JP5696616B2 - Recording medium transport mechanism and recording medium processing apparatus - Google Patents

Description

  The present invention relates to a recording medium transport mechanism and a recording medium processing apparatus.

  As a transport mechanism that transports a recording medium such as a recording sheet or a passbook, a transport mechanism that sandwiches and transports the recording medium with a pair of transport rollers is widely used. In such a recording medium transport mechanism, the pair of rollers opens when the front end of the recording medium opens before the end of the recording medium reaches the nipping section of the roller, and the front end of the recording medium passes through the nipping section of the roller. There is known a sheet conveying apparatus that holds the sheet (Patent Document 1).

  However, when a narrow recording medium is transported, the rotation axis of the roller is inclined due to a step between a portion where the recording medium is sandwiched and a portion where the recording medium is not sandwiched. For this reason, there is a possibility that the conveyance failure may occur because the recording medium cannot be clamped evenly. Similarly, when the thickness differs in the width direction of the recording medium, similarly, the thick portion and the thin portion cannot be sandwiched evenly, and there is a possibility that a conveyance failure may occur.

Japanese Patent Laid-Open No. 11-11734

  In consideration of the above-described facts, an object of the present invention is to provide a recording medium transport mechanism and a recording medium processing apparatus that sandwich and transport a recording medium evenly regardless of the size and thickness of the recording medium to be transported.

The recording medium conveyance mechanism according to claim 1, a frame provided so as to be movable in a vertical direction across a conveyance path of the recording medium, a plurality of moving rollers arranged in a line along the frame, and the movement A fixed roller that is disposed below the roller and sandwiches and conveys the recording medium together with the moving roller, an urging unit that urges the rotating shaft of the moving roller toward the fixed roller, and the rotating shafts are tiltably connected. and a joint member for transmitting the driving force, the formed in the frame, possess a support arm capable of supporting the joint member, a moving means for moving said frame vertically, the said coupling member is a rod a connecting member, are formed at both ends of the connecting member, and a rotary shaft and a joint portion which tilting is rotatably connected a mobile roller, the support arm is movably supports the joint portion in the vertical direction And wherein the door.

  In the recording medium transport mechanism according to the first aspect, the gap can be formed between the moving roller and the fixed roller by moving the frame upward by the moving means and lifting the joint member by the support arm. For this reason, it is not necessary for the leading end portion of the recording medium to be conveyed to push up the moving roller, and it is possible to prevent the recording medium from being bent or damaged.

Moreover, the rotating shaft of the moving roller is connected to be tiltable by a joint member. For this reason, when a narrow recording medium is conveyed, even if the moving roller that sandwiches the recording medium and the moving roller that does not sandwich the recording medium have different heights, the movement of the rotating shaft urged by the urging means is performed. The recording medium can be evenly sandwiched between the fixed roller and the roller without tilting. Furthermore, even recording media having different thicknesses in the width direction can be nipped and conveyed.
Furthermore, since the support arm lifts the joint portions at both ends of the connecting member, it can be lifted stably without tilting the rotating shaft of the moving roller. As a result, the gap between the moving roller and the fixed roller can be lifted while being kept constant.

According to a second aspect of the present invention , in the recording medium transport mechanism, the moving unit is a cam that rotates in contact with the frame.

In the recording medium transport mechanism according to the second aspect , since the frame is moved up and down by rotating the cam, the frame can be moved with a simple structure.

The recording medium conveying mechanism according to claim 3 is provided at one end portion of a rotating shaft of the fixed roller, and a driving gear that drives the fixed roller, a driven gear that meshes with the driving gear and transmits a driving force, A support portion that rotatably supports the rotation shaft of the driven gear and the rotation shaft of the drive gear, and the rotation shaft of the driven gear and the rotation shaft of the moving roller are connected by the joint member. It is characterized by that.

