JP2008201067A - Stamping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To propose a stamping device, the pressing force of a stamp against a printing medium of which can be retained constant even under the condition that the pressing position of the stamp against the printing medium varies. <P>SOLUTION: In the stamping device 1, the stamp 2 is mounted through a stamp mounting stand 3 slidable backwards relative to a slider 4 instead of directly mounting to the slider 4 under the condition that the stamp mounting stand 3 is pulled forwards by means of a tensile coil spring 35 not to slide backwards. Even when the pressing position of the stamp 2 by the slider 4 varies back and forth, the variation is absorbed through the sliding of the stamp mounting stand 3 by means of the extension of the tensile coil sprint 35. The stamp 2 mounted on the stamp mounting stand 3 is pressed against the surface of the printing medium 8 at a certain pressing force by the spring force of the tensile coil spring 35. Consequently, even under the condition that the pressing position of the stamp 2 by the slider 4 varies, the pressing force against the printing medium 8 of the stamp 2 is retained constant. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stamp device that extrudes a stamp by a driving mechanism using a motor or the like and presses the stamp onto a printing medium to imprint characters or the like, and the printing medium is printed with a constant pressing force even if the moving position of the stamp by the driving mechanism varies. The present invention relates to a stamp device that can be pressed against a medium, and a medium processing device such as a check reading device equipped with the stamp device.

This type of stamp device is mounted and used in a check reading device as described in Patent Document 1, for example. In the check reading device, while transporting checks (securities) such as checks and bills along the transport path, the magnetic ink characters are read by the magnetic head arranged in the transport path, and the image data is read by the scanner. A character string such as “electronic payment completed” is stamped on the check after reading by the stamp device.
JP 2003-141367 A

  Here, in the stamp device, if the stamp pushed out by a drive mechanism including a motor or the like is not pressed against the surface of the printing medium with a constant pressing force, variations in ink transfer amount, stamp life, and the like occur.

  In order to make the pressing force of the stamp constant, it is necessary to accurately manage the pressing position of the stamp with respect to the printing medium. However, due to variations in the dimensions of the components that make up the stamp drive mechanism, assembly errors of these components, variations in the detection accuracy of the detector for detecting the movement position of the stamp, etc., the stamp pressing position Naturally, variations occur. For this reason, there is a problem that the pressing force of the stamp cannot be managed with high accuracy.

  In view of this point, an object of the present invention is to propose a stamp device that can keep the pressing force of a stamp on a printing medium constant even if the pressing position of the stamp against the printing medium varies.

In order to solve the above-described problems, the present invention provides a stamp apparatus that performs printing by advancing a stamp and pressing the surface of a print medium.
A stamp mounting base to which the stamp is attached;
A slider mounted in a state in which the stamp mounting base is relatively slidable in a direction in which the stamp moves backward with respect to the print medium;
An elastic member holding the stamp mount so as not to slide relative to the slider;
It has a slider drive mechanism for sliding the slider in the forward and backward directions of the stamp.

  In the stamp device of the present invention, the stamp mounting base on which the stamp is mounted is mounted on the slider in a relatively slidable state, and the slider is slid by a slider driving mechanism having a driving source such as a motor or a plunger. ing. By sliding the slider forward (in the direction toward the printing medium) by the slider driving mechanism, the stamp can be positioned at a pressing position where the stamp transfer surface is pressed against the printing medium.

  Further, when the slider is further slid forward after the stamp hits the surface of the printing medium by the slider, the pressing force of the stamp increases accordingly. The stamp mounting base on which the stamp is mounted is held by an elastic member so as not to slide backward (in the direction of retracting from the printing medium). Therefore, as the pressing force acting on the stamp increases, the elastic member elastically deforms and the stamp mounting base slides rearward relative to the slider. Further, the pressing force of the stamp is kept constant by the elastic force of the elastic member.

  Therefore, if the stamp pressing position by the slider is set so that the elastic member is elastically deformed by a predetermined amount, even if the stamp pressing position by the slider fluctuates back and forth, the stamp mounting base moves against the slider. The variation in the pressed position is absorbed by sliding the slide. In addition, the stamp positioned at the pressing position is pressed against the surface of the print medium with a constant pressing force by the elastic force of the elastic member.

  Here, when the slider is provided with a front stopper and a rear stopper that define the slide range of the stamp mounting base, the stamp mounting base is urged toward the front stopper as the elastic member. An arranged spring member can be used.

