JPH03147656A - Image forming device - Google Patents

Abstract

PURPOSE:To apply a tension on a photosensitive paper by applying friction to the revolution of the winding shaft of a cartridge by arranging a frictional resistor member between a sleeve and an end plate which is installed so as to revolve integrally with a rotary shaft. CONSTITUTION:In copying operation, a microcapsule paper 11 is pulled out at a constant speed and taken up on a taking-up shaft. At this time, a cover member is closed, and the taking up shaft 12 is in engaged state with a rotary shaft 27, and as the microcapsule paper 11 is pulled out, the taking-up shaft 12 revolves, together with the rotary shaft 27. Since, in this case, an edge plate 29 which revolves integrally with the rotary shaft 27 is pressed on a felt 30 by a springs 31, friction is applied to the revolution of the rotary shaft 27 and the revolution of the taking-up shaft 12, and the microcapsule 11 is applied with tension.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is directed to storing a cartridge in which a photosensitive paper wound around a winding shaft is housed in a case in a cartridge storage section, and The present invention relates to an image forming apparatus in which paper is moved back and forth by a winding shaft.

(Prior Art) Image forming apparatuses, such as photosensitive and pressure sensitive copying machines that are capable of full-color copying, have a configuration in which a photosensitive paper cartridge is housed in a cartridge accommodating portion of the main body of the copying machine. This cartridge has a structure in which a roll of photosensitive paper is wound around a winding shaft, and the roll is housed in a case. The above-mentioned photosensitive paper is passed through an exposure section, a pressure section, and a separation section in order and then passed around the winding shaft.The photosensitive paper is exposed at the exposure section, and the photosensitive paper is exposed at the pressure section. After forming an image on the photosensitive paper on the image forming paper by stacking the paper and the image forming paper in the form of a sheet, the image forming paper is separated from the photosensitive paper in a separating section. , the used portion of the photosensitive paper is wound up on a winding shaft.

In this case, both images without distortion? 1, apply tension to the photosensitive paper when winding it up. I'm trying to make it easier.

Now, the ++Vj configuration and the tension (-1) configuration of this cartridge and the cartridge accommodating portion are shown in FIG. The cartridge 62 is stored in the ejector.
From both sides of case 63 of Volume 2 to both ends 64 of Kawasuke 64 of Volume 1
A and 64b are protruding.

A felt 6 is placed on the P1 side surface 61a of the cartridge storage portion 61 at a position where it contacts the end 64a of the winding 11 64.
5 is second-hand, and the inside surface 61b of j has an M shaft 64.
A leaf spring 66 is provided for applying pressure to the felt 65. Therefore, when the photosensitive paper (not shown) drawn out from the case 62 is moved back and forth by the winding shaft, the felt 65 acts as a frictional resistor against the winding shaft 64.
Chittekomi Kosou (1) gets excited. It should be noted that the cartridge storage section 61 is opened and closed by a lid 67.

In this type of apparatus, the portion of the photosensitive paper between the trailing edge of the exposed area and the leading edge of the next exposed area is not used for image formation and is fed as it is. Since the photosensitive paper was wound onto a take-up shaft, there was a problem in that the efficiency of using the photosensitive paper was delayed.

Therefore, in order to deal with this, in both image forming operations, after separating the image forming paper from the photosensitive paper, the unused portion of the photosensitive paper that has passed through the exposure section is rewound to the cartridge 62 side. It is possible to reduce unused portions that do not contribute to image formation as much as possible.

(Problems to be Solved by the Invention) Incidentally, in order to rewind the photosensitive paper, it is necessary to provide a structure that allows the winding shaft 64 to be rotated in the opposite direction.

However, in this case, there are felts 65 and leaf springs 66 at both ends of the winding shaft 64 for applying friction to the fi1 rotation of the winding shaft 64 (I:, so that while maintaining this friction application, It is difficult to realize a shaft drive configuration that drives the Zaidosuke 64 in one rotation, and in order to achieve this, it is necessary to review the S configuration of the friction 11 and develop a reverse mechanism!+L Fish is required. Moreover, since the cartridge 62 is replaced when it is ready for use, it is necessary to take care not to impair its replaceability (removability).

The present invention has been made in view of the above circumstances, and its object is to provide a method for rewinding the photosensitive paper while imparting friction to the rotation of the winding shaft of the cartridge without impairing the replaceability of the photosensitive paper cartridge. An object of the present invention is to provide an image forming apparatus that can perform satisfactorily.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a winding shaft with an S l! ! J. A cartridge comprising photosensitive paper housed in a case is stored in a cartridge storage part, and this photosensitive paper is taken up by a winding shaft. a sleeve fixed to face each other; a rotary shaft rotatably disposed within the sleeve and capable of engaging and disengaging from the winding shaft; and a case of the cartridge provided in the cartridge storage section. a rewinding mechanism that rotationally drives the rotating shaft in a direction to rewind the photosensitive paper;
an end plate sunk into the rotating shaft so as to rotate together with the rotating shaft; a frictional resistance member disposed between the endplate and the sleeve; and a frictional resistance member that presses the endplate against the frictional resistance member. It is characterized in that it consists of a biasing member that applies pressure.