In the recording medium transport mechanism according to claim 3 , since the joint member tilts even when the support arm lifts the joint member and a gap is formed between the moving roller and the fixed roller, the drive gear and the driven gear And the driving force can be transmitted to the moving roller. In the present invention, both the moving roller and the fixed roller are driven in order to improve the conveyance force of the recording medium, but gear skipping can be suppressed as compared with a configuration in which the driven gear is separated from the driving gear.

The recording medium processing apparatus according to claim 4 is provided on a rotation shaft of the rubber-made moving roller, and is provided with an annular roller portion made of resin, and an elasticity provided between the roller portion and the rotation shaft. and a body, and the moving roller than the large diameter of the upper alignment roller, provided on a rotating shaft of the rubber of the fixing roller, and the fixed roller and the movable roller in contact with the upper portion aligning roller A gap is formed between the lower alignment roller made of resin, and the lower alignment roller is provided downstream of the upper alignment roller and the lower alignment roller in the recording medium conveyance direction, and opens and closes the recording medium conveyance path. And a shutter.

In the recording medium transport mechanism according to claim 4 , the inserted recording medium is sandwiched and transported to the shutter by the resin upper alignment roller and the lower alignment roller, whereby the recording medium feed is stopped, and the upper alignment roller The recording medium is slid between the roller and the lower alignment roller so that the recording medium is aligned in a direction perpendicular to the transport direction.

  When the cam is rotated to lower the frame, the upper alignment roller is pressed against the lower alignment roller by the urging force applied to the rotation shaft of the moving roller, and the elastic body of the upper alignment roller is elastically deformed. For this reason, the moving roller having a smaller diameter than the upper alignment roller is brought into contact with the fixed roller, and the recording medium is nipped and conveyed by the moving roller and the fixed roller as rubber rollers.

According to a fifth aspect of the present invention, there is provided a recording medium processing device according to the fourth aspect, and a first recording medium conveying mechanism and a first medium that is provided upstream of the moving roller and the fixed roller in the conveying direction of the recording medium, A plurality of detection means, a second detection means for detecting a recording medium to be conveyed, provided in a direction orthogonal to the conveyance direction between the moving roller, the fixed roller, and the shutter, and a conveyance direction from the shutter And a printing section provided on the downstream side.

In the recording medium processing apparatus according to the fifth aspect , since the drive gear is driven after the first detection means detects the recording medium, the apparatus can be operated with power saving. In addition, after the conveyance of the recording medium is stopped by the shutter, the shutter is opened after the second detection unit detects that the recording medium is aligned in the direction orthogonal to the conveyance direction. For this reason, the recording medium is conveyed to the printing unit in a state of being aligned in a direction orthogonal to the conveyance direction. Thereby, generation | occurrence | production of printing defect can be suppressed.

  Since the present invention has the above-described configuration, it is possible to provide a recording medium transport mechanism and a recording medium processing apparatus that sandwich and transport a recording medium evenly regardless of the size and thickness of the transporting recording medium.

1 is a schematic top view of a recording medium processing apparatus including a recording medium conveyance mechanism according to a first embodiment. FIG. 3 is a schematic side view of a recording medium transport mechanism according to the first embodiment. FIG. 3 is a front view of the recording medium transport mechanism according to the first embodiment. FIG. 3 is an enlarged perspective view illustrating a relationship between a rotating shaft and a socket of the recording medium transport mechanism according to the first embodiment. FIG. 3 is an enlarged perspective view for explaining a joint of the recording medium transport mechanism according to the first embodiment. FIG. 4A is an enlarged side view of a main part when the cam of the recording medium transport mechanism according to the first embodiment is in a standby position, FIG. FIG. 4 is an enlarged side view of a main part in a state of a transfer position. FIG. 7 is an enlarged front view of a main part of the recording medium transport mechanism according to the first embodiment in a state of a standby position shown in FIG. FIG. 7 is an enlarged front view of a main part of the recording medium conveyance mechanism according to the first embodiment in a state where the cam is in the insertion position of FIG. FIG. 7 is an enlarged front view of a main part of the recording medium transport mechanism according to the first embodiment in a state of a transport position shown in FIG. 3 is a flowchart for explaining the movement of the recording medium processing apparatus and the recording medium according to the first embodiment. (A) is a principal part enlarged view which shows the state by which the recording medium was inserted into the recording medium processing apparatus which concerns on 1st Embodiment diagonally, (B) is a principal part enlarged view which shows the state with the attitude | position of the recording medium ready. is there. It is a front view at the time of recording medium conveyance of the recording medium conveyance mechanism which concerns on 1st Embodiment. FIG. 10 is a front view of a recording medium transport mechanism according to a second embodiment.

