JPS59161175A - Roll paper holding device - Google Patents

Abstract

PURPOSE:To simplify the constitution of a roll paper holding device by constituting so that a containing box is removed from a housing only when a roll paper taken out to a paper path is rewound to the containing box, and giving a back tension to the roll paper by a part of this constitution. CONSTITUTION:A roll paper 20 is wound like a roll round a paper pipe 29, both ends of the paper pipe 29 are held by spools 30, 31, and tubular parts 30a, 31a are fitted to the spools 30, 31. Also, a roll paper supporting shaft is supported so as to be freely rotatable between a front side plate 32 and a rear side plate 33 of a roll paper containing box 26. A knob 36 is fixed to this spool 30, a positioning groove 36a is provided on the knob 36, and a positioning member 37 provided with a groove 37a is screwed to the spool 31. Also, a disk 41 is placed on the knob 36, and gears 43, 47 are coupled to the disk 41 by friction with a spring. Moreover, this device is constituted so that the containing box 26 is removed from a housing only when the roll paper 20 is rewound to the containing box 26 by utilizing the knob 36, the disk 41, the gear 47 and a stopper 57, etc., and the constitution of the device is simplified.

Description

[Detailed Description of the Invention] (Technical Field) The present invention provides a
The present invention relates to a holding device for so-called rolled paper wound into a roll.

(Prior Art) In devices that use roll paper, it is essential to replace the roll paper. In order to facilitate this operation, a roll paper holding device has been proposed in which the roll paper is stored in a storage box and the storage box is taken in and out of the device. However, at □, the roll paper is pulled out from the roll and cut with a cutter according to the selected length.

Namely.

When attempting to pull out the storage box from the apparatus, the portion of paper pulled out from the roll will be located in the paper path communicating with the storage box. If the storage box is forcibly pulled out in such a state, the paper that is forcibly pulled out will have an adverse effect on various parts.

Further, since the roll paper is unwound during the recording operation, it rotates more than necessary due to inertia.

In order to prevent this unnecessary rotation of the roll paper, back tension is applied to the roll paper, but the conventional 1% Q structure has a complicated and bulky device, and it is difficult to apply a constant tension. It was difficult.

(Object of the Invention) The present invention has been made to solve the above-mentioned conventional problems, and it eliminates the problems caused by the paper being pulled out into the paper path, and also applies back tension to the roll paper using a simple device. The purpose of the present invention is to provide a roll paper holding device that is flexible and flexible.

(Structure of the Invention) The present invention is configured such that the rolled paper cannot be pulled out of the apparatus unless the paper being pulled out into the paper path is rewound onto the roll, and a part of this configuration is used to Applying back tension to paper is a special enemy.

Hereinafter, the present invention will be explained in detail with reference to an illustrated embodiment.

Figure -i1 shows an example of a desktop type facsimile to which the present invention is applied, and inside the case l,
A scanner unit 2 is arranged at the top, and a plotter unit 3 is arranged at the bottom. A power source section 4 and a power transmission section 5 are arranged respectively. The scanner unit 2 is placed on a document table 6, and includes a separating roller 7, a separating plate 8,
The original separated into individual sheets is conveyed by valve feed rollers 9 and 10, and the image is read from the inside.
After the document is scattered, the document is sent to the tray 111. When the original passes over the target glass 12, the original image illuminated by the illumination lamp 13 is reflected by the mirror 14. The light is focused on the °C photoelectric conversion element 6 through the lens unit 15 and extracted as an electrical signal. The plotter unit 3 has a thermal head 17. Platen 18. It includes a cutter 19.

Recording paper 20 wound into a roll (hereinafter referred to as [roll paper]) is supported by a roll paper holding device 21 and is moved by a manual roller 22. The paper is sent through the paper path 23 to the plotter section, and the thermal head 17 captures the image information. recorded. At this time, the platen 18 presses the recording paper with the thermal head and conveys the recording paper. Platen 1
The recording paper conveyed by 8 is cut by a cutter 19 consisting of a fixed blade 19a and a movable blade t9b, and is then discharged onto a tray 25 by a pair of paper discharge rollers 24.

The roll paper holding device 21 includes a guide rail 27 provided between the roll paper storage box 26 and a stationary member (not shown).
28 so that it can be freely inserted into and taken out from the housing IK. The position where the roll paper storage box 26 is pushed into the housing 5-1 and is in a state where it can supply the distribution paper to the plotter section is called the cent position, and the storage box 26 is pulled out from this cent position. The position is called the pull-out position.

