JPS6246844A - Recording paper sheet holding device - Google Patents

Abstract

PURPOSE:To ensure the holding of a recording paper sheet, by providing a plurality of resilient bent parts on both side of a pawl section, by providing retainer guides on both side surfaces of the pawl section, and further by enabling the free end side of the pawl section to slide on an opposed inclined surface. CONSTITUTION:A pawl section has resilient bent parts 11B, 11C, 11D, 11E, the one end of the bent section (11B side) being secured as shown in the drawing, and has retainer guides 12 for a recording paper sheet provided on both side surfaces of a plate-like part 13. When a recording paper sheet 2 is set, the stationary side upper end 11A of each guide 12 is exerted with a push-in force in the direction X in dependence upon the inner diameter part 4 of the core of the paper sheet. When the bent section 11E is displaced in the direction X and therefore to abut against a cylindrical part 16, the bent section 11B acts upon the bent section 11E which is therefore displaced in the direction Y, and therefore, the plate-like part 13 of each guide 12 becomes parallel with the inner diameter section 4 of the recording paper sheet 2. Accordingly, no excessive force is exerted to only of the bent parts during the paper sheet being removed and mounted, and therefore, the recording paper sheet may be surely held.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a roll-shaped recording paper holding device used in an image output device or a printing device.

2. Description of the Related Art Conventionally, the following means have been used as a holding device for a roll of recording paper.

FIG. 4 shows a conventional recording paper roll holding device. The spool portion 1 is a disk portion 3 larger than the outer diameter of the roll recording paper 2.
The recording paper 20 consists of a cylindrical part 6 which is slightly smaller than the inner diameter of the paper core 4 and has a support part 6 attached at a place where the outer diameter is cut out. The support part 5 consists of a plurality of claw parts provided at equal intervals.

7 is one of the plurality of claw parts.

FIG. 6 is a perspective view of the claw portion. As shown in FIG. 6, the claw portion 7 has an elastic bent portion fixed thereto, and the recording paper pressing guide 8 is located on one side of the plate-shaped portion 9. By inserting the spool 1 at both sides of the inner diameter of the paper core 4 and fixing the paper core 4 by the spring properties of the support section 5, the recording paper 2 is held when it is set in the recording device. was being carried out.

Problems to be Solved by the Invention However, with this recording paper holding device, the following inconveniences occur, which will be explained with reference to FIGS. 5 and 6.

FIG. 6 is a sectional view of the claw portion 7 of the conventional example.

In FIGS. 5 and 6, 7 indicates the end of the recording paper holding guide on the fixed part side, 7B indicates the elastic bent part, 7G indicates the upper end of the recording paper holding guide 8 on the non-fixed side, and 9 is a plate-shaped portion of the claw portion 7.

When setting the recording paper 2, the inner diameter of the paper core 4 is smaller than that of the end 7 on the fixed part side of the recording paper holding guide section of the claw 7, so the 7 ends are pressed down. The bent part 7B is
displacement in the direction. Along with this, the upper end portion 7C is also displaced in the X direction. One end of the claw part is fixed, and the other end is not fixed. Although the bending part molecule B is elastic, since it is fixed, the upper end part 7C is displaced more than the bending part 7B.

Therefore, the claw part 7 and the paper core 4 are in point contact at the seven ends,
The holding force against the recording paper 2 is weakened.

Furthermore, since the recording paper holding guide 8 is provided on one side, the recording paper holding force differs depending on the rotation direction of the recording paper 2.

When the recording paper 2 rotates in the direction of arrow F as shown in FIG. 6, is the direction of rotation the outer diameter of the claw part? Since the change is in the direction of decreasing the recording paper holding force, the recording paper holding force decreases. Moreover, since the claw part is fixed only on one side, the displacement π of the tip and the end differ in the long side direction of the plate-shaped part 9, and a larger force is applied to the fixed bending part B. Then, when the recording paper 2 is attached or detached, an unreasonable force is likely to be applied to the bent portion 7B, which deforms the bent portion 7B and loses its elasticity, reducing the recording paper holding force. In such a case, the recording paper 2 and spool 1 may idle and the inner diameter of the paper core 4 may be scraped by the recording paper holding guide 8.
Since the spool 1 comes off during operation within the recording apparatus and the position of the recording paper 2 becomes unstable, the supply of the recording paper 2 becomes unstable.

