the plug 16 of the outer case body 3.
Since the fitting portions 32, 38 protruding from the plugs are formed in solid columnar shapes, the strength of the fitting portions 32, 38 of the plugs 7, 16 is increased, and the plugs 7, 16 can be prevented, and from this point, the durability of the adjustable case 1 can be improved.

In the embodiment shown in FIGS. 11 and 12, the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section, and the inner surfaces of all the side walls 17 of the outer case body 3 are formed. , A plurality of engaging portions 27 are provided, and a pair of uneven rows 2 in the width direction is provided only on the outer surface of one side wall 8 of the inner case body 2.
3 is provided, but instead of this, a pair of widthwise irregularities 23 is provided on the outer surface of all the side walls 8 of the inner case body 2,
One or more engaging portions 27 may be provided on the inner surface of all the side walls 17 of the outer case body 3 so as to engage over the pair of uneven rows 23 in the width direction. The pair of concavo-convex rows 23 in the width direction is provided only on the outer surface of one side wall 8, and one or more engaging portions 27 are provided only on the inner surface of one side wall 17 of the outer case body 3. Is also good. In short, the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section, and the outer surface of one side wall 8 or a plurality of side walls 8 (including all the side walls 8) of the inner case body 2 is formed. The outer case body 3 is provided with a pair of uneven rows 23 in the width direction.
One side wall 17 or a plurality of side walls 17 (all side walls 1
7) may be provided on the inner surface of each of the plurality of engaging portions 27.

Further, in the embodiment shown in FIGS. 11 and 12, the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section. The outer case body 3 may be formed in a rectangular tube shape having a rectangular cross section. Also in this case, the inner case body 2 and the outer case body 3 are formed in the shape of a square tube having a square cross section, and one or more side walls 8 (including all the side walls 8) of the inner case body 2 are formed. On the outer surface, a pair of uneven rows 23 in the width direction is provided, and one side wall 17 or a plurality of side walls 1 of the outer case body 3 are provided.
7 (including all side walls 17), the engaging portions 27
May be provided one or more.

Further, in the examples shown in FIGS. 11 and 12, the engagement portion 27 is formed on the inner surface of one side wall 17 of the outer case body 3.
Are provided at intervals in the longitudinal direction, but the number of engaging portions 27 provided on the inner surface of one side wall 17 of the outer case body 3 is not limited to three, but is one, two, or three. Or four or more. FIG. 13 shows another embodiment, in which each of the concave and convex rows 23 corresponds to FIGS. 1 to 7 and FIGS.
As in the case of the embodiment of FIGS. 0, 11 and 12, the locking projections 25 are arranged at regular intervals on the outer surface of the side wall 8 of the inner case body 2 in the longitudinal direction. ,
The locking projection 25 is provided with a solid truncated pyramid-shaped protrusion on the outer surface of the side wall 8 of the inner case body 2 or truncated outward while keeping the thickness of the side wall 8 constant. Some are bulged in a pyramid shape, and these are arranged alternately. Therefore, the locking projections 25 of the uneven row 23 have a thickness substantially equal to the thickness of the side wall 8 of the inner case body 2 and a thickness larger than the thickness of the side wall 8 of the inner case body 2. Are provided alternately at predetermined intervals. Other points are the same as those shown in FIGS.
The configuration is the same as in the embodiments of FIGS. 10, 11, 12, and the like.

In this case, there are every other thin locking projection 25, and since the thin locking projection 25 is easily depressed inward by elastic deformation, the engaging portion 27 is formed in an uneven row. When engaging and disengaging 23, the wear of the engagement portion 27 is further reduced, whereby the engagement force between the engagement portion 27 and the uneven row 23 can be ensured. FIG. 14 shows another embodiment, in which a plurality of slits 51 are provided in the fitting portions 32, 38 of the plugs 7, 16 at intervals in the circumferential direction, and the fitting portions 32, 3 are provided.
8 makes it easy to expand and contract. Other points are the same as those in FIGS. 1 to 7, FIGS. 8 to 10, FIGS.
This is the same configuration as those of the embodiments. In this case, the fitting portions 3 are inserted into the opening holes 10 and 19 of the inner case body 2 or the outer case body 3.
When the internal fittings 2 and 38 are inserted, the fitting portions 32 and 38 can be reduced by elastic deformation and can be easily inserted into the opening holes 10 and 19, and after the insertion, the fitting portions 32 and 38 are elastically inserted. Enlargement by the restoring force can prevent the fitting portions 32 and 38 from accidentally withdrawing from the opening holes 10 and 19, and the plugs 7 and 1
6 can be more easily and reliably mounted on the inner case body 2 and the outer case body 3.

