JP5057830B2 - Rubber stamp - Google Patents

Description

  The present invention relates to a rubber stamp provided with a lift frame that can hold a stamp surface of a rubber printed body in a non-use state in a state of being floated away from the paper surface, and more particularly, to a rubber stamp with a strip shape elongated in a strip shape.

  This type of rubber stamp is known, for example, from Patent Document 1. There, a case that also serves as a grip, a print body holder and lift frame that are guided and supported by the case so as to freely move in and out, a cover that closes the opening surface of the case, and a print body holder and a lift frame that are disposed between the case and the case. A rubber stamp is composed of two types of compression coil springs, a rubber print body and an ink occlusion body housed in a print body holder. The lift frame is formed of a press fitting made of a metal plate material, and the lower end edge of the lift frame comes into contact with the paper surface to hold the stamp surface of the rubber print body in a state of being lifted away from the paper surface. At the time of printing, the case and the print body holder move downward with respect to the lift frame, so that the rubber print body can be pressed against the paper surface for printing.

  Similar rubber stamps can be found in Patent Documents 2 and 3. In Patent Document 2, the lift frame is formed of a plastic molded product, and a spring portion having a semicircular cross section is integrally formed at the upper end thereof. In patent document 3, the spring of a bellows structure is integrally formed in the case which accommodates a rubber printing body.

Japanese Utility Model Publication No. 55-38678 (column 2, lines 15-36, FIG. 3) Japanese Utility Model Publication No. 48-80608 (page 3, lines 2-8, Fig. 1) Japanese Utility Model Publication No. 53-33416 (page 1, lines 14-18, Fig. 2)

  The rubber stamp of Patent Document 1 is used to print the code number, product number, corporate name, or account item of a product, but it is necessary to prepare a dedicated component for each different width of the stamp face In addition, the overall cost is high because of the large number of components. Specifically, it is necessary to prepare a case, a printing body holder, a lift frame, a cover, a rubber printing body, and an ink storage body according to the difference in the width of the printing surface. The rubber stamps of Patent Documents 2 and 3 have similar problems. Further, in the rubber stamp of Patent Document 1, since the case and the print body holder are levitated and supported by a compression coil-shaped spring arranged at the center of the upper surface of the print body holder, the print holder is likely to wobble from front to back and from side to side at the time of printing. In addition to the fact that the stamp surface is elongated in a strip shape, the print density tends to vary between the left and right sides of the stamp surface.

  In the rubber stamp of Patent Document 2, since the spring portion is formed integrally with the lift frame, the number of components of the rubber stamp can be reduced. However, since it is necessary to engage the spring portion formed in the indented shape with the spring receiving seat formed in the case wall indentation, it takes time to assemble the lift frame to the case. The stamped surface of the rubber print is floated and supported by the spring elasticity when the spring part elastically deformed at the time of stamping returns to the free state, but the spring part that was semicircular in cross section at the time of the free state has a large U-shaped section at the time of stamping. Since it is elastically deformed, there is a problem in durability such that the spring part is easily creep-deformed and the spring elasticity gradually decreases during long-term use. The space that the lift spring occupies is large, and the rubber stamp is easy to enlarge. The rubber stamp of Patent Document 3 has the same problem.

  An object of the present invention is to provide a rubber stamp that can be used in common even if the widths of the marking surfaces are different, and that the manufacturing cost can be reduced accordingly. An object of the present invention is to provide a rubber stamp that can reduce the number of components of a rubber stamp, and that can easily and reliably assemble each component, and can reduce the manufacturing cost as a whole. An object of the present invention is to provide a rubber stamp that can be compactly integrated while minimizing the space occupied by the lift spring. An object of the present invention is to provide a rubber stamp suitable for use as a rubber stamp of a continuous stamping type having a strip-shaped elongated marking surface.

  The rubber stamp of the present invention includes a main case 1 having an ink replenishing opening 2, a lid 3 for opening and closing the opening 2, a printing body holder 4 for housing a rubber printing body 6, and left and right side surfaces of the main case 1. And a lift frame 9 that is disposed under the side frame 5 and floats and holds the marking surface 6 a of the rubber print body 6, and a lift frame 9. The lift spring 8 and the lift frame 9 are formed integrally with the side frame 5, and the lift frame 9 is guided and supported by the guide portions 22 provided on both sides of the print body holder 4 so as to be slidable up and down.

