JP2022152938A - stationery case - Google Patents

Abstract

To provide a stationery case in which a cylindrical body is hard to be damaged even when a cap body is repeatedly attached to and detached from the cylindrical body.SOLUTION: A stationary case 1 of the present invention includes: a cylindrical body 10 that extends in an axis A direction and is provided therein with a storage hole 10d for storing an object to be stored; and a cap body 20 that has an outer cylindrical portion 21 detachably attached to one end side of the cylindrical body 10 in the axis A direction and extending in the axis A direction, an inner insertion shaft portion 22 extending in the axis A direction inside the outer cylindrical portion 21, and an end surface lid portion 23 connecting the outer cylindrical portion 21 and the inner insertion shaft portion 22 at one end side. When the cap body 20 is attached to the cylindrical body 10, the outer cylindrical portion 21 covers one end side of a body outer peripheral surface 10a in a state in which a gap d is provided between an outer inner peripheral surface 21b of the outer cylindrical portion 21 and the body outer peripheral surface 10a of the cylindrical body 10. The inner insertion shaft portion 22 is inserted into the storage hole 10d of the cylindrical body 10 in a state in which an inner insertion outer peripheral surface 22a of the inner insertion shaft portion 22 is fitted with a body inner peripheral surface 10b.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a stationery case such as a refill lead case for storing a lead for a mechanical pencil, for example.

In recent years, stationery cases, for example, replacement lead cases, which are made of synthetic resin and have a complicated structure, are often used (see, for example, Patent Document 1). On the other hand, from the viewpoint of environmental issues and preference for the warmth of natural materials, there is an increasing demand for refill cases that use natural materials such as wood instead of synthetic resins. When manufacturing a refill case using natural materials, a simple structure consisting of a wooden cylindrical main body that houses the refills and a cylindrical cap that covers the outlet for taking out the refills at one end of the cylindrical main body can be used. be done.

JP 2019-171801

However, in the case of a structure consisting of a wooden tubular body and a tubular cap body that covers an opening at one end of the tubular body for taking out refills, repeated attachment and detachment will damage the wooden tubular body, resulting in poor appearance. undermined.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a stationery case in which the tubular body is less likely to be damaged even when the cap body is repeatedly attached to and detached from the tubular body.

The present invention includes a tubular body extending in the axial direction and provided with a storage hole for storing an object to be stored, and an outer tubular portion detachable from one end side of the tubular body in the axial direction and extending in the axial direction. , an inner shaft portion extending in the axial direction inside the outer cylindrical portion, and an end surface lid portion connecting the outer cylindrical portion and the inner shaft portion at the one end side. and when the cap body is attached to the tubular main body, the outer tubular portion is in a state in which a gap is provided between the outer inner peripheral surface of the outer tubular portion and the main outer peripheral surface of the tubular main body. covers one end side of the outer peripheral surface of the main body, and the inner insertion shaft portion covers the inner peripheral surface of the tubular main body in a state where the inner outer peripheral surface of the inner insertion shaft portion is fitted to the inner peripheral surface of the tubular main body. It relates to a stationery case that is inserted into the storage hole.

Also, the tubular body is preferably made of wood or paper.

Further, a plurality of rib portions extending in the axial direction and protruding inward are provided on the inner peripheral surface of the exterior. is preferably close to or in contact with.

Moreover, it is preferable that the top portion of the rib portion, which is close to or abuts on the outer peripheral surface of the main body, is rounded.

Further, the cylindrical main body has a polygonal cross section in an orthogonal direction perpendicular to the axial direction of the outer peripheral surface of the main body, and the outer cylindrical portion has an outer outer peripheral surface and an outer inner peripheral surface in the orthogonal cross section that are: The rib portion is provided on the flat surface of the inner peripheral surface of the exterior, and when the cap body is attached to the tubular body, the rib portion is formed on the outer peripheral surface of the main body. Preferably, it is close to or abuts the flat side of the face.

Further, it is preferable that the inner insertion shaft portion is provided with a recessed groove extending in the axial direction along the outer peripheral surface of the inner insertion from the front end surface in the direction of insertion into the cylindrical main body.

