Printer

Abstract

To provide a printer capable of applying proper printing to a printing medium longer than a printable range of a printing drum by a simple configuration.SOLUTION: A printer comprises a printing drum 10 that has a fitting part 13 fitted with one end of stencil paper S and around which the stencil paper S attached to the fitting part 13 is wound, and an installation part 20 in which a printing medium P is installed and which moves while pressing the printing medium P against the stencil paper S wound around the printing drum 10. The installation part 20 has a print receiver member 23 capable of moving in the direction of heading for the printing drum 10 and a direction opposite to the direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a printing device that prints on a print medium. [Background technology]

[0002] BACKGROUND ART Conventionally, a stencil printing apparatus has been proposed that performs stencil printing using a printing drum around which a stencil sheet on which thermal perforations have been applied is wound (see, for example, Patent Document 1).

[0003] In a stencil printing device, the printing drum rotates and the printing medium is transported toward the printing drum, and a press roller presses the printing medium against the stencil paper, causing ink that seeps out from inside the printing drum to be transferred to the printing medium through the stencil paper.

[0004] The printing drum in a stencil printing machine has a mounting part to which one end of the stencil paper is attached and which holds the stencil paper (see, for example, Patent Document 1). When the printing drum around which the stencil paper is wound rotates, the press roller moves up and down to avoid collision with the mounting part. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-213520 Summary of the Invention [Problem to be solved by the invention]

[0006] Here, for example, when the print medium is clothing or the like that is not smooth and uniform in shape like paper, it is necessary to mount the clothing on a flat printing table and perform printing.

[0007] However, if the printing table on which the garment is attached is larger than the printable range (the circumference of the print drum minus the length of the mounting part), it is not possible to avoid collision with the mounting part by moving the press roller up and down as in the past. Furthermore, a large-scale movement mechanism is required to move the entire printing table up and down. In other words, it is not possible to print on print media longer than the printable range of the print drum.

[0008] Furthermore, if the printing table is heavy, the pressing force on the printing drum must be increased accordingly, which makes it difficult to apply the pressing force evenly.

[0009] SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a printing device that can perform appropriate printing on a print medium that is longer than the length of the printable range of a printing unit with a simple configuration. [Means for solving the problem]

[0010] The printing device of the present invention comprises a printing unit in which a print image is formed and which has an attachment portion that protrudes outward, and an installation unit in which a print medium is placed and which moves while pressing the print medium against the printing unit, and the installation unit has a print receiving member that can move in a direction toward the printing unit and in a direction opposite to that direction. [Effects of the Invention]

[0011] According to the printing device of the present invention, a print receiver member that can move toward and away from the printing unit is provided on a mounting unit on which the print medium is placed, so that even if the print medium is longer than the printable range of the printing unit, the movement of the print receiver member can avoid collision with the mounting unit. In other words, the simple configuration of the print receiver member makes it possible to perform appropriate printing on print media that is longer than the printable range of the printing unit. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic diagram illustrating a printing apparatus according to an embodiment of the present invention; [Figure 2]Top view of the installation area [Figure 3] Illustration showing the print bed open DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a stencil printing machine using one embodiment of the printing machine of the present invention will be described in detail with reference to the drawings. Figure 1 is a diagram showing the schematic configuration of the stencil printing machine 1 of this embodiment. The top, bottom, left, and right shown in Figure 1 are the top, bottom, left, and right of the stencil printing machine 1 of this embodiment, and the front side of the paper is the front side, and the back side of the paper is the rear side.

[0014] 1, the stencil printing machine 1 of this embodiment includes a printing drum 10 housed in a housing 2 and a placement section 20 on which a printing medium P is placed. In this embodiment, the printing drum 10 corresponds to the printing section of the present invention.

[0015] The printing drum 10 is supported rotatably about a rotation axis extending in its axial direction (a direction perpendicular to the plane of the paper in FIG. 1), and is driven to rotate by a drum drive unit (not shown). The printing drum 10 is ink permeable, and a stencil sheet S (corresponding to the printing plate of the present invention) made in a platemaking unit (not shown) is wound around the outer circumferential surface of the printing drum 10.

