JPS6348588Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for supporting a roll of recording paper in a facsimile machine.

2. Description of the Related Art As a means for supporting a roll of recording paper in a facsimile machine, there is a method in which a shaft is inserted into a center hole of the roll of recording paper (hereinafter referred to as "roll paper") to fix the shaft, and a method that fixes the shaft is used. Some machines simply store roll paper in an open box. In either case, in order to prevent the roll paper from shifting in the central axis direction, both ends of the roll paper are held between plate-shaped objects, and one of the plate-shaped objects is pressed and biased by a spring. Some things are familiar.

Problems to be Solved by the Invention The former method using a shaft is effective in preventing rattling of the roll paper, but has the disadvantage that it takes time and effort to attach and remove the roll paper. On the contrary, the latter type, which is stored in a box, makes it easy to load and remove the roll paper, but it does not effectively prevent the roll paper from wobbling, resulting in the recording paper being fed out in a skewed manner. There is. The present invention has been developed in view of these circumstances, and its purpose is to prevent the roll paper from wobbling in a roll paper support device of the type that stores the roll paper in a box.

Means for Solving the Problems The present invention stores roll paper in a box, holds both ends of it between plate-like objects, and presses one of the plate-like objects with a spring to adjust the position of the roll paper in the central axis direction. This is a fixed device in which the mounting position of the spring is provided on a line connecting the central axis position of a full roll paper and the central axis position of an empty roll paper.

Effect When supporting roll paper by pressing it in the direction of the central axis, pressing the central axis position is effective in stabilizing the roll paper, and pressing at other positions will cause the pressing force to act in the direction of moving the roll paper. As a result, the roll paper position becomes unstable. The center axis position of the roll paper changes over time as the recording paper is fed out and the roll paper diameter decreases, but by setting the spring position on the change trajectory of the roll paper center axis during this process, The position at which the pressing force is applied can always be close to the center axis of the roll paper, and wobbling can be effectively prevented.

Embodiment FIGS. 3 and 4 show a recording section of a facsimile machine. R is a roll paper, which is placed and stored in a roll paper storage box 1 with an open top surface.
The box 1 has a front wall 1a, a rear wall 1b, and a left side wall 1.
c, a right side wall 1d, and a bottom wall 1e, the bottom wall 1e being inclined toward the front wall 1a. The box 1 is fixed to a frame 4 with screws 3 at bent portions 2, 2 of both side walls 1c, 1d. A platen roller 5 is rotatably installed on the frame 4 parallel to the front wall 1a, and a bent portion 6 extending from the front wall 1a engages with a bearing portion of the platen roller 5. A cutter 7 cuts the recording paper r fed out from the roll paper R, and is composed of a fixed blade 7a fixed to the frame 4 and a rotationally driven rotary blade 7a. 8 is a print head that is pressed against the platen roller 5. Reference numerals 11 to 15 are guide plates, and the recording paper r is drawn out through the spaces between the guide plates as shown by the dashed line. During reception, the platen roller 5
In the figure, it rotates in a clockwise direction, thereby feeding out the recording paper r little by little from the roll paper R. At the same time, the printing head 8 is driven to record image information on the recording paper r, and after recording is completed, the rotary blade 7b rotates to cut the recording paper.

