JPH0781788A - Paper feeding device - Google Patents

Abstract

PURPOSE:To provide a low-cost paper feeding device, which is constituted to reduce lowering of transfer sheet adhesive strength and prevent the occurrence of defective separation, through simple constitution by providing an adhesive member consisting of an adhesion belt coated with an adhesive or integrally formed of an adhesive material. CONSTITUTION:A adhesion belt 1 is run in a loop-form state around and between a drive roller 2 and a driven roller 3. The drive roller 2 is rotated counterclockwise by a drive means and the adhesion belt 1 is rotated in the same direction. A paper feeding device is arranged rotatably around the drive roller 2 serving as a fulcrum. Further, the adhesion belt 1 is coated with an adhesive mass capable of repeating adhesion and peel. When paper feed operation is started, the front in a paper feed direction of the bottom plat of a cassette is pushed up, the upper surface of a transfer sheet bundle 4 is brought into contact with the adhesion belt 1, and a topmost transfer paper is adhered thereto. The bottom plate of the cassette is then lowered to an initial position and the topmost transfer sheet is separated away from a second and following transfer sheet. Simultaneously, the drive roller 2 is rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a printer, a facsimile, etc., and a paper feeding apparatus for feeding stacked recording sheets or originals separately.

[0002]

2. Description of the Related Art Conventionally, in image forming apparatuses such as copiers, printers and facsimiles, a sheet feeding device for separating sheets or originals one by one from the viewpoint of operability and the like by utilizing friction. Is widely used. As a sheet feeding device utilizing this friction, a corner claw type, a friction pad type, and an FRR type sheet feeding device are well known.

In the corner claw type paper feeder, a calling roller presses the paper against the corner claws provided at both corners of the leading edge of the paper to bend the paper so that only one sheet is ejected from the corner claw.

In the friction pad type paper feeding device, a friction roller (friction member) is pressed against the calling roller in front of the calling roller and the sheet advancing direction, and two sheets of paper are called to connect the calling roller and the friction member. When the sheet enters between the two, the uppermost sheet is advanced by the rollers, the second sheet is prevented from advancing by the friction member, and only the uppermost sheet is advanced.

The FRR type sheet feeding device is a sheet feeding device which has been widely used in recent years, and includes a feeding roller that rotates in the sheet feeding direction, a pressure roller that is pressed against the feeding roller to form a pair, and a torque limiter. And a friction roller to which a driving force is applied in a direction opposite to the feeding direction, and the friction roller rotates together with the feeding roller when the friction roller is in direct contact with the feeding roller,
When the number of sheets is one, the friction roller rotates together with the feeding roller. When the number of sheets is two or more, the friction roller rotates in the returning direction to separate the sheets.

[0006]

However, in the paper feed device of the corner claw system, there is a limit to the thickness of the paper that can be separated (strength of the waist), and the range of the paper thickness is narrow. There is. There is also a problem that the corner claws get in the way when setting the paper.

Further, in the friction pad type paper feeding device, the driving torque is increased, the separation noise is generated, the ADF is rubbed and smeared in the case of a pencil document, the paper dust is generated, and the nip between the calling roller and the friction member is used. There are problems such as sticking to the transfer paper.

Further, in the FRR type sheet feeding device, there are problems such as an increase in driving torque, dirt on the front end of the sheet due to the friction roller, and cost increase due to complication of the mechanism.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in the conventional sheet feeders and to provide a low-cost sheet feeder with a simple structure.

[0010]

SUMMARY OF THE INVENTION According to the present invention, the above-mentioned problem is solved by an adhesive separation system in which an adhesive member is adhered to the upper surface of a stacked sheet stack to separate and call the uppermost sheet from the second and subsequent sheets. In the paper feeding device of 1, the adhesive member is formed by applying an adhesive that can repeat adhesion and peeling or forming an adhesive belt integrally formed of an adhesive material.

Further, in order to solve the above-mentioned problems, the present invention is provided so that the adhesive belt is stretched between at least two supporting rollers and can be wound or rotated to feed the adhered paper. Of the at least two rollers, the support roller on the downstream side in the sheet feeding direction is configured to have a diameter such that the adhered sheet is separated by curvature separation when the adhesive belt is turned along the roller. suggest.

