JPH081236Y2 - Spool for seat roll - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a sheet roll spool for holding an end surface of a sheet roll formed by winding a sheet-like material such as a recording material.

<Prior Art> Various recording materials, various thin sheet-like materials such as films are wound around a core tube to form a so-called sheet roll, which is loaded and used in an image recording apparatus, a fax machine or the like. The sheet-like material formed into a sheet roll is pulled out by a conveying means such as a pair of nip rollers, cut into a predetermined length, and used for image recording or the like.

Here, for such a sheet roll, a sheet roll for holding the end face of the sheet roll for the purpose of protecting the end face of the sheet roll, preventing meandering of the drawn sheet, smoothly pulling out the sheet, positioning the sheet end face, etc. The spool may be loaded.

Spool for sheet roll (hereinafter referred to as spool)
Has a flange for abutting against and holding the end surface of the sheet roll, and the convex portion provided with the flange is fitted into the core tube of the sheet roll to be loaded into the sheet roll.

An example of such a spool is, for example, Shokai 62-20315.
No. 4 discloses a spool having a plurality of claw-shaped members engaged with the inner surface of the core tube on the flange, and Japanese Utility Model Laid-Open No. 64-43049 provides a flange with a cylindrical portion having a slit in the axial direction. There is disclosed a spool that is loaded into a sheet roll by inserting a truncated cone-shaped nut into the cylindrical portion to expand the cylinder and pressing the cylinder against the inner surface of the core tube.

<Problems to be Solved by the Invention> However, in the spool disclosed in Japanese Utility Model Laid-Open No. 62-203154, the spool is loaded by engaging the fixed claw-shaped member with the core tube of the sheet roll. Therefore, the engaging force varies depending on the variation of the inner diameter of the core tube, and there is a problem that it is difficult to load or is easily pulled out.

On the other hand, the spool disclosed in Japanese Utility Model Application Laid-Open No. 64-43049 can spread a cylinder according to the inner diameter of the core tube and press it against the inner wall of the core tube, so that the inner diameter of the core tube varies. Although there is no problem that the spool easily comes off, it is not possible to insert the nut into the cylinder when loading the spool by rotating the screw that engages with the nut, so it cannot be done with one touch. However, there is a problem in that it takes a lot of time to load and the workability is poor and it is not convenient.

An object of the present invention is to solve the above-mentioned problems of the prior art, and it is possible to load (fix) the sheet roll with a simple operation, for example, with one touch, and to prevent variations in the inner diameter of the sheet roll core tube. Even so, it is an object of the present invention to provide a spool for a sheet roll that can always be loaded with a substantially constant engaging force.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a sheet roll that fits into a core tube of a sheet roll formed by winding a sheet-like material and holds an end surface of the sheet roll. Which is a spool for a flange that comes into contact with the end surface of the sheet roll,
And a spool body having a circular convex portion to be inserted into the core tube of the sheet roll, and the sheet roll is pressed in the axial direction to be deformed in at least two circumferential directions perpendicular to the axial direction. A fixing spring arranged so that the two end portions in contact with the inside of the core tube of the sheet roll and the convex portion, a support plate engaging with a rear end portion of the fixing spring, and the sheet from the support plate. An engaging member having a connecting rod extending along the axial direction of the core tube in the roll end face direction and a rotating shaft substantially orthogonal to the connecting rod at an eccentric position, and parallel to the rotating shaft. The present invention provides a sheet roll spool having a convex curved surface at one end, and a lever for rotating the connecting rod in the sheet roll axial direction by rotating along this aspect.

Further, it is preferable that the fixed spring has a petal-like shape whose front end is opened.

<Embodiment> Hereinafter, a spool for a sheet roll according to the present invention will be described in detail with reference to a preferred embodiment shown in the accompanying drawings.

FIG. 1 is a schematic sectional view of the sheet roll spool of the present invention loaded into a sheet roll, and FIG. 2 is an exploded perspective view thereof.

Spool 10 for sheet roll in the illustrated example (hereinafter, spool
10) is loaded on the end surface of a sheet roll 14 (hereinafter, referred to as roll 14) formed by winding a long sheet A around a core tube 12, and basically includes a spool body 16 and It is composed of a fixed spring 18, an engaging member formed of a support plate 20 and a connecting rod 22, and a lever 24.