Further, a cylindrical portion mounted on the other end side of the cylindrical main body in the axial direction, a truncated cone portion on one end side provided on the one end side of the cylindrical portion in the axial direction, and a cylindrical outer peripheral surface of the cylindrical portion and a substantially barrel-shaped breech plug body having a protrusion projecting radially outward from the outer peripheral surface of the cylinder. and two oblique sides extending from both ends of said orthogonal base, wherein the angle between said two oblique sides is 90 degrees or less, passing through said axis and on said axis The shape of the axial cross-section along the cylinder has an axial bottom along the outer peripheral surface of the cylinder, one end oblique side extending from the one end of the axial bottom, and the other end extending from the other end of the axial bottom. and an oblique side, wherein the angle between the axial base and the one end oblique side is 45 degrees or less, and the angle between the axial base and the other end oblique side is 90 degrees or more. is preferred.

Further, the other end side frustum portion provided on the other end side in the axial direction of the cylindrical portion is further provided, and the other end side oblique side in the cross section in the orthogonal direction is the same as the cylindrical portion and the other end side frustum portion. preferably extends from the boundary of the

Further, on the other end side of the body inner peripheral surface of the tubular body, at a position corresponding to the length of the tail plug in the axial direction from the end of the tubular body on the other end side, It is preferable that a stepped portion is provided so that the inner peripheral surface of the main body has a larger diameter on the other end side.

According to the present invention, it is possible to provide a stationery case in which the cylindrical body is less likely to be damaged even when the cap body is repeatedly attached to and detached from the cylindrical body.

1 is an overall perspective view of a stationery case 1. FIG. 1 is an exploded perspective view of a stationery case 1; FIG. It is a cross-sectional perspective view of the cap body 20, and the cylindrical main body 10 is shown with a dotted line. It is a perspective view of the cap body 20, (a) is the cap body 20 of embodiment, (b), (c), (d) is cap bodies 20A, 20B, and 20C of a modification. 3 is a partial cross-sectional perspective view showing an exterior inner peripheral surface 21b of the cap body 20. FIG. It is a cross section in the orthogonal direction when one end side of the stationery case 1 is viewed from the position B indicated by the dotted line in FIG. FIG. 3 is a perspective view of the cap body 20 when the end surface lid portion 23 is viewed from one end side; (a) shows the tail plug body 30 of the embodiment, and (b) shows the tail plug body 30A of the modified example. FIG. 3 is a plan view of the tail plug body 30 as seen from the other end side, in which (a) is the tail plug body 30 of the embodiment, (b) to (f) are the tail plug bodies 30B, 30C, 30D, and 30E of the modified examples; 30F. FIG. 3 is a cross-sectional view of the tail plug body 30 attached to the tubular body 10, where (a) is the tail plug body 30 and the tubular body 10 of the embodiment, and (b) is the tail plug body 30G and the tube of a modified example. 10G.

A stationery case 1 according to an embodiment of the present invention will be described below. FIG. 1 is an overall perspective view of a stationery case 1. FIG. FIG. 2 is an exploded perspective view of the stationery case 1. FIG. In the following description, as the stationery case 1, a replacement lead case for storing a replacement lead of a mechanical pencil as an object to be stored will be described as an example. However, the present invention is not limited to this, and may store items other than refills.

(Stationery case 1)
The stationery case 1 includes a tubular main body 10 for accommodating a refill, a cap body 20 that can be attached to and detached from the refill outlet side that is one end side of the tubular main body 10 in the direction of the axis A, and the tubular main body 10. and a tail plug body 30 attached to the other end side in the direction of the axis A. In the specification, as shown in FIG. 1, the side of the stationery case 1 to which the cap body 20 is attached is referred to as one end side, and the side to which the tail plug body 30 is attached is referred to as the other end side.

(cylindrical main body 10)
The tubular body 10 is a tubular member that extends in the direction of the axis A and has a housing hole 10d along the axis A provided therein. The tubular body 10 has a hexagonal outline of the main body outer peripheral surface 10a, which is the outer peripheral surface of the tubular main body 10, in the cross section in the orthogonal direction perpendicular to the axis A, and the inner peripheral surface of the tubular main body 10, which is the inner peripheral surface of the tubular main body 10. The contour of the peripheral surface 10b is circular. In the embodiment, the cylindrical main body 10 is formed by bonding two plate-like members that extend in the direction of the axis A and have semicircular grooves in a cross section perpendicular to the axis A. However, the cylindrical main body 10 may be formed by forming the housing hole 10d in one rod-shaped member. In the embodiment, the main body outer peripheral surface 10a of the tubular main body 10 has a hexagonal contour, but the contour is not limited to this, and may be a polygon other than a hexagon or a circle. In the present specification, the term "polygon" includes not only polygons with pointed vertices but also polygons with slightly rounded vertices (formed with R at the vertices).

