JP2015098367A - Medium carrier device, medium delivery device, and medium accumulation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medium carrier device, a medium delivery device and a medium accumulation device, which can perform cleaning after dust or garbage stuck on an adhesive part, and in which even the sticking force of the adhesive part after cleaned can restore the adhesive force of an initial level.SOLUTION: A medium carrier device comprises: a first roller; a second roller having heating means; a belt born on the first roller and the second roller and having an adhesive part having a temperature sensitive adhesive applied thereto; and cleaning means for the belt. The heating means heats the temperature sensitive adhesive to a temperature equal to or higher than a melting point of the temperature sensitive adhesive. The cleaning means is brought into contact with the adhesive part at a temperature less than the melting point and less than a glass transition temperature, thereby to remove a substance adhered to the adhesive part.

Description

  The present invention relates to a medium conveying device, a medium feeding device, and a medium stacking device.

  Conventionally, as a medium conveying apparatus for conveying a medium, a medium feeding apparatus for feeding out a medium, and a medium accumulating apparatus for accumulating a medium, a vacuum suction force, a friction force by a high friction counting member, and an adhesive force by an adhesive member are used. There is something used. As an apparatus using adhesive force, Patent Document 1 discloses that the transport surface of the transport roller is formed of an adhesive material having a predetermined adhesive force, so that the paper can be reliably transported by the adhesive force and double feed is caused. A paper feeding device that can be made difficult is disclosed. Patent Document 2 discloses a transport belt that has a layer whose adhesive strength can be changed at room temperature or high temperature, and can obtain adhesive strength according to processes such as transport, peeling, cleaning, and transfer of a medium. It is disclosed.

Japanese Patent Laid-Open No. 7-315592 JP 2006-232512 A

  When the adhesive strength is used, it is difficult to reproduce the initial adhesive strength even if the adhesive strength of the adhesive is lost to make it non-adhesive and cleaning is performed with a simple cleaning brush or cloth. In order to restore the adhesive strength by performing cleaning, it is necessary to increase the adhesive strength of the cleaning means. This is because once dust or dust adheres to the adhesive, particularly fine dust or dust enters the inside of the adhesive in the adhesive state, and when it becomes non-adhesive, the adhesive itself hardens and enters the inside. It is thought that dust and dust are attached to the adhesive and are difficult to remove.

  In the present invention, a medium conveying device, a medium feeding device, and a cleaning device that can easily perform cleaning after dust or dust adheres to the adhesive portion and can restore the initial adhesive strength of the adhesive portion after cleaning, and It is an object to provide a media stacking apparatus.

  In order to achieve the above-mentioned object, the present invention hangs on a first roller, a second roller provided with heating means, the first roller and the second roller, and a temperature-sensitive adhesive. A medium transporting device comprising a belt having an adhesive part coated with a belt, and a cleaning means for the belt, wherein the heating means causes the temperature-sensitive adhesive to exceed the melting point of the temperature-sensitive adhesive. The cleaning means is in contact with the adhesive part at a temperature lower than the melting point and lower than the glass transition temperature of the temperature-sensitive adhesive, and removes adhering matter adhering to the adhesive part. And Other means will be described in the embodiments.

  According to the present invention, cleaning after dust or dust adheres to the adhesive portion can be easily performed, and the adhesive strength of the adhesive portion after cleaning can be restored to the initial level of adhesive force, and repeated adhesive operations are performed. It is possible to provide a medium conveying device, a medium feeding device, and a medium stacking device that can be used. Other effects will be described in Examples.

Diagram showing media transport device View of medium transport device from above The figure which showed the medium conveyance device which the conveyance surface bent in convex shape The figure which showed the modification of a medium conveying apparatus Diagram showing media feeding device The figure which showed the modification of the medium supply apparatus The figure which showed the modification of the medium supply apparatus The figure which showed the modification of the medium supply apparatus Diagram showing media stacking device Diagram showing the characteristics of the adhesive Figure showing the cleaning means

The medium conveying apparatus, medium feeding apparatus, and medium stacking apparatus in the present invention will be described based on the following.
(1) Configuration of Medium Conveying Device First, the medium conveying device according to the present invention will be described. FIG. 1A is a diagram illustrating a medium conveying device including a belt having an adhesive portion on a contact surface with a medium (paper sheet or the like). The medium conveyance device 200 </ b> A includes a driving roller (first roller) 201, a heat roller (second roller) 202, a conveyance belt (conveyance unit) 203, and a conveyance guide 204.

  The driving force of the driving roller 201 is transmitted from a driving source 201D such as a motor via a driving torque transmission mechanism. The heat roller 202 is connected to power supply means, and is turned on by a power-on operation command signal from a control means connected to the power supply means to heat a heater (heating means) inside the heat roller. The conveyance belt 203 is hung between the driving roller 201 and the heat roller 202, and a sheet-side conveyance surface is coated with a temperature-sensitive adhesive described later. When the heat roller 202 is heated, the conveyance surface is conveyed. Adhesive strength is developed. The conveyance guide 204 is installed so that the upper surface is in contact with the conveyance belt 203. Thereby, it is possible to suppress sagging of both ends of the conveyed paper sheet P, suppression of flapping during conveyance, flapping of the conveyance belt 203, and bending due to its own weight.

  In addition to the heat roller 202 described above, the heating means may be, for example, a means for heating by generating heat radiation from a light source or an eddy current on the roller surface.

  Further, since the conveyance belt 203 is heated at the contact portion with the heat roller 202, the temperature is lowered before the conveyance belt 203 is rotated to the contact portion with the heat roller 202 again. When the temperature is lowered, the adhesive force of the conveyor belt 203 may be reduced or disappear. To prevent this, the heating temperature of the heat roller 202 is set to the downstream side media conveyor device that requires the adhesive force of the conveyor belt 203. Even when the temperature of the conveyor belt 203 decreases due to heat radiation, the adhesive force of the conveyor belt 203 is set to be equal to or higher than the value necessary for the conveying operation. In order to minimize the temperature drop due to heat radiation during operation, it is desirable to use a material having a relatively large specific heat as the material of the conveyor belt 203.

  A transport roller 205 in contact with and opposed to the transport belt 203 is provided in the vicinity of the inlet on the upstream side (left side in FIG. 1A) of the medium transport device. The conveying roller 205 is pressed against the conveying belt 203 with a predetermined pressure by a spring 206 that is a pressure applying unit. When the paper sheet P is transported, an adhesive force is exerted on the transport belt 203, and the transport belt 203 and the transport roller 205 are opposed to each other with a predetermined pressure by the spring 206. It also acts on the surface of 205.

  At this time, in order to prevent the conveyance belt from being lifted or unstable due to the conveyance belt 203 sticking to the conveyance roller 205, at least the surface of the conveyance roller should be made of a material having a small surface energy (adhesive state). It is desirable that the material is also difficult to adhere to the adhesive part. Examples of the material having a small surface energy include Teflon (registered trademark), silicon, polyethylene, and polypropylene. In this embodiment, the surface of the conveyance roller 205 is coated with a Teflon film, and the surface of the conveyance belt 203 is between the surface and the conveyance belt 203. The adhesive force acting on the surface is reduced.

  Further, on the upstream side of the conveyance roller 205, a medium conveyance device (upstream medium conveyance device) including conveyance rollers 207A and 207B is provided, and the paper sheet P is conveyed from the upstream medium conveyance device. The paper sheet P conveyed from the upstream medium conveying device is guided by the inlet-side conveying guide 208, and the leading end thereof is sent between the conveying belt 203 and the conveying roller 205.

  An upper part of the medium transport device includes a magnetic sensor 209 for reading information recorded on the paper sheet P, an optical sensor 210, and a camera 211 for acquiring an image of the paper sheet. The magnetic sensor 209, the optical sensor 210, and the camera 211 obtain information and images recorded on the paper sheet P when a detection signal is generated from a paper sheet detection sensor (not shown) provided in the medium transport device. Start operation.