The roll paper 20 is placed in a paper tube 2 as shown in Fig.
It is rolled into 9 rolls. At both ends of the paper tube 29, spools 30, 31 serving as roll paper holding means are fitted with tubular portions 30a and 31a.

On the other hand, between the front side plate 32 and the rear side plate 33 of the roll paper storage box 26, roll paper support shafts 34 and 35 are rotatably supported, as shown in Figures f1 and 4.

On this shaft 34.35 is mounted a spool 30.31 which is fitted with a roll of paper. Thereby, the roll paper 20 is rotatably supported and stored in the storage box 26.

A knob 36 for manually rotating the roll paper is screwed and fixed to the spool 30. A positioning groove 36a is formed in the knob 36 in the circumferential direction. A positioning member 37 having a positioning groove 37a is screwed onto the spool 31. - The first positioning grooves 36a and 37a are the positioning notches 32a formed in the front plate 1 and the positioning notches formed in the rear plate 11, as shown in Figure 1, Figure 1, Figure 2, and Figure A'4. 33a, respectively.

Therefore, the roll paper 20-1 is positioned such that its movement in the width direction is restricted. In addition, the storage box 26
The knob 36 is used to attach and detach the roll paper 20 from the
Although it is more convenient to provide both the knob 36 and the positioning member 37, is it possible to use only the knob 36 for that purpose? It can be achieved.

The manual cut 22 is freely supported between the anterior sacral plate 32 and the posterior plate 33, and a knob 2 is attached to one end of the manual cut 22.
2a (see Figure 2) is fixed. This roller 2
A driven roller 38 is pressed against the roll paper 2, and the roll paper is unwound from the roll by the manually rotated roller 22. In Figures 73 and 4, a cutter 39 for manually cutting the recording paper is arranged to the left of the rollers 22 and 38.

On the front plate 32 of the roll paper storage @26, there are 2 figures to 6
As shown in the figure, a support shaft 40 is implanted.

A disk 41 is rotatably inserted through the shaft portion 41c of the support #U40, and a bracket 42 is rotatably inserted through the shaft end. A notch 41a and a protrusion 411) are formed on the periphery of the disk 41, respectively.

A gear 43 having an annular groove 43a is rotatably inserted into the tube shaft portion 410 of the disk. This gear 43
An extensible coil spring 44 is provided between the bracket 42 and the
is interposed, and this spring presses the gear 43 against the end surface of the disk 41.

A support shaft 45 is embedded in a part of the bracket 42 . This support shaft 45 has a roller 46 as an interlocking rotating body.
A gear 47 integrally formed with this roller is rotatably supported. The gear 47 meshes with the gear 43 described above. A stopper 48 is formed in a part of the bracket 42 and is bent into a U-shaped cross section. This stopper 48 extends to the vicinity of the periphery of the disk 41 and is located on the rotation locus of the protrusion 41b. The stopper 4H has a lI'll (49) embedded therein, and a torsion spring 50 is wound around it.

One end of this spring 50 is locked to a locking piece 4Sa of the stopper, and the other end is locked to a pin 51 embedded in the front plate 32. This torsion ring 50 gives the bracket 42 the ability to rotate in the direction of pushing the roller 46 against the circular surface of the knob 36 about the support shaft 40 . A rubber ring 52 (see Figure 2) is fitted into the portion K of the knob 36 that the roller 46 comes into contact with in order to increase the rotation transmission force of the knob.

A locking means 54 is disposed on the front plate 53 of the main part of the housing (see Figure 2 and Figure 4). The locking means 54 includes a bracket 55 fixed to the front plate 53, a stopper 57 pivotally connected to the bracket at @56, and a stopper 57 that smoothly attaches one end to the bracket 55, giving the stopper 57 a swinging habit. It is made up of a leaf spring 58 which has a flat spring 58, and a pin 59 which restricts the swinging of the stopper 57.

The stopper 57 is positioned so that it can be held on the bent portion 57ak and the disk 41 by the elasticity of the plate spring 580. In other words, as shown in Figures 1 and 2, Low 9
- When the paper storage box 26 is placed in the set position,
The above-mentioned stop flange 57 is located to the right of the disk 41. Although the details will be described later, if the notch 41a of the disk 41 does not face the stopper 57, even if the roll paper storage box 26 is pulled out in the direction shown by arrow a (see Figure 2), the stopper 57 and the disk 41 engage with each other to prevent this. Further, as shown in FIG. 4, when the notch 4La of the disc 41 corresponds to the stopper 57, the roll paper storage box 26 can be pulled out.

