JP2020192736A - Seal - Google Patents

Abstract

To provide a seal that can exhibit a uniform sealing result at all times by always setting a constant timing at which a printing unit and a printing case supporting the unit move downward.SOLUTION: A seal includes an inner case 1, an outer case 2, a printing case 4 supporting a printing unit 3, and an ink application unit 5. The printing case 4 is supported by the inner case 1 via a first spring 41a, and the outer case 2 is supported by the printing case 4 via a second spring 42a. The ink application unit 5 is supported in a vertically slidable and longitudinally rockable manner by the inner case 1. An attitude displacement mechanism that downwardly operates and also rockably operates the ink application unit 5 is arranged between the ink application unit 5 and the outer case 2. An elastic force of the first spring 41a is set larger than an elastic force of the second spring 42a. While the ink application unit 5 is downwardly operated to a separation position by the outer case 2, the printing case 4 and the printing unit 3 are supported by the first spring 41a so as to be unable to move downward.SELECTED DRAWING: Figure 1

Description

The present invention relates to a stamp that retracts and swings the ink coating unit out of the descending region of the printing unit in conjunction with the stamping operation.

In the stamp of the present invention, when the printing operation is started, the ink coating unit first moves downward to separate the ink pad from the printing surface of the printing unit, and the ink pad rubs against the printing surface of the printing unit. This kind of stamp is known, for example, in the stamp holder of Patent Document 1.

The stamp holder of Patent Document 1 includes a lower case placed on the stamp paper surface, an upper case supported by the lower case so as to be slidable up and down, an inner cylinder on which the stamp is mounted, a vermilion plate, and the same plate. It is composed of a posture displacement mechanism that swings. The inner cylinder is supported by the lower case and can move up and down along with the upper case, and is pushed up and urged by a spring arranged between the lower case and the inner cylinder. The red meat plate is provided with a red meat container, a red meat (ink pad) attached to the container, and a reverse gate type rotating body fixed to the red meat container, and a rotating arm (swinging arm) constituting the rotating body. A protrusion (cam pin) is fixed to the upper end of). A long guide hole is formed in the rotating arm up and down, and by supporting this guide hole with a protrusion (swing shaft) fixed to the inner surface of the lower case, the rotating arm and the vermilion container can be moved up and down with respect to the inner cylinder. It is supported so that it can slide and swing back and forth. The attitude displacement mechanism is composed of cam holes formed in the lower case and the upper case, and protrusions (cam pins) of the rotating arm to be engaged with both cam holes at the same time. The cam hole of the lower case is provided with a vertical hole portion and a curved hole portion, and the cam hole of the upper case is provided with a vertical hole portion and an oblique hole portion.

The stamp holder of Patent Document 1 can be stamped by moving the stamp and the inner cylinder downward by placing the lower surface of the lower case on the stamping paper surface and pushing down the upper case against the pushing force of the spring. .. More specifically, when the upper case is started to be pushed down, the upper end of the spring is pushed down, and the force also acts on the inner cylinder. However, since the inner cylinder is held by the inner cylinder locking body attached to the lower case, it does not descend, and the protrusion of the rotating arm is pushed by the cam hole of the upper case, and only the rotating arm and the vermilion plate are left. It moves down and the red meat separates from the stamp surface. At this time, the guide hole of the rotating arm slides relative to the protrusion of the lower case. When the upper case moves downward by a predetermined length, the upper wall of the upper case comes into contact with the upper end of the inner cylinder. After that, the stamp and the inner cylinder accompany the upper case and descend, and the stamp surface is brought into close contact with the paper surface for stamping. can do. In a state linked to this stamping operation, the protrusion of the rotating arm is rotated by the cam holes provided in the lower case and the upper case, so that the rotating arm and the vermilion container bounce around the protrusion (swing axis). It is swung up and rocked to switch the vermilion dish to the retracted posture. When the pushing force of the upper case is released, the stamp, the inner cylinder, and the upper case are lifted by the spring to return to the stamp standby state. In addition, the rotating arm and the vermilion container return to the coating posture in which the vermilion is in close contact with the stamp surface. Patent Document 2 also discloses a seal holder similar to the above.

JP-A-2002-52795 Japanese Unexamined Patent Publication No. 2003-2006444

According to the stamp holders of Patent Documents 1 and 2, since the red meat is in close contact with the stamp surface of the stamp except when stamping, the upper case is repeatedly stamped by simply pushing down the upper case against the pushing force of the spring. can do. However, when the upper case is pushed down against the spring, the inner cylinder is held by the pair of inner cylinder locking bodies attached to the lower case, and the inner cylinder moves downward along with the upper case. Therefore, a slight variation in the spring force of the inner cylinder locking body tends to cause a deviation in the timing at which the inner cylinder moves downward. Specifically, if the spring force of the inner cylinder locking body is appropriate, the seal and the inner cylinder can be moved downward at the correct timing, but the spring force of the inner cylinder locking body is weak. , The seal and the inner cylinder move downward earlier than the set timing. On the contrary, if the spring force of the inner cylinder locking body is strong, the seal and the inner cylinder move downward later than the set timing. Further, the spring force of the inner cylinder locking body tends to decrease as the period of use is prolonged. As a result, the stamping pressure of each stamp holder tends to vary, and it is difficult to obtain a uniform stamping result. Further, since the J-shaped cam hole for rotating the protrusion of the rotating arm is formed on the upper case on the outermost surface, it is inevitable that the protrusion and the cam hole are exposed on the surface of the upper case. The impression of the appearance of the seal holder is easily spoiled.