  Near the outlet on the downstream side (left side in FIG. 1A) of the medium conveying apparatus, a medium conveying apparatus (downstream medium conveying apparatus) including conveying rollers 212A and 212B is provided, and this downstream medium conveying apparatus The paper sheet P is conveyed to a paper sheet storage unit or the like. In addition, in order to enable accurate conveyance delivery of the paper sheet P, the conveyance guides 213A and 213B are provided between the medium conveyance device and the downstream medium conveyance device.

  Further, the conveyance guide 213 </ b> A has a function as a peeling unit that separates the paper sheet P adhered to the conveyance belt 203 from the conveyance belt 203. Specifically, the conveyance guide 213A is provided with a surface for guiding the paper sheet P from the anti-adhesion surface side (the lower side in FIG. 1A) to the adhesion surface of the conveyance belt 203, and the surface is downstream. It includes a point that intersects with the adhesive surface of the conveyor belt 203 when viewed from the side, and further has a surface shape that conveys and guides paper sheets to the downstream-side downstream medium conveyance device. . The paper sheet P adhered and conveyed to the conveyance belt 203 is peeled from the conveyance belt 203 by being peeled from the conveyance guide 213A at the intersection, and is guided to the conveyance guide 213A. Note that the adhesive force developed in the transport belt 203 is set so that the paper sheet P is normally transported without being transported while being adhered to the transport belt 203 during the peeling operation.

  In this way, by adopting a device for transporting paper sheets using a transport belt having adhesive force, transport means for transporting paper sheets, such as rollers, and transport guidance at the leading edge of the paper sheets are provided. The number of conveyance guides to be performed can be reduced, and the apparatus can be reduced in size and simplified. For example, by eliminating one of the transport guides, it becomes possible to improve the visibility of the transported object remaining inside the medium transport apparatus and the medium transport apparatus itself, and the transported object or foreign matter remaining inside the transport apparatus It is also effective in removing such as.

  In addition, by adhering the leading end of the paper sheet to be transported to the transport belt, it is easy to reduce the number of transport guides, and to the paper sheet generated when the leading edge of the paper sheet contacts the transport guide. It is possible to reduce buckling due to compressive force and conveyance jam due to abnormal deformation, and it is possible to improve the reliability of the conveyance device.

  As another medium conveying apparatus, when delivering paper sheets to the downstream medium conveying apparatus, a predetermined mark may be attached to the conveying belt 203 at predetermined intervals in order to accurately feed the paper sheets. good. Note that the interval at which the adhesive portion is provided is determined by the contact point of the conveyance rollers 212A and 212B of the downstream medium conveyance device, that is, the downstream medium conveyance device from the point that the peeling force acts on the conveyance object from the conveyance belt 203. It is set to be shorter than the distance to the point where the conveying force starts to act.

  At this time, as shown in FIG. 1B, the medium transport apparatus 200B has transported the sheet P to the upstream side of the medium transport apparatus and the mark detection means 220 attached to the transport belt 203. A detection means 221 for detecting this, a signal transmission means 223 for connecting the detection means 220 and the control means 222, and a signal transmission means 224 for connecting the control means 222 and the drive source 201D. The control system is configured so that drive control is possible.

  In the medium conveying apparatus shown in FIG. 1B, when the detection unit 221 detects the leading edge of the paper sheet P, the conveying speed of the upstream medium conveying apparatus set in advance, the conveying belt 203, the conveying roller 205, and the like. Based on the distance to the contact point, the time for which the paper sheet P is conveyed to the contact point is calculated. Further, the detection means 220 detects the mark attached to the conveyor belt 203, and based on this detection timing, the time when the adhesive portion of the conveyor belt 203 is driven to the contact point and the leading end of the sheet P The driving speed of the conveyor belt 203 is controlled so that the time at which the toner is conveyed to the contact point coincides. As a result, the leading end portion of the paper sheet P is adhered to the adhesive portion of the transport belt 203 and transported, so that it is possible to reduce the transport guide for guiding the transport of the paper sheet. It is possible to reduce obstacles such as a conveyance jam caused by the collision of the front end portions of the paper. In addition, since the peeling force from the transport belt 203 is generated only between the paper sheet and the adhesive portion of the transport belt, it is possible to reduce the trouble during the peeling operation caused by the excessive peeling force.

  2A is an overhead view of the medium conveying device 200A shown in FIG. 1A from above the device (the upper side of FIG. 1A). The medium conveyance device 200A shown in FIG. 2A is a medium conveyance device including two conveyance belts 203. However, the number of the conveyance belts 203 may be changed as appropriate according to the function realized by the medium conveyance device. May be. For example, when it is necessary to adhere the front side of the paper sheet so that the posture and position of the paper sheet do not shift during conveyance, as shown in FIG. The width of the conveying belt 203 may be made wider than the width-direction dimension of the conveyed paper sheet. As a result, the entire area of the bottom surface of the paper sheet adheres to the conveyance belt 203, so that the posture and positional deviation of the paper sheet hardly occur. Further, the number of the conveyor belts 203 may be three or more.

  FIG. 2C is a view of the medium transport apparatus 200B shown in FIG. 1B as viewed from above the apparatus (the upper side of FIG. 1B). At this time, since the adhesive section 203A is provided on the conveyor belt 203 at regular intervals and is not provided on the entire surface of the conveyor belt 203, high reliability is required for the posture of the paper sheet and the conveyance accuracy. This is effective when the paper sheet is not used or when the rigidity of the paper sheet is weak and a large peeling force cannot be applied during the peeling operation. Further, as described above, the conveyance belt 203 is provided with predetermined marks 203M at regular intervals.

  FIG. 3 shows a medium conveying apparatus in which the medium conveying surface formed by the conveying belt 203 is bent in a convex shape. In the medium transport apparatus 200 </ b> C shown in FIG. 3A, the transported paper sheet P is adhered by being pressed against the transport belt 203 by the transport roller 205. The adhesive force of the conveyance belt 203 is set to be larger than the restoring force due to the deformation even when the leading end portion of the paper sheet P is deformed at the convex bent portion. Specifically, the application thickness of the adhesive on the conveyor belt 203 is set so that a desired adhesive force can be expressed, and a predetermined adhesive is applied in the production and manufacturing stages of the conveyor belt.

  Also, as shown in FIG. 3B, a medium transport apparatus 200D that improves the transport reliability of paper sheets by providing a transport guide 215 having a simple shape may be used. In a normal conveyance guide, a notch portion and a slit for mounting a conveyance belt and a conveyance roller are provided, so that there is a problem that occurs when a part of a paper sheet or the like is caught. On the other hand, in the present invention, since the paper sheets are transported while being adhered to the transport belt 203, it is not necessary to provide notches or slits in the transport guide 215, and the risk of transport failure can be reduced. In addition, it is possible to simplify, downsize, and reduce the cost of the medium transport device.

  In this embodiment, as means for adhering the paper sheet P to the transport belt 203, for example, as shown in FIG. 4A, a position adjacent to the heat roller 202 around which the transport belt 203 is hung (see FIG. 4A). It is good also as a structure which provides the conveyance roller 202A installed in 4 (a) on the right side or the left side, and the conveyance roller 205A which contacts and opposes the conveyance roller 202A. In this case, the paper sheet P can be adhered to the transport belt 203 by sandwiching the paper sheet P between both sides of the transport belt 203. Further, as shown in FIG. 4B, a medium conveying apparatus 200E having a shape in which the paper sheet P enters and contacts the conveying belt 203 at a predetermined angle by the conveying guide unit 208 may be used. In this case, it is possible to cause the paper sheet P to adhere to the conveyor belt 203 by generating a predetermined pressing force. Further, a nozzle (not shown) for ejecting air may be provided near the entrance of the medium transport device, and the paper sheet P may be pressed against the transport belt 203 and adhered by the air jet force.