  A configuration of a recording medium processing apparatus including the recording medium conveyance mechanism according to the first embodiment will be described with reference to the drawings.

  As shown in FIGS. 1 and 2, an insertion port 12 into which a recording medium P such as a passbook is inserted into the casing 11 is provided on the front surface of the casing 11 of the recording medium processing apparatus 10. P is inserted in the direction of arrow A from the insertion port 12 into the conveyance path 14 of the recording medium processing apparatus 10.

  Side frames 16 </ b> L and 16 </ b> R are provided on both sides of the conveyance path 14 along the conveyance direction (direction of arrow A) of the recording medium P. Further, a recording medium transport mechanism 18 described later is disposed between the side frame 16L and the side frame 16R.

  An optical sensor 70 as a first detection unit is provided between the insertion opening 12 and the recording medium transport mechanism 18. Further, an optical sensor 72 as a second detection unit is provided on the downstream side in the transport direction from the recording medium transport mechanism 18. A plurality of optical sensors 70 and 72 are provided at equal intervals in the width direction of the transport path 14, and the recording medium P blocks a beam irradiated from the lower side to the upper side of the transport path 14 to output a signal. It is configured to transmit. Further, more optical sensors 72 are provided than the optical sensor 70, and the posture of the recording medium P can be detected as will be described later.

  A shutter 20 is provided on the downstream side in the transport direction from the optical sensor 72. The shutter 20 is a plate material extending in the width direction of the conveyance path 14, is erected so as to be movable in the vertical direction, and blocks the conveyance path 14. A roller unit 22 that sandwiches and conveys the recording medium P is provided downstream of the shutter 20 in the conveyance direction. The roller unit 22 includes a transport roller 24 that sandwiches and transports the recording medium P from above and below, and a rotation shaft 26 that is fixed to the transport roller 24 and extends in a direction orthogonal to the transport direction. Further, both ends of the rotating shaft 26 are rotatably supported by the side frames 16R and 16L, and the rotational force is transmitted by the motor 29.

  A print head 25 that performs a printing process on a recording medium is provided downstream of the roller unit 22 in the transport direction. The recording medium P sandwiched between the roller units 22 is conveyed to the print area of the print head 25 and stopped. Here, information necessary for the recording medium P is printed by the print head 25 and sent out to the roller unit 22 on the downstream side in the transport direction from the print head 25.

  As shown in FIGS. 1 to 3, the recording medium transport mechanism 18 is provided with a lower transport roller 28 as a fixed roller on a rotation shaft 34 that is rotatably supported by the side frames 16R and 16L. An upper transport roller 27 as a moving roller is provided on the rotating shaft 36 above the lower transport roller 28. The upper conveyance roller 27 and the lower conveyance roller 28 are rubber rollers, and six each are provided in the width direction of the conveyance path 14. In the state of the standby position in FIG. 3, a gap S <b> 1 is formed between the upper transport roller 27 and the lower transport roller 28.

  In addition, a lower alignment roller 32 formed of a resin such as plastic is coaxially provided on the rotating shaft 34 of the lower transport roller 28 adjacent to the lower transport roller 28. The lower conveyance roller 28 and the lower alignment roller 32 have the same diameter.

  One end of the rotating shaft 34 of the lower conveying roller 28 and the lower aligning roller 32 is connected to the rotating shaft of the conveying motor 33. Further, a driving gear 35 that transmits driving force is provided on the rotating shaft 34 in the vicinity of the side frame 16R.