Further, in order to solve the above-mentioned problems, the present invention is provided with a reflection type sensor for detecting a sheet to be fed near the supporting roller on the downstream side in the sheet feeding direction, and the sheet to be fed is provided. It is proposed to judge the life of the adhesive force of the adhesive belt according to the peeled state.

Further, in order to solve the above-mentioned problems, the present invention provides a protective member for protecting the adhesive surface of the adhesive belt, and the protective member releases the protection of the adhesive surface during the paper feeding operation. To propose.

Further, in order to solve the above-mentioned problems, the present invention proposes to provide a pressurizing means for pressing the adhesive belt to the paper when the adhesive belt and the paper are adhered.

Further, in order to solve the above-mentioned problems, the present invention is such that the adhesive belt is provided with an adhesive surface in a predetermined range and has a display mark indicating the position of the adhesive surface, and the adhesive belt is provided in the vicinity of the adhesive belt. It is proposed that a sensor that detects the display mark is provided and that the adhesive surface is stopped at a predetermined position by a detection signal of the sensor when the adhesive belt is stopped.

Further, in order to solve the above-mentioned problems, the present invention proposes to provide a pressing member near both sides of the adhesive belt to bend the adhered paper.

Further, in order to solve the above-mentioned problems, the present invention provides a paper conveying means within the paper feeding range of the adhesive belt, and winds the adhesive belt at a timing of image formation of the image forming apparatus. It is proposed that the sheet is fed by being picked up or rotated, and is delivered to the sheet conveying means to convey the sheet.

[0018]

[Function] An adhesive belt coated with an adhesive capable of repeating adhesion and peeling or an adhesive belt integrally formed by a similar adhesive material is adhered to the upper surface of the sheet bundle, and the uppermost sheet is the second sheet or later. Separate from the paper and call.

Other functions will be apparent from the description of the embodiments below.

[0020]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing a schematic configuration of a sheet feeding device according to an embodiment of the present invention. As shown in this figure, the adhesive belt 1 is looped around the driving roller 2 and the driven roller 3. The driving roller 2 is rotated in the counterclockwise direction (the direction of arrow H) in the figure by a driving unit (not shown), and the adhesive belt 1 is rotated in the same direction. Further, the sheet feeding device of this embodiment is rotatably provided with the driving roller 2 as a fulcrum. When setting the stack of transfer paper 4 at the paper feed position,
The drive roller 2 is rotated upward as a fulcrum and is retracted to the position shown by the chain double-dashed line in the figure, which facilitates setting of the transfer sheet bundle. Then, at the time of sheet feeding, the drive roller 2 is rotated counterclockwise in the figure to reach a predetermined sheet feeding position shown by a solid line in the figure. The adhesive belt 1 is coated with an adhesive capable of repeating adhesion and peeling, for example, an adhesive used in Post-it (trade name), and the adhesion and peeling of transfer paper can be repeated. It is possible. Also, the adhesive belt 1
Instead of applying an adhesive, the belt may be integrally formed as a belt by using an adhesive material having similar properties.

FIG. 2 is a side view for explaining the separating and feeding operation of the transfer sheet by the sheet feeding device of this embodiment. In this figure, as shown in (a), the cassette 5 on which the transfer sheet bundle 4 is stacked is set at the sheet feeding position of the main body device (not shown). Then, when the paper feeding operation is started, as shown in (b), the bottom plate pushing-up mechanism (not shown) pushes up the front side of the cassette bottom plate in the paper feeding direction, and the upper surface of the transfer sheet bundle 4 contacts the adhesive belt 1. Then, the uppermost transfer paper is adhered. Then
As shown in (c), the cassette bottom plate is lowered to the initial position, and the uppermost transfer sheet is separated from the second and subsequent transfer sheets.
At the same time, the drive roller 2 rotates in the direction of arrow H, and the uppermost transfer sheet is fed in the direction of arrow F.