The sheet A to which such a spool 10 is applied is not particularly limited, and various long sheets such as a recording material such as a photosensitive material, a heat sensitive material, an ink ribbon, a transfer color film, an image receiving material, or the like. Any film-like material can be applied. Further, when it is desired not to damage the sheet A core portion of the roll 14, the roll 14 to which the spool 10 of the present invention is applied needs to have the core tube 12, but does not necessarily have the core tube 12. Alternatively, it may be formed by simply winding the sheet A.

In the illustrated example, the spool main body 16 is a disc-shaped member composed of a flange portion 26 and a convex portion 28.
The end face of the roll 14 is held by inserting the end face of the roll 14 into contact with the end face of the roll 14. Further, a through hole into which a connecting rod 22 described later is inserted is formed at the center of the spool body 16 (the convex portion 28).

Inside the core tube 12 of the convex portion 28 of the spool body 16 as described above, a fixing spring 18 for fixing the spool 10 to the roll 14 is provided.
Abut.

The fixed spring according to the present invention is provided with at least 2 in the circumferential direction perpendicular to this direction by pressing the roll 14 in the axial direction.
The core tube 12 inside and the convex portion 28
Is configured to abut.

As such a fixed spring, for example, at least 2
In the spool 10 of the illustrated example, a spring member having a shape in which the tip direction is opened having a number of leaf springs, and in a preferred embodiment, a large number of leaf springs arranged so that the tip direction is opened.
It has a petal-like shape composed of 30, 30, ... And is arranged inside the roll 14 such that the tip end portion thereof abuts on the convex portion 28. That is, in the spool 10 of the present invention, the fixed spring 18 is arranged so that the opening direction (tip) is directed toward the end face direction of the roll 14 (hereinafter referred to as the end face direction).

In the spool 10 of the illustrated example, when the roll 14 is loaded, the fixed spring 18 is pressed toward the end surface by an engagement member described later, so that the tip end portion of the fixed spring 18 is projected.
The spool (10) is fixed to the roll (14) by being slidably contacted with and spread out, and the tip end portion thereof presses the inner wall of the core tube (12).

The strength of the leaf springs 30 arranged on the fixed spring 18 is not particularly limited, and depending on the number and size of the leaf springs 30 to be deployed,
What has a good fixing force may be appropriately determined.

The fixed springs 18 may be composed of separate leaf springs 30 one by one, but are integrated on the rear end side (lower side in FIG. 2) in order to simplify the structure. Is preferred. Also, the number of leaf springs 30 may be two or more,
In order to properly fix the spool 10 to the roll 14, a leaf spring
The 30 are preferably arranged radially.

It should be noted that the fixed spring applied to the present invention is not limited to the one to which such a leaf spring is applied, and a donut-shaped air spring capable of expanding its diameter outwardly by being pressed by an engaging member described later. And so on.

The engaging member is composed of the support plate 20 and the connecting rod 22 as described above.

The support plate 20 contacts the rear end of the fixed spring 18 to
It is used to push the fixed spring 18 toward the end face when fixing 10.
In the illustrated example, it has a disc shape. Further, a through hole 32 into which the connecting rod 22 is inserted is formed at the center of the support plate 20. The shape of the support plate 20 is not limited to the disk shape in the illustrated example, and various shapes that can press the rear end portion according to the shape of the fixed spring 18 can be applied.

The connecting rod 22 is a rod-shaped member that engages with the support plate 20 described above, and in the illustrated example, the head 34 is engaged with the support plate 20 and is arranged so as to extend in the end face direction. In the vicinity of the tip of the connecting rod 22, there is formed a bearing hole 38 for pivotally supporting a turning shaft 36 of a lever 24 described later so as to be substantially orthogonal to the connecting rod 22.

The engaging member is not limited to the one composed of the support plate 20 and the connecting rod 22 which are separate bodies, and may be one formed integrally.

The lever 24 rotates itself to move the connecting rod 22 in the axial direction of the roll 14 to fix and open the spool 10, and has a convex curved surface parallel to the rotating shaft at one end, Along this phase, it rotates to move the connecting rod 22 in the axial direction of the roll 14 to fix and open the spool 10.
In the illustrated example, the lever 24 is provided so as to be supported by the convex portion 28 on the end face side of the roll 14 of the convex portion 28 of the spool body 16.

