JP6016293B2 - Liquid supply device - Google Patents

Description

  The present invention relates to a liquid supply apparatus that supplies a liquid from a plate material to a surface of an object through a squeegee, and in particular, a rotary that performs ink printing and varnish coating on a surface of a sheet or web from a rotary screen via a squeegee. It is effective when applied to a screen device.

  For example, a rotary screen device that prints ink on the surface of a sheet pushes the ink inside through a plurality of holes formed in the rotary screen with a squeegee, and the above is applied to the sheet held on the outer peripheral surface of the impression cylinder. Ink can be screen-printed (for example, see Patent Document 1 below).

Japanese Patent No. 4508686

  In the conventional rotary screen device as described above, when high-speed screen printing is performed by rotating the rotary screen or the like at a high speed, the ink fed into the rotary screen violently collides with the squeegee. While being bounced back, it was greatly agitated and air was embraced inside, making it easy to foam. When the ink bubbles in this way, the ink pushed out from the holes of the rotary screen is likely to be uneven, which may cause a decrease in print quality.

  Such a problem is not limited to a rotary screen device that screen-prints ink on the surface of a sheet. For example, a rotary screen device that screen-prints ink on the surface of a web, or a rotary screen device that screen-coats varnish on the surface of a sheet or web. Including screen devices, including lithographic screen devices that perform ink screen printing and varnish screen coating on the surface of sheets and webs, liquid is extruded from the plate material through the squeegee and supplied to the surface of the object. If it is the liquid supply apparatus which does, it can occur like the above-mentioned case.

  In view of the above, an object of the present invention is to provide a liquid supply apparatus that can supply liquid evenly to the surface of the object.

In order to solve the above-described problems, a liquid supply apparatus according to the present invention includes a plate material in which one surface is brought into contact with the surface of an object and a plurality of holes are formed, and the other surface of the plate material is in contact with the plate material. A squeegee for extruding the liquid fed to the other surface of the plate material from the hole to the surface of the object, and the plate material when extruding the liquid from the hole of the plate material; The movement of the liquid is regulated such that the liquid is disposed in the downstream side in the movement direction of the squeegee in the relative movement with the squeegee so as to keep the liquid in the space on the downstream side in the movement direction of the contact portion of the squeegee with the plate material. A liquid movement restriction member is provided , and the liquid movement restriction member is disposed so as to have a gap without contacting the plate material .

  The liquid supply apparatus according to the present invention is characterized in that, in the liquid supply apparatus described above, the liquid movement restricting member covers at least a part of the space.

  The liquid supply apparatus according to the present invention is characterized in that, in the liquid supply apparatus described above, the liquid movement restricting member is extended so as to be connected to the squeegee without a gap. .

In addition, the present invention provides a cylindrical impression cylinder that is rotatably supported so as to be in contact with the impression cylinder and that is a plate material that is the plate material that is rotatably supported so as to be in contact with the impression cylinder. And the squeegee is disposed inside the hollow cylinder so as to be oriented in the longitudinal direction along the axial direction of the hollow cylinder, and is in contact with the inner peripheral surface of the hollow cylinder. A rotary screen device using the above-described liquid supply device that pushes out the ink from the hole, and the liquid movement regulating member is prevented from being stirred while the ink collides with the squeegee and rebounds. It is a thing to do.

  According to the liquid supply device of the present invention, the liquid movement restricting member restricts the movement of the liquid so that the liquid is retained in the space in the moving direction downstream side of the contact portion of the squeegee with the plate material. However, it is possible to greatly suppress the foaming caused by the air inside, so that the liquid pushed out from the hole of the plate material can be made less likely to be uneven, and the liquid can be supplied to the surface of the object evenly. Can do.

It is a schematic block diagram of the principal part of main embodiment at the time of applying the liquid supply apparatus which concerns on this invention to a rotary screen apparatus. It is the figure seen from the arrow line II direction of FIG.

  Embodiments of a liquid supply apparatus according to the present invention will be described with reference to the drawings. However, the liquid supply apparatus according to the present invention is not limited to only the following embodiments described with reference to the drawings.

[Main embodiments]
A main embodiment when the liquid supply apparatus according to the present invention is applied to a rotary screen apparatus will be described with reference to FIGS.

