JP5416656B2 - Printing device - Google Patents

Description

  The present invention relates to a printing apparatus for performing printing by pressing a printed material.

  This type of printing apparatus can be used, for example, when printing the date of manufacture on the packaging film, using a packaging film that wraps food or the like as an object to be printed. The printing apparatus is provided with a pressing member (printing body) having a printing surface on which a convex portion having a shape corresponding to the printing content is formed, and by pressing the pressing member against the printing object via the printing surface, Printing can be performed (see, for example, Patent Document 1).

  A plurality of pressing members are prepared corresponding to the contents of printing. For example, numbers such as “0” to “9”, slash “/”, period “.”, Hyphen “-”, plus In addition to symbols such as “+”, convex portions having shapes corresponding to various printing contents such as hiragana, katakana, and kanji are formed. By combining a plurality of such pressing members and mounting them side by side on the holding member (printing plate mounting portion) of the printing apparatus, it is possible to print a desired character string (including symbols and the like) on the printing object.

  An elastic member that can be deformed when the pressing member is pressed against the printing material may be provided between the pressing member and the holding member. In particular, in the case of a printed material having a level difference such as a packaging bag having a folded portion (so-called gusset bag), an elastic member is provided between the pressing member and the holding member so that each pressing member and the printed material are printed. It is possible to prevent the occurrence of variations in contact pressure with an object and to perform printing more favorably.

Japanese Utility Model Publication No. 62-90129

  As mentioned above, when the shape of the convex part formed in the printing surface differs for every pressing member, the area of the end surface of the convex part differs for every pressing member. Therefore, when each pressing member is pressed against the printing material with the same force, different pressures are applied to the printing material for each pressing member.

  In this case, when the convex portion formed on the printing surface of the pressing member has a shape corresponding to, for example, the numbers “0” to “9”, the pressing member is pressed with an appropriate pressure against the printing object. Even if it can be pressed, for example, when the shape corresponds to a symbol such as a period “.”, Hyphen “−”, plus “+”, etc., the area of the end face of the convex portion is relatively small. There is a possibility that the pressure of the pressing member against the printed material becomes too high.

  FIG. 7 is a perspective view showing an example of an aspect when the pressing member 111 is pressed against the printing object 102. As shown in FIG. 7, a printing surface 121 having a convex portion 122 is formed on the lower surface of the pressing member 111, and the end surface (lower end surface) of the convex portion 122 of the pressing member 111 is against the printing object 102. It is designed to be pressed from above. In the example of FIG. 7, the convex portion 122 having a shape corresponding to a period “.” Having a relatively small area of the end surface is formed on the printing surface 121, and the pressure of the pressing member 111 against the printing object 102 is too high. The pressed portion is recessed, and a protrusion 100 is formed on the back surface. As described above, when the pressure of the pressing member 111 against the printed material 102 becomes too high, the pressed portion of the printed material 102 is greatly deformed, or in some cases, a hole is formed in the pressed portion. There is also a possibility of getting lost.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a printing apparatus that can perform printing on an object to be printed with an appropriate pressure.

A printing apparatus according to the present invention is a printing apparatus for performing printing by pressing an object to be printed, and has a printing surface on which a convex portion having a shape corresponding to the content of printing is formed. a plurality of pressing members are pressed against the printing object Te, a holding member for holding the plurality of pressing members provided between the holding member and the plurality of pressing members, the plurality of pressing members An elastic member that can be deformed when pressed against a substrate, and in the plurality of pressing members , the smaller the area of the end surface of the convex portion formed on the printing surface, the more elastic the pressing member. The area of the contact surface with the member is small .

  According to such a configuration, the shape of the contact surface of the pressing member with the elastic member differs depending on the shape of the convex portion formed on the printing surface of the pressing member, so that different pressures are elastically applied to the pressing members. It can act on the member. When the pressure acting on the elastic member is different for each pressing member, the deformation amount of the elastic member is different for each pressing member, so that the pressure acting on the printed material is also different for each pressing member. Therefore, by making the contact surface of the pressing member with the elastic member into an appropriate shape, it is possible to perform printing with an appropriate pressure on the printing object.