  A driven gear 37 that meshes with the drive gear 35 is provided above the drive gear 35. One end of the rotating shaft 39 of the driven gear 37 is rotatably supported by the side frame 16R, and a joint 50 described later is formed at the other end of the rotating shaft 39.

  Above the lower alignment roller 32, an upper alignment roller 30 is provided coaxially with the rotation shaft 36 of the upper transport roller 27. As shown in FIG. 4, the upper alignment roller 30 has a larger diameter than the upper conveying roller 27, and the outer peripheral portion that comes into contact with the recording medium P is composed of a resin annular member 31 such as plastic. In addition, the shaft portion 23 of the upper alignment roller 30 is fixed to the rotation shaft 36. A plurality of rubber plates 47 curved in the radial direction extend between the shaft portion 23 and the resin annular member 31. The inner peripheral portion of the resin annular member 31 is supported at the tip of the rubber plate 47. For this reason, by applying an external force to the resin annular member 31 of the upper alignment roller 30, the rubber plate 47 is elastically deformed, and the upper alignment roller 30 is eccentric.

  Further, two sets of the upper conveying roller 27 and the upper alignment roller 30 are provided on one rotating shaft 36. Further, an annular protrusion 42 is provided in the middle of the rotation shaft 36. Above the annular protrusion 42, a socket 40 of a compression coil spring 38 is disposed as an urging means. The cross-sectional shape of the socket 40 as viewed from the axial direction of the rotary shaft 36 is a bifurcated opening, and the upper surface of the inner wall of the socket 40 is in contact with the annular protrusion 42. For this reason, compared with the case where the socket 40 is made to contact | abut directly to the rotating shaft 36, frictional resistance is reduced and the rotating shaft 36 can rotate smoothly.

  Further, one end of the compression coil spring 38 is attached to the recess 41 formed on the upper surface of the socket 40, and the other end of the compression coil spring 38 is connected to the ceiling portion 58 of the recording medium processing apparatus 10 (not shown). (See FIG. 3). Since the compression coil spring 38 presses the socket 40 downward, the rotating shaft 36 on which the annular protrusion 42 is formed is biased toward the rotating shaft 34. Further, the socket 40 moves up and down along a guide (not shown) formed on a lower cover attached to the frame 56. For this reason, it does not tilt with respect to the rotating shaft 36. Further, the end surface 45A of the annular protrusion 45 having a smaller diameter than the annular protrusion 42 formed on the rotating shaft 36 is engaged with a guide of a lower cover (not shown), and the rotating shaft 36 is positioned so as not to move in the axial direction. Yes.

  As shown in FIG. 5, the end of the rotating shaft 36 is tiltably connected by a joint 50 as a joint member. Spherical joint portions 44R and 44L are formed at both ends of the shaft 50A of the joint 50. A cylindrical protrusion 46R is formed on the joint 44R so as to protrude to both sides in a direction orthogonal to the axial direction of the shaft 50A.

  In addition, the joint portion 44L is formed with a cylindrical protrusion 46L as in the joint portion 44R, and the protrusion 46L is formed at an angle around the axis of the shaft 50A with respect to the protrusion 46R. Yes. An annular protrusion 43 is formed in the middle of the shaft 50A.

  The rotating shaft protruding from the shaft portion 23 of the upper alignment roller 30 is a cylindrical body 36A, and a cylindrical joint receiving portion 52 is fixed to the cylindrical body 36A. The joint portion 44R is inserted into one joint receiving portion 52, and the joint portion 44L is inserted into the other joint receiving portion 52. The protrusion 46R and the protrusion 46L are fitted into a slit 52A formed in the axial direction from the opening 51 of the joint receiving portion 52 and a slit 36B formed in the cylindrical body 36A. Thereby, the adjacent upper conveyance roller 27 and the upper alignment roller 30 are allowed to move relative to each other in the X / Y axis direction and the rotation axis direction. Further, an annular protrusion 48 is formed on the joint receiving portion 52.