(2) Configuration of Medium Feeding Device Next, the medium feeding device according to the present invention will be described. FIG. 5 shows a medium feeding device using a roller having an adhesive portion on the contact surface with the medium. As shown in FIG. 5A, the medium feeding device 300A includes a bottom plate 301 on which the medium to be fed (hereinafter referred to as paper sheets P) is stacked, and the top of the paper sheets P stacked on the bottom plate 301. Pick-up roller (third roller) 302 for imparting a conveying force to the accumulated paper sheets by bringing them into contact with each other, and the paper sheets conveyed by the pickup roller 302 A feed roller 303 that imparts a transport force for transporting to the downstream side (fourth roller), a separation plate 304 provided so as to contact and face the feed roller 303 with a predetermined pressure, A pressing means 305 for pressing the paper sheets P accumulated on the bottom plate 301 against the pickup roller 302 with a predetermined pressure, and a separation plate 304 against the feed roller 303 with a predetermined pressure. It provided with pressing means 306 for attaching the.

  A temperature sensitive adhesive is applied to the entire circumference of the surface of the pickup roller 302. Further, as a heating means for the pickup roller 302, a power supply 325 and a power supply line 326 shown in FIG. 5B are provided, and in addition to a method of heating by a heater (not shown) connected to the power supply, As described in the example, a method using thermal radiation or eddy current from a light source may be used.

  The medium feeding device 300A holds a front guide 309 that guides the position of the sheets to be stacked and conveyance, a drive shaft 307 of the pickup roller 302, and is rotatable about the drive shaft 308 of the feed roller 303. An arm guide 310 for guiding the conveyance of the upper surface side of the paper sheet to be fed out, pressing means 311 for pressing the arm guide 310 against the paper sheet, a drive source 312 for driving the feed roller 303, and a pickup roller A driving power transmission mechanism 314 including a driving source 313 for driving 302, a belt and gears for transmitting the driving force from the driving source 313 to the driving shaft 308, and a drive command signal are generated for the driving source. Control means 315 for transmitting, signal transmission means 316 for transmitting a command signal, and detection means 3 for detecting the presence or absence of paper sheets to be accumulated 7, detection means 318 </ b> A and 318 </ b> B for detecting the fed paper sheets, signal transmission means 319 for transmitting a signal from the detection means to the control means 315, and dust attached to the surface of the pickup roller 302 are removed. A cleaning unit (roller) 320 and a transport roller 321 for transporting the fed paper sheet P to the downstream side of the medium feeding device are provided.

  The signal information detected by the detection means 317, 318A, 318B is transmitted to the control means 315 via the transmission means 319, and the operation control of the drive source is performed based on the signal information. The detection sensor 318 </ b> A is provided between the feed roller 303 and the conveyance roller 321, and the detection sensor 318 </ b> B is provided at a predetermined position on the downstream side of the conveyance roller 321. Further, the transport roller 321 is attached to a drive shaft 322 and is driven by a drive source 313. In addition, the drive shaft provided with these rollers is provided in the frame 323 via a bearing attached to each shaft.

  The pickup roller 302 and the feed roller 303 are respectively attached to the drive shafts 307 and 308 via one-way clutches 330 and 331, and the rotational speeds of the pickup roller and the feed roller in the direction of feeding out the paper sheets are the drive shaft 307, When the rotational speed is faster than 308, the drive shafts 307 and 308 are idled. Further, three feed rollers 303 are provided on the drive shaft 308 in the axial direction, and the center feed roller 303A is composed of a member (rubber or the like) having a high friction coefficient around the feed roller 303A. The periphery is composed of a member having a low coefficient of friction. These feed rollers 303A and 303B have the same diameter and are driven at the same peripheral speed.

  In addition, the medium feeding device according to the present invention is configured to bring the pickup roller 302 and the paper sheets into contact with each other on the downstream side (right side in FIG. 5A) as much as possible. The rear end of the paper sheet is easily deformed in the vertical direction caused by the rigidity of the paper. Therefore, a guide means for suppressing deformation of the paper sheet is provided. The contact point between the guide means and the paper sheets accumulated at the top is substantially the same as or slightly above the contact point between the pickup roller 302 and the paper sheets (that is, the space where the paper sheets are accumulated). Reverse direction). Thus, in addition to suppressing the deformation of the paper sheet, the pressure acting on the paper sheet is also received by the guide means, so that the pressure applied to the pickup roller 302 can be reduced. For this reason, it becomes possible to reduce the frictional force between paper sheets. The shape of the guide means may be a roller shape or a rod shape in addition to the plate shape.

  As shown in FIG. 5C, the separation plate 304 is provided with separation pads 304 </ b> A and 304 </ b> B at portions facing the feed roller 303. The separation pad 304B that comes into contact with the feed rollers 303B on both sides is composed of a high friction coefficient member (rubber or the like), and the separation pad 304A that is in contact with the center feed roller 303A is composed of a low friction coefficient member. With such a configuration, it is possible to reduce wear of the feed roller and the separation pad.

  Further, the arm guide 310 has a structure that is pushed downward in FIG. 5A by the pressing means 311. The lower limit position of the arm guide 310 is, for example, a positioning pin 335 attached to the arm guide 310. Is positioned by contacting a stopper 336 provided on the frame 323.

  Next, the operation of the medium feeding device 300A will be described. When a signal for starting the feeding operation is generated, electric power is supplied to the heater built in the pickup roller 302 and the pickup roller is heated. As a result, an adhesive force is developed in the adhesive applied to the surface of the pickup roller 302. Also, the bottom plate 301 is raised by the pressing means 306, and the uppermost paper sheets stacked on the bottom plate 301 come into contact with the pickup roller 302. When the pressure sensor (not shown) detects that the contact pressure between the uppermost paper sheet and the pickup roller 302 is equal to or higher than a predetermined value, the driving of the pressing means is stopped. At this time, the uppermost paper sheet is adhered to the surface of the pickup roller 302.

  Next, the drive source 313 of the pickup roller 302 and the feed roller 303 is driven by a signal from the control means 315. At this time, the peripheral speeds of the pickup roller 302 and the feed roller 303 are substantially the same. By driving the pickup roller 302, the uppermost paper sheet is conveyed to a separation unit including a feed roller 303 and a separation plate 304. The paper sheet conveyed to the separation unit receives a conveyance force due to the frictional force with the feed roller 303 and a conveyance resistance force due to the frictional force of the separation pad 304B, and the conveyance force due to the feed roller 303 is a frictional force due to the separation pad. Since it is set in advance so as to be larger, the paper sheet is transported further downstream than the separation unit, and is delivered to the transport roller 321 and transported. The circumferential speed of the conveying roller 321 is set to be substantially the same as or slightly faster than the circumferential speed of the feed roller 303.

  Even if a plurality of paper sheets are overlapped and transported to the separation unit, the transport resistance force due to the frictional force of the separation pad is set to be greater than the frictional force between the paper sheets, so the separation In the section, the uppermost paper sheet is separated and fed out.

  When the leading edge of the fed paper sheet is detected by the detection sensors 318A and 318B, the control unit 315 generates a signal for stopping the driving of the pickup roller 302 and the feed roller 303, and the driving source of each roller. 312 and 313 stop. At this time, since the pickup roller 302 and the feed roller 303 are provided on the drive shafts 307 and 308 via the one-way clutches 310 and 311, they do not hinder the conveyance of the uppermost sheet. Then, when the rear end portion of the uppermost sheet is separated from the pickup roller 302, the pickup roller 302 stops by contacting the second sheet.