Further , according to such a configuration, the pressing member having a smaller area of the end face of the convex portion formed on the printing surface and a larger pressure acting on the printing object when pressed with the same force, Since the area of the contact surface is small and the pressure acting on the elastic member from the pressing member increases, the amount of deformation of the elastic member increases. Thereby, since it can prevent that the pressure of the press member with respect to a to-be-printed material becomes high too much, it can print with a more suitable pressure with respect to a to-be-printed material.

  It is preferable that the area of the contact surface of the pressing member with the elastic member is 5 times or more the area of the end surface of the convex portion formed on the printing surface of the pressing member.

  According to such a structure, it can prevent that the contact surface with the elastic member in a press member is too small, and the pressure which acts on an elastic member from a press member becomes large too much. If the pressure acting on the elastic member from the pressing member becomes too large, problems such as the pressing member sticking into the elastic member occur, so the area of the contact surface of the pressing member with the elastic member is formed on the printing surface of the pressing member. By setting an appropriate value at 5 times or more of the area of the end face of the convex portion, it is possible to print well.

  A heating device for heating the pressing member may be provided, and the elastic member may be formed of a material having heat resistance at the heating temperature of the heating device.

  According to such a configuration, in a printing apparatus that performs printing by heating the pressing member, printing can be performed with an appropriate pressure using the elastic member having heat resistance. In the printing apparatus that performs printing by heating the pressing member, the printed material is easily affected by the heat from the pressing member, and therefore, when the pressure of the pressing member against the printed material becomes too high, the pressed portion is depressed, There is a high possibility that a hole will open. In such a printing apparatus, as described above, by adopting a configuration that can perform printing with an appropriate pressure on the object to be printed, it is possible that the pressed portion is recessed or a hole is opened. It can be effectively prevented.

  The holding member can hold a plurality of the pressing members, and when the plurality of pressing members are pressed against a printing object, the contact surface of each pressing member is in contact with the elastic member. It may be.

  According to such a configuration, when the plurality of pressing members are pressed against the printing object, different pressures are applied to the elastic member for each pressing member, so that the contact area of each elastic member with each pressing member is: The pressing member is deformed with a different deformation amount. Therefore, it is possible to perform printing on the printing object with an appropriate pressure by changing the pressure acting on the printing object from each pressing member for each pressing member.

It is the perspective view which showed an example of the printing apparatus which concerns on one Embodiment of this invention. It is sectional drawing which showed an example of the internal structure of a printing part. It is a principal part disassembled perspective view of a printing part. It is the perspective view which showed an example of the combination of a press member. It is the perspective view which showed an example of the press member. It is the figure which showed the modification of the shape of a contact surface. It is the perspective view which showed an example of the aspect at the time of a press member being pressed with respect to a to-be-printed object.

  FIG. 1 is a perspective view showing an example of a printing apparatus 1 according to an embodiment of the present invention. The printing apparatus 1 includes a base 3 on which a substrate 2 is placed, a printing unit 4 that is attached to the base 3 so as to be rotatable about a rotation shaft 6, and a printing unit 4 that rotates. And an operation lever 5 for moving and pressing the printed material 2.

  Examples of the printed material 2 include a packaging film that wraps foodstuffs, but is not limited to this, and a packaging film that wraps things other than foodstuffs, a film other than packaging, etc. It may be a thing other than a film. After the user places the printing object 2 on a predetermined position on the base 3, the user pushes down the operation lever 5 to rotate the printing unit 4 downward about the rotation shaft 6, thereby The printing object 2 can be sandwiched between the printing unit 4 and printing.