  Further, when a common slide guide shaft for guiding the slider and the stamp mounting base is used, the front stopper and the rear stopper of the slider are slidably supported on the slide guide shaft. The stamp mounting base is provided with a front arm portion and a rear arm portion supported in a slidable state at a portion between the front stopper and the rear stopper on the slide guide shaft, and the spring As the member, a tension coil spring that is stretched between the front stopper of the slider and the rear arm portion of the stamp mounting base can be used.

  Furthermore, as a stamp, the thing of the structure provided with the rotary roller in which the stamp transfer surface is formed in the circular outer peripheral surface can be used. In this case, the roller pressed against the surface of the moving print medium prints on the surface of the print medium while rotating as the print medium moves.

  In addition, by mounting the above-described stamp device on a print medium conveyance path of a medium processing device such as a check reading device, it is possible to print a mark indicating settlement or the like on a processed print medium such as a check with high quality. .

  In the stamp device of the present invention, instead of directly mounting the stamp on the slider, the tension coil spring is attached to a stamp mounting base that is slidable rearward relative to the slider so that the stamp mounting base does not slide backward. The stamp mounting base is supported by an elastic member such as.

  Therefore, even if the pressing position of the stamp by the slider varies back and forth, such variation is absorbed by the slide of the stamp mounting base due to the elastic deformation of the elastic member. Further, the stamp attached to the stamp mounting base is pressed against the surface of the print medium with a constant pressing force by the elastic force of the elastic member to perform a stamping operation.

  Therefore, according to the present invention, even if the pressing position of the stamp by the slider varies, the pressing force of the stamp against the printing medium is kept constant. Can be suppressed.

  Hereinafter, embodiments of a stamp apparatus to which the present invention is applied will be described with reference to the drawings.

  FIGS. 1A and 1B are a perspective view and a plan view showing the stamp device, and FIGS. 2A and 2B are a perspective view and a plan view showing a state where the stamp and the stamp mounting base are removed from the stamp device. FIG.

  The stamp device 1 according to the present embodiment includes a stamp 2, a stamp mounting base 3 to which the stamp 2 is mounted, a slider 4 on which the stamp mounting base 3 is mounted, and a front-rear direction indicated by an arrow A. And a slider drive mechanism 5 for sliding them.

  The slider drive mechanism 5 includes a stepping motor 51 as a drive source, and the stepping motor 51 is attached to the lower side of the rectangular top plate portion 53 of the gate-type device frame 52 in an upward state. The device frame 52 is formed with a screw hole for attachment to a check reading device or the like. A rotation shaft (not shown) of the stepping motor 51 protrudes upward from an opening formed in the top plate portion 53, and a pinion 54 is attached to the tip thereof as shown in FIG. The top plate portion 53 has a flat upper surface portion 53a, and a front support plate 55 and a rear support plate 56 are formed on one side of the top plate portion 55 so as to stand perpendicularly to the front and rear ends. Between the front support plate 55 and the rear support plate 56, a slide guide shaft 57 is stretched horizontally in the front-rear direction.

  The slider 4 includes a main body portion 42 having a flat upper surface portion 41, a front arm portion 43 (front stopper) and a rear arm portion projecting laterally from front and rear ends of one side portion of the main body portion 42. 44 (rear side stopper) and flat left and right slide surfaces 45 formed on the bottom surface of the main body portion 42. A slide guide shaft 57 passes through the front arm portion 43 and the rear arm portion 44 in a slidable state, and the flat slide surface 45 can slide on the flat upper surface portion 53 a of the top plate portion 53 of the apparatus frame 52. It is in a state. Therefore, the slider 4 can slide in the front-rear direction along the slide guide shaft 57.

  As can be seen from FIG. 2, the body portion 42 of the slider 4 is formed with an opening 46 at a portion where the pinion 54 protrudes from below, and one side surface of the opening 46 extending in the front-rear direction. Is formed with a rack 47 which meshes with the pinion 54. When the stepping motor 51 rotates, the slider 4 slides in the front-rear direction via the pinion 54 and the rack 47.

  The forward slide limit of the slider 4 is a position where the front arm portion 43 hits the front support plate 55 of the apparatus frame 52, and the rear slide limit of the slider 4 is the rear arm portion 44 of the apparatus frame 52. This is a position where it hits the rear support plate 56. In this example, the retracted position of the slider 4 is set as the slide limit position defined by the rear support plate 56, and the amount of sliding forward from the retracted position is based on the detection signal of the position detector 58 attached to the apparatus frame 52. The advance position of the slider 4 (pressing position of the stamp 2) is regulated by managing the number of steps of the stepping motor 51.