(Function) Since the h1 rotating shaft (which is engaged with the winding shaft) is rotationally driven in the direction of rewinding the photosensitive paper by the back-up mechanism,
By engaging this rotating shaft with the winding shaft, the photosensitive paper can be rewound. Further, since the frictional resistance member is pressed by the biasing member against the end plate that rotates integrally with the rotating shaft, friction can be applied to the rotation of the rotating shaft and thus the winding shaft. Moreover, since this rotating shaft can be engaged with and disengaged from the winding shaft, cartridges can be replaced without any problem.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings as applied to a photosensitive pressure-sensitive copying machine capable of full-color copying.

As shown in FIG. 6, a movable original platen glass 2 and a movable original platen cover 3 are provided on the top surface of the main body 1 of the copying machine, and a desired original 4 is placed face down on the original platen glass 2. It is set in the same state.

A light source such as a halogen lamp 5 is disposed at the upper part of the main body 1, and this emits light in a line toward the document table glass 2. The light emitted from the halogen lamp 5 passes through the transparent document platen glass 2 and is reflected by the document 4 placed thereon.

Therefore, exposure scanning of the original 4 is performed by moving the original platen glass 2. The light reflected from the IGi draft 4 passes through a filter 6 for adjusting the Buddhist style of both copies and enters a projection lens 7, and the light projected by this lens 7 is reflected by a pair of reflection mirrors 8.9. turned around,
An image is formed on a microcapsule paper 11 located along an exposure table 10. The reflecting mirror 8.9 is mounted on a mirror mounting plate, and the optical path length and focus are adjusted by finely adjusting the mirror mounting position.

On the other hand, the microcapsule paper 11 is housed in a case 13 in a state where it is wrapped around a winding shaft 12, and such a cartridge 14 is taken out into a cartridge storage section 15 provided at the top of the main body 1. It is stored in Noh.

This cartridge storage section 15 is opened and closed by a lid member 16. and microcapsule paper 1
1 reaches the winding shaft 19 via a large number of rollers 17a, 17b, 17c, a pressure phenomenon device 18, and a separation mechanism 17d. This winding shaft 19 is rotationally driven by a motor (not shown) during a copying operation, so that the microcapsule paper 1
1 can be wound up. That is, the microcapsule paper 11 coming out from the lower part of the cartridge 14 is guided by the feeding roller 17a1 and the guide roller 17b to the exposure table 1.
After passing under 0, the microcapsule paper 11 is supplied to the pressure developing device 18, and the microcapsule paper 11 that has passed through the pressure developing device 18 is guided to the feed roller 17c1 separation mechanism 17d and meandering adjustment roller 17e, and then wound up. ? It is wound up on l1119. Note that the unexposed microcapsule paper after leaving the cartridge/14 is maintained in an unexposed state by the light shielding cover. Furthermore, the conveyance speed of the microcapsule paper 11 is controlled to be constant and is made to match the moving speed of the document platen glass 2, so that the microcapsule paper 11 has a predetermined amount of the document when passing through the exposure table 10. Lines of latent images are sequentially formed.

A suction cup type feeder ♀1 (device 20
is built in, and this is for taking out the color developing papers 22 stacked in the paper feed cassette 21, which serves as a paper storage section, one by one. The developer paper 22 taken out is conveyed by a feed roller 2'3a and a pinch roller 23b.
Developing paper roller 23c.

2'3d and the resist gate 23e, the leading end is aligned, and then conveyed to the j-power developing device]8.

Thus, the microcapsule paper 1 is placed in the pressure developing device]8.
A state in which the microcapsule surface of the microcapsule paper 11 on which the latent image is formed and the developer-coated surface of the color developer paper 22 are in contact with each other on the inside. The roller 18b is then sandwiched between the small diameter roller 18a and the backup roller 18b, and pressure is applied thereto. This pressure destroys the unexposed microcapsules and forms an image on the developing paper 22.

After the microcapsule paper 11 and the color developer paper 22 that have come out of the pressure development device 18 are separated by the separation mechanism 17d, the color development of the color developer paper 22 is promoted by the heat roller 24B of the heat fixing device 24, and an image is formed. After that, the paper is discharged onto the paper discharge tray 25 by the paper discharge roller. The separated microcapsule paper 11 is rewound by a mechanism described later in order to return the unexposed portion that has passed through the exposure table 10 to the cartridge 14 side rather than the exposure table 10.