The lever 24 is configured to be rotatable in a bearing hole 38 of the connecting rod 22 along a convex surface around a pin-shaped rotating shaft 36 that is inserted substantially orthogonally to the connecting rod 22. In the present invention, the rotation center 40 (rotation shaft 36) of the lever 24 is the lever.
It is formed at a position eccentric with respect to the center in the lateral direction of 24. Therefore, when the lever 24 supported by the convex portion 28 is rotated, the rotation center 40 (rotation shaft 36) moves in the axial direction of the roll 14, and the connecting rod 22 also moves accordingly, and the support plate. 20
Presses (opens) the fixed spring 18.

In the illustrated spool 10, the spool 10 is rolled 14
When not fixed to the lever 24, the lever 24 is tilted leftward in the figure as shown by the dotted line in FIG.
Therefore, the rotation center 40 formed at the eccentric position is on the center side of the sheet roll 14 (below in the figure, the center side). That is, in this state, the connecting rod 22 is moving downward in the drawing, and the supporting plate 20 is moved as shown by the dotted line in FIG.
Moves toward the center side, and the fixed spring 18 is separated from the inner wall of the core tube 12.

When the lever 24 is rotated to the right in the drawing and tilted to the right as shown by the solid line in FIG. 1 to fix the spool 10, the rotation center 40 formed at the eccentric position is moved in the end face direction ( (Upward in the figure), the connecting rod 22 is also pulled along with it and moves in the end face direction. As a result, the support plate 20 that engages with the head portion 34 of the connecting rod also moves in the end face direction, and presses the fixed spring 18 in the end face direction. Here, the fixed spring 18 has a shape that opens toward the end face direction, and since the tip portion thereof is in contact with the convex portion 28, the tip portion of the fixed spring 18 is pressed by pressing. The protrusion 28 is slidably contacted and opened, and the tip of the fixed spring 18 is pressed against the inner wall of the core tube 12.
As a result, the spool 10 is fixed to the roll 14 (core tube 12), and the flange portion 26 of the spool body 16 holds the end surface of the roll 14.

The spool 10 of the present invention thus rolls the spool 10 by rotating the lever 24 to push the fixed spring 18 apart.
Since it is fixed to the (core tube 12), the spool 10 can always be surely fixed regardless of the variation in the inner diameter of the core tube 12. Also, this operation is not rotation of the screw etc.,
It is only necessary to rotate the lever 24, and the operability is also good.

When the spool 10 is released from the roll 14, the lever 24 is tilted again to the left in the drawing.

The seat roll spool according to the present invention has been described above in detail. However, the present invention is not limited to the above-described embodiments, and various improvements and changes can be made without departing from the gist of the present invention. Of course it's good.

<Effect of the Invention> As described in detail above, according to the spool for a seat roll of the present invention, regardless of the variation in the inner diameter of the core tube,
The sheet roll spool can always be reliably fixed to the sheet roll. Further, this operation can be performed with one touch only by rotating a predetermined lever instead of rotating the screw, and the operability for loading and unloading the spool for the sheet roll is very good.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a spool for a sheet roll according to the present invention. FIG. 2 is a schematic perspective view of the sheet roll spool shown in FIG. Explanation of code 10 …… Spool for seat roll, 12 …… Core tube, 14 …… Seat roll, 16 …… Spool body, 18 …… Fixed spring, 20
...... Support plate, 22 ...... Connecting rod, 24 ...... Lever, 26 ...... Flange part, 28 ...... Convex part, 30 ...... Leaf spring, 32 ...... Through hole, 34
...... Head, 36 …… Rotation axis, 38 …… Hole, 40 …… Rotation center, A …… Seat

Claims (1)

[Scope of utility model registration request] 1. A spool for a sheet roll that fits into a core tube of a sheet roll formed by winding a sheet-like material and holds an end surface of the sheet roll, the flange portion being in contact with the end surface of the sheet roll. And a spool main body having a circular convex portion that is inserted inside the core tube of the sheet roll, and deformed in at least two circumferential directions perpendicular to the axial direction by pressing the sheet roll axial direction, A fixing spring arranged so that the two end portions in the two directions come into contact with the inside of the core tube of the sheet roll and the convex portion, a support plate engaging with a rear end portion of the fixing spring, and An engaging member having a connecting rod extending along the axial direction of the core tube in the sheet roll end face direction, and a rotating shaft substantially orthogonal to the connecting rod at an eccentric position,
A sheet roll having a convex curved surface parallel to the rotation axis at one end, and a lever for rotating the connecting rod in the sheet roll axial direction by rotating along this phase. spool.