JPS5959483A - Paper roll holder for printer - Google Patents

Abstract

PURPOSE:To prevent a roll paper from slackening during the operation by mounting a separator rotatably on a frame and a lever having a holding section rotatably on the separator being energized with a tension spring. CONSTITUTION:A separator 15 is composed of a plurality of wires 16 arranged longitudinally welded with a plurality of wires 17 arranged laterally and both ends of the wire 17 at the final section are held rotatably at the rear of both inner walls 3 and 4 of a frame 1 and a holder roller 22 is mounted at the end of a holding lever. A lever 18 is energized downward with a tension spring 25 whereby the holding roller 22 is pressed against a paper 6 to prevent it from slackening.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] This invention relates to a paper roll holder in a printer.

[Technical background of the invention and its problems]

Conventionally, a roll of paper is attached to a frame located at the rear of the printer, the paper is pulled out into the printer, and the frame is equipped with a separator that supports and separates the pull-out side of the paper, which is folded back by the platen, from the supply side. A paper roll holder is provided with a lever that is rotatably attached to a separator and has a presser part that connects to the outer periphery of a roll of paper.

However, since the lever rotates υ due to its own weight, the action of pressing the paper by the presser part is halved and the paper becomes slack. Alternatively, even if the vapor end is detected by actuating a switch using a lever, switching the switch becomes uncertain due to its own weight. Also, when replenishing paper, the separator is tilted back to open the top of the frame, but at this time the lever swings under its own weight, which can interfere with the frame and cause damage, and the separator and lever made of wire can become deformed. The sex is great.

[Purpose of the invention]

This invention was made in view of these points, and can at least prevent the paper from loosening during use.
Another object of the present invention is to provide a paper roll holder for a printer that can prevent scratches and deformation caused by interference between a frame and a lever when rotating a separator.

[Summary of the invention]

In this invention, a separator is rotatably attached to a frame, and a lever having a presser portion is attached to the separator so as to be rotatably biased by a tension spring. The paper is held securely by the holding part to prevent the paper from loosening, and when replenishing paper, the separator is rotated backwards, but by tensioning a tension spring between the rear end of the lever and the separator. Prevents excessive deflection of the lever and therefore prevents the lever from interfering with the frame or surrounding parts,
The structure is such that the product value can be increased by preventing parts from being damaged or deformed.

[Embodiments of the invention]

An embodiment of this "emission" will be explained based on the drawings.

(1) is a frame that is detachably connected to the rear of the printer (2).The side wall (3) directly opposite this frame (1)
(4) K has notches (5), which are holding parts, formed from the top surface, and both ends of the paper shaft (7), which is inserted through the center of the rolled paper (6), are attached to these notches (5). ) is held. Further, both ends of a tension wire (9) that slidably holds the guide (8) according to the width of the paper are rotatably attached to the right side wall (3 bars 4). The arm OQ attached to both ends of this tension wire (9) is biased in one direction by a spring Qυ, and
A stopper (6) for regulating the rotation angle of the tension wire (9) is bent and formed on these arms (10) opposite the lower edges of the right side walls (3) (4). An opening α→ is formed in the side wall (3), and a switch 01 is attached to this opening 04.

Next, a separator αQ is provided. This separator 09 has a plurality of wires OQ arranged along the front and back direction.
and a plurality of wires arranged along the lateral direction are welded together, and both ends of the rearmost wire 07) are connected to the rear of the frame (1) directly opposite side a (3) (4'l). It is held so that it can move freely.A lever Osha is rotatably attached to one end of the wire αη in the middle part.

This lever (the protruding piece in the middle part facing the actuator 09 of the switches 0 and 0) is bent, and the presser roller Q→, which is the presser part, is attached to the roller shaft Qυ standing upright at the rear. It is being Therefore, a fixed part (C) is formed near the rotation center (C) on one side of the + pallet θ9, and tension is applied between this fixed part (C) and the roller shaft (2υ). A spring (C) is tensioned.As shown in Fig. 2, the presser roller (C) is pulled up against the paper shaft (C) by the tension spring (C).
7) A straight line passes through the center of rotation of the lever θ~ and the center of the presser roller (A) so as to elastically join the outer periphery of the lever θ~. Q
There is no fastening part on the top, and the straight line passing through the center of the presser roller and the fastening part slopes downward at an angle of θ with respect to the straight line.

In such a configuration, when replenishing the paper (6), the separator 09 is rotated backward to open the upper part of the frame (1) as shown in FIG.
Since a tension spring (C) is installed between the free end and the fixed part (C), even if the lever 0υ swings a little, it will not interfere with the frame (1) or cause the lever (1→ The end is notched (
5) will not obstruct the rotational movement of the separator (li.
1HI) will not bend.

The state in which all the paper (6) are set is as shown in Figure 3. The paper (6) is fed to the sprocket (c), passed between the platen (2'j) and the print head (a), and printed. The rear separator (passes through one upper fc and is guided backwards. The L/bar side is forced downward by a tension spring,
Therefore, the presser roller (c) presses the paper (6)'
x Press with the necessary force 1-2 to prevent the paper (6) from loosening 1.As printing progresses, by the time the paper (6) runs out as shown in Figure 2, the lever 0 will move down 1. The switch (141 actuator ()) is the switch (141 actuator (
Press 1 and press switch O◇ to release paper (6
), but the lever is a tension spring (c).
By the power of switch QI nora! Since one changeover is performed, 101 changeover operations are performed reliably 170 times.

[Effect of excuse]

As mentioned above, Akira installed a tension spring between the free rotation end of the lever and the separator to force the lever downward, so the paper was held down by the presser part attached to the rear end of the lever. Even when the end of the paper is detected by fully switching the switch with the lever, the operation of the switch can be ensured by fully shifting the lever.Furthermore, the separator This has the effect of suppressing excessive vibration of the lever during the rotation operation of the lever, preventing scratches and deformation caused by the lever interfering with the frame, etc.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is a vertical cross-sectional side view taken along line A-A in FIG. 1, and FIG.
Figure 3 is a longitudinal cross-sectional side view of the state where all the papers are set, Figure 4
The figure is a longitudinal side view showing the rotational movement of the separator. 1... Frame, 2... Printer, 5... Notch (
holding part), 6... paper, 15... separator,
18... Lever, 22... Pressing roller (pressing part),
23...Separator offshore 1st motion center, 24...Fixing portion, 25...Tension spring applicant Tokyo Electric Co., Ltd. d

Claims (1)

[Claims] Holding parts are provided on both sides of a frame located at the rear of the printer for winding and holding a long paper drawn out by the printer into a roll, and the rear part of the frame is provided with a holding part for winding and holding a long paper to be drawn out by the printer, and a holding part is provided at the rear of the frame for holding a long sheet of paper drawn out by the printer along the upper outer periphery of the rolled paper. A separator extending forward is attached so as to be rotatable rearward using its rear part as a fulcrum, and the front end of a lever is attached to the separator so as to be movable up and down, and the outer circumference of the paper in a rolled state is attached to the free rotation end of the lever. A holding part is provided to be joined to the separator, a holding part is formed near the center of rotation of the separator, and a tension spring is tensioned between the holding part and the rear part of the lever to hold the valve part in place. A paper roll holder for a printer, characterized in that the paper roll holder is biased toward the center of the roll diameter of the paper.