  Such bill feeding operation is repeated until the detection sensor 317 detects a signal that there is no paper sheet. Further, when the contact pressure is detected to be less than a predetermined value by the contact pressure detection sensor between the pickup roller 302 and the paper sheet after several sheets are fed out, the pressing means detects the predetermined pressure. The drive is controlled so that

  In the medium feeding device according to the present invention, since the adhesive force is expressed on the surface of the pickup roller 302, the contact pressure between the pickup roller 302 and the paper sheet can be set small. Therefore, the possibility that the paper sheets are transported in an overlapping manner is reduced, and even if the paper sheets are transported in an overlapping manner, the paper sheets are separated in the separation unit as described above, so that simplification and cost reduction are achieved. A highly reliable medium feeding device can be realized.

  The medium feeding device also cleans the pickup roller 302 when a predetermined number of sheets are fed. The cleaning means in this embodiment includes a cleaning unit (roller) 340 whose surface is made of sponge or cloth material, and a roller shaft that rotatably holds the cleaning unit 340. The cleaning unit 340 includes a roller shaft. It is attached via a torque limiter. The set torque of the torque limiter is smaller than the value of the torque acting on the cleaning unit 340 when the adhesive force is developed on the cleaning adhesive surface, and is applied to the cleaning unit 340 when the adhesive force disappears on the cleaning adhesive surface. The value is set larger than the value of the acting torque.

  When the adhesive force is developed on the surface of the pickup roller 302, the cleaning unit 340 is rotated by the rotational torque generated by the adhesive force of the pickup roller 302. On the other hand, when the adhesive force disappears, the load torque of the torque limiter becomes larger than the torque due to the friction between the pickup roller and the cleaning unit 340. Therefore, the cleaning unit 340 does not rotate but slips between the cleaning roller 340 and the pickup roller. As described above, by causing a slip between the cleaning unit 340 and the pickup roller 302, dust attached to the surface of the pickup roller 302 can be cleaned. Such cleaning means can be simplified and reduced in cost, and in the sticky state, no slip occurs between the cleaning unit 340 and the pickup roller 302, so that the life of the pickup roller 302 can be extended. Is possible.

In addition to the above, the medium feeding device may adopt the following configuration.
(A) Configuration Using Gate Rollers Instead of Separating Plate 304 In the medium feeding device 300B shown in FIG. 6, gate rollers 350A and 350B are provided at portions facing the feed rollers 303A and 303B. The surface of the gate roller 350B that contacts the feed rollers 303B on both sides is made of a high friction coefficient member (such as rubber), and the surface of the gate roller 350A that contacts the center feed roller 303A is a low friction coefficient member. It consists of With such a configuration, it is possible to reduce wear of the feed roller and the separation pad. The gate rollers 350A and 350B are attached to the gate roller shaft 351 via a one-way clutch 352, and do not rotate in the sheet feeding direction but rotate in the direction opposite to the feeding direction. Has been. By adopting such a configuration, when the paper sheet is conveyed in the direction opposite to the conveying direction, the gate roller does not serve as a conveyance resistance, and the gate roller slightly changes during the feeding operation. Since the roller rotates in the direction opposite to the feeding direction, it is possible to avoid wearing a specific portion of the surface of the roller.

  In the case of the medium transport apparatus 300B shown in FIG. 6, even if a plurality of paper sheets are transported to the separation unit in a state of being overlapped, the transport resistance force due to the frictional force on the surface of the gate roller 350 is the friction between the paper sheets. It is set to be greater than the force. Therefore, the uppermost paper sheet and the second paper sheet are separated in the separation unit, and only the uppermost paper sheet is fed out.

(B) Configuration to Add Conveying Belt and Heat Roller A medium conveying apparatus 300C shown in FIG. 7 includes a conveying belt 360, a heat roller 361, and a feed roller 370 (370A, 370B) that hangs the conveying belt 360 together with the heat roller 361. ). Since the conveyance belt 360 and the heat roller 361 are the same as those in the medium conveyance device described above, detailed description thereof is omitted.

  As shown in FIG. 7B, five feed rollers 370 are attached to the drive shaft 308 of the feed roller in the axial direction, and the feed roller 370A around which the conveyor belt 360 is suspended is Is composed of a member (rubber or the like) having a high friction coefficient. Further, the feed roller 370B around which the conveyor belt 360 is not hung is composed of a member having a low coefficient of friction around the feed roller 370B. The five feed rollers 370A and 370B have substantially the same diameter and are driven at substantially the same peripheral speed. Further, as shown in FIGS. 7C and 7D, in addition to using the separation plate 304, a gate roller may be used.

(C) Configuration in which the arm guide 310 is formed in a different shape The medium transport apparatuses 300D and 300E shown in FIG. 8 can change the paper sheet by deforming the paper sheet when separating and feeding the uppermost paper sheet. It is possible to reduce the friction force acting between them as much as possible, or to shorten the time during which a large friction force acts between paper sheets as much as possible.

  Specifically, the configuration of the arm roller 310 is the contact position between the pickup roller 302 and the uppermost paper sheet shown in FIG. 8A, or the conveyance belt 360 and the uppermost paper shown in FIG. 8B. Since the contact position with the leaves is lower than the contact position between the feed roller 303 and the gate roller 350, that is, in the direction of the space in which the sheets are stored, the leading end of the accumulated sheets is deformed upward. In this configuration, a possible space S is formed. Further, the diameter of the pickup roller 302 shown in FIG. 8A or the heat roller 361 shown in FIG. Thereby, even if the uppermost paper sheet is adhered to the pickup roller 302 or the transport belt 361, the transport distance is short, and the leading edge of the paper sheet is immediately peeled and deformed upward.

  The start position of the arm guide 310 is located upstream from the leading edge position of the fed paper sheet, and is the position where the leading edge of the paper sheet that has been peeled and deformed upward contacts. As a result, the paper sheet from which the leading end is peeled can be guided to the front guide 309 and the arm guide 310 and conveyed to the separation unit. Further, the adhesive state between the pickup roller and the paper sheet is configured to continue until the leading edge of the fed paper sheet is guided between the feed roller 303 and the gate roller 350.

(3) Configuration of Media Stacking Device Next, the media stacking device according to the present invention will be described. As shown in FIG. 9A, the medium stacking apparatus 400A includes a bottom plate 401, a bottom plate driving unit 402 that moves the bottom plate 401 in the vertical direction, a conveyance belt 403 that conveys paper sheets into the hopper, A driving roller (fifth roller) 404 of the belt 403, a heat roller (sixth roller having a heating means) 405 that heats the conveying belt 403 to develop an adhesive force, and an entrance of the medium stacking device are provided. A press roller 406 that is in contact with and opposed to the conveyor belt 403, a sheet roller 407 that is provided coaxially with the press roller 406 and has a blade-like radiating portion, and side plates 408 and 409 that form a hopper for storing paper sheets, , A detection means 410 for detecting the position of the uppermost paper sheet, and a cleaning unit 440 for cleaning dust adhering to the surface of the transport belt. . In other words, the conveyor belt 403 is hung on the driving roller 403 and the heat roller 404, and a paper sheet conveying surface is coated with a temperature-sensitive adhesive, which will be described later, and when the heat roller 404 is heated. Adhesive strength is developed on the transport surface.

  The medium accumulating device 400A includes a drive source 411A directly connected to a drive shaft 412 that drives the drive roller 404, and a belt or gear for transmitting a drive force from the drive source 411A to a shaft of a sheet roller, which will be described later. A driving force transmission mechanism 413 that is configured, a control unit 414 that generates a drive command signal for the drive source 411A, a signal transmission unit 415 that transmits the command signal, and a sheet conveyed to the stacking device are detected. A detection means 416 and a signal transmission means 417 for transmitting a signal from the detection means 416 to the control means 414 are provided. The signal information detected by the detection means 416 is transmitted to the control means 414, and the operation control of the drive source 411A is performed based on the signal information.

  On the upstream side of the medium stacking apparatus, a transport roller 418 that transports paper sheets to the medium stacking apparatus is provided. The transport roller 418 is attached to the drive shaft 419 and is driven by the drive source 411B. The detection means 416 is provided at a position in the vicinity of the conveyance roller 418. In addition, the drive shaft provided with the above-mentioned roller is provided in the flame | frame which is not shown in figure through the bearing attached to each axis | shaft.