  FIG. 2 is a cross-sectional view showing an example of the internal configuration of the printing unit 4. FIG. 3 is an exploded perspective view of a main part of the printing unit 4. The printing unit 4 includes a pressing member 11 that is pressed against the substrate 2, a holding member 12 that holds the pressing member 11, a heating device 13 that heats the pressing member 11, and a printing tape 140. A printing tape transport mechanism 14 for transporting (ink ribbon) is provided.

  The pressing member 11 is formed of a columnar body made of a metal such as brass, and is attached to the holding member 12 so as to extend in the vertical direction. In this example, a plurality of pressing members 11 can be held by the holding member 12. More specifically, the plurality of pressing members 11 can be arranged in the width direction L1 and held in two rows in the front-rear direction L2. In FIG. 3, only one row of pressing members 11 is shown. The pressing member 11 is not limited to the configuration in which the pressing members 11 are held in two rows in the front-rear direction L2, and may be only one row or may be held in three or more rows.

  The lower end surface of the pressing member 11 constitutes a printing surface 21 that faces the substrate 2, and the pressing member 11 is pressed against the substrate 2 through the printing surface 21. As shown in FIG. 3, a convex portion 22 having a shape corresponding to the print content is formed on the print surface 21. A plurality of pressing members 11 are prepared corresponding to the contents of printing, and numbers such as “0” to “9”, a slash “/”, a period “.”, A hyphen “−” are provided on the printing surface 21 of each pressing member 11. In addition to symbols such as “+” and “+”, convex portions 22 having shapes corresponding to various printing contents such as hiragana, katakana, and kanji are formed. By combining a plurality of such pressing members 11 and mounting them side by side on the holding member 12, a desired character string (including symbols and the like) can be printed on the printing object 2.

  The printing tape transport mechanism 14 includes a delivery roller 141, a take-up roller 142, a drive roller 143, a press roller 144, and the like. The delivery roller 141 rotatably holds the print tape 140 wound in a roll shape, and the print tape 140 is delivered as the delivery roller 141 rotates. The printing tape 140 delivered from the delivery roller 141 is conveyed so as to be wound around the printing surface 21 of the pressing member 11 and is taken up by a rotatable take-up roller 142.

  The drive roller 143 is rotationally driven based on a slide displacement of a slide shaft 145 connected through, for example, a one-way clutch (not shown). The slide shaft 145 is attached so as to extend in the vertical direction, and is held in a state in which it can slide in the vertical direction. When the operation lever 5 is pushed down and the printing unit 4 is rotated downward about the rotation shaft 6, the lower end portion of the slide shaft 145 contacts the base 3, and the slide shaft 145 is directed upward. Slide displacement. At this time, the drive roller 143 rotates by an amount corresponding to the slide amount of the slide shaft 145 by the action of the one-way clutch.

  The driving roller 143 and the pressing roller 144 are provided so that their outer peripheral surfaces face each other, and the print tape 140 fed from the feeding roller 141 passes between the driving roller 143 and the pressing roller 144 and is taken up by the winding roller 142. It is conveyed to. The print tape 140 can be automatically fed from the feed roller 141 by the rotational drive of the drive roller 143 as described above, and can be taken up by the take-up roller 142. At this time, the press roller 144 presses the print tape 140 toward the drive roller 143, so that the print tape 140 can be transported satisfactorily.

  Since the printing tape 140 is hung around the printing surface 21 of the pressing member 11, the printing surface 21 of the pressing member 11 can be obtained when the operation lever 5 is pushed down and the printing unit 4 is rotated to the printing object 2 side. Is pressed against the substrate 2 via the printing tape 140. As a result, the ink contained in the printing tape 140 can be transferred to the substrate 2 and the printing content corresponding to the shape of the convex portion 22 formed on the printing surface 21 of the pressing member 11 can be printed. In the present embodiment, the pressing member 11 is heated by the heating device 13, so that the ink contained in the printing tape 140 can be transferred to the printed material 2 better.