FIG. 15 shows another embodiment, and FIG.
1 and FIG. 12, the closing wall 3 of the plug 7 of the inner case body 2 and the plug 16 of the outer case body 3
The fitting portions 32, 38 protruding from the first, 37 are formed in a solid columnar shape. In this case, when the article 49 is stored and held in the adjustable case 1, the load of the article 49 is mainly received by the fitting portions 32 and 38 of the plugs 7 and 16, and thus the fitting portions 32 and 38 of the plugs 7 and 16. Is easily damaged,
Since the fitting portions 32, 38 are solid pillars, the plugs 7, 1
6, the strength of the fitting portions 32, 38 can be increased to prevent the plugs 7, 16 from being damaged due to the penetration of the article 49 or the like. In this respect, the durability of the adjustable case 1 can be improved. become. Other points are shown in FIG.
7, FIG. 8 to FIG. 10 and the like.

FIG. 16 shows another embodiment, in which the plug 7 of the inner case 2 and the plug 16 of the outer case 3 are connected to the bottom wall 9,
18 are brought into contact with the edge of the opening hole 18 from the outside, and the opening holes 10 and 19
Closing walls 31 and 37 for closing the opening, and fitting portions 32 projecting from the closing walls 31 and 37 and inserted into the opening holes 10 and 19 to be inserted therein.
38 and outer fitting portions 53 and 54 which are fitted to the ends of the inner case body 2 or the outer case body 3. 1 to 7, 8 to 10, and 1
The configuration is the same as that of the embodiment shown in FIG.

FIG. 17 shows another embodiment, in which a receiving member 5 for receiving an article 49 stored in an adjustable case 1 is shown.
The plugs 5, 56 are formed separately from the plug 7 of the inner case body 2 and the plug 16 of the outer case body 3, and are formed into cylindrical plugs 7, 1.
The receiving members 55 and 56 are fitted to the fitting portions 32 and 38 of No. 6. Other points are the same as in FIGS.
The configuration is the same as that of the embodiment shown in FIGS. 7, 8 to 10, 11 and 12. In this case, particularly, the receiving members 55,
By forming the 56 from polypropylene or other hard synthetic resin or other hard material, the plugs 7, 16 can be reinforced by the receiving members 55, 56, and the load of the article 49 stored in the adjustable case 1 can be received by the receiving members 55, 56. 5
By receiving at 6, the stoppers 7, 16 can be prevented from being damaged.

Note that FIG. 11, FIG. 14, FIG. 15, FIG.
Also in the case of the embodiment shown in FIG. 17, the plugs 7 and 16 may be fixed to the inner case body 2 or the outer case body 3 by a fixing means such as an adhesive. Alternatively, it may be fixed only by fitting of the fitting 38, the outer fitting portions 53 and 54, and the like. In the case of the embodiment of FIGS. 11 and 12, the embodiment of FIG. 15, or the embodiment of FIG.
As shown in FIG. 5 or FIG. 16, forming the concave portion 32A for radially positioning the tip of the article 49 in the fitting portions 32, 38 is advantageous because the article 49 can be prevented from swaying. The shape of the recess 32A may be a semicircle or a V-shape as shown in the figure.