Now, in FIGS. 1 and 2, both ends of the winding shaft 12 of the cartridge 14 housed in the cartridge storage section 15 are exposed to the outside from the case 13, and each end is exposed as shown in FIG. 7-shaped '/R12a as shown in
is formed. A sleeve 26 is attached to one side wall portion 15a of the cartridge storage portion 15 so as to face the winding shaft 12 in the axial direction. This sleeve 2
A II+1 rotation shaft 27 is disposed on the 6th ridge so that it can move in the axial direction (in the direction of arrows A and B), and at one end there is a 7
A letter-shaped protrusion 28 is formed, and as the protrusion 28 moves in the direction of the arrow AJj, the protrusion 28 moves to the position of S li + l 12 ? 'M 12
a, and is disengaged by moving in the direction of arrow B.

The rotary shaft 27 is provided with an end plate 29 so as to be movable in the axial direction and rotate integrally with the rotary shaft 27, and between the end plate 29 and the end 26a of the sleeve 26. A felt 30 is arranged as a four-strain resistance member. Further, around this rotating shaft 27, an compressed coil spring 31 is provided as a biasing member, and this spring '3
Reference numeral 1 applies a spring force between one end of the single-rolling shaft 27 and the end plate 29, thereby pressing the end plate 29 against the felt 30. A stopper 32 is fixed to the other end of the winding shaft 12 in the cartridge storage section 15 to prevent the winding shaft 12 from moving in the direction of arrow A. Therefore, the rotation shaft 27 is ,
It is normally engaged with the winding shaft 12 by the spring 31.

The other end of the rotating shaft 27 is connected to the end 26 of the sleeve 26.
a and protrudes to the outside, and a gear 34 constituting a part of the rewinding mechanism 33 is attached to the protruding portion of the rotary shaft 27.
It is fitted so that it can move i+J in the axial direction relative to the rotary shaft 27 and can rotate integrally with the rotating shaft 27. This gear 34 is rotationally driven by a motor 11 (not shown).

The rotating shaft 27 is moved in the axial direction by a linkage mechanism 35, and the linkage mechanism 35 will be described with reference to FIGS. 1 to 4. A cam plate 36 is provided on one side wall portion 15a of the cartridge storage portion 15, and this cam plate 36 is formed on the guide bin 37 fixed to the one side wall portion 15a of the cartridge storage portion 15 and the cam plate 36. The arrow C, It is provided so as to be movable in the DJ direction. The three bottles of the cam plate 36 are connected to a bottle 40 attached to the hinge plate 16a of the lid member 16 via a lever 41, so that the lid member 16 can be rotated in the direction of arrow E. When the cam plate 36 is opened, the cam plate 36 is moved in the direction of arrow C.
Conversely, when the cover +416 is rotated in the direction of the arrow F and closed, the cam plate 36 is moved in the direction of the arrow. A cam portion 42 with a diagonal step is formed on the edge of the cam plate 36 on the elongated hole 38 side.

An opening/closing lever 43 is attached to one side wall 15a of the cartridge storage portion 15 through a hole (not shown).
A roller 45 provided at one end of this opening/closing lever 43 comes into sliding contact with the cam portion 42, and a contact portion 46 formed at the other end
is adapted to abut against a contact plate 47 provided at the other end of the rotating shaft 27. Therefore, the opening/closing lever 43 is rotated in the directions of arrows G and H by the movement of the cam plate 36 in the directions of arrows C and D, respectively.

In the linking mechanism 35 having such a configuration, when the lid member 16 is closed, the cam plate 36. Opening/closing lever 43
The rotating shaft 27 is moved in the direction of arrow A through the winding shaft 12.
When the lid member 16 is engaged with the rotary shaft 27 and the lid member 16 is opened, the rotating shaft 27
is moved in the direction of arrow B and separated from the winding shaft 12.

Now, in the above configuration, when a copying operation is performed, the microcapsule paper 11 is pulled out at a constant speed and wound up by the winding shaft 19, as described above. At this time, the lid member 16 is closed, the winding shaft 12 is in engagement with the rotating shaft 27, and therefore the microcapsule paper 1
1 is pulled out, the winding shaft 12 rotates to the rotation shaft 27.
rotates with In this case, since the end plate 29 that rotates integrally with the rotating shaft 27 is pressed against the felt 30 by the spring 31, the rotation of the rotating shaft 27 and the winding shaft 12
Friction is applied to the first rotation of li'', thereby applying tension to the microcapsule paper 11.

During this copying operation, when the microcapsule paper 22 is separated by the separation mechanism 17d via the pressure developing device 18, the winding by the winding shaft 19 is stopped, and the unexposed portion of the microcapsule paper 11 (the exposure stage 10 is An operation is performed to unwind the unexposed area /))) that has passed. That is, a motor (not shown) of the return mechanism 33 is driven to rotate the gear 34 in the direction of arrow Z in FIG. 6 (the direction in which the microcapsule paper 1 is wound). 11 back in the afternoon. In addition, microcapsule paper 1
The rewinding length of 1 is detected by an encoder (not shown), and the rewinding operation is stopped in response to this detection.

