JP2010013217A - Shaft fixture for coreless roll paper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shaft fixture for coreless roll paper capable of surely supporting the coreless roll paper over the entire length by making a cylindrical core member for a core pipe an independent component and of easily mounting the coreless roll paper without limiting an inserting direction of the cylindrical core member into the coreless roll paper and without damaging the coreless roll paper. <P>SOLUTION: This shaft fixture includes the cylindrical core member 1 as an independent member to be attachably/detachably inserted into the coreless roll paper 9, a base end side mounting member 3 attachably/detachably fitted to one end of the cylindrical core member 1 and fixed to a base end part of a shaft 2 for this machine, and a distal end side mounting member 4 as an independent member attachably/detachably fitted to the other end of the cylindrical core member 1 and attachably/detachably mounted at a distal end part of the shaft 2 for the machine. In the cylindrical core member 1, elastic cylinder parts 11a capable of expanding and contracting in the radial direction are formed at both ends of a support cylinder part 10a formed in an intermediate part. A swollen part 17 is formed in a middle part of each of the elastic cylinder parts 11a. The base end side mounting member 3 and the distal end side mounting member 4 are fitted to the end parts of the cylindrical core member 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a coreless roll paper shaft fixture used for mounting coreless roll paper on a main machine (for example, a plotter or a large printer).

Conventionally, the present applicant has proposed a shaft fixing tool for coreless roll paper (see Patent Document 1).
This coreless roll paper shaft fixture has a coreless assembly comprising a shaft-side assembly in which a receiving member attached to one end of the coreless roll paper is fixed to the shaft for this machine, and a support tube that is inserted into the center hole of the coreless roll paper. A support tube side assembly fixed to a receiving member attached to the other end of the roll paper was provided.

In use, first, the support tube is inserted into the center hole of the coreless roll paper, and the support tube side assembly is attached to one end of the coreless roll paper.
Next, the machine shaft is inserted into the support tube from the tip, and the shaft-side assembly is attached to the other end of the coreless roll paper.

  However, in this conventional shaft fixture, the receiving member of the shaft-side assembly is directly fitted into the center hole of the coreless roll paper, so that there is a problem that the fitting portion is crushed or damaged.

  In addition, an unsupported space in which the coreless roll paper cannot be supported from the inside of the center hole is formed between the tip of the support tube and the receiving member of the shaft side assembly, so that the coreless roll paper is supported over the entire length. However, there is a problem that this support pipe is insufficient to have a function as a core pipe (core).

Further, when coreless roll paper is set in this machine, the winding end is determined to be on the lower side or the upper side. If the support tube is fixed to the receiving member as in the prior art, the support tube must be inserted from one of the ends determined by this machine, which limits the insertion direction of the support tube. There was a problem that mistakes occurred.
Japanese Patent Laid-Open No. 2007-1743

  The present invention makes it possible to reliably support the coreless roll paper from the inside of the center hole thereof over the entire length by making the cylindrical core member serving as the core tube (core) an independent component. There is no limitation in the insertion direction when inserting the coreless roll paper into the center hole of the coreless roll paper, and it is an object to provide a shaft fixing tool for coreless roll paper that can be easily attached without damaging the coreless roll paper. Yes.

In order to solve the above-mentioned problem, the shaft fixing tool for coreless roll paper of the present invention (Claim 1)
A shaft fixing tool for attaching the coreless roll paper (9) to the machine,
An independent member in which a support tube portion (10a) is formed in the intermediate portion and elastic tube portions (11a) are formed in both end portions, and is detachably inserted into the center hole (90) of the coreless roll paper (9). A cylindrical core member (1) as
A base end side mounting member (3) that is detachably fitted into one elastic cylinder portion (11a) of the cylindrical core member (1) and is fixed to the base end portion of the machine shaft (2). When,
The distal end side as an independent member that is detachably fitted into the other elastic tubular portion (11a) of the tubular core member (1) and is detachably attached to the distal end portion of the shaft (2) for the machine. A mounting member (4),
The elastic cylindrical portions (11a) and (11a) of both of the cylindrical core members (1) are formed so as to be expandable and contractable in the radial direction by slit-shaped cut portions (16) and (16) formed at the cylindrical end portions. And
The base end side mounting member (3) and the front end side mounting member (4) are respectively connected to the flange portion (30) that comes into contact with the end surface (91) of the coreless roll paper (9). An elastic fitting part (31) to be fitted into the elastic cylinder part (11a) is integrally formed,
The elastic fitting portion (31) is formed to be expandable / contractable in the radial direction, and an outer diameter before being fitted to the elastic cylindrical portion (11a) is slightly larger than an inner diameter of the elastic cylindrical portion (11a). The spring is formed to have a diameter and the spring strength of the elastic fitting portion (31) is set to be stronger than the spring strength of the elastic tube portion (11a).