[0016] An attachment portion 13 is provided on the outer peripheral surface of the printing drum 10. One end of the stencil paper S is attached to and held by the attachment portion 13. Then, the stencil paper S is wound around the printing drum 10 with its one end held by the attachment portion 13.

[0017] A squeegee roller 11 and a doctor roller 12 are provided inside the printing drum 10. The squeegee roller 11 and the doctor roller 12 are each cylindrical members extending in the direction of the rotation axis of the printing drum 10. The squeegee roller 11 is supported so that it can rotate around an axis of rotation that is parallel to the axis of rotation of the printing drum 10. The doctor roller 12 is fixed to the squeegee roller 11 with a specified gap between them.

[0018] Ink is supplied from a predetermined ink supply means (not shown) between the squeegee roller 11 and the doctor roller 12. The ink supplied from the ink supply means is stored to form an ink pool extending in the direction of the rotation axis of the print drum 10.

[0019] The ink stored in the ink pool forms an ink film on the outer peripheral surface of the squeegee roller 11, with the supply amount adjusted by the gap between the squeegee roller 11 and the doctor roller 12. The squeegee roller 11 is positioned with a small gap from the inner peripheral surface of the printing drum 10, and is in contact with the inner peripheral surface of the printing drum 10 via the ink film on the outer peripheral surface of the squeegee roller 11.

[0020] During printing, the print drum 10 rotates in the direction of arrow A shown in Fig. 1, and the squeegee roller 11 rotates in the direction of arrow B shown in Fig. 1. When the squeegee roller 11 rotates in the direction of arrow B, ink is drawn out of the ink reservoir and supplied to the area in contact with the print drum 10.

[0021] The setting section 20 is where the printing medium P is set. The setting section 20 moves in the direction of arrow C shown in FIG. 1 by a movement mechanism (not shown) in synchronization with the rotation of the printing drum 10. The setting section 20 moves while pressing the printing medium P against the stencil paper S wrapped around the printing drum 10. This causes the printing medium P to be pressed against the stencil paper S on the outer peripheral surface of the printing drum 10. This pressing causes ink from the printing drum 10 to pass through the holes in the stencil paper S and transfer to the printing medium P, thereby performing stencil printing.

[0022] The movement mechanism described above includes, for example, rails that support the installation unit 20 so that it can move horizontally, a rack provided below the installation unit 20, and a pinion that meshes with the rack. The pinion rotates in synchronization with the rotation of the printing drum 10, causing the installation unit 20 to move horizontally along the rails.

[0023] The length of the installation section 20 in the movement direction is longer than the printable range of the print drum 10. The printable range is (the peripheral length of the print drum - the length of the attachment section 13).

[0024] Specifically, the installation unit 20 includes a base 21, a print table 22, a print receiving member 23, and a pressing mechanism 24. Fig. 2 is a plan view from above of the installation unit 20 on which the print medium P shown in Fig. 1 is installed. For convenience, the print receiving member 23 below the print medium P is shown in Fig. 2 by a solid line.

[0025] Base 21 and printing table 22 are made of plate-like members and are arranged to overlap with a predetermined gap between them. Hinges 25 are formed at one end of base 21 and printing table 22. As shown in Figure 3, installation unit 20 is configured so that printing table 22 can rotate in the direction of arrow D relative to base 21 via hinge 25. With printing table 22 open as shown in Figure 3, the T-shirt, which is a cylindrical printing medium P, is placed on printing table 22 by placing printing table 22 over the inside of the T-shirt.

[0026] During printing, after the print medium P is placed on the printing table 22, the printing table 22 is closed and returned to the state shown in Fig. 1. A restricting portion 22a is provided at the end of the printing table 22 opposite the hinge 25 side. The restricting portion 22a is a wall member that stands perpendicular to the printing table 22. When the printing table 22 is closed, the restricting portion 22a abuts against the surface of the base 21, thereby maintaining a gap between the printing table 22 and the base 21.

[0027] As shown in Fig. 2, the printing table 22 of this embodiment is formed to be smaller in size than the base 21. It has shoulder portions 22b onto which the shoulder portions of the T-shirt, which is the printing medium P, are hooked, and a neck portion 22c through which the neck portion of the T-shirt is passed. The above-mentioned restricting portion 22a is provided at the tip of the neck portion 22c. The hatched area in Fig. 2 is the printing range of the printing medium P.