  Here, a front spring hook 49 protruding downward is formed at the center of the front end of the main body portion 42 of the slider 4. Further, a rear spring hook 59 (see FIG. 2) protruding upward is formed at the center of the rear end of the top plate portion 53 of the device frame 52. A return tension coil spring 6 is stretched between the front and rear spring hooks 49 and 59 in a tension state. When the power supply to the stepping motor 51 is inadvertently stopped, the slider 4 in the middle position can be forcibly returned to the retracted position by the tensile force of the return tension coil spring 6.

  Next, as shown in FIG. 1, the stamp mounting base 3 includes a mounting base body portion 31 that is slidable in the front-rear direction on a flat upper surface portion 41 of the main body portion 42 of the slider 4, and the mounting base. A front arm portion 33 and a rear arm portion 34 projecting sideways from front and rear ends of one side portion of the main body portion 31 are provided. A slide guide shaft 57 passes through the front arm portion 33 and the rear arm portion 34 in a slidable state. Further, the front arm portion 33 and the rear arm portion 34 are located between the front arm portion 43 and the rear arm portion 44 of the slider 4. Therefore, the stamp mount 3 can be slid in the front-rear direction along the slide guide shaft 57, and can be slid forward until the front arm portion 33 hits the front arm portion 43 of the slider 4, and thereafter The slide is possible until the rear arm 34 hits the rear arm 44 of the slider 4.

  Here, a front spring hook 43a protruding upward is formed on the front arm 43 of the slider 4, and a rear spring hook 34a protruding upward is formed on the rear arm 34 of the stamp mounting base 3. ing. A tension coil spring 35 is stretched between the front and rear spring hooks 43a and 34a. Therefore, the stamp mounting base 3 is held in a state where the front arm portion 33 is pressed against the front arm portion 43 of the slider 4, and slides back and forth together with the slider 4. However, when the stamp mounting base 3 is pushed backward with a force larger than the tensile force of the tension coil spring 35, the stamp mounting base 3 can be slid rearward relative to the slider 4.

  Next, the stamp 2 is fixed to the upper surface 32 of the mount body portion 31 of the stamp mount 3. The stamp 2 includes a stamp case 21 and a stamp roller 22 having an outer peripheral surface portion protruding forward by a predetermined amount from the front opening 21a of the stamp case 21. The roller shaft 23 of the stamp roller 22 is rotatably supported by the stamp case 21 in a vertical posture. The stamp roller 22 includes a flat cylindrical holder 24 and an annular transfer member 25 made of a porous material concentrically covering the outer periphery of the holder 24. The transfer member 25 is impregnated with ink. And oozes out on the transfer surface 25a formed on the outer periphery thereof. On the transfer surface 25a, an ink transmission portion formed of a negative image obtained by inverting printed characters is formed. When the transfer surface 25a is pressed against the surface of the print medium, the ink oozes out from the ink transmitting portion and the print characters are transferred to the print medium. In order to extend the life of the ink, a configuration in which an ink tank storing ink is disposed at a position in contact with the transfer member 25 and the ink is supplied to the transfer member 25 is also possible.

(Printing operation)
Next, FIG. 3 is an explanatory view showing the printing operation of the stamp device 1, (a) shows its standby state, and (b) and (c) show the pressing state where the stamp 2 is pressed against the printing medium, respectively. Show. In these drawings, the slider 4 is indicated by a hatched portion whose outline is a broken line.

  In the standby state shown in FIG. 3A, the slider 4 is held at the retracted position 4 </ b> A pressed against the rear support plate 56 of the apparatus frame 52 by the return tension coil spring 6. The stamp mount 3 mounted on the slider 4 is pressed against the front arm 43 of the slider 4 by the tension coil spring 35, and the stamp 2 mounted on the stamp mount 3 is in the standby position 2A. In this state, a gap a is formed between the rear arm portion 34 of the stamp mounting base 3 and the rear arm portion 44 of the slider 4.