  The holding member 12 is held so as to be slidable in the vertical direction, and is biased downward by a compression spring 16 which is an example of a biasing means. Therefore, when the printing lever 21 is pressed down and the printing surface 21 of the pressing member 11 is pressed against the printing material 2 via the printing tape 140, the holding member 12 is resisted against the urging force of the compression spring 16. Slides upward so that the impact during pressing is reduced.

  As shown in FIG. 3, an elastic member 15 made of, for example, silicon rubber is provided between the pressing member 11 and the holding member 12. A surface of the pressing member 11 opposite to the printing surface 21 forms a contact surface 23 with the elastic member 15. The elastic member 15 has a long shape extending along the width direction L1 and comes into contact with the contact surfaces 23 of the plurality of pressing members 11 arranged side by side in the width direction L1. As illustrated in FIG. 2, when the pressing members 11 are arranged in a plurality of rows in the front-rear direction L <b> 2, the elastic members 15 may be provided in association with each row. However, the configuration is not limited to the above, and for example, the elastic member 15 may be in contact with the contact surfaces 23 of all the pressing members 11, and the elastic member 15 is provided for each predetermined number of pressing members 11. It may be provided.

  When the printing surface 21 of the pressing member 11 is pressed against the printing object 2 via the printing tape 140 by the operation lever 5 being pushed down, pressure acts on the elastic member 15 from the contact surface 23 of the pressing member 11. Therefore, the elastic member 15 is deformed. In the present embodiment, the contact surfaces 23 of the plurality of pressing members 11 are in contact with one elastic member 15. Therefore, the contact area of the elastic member 15 with the contact surface 23 of each pressing member 11 is deformed according to the pressure from each contact surface 23.

  The holding member 12 is formed in a box shape that can accommodate the pressing member 11 and the elastic member 15. The holding member 12 is made of metal, and the pressing member 11 provided inside the holding member 12 can be heated by heating the holding member 12 with a heating device 13 from the outside. The heating temperature of the heating device 13 is, for example, 100 ° C. to 180 ° C. The elastic member 15 is not limited to silicon rubber and may be formed of other materials as long as the elastic member 15 is heat resistant at the heating temperature of the heating device 13. In the present embodiment, since the elastic member 15 is provided between the pressing member 11 and the holding member 12, for example, the printed material 2 having a step such as a packaging bag having a folded portion (so-called gusset bag). Even when printing is performed, it is possible to prevent the contact pressure between each pressing member 11 and the printing material 2 from being varied and perform printing more satisfactorily.

  FIG. 4 is a perspective view showing an example of the combination of the pressing members 11. In this example, the date of “2010.11.20” (for example, the date of manufacture) is determined by the combination of the pressing members 11 having the convex portions 22 corresponding to the numbers and the period “.” Formed on the printing surface 21. The character string to be represented can be printed on the substrate 2.

  In the example of FIG. 4, the convex portion 22 corresponding to the period “.” Has a smaller end surface area than the convex portion 22 corresponding to the numeral. Therefore, when each pressing member 11 is pressed against the printing material 2 with the same force, the pressure acting on the printing material 2 from the end face of the convex portion 22 corresponding to the period “.” Becomes too high. There is a possibility that the pressed part is depressed and a protrusion is formed on the back surface or a hole is formed in the pressed part. Such a problem is not limited to the pressing member 11 having the convex portion 22 corresponding to the period “.”, But a pressing member having a relatively small area of the end surface of the convex portion 22 such as a hyphen “−” or a plus “+”. 11 occurs similarly.

  Therefore, in the present embodiment, the pressing member 11 is made different in the shape of the contact surface 23 with the elastic member 15 according to the shape of the convex portion 22 formed on the printing surface 21 of the pressing member 11. Different pressures can be applied to the elastic member 15 every 11. When the pressure acting on the elastic member 15 is different for each pressing member 11, the amount of deformation of the elastic member 15 is different for each pressing member 11, so that the pressure acting on the substrate 2 is also different for each pressing member 11. Become. Therefore, by making the contact surface 23 of the pressing member 11 with the elastic member 15 into an appropriate shape, it is possible to perform printing on the print substrate 2 with an appropriate pressure.