INDUSTRIAL APPLICABILITY According to the present invention, the timing at which the printing unit and the printing case supporting the unit move downward can always be made constant, and the timing deviation due to the timed change of the spring force can be eliminated to always exhibit a uniform marking result. It is to provide a seal.

The stamp according to the present invention includes a tubular inner case 1 whose lower end is in contact with the printing paper surface, and an outer case 2 which is arranged outside the inner case 1 and is configured to be slidable up and down with respect to the inner case 1. , A printing case 4 arranged inside the inner case 1 and slidable up and down with respect to the inner case 1, a printing unit 3 supported by the printing case 4, and up and down with respect to the inner case 1. It is slidably supported and swings back and forth, and is arranged between the ink coating unit 5 that applies ink to the printing surface of the printing unit 3 and the inner case 1 and the printing case 4, and is arranged in the printing case. A first elastic body 41 that exerts an elastic force that pushes up 4 upward, and a second elastic body 42 that is arranged between the print case 4 and the outer case 2 and exerts an elastic force that pushes up the outer case 2 upward. In conjunction with the lowering operation of the outer case 2, the ink coating unit 5 is lowered from the ink coating posture for applying ink to the printing surface of the printing unit 3 to a separation position away from the printing surface, and further printing is performed. It is provided with a posture displacement mechanism that swings in a retracted posture that retracts out of the descending region of the unit 3. The outer case 2 is configured to be slidable up and down with respect to the printing case 4 between the upper stamping standby position and the lower stamping position, and under normal conditions, the stamping standby position is due to the elastic force of the second elastic body 42. The position is held in. The elastic force of the first elastic body 41 is set to be larger than the elastic force of the second elastic body 42. Then, the outer case 2 is lowered against the elastic force of the second elastic body 42, and the printing case 4 and the printing unit 3 move downward to the separation position while the ink coating unit 5 moves downward to the separation position. It is characterized in that it is configured to be received and supported so as not to be able to move downward due to the elastic force of.

In a state where the outer case 2 is lowered against the elastic force of the second elastic body 42 and the ink coating unit 5 accompanies the outer case 2 and moves down to the separation position, the outer case 2 is the printing case 4 The case 4 and the printing unit 3 are moved downward toward the stamping posture, and at the same time, the posture displacement mechanism is configured to swing the ink coating unit 5 toward the retracting posture.

The first elastic body 41 is composed of two compression coil type first springs 41a and 41a, and the second elastic body 42 is composed of one compression coil type second spring 42a. Each of the first springs 41a and 41a is housed in a spring receiving frame 36 provided at two peripheral surfaces of the printing case 4, and each of the first springs 41a and 41a is an upper spring receiving frame formed on the upper portion of the spring receiving frame 36. It is arranged between the seat 44 and the lower spring receiving seat 43 formed on the inner surface of the inner case 1. The second spring 42a is arranged between the upper wall of the printing case 4 and the top wall 16 of the outer case 2. The spring receiving frame 36 is fitted and mounted on the lower spring receiving seat 43 so as to be slidable up and down. The stopper piece 45 provided at the lower part of the spring receiving frame 36 is received by the lower spring receiving seat 43, and the printing case 4 is held in the stamping standby posture against the elastic force of the first spring 41a. ..

The ink coating unit 5 includes a pad holder 51 that houses the ink pad 52, and a slide piece 54 that is vertically slidably guided by the guide frame 10 of the inner case 1. The pad holder 51 includes a pair of left and right support arms 53, and the swing shaft 55 provided on the arms 53 can be moved up and down by the guide groove 11 of the pad support frame 9 provided on the inner case 1 and swings. Guided and supported as much as possible. The pad holder 51 and the slide piece 54 are connected via a connecting pin 59 so as to be relatively rotatable and accompany the slide piece 54 so as to be vertically movable. In a state where the pad holder 51 and the slide piece 54 are lowered to the separated position, the pad holder 51 is swung around the connecting pin 59 by the posture displacement mechanism to switch from the separated position to the retracted posture.

The posture displacement mechanism is provided on the left and right support arms 53 to lower the passive cam piece 56 and the lower part of the front wall of the outer case 2 to lower the passive cam piece 56, and to connect the passive cam piece 56 around the connecting pin 59. It is provided with a drive cam piece 66 that is rotated and a holding wall 67 that supports the support arm 53 of the pad holder 51 that has been switched to the retracted posture so that it cannot return and rotate.

In the stamp according to the present invention, the elastic force of the first elastic body 41 arranged between the inner case 1 and the printing case 4 and pushing up the printing case 4 upward is arranged between the printing case 4 and the outer case 2. The printing case 4 and the printing case 4 and the printing case 4 and the printing case 4 and the printing case 4 are moved upward while the outer case 2 is lowered and the ink coating unit 5 is lowered to the separation position so as to be larger than the elastic force of the second elastic body 42 that pushes the outer case 2 upward. The printing unit 3 is received and supported by the first elastic body 41 so as not to be able to move downward. According to such a stamp, after the ink coating unit 5 is moved down to the separation position, the print unit 3 and the print case 4 can be moved down along with the outer case 2, so that the print unit 3 and the print case can be moved down. The timing at which 4 moves downward can always be constant. Further, at the same time that the print case 4 and the print unit 3 move downward from the separated positions, the posture displacement mechanism dynamically swings the ink coating unit 5 toward the retracted posture, so that the ink coating unit 5 Can be reliably retracted and swung at an appropriate timing.