The present invention solves the above-mentioned conventional problems, and provides a recording paper holding device in which the holding force does not vary with respect to the rotational direction of the recording paper, and the claws can effectively contact the inner diameter part of the paper core. The purpose is to

Means to Solve the Problems The present invention provides a plurality of bending portions having spring properties on both sides of the claw, and also provides recording paper holding guides on both sides of the claw, and the tip of the non-fixed side of the claw. The above-mentioned object is achieved by making the section slidable on the opposing slope in order to move parallel to the inner diameter of the recording paper.

Effects The effects of the above technical means are as follows. The tip of the unfixed side of the claw comes into contact with the cylindrical part when the recording paper is attached, and the recording paper holding guides on both sides become parallel to the inner diameter of the recording paper.

Therefore, the recording paper holding guides on both sides come into uniform contact with the inner core of the recording paper.

Embodiment FIG. 1 is an outline configuration diagram of a recording paper holding device according to an embodiment of the present invention, FIG. 2 is an outline perspective view of one claw portion of the embodiment, and FIG. 3 is a sectional view of FIG. 2. It is.

Parts common to the conventional example are given the same numbers.

The spool 1 is inserted on both sides of the recording paper 2, and supports the weight of the recording paper 2 and positions it within the recording apparatus. The spool 1 includes a disk portion 3 that is larger than the outer diameter of the rolled recording paper 2, and a cylindrical portion 6 that is slightly smaller than the inner diameter of the paper core 4 of the recording paper 2 and has a support portion 10 attached to a hollowed out portion of the outer diameter.
Consisting of 11 is one of the plurality of claw parts.

FIG. 2 is a perspective view of the claw portion 11. The claw portion 11 is the third
As shown in the figure, one end of the elastic bent portion is fixed, and the recording paper presser guides 12 are located on both sides of the plate-shaped portion 130.

Next, the entire operation will be explained using FIG.

The 11th person is the upper end 11B of the recording paper holding guide 12 on the fixed part side.
, 11C911D, and 11E are elastic bending portions of the claw portion 11. When setting the recording paper 2, a force is applied by the inner diameter 4 of the paper core in the direction of pushing the upper end 11 of the fixed side of the recording paper holding guide 11 in the -6x direction. The force is the bending part 1
1B, 11G.

11D, but since the bent portions 11C and 11D are unsupported spring portions, the force is released and is ultimately transmitted to the bent portion 11B. The bent portion 11B is displaced in the X direction, and at the same time the bent portion 11 is also displaced in the X direction. When the bent portion 11K hits the cylindrical portion 6 and stops, the bent portion 11B cannot be displaced any further in the X direction. The force that has nowhere to go in the X direction is at the bent portions 11C and B.
Absorbed by 11D. At this time, since the bent portion 11B is supported, the absorbed force becomes a force that displaces in the Y direction, causing the bent portion 11E'i to be displaced in the Y direction. Therefore, the bent portion 11E supports forces in both the X and Y directions, and the recording paper guide 12 and the plate-shaped portion 13 become parallel to the inner diameter 4 of the recording paper 2.

Therefore, the displacement in the X direction is uniform throughout the claw portion 11,
The inner diameter portion of the paper core 4 can be effectively contacted. Also the 6th
As shown in the figure, since the recording paper holding guides 12 are located on both sides of the claw portion 11, there is no difference in the recording paper holding force depending on the direction of rotation. In addition, the elastic bent portion is 11K at the tip of the claw portion 11.
Therefore, when attaching and detaching the recording paper, it is difficult to apply excessive force to only one bent portion, so that the recording paper holding force does not decrease.

Effects of the Invention According to the present invention, the claws on both sides of the claw portion are displaced to uniformly contact the inner diameter portion of the paper core and generate elasticity, so that the spool portion and the recording paper are fixed without any difference in the rotational direction. have an effect.

FIG. 3 is a cross-sectional view of the single claw; FIG. 4 is a cross-sectional view showing the configuration of a conventional recording paper holding device; and FIG.
The figure is a general perspective view of one of the claws, and FIG. 6 is a sectional view thereof.

119.19. Spool, 2...M'd recording paper,
3...Spool disc part, 4...Recording paper core, 5, 1o...Support part, 6...
Cylindrical part of spool, 7.11... River/claw part, 8,12...
... Recording paper holding guide, 9, 13 ... Plate-shaped part of the claw part.

Name of agent: Patent attorney Toshio Nakao and 1 other person m1
Figure 3 Figure 4 Figure 6

Claims (1)

[Claims] A main body part having a slope on a part of the outer periphery, a guide part fixed to the main body part and protruding from the outer periphery, and a contact part slidable in contact with the slope, and a recording paper is attached. A recording paper holding device comprising a plurality of claws that are elastic in the recording paper axial direction.