  An arm 54 that lifts the joint 50 is disposed downstream of the joint 50 in the transport direction. The arm 54 is suspended from a frame 56 described later, and a receiving portion 54A having a V-shaped cross section is formed in the lower portion of the arm 54. In addition, the V-shaped valley portion of the receiving portion 54A is disposed directly below the annular protrusion 43 provided at the center of the shaft 50A.

  As shown in FIG. 3, the frame 56 is a thin metal member disposed across one side frame 16 </ b> R and the other side frame 16 </ b> L, and both end portions are bent downward to form leg portions 60. Yes. Further, the four arms 54 described above are suspended from the frame 56.

  The lower end of the leg portion 60 formed on the frame 56 is in contact with a cam 62 as a moving means. The leg portion 60 is inserted through a guide portion 64 formed on the side surfaces of the side frames 16R and 16L. The leg portion 60 is supported by the guide portion 64 so as to be movable in the vertical direction.

  The cam 62 in contact with the leg portion 60 is connected by a camshaft 66, and one end portion of the camshaft 66 is transmitted with a driving force from a cam motor 68. As the cam motor 68, a motor capable of controlling the rotation angle with high accuracy, such as a stepping motor or a servo motor, is used. The cam motor 68, the conveyance motor 33, the optical sensor 70, the optical sensor 72, and the shutter 20 (see FIG. 1) are connected to a control device (not shown).

  Next, the operation of the recording medium processing apparatus of this embodiment will be described.

(Standby position)
As shown in FIGS. 6 to 9, the recording medium transport mechanism 18 of the present embodiment adjusts the height of the rotary shaft 36 by rotating the cam 62 and lifting or lowering the joint 50, so that the recording medium transport mechanism 18 is in three positions. The recording medium P is conveyed while switching. 6 (A) is a state waiting position recording medium P is waiting to be inserted. Here, since the cam 62 is locked by the cam motor 68 so as to maintain the cam 62 at a constant rotation angle, the cam 62 does not rotate with the weight of the frame 56.

  As shown in FIG. 7, a gap S <b> 1 is formed between the upper transport roller 27 and the lower transport roller 28 at the standby position. A gap S <b> 2 is formed between the upper alignment roller 30 and the lower alignment roller 32. The gap S3 is set to be larger than the thickness of the recording medium P being conveyed.

(Insertion position)
Next, when the recording medium P is inserted, the cam motor 68 is rotated by a predetermined amount to bring the cam 62 and the leg 60 into the state of the insertion position shown in FIG. As the cam 62 rotates from the state shown in FIG. 6A to the state shown in FIG. 6B, the frame 56 is lowered by S2. Therefore, as shown in FIG. 8, the joint 50 and the rotating shaft 36 supported by the receiving portion 54A of the arm 54 are also lowered by S2 from the state of FIG. 7, and the upper alignment roller 30 and the lower alignment roller 32 And the inserted recording medium P is clamped.

(Transport position)
As shown in FIG. 6C, at the transfer position, the cam 62 is rotated to a position where the leg portion 60 is lowered most. At this time, the legs 60 of the frame 56 which is in contact with the cam 62 is lowered by S3 from the position of the insertion position of FIG. 6 (B).

  As shown in FIG. 9, at the transport position, the rotary shaft 36 is lowered by S1, so the upper transport roller 27 and the lower transport roller 28 sandwich the recording medium P. Since the upper alignment roller 30 is further pressed toward the lower alignment roller 32 from the state in contact with the lower alignment roller 32, the rubber plate 47 is elastically deformed and the center of the resin annular member 31 is centered. Shifts up. For this reason, the upper conveyance roller 27 and the lower conveyance roller 28 can move to the conveyance position.

  Next, a flow in which the recording medium processing apparatus transports the recording medium will be described.

  When the recording medium processing apparatus 10 is turned on, the cam 62 is in the standby position shown in FIG. 6A until the recording medium P is inserted. As shown in FIG. Clearances S1 and S3 are formed between the roller 27 and the lower transport roller 28 and between the upper alignment roller 30 and the lower alignment roller 32, respectively.