In the above embodiment, the inner case 2
And the outer case body 3 is formed in a square or rectangular prismatic tube shape, but instead, the inner case body 2 and the outer case body 3 are formed in a pentagonal, hexagonal or other square tubular shape. You may. Further, the inner case body 2 and the outer case body 3 may be formed in a cylindrical shape having a circular or elliptical cross section. Further, in the above-described embodiment, the convex engaging portion 27 is provided on the inner surface of the side wall 17 of the outer case main body 15. However, the engaging portion 27 does not have to be convex. It is also possible to form a concave shape that engages with the 23 convex portions in a detachable manner.

Further, the inner case 2 and the outer case 3
May be an opaque resin instead of a transparent resin. When the plugs 7 and 16 are separate from the inner and outer case bodies 2 and 3,
When the plugs 7 and 16 are made of chromatic resin corresponding to the type of the article 49, the discrimination of the article 49 can be improved, which is advantageous. Moreover, when articles 49 such as drill chips of different dimensions and types are stored in the adjustable case 1 while they are stacked, when removing the stacked adjustable cases 1, the plugs 7, 16 are removed. Since it is possible to identify the type and the like of the article 49 stored in the adjustable case 1, the number of seals and the like for identifying the type and the like of the article 49 stored in the adjustable case 1 can be omitted by identifying the plugs 7 and 16. Can be.

However, the plugs 7 and 16 may be formed integrally with the inner and outer case bodies 2 and 3. Further, the inner case body 2 and the outer case body 3 may be blow-molded instead of injection molding.

[0052]

According to the present invention, a highly durable adjustable member capable of reliably positioning and holding the inner case member and the outer case member by engaging the engaging portion with the concave / convex array for a long period of time. Cases can be provided. The inner case body and the outer case body can be satisfactorily formed by injection molding by improving the accuracy of the thickness so that the thickness of each part becomes uniform.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

FIG. 2 is a side sectional view of the inner case main body.

FIG. 3 is a side sectional view of the outer case main body.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a sectional view taken along line BB of FIG. 2;

FIG. 6 is a sectional view taken along line CC of FIG. 3;

FIG. 7 is a cross-sectional view for explaining a method of injection molding the inner case body.

FIG. 8 is a cross-sectional view of an inner case body and an outer case body showing another embodiment.

FIG. 9 is a sectional view of the inner case body.

FIG. 10 is a sectional view of the outer case body.

FIG. 11 is a side sectional view showing another embodiment.

FIG. 12 is a sectional view taken along line DD of FIG. 11;

FIG. 13 is a side cross-sectional view of an uneven row portion of an inner case body according to another embodiment.

FIG. 14 is a side view of a plug showing another embodiment.

FIG. 15 is a side sectional view of an inner case body or an outer case body showing another embodiment.

FIG. 16 is a side cross-sectional view of an inner case body or an outer case body showing another embodiment.

FIG. 17 is a side cross-sectional view of a plug showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Adjustable case 2 Inner case body 3 Outer case body 7 Plug body 9 Bottom wall 10 Opening hole 11 Taper 16 Plug body 17 Side wall 18 Bottom wall 19 Opening hole 20 Taper 23 Concavo-convex row 24 Square cylinder corner 25 Locking convex 27 Joining part 28 Square tube corner part 31 Closing wall 32 Fitting part 33 Engaging claw 34 Taper 37 Closing wall 38 Fitting part 39 Engaging claw 40 Taper 51 Slit 55 Receiving member 56 Receiving member

Claims (2)

[Claims] 1. An adjustable case having an outer case body (3) externally fitted to an inner case body (2) and configured to be expandable and contractible, wherein an outer surface of a side wall (8) of the inner case body (2). An irregular row (23) is provided at a position deviated from the corner portion (24) of the rectangular tube, and at a position deviated from the corner portion (28) of the inner surface of the side wall (17) of the outer case body (3). The uneven row (2)
The adjustable case according to claim 3, further comprising an engaging projection (27) that is engaged with the engaging case in a detachable manner. 2. An adjustable case wherein an outer case body (3) is externally fitted to an inner case body (2) so as to be adjustable in expansion and contraction, wherein a bottom wall (9) of the inner case body (2) is provided. An adjustable case, characterized in that an opening (10) is provided in the bottom case (3) and an opening (19) is provided in the bottom wall (18) of the outer case body (3).