By the way, the driving roller 2 is the adhesive belt 1
The transfer paper adhered to the adhesive belt 1 is separated (curvature separation) from the adhesive belt 1 due to the relationship between the strength of the waist and the adhesive force due to the turning along the drive roller 2 when the roller rotates. It is composed of various diameters. Therefore, when the adhesive belt 1 to which the transfer paper is adhered rotates in the direction of the arrow H,
At the position of the drive roller 2, the adhesive belt 1 turns upward, the transfer paper is separated from the end of the adhesive belt 1 and sent out, and is transferred to a conveying roller (not shown) provided on the downstream side in the paper feeding direction. Are transported. Therefore, the transfer paper can be separated and fed without the means for moving the entire device in the paper feeding direction while the transfer paper is adhered and the means for peeling the adhered paper, which simplifies the structure of the paper supply device. can do.

Further, as described above, since the adhesive belt 1 can repeat the adhesion and the peeling of the transfer paper, the adhesive force does not decrease and the separation performance does not decrease.

FIG. 3 is a side view for explaining the sheet feeding device of another embodiment of the present invention and its operation. As shown in this figure, the sheet feeding device of this embodiment is fixedly installed in parallel with the stacked transfer sheet bundle 4. Then, when the transfer sheet bundle 4 is set at the sheet feeding position as shown in (a), (b)
As shown in FIG. 5, the transfer paper stack 4 is raised in parallel by an unillustrated up-and-down mechanism so that the upper surface of the transfer paper 4 comes into contact with the paper feeding device,
The uppermost transfer paper is adhered to the lower surface of the adhesive belt 11.
Next, as shown in (c), the transfer sheet bundle 4 descends to separate the uppermost transfer sheet from the second and subsequent transfer sheets. At the same time, the drive roller 12 rotates in the direction of arrow H and feeds the uppermost transfer sheet in the direction of arrow F.

As still another embodiment of the present invention, the transfer sheet bundle 4 may not move up and down, but the sheet feeding device may move up and down in parallel.

FIG. 4 is a side view showing still another embodiment of the present invention. As shown in this figure, in the paper feeding device of this embodiment, the adhesive belt 21 is stretched over three support rollers to form a triangular shape. Other configurations and operations are similar to those of the above-described embodiment described with reference to FIG.
The description is omitted.

FIG. 5 is a side view showing still another embodiment of the present invention. As shown in this figure, in the paper feeding device of this embodiment, the adhesive belt 31 is stretched from the feeding roller 33 to the take-up roller 32 via the outside of the peeling roller 34. Reference numeral 35 is a protective cover for protecting the adhesive belt 31 from dust and the like. In the present embodiment, when the transfer sheet bundle 4 rises and the uppermost transfer sheet adheres to the adhesive belt 31, the transfer sheet bundle 4 descends and separates only the uppermost transfer sheet. At the same time, the take-up roller 32 rotates to rotate the adhesive belt 31 and start feeding the transfer sheet rightward in the drawing. The transfer paper is peeled from the adhesive belt 31 when the peeling roller 34 turns the adhesive belt 31. Then, when the transfer sheet is delivered to the conveying roller (not shown) arranged on the downstream side in the feeding direction, the rotation of the take-up roller 32 is stopped and the feeding roller 33 is provided.
Rotates in the opposite direction to wind up the adhesive belt 31.

FIG. 6 is a side view showing still another embodiment of the present invention. As shown in this figure, the sheet feeding device of this embodiment is provided with two adhesive surfaces 21a and 21b at predetermined positions on an adhesive belt 21 stretched in a triangular shape.
Although not shown in the drawing, the adhesive surface 21 is attached to the adhesive belt 21.
Display marks indicating the positions of a and 21b are provided. A sensor 26 for detecting the display mark is installed near the adhesive belt 21. Further, a belt protection unit 22 is arranged above the adhesive belt 21. The belt protection unit 22 has two protection tapes 23.
It is configured so as to be stretched around book supporting rollers 24 and 25. The protection unit 22 is provided so as to be rotatable around a support roller 24 as a fulcrum, and is located at the position shown in (a) when the paper feeding device is stopped, and the lower surface of the protection tape 23 is on the upper slope of the adhesive belt 21. Touching. Then, when the transfer sheet bundle (not shown) rises to the adhesive position during the sheet feeding operation, the protection unit 22 rotates counterclockwise in the figure to the position shown in (b). At this time, the protective tape 23 is separated from the adhesive belt 21 and does not hinder the rotation of the adhesive belt 21.