In a state where the ink coating unit 5 accompanies the outer case 2 and moves downward to the separation position, the outer case 2 contacts the print case 4 and moves the case 4 and the print unit 3 downward toward the stamping posture. Therefore, the timing at which the print unit 3 and the print case 4 move downward can always be constant. Further, at the same time that the print case 4 and the print unit 3 move downward from the separated positions, the posture displacement mechanism dynamically swings the ink coating unit 5 toward the retracted posture, so that the ink coating unit 5 Can be reliably retracted and swung at an appropriate timing.

Since the first elastic body 41 and the second elastic body 42 are formed by the compression coil type springs 41a, 41a, and 42a, respectively, the set elastic force is higher than that of the conventional inner cylinder locking body made of a leaf spring. It is exhibited in a stable state for a long period of time, and the variation in elastic force of each spring 41a, 41a, 42a can be reduced. Further, the first springs 41a and 41a are housed in the spring receiving frame 36 provided in the printing case 4, and arranged between the upper spring receiving seat 44 of the frame 36 and the lower spring receiving seat 43 provided in the inner case 1. The spring receiving frame 36 is externally fitted to the lower spring receiving frame 43 so as to be slidable up and down, and the stopper piece 45 provided at the lower part of the spring receiving frame 36 is received by the lower spring receiving seat 43, and the printing case 4 is used. Is able to hold the stamping standby posture against the elastic force of the first spring 41a, so that the stopper piece 45 is engaged and mounted on the lower spring receiving seat 43 in conjunction with assembling the first spring 41a. This makes it possible to reduce the time and effort required to assemble the printing case 4 and the inner case 1 of the first spring 41a. Further, since the printing case 4 can be slid up and down while the spring receiving frame 36 is always engaged with the lower spring receiving seat 43, the printing case 4 is restricted from swinging back and forth and left and right, and the printing unit 3 accurately stamps. be able to.

The ink coating unit 5 is provided with a pad holder 51 for accommodating the ink pad 52, a pair of left and right support arms 53, and a slide piece 54, and the pad holder 51 and the slide piece 54 are supported by the support arms 53. It is connected so that it can be relatively rotated via the connecting pin 59 and can be moved up and down with the connecting pin 59. Further, the swing shaft 55 provided on the outer surface of the support arm 53 is guided and supported by the guide groove 11 of the pad support frame 9 provided on the inner case 1. According to such a stamp, the pad holder 51 and the slide piece 54 are lowered from the stamping standby posture to the separated position by the posture displacement mechanism, and then the pad holder 51 is swung around the connecting pin 59 by the posture displacement mechanism. It is possible to switch from the separated position to the retracted posture.

As described above, in the state where the pad holder 51 is oscillated and displaced, the slide piece 54 holds the separated position and supports the connecting pin 59, and the oscillating shaft 55 is further aligned with the connecting pin 59 along the guide groove 11. Since it swings around the pad holder 51, the pad holder 51 can be swing-displaced in a stable state at all times. Further, since the slide piece 54 only moves up and down between the coating posture and the separated position, the position of the connecting pin 59 when the pad holder 51 starts swinging toward the retracted posture is not deviated and is always constant. The pad holder 51 can be oscillated and displaced according to the locus of.

The posture displacement mechanism includes a passive cam piece 56 provided on the support arm 53, a drive cam piece 66 provided on the outer case 2, and a holding wall 67. According to such a posture displacement mechanism, when the outer case 2 is lowered, the passive cam piece 56 is lowered by the drive cam piece 66, and then the cam piece 56 is rotated by the drive cam piece 66 to retract. The support arm 53 of the pad holder 51 that has been switched to the posture can be supported by the holding wall 67 so that it cannot return and rotate. Therefore, from the time when the pad holder 51 is switched to the retracted posture until the printing unit 3 is pressed against the stamping paper surface, the pad holder 51 does not wobble, and the printing unit 3 can accurately perform the stamping. ..

It is a longitudinal side view of the main part of the stamp which concerns on embodiment of this invention. It is a perspective view of the stamp which concerns on embodiment of this invention. It is a vertical sectional side view of the stamp which concerns on embodiment of this invention. It is a vertical sectional side view of a main part, and shows a state in which an ink coating unit is in close contact with a stamp surface. It is an exploded perspective view of an inner case and an ink application unit. It is an exploded perspective view of a printing unit and a printing case. It is an exploded perspective view of the stamp consisting of a date stamp. It is a longitudinal front view of a stamp composed of a date stamp. FIG. 8 is a cross-sectional view taken along the line AA in FIG. It is an exploded perspective view of the height adjustment mechanism. It is a vertical sectional front view which shows the height adjustment mechanism. It is a longitudinal side view of the stamp which has been switched to the date adjustable state. It is a vertical sectional front view which shows the stamp lock structure. (A) to (e) are operation explanatory views which show the swing operation by a posture displacement mechanism.