  As shown in FIG. 1, a rotary screen 120 that is rotatably supported is in contact with an impression cylinder 110 that is rotatably supported and detachably holds a target sheet on an outer peripheral surface. The screen 120 has the following structure.

  As shown in FIGS. 1 and 2, a hollow screen 121 in which a thin screen (plate material) formed with a plurality of small holes corresponding to a pattern is formed in a cylindrical shape and rotatably supported is provided with a shaft of the hollow cylinder 121. A support shaft 122 is disposed with its longitudinal direction along the direction. A bracket 123 is provided on the support shaft 122 along the longitudinal direction of the support shaft 122. The bracket 123 has a base end side of a plate-like squeegee 124 that is oriented in the longitudinal direction along the axial direction of the hollow body 121 and is fixedly supported by a bolt 126 via a fixing plate 125. The position is set so that the front end is brought into contact with the inner peripheral surface (the other surface) of the hollow body 121.

  The surface of the squeegee 124 on the upstream side in the rotational direction of the hollow drum 121, that is, the surface on the downstream side in the movement direction of the squeegee 124 in the relative movement between the squeegee 124 and the hollow drum 121 (right side in FIG. 1). Near the base end (upward in FIG. 2), the space upstream of the rotational direction of the contact portion of the squeegee 124 with the hollow body 121, that is, the downstream side of the relative movement of the squeegee 124 in the moving direction. A restricting plate 127, which is a liquid movement restricting member that covers 121a, opens so that only a small portion of the opening formed by the squeegee 124 and the hollow body 121 of the space 121a is open and closes most of the opening. The end side (left side in FIG. 1) is attached without a gap, and the tip side (right side in FIG. 1) has a gap without contacting the inner peripheral surface of the hollow cylinder 121. And it extends toward the inner peripheral surface of the hollow cylinder 121.

  In the connection hole formed so as to communicate between the one surface side and the other surface side in the middle of the regulation plate 127 in the longitudinal direction, the tip end side of the ink feeding pipe 129 for feeding the ink 1 as a liquid is provided. It is connected. The base end side of the ink feeding pipe 129 is connected to an ink feeding apparatus (not shown) installed outside the hollow cylinder 121, and the ink feeding pipe is operated by operating the ink feeding apparatus. The ink 1 can be fed into the space 121 a on the inner peripheral surface (the other surface) side of the hollow cylinder 121 via the 129.

  In the present embodiment, the ink supply pipe 129, the ink supply device, and the like constitute liquid supply means.

  In the rotary screen device 100 according to this embodiment, the ink feeding device is operated to feed the ink 1 into the space 121a of the hollow cylinder 121 through the ink feeding pipe 129. At the same time, when the pressure drum 110 and the hollow drum 121 of the rotary screen 120 are rotated, the squeegee 124 supplies the ink 1 fed into the space 121 a of the hollow drum 121 to the hollow drum 121. The ink 1 can be screen-printed on the surface of the sheet held by the pressure drum 110 and in contact with the outer peripheral surface (one surface) of the hollow cylinder 121 by extruding from the hole to the outer peripheral surface (one surface).

  At this time, if the hollow cylinder 121 of the impression cylinder 110 and the rotary screen 120 is rotated at a high speed to perform high-speed screen printing, the restriction plate 127 causes the ink 1 to enter the space 121 a of the hollow cylinder 121. The movement of the ink 1 to the upstream side in the rotation direction of the hollow cylinder 121, that is, the downstream side in the movement direction of the squeegee 124 in the relative movement is restricted so that the ink 1 Since it is possible to suppress large agitation while colliding and rebounding, it is possible to greatly suppress the ink 1 from being embraced with air and foaming.

  Therefore, according to the rotary screen device 100 according to the present embodiment, it is possible to make the ink 1 pushed out from the hole of the hollow cylinder 121 less likely to be uneven, so that the ink 1 is printed on the surface of the sheet without unevenness. Therefore, it is possible to prevent a decrease in print quality.

  In addition, since the base end side of the restriction plate 127 is extended so as to be connected to the squeegee 124 without a gap, the ink is interposed between the squeegee 124 and the base end side of the restriction plate 127. 1 can be reliably kept in the space 121a without leaking.