  FIG. 5 is a perspective view showing an example of the pressing member 11. In this example, the pressing member 11 in which the convex portion 22 corresponding to the period “.” Is formed on the printing surface 21 is shown. A contact surface 23 having an area smaller than that of the original end surface is formed on the surface of the pressing member 11 opposite to the printing surface 21 by cutting using a cutting tool. The contact surface 23 in this example is formed in a rectangular shape having a short side of 1 mm and a long side of 2 mm, and protrudes at a height of 0.3 to 0.5 mm. The original end face before cutting has a rectangular shape with a short side of 2.4 mm and a long side of 4.8 mm.

  In the example shown in FIG. 4, only the pressing member 11 on which the convex portion 22 corresponding to the period “.” Is formed on the printing surface 21 is cut at the end surface opposite to the printing surface 21, corresponding to numerals. The other pressing member 11 in which the convex portion 22 is formed on the printing surface 21 is not cut. Thereby, it is comprised so that the area of the contact surface 23 with the elastic member 15 in the press member 11 may become small, so that the area of the end surface of the convex part 22 currently formed in the printing surface 21 of the press member 11 is small.

  As shown in FIG. 3, the contact surface 231 of the pressing member 11 having a small area of the end surface of the convex portion 22 (for example, the pressing member 11 on which the convex portion 22 corresponding to the period “.” Is formed) and the end surface of the convex portion 22 The contact surface 231 has a smaller area than the contact surface 232 with respect to the contact surface 232 of the press member 11 having a large area (for example, the press member 11 on which the convex portions 22 corresponding to numerals are formed). For this reason, the pressure F1 acting on the elastic member 15 from the contact surface 231 becomes larger than the pressure F2 acting on the elastic member 15 from the contact surface 232.

  As described above, the pressing member 11 (for example, the period “.”) Has a small area of the end surface of the convex portion 22 formed on the printing surface 21 and a large pressure acting on the printing object 2 when pressed with the same force. The area of the contact surface 23 (the contact surface 231 in the example of FIG. 3) with the elastic member 15 is smaller as the corresponding convex member 22 is formed on the pressing member 11), and the pressure acting on the elastic member 15 from the pressing member 11 ( In the example of FIG. 3, since the pressure F1) increases, the deformation amount of the elastic member 15 increases. Thereby, since it can prevent that the pressure of the press member 11 with respect to the to-be-printed material 2 becomes high too much, it can print with more suitable pressure with respect to the to-be-printed material 2. FIG.

  In particular, as in this embodiment, when the plurality of pressing members 11 are pressed against the substrate 2, the contact surface 23 of each pressing member 11 is in contact with the elastic member 15. Since different pressures are applied to the elastic member 15 for each pressing member 11, the contact area of the elastic member 15 with each pressing member 11 is deformed with a different deformation amount for each pressing member 11. Therefore, it is possible to perform printing on the printing object 2 with an appropriate pressure by changing the pressure acting on the printing object 2 from each pressing member 11 for each pressing member 11.

  Further, in the printing apparatus 1 that performs printing by heating the pressing member 11 as in the present embodiment, since the printing object 2 is easily affected by the heat from the pressing member 11, If the pressure becomes too high, there is a high possibility that the pressed part will be depressed or a hole will be opened. In such a printing apparatus 1, the pressed portion is recessed or a hole is opened by adopting a configuration in which printing can be performed on the printing object 2 with an appropriate pressure as described above. Can be effectively prevented.