On the other hand, when the microcapsule paper 11 is used up and the cartridge 14 is replaced with a new one, the lid member 16 is first opened. The linking mechanism 35 operates based on this opening operation, and thereby the rotating shaft 2
7 is moved in the direction of arrow B, and the rotating shaft 27 that was engaged with the winding shaft 12 is disengaged from the winding shaft 12. Therefore, the cartridge 14 can be taken out without any problem.

Then, with the lid member 16 in the open state, a new cartridge is stored in the cartridge storage portion 15, and the lid member 16 is closed. Based on this closing operation, the linking mechanism 35 operates, whereby the rotating shaft 27 is moved in the direction of arrow A and engages with the winding shaft of a new cartridge.

In this way, during the subsequent copying operation, as described above, good friction is applied to the winding shaft when pulling out the microcapsule paper, and when rewinding, the winding shaft is rotationally driven in the direction of arrow Z. Ru.

According to this embodiment, the rotating shaft 27 is provided in the sleeve 26 so as to be able to engage with the winding shaft 12, and the rotating shaft 27 is set in the direction in which the microcapsule paper 11 is rewound by the unwinding mechanism 33. Since the microcapsule paper 11 is rotated in the direction shown in FIG. Further, since an end plate 29 is provided on the rotating shaft 27 so as to rotate integrally therewith, and a felt 30 serving as a friction resistance member is pressed against the end plate 29 by a spring 31, the winding shaft Friction can be applied to the rotation of the paper 12, and tension can be applied to the microcapsule paper 11 as before. Furthermore, since the rotary shaft 27 can be detached from the winding shaft 12, cartridges can be replaced without any trouble.

In addition, in the above embodiment, the linking mechanism 35 is provided, and the winding 1
Although the engagement and disengagement of the rotating shaft 27 with respect to dl l 2 is linked to the closing and opening of the lid member 16, the engagement and disengagement do not have to be linked to the opening and closing of the lid member 16 (the linking mechanism 35 is ), the engagement and disengagement may be performed manually. Further, in the above embodiment, the compression coil spring 31 is used as the biasing member and is provided inside the sleeve 26, but the biasing member is constructed from a tension coil spring and this tension coil spring is provided outside the sleeve 26. Alternatively, the rotary shaft 27 may be biased to move in the direction of arrow B from the outside. In this case, the end plate 29 rotates integrally with the rotating shaft 27 and is configured to move in the axial direction with respect to the rotating shaft 27 without folding.

In addition, the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the scope of the invention.

[Effects of the Invention] As is clear from the above description, the present invention not only does not impair the replaceability of photosensitive paper cartridges, but also provides friction to the rotation of the winding shaft of the cartridge. It has excellent effects such as being able to apply tension to the paper and also being able to smoothly rewind the photosensitive paper while maintaining this friction.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 and 2 are longitudinal sectional front views of main parts in different operating states, FIG. 3 is a view showing the end surface of the winding shaft, and FIGS. 4 and 5. The drawings are side views of the linking mechanism portion in different operating states, FIG. 6 is a longitudinal sectional side view showing the overall general configuration, and FIG. 7 is a longitudinal sectional front view of the cartridge accommodating portion showing a conventional example. In the figure, 11 is microcapsule paper (photosensitive paper), 12 is a winding shaft, 13 is a case, 14 is a cartridge, 15 is a cartridge housing part, 16 is a lid member, 19 is a winding shaft, 22 is a developer paper, 26 is the sleeve, 27 is the rotating shaft, 2 is the end plate,
30 is a felt (friction resistance member), 31 is a spring (biasing member), 33 is a rewinding mechanism, 34 is a gear, and 35 is a linking mechanism.

Claims (1)

[Claims] 1. A cartridge comprising photosensitive paper wound around a winding shaft and housed in a case is stored in a cartridge storage part, and the photosensitive paper is wound up by the winding shaft, in which the winding is placed in the cartridge storage part. a sleeve fixed to face the rotating shaft in the axial direction; a rotating shaft rotatably provided within the sleeve and capable of engaging and disengaging from the winding shaft; and a rotating shaft provided in the cartridge storage section. a rewinding mechanism for rotationally driving the rotating shaft in a direction in which the photosensitive paper is rewound into the case of the cartridge; an end plate provided on the rotating shaft so as to rotate integrally with the rotating shaft; An image forming apparatus comprising: a frictional resistance member disposed between the sleeve and the frictional resistance member; and a biasing member that presses and biases the end plate against the frictional resistance member.