  As shown in FIG. 9B, the portion (adhesive portion) 430 to which the temperature-sensitive adhesive is applied of the conveyor belt 403 includes the circumference of the conveyor belt, the outer diameter of the drive roller 404 and the heat roller 405, and The position is determined according to the phase plate 422 attached to the drive shaft 412 to which the drive roller 404 is attached, and the position is detected by the phase detection means 423 that detects the phase of the phase plate 422. The control unit 414 is configured to be able to grasp the position information. In this case, it is desirable to use a timing belt as the conveying belt 403, and a mark is attached to a position separated by a predetermined dimension from the portion 430 to which the temperature-sensitive adhesive is applied, as shown in FIG. 9C. Further, a detecting means 431 for detecting this mark may be provided.

  An intermediate roller 424 is provided on the drive shaft 412 so as to be in contact with the sheet roller 407 and is driven in the same manner as the drive roller. The intermediate roller 424 and the boss portion of the sheet roller are separated by a predetermined distance as shown in FIG. 9D, and when the sheet roller 407 rotates, the sheet contacts the intermediate roller 424 and deforms. Rotate while. The material of the sheet provided radially from the sheet roller 407 is preferably a flexible material such as plastic or rubber.

  Next, of the operations of the medium stacking apparatus, the operation after the adhesive force is developed in the adhesive portion 430 will be described. When the paper sheet detection means 416 detects that the stacked paper sheets are being conveyed, the paper sheet detection means 416 is matched with the time when the leading edge position of the paper sheets reaches the nipping position between the conveying belt 403 and the press roller 406. The speed of the conveyor belt 403 is controlled so that the adhesive section 430 reaches a position where it comes into contact with the press roller 406. As a result, the leading end portion of the stacked paper sheets is pressed against and adhered to the adhesive portion 430 of the transport belt 403 by the press roller 406.

  After the paper sheet is adhered to the transport belt 403, the paper sheet is transported into the storage space by the adhesive force of the transport belt 403 and the clamping force of the non-adhesive portion of the transport belt 403 and the press roller 406. At this time, other than the leading edge of the paper sheet is not adhered to the transport belt 403, it tends to fall by its own weight. After the trailing edge of the paper sheet passes through the contact portion between the conveying belt 403 and the press roller 406, the trailing edge of the paper sheet is knocked down by the sheet of the sheet roller 407, and the bottom plate 401 or the bottom plate 401. It falls on the paper sheets accumulated on it.

  When the leading edge of the paper sheet reaches a point where the conveying belt 403 and the side plate 409 intersect, the leading edge of the paper sheet is peeled off from the conveying belt 403 by the side plate 409, or is accumulated on the bottom plate 401. Fall on the leaves. That is, the side plate 409 corresponds to a paper sheet peeling means adhered to the conveyance belt. In this way, the paper sheets are accumulated.

  The reliability of this stacking operation is affected by the adhesive force of the adhesive part 430 and the size of the area of the adhesive part 430 in the transport direction. That is, if the adhesive force is too large, the paper sheet cannot be peeled off from the transport belt 403, and the leading edge of the paper sheet causes a jam at the intersection of the side plate 409 and the transport belt 403. Accordingly, the adhesive strength of the adhesive portion 430 is set to such an extent that no trouble occurs at the time of peeling, and the leading end portion is not peeled off during conveyance due to the conveyance resistance force acting on the paper sheets.

  Further, when the length x in the transport direction of the adhesive portion 430 is larger than the distance y between the intersection of the side plate 409 and the transport belt 403 and the inner wall of the side plate 409, the side plate 409 is peeled off after the leading edge of the paper sheet is peeled off. There is a possibility that a stacking failure occurs such that buckling occurs due to contact with the sheet, or the leading edge of the paper sheet is conveyed downward along the side plate 409. Accordingly, the distance x in the conveyance direction of the adhesive section 430 allows the buckling of the leading end portion of the paper sheet and the conveyance downward, and the distance z in the conveyance direction at the position where the side plate 409 and the heat roller 405 are provided. It is desirable to set it as follows (particularly, approximately the same as the distance y between the intersection of the conveyor belt 403 and the inner wall of the side plate 409).

  Further, in the case where a plurality of adhesive portions 430 are provided on the conveyance belt 403, it is desirable that the interval between the adhesion portions be larger than the dimension in the conveyance direction of the stacked paper sheets. Thereby, the adhesion part which adheres subsequent paper sheets does not adhere the rear end part of the stacked paper sheets.

  When a plurality of paper sheets are stacked and the detection means 410 detects the uppermost paper sheet, the control means 414 determines that the storage space for the paper sheets has become narrow, and the driving means 402 lowers the bottom plate 401. Let The lowering of the bottom plate 401 continues until the detecting means 410 does not detect the uppermost paper sheet. Thereby, the storage space for paper sheets is secured.

  The medium stacking apparatus also includes a cleaning unit that cleans the conveyor belt 403 when a predetermined number of sheets are stacked. However, the detailed configuration is the same as the cleaning unit of the medium feeding apparatus. Therefore, the description is omitted.

(4) Adhesion Appearance and Disappearance of the Adhesive Portion Next, in order to express and disappear the adhesion of the adhesive portion, the heating, temperature maintenance, heat dissipation, and temperature lowering processing of the adhesive portion will be described.

[Heating and temperature maintenance]
When the adhesive force is generated in the adhesive part, a signal for turning on the power is transmitted from the control means to the power supply means. When the power to the heating means (heat roller) is turned on by this signal, the temperature of the heating means rises.

  When the temperature of the heating means rises to a temperature sufficient to cause the temperature-sensitive adhesive in the adhesive portion to generate adhesive force, a signal for turning off the power is sent from the control means to the power supply means. When the power to the heating unit is turned off by this signal, the temperature of the heating unit decreases.

  As a process for transmitting a signal for turning off the power to the power supply means, for example, the temperature detection means (temperature detection sensor) built in the heating means detects the temperature, and the detection result is transmitted to the control means. In the control means, there is a process of generating a signal for turning off the power to the power supply means when the temperature in the heating means has risen to a temperature sufficient to generate the adhesive force in the temperature sensitive adhesive.

  As another process, the heating means may be provided with a power supply circuit that turns off the power supply when a predetermined temperature abnormality occurs, or the power supply is preliminarily determined based on the evaluation result of the time required to rise to the predetermined temperature. Processing may be such that the power is turned off after a predetermined time has elapsed since turning on.

  After the power is turned off, for example, when the temperature of the heating means decreases and the adhesive force in the adhesive part may be lost, the power of the heating means is turned on again by turning on the power to the heating means. The temperature rises and the adhesive strength is maintained. Even in the determination of the possibility of loss of adhesive strength, it is necessary to use the temperature detection sensor or turn on the power again after a predetermined time has elapsed after turning off the power based on the preliminary evaluation result of the temperature drop characteristic of the heating means. In this case, a control flow for turning on the power of the heating means may be used.

[Heat dissipation, temperature drop]
When the adhesive force disappears in the adhesive part, a signal for turning off the power is transmitted from the control means to the power supply means. When the power to the heating unit is turned off by this signal, the temperature of the heating unit decreases.

  Further, in the case of an apparatus provided with a temperature lowering means for lowering the temperature, first, when the power supply of the heating means is ON, a signal for turning off the power supply is transmitted from the control means to the power supply means. This signal turns off the power to the heating means. Thereafter, a signal for turning on the power of the temperature lowering means is transmitted from the control means to the power supply means. When the power to the temperature lowering means is turned on by this signal, the temperature of the heating means decreases, and the temperature of the adhesive portion becomes lower than the glass transition temperature (Tg) of the adhesive, thereby The adhesive strength disappears.