[0028] A print receiving member 23 and a pressing mechanism 24 are provided on the surface of the printing table 22 facing the printing drum 10. The pressing mechanism 24 is provided between the print receiving member 23 and the printing table 22.

[0029] The print receiving member 23 is a rectangular plate-like member that supports the print medium P on the printing table 22. As shown in Fig. 2, the print receiving member 23 is formed to be smaller in size than the printing table 22. The length L (see Fig. 1) of the print receiving member 23 in the movement direction of the installation section 20 is shorter than the length of the printable range.

[0030] In addition, inclined surfaces 23a that slope downward toward the ends are formed on both ends of the print receiver 23 in the direction of movement of the placement section 20. The print medium P is placed along these inclined surfaces 23a.

[0031] By forming the inclined surface 23a in this manner, it is possible to make it easier to receive the printing drum 10 when it comes into contact with the print receiving member 23. Furthermore, since the impact when the attachment portion 13 comes into contact can be reduced, the installation portion 20 can move more smoothly and it is possible to prevent the printing medium P from shifting due to contact with the printing drum 10.

[0032] The pressing mechanism 24 includes a spring member 24a and a link mechanism 24b. One end of the spring member 24a is connected to the surface of the printing table 22 facing the printing drum 10, and the other end is connected to the surface of the print receiving member 23 on the side opposite the printing drum 10. The elasticity of the spring member 24a allows the print receiving member 23 to move in the direction of arrow E shown in FIG. 1 (the direction toward the printing drum 10 and the direction opposite). In this embodiment, the movement distance of the print receiving member 23 is set to be equal to or greater than the maximum height of the mounting portion 13 from the surface of the printing drum 10. Note that, although the spring member 24a is used as the elastic member of the present invention in this embodiment, any material having elasticity may be used, for example, rubber or rubber-like materials.

[0033] The link mechanism 24b includes two link members 24c (corresponding to support members of the present invention) arranged in parallel. The two link members 24c are arranged at a predetermined interval in the movement direction of the installation unit 20, sandwiching the spring member 24a therebetween.

[0034] One end of the link member 24c is rotatably connected to the surface of the printing table 22 facing the printing drum 10, and the other end is rotatably connected to the surface of the print receiving member 23 on the opposite side from the printing drum 10. By configuring the link mechanism 24b using two link members 24c in this way, the elastic force of the spring member 24a is applied uniformly to the surface of the print receiving member 23. As a result, the surface of the printing medium P on the print receiving member 23 is pressed uniformly against the printing drum 10.

[0035] When stencil printing is performed, the printing drum 10 rotates as described above, and the placement section 20 on which the printing medium P is placed moves toward the printing drum 10.

[0036] The installation section 20 then moves while pressing the printing medium P against the stencil paper S on the printing drum 10, and at this time, the spring member 24a contracts due to contact of the printing drum 10 with the print receiving member 23, causing the print receiving member 23 to move downward (in the opposite direction to the direction toward the printing drum 10). At this time, the print receiving member 23 is urged toward the printing drum 10 by the elastic force of the spring member 24a, and the printing medium P on the print receiving member 23 is pressed against the stencil paper S on the printing drum 10.

[0037] While the printing drum 10 and the print receiving member 23 are in contact with each other, the spring member 24a is in a compressed state, and the printing medium P is pressed against the printing drum 10 at a pressure equal to or greater than a predetermined pressure.

[0038] After the printing drum 10 has passed the print receiving member 23, the spring member 24a is stretched, and the print receiving member 23 moves upward (towards the printing drum 10) and returns to its original state.

[0039] According to the stencil printing machine 1 of the above embodiment, the installation section 20 has a print receiving member 23 that is movable in the direction toward the printing drum 10 and in the direction opposite thereto, so that even if the length of the printing medium P is longer than the printable range of the printing drum 10, the movement of the print receiving member 23 can avoid collision with the mounting section 13. In other words, with the simple configuration of the print receiving member 23, it is possible to perform appropriate stencil printing on a printing medium P that is longer than the printable range of the printing drum 10.

[0040] In the stencil printing machine 1 of the above embodiment, the movement distance of the print receiver member 23 is set to be equal to or greater than the maximum height of the attachment portion 13, so that collision of the attachment portion 13 can be sufficiently avoided.