1 to 14 show an embodiment in which the stamp according to the present invention is applied to a date stamp. The front / rear, left / right, and up / down in the present invention follow the notation of the crossing arrow shown in FIG. 2 and the front / back, left / right, and up / down in the vicinity of the arrow. In FIGS. 2 to 7, the date stamps are the inner case 1 whose lower end is in contact with the printing paper surface, the outer case 2 which is arranged outside the inner case 1 and is configured to be slidable up and down with respect to the inner case 1. Ink is applied to the printing case 4, which is arranged inside the inner case 1 and is configured to be slidable up and down with respect to the inner case 1, the printing unit 3 supported by the printing case 4, and the printing surface of the printing unit 3. The ink coating unit 5 to be applied, the first elastic body 41 which is arranged between the inner case 1 and the printing case 4 and exerts an elastic force to push up the printing case 4, the printing case 4 and the outer case 2 It is provided with a second elastic body 42 or the like which is arranged between the two and exerts an elastic force for pushing up the outer case 2. Further, the date stamp has a height adjusting mechanism for adjusting the printing surface height of the printing unit 3 and a posture displacement mechanism for lowering the ink coating unit 5 to the separation position and further swinging between the separation position and the retracted posture. It also has a stamp lock structure that regulates or releases the downward slide of the outer case 2. The first elastic body 41 in the present embodiment is composed of two compression coil type springs (first springs 41a and 41a), and the second elastic body 42 is a single compression coil type spring (second spring 42a). ) Consists of.

As shown in FIG. 5, the inner case 1 is composed of a tubular case having an oval cross section with upper and lower surfaces open, an entrance / exit 7 for the ink coating unit 5 is opened in the lower part of the front surface thereof, and an inner window is opened in the upper part of the rear surface. 8 is open. A pair of left and right quadrangular pad support frames 9 are projected above the entrance / exit 7, and a slide piece 54, which will be described later, is slidably guided to the center of a flat wall above both support frames 9. A groove is formed with the guide frame 10 to be formed. A guide groove 11 for guiding and supporting the ink coating unit 5 is formed on the facing surfaces of the pair of pad support frames 9. Further, a pair of guide ribs 12 are formed on the left and right sides of the inner case 1 near the rear of the arc wall, and a pair of left and right lock pieces 13 are formed on the upper part of the inner surface of the arc wall.

In FIG. 7, the outer case 2 is composed of a tubular case having an oval cross section with an open lower surface, and a tubular boss 17 is projected upward at the center of the top wall 16. A guide wall 18 is recessed in the front end wall of the outer case 2, and an outer window 19 is provided near the upper part of the rear end wall of the outer case 2. The outer case 2 is fitted onto the inner case 1 from above, and the guide groove 20 (see FIG. 9) formed on the inner surface of the case is guided by the guide rib 12, so that the outer case 2 can slide up and down in the inner case 1. Guided and supported.

As shown in FIG. 6, the printing unit 3 is assembled on the five adjustment dials 24 and the bridge 25 supported by the frame 23, the printing belt 26 wound around the adjustment dial 24 and the bridge 25, and the upper part of the frame 23. It is equipped with a height adjustment structure, a stamp stand 27, and the like. On the peripheral surface of the printing belt 26, printing blocks for printing the year, month, and day are formed at regular intervals. The stamp base 27 is made of a round plate-shaped plastic molded product that opens vertically, and a rubber fixed printing body 28 is fixed to the lower surface side thereof. An entrance / exit 29 for a print block is opened in the center of the front and rear of the fixed printing body 28, and fixed printing surfaces such as a receipt, an inspection, and a sealer's name are formed in front of and behind the same opening 29. Vertically long slide frames 30 having a U-shaped cross section are formed on the left and right sides of the stamp base 27.

The print case 4 has a square basic cross section, and a dial groove 32 for exposing the adjustment dial 24 is formed on the upper part of the front and rear walls thereof, and a guide is formed on the lower side of the dial groove 32 on the front side. A pair of guide frames 34 having a U-shaped cross section for guiding the slide wall 33 projecting from the rear side of the wall 18 are formed (see FIGS. 6 and 9). U-shaped grooves 35 are notched in the upper half of the left and right walls of the printing case 4, and spring receiving frames 36 having a U-shaped cross section are provided on the front left and right sides of the grooves 35. Further, a guide vertical frame 38 for guiding and supporting the dial cover 37 so as to be vertically slidable is provided on the rear left and right sides of the groove 35, and a vertical guide rib 39 for the slide frame 30 of the stamp base 27 is provided on the front side of the guide vertical frame 38. (See Fig. 9).

The print unit 3 is mounted on the print case 4 from above, the stamp base 27 is mounted on the print case 4 from below, the slide frame 30 is slidably guided by the vertical guide rib 39, and the dial cover 37 is rearward. By engaging with the guide vertical frame 38 from the side, the printing unit 3 and the printing case 4 can be integrated. The dial cover 37 covers the outer surface of the adjustment dial 24 as shown in FIG. 3, and opens the upper closing position for closing the inner surface of the outer window 19 and the inner window 8 and the outer window 19 as shown in FIG. , Can slide up and down between the lower open positions that expose the adjustment dial 24. In order to slide the stamp face 27 up and down in conjunction with the vertical slide of the dial cover 37, the engagement protrusion 30a of the slide frame 30 is attached to the dial cover 37 in a state where the stamp base 27 and the dial cover 37 are assembled to the print case 4. The slide frame 30 and the dial cover 37 are movably connected to each other by engaging with the engaging recess 37a of the above (see FIG. 12). That is, the dial cover 37 at the closed position and the slide frame 30 of the stamp base 27 at the stamping position are engaged and connected so as to be slidable together. As a result, the stamp face 27 has a usage posture in which the lower end of the print belt 26 faces the entrance / exit 29 (state shown in FIG. 3) and a date adjustment posture in which the stamp stand 27 moves downward to the lower side of the print case 4 (FIG. 12). Can slide up and down between the states shown).