The shaft fixing tool for coreless roll paper of the present invention (Claim 2)
The shaft fixing tool for coreless roll paper according to claim 1, wherein a bulge having a diameter slightly larger than an inner diameter of a center hole (90) of the coreless roll paper (9) is provided at a middle portion of the elastic tube portion (11a). It was set as the structure in which the part (17) was formed.

The shaft fixing tool for coreless roll paper of the present invention (Claim 3)
The shaft fixing tool for coreless roll paper according to claim 1 or 2, wherein the tubular core member (1) forms an intermediate tubular member (10) forming a supporting tubular portion (10a) and an elastic tubular portion (11a). End cylinder members (11) and (11) are formed, and the end cylinder members (11) and (11) are detachably connected to both ends of the intermediate cylinder member (10) in a tight fitting state. It was set as the composition.

A coreless roll paper shaft fixture according to the present invention (Claim 1) includes a cylindrical core member as an independent member, a proximal side mounting member fixed to the shaft for the machine, and a distal side mounting member as an independent member. It is equipped with.
In this way, since the cylindrical core member is formed as an independent member, the coreless roll paper can be reliably supported from the inside of the center hole over the entire length, and in particular, the remaining amount of the coreless roll paper is small, It is possible to prevent bending and crushing when the layer is thinned.

  In addition, since the base end side mounting member and the front end side mounting member are not directly fitted into the center hole of the coreless roll paper, but are fitted to both end portions (elastic cylindrical portions) of the cylindrical core member, the coreless roll Does not damage the paper.

When using the shaft fixing tool for coreless roll paper of the present invention, first, the cylindrical core member is inserted into the center hole of the coreless roll paper.
Since this cylindrical core member has a configuration in which similar elastic cylindrical portions are formed at both ends thereof, there is no limitation in the direction of insertion, and no mistake such as incorrect insertion occurs.

Next, the shaft for the main unit is inserted into the cylindrical core member from the distal end, and the base end side mounting member fixed to the shaft for the main unit is used as one (base end side) elastic cylinder portion of the cylindrical core member. Next, the front end side mounting member is fitted from the front end of the shaft for this machine, and the other end (front end side) of the cylindrical core member is attached to the other end portion.
The distal end side mounting member is formed in the same structure as the proximal end side mounting member, and the flange portion is brought into contact with the end surface of the coreless roll paper, and the elastic fitting portion is fitted into the elastic cylindrical portion of the cylindrical core member. It is attached to.

The elastic fitting portion is formed to be slightly larger in diameter than the inner diameter of the elastic cylindrical portion of the cylindrical core member, and is formed so as to be able to expand and contract in the radial direction.
Therefore, the elastic fitting part can be inserted into the elastic cylinder part without any trouble by the reduction of the diameter due to its elasticity.
Further, the elastic fitting portion is pressed against the inner peripheral surface of the elastic cylindrical portion by the urging in the direction of expanding the diameter by the elastic restoring force, and the spring strength of the elastic fitting portion is greater than the spring strength of the elastic cylindrical portion. Since the elastic fitting portion is strongly pressed against the inner peripheral surface of the elastic cylindrical portion by the biasing force in the direction of expanding the diameter by the elastic restoring force in the mounted state in which the elastic fitting portion is inserted. In order to strongly press the elastic cylinder part against the inner periphery of the center hole of the coreless roll paper, the coreless roll paper, the cylindrical core member, the distal end side mounting member and the base end side mounting member, and the shaft for this machine can be easily and reliably Can be attached and fixed integrally.