  As shown in FIG. 10, in step 100, it is determined whether or not the optical sensor 70 has detected the recording medium P. In FIG. 1, when the recording medium P inserted into the recording medium processing apparatus 10 passes over the optical sensor 70, the optical sensor 70 detects the recording medium P and proceeds to step 102. Here, a control device (not shown) counts the number of optical sensors 70 that have detected the recording medium P, and determines the width of the inserted recording medium P. For example, if the recording medium P is detected by the three optical sensors 70 in FIG. 1, it is determined that the width of the recording medium P is twice to three times the distance between the adjacent optical sensors 70.

  Next, in step 102, the conveyance motor 33 is driven to rotate the rotating shaft 34 forward. The positive rotation here refers to a direction in which the recording medium P is transported downstream in the transport direction (the direction of arrow A). As shown in FIG. 7, since the drive gear 35 and the driven gear 37 are engaged with each other, when the rotating shaft 34 rotates, the rotating shaft 36 also rotates simultaneously.

  Next, in step 104, the cam motor 68 is driven to rotate the cam 62 from the standby position in FIG. 6 (A) to the insertion position in FIG. 6 (B). Thus, the upper alignment roller 30 and the lower alignment roller 32 pinch and convey the recording medium P until it hits the shutter 20.

  Here, as shown in FIG. 11A, when the recording medium P sandwiched and conveyed by the shutter 20 is inclined, one end P1 in the width direction of the recording medium P reaches the shutter 20 first. Become. Since the shutter 20 blocks the conveyance path 14, the width direction one end P <b> 1 of the recording medium P hits the shutter 20 and stops.

  At this time, since the upper alignment roller 30 and the lower alignment roller 32 continue to rotate in the direction of the arrow, the other end P2 in the width direction of the recording medium P that has not reached the shutter 20 is indicated by the arrows X1 and X2. To the shutter 20 and the state shown in FIG. 11B is obtained.

  Further, since the contact surfaces of the upper alignment roller 30 and the lower alignment roller 32 that come into contact with the recording medium P are formed of a resin such as plastic, the frictional force applied to the recording medium P is small. Therefore, the resin annular member 31 and the lower alignment roller 32 of the upper alignment roller 30 that sandwich the width direction end portion P1 side of the recording medium P slide on the surface of the recording medium P. Force cannot be applied in the transport direction. Therefore, it is possible to prevent the width direction end portion P1 of the recording medium P from being bent.

  Next, in step 106 in FIG. 10, it is determined whether a predetermined number of optical sensors 72 have detected the recording medium P. Since the case where the recording medium P is inclined is also assumed, the condition is not satisfied only by detection by one optical sensor 72. In the state shown in FIG. 11A, since only two optical sensors 72 are completely blocked by the recording medium P, the condition of step 106 is not satisfied, and the conveyance of the recording medium P is continued. In the state of FIG. 11B, since the seven optical sensors corresponding to the width of the recording medium P detect the recording medium P, it is determined that the condition of step 106 is satisfied.

  Note that the number of optical sensors 72 serving as a determination criterion is appropriately set in consideration of the width of the recording medium P to be conveyed. In addition, since the control device (not shown) determines the width of the recording medium P by counting the number of the optical sensors 70 that have detected the recording medium P in Step 100, the determined width of the recording medium P is determined. Based on the above, the number of optical sensors 72 serving as a determination criterion in step 106 may be set.

  If the predetermined number of optical sensors 72 do not detect the recording medium P, the process proceeds to step 108 and it is determined whether a predetermined time has elapsed. If a predetermined time has passed without the predetermined number of optical sensors 72 detecting the recording medium P, it is determined that some conveyance failure has occurred and the recording medium P cannot be aligned with the shutter 20, and the conveyance motor 33 is reversed. Then, the recording medium P that could not be loaded in the correct posture is returned to the insertion slot 12 (step 126).