  The lift spring 8 is composed of at least one spring arm 8 a and 8 b that are continuous with the side wall of the side frame 5. The spring arms 8a and 8b are configured to be elastically deformable in a deformation space that matches the thickness dimension of the side wall of the side frame 5.

  A connecting frame 14 that is inserted into and engaged with the inner surface of the opening of the print body holder 4, and an engagement claw 16 that is press-fitted into engagement portions 23 provided on both sides of the print body holder 4. Is provided. Furthermore, engagement structures 15 and 26 that engage with each other are provided on the opposing surfaces of the side wall 12 and the side frame 5 of the main case 1. Thus, the connection frame 14 and the print body holder 4 and the engagement claw 16 and the engagement portion 23 are engaged and connected, the main case 1 and the rubber print body 6 are integrated, and the engagement structures 15 and 26 are engaged and connected. Then, the side wall 12 and the main case 1 are integrated.

  On both sides of the print body holder 4, shielding portions 30 that cover the outer surface of the lift spring 8 are provided.

  In the present invention, the main case 1 and the lid 3, the printing body holder 4 that accommodates the rubber printing body 6, the left and right side frames 5, the lift spring 8 that lifts and holds the marking surface 6 a of the rubber printing body 6, the lifting frame 9, etc. Since the rubber stamp is formed and the lift spring 8 and the lift frame 9 are formed integrally with the side frame 5, the number of components of the rubber stamp can be reduced, and in addition to the plurality of types of rubber stamps having different width dimensions of the stamp surface 6a, By using the side frame 5, the lift spring 8, and the lift frame 9 in common, the manufacturing cost of the rubber stamp can be reduced accordingly.

  Further, a lift spring 8 and a lift frame 9 provided integrally with the side frame 5 are disposed on both the left and right sides of the main case 1, and both ends of the rubber print body 6 are floated and held by the lift frame 9, and the lift frame 9 is further attached to the print body. Since the guide portions 22 provided on both sides of the holder 4 are slidably guided and supported, the print body holder 4 can be used at the time of printing as compared with the conventional floating structure in which a compression coil spring is arranged at the center of the upper surface of the print body holder. It is possible to reliably prevent wobbling from front to back and from side to side, and to perform stamping in a stable state at all times, and to suppress variations in print density at both ends of the marking surface 6a. In particular, it is possible to suppress variations in print density at both ends in the longitudinal direction of a rubber stamp having a long and narrow marking surface 6a.

  The lift spring 8 is constituted by at least one spring arm 8 a, 8 b that is continuous with the side wall of the side frame 5, and the arm 8 a, 8 b can be elastically deformed in a deformation space that matches the thickness dimension of the side frame 5. Thus, the lift spring 8 can be elastically deformed in a smaller space, and the lift spring 8 does not protrude from the side wall outer surface of the side frame 5 in the elastically deformed state. As a result, the space occupied by the lift spring 8 in the rubber stamp can be minimized, and the entire rubber stamp can be made smaller and more compact.

  The connecting frame 14 provided in the main case 1 is inserted into and engaged with the inner surface of the opening of the print body holder 4, and the engagement claw 16 is engaged with the engaging portion 23 of the print body holder 4, thereby the main case 1 and the print body. When the holder 4 is integrated, the main case 1 and the print body holder 4 can be securely integrated by engaging the opening wall of the print body holder 4 from both inside and outside with the connecting frame 14 and the engaging claw 16. Further, by engaging the engaging structures 15 and 26 provided on the opposing surfaces of the side wall 12 and the side frame 5 of the main case 1, the side frame 5 is integrated with the main case 1, and the lift spring 8 and the lift frame are integrated. 9 can be integrated with the main case 1 and the printing body holder 4 so that each component can be assembled easily and securely without any mistakes, and the number of component parts is reduced. Can be reduced. The main case 1 that is the main structure, the print body holder 4 and both side frames 5 and 5 can be firmly integrated, so that the main case 1 and the like can be prevented from wobbling at the time of stamping, and the stamping is always in a stable state. Can be done.

