JP3032435U - Roll core holder - Google Patents

Abstract

(57) [Abstract] (Corrected) [PROBLEMS] A roll paper tube fixing device that allows a roll to be easily attached to a paper tube and has a simple structure and can be firmly fixed without sagging during use. SOLUTION: A roll paper tube fixing device is composed of two discs each having a hole 1 and a hole 2 in the center thereof, and an outer ring 3 and an inner ring 4 which are configured to be fitted to each other in a slidable state.
And a cut portion 16 is provided on the inner peripheral surface of the hole of the outer ring 3, while one portion of the inner ring 4 is cut to form a C-shape.
A leaf spring is attached to the notch, and a recess is provided on the outer peripheral surface of the inner ring 4 for the ball 22 to fit.
A ball 22 is inserted between the inner ring 4 and the inner ring 4, and a pin 19 is attached to the surface of the inner ring 4.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a roll holder for a machine body, which is a roll attached to a cloth wound around a paper tube, a printer for printing on paper, a label printer for a label wound on a roll, a label sticking machine, and those winders. The present invention relates to a roll paper tube fixing device for fixing to a core rod.

[0002]

[Prior art]

 Conventionally, as shown in FIG. 5, in order to fix the roll 11 wound around the paper tube to the core rod 13 for the roll holder, a ring 26 is put on the roll 11 and inserted into the core rod 13 of the machine body. , Tighten the knob or bolt 24 attached to the ring 26 to fix it to the core rod 13, or make the core rod 13 have a leaf spring or a bend so that the diameter is larger than the hole diameter of the paper tube of the roll 11. The round bar 27 is attached, and when the paper tube of the roll 11 is inserted into this, it can be fixed by the spring action.

[0003]

[Issues to be solved by the device]

 However, each time the roll wound around the paper core was attached to or removed from the core rod, the knobs and bolts had to be tightened and loosened, which was troublesome and time-consuming.

On the other hand, in the method of inserting into a leaf spring or a curved round bar, it is necessary to attach them to the core bar, which not only complicates the structure but also makes it hard to insert when inserting. , There was a problem such as loosening during use.

The present invention was made in order to solve the above-mentioned conventional problems. The purpose of the present invention is to allow a roll to be easily attached and to have a simple structure so that it does not sag during use. The purpose of the present invention is to provide a roll paper tube fixing device that can be fixed firmly without doing so.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the roll paper tube fixing device of the present invention comprises two discs having a hole in the center thereof, which are composed of an outer ring and an inner ring configured to be fitted to each other. These materials may be either resin or metal. The outer peripheral surface of the inner ring is configured to be slidable and rotatable along the inner peripheral surface of the hole of the outer ring. Further, a notch is provided on the inner peripheral surface of the hole of the outer ring. The notch may have a required shape, but is preferably formed as an inclined surface. On the other hand, one part of the inner ring is cut to form a C shape, a leaf spring is attached to the notch, and a recess into which a ball fits is provided on the outer peripheral surface of the inner ring, and between this recess and the leaf spring. Insert the ball. Also, attach the pin to the surface of the inner ring.

The shape of the depression may be a hole smaller than the diameter of the ball. A compression spring may be inserted in the recess instead of the plate so that the ball rolls up on the peripheral surface of the cut portion.

[0008]

[Action]

 To explain the operation, the roll paper tube fixing device according to the present invention inserts the roll paper tube into the core bar when attaching the roll to the core rod for the roll holder of the machine body. Next, insert the hole of the inner ring of the roll paper tube fixing tool into the core rod, and hang the pin attached to the surface on the notch groove at the end of the paper tube. Then, when the outer ring is rotated by hand while pressing the roll paper core fixing tool against the roll paper core, the ball inserted in the notch moves and runs up the inclined surface and is sandwiched between the outer peripheral surface of the inner ring and the leaf spring. As a result, the inner ring is deformed toward the center and tightens the core rod as a result of the force being applied toward the center of the inner ring. When the roll paper tube fixing device is fixed to the core rod, the roll is firmly fixed to the core rod together with the paper tube.