  In this state, when the stepping motor 51 is driven to slide the slider 4 forward, the slider 4 is detected by the position detector 58. From the time point of detection by the position detector 58, the amount of sliding forward of the slider 4 is managed by the number of driving steps of the stepping motor 51. When the slider 4 moves forward, the stamp mount 3 mounted thereon also moves forward. Therefore, the stamp 2 also moves forward together with the slider 4.

  As shown in FIG. 3B, when the stepping motor 51 is driven by a predetermined number of steps, the slider 4 reaches the forward position 4B. Here, the transfer surface 25a of the stamp 2 defines the printing position immediately before the slider 4 reaches the forward movement position 4B, and is positioned on the medium guide surface 7 that forms the conveyance path in the check reading device or the like. It is set so as to hit the surface of the print medium 8. That is, when the medium guide surface 7 and the print medium 8 are not present, the stamp 2 is set to advance to the position indicated by the imaginary line 2a. After the stamp 2 hits the surface of the print medium 8, the stamp 2 is prevented from moving forward, so that the stamp mounting base 3 to which the stamp 2 is attached cannot move forward together with the slider 4.

  As a result, as the slider 4 advances, the stamp mounting base 3 slides rearward relative to the slider 4 while extending the tension coil spring 35, and the front arm portion 33 of the stamp mounting base 3 moves to the front stopper 43 of the slider 4. From the distance b1. Therefore, when the slider 4 reaches the forward movement position 4A, the stamp 2 attached to the stamp mounting base 3 reaches the pressing position 2B pressed against the surface of the printing medium 8 with a constant pressing force by the spring force of the tension coil spring 35. It will be positioned. In this state, printing is performed on the surface of the print medium 8 that moves along the medium guide surface 7.

  Here, a case where the advance position 4B of the slider 4 by the slider drive mechanism 5 is shifted back and forth will be described. For example, when the forward movement position of the slider 4 is shifted forward by a distance b2 with respect to the forward movement position 4B shown in FIG. 3B, the forward movement position of the slider 4 is moved forward as shown in FIG. The stamp 2 is pressed against the surface of the print medium 8 in a state where the stamp mounting base 3 is slid relative to the slider 4 backward by the amount of displacement (distance b2). That is, when the medium guide surface 7 and the print medium 8 do not exist, the stamp 2 advances to the position indicated by the imaginary line 2b and is ahead by the distance b2 from the position of the imaginary line 2a shown in FIG. Therefore, the stamp mounting base 3 moves backward with respect to the slider 4 by a distance b2. However, even in this case, the stamp 2 is pressed against the surface of the print medium 8 with a constant pressing force by the spring force of the tension coil spring 35.

  On the contrary, when the forward movement position 4B of the slider 4 is shifted backward, only the sliding amount of the stamp mounting base 3 with respect to the slider 4 is reduced. In this case, the stamp 2 also has a tension coil spring 35. It is pressed against the surface of the print medium 8 with a constant pressing force by the spring force.

  Thus, in this example, the stamp mount 3 can be slid relative to the slider 4 backward by the distance a. Therefore, the forward / backward displacement of the forward movement position 4B of the slider 4 is absorbed by the relative sliding of the stamp mount 3 to the rear with respect to the slider 4, and the stamp 2 on the stamp mount 3 is subjected to the spring force of the tension coil spring 35. Therefore, it is always pressed against the surface of the print medium 8 with a constant pressing force.

  Next, in the stamp device 1 of this example, the slider 4 is always pulled toward the retracted position 4A by the return tension coil spring 6. Accordingly, when the power supply to the stepping motor 51 is interrupted when the slider 4 is being held at the forward movement position 4B while the slider 4 is moving from the backward movement position 4A to the forward movement position 4B, the slider 4 Is pulled back to the retracted position 4A without stopping at that position. That is, by the spring force of the return tension coil spring 6, the slider 4 is pulled back to the retracted position 4A where the rear arm portion 44 abuts against the rear support plate 56 of the apparatus frame 52, and the state shown in FIG. There is to go back.

  Therefore, even when the power is shut off during printing, it is possible to avoid the state in which the transfer surface 25a of the stamp 2 remains pressed against the print medium 8. Further, it is possible to prevent the medium guide surface 7 and the like from being stained with ink.

(Other embodiments)
In the above example, the stamp mounting base 3 is held by the tension coil spring 35 so as not to move backward with respect to the slider 4. Instead, the rear end of the stamp mounting base 3 is supported by a compressed spring member or an elastically deformable elastic member, and the stamp 2 is pressed against the printing medium 8 and the stamp mounting base 3 is pushed backward. Then, the spring member or the elastic deformation member may be compressed to press the stamp 2 against the print medium 8 with a constant pressing force.

