JP2019209594A - Transport device, liquid discharging device - Google Patents

Abstract

To reduce occurrence of jam.SOLUTION: A blower unit 311, a radiation heater 312, and a guard member 316 are located in a chamber 310 of a drying mechanism part 31, a sheet material P is carried and conveyed on a conveyance surface 326 of a conveyor belt 321, and a height of an inlet 314 of the chamber 310 from the conveyance surface 326 and height of an outlet 315 of the chamber 310 from the conveyance surface 326 are represented by Ha and Hb, respectively. Further, when a height of the guide member 316 in the chamber 310 from the conveyance surface 326 is represented by Hc, a relationship of Ha<Hc<Hb is satisfied.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a transport device and a device for discharging a liquid.

  2. Description of the Related Art Some apparatuses for discharging a liquid that performs printing or the like by applying a liquid to a sheet material include a conveying device including a drying unit that dries the sheet material to which the liquid is applied.

  2. Description of the Related Art Conventionally, for example, a drying conveyance unit that conveys a recording medium and a blower unit that blows air on the conveyed recording medium, and the blower unit has a blower surface that includes the blower port formed of a plurality of holes. In addition, a drying apparatus is known in which the distance between the air blowing surface and the recording medium conveyance surface (holding surface) is substantially constant (Patent Document 1).

JP 2012-206304 A

  By the way, when the gap between the entrance and the exit of the transport device is a substantially constant height, there is a problem that a transport failure such as a jam occurs when a sheet material having an abnormality such as a leading end passes through the entrance.

  The present invention has been made in view of the above problems, and an object thereof is to reduce jamming of a sheet material.

In order to solve the above-described problem, a transport device according to the present invention includes:
Having an inlet and outlet for the sheet material,
The height of the entrance from the conveying surface of the sheet material is Ha,
When the height from the conveyance surface of the sheet material of the outlet is Hb,
The configuration is such that Ha <Hb.

  According to the present invention, jamming of a sheet material can be reduced.

It is a schematic explanatory drawing of the printing apparatus as an apparatus which discharges the liquid which concerns on 1st Embodiment of this invention. It is principal part plane explanatory drawing of a discharge unit. It is side surface explanatory drawing of the conveying apparatus which concerns on 1st Embodiment of this invention. It is side surface explanatory drawing of the conveying apparatus which concerns on 2nd Embodiment of this invention. It is side surface explanatory drawing of the conveying apparatus which concerns on 3rd Embodiment of this invention. It is side surface explanatory drawing of the conveying apparatus which concerns on 4th Embodiment of this invention. It is a plane explanatory view of the 1st example of a guard member. It is a plane explanatory view of the 2nd example of a guard member. It is a plane explanatory view of the 3rd example of a guard member.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. First, a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic explanatory diagram of a printing apparatus as an apparatus for ejecting liquid according to the embodiment.

  The printing apparatus 1 includes a carry-in unit 10, a printing unit 20, a drying unit 30, and a carry-out unit 40. The printing apparatus 1 applies liquid to the sheet material P, which is a sheet-like member carried in from the carry-in unit 10, by applying a liquid in the printing unit 20, and the liquid adhered to the sheet material P in the drying unit 30. After drying, the sheet material P is discharged to the carry-out unit 40.

  The carry-in unit 10 includes a carry-in tray 11 on which a plurality of sheet materials P are stacked, a feeding device 12 that separates and feeds the sheet materials P from the carry-in tray 11 one by one, and a resist that feeds the sheet material P to the printing unit 20. A roller pair 13 is provided.

  As the feeding device 12, any feeding device such as a device using a roller or a roller or a device using air suction can be used. After the leading edge of the sheet material P sent out from the carry-in tray 11 by the feeding device 12 reaches the registration roller pair 13, the registration roller pair 13 is driven at a predetermined timing to be sent out to the printing unit 20.

  The printing unit 20 includes a conveyance drum 21 that is a conveyance unit that conveys the sheet material P supported on the outer peripheral surface, and a liquid ejection unit 22 that ejects liquid toward the sheet material P supported on the conveyance drum 21. ing.

  The printing unit 20 includes a transfer cylinder 24 that receives the fed sheet material P and passes it to the transport drum 21, and a transfer cylinder 25 that transfers the sheet material P transported by the transport drum 21 to the drying unit 30. .

  The leading end of the sheet material P conveyed from the carry-in unit 10 to the printing unit 20 is gripped by a sheet gripper provided on the surface of the transfer cylinder 24 and is conveyed along with the rotation of the transfer cylinder 24. The sheet material P conveyed by the transfer drum 24 is transferred to the conveyance drum 21 at a position facing the conveyance drum 21.