With the pair of first springs 41a and 41a attached to the spring receiving frame 36 of the printing case 4 in which the printing unit 3 is assembled, the printing case 4 is assembled to the inner case 1 from above, and these first springs 41a are compressed and deformed. However, the lower part of the spring receiving frame 36 is fitted and mounted on the lower spring receiving seat 43 on the inner surface of the inner case 1. Further, when the printing case 4 is pushed down against the elastic force of the first spring 41a, the stopper piece 45 (see FIGS. 6 and 7) at the lower end of the spring receiving frame 36 gets over the lower spring receiving seat 43. Since it is received by the lower surface thereof, the print case 4 can be slid up and down with respect to the inner case 1, but can be connected inseparably. The upper end of the first spring 41a is received by the upper spring receiving seat 44 at the upper end of the spring receiving frame 36. The second spring 42a is attached to the upper part of the height adjusting structure in this state, the outer case 2 is attached to the inner case 1 from above, and the slide wall 33 on the guide wall 18 side described above is guided by the guide frame 34. By doing so, the outer case 2 can be temporarily assembled to the inner case 1. As described above, the print case 4 is supported by the inner case 1 via the first spring 41a, and the outer case 2 is supported by the print case 4 via the second spring 42a. The first spring 41a and the second spring 42a are each formed of a compression coil spring.

In FIG. 5, the ink coating unit 5 includes a round plate-shaped pad holder 51, an ink pad 52 housed in the holder 51, a pair of left and right support arms 53 provided on the front portion of the pad holder 51, and an inner case. It is provided with a slide piece 54 that is vertically slidably guided by the guide frame 10 of 1. A swing shaft 55 is projected on the outer surfaces of the left and right support arms 53, and a passive cam piece 56 constituting a posture displacement mechanism is formed on the lower portion of the rear surface of each support arm 53. The slide piece 54 is made of a quadrangular plastic molded product, slide grooves 57 are formed on the left and right sides thereof, and a connecting boss 58 is integrally formed at the lower end front portion of the slide piece 54. The support arm 53 and the connecting boss 58 are relatively rotatably connected via a connecting pin 59 supported by the pair of supporting arms 53. The ink coating unit 5 is integrated with the inner case 1 by engaging the slide groove 57 of the slide piece 54 in this state with the guide frame 10 and further fitting the swing shaft 55 into the guide groove 11 of the pad support frame 9. Can be changed. On the lower surface of the pad holder 51, a cover 51b that slides the ink replenishment port 51a back and forth to open and close is provided.

As shown in FIG. 1, the guide groove 11 has a vertical groove 62 that allows the pad holder 51 to move downward from the ink application posture to the separation position, and the pad holder 51 retracts from the separation position around the connecting pin 59. It includes an arc groove 63 that allows movement, and an assembly groove 64 (see FIG. 4) that facilitates assembly of the swing shaft 55 to the guide groove 11. The support arm 53 is used to lower the ink coating unit 5 supported by the inner case 1 from the ink coating posture (stamping standby posture) to the separation position, and further to swing between the separation position and the retracting posture. A posture displacement mechanism is provided between the outer case 2 and the outer case 2.

In FIGS. 1 and 4, the posture displacement mechanism is switched between the passive cam pieces 56 provided on the left and right support arms 53, the left and right drive cam pieces 66 provided under the guide wall 18 of the outer case 2, and the retracted posture. It is composed of a holding wall 67 or the like that supports the support arm 53 of the pad holder 51 so that it cannot return and rotate. A cam recess 68 for receiving the drive cam piece 66 is formed on the upper side of the passive cam piece 56, and a cam recess 69 for receiving the passive cam piece 56 is formed on the lower side of the drive cam piece 66. Further, below the passive cam piece 56, a return cam piece 70 for returning and rotating the support arm 53 is provided. When the ink coating unit 5 is switched to the ink coating posture, the lower step portion 71 of the support arm 53 receives the return cam piece 70, thereby causing the outer case 2 to have the first spring 41a and the second spring 42a. The position is held in the stamp standby posture against the pushing force of. That is, the step portion 71 of the support arm 53 also serves as a stopper for preventing the outer case 2 from being pulled out upward. On the upper side of the drive cam piece 66, a final stage cam piece 72 that swings the protruding end surface of the support arm 53 is formed.

In order to accompany the downward movement of the outer case 2 at the time of stamping and to move only the ink coating unit 5 downward, the total elastic force of the two first springs 41a and 41a arranged in parallel is applied. The elastic force of the two springs 42a is set to be larger than the elastic force.

In FIGS. 10 and 11, the height adjusting mechanism includes a screw boss 74 that is engaged and mounted on the upper end of the frame 23 of the printing unit 3, an adjusting screw body 75 that is screwed into the boss 74, and a top wall 16 of the outer case 2. It is provided with a spring cradle 76 supported by. A connecting frame 77 that engages with the upper inner surface of the printing case 4 is overhanging at the lower end of the screw boss 74, and elastic engaging claws 78 provided on the left and right sides of the frame 77 engage with the connecting groove 79 of the frame 23. By fitting, the screw boss 74 can be integrated with the printing unit 3 and the printing case 4. A circular operation head 80 is provided on the upper portion of the adjusting screw body 75, and a one-character-shaped operation groove 81 is formed in the head 80. The spring cradle 76 includes a tubular boss portion 82 that supports the screw boss 74 from the outer surface, a case support frame 83 that projects from the lower end of the boss 82 in the front-rear and left-right directions and engages with the upper outer surface of the printing case 4. A stopper claw 84 projecting from the left and right peripheral surfaces of the cylinder boss portion 82 is integrally provided.