The shaft fixing tool for coreless roll paper of the present invention (Claim 2) has a diameter slightly larger than the inner diameter of the center hole of the coreless roll paper at the middle part of the elastic cylindrical part formed at both ends of the cylindrical core member. Is formed.
In this case, since the elastic cylindrical portion is formed so as to be able to expand and contract in the radial direction even if it has the bulging portion, the bulging portion can be inserted without hindrance by reducing the diameter due to its elasticity.
Further, in the inserted mounting state, the bulging portion is strongly pressed against the inner peripheral surface of the center hole of the coreless roll paper by urging the elastic restoring force in the direction of expanding the diameter. It becomes the state temporarily fixed in the hole, and can prevent the cylindrical core member from falling out of the center hole of the coreless roll paper in the subsequent handling.

In the shaft fixing tool for coreless roll paper of the present invention (Claim 3), the cylindrical core member is in a tightly fitted state where the end cylindrical member forming the elastic cylindrical portion is formed at both ends of the intermediate cylindrical member forming the support cylindrical portion. It is connected in a detachable manner.
As a result, the intermediate cylinder member can be formed of a paper tube, or the end cylinder member can be formed of a plastic tube, and the cylindrical core member can be manufactured at a low cost. If you incinerate, you can safely dispose of it in consideration of the environment.
The intermediate tube member does not necessarily need to be formed of a paper tube, and a plastic tube or a metal tube (stainless steel tube, aluminum tube, etc.) can be used. The end tube member is not limited to a plastic tube, and a metal tube Can be used.

  In addition, the cylindrical core member does not necessarily need to be formed by the intermediate cylindrical member and the end cylindrical member, but is formed in an integrated structure using a plastic tube, a metal tube, or the like in which elastic cylindrical portions are integrally formed at both ends of the supporting cylindrical portion. Of course you can.

  FIG. 1 is a cross-sectional view showing a procedure for mounting a shaft fixing member for coreless roll paper according to an embodiment of the present invention. FIG. 2 is an axial cross-sectional view showing a main part of a cylindrical core member in the shaft fixing tool for coreless roll paper. 3 is an axial cross-sectional view of the main part showing the mounting state of the coreless roll paper shaft fixing tool, FIG. 4 is an axial cross-sectional view of the main part showing the mounting state of the coreless roll paper shaft fixing tool, and FIG. It is an axial sectional view of the important section showing other examples of a core member.

  The shaft fixture of the present embodiment is for attaching the coreless roll paper 9 to this machine, for example, a plotter, a large printer, etc., and has a cylindrical core member 1 as an independent member and a base end of the shaft 2 for this machine. And a distal end side mounting member 4 (shown in FIG. 1- (D)) as an independent member.

The cylindrical core member 1 is detachably inserted into the center hole 90 of the coreless roll paper 9, and a supporting cylindrical portion 10a is formed at an intermediate portion thereof, and elastic cylindrical portions 11a and 11a are formed at both ends thereof. Is formed.
As shown in FIG. 1- (a), the tubular core member 1 of the embodiment is formed by an intermediate tubular member 10 that forms a support tubular portion 10a and an end tubular member 11 that forms an elastic tubular portion 11a. End cylinder members 11, 11 are detachably connected to both ends of the intermediate cylinder member 10 in a tight fitting state.

The intermediate cylinder member 10 (support cylinder part 10a) is formed of a straight paper tube (which may be a plastic tube or a metal tube).
The end tube member 11 (elastic tube portion 11a) is formed of a plastic tube (or a metal tube), and a fitting portion 13 for the end portion of the intermediate tube member 10 is formed via a stepped portion 12.
A chamfered portion 14 is formed on the inner peripheral surface of the front end of the fitting portion 13, thereby preventing a collision when the machine shaft 2 is inserted.
Further, a round chamfered portion 15 is formed on the outer peripheral end surface of the end cylindrical member 11, thereby preventing damage when being inserted into the coreless roll paper 9 and facilitating insertion.