The operation of the apparatus of the present invention configured as described above will be explained.

For convenience of explanation, the operation for pulling out the roll paper storage box 26 from the housing will be explained first.

Roll paper storage box 26 When it is necessary to pull out hair, the pull-out end of the roll paper 20 is connected to the platen 18 and the thermal head 1.
7 (see Figure 1).

Further, at the time of , the disk 41 is located at the lock position where it abuts against one end 48b of the stopper 48, as shown in FIG. The disk 41 is opposed to its non-notched cyst flange 57. Therefore, when the roll paper storage box 26 is in the center position and the disk 41 is placed in the locked position, the storage box 26 can be pulled out. cannot be done.

Therefore, when the knob 36 is rotated clockwise, which is the direction shown in FIG. 3, the roller 46 is rotated counterclockwise in conjunction with this rotation. The rotation of the roller 46 is controlled by the gear 47.
The gear 43 is rotated through the gear. This rotation of the gaff 430 is transmitted to the frictionally coupled disc 41 by the elasticity of the spring 44, causing it to rotate clockwise. Then, as shown in FIG. They are facing each other.

This position of the disk 41 is called the unlocked position.

The amount of rotation of the knob 36 by 1rji when the disk 41 is displaced and rotated from the locked position to the unlocked position is set to be sufficient to completely rewind the paper that has been pulled out from the roll into the storage box 26. Ru. In other words, the knob 36
If you rotate the paper in the direction (clockwise in Figure 4), the length of the paper that is rewound will vary depending on the diameter of the roll, so even if the diameter of the roll is the smallest, When the disc 41 is rotated from the locked position to the unlocked position, the number of teeth of the gears 46 and 47 is set so that the paper drawer is rewound back into the storage box. In addition,
Even after the disc 41 is locked in the unlocked position, the knob 36 can still rotate while sliding between the disc 41 and the gear 47.

As shown in Figure 4, when the paper roll is rewound into the storage box and the disc 41 is placed in the unlocked position,
The storage box can be pulled out of the housing 1 by being guided by the guide rail 27°2s (see Figure i□x). This storage box 26 can be separated from the housing by removing it from the guide rail. Then, the user holds the knob 36 and the positioning member 37 and takes out the roll paper from the storage box 26. At this point, the roller 46 moves from the knob 36, and the bracket 42 swings counterclockwise around the spindle 40, but this swing causes one side 4i42a of the bracket to touch the bin 51.
It is regulated in accordance with the

Next, a new roll of paper is stored in the storage box 26. At this time, the spool 3 (1, 31 is placed on the shaft 34.35, the position Yf of the knob 36 is placed in the notch 32a, and the groove 37a of the positioning member 37 is placed in the notch 33a.
By respectively engaging the roll paper 20,
This means that the storage box 26 is rotatably positioned and supported in the width direction of the storage box 26.

When you put 20 tons of roll paper into the collection box 26, k, knob 36
The rollers 46 are in contact with the outer periphery of the torsion spring 500.
The elasticity makes both of them jade. After that, 7
As shown in the figure, the pulled-out end 201) of the roll paper is rotated by the manual roller 22 and held between the rollers 38, and then the manual cutter 39 cuts off unnecessary parts. When the roll paper is rotated, the knob 36 rotates, and the roller 46 is rotated clockwise.Then, the disc 41 follows this and moves to the non-locking position (Figure 4). 13 - As shown in the figure, the disc rotates counterclockwise and is placed in the locked position.The relative positions of the disc 41 and the stopper 57 at this time are shown in Figure 6. This is shown by a solid line. When the roll paper storage box 26 is pushed into the housing in the direction of the arrow with the disk 41 in the locked position, the periphery of the non-notched portion of the disk 41 touches the bent portion of the stopper 57. The disk 41, which is still pushed in, hits the slope portion 571) of the stopper 57a.
As shown by a chain line 57A in FIGS. 3177 and 3177, the plate spring 58 is swung around the axis 56 by resisting the elasticity of the plate spring 58 to move the disk 41 away from the locus of movement in the direction of movement of the storage box. When the disk 41A and the stopper 57A are disengaged, the stopper 57A returns to the solid line position 57 due to the elasticity of the leaf spring 58. Stopper 57 at this time
The relative positions of the roll paper storage box 26 (disc 41) and the roll paper storage box 26 (disk 41) are shown in FIG. That is, the roll paper storage box is placed in the locked position simply by pushing it in.