  By providing shielding portions 30 on both sides of the print body holder 4 and covering the outer surface of the lift spring 8 with these shielding portions 30, the lift spring 8 is prevented from being exposed on the surface of the rubber stamp, and the rubber stamp The appearance can be made simple and clean. Furthermore, it is possible to reliably prevent the dust from entering the lift spring 8 and its peripheral portion by the shielding portion 30, so that the deformation operation of the lift spring 8 and the sliding operation of the lift frame 9 can be eliminated. .

Embodiment 1 FIGS. 1 to 5 show an embodiment of a rubber stamp according to the present invention. 1 and 2, the rubber stamp is attached to the main case 1, a cover (lid body) 3 that opens and closes an ink replenishing opening 2 provided on the front surface of the main case 1, and a lower portion of the main case 1. The printing body holder 4, a pair of left and right side frames 5, 5 attached to the left and right side surfaces of the main case 1, a rubber printing body 6 and an ink storage body 7 accommodated in the printing body holder 4, and the side frames 5, 5. The lift spring 8 and the lift frame 9 are provided at the lower part. The stamp surface 6a of the rubber printed body 6 is formed in a strip shape that is long in the left-right direction. In many cases, a stamp portion for stamping only one line of a number string or character string is formed on the stamp surface 6a.

  The main case 1 includes a rectangular main surface wall 11, a pair of left and right side walls 12 continuous on both sides of the main surface wall 11, reinforcing ribs 13 projecting from the inner surface of the main surface wall 11, and the main surface wall 11 and both side walls 12. It consists of a plastic molded product integrally provided with a connecting frame 14 having a U-shaped cross section formed continuously in a stepped shape at the lower end. A vertical rectangular engagement hole (engagement structure) 15 for assembling the side frame 5 is opened at the upper part of the side walls 12, and downward engagement claws 16 are formed at the lower ends of the side walls 12. The reinforcing rib 13 also serves as a pressing frame that prevents the ink storage body 7 from being lifted (see FIG. 3).

  The cover 3 is made of a plastic molded product with a front wall 3a and an upper wall 3b and having an inverted L-shaped longitudinal section, and a connecting wall 18 is formed in a stepped shape at the lower end thereof. When the cover 3 is attached to the main case 1, the upper surface opening of the main case 1 and the opening 2 on the front surface can be closed by the front wall 3a and the upper wall 3b. The main case 1 and the cover 3 in this state are rubber stamps. It functions as a large grip. In order to prevent the cover 3 from being unnecessarily opened, a protrusion 19a and a recess 19b that engage with each other are formed on the upper portion of the main wall 11 and the rear surface of the upper wall 3b of the cover 3. On the upper surface of the upper wall 3 b of the cover 3, a stamp display card 20 that matches the printed content of the rubber printed body 6 is attached.

  The print body holder 4 is made of a plastic product in the form of a horizontally long rectangular frame having an open top and bottom surface, and a guide portion 22 is formed on the outer surface of the left and right walls to guide and support the lift frame 9 slidably up and down. An engagement step portion (engagement portion) 23 that engages with the previous engagement claw 16 is formed on the upper portion of the outer surface. The guide portion 22 includes a pair of front and rear guide grooves 22a. On the left and right outer surfaces of the front wall of the print body holder 4, rib-shaped indexes 24 representing the print area are formed. A rubber printing body 6 is incorporated in the lower part of the inner surface of the printing body holder 4, and an ink storage body 7 is incorporated on the upper surface side thereof. The rubber printed body 6 is formed of a porous rubber capable of continuous printing, and the ink occluding body 7 is formed of a plastic hard mat having continuous bubbles, and is fixedly bonded to the print body holder 4 respectively.

  The side frame 5 is made of a plastic molded product having a U-shaped cross section, and a pair of claws (engagement structures) 26 that engage with the previous engagement holes 15 project laterally from the upper part of the inner surface. The lower part of the side frame 5 is formed of only the front and rear walls with the side walls omitted, and the lift spring 8 is formed integrally with the side walls between the front and rear walls, and further, the lift frame 9 is continuously provided below the lift spring 8. Are integrally formed.