When the outer ring is rotated in the reverse direction when the roll is removed, the ball moves along the inclined surface of the cut portion, the force applied toward the center of the inner ring is reduced, and the deformation of the inner ring is restored. Then, since the hole diameter of the inner ring becomes larger than the outer shape of the core rod and loosens, the roll can be removed by pulling it out by hand.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to the exemplary drawings. As shown in FIGS. 1 and 3, the roll paper tube fixing device of the present invention has two resin sheets of the same thickness with holes 1 and 2 formed in the center. An outer ring 3 and an inner ring 4 each made of a disc made of metal are provided. One surface of the outer ring 3 has an annular stepped portion 5, and the hole 1 also has an annular stepped portion 6. Also, the outer peripheral edge of the other inner ring 4 also has stepped portions 7 and 8 on both sides, and the one stepped portion 7 is fitted to the stepped portion 6 provided in the hole 1 of the outer ring 3 with each other. To do. When the outer ring 3 and the inner ring 4 are fitted to each other, the stepped portion 5 provided on the surface of the outer ring 4 and the other stepped portion 8 of the inner ring 4 form an annular groove 9. The ring 10 is fitted here and fixed with screws or an adhesive so that the inner ring 4 does not come off. In the fitted state, the outer ring 3 and the inner ring 4 are configured to be slidable against each other and rotatable. The diameter of the hole 2 of the inner ring 4 is substantially the same as or larger than the diameter of the core rod 13 into which the paper tube 12 of the roll 11 is inserted. Since the inner diameter of the paper tube 12 of the roll 11 is generally standardized, the diameter of the hole 2 of the inner ring 4 also follows this standard. Further, a notch 16 having an inclined surface 15 extending in the circumferential direction is provided on a part of the inner peripheral surface 14 of the hole 1 of the outer ring 3. This inclined surface 15 may be a straight line, or may be a rounded shape having a center radius eccentric from the center of the hole 1. On the other hand, as shown in FIGS. 3 to 5, one portion of the inner ring 4 is cut to form a C-shape. Then, the leaf spring 17 is attached over the entire inclined surface 15 of the cut portion 16 so as to be slightly floated from the inclined surface 15. It is preferable that both ends of the leaf spring 17 are bent so that they do not come off from the cut portion 16 and are hooked in the grooves 18 provided at both ends of the inclined surface 15. Further, the pin 19 is attached to one surface of the inner ring 4. The diameter and length of the pin 19 correspond to the width and depth of the cutout groove 20 provided at the end of the paper tube 12. Furthermore, a recess 23 into which a metal ball 22 is fitted is provided on the outer peripheral surface 21 of the inner ring 4. The depth of the recess 23 is set such that a part of the ball 22 fits in, and the ball 22 is inserted between the recess 23 and the leaf spring 17. As shown by the chain double-dashed line in FIG. 1, the ball 22 is normally located at the deepest part of the cut portion 16, and is inserted into the core rod 13 and the pin 19 into the cutout groove 20 of the paper tube 12. Then, when the outer ring 3 is rotated, a part of the side surface of the ball 22 is restricted by the recess 23 of the inner ring 4, and the other side slides up on the leaf spring 17 and runs up the inclined surface 15. Then, the depth of the cut groove 20 becomes gradually shallower, so that the ball 22 is pushed toward the central portion of the hole 2 and accordingly, the diameter of the hole 2 of the inner ring 4 is deformed in the direction of decreasing. Then, the inner ring 4 is configured to tighten the core rod 13.

[0011]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

First, it is a simple structure that is composed of two discs fitted together.

Further, the outer ring can be fixed by a simple operation of simply rotating it by hand. Furthermore, once fixed, the inner ring pressed by the leaf spring must be securely fixed to the core rod by the repulsive force of the spring and the reaction force of the inner ring deformed by the spring trying to restore the deformation. You can

Moreover, the spring pressure does not cause slack during use. Since it is configured to move with the rotation of the ball, operations such as tightening and loosening can be performed smoothly.

Since the paper tube is hung on the pin of the inner ring and fixed to the core rod integrally with the fixed roll paper tube fixing tool, it is securely fixed to the core rod without loosening.

[0016]

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a front view of an inner ring.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

5 is a view taken along the line CC of FIG.

FIG. 6 is a perspective view showing a conventional example.

[Explanation of symbols]

 1 hole 2 hole 3 outer ring 4 inner ring 14 inner peripheral surface 16 notch 17 leaf spring 19 pin 21 outer peripheral surface 22 ball 23 recess

Claims (1)

[Scope of utility model registration request] 1. An outer ring (3) and an inner ring (4) each of which is formed of two discs each having a hole (1) and a hole (2) formed in the center thereof and which are fitted to each other in a slidable state. The inner circumferential surface 14 of the inner ring 4 is provided with a notch 16, while the inner ring 4
Cut one part to form a C-shape, and cut out 1 above.
6, a leaf spring 17 is attached, a recess 23 into which a ball 22 fits is provided on the outer peripheral surface 21 of the inner ring 4, the ball 22 is inserted between this recess 23 and the leaf spring 17, and a pin 19 is attached to the surface of the inner ring 4. A roll paper tube fixing device characterized by being attached.