14- Later, when the printing operation starts, the roll paper 2
0, the knob 36 is rotated in the counterclockwise direction (in Fig. 7), which is the direction of K"a"r. 360 rotations of the knob means 46 rollers. Gear 47. Gear 43. It is transmitted to the disk 4I via the spring 44, causing the disk to rotate counterclockwise in Figure 7. This rotation of the disk 41 is caused by the projection 41b/1-stop flange 48 as shown in FIG.
It is regulated by being held at one end 48b of.

Even if the rotation of the disk 4J is restricted, the roll continues to rotate at a low speed of 200 revolutions, but this JR81 rotation does not reach the disk because the opposing end surfaces of the gear 43 and the disk 41 slide. In other words, roll paper 20 pieces (
Actually, knob 36. Coro 46. Gear 47. Gear 43° Spring 4
4, a frictional force is applied between the disc 41 and the stopped disc 41. The transport system for 7mm 7mm is generally designed to have an intermittent one-frame movement using a stevening motor. Therefore, the roll paper is also rotated and stopped repeatedly, and is transported intermittently.

When the roll paper 20 is intermittently conveyed, excessive rotation occurs due to inertia when it stops, but as described above, frictional force is generated between the roll paper 2° and the stopped disk 41. This acts as a resistance force and prevents the roll paper from rotating too much.

In other words, back tension is applied to the roll paper.

(Effects of the Invention) As described above, according to the roll paper holding device of the present invention, the storage box cannot be pulled out from the housing unless the portion pulled out into the housing is rewound into the roll paper storage box. , there will be no paper clogging in the paper path. Since this locking mechanism is used to apply back tension to the roll paper, excessive rotation of the roll paper can be prevented. This means that the lock function and the tension printing function can be easily combined.
This means that the roll paper holding cylinder can be manufactured with a small size and a simple structure.

[Brief explanation of the drawing]

Figure 1 is a schematic configuration diagram of a facsimile as an example of a device to which the present invention is applied, Figure 2 is a plan cross-sectional view showing an example of the present invention, and Figures 3 and 3 are the same locking position and pack tension application. Figures 1 and 4 are partially cutaway front views showing the unlocked position, Figures 5 and 5 are exploded perspective views showing the main parts of the present invention, and Figures 51' and 6 are views showing the action of the locking means. 11□ is a plan view of the main parts, and Figure 7 is a front view showing the state before the roll paper storage box is pushed into the housing. 1... Housing, 2o... Roll paper, 26... Roll paper storage box, 30.3+... Spool, 34.35...
・Roll paper support shaft, 36...knob, 41...disc, 43.47...gear, 46...roller, 48...
・Stotsuba, 57...Stotsuba, 58...Hane 1
7-

Claims (1)

[Claims] A roll paper holding means for holding both ends of a rolled paper; a roll paper storage means for storing the roll paper and rotatably supporting the roll paper via the upper roll paper holding means; and a casing. a guide means for guiding the roll paper storage means so as to be freely put in and taken out between a center position where the roll paper storage means is pushed into a predetermined position relative to the body and a drawer position where the roll paper storage means is pulled out and rescued from the set position; , an interlocking rotary body that rotates in conjunction with the rotation of the holding means, and a disk that is substantially frictionally coupled to the interlocking rotary body and rotates a predetermined number of times according to the rotation of the rotary body. and is given the habit of being located on the movement trajectory of the disk in the pull-out direction of the roll paper storage means, and when the storage means is placed at the set position, is positioned so as to be able to be held on the disk. a locking means provided in an immovable position to prevent the storage means from being pulled out; The disk is placed in a locking position where the portion other than the notch formed in the disk faces the locking means, and the roll paper holding means is in the direction of the teeth 2 opposite to the direction of the spear 1. When the disk rotates, the notch faces the locking means and the disk rotates in conjunction with the rotation, so that the notch faces the locking means and moves in the direction of pulling out the locking means.
1. A roll paper holding device characterized by comprising a regulating means for regulating one angle of rotation of the disc so as to position the disc in an unlocked position where the disc is not obstructed.