Note that the outer diameter of the intermediate cylindrical member 10 is approximately 0.5 mm to 3 mm smaller than the inner diameter of the central hole 90 when the inner diameter of the central hole 90 of the coreless roll paper 9 is 40 mm to 70 mm. ing.
This is because insertion becomes impossible when the outer diameter of the intermediate cylinder member 10 is made equal to the inner diameter of the center hole 90 of the coreless roll paper 9, and if inserted forcibly, the inner circumference of the coreless roll paper 9 is damaged. End up.
If the outer diameter of the intermediate cylinder member 10 is too smaller than the inner diameter of the center hole 90 of the coreless roll paper 9, the function as a core tube (core) in which the coreless roll paper 9 is supported from the inside by the intermediate cylinder member 10 can be achieved. Because it disappears.

The end cylindrical member 11 is formed to be radially expandable / contractable by a slit-shaped cut portion 16 formed at the cylindrical end portion, and a central hole of the coreless roll paper is formed in the middle portion of the end cylindrical member 11. A bulging portion 17 (shown in FIG. 2) having a diameter slightly larger than the inner diameter is formed.
The outer diameter D1 of the bulging portion 17 is approximately 0.5 mm to 2 mm larger than the inner diameter D2 of the center hole 90 when the inner diameter D2 of the center hole of the coreless roll paper 9 is 40 mm to 70 mm. Has been.

The cut portions 16 are formed at four locations at equal intervals in the circumferential direction, and are formed in a slit shape from the end edge to a position beyond the step portion 12 at a slight angle with respect to the axial direction.
The cut portion 16 is not necessarily formed obliquely with respect to the axial direction, but by forming the cut portion 16 obliquely, a fitting piece 33 and an elastic fitting piece 35 described later are fitted into the cut portion 16. The expansion / contraction trouble of the end cylinder member 11 which arises by this can be prevented.
Moreover, it can make it easy to produce elasticity by forming to the position exceeding the step part 12. FIG.
The number of the cut portions 16 is not necessarily four, and may be one or four or more as long as the end tube member 11 can be elastic.

The base end side mounting member 3 is fixed to a base end portion of the machine shaft 2 by a locking claw (not shown), and the front end side mounting member 4 is for the machine as shown in FIG. The shaft 2 is detachably attached to the tip portion.
3 and 4 show the proximal-side mounting member 3, the distal-side mounting member 4 is formed in the same structure as the proximal-side mounting member 3. The detailed description about is omitted.

In the base end side mounting member 3, an elastic fitting portion 31 that fits into the end cylindrical member 11 of the cylindrical core member 1 is formed integrally with a flange portion 30 that is brought into contact with the end surface 91 of the coreless roll paper 9. .
The elastic fitting portion 31 is formed so as to be expandable / contractable in the radial direction, and the outer diameter D3 before being fitted to the end cylindrical member 11 is slightly larger than the inner diameter D4 of the end cylindrical member 11. Is formed.

In the embodiment, the bush portion 32 fitted to the shaft 2 for the machine, the fitting piece 33 extending in the axial direction on the outer periphery of the bush portion 32, and the outer periphery of the bush portion 32 are provided. An elastic fitting piece 35 is provided at the tip of the cantilever arm 34 so as to extend in the axial direction.
The bush portion 32 has elasticity that can be expanded and contracted in the radial direction by forming a notch portion 36 in a part thereof, and the fitting piece 33 has elasticity that can be expanded and contracted in the radial direction by the elasticity of the bush portion 32. The elastic fitting piece 35 has elasticity that can be expanded and contracted in the radial direction by the elasticity of the bush portion 32 and the elasticity of the cantilever arm 34.

The distal end sides of the fitting piece 33 and the elastic fitting piece 35 are gradually formed in a downward gradient, and can be smoothly fitted into the end cylindrical member 11 of the cylindrical core member 1 by being guided by this gradient.
The outermost diameter of the fitting piece 33 is substantially the same as the inner diameter of the end tube member 11 or larger by about 1 mm to 2 mm, and the outermost diameter D3 of the elastic fitting piece 35 is the inner diameter D4 of the end tube member 11. Is 30 mm to 60 mm, and is formed to have a diameter approximately 2 mm to 5 mm larger than the inner diameter D4.