In FIGS. 1 to 4, reference numeral 16 denotes a roll paper pressing member installed in the box 1. As shown in FIGS. The pressing member 16 consists of two resin pressing plates 17 and 18, and a part of the second pressing plate 18 has the first pressing plate 1.
A protruding portion 21 is formed to protrude and be inserted into a hole 19 formed in 7. The hole 1 is provided at the top of the convex portion 21.
A washer 22 having a diameter larger than 9 is fixed with a screw 23 to maintain both press plates 17 and 18 together. Further, a spring 24 is provided between the two pressing plates 17 and 18 on the outer periphery of a circular stepped portion 25 of the first pressing plate formed around the hole 19. Furthermore, the bottom edge 26 of the first pressing plate 17 is connected to the bottom wall 1 of the box 1.
It has an inclination angle that matches e, and a hook portion 27 and a protrusion 28 are formed on the front edge, and a protrusion 29 is formed on the rear edge. The roll paper R is stored in the box 1 between the right side wall 1d and the roll paper pressing plate 16. The front wall 1a and the rear wall 1b of the box 1 have elongated holes 3 at positions corresponding to the length in the center axis direction of the A3 and B4 roll paper from the right side wall 1d, respectively.
1a, 31b and long grooves 32a, 32b are formed, and the roll paper pressing member 16 has a hook portion 27.
into the long holes 31a and 31b, and the protrusion 29 into the long groove 32.
It is detachably supported by being inserted through the holes a and 32b, respectively. Roll paper R is spring 24
The hook portion 27 and the protrusion portion 29 are pressed between the right side wall 1d and the second pressing plate 18 in the direction of their central axis, and the hook portion 27 and the protrusion portion 29 are inserted into one long hole 31a and the second pressing plate 18 when the roll paper R is A3 size. In the long groove 32a, B4
size, the other long hole 31b and long groove 3
2b.

In FIG. 1, since the bottom wall 1e of the box 1 of the roll paper R is inclined, the peripheral surface of the roll paper always maintains a position in contact with the front wall 1a and the bottom wall 1e. Therefore, the roll paper R is at the position indicated by R1 when it is full, that is, the maximum diameter, and is at the position indicated by R2 when it is the minimum diameter, that is, empty. , the locus drawn by its central axis is shown by line segment A. Note that 33 indicates the core tube of the roll paper R, and P1 and P2 indicate the virtual center axis positions of the full roll paper R1 and the empty roll paper R2, respectively. The center position P3 of the spring 24 of the roll paper pressing member 16 is the above-mentioned both center axis positions P
1 and P2, that is, approximately the midpoint of the line segment A. Further, the center position P3 is located within the core tube 33 of the fully rolled paper P1 and also within the core tube 33 of the empty rolled paper P2. Therefore, in the process where the roll paper P moves from a full state to an empty state as the recording paper r is gradually fed out, the roll paper pressing member 1
6 causes the pressing force of the spring 24 to always act on the center axis of the roll paper or its vicinity, effectively preventing wobbling or vibration of the roll paper R when the recording paper r is fed out. If the pressing force of the spring 24 acts on a portion far from the central axis of the roll paper in the process of shifting the central axis position of the roll paper described above, this pressing force works together with the force acting as the recording paper r is fed out, causing the roll paper to roll. This may cause undesirable positional fluctuation or wobbling in the paper R, and this wobble may cause the fed recording paper r to skew, resulting in a recording error.

Effects of the invention According to the invention, the roll paper is simply stored in the box, and there is no need to insert a shaft or the like into the center hole of the roll paper, so it is extremely easy to attach and detach. Further, regardless of the diameter of the roll paper, the vicinity of the central axis position is always pressed by the spring, so wobbling etc. can be effectively prevented, and recording errors due to skewed feeding of the recording paper can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a roll paper pressing member and its function, FIG. 2 is a sectional view of the pressing member, and FIGS. 3 and 4 are a side view and a plan view showing the recording section of the facsimile apparatus. 1... Roll paper storage box, 16... Roll paper pressing member, 24... Spring, A... Line segment,
P1... Center axis position of full roll paper, P2... Center axis position of empty roll paper, R, R1, R2... Roll paper, r... Recording paper.

Claims (1)

[Scope of utility model registration request] It consists of a box that stores the recording paper wound into a roll, and a roll paper pressing member that presses the recording paper in the direction of the central axis using a spring within the box. 1. A support device for a roll of recording paper in a facsimile machine, characterized in that the device is positioned on a line connecting the central axis position of an empty recording paper.