  The shape of the contact surface 23 is not limited to the rectangular shape, but may be a square shape or any other shape, but the area of the contact surface 23 is five times the area of the end surface of the convex portion 22. It is preferable that it is above, and more preferably about 15 times. Thereby, it can prevent that the contact surface 23 with the elastic member 15 in the press member 11 is too small, and the pressure which acts on the elastic member 15 from the press member 11 becomes large too much. If the pressure acting on the elastic member 15 from the pressing member 11 becomes too large, problems such as the pressing member 11 sticking into the elastic member 15 occur, so the area of the contact surface 23 of the pressing member 11 with the elastic member 15 is pressed. By setting an appropriate value at 5 times or more of the area of the end face of the convex portion 22 formed on the printing surface 21 of the member 11, it is possible to print well.

  FIG. 6 is a view showing a modification of the shape of the contact surface 23. The contact surface 23 is not limited to a configuration including one surface as in the example of FIG. 5, and may be configured to include two or more surfaces as in the example of FIG. In the example of FIG. 6A, the contact surface 23 extends from one end of the end surface of the pressing member 11 to the other end. Therefore, since the cutting process for forming the contact surface 23 can be performed in a single process, compared with the configuration in which the cutting process must be performed in a plurality of processes as in the example of FIG. 11 processing is easy.

  In the example of FIG. 6B, the contact surface 23 is composed of one surface, but the contact surface 23 extends from one end of the end surface of the pressing member 11 to the other end. Also in this example, since the number of cutting processes for forming the contact surface 23 can be reduced as compared with the example of FIG. 5, the pressing member 11 can be easily processed.

  In the example of FIG. 6, a configuration in which the contact surface 23 extends in parallel to the long side of the end surface of the pressing member 11 is shown. However, the configuration is not limited to this configuration, and the end surface of the pressing member 11 is short. It may be configured to extend parallel to the side. Further, the contact surface 23 is not limited to a configuration extending in a straight line, and can be formed in a special shape in addition to a curved line shape or a bent line shape.

  The pressing member 11 is not limited to one formed by cutting brass, and can be formed by any processing method using other various materials. For example, the pressing member 11 can be formed by casting using lead. However, when the pressing member 11 is formed by cutting, the edge of the convex portion 22 formed on the printing surface 21 is likely to be sharp, and the pressing member 11 can be printed via the convex portion 22. When pressed, there is a high possibility that the substrate 2 is deformed or a hole is opened. Therefore, the present invention is particularly effective when the pressing member 11 is formed by cutting.

DESCRIPTION OF SYMBOLS 1 Printing apparatus 2 To-be-printed object 3 Base 4 Printing part 5 Operation lever 6 Rotating shaft 11 Pressing member 12 Holding member 13 Heating device 14 Printing tape conveyance mechanism 15 Elastic member 21 Printing surface 22 Convex part 23 Contact surface 140 Printing tape 141 Sending out Roller 142 Winding roller 143 Drive roller 144 Roller 145 Slide shaft

Claims (4)

A printing device for performing printing by pressing an object to be printed,
A plurality of pressing members each having a printing surface on which a convex portion having a shape corresponding to the printing content is formed, and pressed against the substrate via the printing surface;
A holding member for holding the plurality of pressing members;
An elastic member that is provided between the plurality of pressing members and the holding member and is deformable when the plurality of pressing members are pressed against a printing object;
In the plurality of pressing members , the area of the contact surface of the pressing member with the elastic member is smaller as the area of the end surface of the convex portion formed on the printing surface is smaller . Printing according to claim 1, wherein the area of the contact surface between the elastic member in the pressing member, wherein said at pressing member 5 times or more the area of the end surface of the convex portion formed on the printed surface of the apparatus. A heating device for heating the pressing member;
Said elastic member is a printing apparatus according to claim 1 or 2, characterized in that it is formed of a material having a heat resistance at the heating temperature of the heating device. The holding member can hold a plurality of the pressing members,
The printing apparatus according to any one of claims 1 to 3 , wherein when the plurality of pressing members are pressed against the printing object, the contact surface of each pressing member contacts the elastic member.

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