  As described above, the elastic fitting portion 31 is formed so as to be expandable / contractable in the radial direction, and an outer diameter before being fitted to the end cylindrical member 11 (elastic cylindrical portion 11a) is the end cylindrical member. 11 (elastic cylinder part 11a) is slightly larger than the inner diameter, and the spring strength of the elastic fitting part 31 is set to be stronger than the spring strength of the end cylinder member 11 (elastic cylinder part 11a). Yes.

Next, the procedure for mounting the shaft fixture on the coreless roll paper 9 will be described with reference to FIG.
First, the end cylindrical members 11 and 11 of the cylindrical core member 1 are connected to both ends of the intermediate cylindrical member 10 of the cylindrical core member 1 to assemble the cylindrical core member 1 (FIG. 1A).

  Next, the cylindrical core member 1 is inserted into the center hole 90 of the coreless roll paper 9 (FIG. 1B). At this time, the cylindrical core member 1 can be inserted from either side of the both ends, The insertion direction is not limited, and no insertion error occurs.

  In addition, since the end cylindrical member 11 is formed so that the end cylindrical member 11 can be expanded and contracted in the radial direction, the cylindrical core member 1 can be inserted without hindrance by its elasticity, and in the mounted state, in the direction of increasing the diameter by the elastic restoring force. Since the bulging portion 17 is pressed against the inner peripheral surface of the center hole 90 of the coreless roll paper 9 by the urging force, the cylindrical core member 1 is temporarily fixed in the center hole 90 of the coreless roll paper 9, In subsequent handling, the cylindrical core member 1 can be prevented from falling off from the center hole 90 of the coreless roll paper 9.

  In addition, since the cylindrical core member 1 is formed as an independent member separate from the proximal end side mounting member 3 and the distal end side mounting member 4, the coreless roll paper 9 can be reliably placed over the entire length from the inside of the center hole 90. In particular, it is possible to prevent bending and crushing when the remaining amount of the coreless roll paper 9 is small and the winding layer becomes thin.

  Next, the machine shaft 2 is inserted into the cylindrical core member 1 from the distal end, and the proximal side mounting member 3 fixed to the machine shaft 2 is connected to one of the cylindrical core members 1 (the proximal side). ) Is fitted into the end cylindrical member 11 (FIG. 1C), and then the front end side mounting member 4 is fitted from the front end of the shaft 2 for the machine, and the fitting piece 33 of the front end side mounting member 4 and If the elastic fitting piece 35 is fitted into the other end (the tip side) cylindrical member 11 of the cylindrical core member 1 (FIG. 1-D), the shaft fixing tool can be attached to the coreless roll paper 9. .

In this case, the front end side mounting member 4 and the base end side mounting member 3 are mounted in a state in which the flange portion 30 is brought into contact with the end surface 91 of the coreless roll paper 9.
The elastic fitting portion 31 is formed to have a slightly larger diameter than the inner diameter of the end cylindrical member 11 of the cylindrical core member 1.
In this case, since the elastic fitting portion 31 is formed so as to be expandable / contractable in the radial direction, the fitting piece 33 and the elastic fitting piece 35 are inserted into the end tube member 11 without any trouble by the reduction of the diameter due to the elasticity. In addition, the tightening force of the bush portion 32 to the machine shaft 2 is strengthened, and the distal end side mounting member 4 and the proximal end side mounting member 3 are easily and securely fixed to the machine shaft 2. Can be made.

  Further, since the spring strength of the elastic fitting portion 31 is set to be stronger than the spring strength of the end tube member 11, the elastic restoring force is applied in the mounted state (FIG. 1-D) in which the elastic fitting portion 31 is inserted. The elastic fitting portion 31 is pressed against the inner peripheral surface of the end cylindrical member 11 by urging the diameter in the direction of expanding the diameter, and at the same time, the end cylindrical member 11 is placed on the inner periphery of the center hole 90 of the coreless roll paper 9. Because of the strong pressing, the coreless roll paper 9, the cylindrical core member 1, the distal end side mounting member 4, the proximal end side mounting member 3, and the machine shaft 2 can be mounted and fixed integrally and easily. .