The size of the cross section in the orthogonal direction of the tubular body 10 is substantially the same as the cross section of a general pencil having a hexagonal outer peripheral surface. When housed in a case, there is a sense of unity.
In the embodiment, the tubular body 10 is made of wood from the viewpoint of environmental concerns and preference for the warmth of natural materials. The cylindrical main body 10 is made of wood, which is pleasant to the touch and excellent in appearance, but is softer than synthetic resin or metal and easily damaged.

(Cap body 20)
FIG. 3 is a cross-sectional perspective view of the cap body 20, showing the tubular body 10 in dotted lines. 4A and 4B are perspective views of the cap body 20, in which FIG. 4A shows the cap body 20 of the embodiment, and FIGS. is.
The cap body 20 includes an exterior tubular portion 21 that extends in the direction of the axis A while being attached to the tubular body 10, and an exterior tubular portion 21 that extends in the direction of the axis A inside the exterior tubular portion 21 and closes an opening on one end side of the tubular body 10. It includes an inner shaft portion 22 and an end surface lid portion 23 that connects the outer cylindrical portion 21 and the inner shaft portion 22 at one end side.

(Exterior cylinder portion 21)
The outer tubular portion 21 extends from the end surface lid portion 23 to the other end side in the axis A direction. An orthogonal cross section of an exterior outer peripheral surface 21 a that is the outer peripheral surface of the outer tubular portion 21 and an orthogonal direction cross section of an exterior inner peripheral surface 21 b that is the inner peripheral surface of the outer tubular portion 21 are both the body outer peripheral surface of the tubular main body 10 . It has a hexagonal shape similar to the orthogonal cross section of 10a.
The exterior tubular portion 21 is a molded component made of synthetic resin or the like that is harder than the wooden tubular main body 10 . An exterior inner peripheral surface 21b of the exterior cylindrical portion 21 has substantially the same size as the main body outer peripheral surface 10a of the tubular body 10 on one end side. However, in order to provide a necessary extraction taper so that the cap body 20 can be released from the mold, the size of the cross section in the orthogonal direction of the exterior inner peripheral surface 21b is slightly increased from one end side to the other end side. ing. Moreover, the thickness of the cross section in the orthogonal direction of the exterior outer peripheral surface 21a of the exterior cylindrical portion 21 is constant from one end side to the other end side.

The main body outer peripheral surface 10a of the cylindrical main body 10 has a constant size in the cross section in the orthogonal direction. Therefore, when the cap body 20 is attached to the tubular main body 10, as shown in FIG. A gap d is provided that increases from one end side to the other end side.

(Rib portion 24)
FIG. 5 is a partial cross-sectional perspective view showing the exterior inner peripheral surface 21b of the cap body 20. As shown in FIG. FIG. 6 is a cross section in the orthogonal direction when one end side of the stationery case 1 is viewed from the position B indicated by the dotted line in FIG. As shown in the figure, the exterior inner peripheral surface 21b is provided with a rib portion 24 extending in the axis A direction and protruding inward toward the axis A. As shown in FIG. In the embodiment, since the outer cylindrical portion 21 is hexagonal, it has six inner peripheral surfaces 21b, and the rib portions 24 are provided on every other three surfaces. The surfaces on which the rib portions 24 are arranged are not limited to three surfaces, but are preferably provided on a plurality of surfaces of the exterior inner peripheral surface 21b at even intervals. Moreover, when the exterior cylinder part 21 is circular, it is preferable that it is provided at equal intervals.

The top of the rib portion 24 is not sharp, and is rounded (predetermined R).
Further, as described above, the cross section of the exterior inner peripheral surface 21b in the orthogonal direction increases from one end side to the other end side in the direction of the axis A, so the distance between the exterior inner peripheral surface 21b and the axis A increases. However, the height of the rib portion 24 from the exterior inner peripheral surface 21b toward the axis A direction increases from one end side to the other end side in the axis A direction. It remains parallel to the axis A, and the distance x between the ridgeline of the rib portion 24 and the axis A is constant. This distance x is set to be slightly larger than the distance from the axis A to the main body outer peripheral surface 10a of the tubular main body 10 . As a result, when the cap body 20 is attached to the tubular body 10, a minute gap .DELTA.d smaller than d is formed between the ridgeline of the rib portion 24 and the outer peripheral surface 10a of the tubular body 10. As shown in FIG.