  Further, since the front end side of the regulating plate 127 is set to have a gap without contacting the inner peripheral surface of the hollow cylinder 121, when performing screen printing or against the impression cylinder 110, It is possible to prevent the hollow body 121 from being damaged when the rotary screen 120 is moved (bore removal, body insertion).

[Other Embodiments]
In the above-described embodiment, by operating the ink feeding device, the ink 1 enters the space 121a on the inner peripheral surface (the other surface) side of the hollow cylinder 121 via the ink feeding pipe 129. However, as another embodiment, the ink feeding pipe 129, the ink feeding device, etc. are omitted. For example, before starting the printing operation, the operator can control the squeegee 124 and the regulation. The ink 1 may be supplied in advance to the space 121a between the plate 127 with a handle or the like so as to correspond to the space 121a.

  In the above-described embodiment, the restriction plate 127 is attached to the squeegee 124 and fixedly supported. However, as another embodiment, for example, a support shaft is separately provided inside the hollow body 121. The restriction plate 127 may be fixedly supported on the support shaft.

  At this time, a gap is provided between the squeegee 124 and the squeegee 124 so that the ink 1 can be reliably retained in the space 121a without leaking from between the base end side of the restricting plate 127. When the base end side of the restricting plate 127 is set so as to be connected without having any, and when screen printing is performed or when the rotary screen 120 is moved (barreled or barreled) with respect to the impression cylinder 110 In order to prevent the hollow body 121 from being damaged, if the front end side of the restricting plate 127 is set so as to have a gap without contacting the inner peripheral surface of the hollow body 121, Is preferred.

  In the above-described embodiment, the case of the rotary screen device 100 that screen-prints the ink 1 on the surface of the sheet has been described. However, the liquid supply device according to the present invention is not limited to this, for example, on the surface of the web. Lithographic screen devices that perform screen printing of ink and varnish screen coating on the surface of sheets and webs, such as rotary screen devices that screen-print ink and rotary screen devices that screen-coat varnish on the surface of sheets and webs And a liquid supply device that extrudes liquid from the hole of the plate material via the squeegee and supplies the liquid to the surface of the object, and can be applied in the same manner as in the above-described embodiment.

  Since the liquid supply apparatus according to the present invention can supply the liquid evenly onto the surface of the object, for example, a rotary that performs ink printing or varnish coating on the surface of a sheet or web from a rotary screen via a squeegee. If applied to a screen device, it can be used extremely beneficially in the printing industry and the like.

DESCRIPTION OF SYMBOLS 1 Ink 100 Rotary screen apparatus 110 Pressure drum 120 Rotary screen 121 Hollow cylinder 121a Space 122 Support shaft 123 Bracket 124 Squeegee 125 Fixing plate 126 Bolt 127 Restriction plate 129 Ink supply pipe

Claims (4)

A plate material in which one surface is brought into contact with the surface of the object and a plurality of holes are formed,
A squeegee that abuts against the other surface of the plate material and pushes the liquid fed to the other surface of the plate material to the surface of the object from the hole;
The moving direction of the contact portion of the squeegee with the plate material disposed on the downstream side of the moving direction of the squeegee in the relative movement of the plate material and the squeegee when the liquid is pushed out from the hole of the plate material A liquid movement regulating member that regulates the movement of the liquid so as to keep the liquid in the downstream space ;
The liquid supply device, wherein the liquid movement restricting member is disposed so as to have a gap without contacting the plate material . The liquid supply apparatus according to claim 1,
The liquid supply restricting member covers at least a part of the space. The liquid supply apparatus according to claim 1 or 2,
The liquid supply apparatus, wherein the liquid movement restricting member is extended so as to be connected to the squeegee without a gap. An impression cylinder that is rotatably supported and holds a sheet as an object on the outer peripheral surface;
A hollow cylinder that is rotatably supported so as to be in contact with the impression cylinder and has a cylindrical screen as the plate material;
With
The squeegee is disposed inside the hollow cylinder so as to face the longitudinal direction along the axial direction of the hollow cylinder, and abuts against the inner peripheral surface of the hollow cylinder to push out liquid ink from the hole. Is
A rotary screen device using the liquid supply device according to any one of claims 1 to 3,
The rotary screen device, wherein the liquid movement restricting member suppresses stirring while ink collides with the squeegee and rebounds .

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