As shown in FIG. 11, the lower surface of the operation head 80 described above is rotatably engaged with the inner surface of the cylinder boss portion 82 of the spring cradle 76. Therefore, when the adjusting screw body 75 is rotated, the printing unit 3 moves up or down, so that the heights of the stamp surfaces of the printing belt 26 and the fixed printing body 28 can be adjusted. The stopper claw 84 in the stamping standby state is received by the top wall 16 of the outer case 2. When the printing unit 3 with the height adjustment mechanism is mounted on the printing case 4, the engaging projections 83a (see FIG. 6) provided in the front and rear of the case support frame 83 engage the front and rear walls of the printing case 4. It is engaged with the hole 4a.

In FIG. 7, the stamp lock structure is provided on the inner surface of the upper end of the inner case 1, the lock body 87 assembled around the tubular boss 17 of the outer case 2, the operation cap 88 for switching the lock body 87 between the lock posture and the unlock posture. It is composed of the lock piece 13. The lock body 87 integrally includes a ring portion 89 having a C-shaped plan view and a vertically long lock shaft 90 formed on the left and right peripheral surfaces of the ring portion 89, which is fitted and mounted on the tubular boss 17 of the outer case 2. I have. The lock body 87 can be assembled to the outer case 2 by externally fitting the ring portion 89 to the cylinder boss 17 while inserting the lock shaft 90 into the case through the switching groove 91 formed in the top wall 16 of the outer case 2. it can. An inner wall 92 (see FIG. 3) that fits outside the tubular boss 17 of the outer case 2 is provided on the inner surface of the operation cap 88, and the upper end of the lock shaft 90 is provided at two locations on the left and right between the cap peripheral wall and the inner wall 92. An operating recess 94 (see FIG. 8) that engages with the passive shaft 93 is formed. Further, an engaging groove 95 is formed near the upper end of the lock shaft 90 to engage with the lock piece 13 and hold the outer case 2 in the stamping posture (stamping surface adjusting posture).

When the stamp lock structure is switched to the unlocked posture, as shown in FIG. 9, the lower end of the lock shaft 90 is displaced laterally in the circumferential direction of the lock piece 13, so that the outer case 2 is the lock piece 13 You can move up and down freely without being disturbed by. Further, in the state where the stamp lock structure is switched to the lock posture, the lower end of the lock shaft 90 is located directly above the lock piece 13, so that even if the outer case 2 is pushed down, the lower end of the lock shaft 90 is locked. Since it is received by the piece 13, the outer case 2 cannot be pushed down. Further, when the stamping lock structure is switched to the unlocking posture and the stamping lock structure is switched to the locking posture while the outer case 2 is pressed to the stamping posture as shown in FIG. 12, the lock shaft is displayed as shown in FIG. Since the engaging groove 95 of 90 engages with the lock piece 13, the outer case 2 can be held in the stamped posture. In this state, the adjustment dial 24 can be exposed to the inside of the inner window 8 by pushing down the dial cover 37 to open the inner window 8 and the outer window 19, and at the same time, the stamp stand 27 covers the dial cover. Since the print belt 26 is retracted below the print belt 26 along with the downward movement of the 37, the date can be adjusted by rotating each adjustment dial 24.

The operation of the posture displacement mechanism when the outer case 2 moves downward from the stamping standby posture to the separated position and the ink coating unit 5 swings from the lowered region of the printing unit 3 toward the retracted posture of the front outer surface is as follows. explain. When the outer case 2 is in the stamping standby posture, the ink pad 52 of the ink coating unit 5 is in close contact with the printing belt 26 and the fixed printing body 28 as shown in FIGS. 3, 4, and 14 (a). ing. When the outer case 2 starts to move downward from this state, the drive cam piece 66 provided on the guide wall 18 of the case 2 pushes down the passive cam piece 56 as shown in FIG. 14B, so that the pad The holder 51 and the slide piece 54 move downward together with the outer case 2 along the vertical groove 62 of the guide groove 11 to a separated position, and the lower end of the swing shaft 55 is received by the upper end of the arc groove 63. The lowering distance C of the pad holder 51 at this time is shown in FIG.

When the outer case 2 is continuously lowered, the drive cam piece 66 rotates the passive cam piece 56 around the connecting pin 59 as shown in FIG. 14C, so that the entire ink coating unit 5 is separated from the separated position. It can be swung toward the outside of the entrance / exit 7 toward the retracted posture. However, at the separation position, the lower end of the swing shaft 55 is received by the arc groove 63, and the vertical position of the connecting pin 59 does not change even if the support arm 53 swings and displaces, so that the slide piece 54 moves from the separation position. It does not descend downward and supports the connecting pin 59 while remaining in the separated position. As shown in FIGS. 14 (c) to 14 (d), in the process in which the ink coating unit 5 swings from the ink coating posture to the retracted posture, the drive cam piece 66 pushes down the passive cam piece 56. After finishing, the protruding end surface of the support arm 53 is swung by the final stage cam piece 72 to switch to the retracted posture. In the state where the ink coating unit 5 is switched to the retracted posture, the protruding end surface of the support arm 53 is received by the holding wall 67 of the guide wall 18, so that the ink coating unit 5 does not swing any more. As shown in FIG. 14E, only the outer case 2 slides downward so that the printing unit 3 can be stamped on the paper.