(Internally inserted shaft portion 22)
The inner insertion shaft portion 22 is a substantially cylindrical member that extends inside the outer cylindrical portion 21 from the end face cover portion 23 to the other end side in the axis A direction. The outer diameter of the inner insertion shaft portion 22 is the same as or slightly larger than the diameter of the housing hole 10d of the tubular main body 10 . An insertion outer peripheral surface 22a, which is an outer peripheral surface of the inner insertion shaft portion 22, is provided with a recessed groove 25 having a predetermined width extending from a tip end surface 22c in the direction of insertion into the cylindrical main body 10 toward one end side in the direction of the axis A. It is In the embodiment, three grooves 25 are provided so as to extend in three directions at equal intervals in the radial direction from the axis A to the insertion outer peripheral surface 22a.

(End face lid portion 23)
FIG. 7 is a perspective view of the end face cover portion 23 as seen from one end side. The end face lid portion 23 has an outer periphery formed in the same hexagonal plate shape as the outer outer peripheral surface 21a of the outer cylindrical portion 21, and a circular hole 23a having substantially the same diameter as the inner insertion shaft portion 22 is provided in the center. The outer tubular portion 21 extends from the outer edge portion of the end face lid portion 23 to the other end side in the axis A direction. The inserted shaft portion 22 extends toward the other end in the axis A direction from a position recessed from the hole 23 a of the end face cover portion 23 toward the other end in the axis A direction.
As shown in FIGS. 5 and 6 and the like, a ridge portion 26 is formed on the inner surface of the end face lid portion 23 . The ridge portion 26 extends from the inner surface side of the end face lid portion 23 toward the exterior inner peripheral surface 21b of the exterior cylindrical portion 21 from the hole 23a. The end portion of the protrusion 26 on the side of the hole 23 a is connected to the inner insertion outer peripheral surface 22 a of the inner insertion shaft portion 22 . As a result, one end of the inner insertion shaft portion 22 is fixed to the end surface cover portion 23 and held. However, since one end face of the inner shaft portion 22 is recessed from the hole 23a of the end face lid portion 23 to the other end side in the direction of the axis A, the end face lid portion 23 and the one end side of the inner shaft portion 22 are separated from each other. A ventilation part 27 is formed between the end surface cover part 23 and the part other than the connecting part by the ridge part 26 between the end surface and the end surface.

(Mounting of cap body 20)
The cap body 20 is attached from one end side of the tubular main body 10 so as to cover the one end side of the storage hole 10d of the tubular main body 10, which serves as a replacement lead outlet. Then, the outer cylindrical portion 21 of the cap body 20 covers the body outer peripheral surface 10 a of the cylindrical body 10 , and the inner insertion shaft portion 22 of the cap body 20 is inserted into the housing hole 10 d of the cylindrical body 10 .

At this time, as described above, the distance between the exterior inner peripheral surface 21b of the exterior tubular portion 21 of the cap body 20 and the main body outer peripheral surface 10a of the tubular main body 10 increases from one end side to the other end side. A gap d is provided. Therefore, the exterior inner peripheral surface 21b of the exterior tubular portion 21 of the cap body 20 does not press the body outer peripheral surface 10a of the tubular body 10 .

On the other hand, the outer diameter of the inner insertion shaft portion 22 of the cap body 20 is the same as or slightly larger than the diameter of the housing hole 10d of the cylindrical main body 10 . Therefore, the inner insertion shaft portion 22 of the cap body 20 and the housing hole 10d of the tubular main body 10 are fitted without a gap, and the cap body 20 is held by the tubular main body 10. As shown in FIG.
Further, in the embodiment, the inner insertion shaft portion 22 is provided with a groove 25, and the groove 25 extends from the tip surface 22c to one end side in the direction of the axis A. As shown in FIG. Since the insertion shaft portion 22 is made of synthetic resin, for example, as described above, it has a certain degree of elasticity. Therefore, when the inner shaft portion 22 is inserted into the housing hole 10d of the tubular main body 10, the one side and the other side of the inner shaft portion 22 across the groove 25 elastically approach each other, and the inner shaft portion 22 becomes smaller. That is, the size of the cross section of the insertion shaft portion 22 in the orthogonal direction is reduced. Therefore, the inner insertion shaft portion 22 can be easily inserted into the housing hole 10d of the cylindrical main body 10. As shown in FIG. Then, when the inner insertion shaft portion 22 is inserted into the housing hole 10d of the cylindrical main body 10, the inner peripheral surface 22a of the inner insertion shaft portion 22 is deformed by the restoring force of one side and the other side of the concave groove 25. Since the body inner peripheral surface 10 b of the cylindrical body 10 is pressed, the inner insertion shaft portion 22 is firmly held by the cylindrical body 10 . In addition, since the insertion outer peripheral surface 22a of the inner insertion shaft portion 22 presses the inner peripheral surface 10b of the main body, the pressing force is dispersed, and the depression of the inner peripheral surface 10b of the main body can be suppressed. Therefore, even if the cap body 20 is repeatedly attached to and detached from the cylindrical main body 10, the fitting force is less likely to decrease. Furthermore, the joint between the two plate members forming the tubular body 10 is less likely to break.