  A sheet gripper is also provided on the surface of the transport drum 21, and the leading end of the sheet material P is gripped by the sheet gripper. A plurality of suction holes are dispersedly formed on the surface of the transport drum 21, and a suction airflow is generated in each suction hole toward the inside of the transport drum 21 by the suction device 26.

  The sheet material P transferred from the transfer drum 24 to the conveyance drum 21 is gripped at the tip by the sheet gripper, and is adsorbed on the surface of the conveyance drum 21 by the suction airflow, and is conveyed along with the rotation of the conveyance drum 21. Is done.

  The liquid discharge unit 22 includes a discharge unit 23 (23A, 23B, 23C, 23D) as a liquid application unit. For example, the discharge unit 23A is a cyan (C) liquid, the discharge unit 23B is a magenta (M) liquid, the discharge unit 23C is a yellow (Y) liquid, and the discharge unit 23D is a black (K) liquid. Discharge each. If necessary, a discharge unit that discharges a special liquid such as white, gold, silver, or a treatment liquid such as a surface coating liquid may be provided.

  The discharge operation of each discharge unit 23 of the liquid discharge unit 22 is controlled by a drive signal corresponding to print information. When the sheet material P carried on the transport drum passes through a region facing the liquid ejection unit 22, the liquid of each color is ejected from the ejection unit 23, and an image corresponding to the print information is printed.

  The drying unit 30 transports the drying unit 31 for drying the liquid adhered on the sheet material P in the printing unit 20 and the sheet material P transported from the printing unit 20 in a sucked state (suction transport). And a suction conveyance mechanism section 32.

  The sheet material P conveyed from the printing unit 20 is received by the suction conveyance mechanism unit 32, then conveyed so as to pass through the drying mechanism unit 31, and delivered to the carry-out unit 40.

  When passing through the drying mechanism 31, the liquid on the sheet material P is subjected to a drying process. As a result, liquid components such as moisture in the liquid evaporate, the colorant contained in the liquid is fixed on the sheet material P, and curling of the sheet material P is suppressed.

  The carry-out unit 40 includes a carry-out tray 41 on which a plurality of sheet materials P are stacked. The sheet material P conveyed from the drying unit 30 is sequentially stacked and held on the carry-out tray 41.

  In the printing apparatus 1, for example, a pre-processing unit that performs pre-processing on the sheet material P is disposed on the upstream side of the printing unit 20, or after the post-processing is performed on the sheet material P to which liquid has adhered. The processing unit can be disposed between the drying unit 30 and the carry-out unit 40.

  Examples of the pretreatment unit include a pre-treatment that applies a treatment liquid for reacting with the liquid and suppressing bleeding to the sheet material P. Further, as the post-processing unit, for example, a sheet reversing conveyance process for inverting the sheet printed by the printing unit 20 and sending it again to the printing unit 20 to print on both sides of the sheet material P, or a plurality of sheets What performs the process etc. to bind is mentioned.

  Next, an example of the discharge unit will be described with reference to FIG. FIG. 2 is an explanatory plan view of a main part of the discharge unit.

  The discharge unit 23 includes a plurality of liquid discharge heads (also simply referred to as “heads”) 100 provided with a nozzle row 101 in which a plurality of nozzles for discharging liquids are arranged on a base member 102 in a staggered manner. Are arranged side by side.

  Next, the conveying apparatus according to the first embodiment of the present invention that constitutes the drying unit 30 will be described with reference to FIG. FIG. 3 is an explanatory side view of the transfer device.

  The drying unit 30 is a transport device according to the present invention, and includes the drying mechanism unit 31 and the suction transport mechanism unit 32 as described above.

  The drying mechanism unit 31 is a drying unit, and includes a blower unit 311 as a blowing unit and a radiant heater 312 as a heating unit in an internal space 310 a of the chamber 310. The air blowing unit 311 blows air toward the sheet material P conveyed by the suction conveyance mechanism unit 32. The radiant heater 312 radiates radiant heat (for example, infrared rays) toward the sheet material P conveyed by the suction conveyance mechanism unit 32.

  The chamber 310 has an inlet 314 where the sheet material P conveyed by the suction conveyance mechanism unit 32 enters the internal space 310a from the printing unit 20 side, and an outlet 315 which exits to the discharge unit 40 side.

  In the drying mechanism unit 31, the sheet material P conveyed to the internal space 310 a of the chamber 310 is given to the sheet material P by radiant heat by the radiant heater 312 and blowing (air blowing) by the blower fan 311. Allow the liquid to dry.