When the pressing force of the outer case 2 is released after the stamping by the printing unit 3 is completed, the outer case 2 receives the elastic force of the first spring 41a and slides upward to return to the stamping standby posture. In the process, the drive cam piece 66 engages with the cam recess 68, swings the support arm 53 counterclockwise around the connecting pin 59, and moves the ink coating unit 5 toward the ink coating posture. Swing. Further, the return cam piece 70 comes into contact with the step portion 71 to forcibly return the ink coating unit 5 to the ink coating posture. The second spring 42a expands and deforms after the stopper piece 45 of the spring receiving frame 36 is received by the lower surface of the lower spring receiving seat 43, and holds the printing unit 3 in the coating standby posture.

As described above, in the stamp according to the first embodiment, since the first spring 41a and the second spring 42a are formed by the compression coil spring, the set spring force is set as compared with the conventional inner cylinder locking body made of a leaf spring. Can be demonstrated in a stable state for a long period of time. The elastic force of each of the springs 41a and 42a can also be reduced. Further, since the total elastic force of the two first springs 41a is set to be larger than the elastic force of the second spring 42a, while the ink coating unit 5 accompanies the outer case 2 and moves downward to the separation position, The printing unit 3 to be moved downward is received by the first spring 41a having a large elastic force, and the unit 3 can be reliably prevented from moving downward.

In the state where the ink coating unit 5 is moved downward to the separated position, the outer case 2 is in contact with the print case 4, and thereafter, the print unit 3 and the print case 4 can be moved downward along with the outer case 2. Therefore, the timing at which the print unit 3 and the print case 4 move downward can always be fixed. Further, at the same time that the print case 4 and the print unit 3 move downward from the separated positions, the posture displacement mechanism dynamically swings the ink coating unit 5 toward the retracted posture, so that the ink coating unit 5 Can be reliably retracted and swung at an appropriate timing.

The first spring 41a is arranged between the spring receiving frame 36 provided on the peripheral surface of the printing case 4 and the lower spring receiving seat 43 provided on the inner case 1, and the spring receiving frame 36 is further placed on the lower spring receiving seat 43 with respect to the lower spring receiving frame 43. The stopper piece 45 provided at the lower part of the spring receiving frame 36 is received by the lower spring receiving seat 43, and the printing case 4 is put into the stamping standby posture against the elastic force of the first spring 41a. Since it can be held, the stopper piece 45 can be engaged and mounted on the lower spring receiving seat 43 in conjunction with the assembly of the first spring 41a, and the inner case 1 of the printing case 4 and the first spring 41a The labor of assembling the spring can be greatly reduced. Further, since the printing case 4 can be slid up and down while the spring receiving frame 36 is always engaged with the lower spring receiving seat 43, the printing case 4 is restricted from swinging back and forth and left and right, and the printing unit 3 accurately stamps. be able to.

The ink coating unit 5 includes a pad holder 51 for accommodating the ink pad 52, a pair of left and right support arms 53, and a slide piece 54, and the pad holder 51 and the slide piece 54 are supported by the support arms 53. It is connected so that it can be relatively rotated via the connecting pin 59 and can be moved up and down with the connecting pin 59. Further, the swing shaft 55 provided on the outer surface of the support arm 53 is guided and supported by the guide groove 11 of the pad support frame 9 provided on the inner case 1. According to such a stamp, the pad holder 51 and the slide piece 54 are lowered from the stamping standby posture (painting posture) to the separated position by the posture displacement mechanism, and then the pad holder 51 is shaken around the connecting pin 59 by the posture displacement mechanism. It is possible to switch from the separated position to the retracted posture by moving the operation.

As described above, in the state where the pad holder 51 is oscillated and displaced, the slide piece 54 holds the separated position and supports the connecting pin 59, and the oscillating shaft 55 is further aligned with the connecting pin 59 along the guide groove 11. Since it swings around the pad holder 51, the pad holder 51 can be swing-displaced in a stable state at all times. Further, since the slide piece 54 only moves up and down between the coating posture and the separated position, the position of the connecting pin 59 when the pad holder 51 starts swinging toward the retracted posture is not deviated and is always constant. The pad holder 51 can be oscillated and displaced according to the locus of. Further, since the pad holder 51 is swingably supported around the connecting pin 59 by the slide piece 54 that has been moved downward to the separated position, the swing radius of the pad holder 51 can be reduced.

Since the posture displacement mechanism includes the passive cam piece 56 provided on the support arm 53, the drive cam piece 66 provided on the outer case 2, and the holding wall 67, the passive cam is operated when the outer case 2 is lowered. After the piece 56 is lowered by the drive cam piece 66, the cam piece 56 is rotated by the drive cam piece 66, and the support arm 53 of the pad holder 51 switched to the retracted posture is returned and rotated by the holding wall 67. Can be supported impossible. Therefore, the pad holder 51 does not wobble until the pad holder 51 is switched to the retracted posture and the printing unit 3 is pressed against the printing paper surface, and the printing unit 3 can accurately perform the printing.

A dial cover 37 that covers the outer surface of the adjustment dial 24 is provided on the back surface of the print case 4 so as to be slidable up and down, and the upper closing position where the cover 37 covers the outer surface of the adjustment dial 24 and the lower opening that exposes the adjustment dial 24. The pair of slide frames 30 provided on the stamp base 27 are guided and supported by the vertical guide ribs 39 provided on the printing case 4 so that they can slide up and down between the positions, and the stamp base 27 is supported by the printing belt 26. Since the dial cover 37 and the slide frame 30 can be slidably engaged and connected to each other, the dial cover 37 and the slide frame 30 can be slid up and down between the lower adjustment position and the stamping position where the stamp base 27 intersects the printing belt 26. By sliding the dial cover 37 open and close, the stamp base 27 can be moved between the adjustment position and the stamping position at the same time, so that the date change work of the print belt 26 can be easily performed. Further, in the normal state, the outer surface of the adjustment dial 24 can be covered with the dial cover 37, so that the fingertips come into contact with the adjustment dial 24 and the print belt 26 at the time of stamping, and the stamp surface of the print belt 26 is surely displaced. Can be prevented. In addition, it is possible to eliminate dust from adhering to the printing belt 26, and it is possible to improve the appearance impression of the stamp.