  In the above example, the stepping motor 51 is used as a drive source for sliding the slider 4. When the operation speed may be slow, a motor other than the stepping motor can be used. A plunger may also be used.

(Example of media processing device provided with stamp device)
Next, FIG. 4 is an external perspective view showing a check reading apparatus which is an example of a medium processing apparatus provided with the stamp apparatus having the above configuration. The check processing apparatus 101 includes a main body case 102 and a lid case 103 placed on the upper side of the main body case 102, and each component is incorporated therein. The cover case 103 is formed with a conveyance path 105 for a check 104 (print medium) made of a narrow vertical groove. When viewed from above, the conveyance path 105 has a U shape as a whole, and includes a straight upstream conveyance path portion 106, a curved conveyance path portion 107 continuous with the straight conveyance path portion 107, and a slight bend continuously therewith. And a downstream conveyance path portion 108.

  The upstream end of the upstream conveyance path portion 106 communicates with a check insertion portion 109 formed of a wide vertical groove. The downstream end of the downstream conveyance path portion 108 is connected to first and second check discharge sections 111 and 112 each having a wide vertical groove via branch paths 110a and 110b branched to the left and right.

  The check 104 to be read has a magnetic ink character 104A printed on the lower end portion of the surface 104a thereof. In addition, the front surface 104a describes an amount of money, a maker, a number, a signature, and the like, and the back surface 104b is provided with an endorsement column.

  FIG. 5 is an explanatory diagram showing the internal mechanism of the check processing apparatus 101. The check insertion portion 109 is provided with a feed roller 113 for feeding the check 104 inserted in a stacked state here one by one to the transport path 105 and a pressing member 114 for pressing the check 104 against the feed roller 113. Has been.

  A transport mechanism that transports the check 104 along the transport path 105 includes a transport motor 121, a drive pulley 122 attached to the rotation shaft of the transport motor 121, and transport rollers 131 to 137 disposed along the transport path 105. And presser rollers 141 to 147 that are pressed against the respective transport rollers 131 to 137 and rotated together. The rotation of the pressing roller 147 is transmitted to the discharge roller 149 via the transmission gear 148. Further, an endless belt 123 is provided for transmitting the rotation of the transport motor 121 to the transport rollers 131 to 137.

  The conveyance rollers 131 to 134 are disposed at the upstream end of the upstream conveyance path portion 106, the middle position thereof, and the boundary position with the curved conveyance path portion 107, respectively. The conveyance roller 35 is disposed at a downstream position in the curved conveyance path portion 107. The conveyance roller 136 is disposed at a middle position in the downstream conveyance path portion 108, and the conveyance roller 137 is disposed at the discharge port portion of the second check discharge portion 112. The discharge roller 149 is disposed at the discharge port portion of the first check discharge unit 111.

  Between the transport rollers 132 and 133, a front side contact image scanner 152 as a front side image reading unit and a back side contact image scanner 153 as a back side image reading unit are arranged. A magnetic head 154 for reading magnetic ink characters is disposed between the transport rollers 133 and 134. On the downstream side of the conveyance roller 136 in the downstream conveyance path portion 108, the stamp device 1 is disposed. The stamp device 1 is movable between a printing position pressed by the check 104 and a standby position retracted from the printing position.

  A switching plate 166 that is switched by a drive motor (not shown) is disposed at the upstream end of the branch paths 110a and 110b. The switching plate 166 selectively switches the downstream end of the transport path 105 with respect to the first and second check discharge units 111 and 112 and guides the check 104 to the selected discharge unit.

  An outline of the processing operation of the check processing device 1 having this configuration will be described. For example, when the operator inputs a reading start command from a host computer system (not shown), the feeding roller 113 rotates and the pressing member 114 moves to press the check 104 against the feeding roller 113. As a result, the check 104 is sent out to the transport path 5 by the feeding roller 113. Further, the transport motor 121 is driven, and the transport rollers 131 to 137 are rotationally driven.

  The check 104 delivered to the conveyance path 5 is conveyed along the conveyance path 105 while being sequentially delivered to the conveyance rollers 131 to 136. The front and back images and the magnetic ink characters of the check 104 being conveyed are read by the front-side contact image scanner 152, the back-side contact image scanner 153, and the magnetic head 154, respectively.