  After the coreless roll paper 9 is mounted on the shaft fixture as described above, the machine shaft 2 is set at a predetermined location on the machine, and the roll paper is fed out in a normal usage method. It is.

  Further, the length of the cylindrical core member 1 is formed to be the same as the width of the coreless roll paper 9, but a length corresponding to the size of the coreless roll paper 9 may be prepared. As shown in the figure, the cylinders 1a and 1a can be connected to each other by the sleeve 8 so as to have a predetermined length, and the cylindrical core member 1 having such a connection structure by the sleeve 8 is also included in the present invention. Is included.

It is sectional drawing which shows the mounting procedure of the shaft fixing tool for coreless roll paper which concerns on the Example of this invention. It is an axial direction sectional view showing the important section of the cylinder core member in the shaft fixing tool for coreless roll paper. It is an axial sectional view of the principal part which shows the mounting state of the shaft fixing tool for coreless roll paper. It is an axial perpendicular direction sectional view of the important section showing the mounting state of the shaft fixing tool for coreless roll paper. It is an axial sectional view of the important section showing other examples of a cylindrical core member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tube core member 1a Tube body 10 Intermediate tube member 10a Support tube part 11 End tube member 11a Elastic tube part 12 Step part 13 Fitting part 14 Chamfering part 15 Round chamfering part 16 Cutting part 17 Expansion part 2 For this machine Shaft 3 Base end side mounting member 30 Flange portion 31 Elastic fitting portion 32 Bush portion 33 Fitting piece 34 Cantilever arm 35 Elastic fitting piece 36 Notch portion 4 Front end side mounting member 8 Sleeve 9 Coreless roll paper 90 Center hole 91 End face

Claims (3)

A shaft fixing tool for attaching the coreless roll paper (9) to the machine,
An independent member in which a support tube portion (10a) is formed in the intermediate portion and elastic tube portions (11a) are formed in both end portions, and is detachably inserted into the center hole (90) of the coreless roll paper (9). A cylindrical core member (1) as
A base end side mounting member (3) that is detachably fitted into one elastic cylinder portion (11a) of the cylindrical core member (1) and is fixed to the base end portion of the machine shaft (2). When,
The distal end side as an independent member that is detachably fitted into the other elastic tubular portion (11a) of the tubular core member (1) and is detachably attached to the distal end portion of the shaft (2) for the machine. A mounting member (4),
The elastic cylindrical portions (11a) and (11a) of both of the cylindrical core members (1) are formed so as to be expandable and contractable in the radial direction by slit-shaped cut portions (16) and (16) formed at the cylindrical end portions. And
The base end side mounting member (3) and the front end side mounting member (4) are respectively connected to the flange portion (30) that comes into contact with the end surface (91) of the coreless roll paper (9). An elastic fitting part (31) to be fitted into the elastic cylinder part (11a) is integrally formed,
The elastic fitting portion (31) is formed to be expandable / contractable in the radial direction, and an outer diameter before being fitted to the elastic cylindrical portion (11a) is slightly larger than an inner diameter of the elastic cylindrical portion (11a). A shaft fixing tool for coreless roll paper, which is formed in a diameter and has a spring strength of the elastic fitting portion (31) set stronger than that of the elastic tube portion (11a).   The shaft fixing tool for coreless roll paper according to claim 1, wherein a bulge having a diameter slightly larger than an inner diameter of a center hole (90) of the coreless roll paper (9) is provided at a middle portion of the elastic tube portion (11a). A shaft fixing tool for coreless roll paper in which the portion (17) is formed. The shaft fixing tool for coreless roll paper according to claim 1 or 2, wherein the tubular core member (1) forms an intermediate tubular member (10) forming a supporting tubular portion (10a) and an elastic tubular portion (11a). End cylinder members (11) and (11) are formed, and the end cylinder members (11) and (11) are detachably connected to both ends of the intermediate cylinder member (10) in a tight fitting state. Coreless roll paper shaft fixture.

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