In this embodiment, the position of the display mark is detected by the sensor 26 when the adhesive belt 21 is rotated, and the positions of the adhesive surfaces 21a and 21b are determined based on the detected position. When stopping the rotation of the adhesive belt 21,
The adhesive surfaces 21a and 21b are controlled so as to stop at predetermined positions. In this embodiment, the end of the adhesive surface (21a in the figure) that stops on the side where it adheres to the transfer paper is the appropriate amount of the front end in the paper transfer direction (direction of arrow F) behind the transfer paper front end in the paper transfer direction. To be stopped. Therefore, when the stack of transfer paper is moved up to the adhesive position and the uppermost paper is adhered to the adhesive surface, the leading end of the transfer paper comes out an appropriate amount forward of the adhesive surface and is adhered. Therefore, since the front end of the transfer paper is not adhered to the adhesive surface, the transfer paper may peel off from the adhesive surface when the adhesive belt 21 rotates and the adhesive surface comes to the position of the support roller 27 and turns upward. Force is stronger than when the tip of the transfer paper is glued,
The transfer paper can be surely peeled off. Further, when the adhesive belt 21 is stopped, the adhesive surface located on the upper side (in the figure,
21b) is protected by the protective tape 23, and it is possible to prevent dust and the like from falling and deteriorating the adhesive performance.

FIG. 7 is a side view showing still another embodiment of the present invention. As shown in this figure, two support rollers 4
A belt protection unit 42 is arranged above the adhesive belt 41 stretched over the sheets 6 and 47. The belt protection unit 42 includes support rollers 44 and 45 having two protection tapes 43.
It is built over. This protection unit 42
Is fixedly installed. On the other hand, the adhesive belt 41 is rotatably provided with the support roller 46 as a fulcrum,
Normally, the protective tape 4 is located at the position indicated by the chain double-dashed line in the figure.
The lower surface of 3 is in contact with the upper surface of the adhesive belt 41. Then, when the adhesive belt 41 is rotated to the position shown by the solid line in the figure for separating and feeding the transfer paper, the adhesive belt 41 is separated from the protective tape 43. Therefore, the protective tape 43 does not hinder the rotation of the adhesive belt 41.

In this embodiment, the upper surface of the adhesive belt 41 is protected by the protective tape 43 except when the transfer paper is separated and fed, and dust or the like is prevented from falling on the adhesive belt 41 to deteriorate the adhesive performance. be able to.

FIG. 8 is a partial sectional view showing still another embodiment of the present invention. As shown in this figure, in the paper feeding device of this embodiment, an adhesive belt 51 is stretched around a supporting roller 52 and another supporting roller (not shown). And
A pair of separating members 53 are supported by springs 54 on both sides of the supporting roller 52, and are attached to a machine frame (not shown). As shown in (a), the transfer sheet bundle 4 moves up to the adhesive position and the uppermost sheet is adhered to the adhesive belt 51. Then, as shown in (b), the transfer sheet bundle 4 descends to the normal position. At this time, the spring 54 extends due to the weight of the separating member 53, and the lower surface of the separating member 53 falls below the adhesive belt 51. . As a result, the adhesive belt 5
The transfer paper adhered to No. 1 is pressed by the separating members 53 on both sides of the adhered portion, and the adhered transfer paper is bent. Therefore, even if multiple sheets of transfer paper are attached to the topmost paper without being separated due to static electricity, etc., the transfer papers other than the topmost paper are dropped by giving bending to the topmost paper. Only the upper transfer paper is separated.