  When the predetermined number of optical sensors 72 detect the recording medium P in step 106, the transport motor 33 is temporarily stopped (step 110). Thereafter, a control device (not shown) moves the shutter 20 to open the conveyance path 14 (step 112).

  Next, at step 114, the cam motor 68 is driven to rotate the cam 62 from the insertion position in FIG. 6B to the conveyance position in FIG. 6C. In the transport position, the recording medium P is sandwiched between the upper transport roller 27 and the lower transport roller 28, and the upper alignment roller 30 and the lower alignment roller 32.

  In the following step 116, the conveying motor 33 is driven to rotate the rotating shaft 34 in the reverse direction, and the recording medium P is conveyed in the direction opposite to the arrow A shown in FIG. Then, it is determined whether all the optical sensors 72 are turned off (step 118). The rotating shaft 34 is rotated in the reverse direction until all the optical sensors 72 are turned off. However, in consideration of a conveyance failure, when all of the optical sensors 72 are not turned off within a predetermined time, the recording medium is returned. May be added.

  When all the optical sensors 72 are turned off in step 118, the process proceeds to step 120, and the transport motor 33 is rotated forward. Then, the recording medium P passes through the optical sensor 72 again. Here, it is determined whether the posture of the recording medium P is ready (step 122). That is, if the timing at which the plurality of optical sensors 72 arranged in the width direction of the recording medium P are turned on is not shifted, it can be confirmed that the recording medium P is not inclined with respect to the plurality of optical sensors 72. .

  If the timing at which the optical sensor 72 is turned on is deviated, it is determined that the recording medium P is inclined due to some conveyance failure, and the recording medium P is returned to the insertion slot 12 (step 126). If the timing at which the optical sensor 72 is turned on is not deviated, the recording medium P is nipped and conveyed to the recording medium processing apparatus (step 124).

  Next, a case where a narrow recording medium P is conveyed will be described. As shown in FIG. 12, the height of the rotation shaft 36 of the upper transport roller 27 that sandwiches the recording medium P is higher than the height of the rotation shaft 36 of the upper transport roller 27 that does not sandwich the recording medium P. It is higher by the thickness of the medium P.

  At this time, the adjacent rotary shafts 36 are tiltably connected by the joint 50, so that only the joint 50 is tilted by the thickness of the recording medium P while the rotary shaft 36 is kept parallel to the rotary shaft 34. It will be. In this way, even when the recording medium P having different widths is conveyed, the recording medium P can be uniformly nipped and conveyed by the upper conveying roller 27 and the lower conveying roller 28.

  In this embodiment, six upper transport rollers 27 and six lower transport rollers 28 are provided, but the number of rollers and the width of the rollers are not particularly limited. Further, the number of sockets 40 and arms 54 that urge the rotary shaft 36 is not particularly limited as long as the rotary shaft 36 connected by the joint 50 is lifted.

  Next, a recording medium transport mechanism according to the second embodiment will be described. In addition, description of the code | symbol similar to 1st Embodiment is abbreviate | omitted.

  As shown in FIG. 13, the recording medium transport mechanism 200 according to the second embodiment is provided with a joint 202 that connects the end of the rotation shaft 36 of the upper transport roller 27 so as to be tiltable. In addition, an arm 206 hangs down from the frame 204 toward the joint receiving portion 52 into which the end portion of the joint 202 is inserted.

  A receiving portion 206A having a V-shaped cross section is formed at the tip of the arm 206. The receiving portion 206A is configured to lift the joint receiving portion 52 formed at both ends of the rotating shaft 36, and at this time, the annular protrusion 48 formed on the joint receiving portion 52 and the receiving portion 208A come into contact with each other.

  Next, the operation of the recording medium transport mechanism according to this embodiment will be described.

  When the cam 62 is rotated from the transport position in FIG. 6C to the standby position in FIG. 6A to raise the frame 56, the receiving portion 206A is inserted at both ends of the joint 202 as shown in FIG. Since the joint receiving portion 52 is lifted, the joint 202 can be lifted without being tilted.