That is, the cap body 20 is held by the tubular main body 10 by the holding force of the inner insertion shaft portion 22 to the tubular main body 10 , while the external tubular portion 21 does not press the outer peripheral surface 10 a of the tubular main body 10 . Therefore, even if the cap body 20 is repeatedly attached to and detached from the tubular main body 10 , the outer tubular portion 21 is less likely to damage the body outer peripheral surface 10 a of the tubular main body 10 .

On the other hand, between the exterior inner peripheral surface 21b of the exterior tubular portion 21 and the main body outer peripheral surface 10a of the tubular main body 10, there is provided a gap d that increases from one end side to the other end side. A looseness may occur between the inner peripheral surface 21b and the main body outer peripheral surface 10a.
However, in the embodiment, the rib portion 24 is provided on the exterior inner peripheral surface 21b. Although the ridgeline of the rib portion 24 and the main body outer peripheral surface 10a do not contact each other, the minute gap Δd therebetween is smaller than the gap d between the exterior inner peripheral surface 21b and the main body outer peripheral surface 10a. That is, when the cap body 20 is attached to the cylindrical book 10, the rib portion 24 is close to the body outer peripheral surface 10a. Therefore, rattling when the cap body 20 is attached to the cylindrical main body 10 is suppressed.
When the cap body 20 is attached to and detached from the tubular main body 10, by providing the outer tubular part 21, a sufficient place for pinching with fingers can be secured without lengthening the cap body to one end side in the direction of the axis A. - 特許庁.

Even if the rib portion 24 were to come into contact with the outer peripheral surface 10a of the main body, the contact would be only at the top of the rib portion 24, and the top portion of the rib portion 24 would be rounded with a predetermined R in the cross section in the orthogonal direction. there is Therefore, since the contact area between the rib portion 24 and the main body outer peripheral surface 10a is small, the main body outer peripheral surface 20a of the cylindrical main body 10 is less likely to be damaged.

A ventilation portion 27 is formed in the end surface lid portion 23 of the cap body 20 . Therefore, even if an infant or the like swallows the cap body 20 by mistake, it is considered that there is no danger of suffocation.

(Modified example of cap body 20)
In the embodiment, the grooves 25 of the inner shaft portion 22 of the cap body 20 are three grooves extending radially from the axis A of the inner shaft portion 22 to the inner peripheral surface 22a as shown in FIG. 4(a). However, it is not limited to this, and the groove 25 may be provided as follows.
FIG. 4(b) is a perspective view of a cap body 20A as a modified example in which one groove 25 radially extends from the axis A of the insertion shaft portion 22 to the insertion outer peripheral surface 22a.
FIG. 4(c) is a perspective view of a cap body 20B as a modified example in which two grooves 25 radially extend from the axis A of the insertion shaft portion 22 to the insertion outer peripheral surface 22a. The two grooves 25 provided in the inner insertion shaft portion 22 of the cap body 20B are one continuous groove extending in the diameter direction on the same straight line.
FIG. 4D is a perspective view of a cap body 20C as a modified example in which four recessed grooves 25 radially extend from the axis A of the insertion shaft portion 22 to the insertion outer peripheral surface 22a. The four recessed grooves 25 provided in the inner insertion shaft portion 22 of the cap body 20C form one continuous recessed groove extending in the diametrical direction on the same straight line two by two. The two diametrically extending grooves are perpendicular to each other to form a cross.