FIG. 9 is a side view showing still another embodiment of the present invention. As shown in this figure, in the paper feeding device of this embodiment, the adhesive belt 61 has three support rollers 62, 63, and 6.
It is hung on 4 to form a triangular shape. A sponge-like pressure member 65 is disposed between the lower support rollers 62 and 63, and the lower surface of the pressure member 65 is the support roller 62,
It projects outside the line connecting the lower surfaces of 63. Therefore, the adhesive belt 61 is configured to project outside the line connecting the lower surfaces of the support rollers 62 and 63. In the present embodiment, when the sheet bundle 4 rises, the sheet bundle 4 and the adhesive belt 61 are brought into pressure contact with each other while the pressure member 65 is elastically deformed to press the adhesive belt 61. Therefore, the uppermost sheet is sufficiently adhered to the adhesive belt 61, and adhesion failure does not occur.

FIG. 10 is a side view showing still another embodiment of the present invention. As shown in this figure, in the paper feeding device of this embodiment, an adhesive belt 71 is stretched over two supporting rollers 72 and 73. A pressure plate 74 made of a leaf spring is provided below the support rollers 72 and 73, and the adhesive belt 7
1 is projected to the outside. Then, similarly to the embodiment described with reference to FIG. 9, with the pressure plate 74 pressing the adhesive belt 71, the sheet bundle (not shown) and the adhesive belt 71 are pressed.
Since and are brought into pressure contact with each other, the uppermost sheet is sufficiently adhered to the adhesive belt 71, and adhesion failure does not occur.

FIG. 11 is a side view showing still another embodiment of the present invention. As shown in this figure, in the paper feeding device of this embodiment, an adhesive belt 81 is stretched around two supporting rollers 82 and 83. One of the support rollers 82 is movably provided, and is normally urged by a spring 84 to be in a position shown by a dotted line to tension the adhesive belt 81. If the adhesive belt 81 reaches the end of its life,
It is possible to easily replace the adhesive belt 81 by moving the support roller 82 to the position shown by the solid line to loosen the tension of the adhesive belt 81.

FIG. 12 is a perspective view showing a replacement adhesive belt, in which a protective tape 85 is adhered to the outside of the adhesive belt 81 ', that is, the adhesive surface. A protrusion 85a is provided at one end of the protective tape 85, and the protective tape 85 can be easily attached by pulling the protrusion 85a after mounting the replacement adhesive belt 81 'on the sheet feeding device.
It can be peeled off from 1 '.

FIG. 13 is a perspective view showing a transfer paper package packed with a replacement adhesive belt 81 '. As shown in this figure, a replacement adhesive belt 81 ′ is packed with an adhesive tape 87 on the upper surface of the transfer paper package 86. As described above, since the protective tape 85 is adhered to the outer side of the adhesive belt 81 ', the pack adhesive tape 87 does not adhere to the adhesive belt 81'. Then, the replacement adhesive belt 81 'can be easily taken out by peeling off the pack adhesive tape 87.

FIG. 14 is a side view showing still another embodiment of the present invention. As shown in this figure, in the paper feeding device of this embodiment, the adhesive belt 91 has three supporting rollers 92, 93,
It has been passed over to 94. One of the three supporting rollers 92 is movably provided. Under normal conditions, the adhesive belt 91 is tensioned by being biased by the spring 95 and located at the position indicated by the dotted line. And FIG.
Similar to the above-described embodiment described with reference to FIG.
Can be moved to the position indicated by the solid line to easily replace the adhesive belt 91.