  In addition, although it is set as the structure by which the several ventilation fan 311 was arrange | positioned along with the conveyance direction of the sheet material P here, the number and arrangement | positioning of the ventilation fan 311 are not limited to this. Further, although the plurality of radiation heaters 312 are arranged side by side in the conveying direction of the sheet material P, the number and arrangement of the radiation heaters 312 are not limited to this.

  The suction conveyance mechanism unit 32 has a conveyance belt 321 wound around a driving roller 322 and a driven roller 323, and conveys the sheet material P carried on the surface of the conveyance belt 321 by the circumferential movement of the conveyance belt 321. Transport in the direction (arrow direction).

  The conveying belt 321 has a plurality of minute through holes (suction holes), and the sheet material P is adsorbed to the conveying belt 321 and conveyed by the suction mechanism 324. The conveyor belt 321 is disposed so that the upstream portion in the conveyance direction faces the transfer cylinder 25 of the printing unit 20. The sheet material P conveyed by the transfer cylinder 25 is transferred to the conveyance belt 321 and is carried on the surface of the conveyance belt 321.

  In the present embodiment, the surface of the transport belt 321 on the side facing the blower unit 311 and the radiation heater 312 of the drying mechanism unit 31 is the transport surface 326 of the sheet material P (hereinafter simply referred to as “transport surface 326”).

  In the internal space 310 a of the chamber 310 of the drying mechanism unit 31, a guard member 316 is disposed between the conveyance belt 321 constituting the conveyance surface 326, the blower unit 311, and the radiation heater 312. The guard member 316 prevents contact with the radiation heater 312 or the like when the sheet material P is lifted from the conveyance belt 321.

  In the present embodiment, the guard member 316 is disposed in parallel with the conveyance surface 326 by the conveyance belt 321.

  Here, the height of the inlet 314 of the chamber 310 from the conveying surface 326 (the surface of the conveying belt 321) is Ha, and the height of the outlet 315 of the chamber 310 from the conveying surface 326 (the surface of the conveying belt 321) is Hb. Further, the height from the conveyance surface 326 (the surface of the conveyance belt 321) of the guard member 316 in the chamber 310 is defined as Hc.

  In the present embodiment, the inlet height Ha, the guard member height Hc, and the outlet height Hc are in the following relationship.

  (1) The relationship is Ha <Hb. Thereby, when the sheet material P having an abnormality such as a previous fold passes through the inlet 314, it is possible to reduce the occurrence of a jam without passing through the outlet 315.

  (2) Ha <Hc. Accordingly, it is possible to reduce the occurrence of a jam due to contact with the guard member 316 when the sheet material P having an abnormality such as a previous fold passes through the inlet 314.

  (3) The relationship is Hc <Hb. Thereby, when the sheet material P having an abnormality such as a previous fold passes through the guard member 316, it is possible to reduce the occurrence of a jam without passing through the outlet 315.

  (4) From the above (1) to (3), the relationship Ha <Hc <Hb is established. Thereby, when the sheet material P having an abnormality such as a previous fold passes through the inlet 314, it is possible to reduce the occurrence of a jam due to being in contact with the guard member 316 or being unable to pass through the outlet 315.

  Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 4 is an explanatory side view of the transport apparatus according to the embodiment.

  In the present embodiment, the guard member 316 is disposed to be inclined in the height direction with respect to the transport surface 326.

  That is, when the height from the conveyance surface 326 (the surface of the conveyance belt 321) of the upstream end of the guard member 316 is Hc1, and the height from the conveyance surface 326 (the surface of the conveyance belt 321) of the downstream end is Hc2. , The height Hc2 is higher than the height Hc1 (Hc1 <Hc2).

  As a result, it is possible to reduce the occurrence of a jam due to contact between the guard member 316 and the sheet material P having an abnormality such as a fold that passes below the guard member 316.

  The relationship between the heights Hc1 and Hc2 of the guard member 316, the height Ha of the inlet 314, and the height Hb of the outlet 315 is as follows.

(1) The relationship is Ha <Hc1 <Hc2. Accordingly, it is possible to reduce the occurrence of a jam due to contact with the guard member 316 when the sheet material P having an abnormality such as a previous fold passes through the inlet 314.

(2) The relationship is Hc1 <Hc2 <Hb. Thereby, when the sheet material P having an abnormality such as a previous fold passes through the guard member 316, it is possible to reduce the occurrence of a jam without passing through the outlet 315.

(3) From the above (1) and (2), the relationship is Ha <Hc1 <Hc2 <Hb. As a result, when the sheet material P having an abnormality such as a previous fold passes through the inlet 314, it is possible to reduce the occurrence of jam due to contact with the guard member 316, and jam occurs without passing through the outlet 315. Can be prevented.

  Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 5 is an explanatory side view of the transport apparatus according to the embodiment.

  In this embodiment, a roller transport mechanism is used instead of the belt transport mechanism. That is, on the outside of the chamber 310 of the drying mechanism unit 31, the transport roller 332, the counter roller 338 facing the transport roller 332, the transport roller 333, and the counter roller 339 are disposed.

  A platen member 334 for guiding the sheet material P is disposed in the chamber 310, and the sheet material P is guided by the platen member 334.

  In the present embodiment, the surface of the platen member 334 is used as the conveying surface 326, and the occurrence of jam is reduced by setting the relationship among the heights Ha, Hb, Hc, Hc1, and Hc2 as described in the above embodiments. be able to.

  Even with such a configuration, it is possible to obtain the same functions and effects as in the above embodiments.

  Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 6 is an explanatory side view of the transport apparatus according to the embodiment.

  In the present embodiment, normally open shutter members 317 and 318 for opening and closing the inlet 314 and the outlet 315 of the chamber 310 of the drying mechanism 31 are disposed. The shutter members 317 and 318 are arranged so as to be movable up and down in the direction of the arrow, but may be a mechanism that opens and closes by rotation.

  With this configuration, when an abnormality (for example, smoke, ignition, etc.) of the sheet material P occurs in the chamber 310, the shutter members 317 and 318 are closed to confine the abnormality in the chamber 310 and affect the outside. It can be prevented from reaching.

  Next, different examples of the guard member in each of the above embodiments will be described with reference to FIGS.

  The first example shown in FIG. 7 is an example in which a metal mesh member using expanded metal is used for the guard member 316. The second example shown in FIG. 8 is an example in which a glass fiber mesh member is used for the guard member 316.

  By using a mesh-like member for the guard member 316, the guard member 316 is not easily deprived of heat, and heat from the non-contact heat source can be efficiently applied to the sheet material P. It becomes difficult to generate and temperature uniformity can be ensured.

  The third example shown in FIG. 9 is an example in which a wire member is used for the guard member 316. Evidence of the wire member makes it difficult for the guard member 316 to take heat away from the mesh member, so that heat from the non-contact heat source can be efficiently applied to the sheet material P, and unevenness of the applied heat occurs. Temperature uniformity can be ensured. Furthermore, by arranging the wire member along the conveying direction, it is possible to reduce the occurrence of a jam due to the leading end of the sheet material P being caught.

  In each of the above embodiments, the example in which the conveyance device includes the drying unit has been described. However, the present invention can also be applied to a conveyance device that does not include the drying unit.

  In the present application, the liquid to be ejected is not particularly limited as long as it has a viscosity and surface tension that can be ejected from the head, and the viscosity becomes 30 mPa · s or less at room temperature, normal pressure, or by heating and cooling. It is preferable. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, functional materials such as polymerizable compounds, resins, and surfactants, and biocompatible materials such as DNA, amino acids, proteins, and calcium. , Edible materials such as natural pigments, etc., suspensions, emulsions, etc. These include, for example, inkjet inks, surface treatment liquids, components of electronic elements and light emitting elements, and formation of electronic circuit resist patterns It can be used in applications such as a liquid for use, a material liquid for three-dimensional modeling.

  As energy generation sources for discharging liquid, piezoelectric actuators (laminated piezoelectric elements and thin film piezoelectric elements), thermal actuators using electrothermal transducers such as heating resistors, electrostatic actuators consisting of a diaphragm and counter electrode are used. To be included.

The “apparatus for ejecting liquid” includes an apparatus that includes a liquid ejection head and that ejects liquid by driving the liquid ejection head. The apparatus for ejecting a liquid includes not only an apparatus capable of ejecting a liquid to an object to which the liquid can adhere, but also an apparatus for ejecting the liquid into the air or liquid.

  This “apparatus for discharging liquid” may include means for feeding, transporting, and discharging a liquid to which liquid can adhere, as well as a pre-processing apparatus and a post-processing apparatus.

  For example, as a “liquid ejecting device”, an image forming device that forms an image on paper by ejecting ink, a powder is formed in layers to form a three-dimensional model (three-dimensional model) There is a three-dimensional modeling apparatus (three-dimensional modeling apparatus) that discharges a modeling liquid onto the powder layer.

  Further, the “apparatus for ejecting liquid” is not limited to an apparatus in which significant images such as characters and figures are visualized by the ejected liquid. For example, what forms a pattern etc. which does not have a meaning in itself, and what forms a three-dimensional image are also included.