(Tail plug body 30)
FIG. 8 is a side view of the tail plug body 30, where (a) shows the tail plug body 30 of the embodiment and (b) shows the tail plug body 30A of the modified example. FIG. 9 is a plan view of the tail plug body 30 viewed from the other end side, in which (a) is the tail plug body 30 of the embodiment, and (b) to (f) are the tail plug bodies 30B, 30C, and 30D of the modified examples. , 30E and 30F. FIG. 10 is a cross-sectional view of the tail plug 30 attached to the tubular body 10, where (a) is the tail plug 30 and the tubular body 10 of the embodiment, and (b) is a modification of the tail plug. 30G and tubular body 10G.

The tail plug body 30 is attached to the other end side of the tubular body 10 in the direction of the axis A. As shown in FIG. The tail plug body 30 includes a cylindrical portion 31 whose outer diameter is substantially equal to the diameter of the housing hole 10d of the tubular main body 10, a one end side truncated cone portion 32 provided at one end side of the cylindrical portion 31 in the direction of the axis A, and a cylindrical portion. A substantially barrel shape having a frustum 33 provided on the other end side of the axis A direction of the cylindrical portion 31 and a protrusion 34 provided radially outwardly protruding from the cylindrical outer peripheral surface 31a of the cylindrical portion 31. is. The tail plug body 30 is, but not limited to, a molded part made of a synthetic resin or the like that is harder than the wooden tubular body 10 .

The protrusion 34 has a triangular pyramid shape.
As shown in FIG. 9, when the tail plug body 30 is viewed from the other end side in the direction of the axis A, the projecting portion 34 has a base along a cylindrical outer peripheral surface 31a that is the outer peripheral surface of the cylindrical portion 31 and a base extending from the base. It is a substantially right or acute triangle having two extending oblique sides and a cross-sectional angle θ in the orthogonal direction between the oblique sides of 90 degrees or less. Note that the base is not strictly a straight line because it runs along the cylindrical outer peripheral surface 31a, but is described here as a substantially straight line.

10, the projection 34 has a base along the cylindrical outer peripheral surface 31a and a triangular vertex of the axial cross section from one end side of the cylindrical portion 31. and the other oblique side extending from the other end of the cylindrical portion 31 to the vertex of the triangular cross section in the axial direction.

The insertion-side axial cross-sectional angle φ between the bottom side and the one-end oblique side in the insertion direction is 45 degrees or less. FIG. 8(a) shows an embodiment of the tail plug body 30 having a projection 34 with an insertion-side axial cross-sectional angle φ of about 30 degrees, but the present invention is not limited to this, and FIG. 8(b) shows it. Thus, the tail plug body 30A of the modified example having the protrusion 34 with the insertion side axial cross-sectional angle φ of about 45 degrees may be used.

In the axial cross section, the oblique side on the other end extends from the boundary line between the cylindrical portion 31 and the frustum portion 33 on the other end toward the vertex. The axial cross-sectional angle ψ between the oblique side and the base is preferably 90 degrees or more, and is 90 degrees in the embodiment.

(Attachment of tail plug body 30)
The tail plug body 30 is attached by being press-fitted into the housing hole 10 d of the tubular main body 10 from the other end side of the tubular main body 10 . The tail plug body 30 is made of synthetic resin or the like that is harder than wood. Therefore, when the tail plug body 30 is press-fitted into the housing hole 10d of the tubular main body 10, the protrusion 34 bites into the main body inner peripheral surface 10b of the tubular main body 10, deforms the main body inner peripheral surface 10b, and moves into the housing hole 10d. being inserted.

At this time, in the axial cross section, the protruding portion 34 is a triangle having an insertion side axial cross section angle φ of 45 degrees or less between the base on the one end side in the insertion direction and the oblique side on the one end side. That is, since the angle of the insertion direction is small, the tail plug body 30 is smoothly inserted into the housing hole 10d of the hole of the cylindrical main body 10. As shown in FIG.
Further, the deformation of the inner peripheral surface 10b of the main body is limited to the portion that is bitten by the protrusion 34. As shown in FIG. Therefore, unlike normal press-fitting in which the entire outer peripheral surface of the breech plug body 30 presses against the main body inner peripheral surface 10b without the protrusion 34, the tensile stress that continues to be applied to the main body inner peripheral surface 10b after driving is applied to the main body inner peripheral surface 10b. Since it can be minimized to only the portion deformed by 34, the possibility of cracking of the tubular body 10 can be reduced.
Moreover, since the protruding portion 34 is a substantially triangular shape having a right angle or an acute angle with a cross-sectional angle .theta. It is also possible to reduce breakage of the joints of the two plate-like members forming the tubular body 10 .