  Accordingly, since the frame 204 can be moved up and down while keeping the gap between the upper transport roller 27 and the lower transport roller 28 constant, the transport failure such that the inserted recording medium P contacts the upper transport roller 27. Can be suppressed. This is particularly effective when a large number of joints 202 are used in the width direction of the recording medium P. That is, as in the first embodiment shown in FIG. 3, when a large number of joints 50 are arranged when lifting the intermediate part of the joints 50, it is possible to keep all the joints 50 parallel to the rotation shaft 34. Although difficult, it is easy to keep the joint 202 parallel to the rotating shaft 34 by lifting both ends of the joint 202 as in the present embodiment shown in FIG.

  The first and second embodiments of the present invention have been described above, but the present invention is not limited to such embodiments, and the first and second embodiments may be used in combination. Needless to say, the present invention can be implemented in various forms without departing from the scope of the invention. For example, the present invention may be used for a time recorder that prints on a time card or a device that prints on a passbook used in a financial institution or the like.

DESCRIPTION OF SYMBOLS 10 Recording medium processing apparatus 18 Recording medium conveyance mechanism 20 Shutter 25 Print head (printing part)
27 Upper conveying roller (moving roller)
28 Lower transfer roller (fixed roller)
30 Upper alignment roller 32 Lower alignment roller 35 Drive gear 36 Rotating shaft 37 Driven gear 38 Compression coil spring (biasing means)
44R Fitting 44L Fitting 50 Joint (Fitting)
54 Arm (support arm)
56 Frame 62 Cam (moving means)
70 Optical sensor (first detection means)
72 Optical sensor (second detection means)
200 Recording medium transport mechanism 202 Joint 204 Frame

Claims (5)

A frame provided so as to be movable in the vertical direction across the conveyance path of the recording medium;
A plurality of moving rollers arranged in a line along the frame;
A fixed roller that is disposed below the moving roller and sandwiches and conveys a recording medium together with the moving roller;
Urging means for urging the rotating shaft of the moving roller toward the fixed roller;
A joint member for connecting the rotating shafts to each other in a tiltable manner and transmitting a driving force;
A support arm formed on the frame and capable of supporting the joint member;
Moving means for moving the frame up and down;
I have a,
The joint member includes a rod-shaped connecting member, and a joint portion that is formed at both ends of the connecting member and is tiltably connected to the rotating shaft of the moving roller,
The support arm is a recording medium transport mechanism that supports the joint portion so as to be movable in the vertical direction . The recording medium conveyance mechanism according to claim 1, wherein the moving unit is a cam that rotates in contact with the frame . A driving gear provided at one end of the rotating shaft of the fixed roller and driving the fixed roller;
A driven gear that meshes with the drive gear and transmits a driving force;
A support portion for rotatably supporting the rotation shaft of the driven gear and the rotation shaft of the drive gear;
Have
The recording medium conveyance mechanism according to claim 1 , wherein a rotation shaft of the driven gear and a rotation shaft of the moving roller are connected by the joint member . An annular roller portion made of resin, provided on the rotating shaft of the rubber-made moving roller, and an elastic body provided between the roller portion and the rotating shaft, and having a larger diameter than the moving roller. An upper alignment roller;
Provided on the rotating shaft of the fixed roller made of rubber, forms a gap between the moving roller and the fixed roller in contact with the upper alignment roller, and a lower alignment roller formed of resin;
A shutter that is provided downstream of the upper alignment roller and the lower alignment roller in the recording medium conveyance direction, and opens and closes the recording medium conveyance path;
The recording medium transport mechanism according to claim 1, comprising: A recording medium transport mechanism according to claim 4;
A first detection unit that is provided upstream of the moving roller and the fixed roller in the conveyance direction of the recording medium and detects the recording medium;
A plurality of second detecting means provided between the moving roller and the fixed roller and the shutter in a direction orthogonal to a conveying direction and detecting a conveyed recording medium;
A printing unit provided on the downstream side in the transport direction from the shutter;
A recording medium processing apparatus comprising:

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