  As shown in FIG. 4, the lift spring 8 in this embodiment is composed of a pair of front and rear spring arms 8 a that are continuous with the side walls of the side frame 5, and the projecting arc surfaces of the spring arms 8 a are front and rear. It arrange | positions in the state which opposes. The length of each spring arm 8a is set sufficiently larger than the up / down stroke of the lift frame 9 (projection dimension C of a leg surface 28 described later), and the whole is elastically deformed by bending as shown by an imaginary line. As a result, creep deformation can be reliably prevented during long-term use. Further, each spring arm 8a is elastically deformed in a deformation space corresponding to the thickness dimension of the side wall of the side frame 5, and the elastically deformed spring arm 8a does not protrude from the outer surface of the side frame 5. The space occupied by the lift spring 8 can be minimized, and the rubber stamp can be made smaller and more compact. Note that the thickness dimension of each spring arm 8 a is slightly smaller than the thickness dimension of the side wall of the side frame 5. A rail 27 that engages with the guide groove 22a of the guide portion 22 is formed in the front and rear of the lower half portion of the lift frame 9. At the time of marking, the leg surface 28 at the lower end surface of the lift frame 9 contacts the paper surface.

  The rubber stamp configured as described above is configured such that the connecting frame 14 of the main case 1 is inserted and engaged with the inner surface of the print body holder 4 from the upper surface side of the print body holder 4 in which the rubber print body 6 and the ink storage body 7 are incorporated. Further, as shown in FIGS. 3 and 5, the main case 1 and the rubber print body 6 are integrated by press-fitting and engaging the engagement claws 16 with the left and right engagement step portions 23 of the print body holder 4. Next, the rail 27 is inserted and engaged with the guide groove 22a of the guide portion 22 from the lower surface side, and the upper and lower claws 26 of the side frame 5 are press-fitted and engaged with the engagement holes 15 of the main case 1, thereby 5 is integrated with the main case 1. Finally, the connecting wall 18 of the cover 3 is inserted into and engaged with the inner surface of the print body holder 4, the cover 3 is integrated with the main case 1, and the front and top openings of the main case 1 are closed with the cover 3.

  In the state where the cover 3 is attached, as shown in FIG. 1, the front surface of the cover 3 and the side frame 5 are flush with each other. As described above, the rubber stamp of the present invention can simply and easily end a series of assembling operations without causing any wrong assembly by simply press-fitting each component according to a predetermined procedure. It is not necessary to incorporate a coil spring that easily jumps.

  In the rubber stamp configured as described above, the leg surfaces 28 of the left and right lift frames 9 normally project downward from the marking surface 6a of the rubber printing body 6 as shown in FIG. 6a can be levitated and held. At the time of marking, the printing position is determined with reference to the position of the leg surface 28 of the lift frame 9 and the position of the front and rear indicators 24, and the main case 1 and the cover 3 are pressed to press the printing surface 6a against the paper surface. Or a character string.

  In the stamped state, as shown by an imaginary line in FIG. 4, the front and rear spring arms 8a are elastically deformed so as to approach each other, thereby exhibiting spring elasticity. Therefore, when the pressing force is released, the main case 1 and the print body holder 4 are pushed up and raised by the elastic force of the spring arm 8a, so that the marking surface 6a contacting the paper surface can be floated and held again. The spring arm 8a in the non-use state is almost unloaded. Moreover, the length of each spring arm 8a is set sufficiently larger than the vertical stroke of the lift frame 9, and the amount of elastic deformation of the spring arm 8a between the free state and the elastic deformation is extremely small. Therefore, it is possible to eliminate the creep deformation of the spring arm 8a during long-term use, and to exhibit appropriate spring elasticity over a long period.

  When the ink density of the printed character string decreases, the cover 3 is removed from the main case 1 and the ink replenishment opening 2 is released. In this state, a predetermined amount of ink is dropped onto the ink storage body 7 to increase the amount of ink stored in the rubber print body 6, whereby the ink density of the printed character string can be restored to an appropriate state. Since the entire upper surface of the ink occlusion body 7 is open, the ink can be dripped in a state of being evenly distributed on the upper surface of the ink occlusion body 7, and the rubber printing body 6 having a strip-like elongated marking surface 6a. Nevertheless, the ink density of the printed character string can be prevented from varying in the longitudinal direction.