The stamp of the present invention can be applied to an inspected stamp, a receipt stamp, etc. in addition to the date stamp. The first spring 41a and the second spring 42a may be a coil spring made of a non-ferrous metal, a coil spring made of a polymer material, or the like, in addition to the coil spring made of spring steel.

1 Inner case 2 Outer case 3 Printing unit 4 Printing case 5 Ink coating unit 9 Pad support frame 10 Guide frame 11 Guide groove 24 Adjustment dial 26 Printing belt 27 Stamp stand 36 Spring receiving frame 41 1st elastic body 41a 1st spring 42 No. 2 Elastic body 42a Second spring 43 Lower spring seat 44 Upper spring seat 45 Stopper piece 51 Pad holder 52 Ink pad 53 Support arm 54 Slide piece 55 Swing shaft 56 Passive cam piece 59 Connecting pin 66 Drive cam piece 67 Holding wall

Claims (5)

A tubular inner case (1) whose lower end is in contact with the stamping paper surface,
An outer case (2) that is arranged outside the inner case (1) and is configured to be slidable up and down with respect to the inner case (1).
A printing case (4) arranged inside the inner case (1) and slidable up and down with respect to the inner case (1).
The printing unit (3) supported by the printing case (4) and
The ink coating unit (5), which is supported by the inner case (1) so as to be slidable up and down and swing back and forth, and coats the printing surface of the printing unit (3)
A first elastic body (41), which is arranged between the inner case (1) and the printing case (4) and exerts an elastic force to push up the printing case (4) upward.
A second elastic body (42) that is arranged between the printing case (4) and the outer case (2) and exerts an elastic force that pushes the outer case (2) upward.
In conjunction with the lowering operation of the outer case (2), the ink coating unit (5) is lowered from the ink coating posture of applying ink to the printing surface of the printing unit (3) to a separation position away from the printing surface. A posture displacement mechanism that operates and swings to a retracted posture that retracts out of the descending region of the printing unit (3).
With
The outer case (2) is configured to be slidable up and down with respect to the printing case (4) between the upper stamping standby position and the lower stamping position, and is normally a second elastic body (42). The position is held in the stamp standby position by elastic force,
The elastic force of the first elastic body (41) is set to be larger than the elastic force of the second elastic body (42).
The printing case (4) and the printing unit (4) and the printing unit (4) while the outer case (2) is lowered against the elastic force of the second elastic body (42) and the ink coating unit (5) moves downward to the separation position. A stamp characterized in that 3) is configured to be received and supported so as not to be able to move downward due to the elastic force of the first elastic body (41). In a state where the outer case (2) is lowered against the elastic force of the second elastic body (42) and the ink coating unit (5) accompanies the outer case (2) and moves down to the separation position. , The outer case (2) comes into contact with the printing case (4), and the case (4) and the printing unit (3) are moved downward toward the marking position, and at the same time, the posture displacement mechanism moves the ink coating unit (5). The stamp according to claim 1, wherein the) is swung toward the retracted position. The first elastic body (41) is composed of two compression coil type first springs (41a and 41a).
The second elastic body (42) is composed of one compression coil type second spring (42a).
Each of the first springs (41a and 41a) is housed in spring receiving frames (36) provided at two peripheral surfaces of the printing case (4), and each of the first springs (41a and 41a) is a spring receiving frame (36). ), And the lower spring seat (43) formed on the inner surface of the inner case (1).
The second spring (42a) is arranged between the upper wall of the printing case (4) and the top wall (16) of the outer case (2).
The spring receiving frame (36) is externally fitted to the lower spring receiving seat (43) so as to be slidable up and down.
The stopper piece (45) provided at the bottom of the spring receiving frame (36) is received by the lower spring receiving seat (43), and the printing case (4) stands in a stamping standby posture against the elastic force of the first spring (41a). The seal according to claim 1 or 2, which is configured to be retained in. The ink coating unit (5) has a pad holder (51) for accommodating the ink pad (52) and a slide piece (54) that is vertically slidably guided by the guide frame (10) of the inner case (1). I have
The pad holder (51) is provided with a pair of left and right support arms (53), and the swing shaft (55) provided on the same arm (53) is a pad support frame (9) provided on the inner case (1). It is guided and supported by a guide groove (11) so that it can move up and down and swing.
The pad holder (51) and the slide piece (54) are connected via a connecting pin (59) so as to be relatively rotatable and accommodating so as to be movable up and down.
In a state where the pad holder (51) and the slide piece (54) are lowered to the separated position, the pad holder (51) is swung around the connecting pin (59) by the posture displacement mechanism to retract from the separated position. The stamp according to any one of claims 1 to 3 for switching to a posture. The posture displacement mechanism lowers the passive cam piece (56) provided on the left and right support arms (53) and the passive cam piece (56) provided on the lower part of the front wall of the outer case (2), and the passive cam. The drive cam piece (66) that rotates the piece (56) around the connecting pin (59) and the support arm (53) of the pad holder (51) that has been switched to the retracted posture are supported so that they cannot return and rotate. The seal according to any one of claims 1 to 4, which includes a holding wall (67).

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