FIG. 15 is a side view showing still another embodiment of the present invention. As shown in the figure, in the paper feeding device of this embodiment, an adhesive belt 11 is stretched over two supporting rollers 12 and 13, and a pair of conveyance rollers 14 is provided downstream of the paper conveyance direction. Has been. In the present embodiment, the position where the transport roller 14 is provided is two support rollers 1.
Than the length L ₁ of the adhesive surface of the adhesive belt 11 is the distance between 2 and 13, is installed from the support rollers 12 in the conveying direction downstream side as towards the distance L ₂ until the conveying roller pair 14 is shorter There is. Therefore, after separating only the uppermost paper of the transfer paper stack 4, the transfer paper feeding is started by rotating the adhesive belt 11 in the direction of the arrow H, and the transfer paper peeled from the adhesive belt 11 is conveyed by the transport roller. It can be reliably delivered to the pair 14. When the leading edge of the transfer sheet enters the pair of transport rollers 14,
The transfer sheet is conveyed by the pair of conveying rollers 14. And
It is possible to adjust the transfer timing of the transfer paper by adjusting the drive timing of the adhesive belt 11. Therefore, when the sheet feeding device of this embodiment is attached to, for example, an electrophotographic image forming apparatus, the registration roller for adjusting the transfer timing of the toner image can be omitted. Even without the registration roller, the transfer timing of the transfer sheet can be adjusted by the drive timing of the adhesive belt 11 to set the transfer timing of the toner image on the transfer sheet.
It should be noted that in the present embodiment, the conveying roller pair 14 may be constantly rotating.

FIG. 16 is a side view showing still another embodiment of the present invention. As shown in this figure, in the sheet feeding device of this embodiment, a spray can 15 in which an adhesive is sealed is installed above the adhesive belt 11. The spray can 15 can direct the ejection of the adhesive from the main body of the device (not shown), and when the adhesive performance of the adhesive belt 11 deteriorates,
Alternatively, the adhesive can be supplied to the adhesive belt 11 by ejecting the adhesive at regular intervals.

FIG. 17 is a side view showing still another embodiment of the present invention. As shown in this figure, the paper feeding device of this embodiment is provided with an adhesive tank 16 containing an adhesive near the adhesive belt 11. Further, an application roller 18 is provided in contact with the adhesive belt 11, and a suction roller 17 is provided in contact with the application roller 18. Wicking roller 17
The lower part of is immersed in the adhesive contained in the adhesive tank 16, and the adhesive is supplied to the adhesive belt 11 via the suction roller 17 and the application roller 18. Therefore,
The adhesive performance of the adhesive belt 11 is always maintained.

FIG. 18 is a side view showing still another embodiment of the present invention. As shown in this figure, the sheet feeding device of this embodiment is provided with a reflective sensor 19 near the adhesive belt 11. In the reflection type sensor 19, the transfer paper 4a is the adhesive belt 1
The life of the adhesive force of the adhesive belt 11 can be determined by detecting the curl amount t when peeled from 1. That is, when the adhesive force of the adhesive belt 11 is strong, the curl amount t is large, and when the adhesive force is weak, the curl amount t is large.
Becomes smaller.

[0044]

As described above, according to the paper feeding device of the present invention, the adhesive belt integrally coated with the adhesive belt or the similar adhesive material coated with the adhesive capable of repeating the adhesion and the peeling. Since the transfer paper is adhered and separated by the belt, the decrease in the adhesive strength of the transfer paper is small, and the separation failure can be prevented.

According to the second aspect of the invention, since the transfer paper adhered by winding or rotating the adhesive belt can be fed and the transfer paper can be separated from the adhesive belt by curvature separation, the transfer paper can be separated. The transfer paper adhered to the adhesive belt can be delivered to the conveying roller or the like in the next step without providing the means and the moving means, and the configuration of the paper feeding device can be simplified.

According to the third aspect, the life of the adhesive force of the adhesive belt can be judged from the peeled state of the transfer paper.

According to the structure of claim 4, since the adhesive surface of the adhesive belt is protected by the protective member, the adhesive force can be maintained. Further, since the protection member releases the protection of the adhesive surface during the paper feeding operation, the protection member does not interfere with the paper feeding operation.

According to the fifth aspect of the invention, since the adhesive belt is brought into pressure contact with the transfer paper when the transfer paper is adhered, the transfer paper can be surely adhered.

According to the structure of claim 6, since the adhesive surface provided in a predetermined range of the adhesive belt can be stopped at a predetermined position, when the paper is adhered to a position where it can be easily peeled off and a protective member is provided. The adhesive surface can be stopped at the position of the protective member.

According to the seventh aspect of the invention, since the adhered paper is bent, the separation from the second and subsequent papers can be made more reliable.