  FIG. 6 shows a rubber stamp whose front and rear width of the stamp surface 6a is the same as that of the rubber stamp described above, but whose left and right width of the stamp surface 6a is large. Both rubber stamps have the same height. In the same manner as in the above rubber stamp, there is a main case 1 having an opening 2 on the front surface, a cover 3, a printing body holder 4, a pair of left and right side frames 5 and 5, a rubber printing body 6 and an ink occlusion body. 7, the lift spring 8 and the lift frame 9 constitute a rubber stamp. Among these components, the side frame 5, the lift spring 8, and the lift frame 9 are shared by the rubber stamp of the previous embodiment and the rubber stamp shown in FIG. Therefore, the rubber stamp shown in FIG. 6 can save the manufacturing cost by sharing the parts.

  Furthermore, if a mold for molding is commonly used in both rubber stamps, the manufacturing cost can be further reduced as compared with the case where each component is molded using a dedicated mold. In that case, a main case 1 having a large lateral width, a cover 3, and a printing body holder as shown in FIG. 6 are formed by interposing a core in the middle of the molding die in the lateral width direction. 4 can be molded. Furthermore, by preparing a plurality of cores having different left and right width dimensions, rubber stamps having various left and right width dimensions can be formed at low cost.

  FIG. 7 shows a modification of the lift spring 8. In this case, the lift spring 8 is composed of a single U-shaped spring arm 8b. Even in such a case, by setting the entire length of the spring arm 8b to be sufficiently larger than the vertical stroke of the lift frame 9, the entire spring arm 8a is bent and deformed to exhibit elasticity, and creep deformation during long-term use. Can be prevented. The spring arm 8b in this embodiment can be elastically deformed in a deformation space corresponding to the thickness dimension of the side wall of the side frame 5, similarly to the spring arm 8a described above.

  8 to 10 show another embodiment of the present invention. In this case, the shielding part 30 is formed so as to bulge above the left and right guide parts 22 so that the shielding part 30 covers the outer surface of the lift spring 8. Corresponding to the provision of the shielding part 30 integrally with the print body holder 4, the left and right thicknesses of the side frame 5 are set large, and the outer side surface of the shielding part 30 and the outer side surface of the side frame 5 are flush with each other in the assembled state. To be continuous.

  If the shielding part 30 is provided as described above, the rubber stamp can have a simple and clean appearance. Since the outer surface of the lift spring 8 is covered with the shielding part 30, dust is prevented from entering the movable parts and sliding parts such as the lift spring 8, the rail 27, and the guide groove 22a, and the movable parts become defective. Can be surely prevented. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted. The same applies to the following embodiments.

11 and 12 show a reference example of a rubber stamp according to another invention. In this case, the lift spring 8 and the lift frame 9 are constituted by one independent part, and this is engaged with the main case 1 and the side frame 5 in the previous embodiment is not used. The point that the case 1 also functions as the side frame 5 is different from the previous embodiment.

  Specifically, the main case 1 having an opening 2 on the front surface, a cover 3 for opening and closing the opening 2, a print body holder 4 attached to the lower portion of the main case 1, and the print body holder 4 are accommodated. A rubber stamp is composed of the rubber printed body 6 and the ink occluding body 7 and the lift frame 9 that floats and holds the marking surface 6 a of the rubber printed body 6. The lift frame 9 and the lift spring 8 are configured in the same manner as in the previous embodiment, and the mounting portion 32 is integrally provided on the upper portion of the lift spring 8.

  The mounting portion 32 is composed of a plate wall that is flush with the lift spring 8, and an attachment groove (attachment body) 33 is formed at the upper and lower centers of the wall surface. Inner walls 12a are formed on the inner surfaces of both side walls 12 of the main case 1, and engaging claws 16 are formed integrally therewith. Between the side wall 12 and the inner side wall 12a, an engagement rib (engagement body) 34 for inserting and engaging the mounting groove 33 is formed. In this case, the lift spring 8 is covered with the side wall 11 and the shielding wall 30 of the main case 1. However, as shown in FIG. 8, when the shielding portion 30 protrudes above the upper surface of the print body holder 4, the lift spring 8 is lifted. The outer surface of the spring 8 can be covered only with the shielding part 30.

13 and 14 show another reference example of the rubber stamp. In this case, the lift spring 8 and the lift frame 9 are constituted by one independent component, and this is engaged and mounted on the print body holder 4 via a mounting portion 32 provided on the upper portion of the lift spring 8. The mounting portion 32 is composed of a plate wall that is flush with the lift spring 8, and a square mounting hole (attachment body) 33 is formed at the center of the wall surface. The shielding wall 30 of the print body holder 4 extends upward from the shielding wall 30 shown in FIG. 8, and a rib-like engagement body 34 is formed on the inner surface thereof for inserting and engaging the previous mounting hole 33. .