  The read information is transmitted to a host computer system. The front side image, the back side image, and the magnetic ink character information read on the computer system side are processed to determine whether the reading has been performed normally. When the check 104 is conveyed upside down, the magnetic ink character cannot be recognized, and it is determined that the reading is defective. When the check 104 is conveyed in the reverse state, the magnetic ink character information cannot be obtained, so that it is determined that reading is impossible. Further, even when a part of the magnetic ink characters cannot be read due to the check 104 being folded or torn, or being skewed during conveyance, it is determined that the reading is defective. Further, from the front and back image information, even when the check 104 is broken, torn, or skewed at the time of conveyance, etc., it is determined that the reading is defective even when predetermined information such as money amount information cannot be recognized.

  If it is determined that the reading is normal, the stamp 2A of the stamp device 1 is moved to the printing position (pressing position 2B). The check 104 is conveyed while printing such as “electronic payment completed” is performed by the stamp device 1, and is discharged to the first check discharge unit 111 side by the switching plate 166.

  On the other hand, when a determination result such as reading failure or reading failure is obtained, the switching operation of the switching plate 166 is performed. The stamp 2 of the stamp apparatus 1 is held at the standby position 2A, and printing on the check 104 is not performed. The check 104 is distributed to the second check discharge unit 112 by the switching plate 166 and discharged there.

  Of course, the stamp apparatus of the present invention can be used in a medium processing apparatus other than the check processing apparatus.

It is the perspective view and top view of a stamp apparatus to which the present invention is applied. It is the perspective view and top view which abbreviate | omit and show a part of stamp apparatus of FIG. It is explanatory drawing which shows operation | movement of the stamp apparatus of FIG. It is an external appearance perspective view of the check processing apparatus provided with the stamp apparatus of FIG. It is explanatory drawing which shows the internal structure of the check processing apparatus of FIG.

Explanation of symbols

1 stamp device, 2 stamp, 2A stamp standby position, 2B stamp pressing position, 3 stamp mounting base, 4 slider, 4A slider retraction position, 4B slider advance position, 5 slider drive mechanism, 6 return tension coil spring , 7 Medium guide surface, 8 Print medium, 21 Stamp case, 22 Stamp roller, 23 Roller shaft, 24 Holder, 25 Transfer member, 25a Transfer surface, 31 Mounting base main body part, 32 Upper surface, 33 Front arm part, 34 Rear side Arm part, 34a Rear side spring hook, 35 Tension coil spring, 41 Upper surface part, 42 Main body part, 43 Front side arm part, 43a Front side spring hook, 44 Rear side arm part, 45 Slide surface, 46 Opening part, 47 Rack, 49 Front spring hook, 51 Stepping motor, 52 Device frame, 53 Top plate part, 53a Upper surface part, 54 pinion, 55 Front support plate, 56 Rear support plate, 57 Slide guide shaft, 58 Position detector, 59 Spring hook

Claims (5)

In a stamp device that performs printing by advancing the stamp and pressing the surface of the print medium
A stamp mounting base to which the stamp is attached;
A slider mounted in a state in which the stamp mounting base is relatively slidable in a direction in which the stamp moves backward with respect to the print medium;
An elastic member holding the stamp mount so as not to slide relative to the slider;
A stamp device comprising: a slider drive mechanism for sliding the slider in the forward and backward directions of the stamp. In claim 1,
The slider includes a front stopper and a rear stopper that define a sliding range of the stamp mount.
2. The stamp apparatus according to claim 1, wherein the elastic member is a spring member that urges the stamp mount to the front stopper. In claim 2,
A slide guide shaft for guiding the slider and the stamp mounting base;
The front stopper and the rear stopper of the slider are supported in a slidable state on the slide guide shaft,
The stamp mounting base includes a front arm portion and a rear arm portion supported in a slidable state at a portion between the front stopper and the rear stopper in the slide guide shaft,
The stamp device, wherein the spring member is a tension coil spring that is stretched between the front stopper of the slider and the rear arm portion of the stamp mounting base. In any one of claims 1 to 3,
The stamp includes a rotary roller having a stamp transfer surface formed on a circular outer peripheral surface,
A stamping apparatus, wherein the roller pressed against the surface of a moving print medium prints on the surface of the print medium while rotating as the print medium moves.   A medium processing apparatus comprising the stamp apparatus according to claim 1.

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