According to the eighth aspect of the invention, the sheet can be fed at the image forming timing of the image forming apparatus, so that the registration roller of the image forming apparatus can be omitted.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a paper feeding device of the present invention.

FIG. 2 is a side view illustrating the operation of the paper feeding device.

FIG. 3 is a side view showing another embodiment of the present invention.

FIG. 4 is a side view showing still another embodiment of the present invention.

FIG. 5 is a side view showing still another embodiment of the present invention.

FIG. 6 is a side view showing still another embodiment of the present invention.

FIG. 7 is a side view showing still another embodiment of the present invention.

FIG. 8 is a partial sectional view showing still another embodiment of the present invention.

FIG. 9 is a side view showing still another embodiment of the present invention.

FIG. 10 is a side view showing still another embodiment of the present invention.

FIG. 11 is a side view showing still another embodiment of the present invention.

FIG. 12 is a perspective view showing a replacement adhesive belt.

FIG. 13 is a perspective view showing a transfer paper package in which the replacement adhesive belt shown in FIG. 12 is packed.

FIG. 14 is a side view showing still another embodiment of the present invention.

FIG. 15 is a side view showing still another embodiment of the present invention.

FIG. 16 is a side view showing still another embodiment of the present invention.

FIG. 17 is a side view showing still another embodiment of the present invention.

FIG. 18 is a side view showing still another embodiment of the present invention.

[Explanation of symbols]

 1, 11, 21, 31 Adhesive belt 2 Drive roller 3 Followed roller 4 Transfer paper bundle 19 Reflective sensors 21a, 21b Adhesive surface 22, 42 Protection unit 26 Mark detection sensor 32 Winding roller 33 Sending roller 41, 51, 61, 71, 81 Adhesive belt 53 Pressing member 65 Pressing member 74 Pressing plate 81 Replacement adhesive belt

Claims (8)

[Claims] 1. In an adhesive separation type sheet feeding device in which an adhesive member is adhered to an upper surface of a stacked sheet stack and the uppermost sheet is separated from the second and subsequent sheets and called. A sheet feeding device comprising a pressure-sensitive adhesive belt which is integrally formed of a pressure-sensitive adhesive which can be repeatedly peeled off or which is made of a pressure-sensitive adhesive material. 2. The adhesive belt is stretched between at least two supporting rollers and is provided so as to be able to feed a sheet that has been wound or rotated and adhered, and a sheet feeding direction of the at least two rollers. The sheet feeding device according to claim 1, wherein the support roller on the downstream side is configured to have a diameter such that the adhered sheet is separated by curvature separation when the adhesive belt is turned along the roller. . 3. A reflection type sensor for detecting a sheet to be fed is provided in the vicinity of a supporting roller on the downstream side of the sheet feeding direction, and the life of the adhesive force of the adhesive belt is determined by the peeling state of the fed sheet. The sheet feeding device according to claim 2, wherein the sheet feeding device makes a determination. 4. The paper feed according to claim 1, wherein a protective member for protecting the adhesive surface of the adhesive belt is provided, and the protective member releases the protection of the adhesive surface during a paper feeding operation. apparatus. 5. The paper feeding device according to claim 1, further comprising a pressing unit that presses the adhesive belt against the paper when the adhesive belt and the paper are adhered to each other. 6. The pressure-sensitive adhesive belt is provided with a pressure-sensitive adhesive surface within a predetermined range and has a display mark indicating the position of the pressure-sensitive adhesive surface, and a sensor for detecting the display mark is provided in the vicinity of the pressure-sensitive adhesive belt. The sheet feeding device according to claim 2, wherein the adhesive surface is stopped at a predetermined position by a detection signal of the sensor when stopped. 7. The paper feeding device according to claim 2, wherein a pressing member for bending the adhered paper is provided near both sides of the adhesive belt. 8. A sheet conveying means is provided within a sheet feeding range of the adhesive belt, and the sheet is fed by winding or rotating the adhesive belt at an image forming timing of an image forming apparatus. The sheet feeding device according to claim 2, wherein the sheet is conveyed by being delivered to a sheet conveying unit.