(5) Temperature sensitive adhesive Next, a temperature sensitive adhesive is demonstrated. A temperature-sensitive adhesive is a pressure-sensitive adhesive crosslinked with a side-chain crystalline polymer as a component, and exhibits an adhesive force when the temperature is set to an adhesion development temperature (Tm) or higher, and heating is stopped. The adhesive strength of the adhesive portion is lost by allowing the temperature of the adhesive portion to be lower than the adhesive development temperature (Tm) and lower than the glass transition temperature (Tg) by natural cooling or temperature lowering means.

  By using an adhesive device to which the temperature-sensitive adhesive having the above-described characteristics is applied, it is possible to easily remove dust and the like adhering to the adhesive part when the adhesive force is generated when the adhesive force disappears. Specifically, after the temperature of the adhesive part is set to a temperature lower than the adhesive development temperature (Tm) and lower than the glass transition temperature (Tg), a simple cleaning operation such as wiping the adhesive part with a cloth or a brush is performed. It is possible to prevent the adhesive force from being lowered when the adhesive force is expressed and to repeatedly perform the adhesive operation without exchanging the adhesive part. In this case, it is essential for the heating means to be able to make the temperature of the adhesive part higher than the melting point (Tm, that is, the adhesive force expression temperature) of the adhesive.

  More preferably, the melting point (Tm) is higher than the glass transition temperature (Tg) of the adhesive, and the difference between the melting point (Tm) and the glass transition temperature (Tg) of the adhesive is small (about 5 Kelvin), Furthermore, it is an adhesive having a glass transition temperature (Tg) of about room temperature (about 15 to 25 degrees Celsius). Thereby, in the state where the adhesive strength has disappeared, it is easy to remove the adhering matter (dust or foreign matter that can adhere to the adhesive) attached to the adhesive. By having such characteristics, it is easy to remove dust and the like attached to the adhesive portion 1 when the adhesive force is generated, and less power is required for heating, and further, until the adhesive force is expressed and the adhesive force disappears. It is possible to shorten the time.

  Moreover, the adhesive whose glass transition temperature (Tg) is less than 0 degreeC may be sufficient. In this case, it is essential that a temperature lowering unit is provided in the adhesive device, and the temperature lowering unit is capable of making the temperature of the adhesive part lower than the glass transition temperature (Tg) of the adhesive.

  By having an adhesive part coated with a temperature-sensitive adhesive having the above-mentioned characteristics, a heating means, and a cooling means, it becomes possible to easily remove dust and the like adhering to the adhesive part when an adhesive force is generated. After the number of operations, the temperature of the adhesive part is set to a temperature not higher than the adhesive development temperature (Tm) and not higher than the glass transition temperature (Tg) so that the adhesive force of the adhesive part disappears, and the adhesive part is wiped off with a cloth or a brush, for example. By performing such simple cleaning, it is possible to prevent the adhesive force from decreasing when the adhesive force is expressed, and to repeatedly perform the adhesive operation without exchanging the adhesive part. In this case, it is also possible to suppress the cost of the temperature sensitive adhesive.

  Below, the synthesis example of the crosslinkable adhesive material (adhesive prepolymer) used for the adhesive mentioned above, the Example of an adhesive, and the state of the adhesive force in each Example are shown. Moreover, FIG. 10 is a figure which showed the characteristic of the adhesive in each Example.

[Synthesis Example 1] Synthesis Example of Acrylic Copolymer Prepolymer of Side-Chain Crystalline Polymer 4.9 g of octadecyl acrylate (Aldrich), 0.1 g of hydroxyl ethyl acrylate (Kanto Chemical) as a cross-linking monomer, and a thermal polymerization initiator A certain 2,2-azobisisobutyronitrile 0.02 g (Tokyo Kasei) was put into a 100 cc eggplant type flask, and 10 cc of toluene was added. The flask was brought to 60 ° C. under a nitrogen atmosphere and stirred for 10 hours. After returning to room temperature and reprecipitation with methanol, the product was filtered off and dried at room temperature. From the measurement by GPC, the weight average molecular weight of the obtained acrylic copolymer prepolymer was 230,000. This acrylic copolymer prepolymer melting point (Tm) is 50 ° C. from thermal analysis by TA Instruments Q200 and observation with a Nikon polarizing microscope.

[Synthesis Example 2] Synthesis Example of Acrylic Copolymer Prepolymer of Amorphous Polymer 2.5 g of methyl acrylate (Tokyo Kasei), 2.5 g of methyl methacrylate (Tokyo Kasei), and hydroxylethyl acrylate as a cross-linking monomer. 1 g (Kanto Chemical Co., Ltd.) and 0.05 g of 2,2-azobisisobutyronitrile (manufactured by Tokyo Chemical Industry), which is a thermal photopolymerization initiator, were placed in a 100 cc eggplant type flask, and 10 cc of toluene was added. The flask was brought to 60 ° C. under a nitrogen atmosphere and stirred for 10 hours. After returning to room temperature and reprecipitation with methanol, the product was filtered off and dried at room temperature. From the measurement by GPC, the obtained acrylic copolymer prepolymer had a weight average molecular weight of 310,000. From the thermal analysis by TA Instruments Q200, the glass transition temperature (Tg) of this acrylic copolymer prepolymer is 45 ° C.

[Synthesis Example 3] Synthesis Example of Acrylic Copolymer Prepolymer of Noncrystalline Polymer 4.9 g of methyl acrylate (Tokyo Kasei), 0.1 g of methyl methacrylate (Tokyo Kasei), and hydroxylethyl acrylate as a cross-linking unit monomer of 0.8 g. 1 g (Kanto Chemical Co., Ltd.) and 0.05 g of 2,2-azobisisobutyronitrile (manufactured by Tokyo Chemical Industry), which is a thermal photopolymerization initiator, were placed in a 100 cc eggplant type flask, and 10 cc of toluene was added. The flask was brought to 60 ° C. under a nitrogen atmosphere and stirred for 10 hours. After returning to room temperature and reprecipitation with methanol, the product was filtered off and dried at room temperature. From the measurement by GPC, the obtained acrylic copolymer prepolymer had a weight average molecular weight of 310,000. From the thermal analysis by TA Instruments Q200, the glass transition temperature (Tg) of this acrylic copolymer prepolymer is 0 ° C.

[Synthesis Example 4] Synthesis Example of Acrylic Copolymer Prepolymer Octadecyl acrylate 2,5 g (Aldrich), Methyl acrylate 2.5 g (Tokyo Kasei), Hydroxyethyl acrylate 0.1 g (Kanto Chemical) as a cross-linking monomer, and 0.02 g of 2,2-azobisisobutyronitrile (Tokyo Kasei) as a thermal polymerization initiator was placed in a 100 cc eggplant type flask, and 10 cc of toluene was added. The flask was brought to 60 ° C. under a nitrogen atmosphere and stirred for 10 hours. After returning to room temperature and reprecipitation with methanol, the product was filtered off and dried at room temperature. From the measurement by GPC, the obtained acrylic copolymer prepolymer had a weight average molecular weight of 490,000. From the thermal analysis and the polarization microscope observation, the melting point (Tm) of this acrylic copolymer prepolymer is 50 ° C., and the glass transition temperature (Tg) is 10 ° C.

[Example 1]
4.0 g of the side chain crystalline polymer obtained in Synthesis Example 1 and 1.0 g of the amorphous polymer obtained in Synthesis Example 2, and 0.4 g of diphenylmethane-4,4′-diisocyanate when used as a crosslinking agent (Tokyo) Kasei) was dissolved in 20 cc of tetrahydrofuran (Wako Pure Chemical Industries, Ltd.). This solution was applied onto a polyimide film having a thickness of 50 μm and a size of 10 cm × 10 cm, and heated to 120 ° C. to obtain an adhesive sheet. From the thermal analysis and polarization microscope observation, the pressure-sensitive adhesive sheet has a melting point (Tm) of 50 ° C. and a glass transition temperature (Tg) of 45 ° C.