  As described above, when the lift spring 8, the lift frame 9, and the mounting portion 32 are configured as one independent part, a plurality of types of lift frames 9 having different elastic forces of the lift spring 8 are prepared, and rubber stamps are prepared. The spring elasticity of the rubber stamp can be further optimized by properly using the lift frame 9 according to the difference between the left and right widths. Engaging bodies 34 are provided at upper and lower joint portions of the main case 1 and the shielding wall 30 of the printing body holder 4, and the mounting bodies 33 on the mounting portion 32 side are simultaneously engaged with these engaging bodies 34. The main case 1 and the print body holder 4 can be joined and fixed in a non-separable manner by the mounting portion 32.

  In the above embodiment, it is assumed that the numeric string and the character string are written horizontally, but the character string may be written vertically. A rail or guide projection can be provided on the guide portion 22 side, and a groove guided by the rail or guide projection can be formed on the lift frame 9 side. Since the shape of the lift spring 8 can be formed in various shapes such as a Z shape and an M shape as required, the shape is not limited to the shape described in the embodiments. The ink replenishment opening 2 can be opened on the rear surface side of the main case 1 and may be opened on the front and rear surfaces of the main case 1 if necessary. The lid 3 does not need to be in the form of a cover, and can be configured as a lid that can be opened and closed or a lid with a plug structure.

It is a perspective view of a rubber stamp. It is a disassembled perspective view of a rubber stamp. It is a longitudinal front view of a rubber stamp. It is a side view which shows the structure of a lift spring. It is the sectional view on the AA line in FIG. It is a perspective view which shows another Example of a rubber stamp. It is a side view which shows another Example of a lift spring. It is a disassembled perspective view which shows another Example of a rubber stamp. It is a vertical front view of the rubber stamp according to FIG. It is a side view of the rubber stamp which concerns on FIG. It is a disassembled perspective view which shows the reference example of a rubber stamp. It is a vertical front view of the rubber stamp which concerns on FIG. It is a disassembled perspective view of the principal part which shows another reference example of a rubber stamp. It is a vertical front view of the rubber stamp which concerns on FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main case 3 Cover 4 Printing body holder 5 Side frame 6 Rubber printing body 8 Lift spring 9 Lift frame 22 Guide part

Claims (4)

A main case (1) having an ink replenishing opening (2); a lid (3) for opening and closing the opening (2); a printing body holder (4) for housing a rubber printing body (6); A side frame (5) mounted on the left and right side surfaces of the case (1), a lift spring (8) disposed below the side frame (5) and levitating and holding the marking surface (6a) of the rubber printed body (6); Lift frame (9) and <BR>
The lift spring (8) and the lift frame (9) are integrally formed with the side frame (5), and the lift frame (9) can be slid up and down by guide portions (22) provided on both sides of the print body holder (4). Rubber stamp that is guided and supported by The lift spring (8) is composed of at least one spring arm (8a, 8b) continuous to the side wall of the side frame (5),
The rubber stamp according to claim 1, wherein the spring arms (8a, 8b) are configured to be elastically deformable in a deformation space corresponding to a thickness dimension of a side wall of the side frame (5). Under the main case (1), pressure is applied to the connecting frame (14) that is inserted and engaged with the inner surface of the opening of the print body holder (4), and the engaging portions (23) provided on both sides of the print body holder (4). An engaging claw (16) to be fitted and engaged,
Engaging structures (15, 26) that engage with each other are provided on opposing surfaces of the side wall (12) and the side frame (5) of the main case (1),
The main case (1) and the rubber print body (6) are integrated by engaging and connecting the connection frame (14) and the print body holder (4), and the engagement claw (16) and the engagement portion (23), The rubber stamp according to claim 1 or 2, wherein the engagement structure (15, 26) is engaged and connected so that the side wall (12) and the main case (1) are integrated. The rubber stamp according to any one of claims 1 to 3, wherein a shielding portion (30) for covering an outer surface of the lift spring (8) is provided on both sides of the printing body holder (4) .

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