  The above-mentioned “applicable liquid” means that the liquid can be attached at least temporarily and adheres and adheres, or adheres and penetrates. Specific examples include recording media such as paper, recording paper, recording paper, film, and cloth, electronic parts such as electronic substrates and piezoelectric elements, powder layers (powder layers), organ models, and test cells. Yes, unless specifically limited, includes everything that the liquid adheres to.

  The material of the above-mentioned “material to which liquid can adhere” is not limited as long as liquid such as paper, thread, fiber, fabric, leather, metal, plastic, glass, wood, ceramics can be adhered even temporarily.

  In addition, the “device for ejecting liquid” includes a device in which the liquid ejection head and the device to which the liquid can adhere move relatively, but is not limited thereto. Specific examples include a serial type apparatus that moves the liquid discharge head, a line type apparatus that does not move the liquid discharge head, and the like.

  In addition, as the “device for ejecting liquid”, other than the above, a treatment liquid coating apparatus that ejects a treatment liquid onto a sheet in order to apply the treatment liquid to the surface of the sheet for the purpose of modifying the surface of the sheet, There is an injection granulation apparatus that granulates raw material fine particles by spraying a composition liquid in which raw materials are dispersed in a solution through a nozzle.

  Note that image formation, recording, printing, printing, printing, modeling, etc. are all synonymous.

DESCRIPTION OF SYMBOLS 1 Printing apparatus 10 Carry-in part 20 Printing part 21 Conveyance drum 22 Liquid discharge part 23 Discharge unit 25 Transfer cylinder 30 Drying part (conveyance apparatus)
31 Drying Mechanism Unit 32 Suction and Transport Mechanism Unit 310 Chamber 311 Blower Unit 312 Radiation Heater 314 Inlet 315 Exit 316 Guard Member 320 Conveying Belt 326 Conveying Surface

Claims (12)

Having an inlet and outlet for the sheet material,
The height of the entrance from the conveying surface of the sheet material is Ha,
When the height from the conveyance surface of the sheet material of the outlet is Hb,
A transport apparatus characterized by having a relationship of Ha <Hb. Having an inlet and outlet for the sheet material,
Between the inlet and the outlet, a guard member is disposed above the conveying surface of the sheet material,
The height of the entrance from the conveying surface of the sheet material is Ha,
When the height from the conveyance surface of the sheet material of the guard member is Hc,
A transport apparatus characterized by having a relationship of Ha <Hc. Having an inlet and outlet for the sheet material,
Between the inlet and the outlet, a guard member is disposed above the conveying surface of the sheet material,
The height of the outlet from the conveying surface of the sheet material is Hb,
When the height from the conveyance surface of the sheet material of the guard member is Hc,
A conveying apparatus characterized by having a relationship of Hc <Hb. Having an inlet and outlet for the sheet material,
Between the inlet and the outlet, a guard member is disposed above the conveying surface of the sheet material,
The height of the entrance from the conveying surface of the sheet material is Ha,
The height of the outlet from the conveying surface of the sheet material is Hb,
When the height from the conveyance surface of the sheet material of the guard member is Hc,
A transport apparatus characterized by having a relationship of Ha <Hc <Hb. The transport device according to claim 1, wherein the guard member is disposed in parallel to the transport surface. The guard member is disposed to be inclined with respect to the transport surface,
The height from the transport surface to the upstream end of the guard member is Hc1,
When the height from the transport surface to the downstream end of the guard member is Hc2,
Ha <Hc1 <Hc2
The conveying device according to claim 2 or 4, wherein The guard member is disposed to be inclined with respect to the transport surface,
The height from the transport surface to the upstream end of the guard member is Hc1,
When the height from the transport surface to the downstream end of the guard member is Hc2,
The conveying apparatus according to claim 3 or 4, wherein a relationship of Hc1 <Hc2 <Hb is satisfied. The guard member is disposed to be inclined with respect to the transport surface,
The height from the transport surface to the upstream end of the guard member is Hc1,
When the height from the transport surface to the downstream end of the guard member is Hc2,
5. The transport apparatus according to 4, wherein a relationship of Ha <Hc1 <Hc2 <Hb is satisfied. The transport device according to claim 1, wherein the guard member is a mesh member. The transport device according to claim 1, wherein the guard member is a wire member. The transport apparatus according to claim 1, further comprising a shutter member that opens and closes the inlet and the outlet. A liquid applying means for applying a liquid to the sheet material;
An apparatus for ejecting liquid, comprising: the conveying apparatus according to claim 1, which conveys the sheet material to which the liquid is applied by the liquid applying unit.

Images