Since the protrusion 34 deforms and bites into the main body inner peripheral surface 10b, the tail plug body 30 is firmly fixed to the tubular main body 10 and held. Therefore, there is no need to use an adhesive, and the number of assembly steps can be reduced.

Furthermore, since the tail plug body 30 is press-fitted into the housing hole 10d of the tubular main body 10, the external appearance of the tubular main body 10 is not damaged and the appearance is not spoiled.

Further, since the other end side axial cross-sectional angle ψ is 90 degrees or more, when the tail plug body 30 is inserted into the body inner peripheral surface 10b of the cylindrical body 10, the other end side of the protrusion 34 The oblique side bites into the main body inner peripheral surface 10b of the tubular main body 10 to prevent the breech plug body 30 from coming off.

In addition, when the tail plug body 30 is molded with two molds separated at the boundary line between the cylindrical portion 31 and the other end side frustum portion 33, in the embodiment, the other end side axial cross section of the protrusion 34 Since the angle ψ is 90 degrees, molding is easy.

(Modified example of tail plug body 30)
FIGS. 9A to 9F are views of the tail plug body 30 of the embodiment and the tail plug bodies 30B, 30C, 30D, 30E, and 30F of the modified examples as viewed from the other end side.
FIG. 9(a) shows a tail plug 30 of the embodiment, and FIGS. 9(b) and 9(c) show tail plugs 30B and 30C having different cross-sectional angles .theta. In the embodiment of FIG. 9(a), the orthogonal cross-sectional angle θ of the protrusion 34 of the breech plug body 30 is about 90 degrees. Although the present invention is not limited to 90 degrees, 90 degrees or less is preferable. For example, as shown in the modified example of FIG. Alternatively, as shown in the modified example of FIG. 9(c), the orthogonal cross-sectional angle θ of the protrusion 34 of the breech plug body 30B may be about 30 degrees.

9(d) to (f) show tail plug bodies 30D, 30E and 30F having different numbers of projections 34. FIG. Although the tail plug body 30 of the embodiment of FIG. 9(a) has three projections 34, it is not limited to this, and a plurality of projections 34 may be provided. The tail plug body 30D of the modification shown in FIG. 9(d) has two protrusions 34, and the tail plug body 30D of the modification shown in FIG. 9(e) has four protrusions 34. The tail plug body 30F of the modified example of d) has six protrusions 34 . However, it is preferable that the protrusions 34 are evenly arranged on the outer circumference of the columnar section 31 in the cross section in the orthogonal direction, and three or more protrusions 34 are preferably arranged.

FIG. 10(a) shows an embodiment in which the diameter of the storage hole 10d of the tubular body 10 is constant from one end to the other end, but the present invention is not limited to this.
For example, as shown as a modification in FIG. The step portion 10c may be provided so that the diameter on the end side becomes larger. Then, the diameter of one end of the truncated cone portion 32 on the one end side of the tail plug body 30G is equal to the diameter of the large diameter portion of the housing hole 10d on the inner peripheral surface 10b of the main body 10b on the one end side sandwiching the stepped portion 10c, and the diameter of the other end. and the diameter of the small diameter portion of the
10(b), when the tail plug 30G is driven into the housing hole 10d from the other end of the tubular main body 10G, the frusto-conical portion 32 on the one end side of the tail plug 30 The surface on the one end side abuts on the step portion 10c. Therefore, the tail plug body 30 can be positioned, and the surface on the other end side of the tail plug body 30 can be made flush with the surface on the other end side of the tubular main body 10 .

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible.
For example, in the above-described embodiments, the tubular body is made of wood, but the present invention is not limited to this. That is, the cylindrical main body may be made of paper or made of a softer synthetic resin than the cap body and the tail plug body. Moreover, when a tail plug is not used, a bottomed cylindrical main body may be used.
Further, in the embodiment, when the cap body 20 is attached to the cylindrical book body 10, the rib portion 24 is brought close to the main body outer peripheral surface 10a, but the present invention is not limited to this. That is, when the cap body 20 is attached to the cylindrical book 10, the rib portion 24 may be brought into contact with the body outer peripheral surface 10a.