  Moreover, the adhesive sheet of width 10mm was cut out from this adhesive sheet, and adhesive force evaluation was implemented. The adhesive strength was evaluated using a force gauge measured in Japan. A sample of the adhesive sheet was placed on a hot plate, and a round metallic attachment was attached to the force gauge side for evaluation. The adhesive strength at 20 ° C. and 65 ° C. at the time of preparing the adhesive sheet was 0.0 N / 25 mm and 0.9 N / 25 mm, respectively, and it was confirmed that the adhesive sheet was able to control the adhesive strength by heat treatment. Next, baby powder was adhered to this adhesive sheet, and the adhesive strength was measured. The adhesive strength at 65 ° C. at the time of powder adhesion was 0.0 N / 25 mm, and the observation results show that the adhesive strength is inhibited by the adhesion of baby powder. Due to the adhesion of the baby powder, the powder was removed from the adhesive sheet with a nylon cloth at 20 ° C. It was found that the attached baby powder can be removed by this cleaning operation. The adhesive strength at 20 ° C. and 65 ° C. of the adhesive sheet after cleaning was 0.0 N / 25 mm and 0.8 N / 25 mm, respectively, and it was confirmed that the adhesive sheet was able to recover the adhesive strength by a cleaning operation at room temperature. .

[Example 2]
4.0 g of the side chain crystalline polymer obtained in Synthesis Example 1 and 1.0 g of the amorphous polymer obtained in Synthesis Example 3, and 0.4 g of diphenylmethane-4,4′-diisocyanate as a crosslinking agent (Tokyo) Kasei) was dissolved in 20 cc of tetrahydrofuran (Wako Pure Chemical Industries, Ltd.). This solution was applied onto a polyimide film having a thickness of 50 μm and a size of 10 cm × 10 cm, and heated to 120 ° C. to obtain an adhesive sheet. From the thermal analysis and polarization microscope observation, the pressure-sensitive adhesive sheet has a melting point (Tm) of 50 ° C. and a glass transition temperature (Tg) of 0 ° C.

  Moreover, the adhesive sheet of width 10mm was cut out from this adhesive sheet, and adhesive force evaluation was implemented. The adhesive strength was evaluated using a force gauge measured in Japan. A sample of the adhesive sheet was placed on a hot plate, and a round metallic attachment was attached to the force gauge side for evaluation. The adhesive strength at 20 ° C. and 65 ° C. at the time of preparing the adhesive sheet was 0.0 N / 25 mm and 1.2 N / 25 mm, respectively, and it was confirmed that the adhesive sheet was able to control the adhesive strength by heat treatment. Next, baby powder was adhered to this adhesive sheet, and the adhesive strength was measured. The adhesive strength at 65 ° C. at the time of powder adhesion was 0.0 N / 25 mm, and the observation results show that the adhesive strength is inhibited by the adhesion of baby powder. The powder was removed with a nylon cloth at −10 ° C. with respect to the adhesive sheet by the attachment of the baby powder. It was found that the attached baby powder can be removed by this cleaning operation. The pressure-sensitive adhesive strength of the cleaned pressure-sensitive adhesive sheet at 20 ° C. and 65 ° C. was 0.0 N / 25 mm and 1.1 N / 25 mm, respectively, and it was confirmed that the pressure-sensitive adhesive sheet can be recovered by a cleaning operation at room temperature. .

[Example 3]
When 4.0 g of the side chain crystalline polymer obtained in Synthesis Example 4 and a crosslinking agent were used, 0.4 g of diphenylmethane-4,4′-diisocyanate (Tokyo Kasei) was dissolved in 20 cc of tetrahydrofuran (Wako Pure Chemical Industries). This solution was applied onto a polyimide film having a thickness of 50 μm and a size of 10 cm × 10 cm, and heated to 120 ° C. to obtain an adhesive sheet. From the thermal analysis and polarization microscope observation, the pressure-sensitive adhesive sheet has a melting point (Tm) of 50 ° C. and a glass transition temperature (Tg) of 10 ° C.

  Moreover, the adhesive sheet of width 10mm was cut out from this adhesive sheet, and adhesive force evaluation was implemented. The adhesive strength was evaluated using a force gauge measured in Japan. A sample of the adhesive sheet was placed on a hot plate, and a round metallic attachment was attached to the force gauge side for evaluation. The adhesive strength at 20 ° C. and 65 ° C. at the time of preparing the adhesive sheet was 0.0 N / 25 mm and 1.0 N / 25 mm, respectively, and it was confirmed that the adhesive sheet was able to control the adhesive strength by heat treatment. Next, baby powder was adhered to this adhesive sheet, and the adhesive strength was measured. The adhesive strength at 65 ° C. at the time of powder adhesion was 0.0 N / 25 mm, and the observation results show that the adhesive strength is inhibited by the adhesion of baby powder. The powder was removed with a nylon cloth at −10 ° C. with respect to the adhesive sheet by the attachment of the baby powder. It was found that the attached baby powder can be removed by this cleaning operation. The adhesive strength at 20 ° C. and 65 ° C. of the adhesive sheet after cleaning was 0.0 N / 25 mm and 0.9 N / 25 mm, respectively, and it was confirmed that the adhesive sheet was able to recover the adhesive strength by a cleaning operation at room temperature. .

[Comparative Example 1]
4.0 g of the side chain crystalline polymer obtained in Synthesis Example 1 and 1.0 g of the amorphous polymer obtained in Synthesis Example 3, and 0.4 g of diphenylmethane-4,4′-diisocyanate as a crosslinking agent (Tokyo) Kasei) was dissolved in 20 cc of tetrahydrofuran (Wako Pure Chemical Industries, Ltd.). This solution was applied onto a polyimide film having a thickness of 50 μm and a size of 10 cm × 10 cm, and heated to 120 ° C. to obtain an adhesive sheet. From the thermal analysis and polarization microscope observation, the pressure-sensitive adhesive sheet has a melting point (Tm) of 50 ° C. and a glass transition temperature (Tg) of 0 ° C.

  Moreover, the adhesive sheet of width 10mm was cut out from this adhesive sheet, and adhesive force evaluation was implemented. The adhesive strength was evaluated using a force gauge measured in Japan. A sample of the adhesive sheet was placed on a hot plate, and a round metallic attachment was attached to the force gauge side for evaluation. The adhesive strength at 20 ° C. and 65 ° C. at the time of preparing the adhesive sheet was 0.0 N / 25 mm and 1.2 N / 25 mm, respectively, and it was confirmed that the adhesive sheet was able to control the adhesive strength by heat treatment. Next, baby powder was adhered to this adhesive sheet, and the adhesive strength was measured. The adhesive strength at 65 ° C. at the time of powder adhesion was 0.0 N / 25 mm, and the observation results show that the adhesive strength is inhibited by the adhesion of baby powder. Due to the adhesion of the baby powder, the powder was removed from the adhesive sheet with a nylon cloth at 20 ° C. Even if this cleaning operation was performed, the attached baby powder could not be removed. The adhesive strength at 20 ° C. and 65 ° C. of the pressure-sensitive adhesive sheet after cleaning was 0.0 N / 25 mm and 0.0 N / 25 mm, respectively, and it was confirmed that the pressure-sensitive adhesive sheet could not be recovered by a cleaning operation at room temperature. .

[Comparative Example 2]
When 4.0 g of the side chain crystalline polymer obtained in Synthesis Example 4 and a crosslinking agent were used, 0.4 g of diphenylmethane-4,4′-diisocyanate (Tokyo Kasei) was dissolved in 20 cc of tetrahydrofuran (Wako Pure Chemical Industries). This solution was applied onto a polyimide film having a thickness of 50 μm and a size of 10 cm × 10 cm, and heated to 120 ° C. to obtain an adhesive sheet. From the thermal analysis and polarization microscope observation, the pressure-sensitive adhesive sheet has a melting point (Tm) of 50 ° C. and a glass transition temperature (Tg) of 10 ° C.