[0041] Furthermore, in the stencil printing device 1 of the above embodiment, the length of the placement section 20 in the movement direction is longer than the printable range of the printing drum 10, so that a printing medium P longer than the printable range of the printing drum 10 can be placed thereon.

[0042] Furthermore, in the stencil printing device 1 of the above embodiment, a spring member 24a is provided to movably support the print receiving member 23, and a link member 24c is provided to support the print receiving member 23 so that the print medium P on the print receiving member 23 is pressed uniformly against the print drum 10. This allows the print medium P to be pressed uniformly against the print drum 10 with a simple configuration, thereby enabling more appropriate stencil printing.

[0043] Furthermore, in the stencil printing machine 1 of the above embodiment, the length of the print receiving member 23 is shorter than the printable range of the printing drum 10, so that appropriate stencil printing can be performed on the print range on the print receiving member 23.

[0044] Furthermore, the above embodiment is an example in which the present invention is applied to a stencil printing machine, but the present invention is not limited to this and can also be applied to, for example, a rotary relief printing machine.

[0045] The present invention is not limited to the above-described embodiments, and the components can be modified and embodied in practice without departing from the spirit of the invention. Furthermore, various inventions can be formed by appropriately combining the multiple components disclosed in the above-described embodiments. For example, all of the components shown in the embodiments can be appropriately combined. Naturally, various modifications and applications are possible without departing from the spirit of the invention.

[0046] The present invention further discloses the following supplementary notes. (Appendix 1) The printing device of the present invention comprises a printing unit in which a print image is formed and which has an attachment portion that protrudes outward, and an installation unit in which a print medium is placed and which moves while pressing the print medium against the printing unit, and the installation unit has a print receiving member that can move in a direction toward the printing unit and in a direction opposite to that direction.

[0047] (Appendix 2) In the printing device described in Appendix 1, the printing unit may have a substantially cylindrical outer peripheral surface, and one end of the printing plate may be attached to the attachment unit.

[0048] (Appendix 3) In the printing device according to Supplementary Note 1 or Supplementary Note 2, the movement distance of the print receiver member is preferably equal to or greater than the maximum height of the attachment portion from the outer surface of the printing portion.

[0049] (Appendix 4) In the printing device according to any one of Supplementary Note 1 to Supplementary Note 3, it is preferable that the length of the placement unit in the movement direction is longer than the printable range of the printing unit.

[0050] (Appendix 5) The printing device described in any one of Supplementary Notes 1 to 4 may have an elastic member that movably supports the print receiving member, and a link mechanism that supports the print receiving member so that the printing medium on the print receiving member is pressed uniformly against the printing unit.

[0051] (Appendix 6) In the printing device according to any one of Supplementary Note 1 to Supplementary Note 5, it is preferable that the length of the print receiver member in the direction of movement of the placement unit is shorter than the printable range of the printing unit. [Explanation of symbols]

[0052] 1 Stencil printing device 2. Case 10 Printing drum 11 Squeegee roller 12 Dr. Laura 13 Mounting part 20 Installation part 21 Foundation 22 Print stand 22a Regulatory Department 22b Shoulder 22c neck 23 Print receiver 23a Slope 24 Pressing mechanism 24a Spring member 24b Link mechanism 24c Link member 25 Hinge P Print media S Duplicate paper

Claims

1. a printing section having a print image formed thereon and an attachment section protruding outward; a setting unit on which a print medium is set and which moves while pressing the print medium against the printing unit; A printing device in which the installation section has a print receiving member that is movable in a direction toward the printing section and in a direction opposite to that direction.

2. 2. The printing apparatus according to claim 1, wherein the printing unit has a substantially cylindrical outer peripheral surface, and one end of a printing plate is attached to the attachment unit.

3. 2. The printing device according to claim 1, wherein the movement distance of said print receiving member is equal to or greater than the maximum height of said attachment portion from the outer surface of said printing portion.

4. 2. The printing device according to claim 1, wherein the length of the installation section in the movement direction is longer than the printable range of the printing section.

5. 2. The printing device according to claim 1, further comprising: an elastic member for movably supporting said print receiving member; and a link mechanism for supporting said print receiving member so that said print medium on said print receiving member is uniformly pressed against said printing section.

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