θ Cross-sectional angle in the orthogonal direction φ Cross-sectional angle in the axial direction on the insertion side ψ Cross-sectional angle in the axial direction on the other end side A Axis 1 Stationery case 10 Cylindrical main body 10a Main body outer peripheral surface 10b Main body inner peripheral surface 10c Step 10d Storage hole 20 Cap body 21 Exterior Cylindrical portion 21a Exterior outer peripheral surface 21b Exterior inner peripheral surface 22 Insertion shaft portion 22a Insertion outer peripheral surface 22c Tip surface 23 End face lid portion 23a Hole 24 Rib portion 25 Groove 26 Ridge portion 27 Ventilation portion 30 Tail plug body 31 Cylinder Part 31a Cylindrical outer peripheral surface 32 One end side truncated cone part 33 Other end side truncated cone part 34 Projection

Claims (9)

a cylindrical main body extending in the axial direction and provided with a storage hole for storing a stored object;
an outer cylindrical portion that is detachable from one end side of the cylindrical main body in the axial direction and extends in the axial direction; an inner insertion shaft portion that extends in the axial direction inside the outer cylindrical portion; a cap body having an end surface lid portion that connects with the inner shaft portion at the one end side,
When the cap body is attached to the tubular body,
The outer cylindrical portion covers one end side of the outer peripheral surface of the main body with a gap provided between the inner outer peripheral surface of the outer outer peripheral surface of the outer cylindrical portion and the outer peripheral surface of the main body of the tubular main body,
The inner insertion shaft portion is inserted into the housing hole of the tubular main body in a state where the inner peripheral surface of the inner insertion shaft portion is fitted to the main inner peripheral surface of the tubular main body,
Stationery case. The tubular body is made of wood or paper,
The stationery case according to claim 1. A plurality of rib portions extending in the axial direction and protruding inward are provided on the inner peripheral surface of the exterior,
When the cap body is attached to the tubular body,
The rib portion is in proximity to or in contact with the outer peripheral surface of the main body,
The stationery case according to claim 1 or 2. A top portion of the rib portion that is in proximity to or abuts on the outer peripheral surface of the main body is rounded,
The stationery case according to claim 3. the cylindrical main body has a polygonal cross section in an orthogonal direction perpendicular to the axial direction of the outer peripheral surface of the main body,
In the outer cylindrical portion, the cross section in the orthogonal direction of the exterior outer peripheral surface and the exterior inner peripheral surface is the same polygon as the outer peripheral surface of the main body,
The rib portion is provided on a flat surface of the inner peripheral surface of the exterior,
When the cap body is attached to the tubular body, the rib portion is in proximity to or abuts on a flat surface of the outer peripheral surface of the body.
A stationery case according to claim 3 or claim 4. The insertion shaft portion is provided with a concave groove extending in the axial direction along the insertion outer peripheral surface from the distal end surface in the direction of insertion into the tubular body,
The stationery case according to any one of claims 1 to 5. mounted on the other end side of the tubular body in the axial direction,
a cylindrical portion;
a one end side truncated cone portion provided on the one end side of the cylindrical portion in the axial direction;
a substantially barrel-shaped breech plug body having a projection projecting radially outward from the cylindrical outer peripheral surface of the cylindrical portion;
The protrusion is
The shape of the cross section in the orthogonal direction orthogonal to the axis of the cylindrical part is
a base in an orthogonal direction along the outer peripheral surface of the cylinder;
and two oblique sides extending from both ends of the orthogonal base,
The angle between the two oblique sides is a substantially triangle of 90 degrees or less,
The shape of an axial cross-section through and along the axis is
an axial base along the cylindrical outer peripheral surface;
a one-end oblique side extending from the one-end side of the axial bottom;
and an oblique side extending from the other end side of the axial bottom side,
The angle between the axial bottom side and the one-end oblique side is 45 degrees or less,
A triangle having an angle of 90 degrees or more between the axial base and the oblique side on the other end,
The stationery case according to any one of claims 1 to 6. further comprising a frustum portion on the other end side provided on the other end side of the cylindrical portion in the axial direction,
The oblique side on the other end side in the cross section in the orthogonal direction extends from a boundary portion between the cylindrical portion and the frustum portion on the other end side,
The stationery case according to claim 7. On the other end side of the body inner peripheral surface of the cylindrical body,
A stepped portion is provided at a position corresponding to the axial length of the breech plug from the other end of the tubular body so that the diameter of the inner peripheral surface of the main body at the other end becomes larger. is provided with
The stationery case according to claim 7 or 8.

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