  Moreover, the adhesive sheet of width 10mm was cut out from this adhesive sheet, and adhesive force evaluation was implemented. The adhesive strength was evaluated using a force gauge measured in Japan. A sample of the adhesive sheet was placed on a hot plate, and a round metallic attachment was attached to the force gauge side for evaluation. The adhesive strength at 20 ° C. and 65 ° C. at the time of preparing the adhesive sheet was 0.0 N / 25 mm and 1.0 N / 25 mm, respectively, and it was confirmed that the adhesive sheet was able to control the adhesive strength by heat treatment. Next, baby powder was adhered to this adhesive sheet, and the adhesive strength was measured. The adhesive strength at 65 ° C. at the time of powder adhesion was 0.0 N / 25 mm, and the observation results show that the adhesive strength is inhibited by the adhesion of baby powder. Due to the adhesion of the baby powder, the powder was removed from the adhesive sheet with a nylon cloth at 20 ° C. Even if this cleaning operation was performed, the attached baby powder could not be removed. The adhesive strength at 20 ° C. and 65 ° C. of the pressure-sensitive adhesive sheet after cleaning was 0.0 N / 25 mm and 0.0 N / 25 mm, respectively, and it was confirmed that the pressure-sensitive adhesive sheet could not be recovered by a cleaning operation at room temperature. .

  In the examples and comparative examples described above, baby powder is used as an example of the deposit. However, other dust particles other than baby powder and foreign matters having a size that can be adhered to the adhesive sheet may be used.

(6) Other Cleaning Means FIG. 11 is a diagram showing another cleaning means. The cleaning means 40A shown in FIG. 11A includes a cleaning unit (brush) 41A that contacts the roller surface and the adhesive portion of the belt surface, and a solenoid as a drive source for retracting the cleaning unit 41A from the roller surface and the belt surface. 42A and a link mechanism 43A. In the cleaning unit 40A, the link mechanism 43A is driven by the solenoid 42A, so that the cleaning unit 41 attached to the end of the link mechanism 43A contacts the roller surface or the belt surface with a predetermined pressure, and the non-adhesive roller or belt To remove dust and the like adhering to the adhesive portion.

  Further, it may be a roller type cleaning means as shown in FIG. The cleaning unit 40B includes a cleaning unit (roller) 41B that contacts the adhesive unit, a solenoid 42B as a drive source for retracting the cleaning unit 41B from the adhesive unit, a link mechanism 43B, and a drive source that drives the cleaning unit 41B. , A timing gear 46 attached to the motor shaft that transmits the driving force of the motor 45 to the cleaning unit 41B, a timing belt 47, and a timing gear 48 attached to the cleaning roller shaft. In the cleaning unit 40B, the link mechanism 43B is driven by the solenoid 42B, so that the cleaning unit 41B attached to the end of the link mechanism 43B contacts the roller surface or the belt surface with a predetermined pressure, and the non-adhesive roller or belt To remove dust and the like adhering to the adhesive portion.

  As described above, according to the present invention, cleaning after dust or dust adheres to the adhesive portion can be easily performed, and the adhesive strength of the adhesive portion after cleaning can be restored to the initial level of adhesive force, and repeated adhesive operations can be performed. An adhesive device and a cleaning method that can be performed can be provided. Further, by using the above-described adhesive device, it is possible to handle a wide variety of articles, and it is possible to realize a simple article handling mechanism that can be downsized.

200A to E: medium transport device, 201: drive roller, 202: heat roller, 203: transport belt, 204: transport guide, 205: transport roller, 212, 213: transport guide, 300A to E: medium feeding device, 301: Bottom plate, 302: Pickup roller, 303: Feed roller, 304: Separation plate, 312: Driving source, 325: Heater power supply, 340: Cleaning roller, 400A to B: Medium stacking device, 401: Bottom plate, 402: Driving means for bottom plate 403: Conveying belt 404: Drive roller 405: Heat roller 406: Press roller 414: Control means

Claims (11)

A first roller, a second roller provided with a heating means, a belt provided with an adhesive portion that is hung on the first roller and the second roller and coated with a temperature-sensitive adhesive; A belt conveying means, and a medium conveying device comprising:
The heating means heats the thermosensitive adhesive to a temperature equal to or higher than the melting point of the thermosensitive adhesive,
The medium transporting apparatus according to claim 1, wherein the cleaning unit contacts the adhesive portion at a temperature lower than a melting point and lower than a glass transition temperature of the temperature-sensitive adhesive, and removes an adhering matter attached to the adhesive portion. The medium carrying device according to claim 1,
The difference between the melting point and the glass transition temperature is about 5 Kelvin. The medium carrying device according to claim 1,
The belt is provided with the adhesive portion and a predetermined mark at regular intervals,
Furthermore, the mark detecting means is provided,
The medium conveying apparatus according to claim 1, wherein the belt driving speed is controlled by the detecting means based on the timing when the mark is detected. The medium carrying device according to claim 1,
A medium conveying apparatus, wherein a conveying surface of the medium formed by the belt is bent in a convex shape. A third roller that includes a heating unit and a pressure-sensitive adhesive portion coated with a temperature-sensitive pressure-sensitive adhesive, and applies a conveying force to the accumulated medium, and a medium conveyed by the third roller A medium feeding device comprising: a fourth roller that applies a conveying force to the second roller; and a cleaning means for the third roller,
The heating means heats the thermosensitive adhesive to a temperature equal to or higher than the melting point of the thermosensitive adhesive,
The medium feeding device according to claim 1, wherein the cleaning means contacts the adhesive portion at a temperature lower than the melting point and lower than the glass transition temperature of the temperature-sensitive adhesive, and removes deposits attached to the adhesive portion. The medium feeding device according to claim 5, wherein
The difference between the melting point and the glass transition temperature is about 5 Kelvin. The medium feeding device according to claim 5, wherein
A guide for guiding the medium to be fed out;
The medium feeding device according to claim 1, wherein the guide forms a space in which a front end portion of the accumulated medium is deformable. A third roller that includes a heating unit and that imparts a conveying force to the accumulated medium; a fourth roller that imparts a conveying force to the medium conveyed by the third roller; A medium feeding device comprising: a belt provided with an adhesive portion that is hung on a third roller and the fourth roller and applied with a temperature-sensitive adhesive; and a cleaning means for the belt,
The heating means heats the thermosensitive adhesive to a temperature equal to or higher than the melting point of the thermosensitive adhesive,
The medium feeding device according to claim 1, wherein the cleaning means contacts the adhesive portion at a temperature lower than the melting point and lower than the glass transition temperature of the temperature-sensitive adhesive, and removes deposits attached to the adhesive portion. It is suspended by a fifth roller having heating means, a sixth roller for applying a conveying force to the medium conveyed by the fifth roller, and the fifth roller and the sixth roller. A medium accumulating apparatus comprising: a belt including an adhesive portion to which a temperature-sensitive adhesive is applied; a peeling means for peeling the medium adhered to the belt; and a cleaning means for the belt.
The heating means heats the thermosensitive adhesive to a temperature equal to or higher than the melting point of the thermosensitive adhesive,
The medium collecting apparatus according to claim 1, wherein the cleaning means contacts the adhesive portion at a temperature lower than the melting point and lower than the glass transition temperature of the temperature-sensitive adhesive, and removes the adhering matter attached to the adhesive portion. The medium storage device according to claim 9, comprising:
The difference between the melting point and the glass transition temperature is about 5 Kelvin. The medium storage device according to claim 9, comprising:
The length of the said adhesion part is below the distance of the said peeling means and the position in which the said 5th roller is provided, The media stacking apparatus characterized by the above-mentioned.

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