JPH10250044A - Rotary screen textile printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a cleaning time, to labor-save cleaning and to improve production efficiency of a textile printer by disposing a cleaning water jet unit for reciprocating in a cavity of a rotary screen, and directing a nozzle of the jet unit toward an inner wall of the screen, thereby enhancing cleaning effect of the screen. SOLUTION: An output from a control circuit is input to a solenoid valve and a motor 43, and the valve is switched, and the motor 43 is operated. When the valve is opened, a tube is communicated, pressurized cleaning water is supplied to a hose 38 via a tube 45 from a cleaning water source, and the water is injected from a nozzle 36 to an inner all of a rotary screen 1 to clean it. The cleaned drain is captured to a capturing trough 25 disposed at a lower side of a belt 2. Meanwhile, a cleaning water injector 30 is at least once reciprocated substantially over an overall length of the screen 1 in a lengthwise direction in an oblique state by an operation of the motor 43 while injecting the water from the nozzle 36.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the cleaning of a rotary screen of a rotary screen printing machine, and more particularly to the cleaning of a rotary screen printing machine. It is also trying to increase.

[0002]

2. Description of the Related Art In rotary screen printing, it is necessary to wash the rotary screen every time a printed pattern or a printed color is changed.

Heretofore, in a typical rotary screen printing machine, it has been necessary to remove the rotary screen from the printing machine in order to clean the rotary screen, which requires a great deal of labor and time. Then, after the washing, the dried rotary screen needs to be mounted again on the printing machine, and in this respect too much labor and time are spent.
For this reason, the productivity must be considerably reduced, and this is a serious problem particularly in the case of printing various types in small lots, multiple colors, and colors. Furthermore, as described above, removing the rotary screen prior to washing, since the removal is performed in a state where the printing paste is adhered, the printing paste is dripped from the rotary screen, which causes soiling around. .

[0004] Conventionally, as a rotary screen printing machine that solves the above-mentioned problem, the one disclosed in Japanese Patent Application Laid-Open No. 8-276564 is known. This is to inject the washing water into the rotary screen by setting the rotary screen, the cloth transporting endless belt, the printing table, and the like to be inclined with respect to the belt width direction. Cleaning can be performed by draining water from the inclined lower end side of the printing machine and collecting the collected water in the collecting gutter, and there is no need to remove the rotary screen to be washed from the printing machine.
However, in this case, in order to inject the washing water into the rotary screen, a hollow bar extending in the length direction of the inner space is provided in the inner space of the rotary screen, and a space is provided in the wall surface of the hollow bar in the length direction. Water is discharged from a number of small holes that have been drilled. In this method, there is a problem that a favorable cleaning result is not always obtained as described below.

[0005] a) In the portion of the rotary screen facing the non-perforated portion between the small holes of the hollow bar, the rate of exposure to water discharge from the hollow bar is low, and the rotary screen tends to be insufficiently cleaned.

[0006] b) The washing water discharged from the small holes of the hollow bar produces a difference in water pressure or water force between the front end side and the rear end side of the hollow bar, and the cleaning effect is also different. This means that if the screen mesh at the site where the weak water is discharged is washed until the required degree of cleaning is obtained, the screen mesh at the site where the strong water is discharged will result in excessive cleaning. Conversely, if the cleaning degree is suitable for cleaning the latter part, it means that an undesirable situation of insufficient cleaning of the former part is caused.

C) The funnel-shaped end rings at both ends of the rotary screen are difficult to clean.

D) Slime or other foreign matter easily clogs the small holes of the hollow bar, and the washing water is not released.

E) Draining of washing water requires wiping, which is not efficient, and drying is also inefficient.

F) For these reasons, it is difficult to achieve the washing and the accompanying treatment in a short time.

[0011]

An object of the present invention is to solve these problems. That is, the main object of the present invention is to improve the cleaning effect of the rotary screen in the rotary screen printing machine, shorten the cleaning time, save the cleaning, and improve the production efficiency of the printing machine.

[0012]

According to the present invention, there is provided the following constitution:
2. And 3. Related to a rotary screen printing machine.

1. A washing water injector that performs at least one reciprocating motion over substantially the entire length in the length direction of the inner space is arranged in the inner space of the rotary screen that is set to be inclined low from one end to the other end, A rotary screen printing machine, wherein the nozzle of the washing water injector is directed to the inner wall surface of the rotary screen.

2. A washing water injector that performs at least one reciprocating motion over substantially the entire length in the length direction of the inner space is arranged in the inner space of the rotary screen that is set to be inclined low from one end to the other end, The nozzle of the washing water injector is directed to the inner wall surface of the rotary screen, and the starting end of a pipe communicating with the water supply port of the washing water injector is switchably connected to a washing water source and a compressed air source. Characteristic rotary screen printing machine.

3. The rotary screen printing press according to the above configuration 1 or 2, wherein the reciprocating motion of the washing water injector in the space inside the rotary screen is stopped for a short time at the starting point and the turning point.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

A plurality or one of the rotary screens 1 arranged in parallel at a predetermined interval, an endless belt 2 for conveying a cloth to be dyed,
Driving rollers (not shown) for the printing table 3 and the endless belt 2 are mounted on the machine bases 4 and 5 at a required angle in the width direction of the printing machine or the endless belt 2.

In the inside of the rotary screen 1, a dye-purified water jet 30 is arranged. The cleaning water injector 30 is reciprocated at least once over substantially the entire length in the length direction of the inner space of the rotary screen 1. The nozzle 36 of the washing water injector 30 is directed to the inner wall surface of the rotary screen 1. In the illustrated example, the washing water injector 30 includes a manifold 31 mounted on a carriage 32, and a nozzle 36 is provided on the inner wall surface of the rotary screen 1 at the tip of downward branch pipes 35, 35 on both left and right sides of the manifold 31 in FIG. It is attached downward. A preferred example of the nozzle 36 is a type whose orientation can be changed. If the orientation of the nozzle 36 can be changed, the injection of the cleaning water onto the inner wall surface of the rotary screen 1 and the injection of the compressed air for draining, which will be described later, can be made in a suitable direction according to various situations. The nozzle 36 is desirably a wide-area injection type in order to perform cleaning by jetting of cleaning water and drainage by jetting compressed air over a wide range. The carriage 32 is mounted on a rectangular bar 10 extending inside the rotary screen 1, is movable back and forth with the bar 10 as a guide rail, and is prevented from rotating in the direction around the axis of the rotary screen 1. Has become. Carriage 3
2 has a wheel 33 that rolls on the bar 10 and a slide shoe 34 that slides on the bar 10. Carriage 3
2 In other words, if the washing water injector 30 is detented in the axial direction of the screen 1, the hose 38 in the rotary screen 1 will not be twisted, and the reciprocating movement of the washing water injector 30 can be performed smoothly.

A hose winding device 40 is arranged on the side of the machine base 5. The hose winding device 40 includes a gantry 41, a reel 42 supported by the gantry 41, and a reversible geared motor 43 for rotating the reel 42. The motor 43 is
It is preferable that the cleaning water injector 30 be of a variable speed type in order to change a moving speed, which will be described later, of the cleaning water injector 30 as necessary. On the reel 42 of the hose winding device 40, the other end of a hose 38 having one end communicating with a water supply port 31 a of the washing water injector 30 via a joint 37 is wound. The winding start end of the hose 38 on the reel 42 is connected to the mouth end of the rotary joint 44 that forms the axis of the reel 42 on the side corresponding to the hose winding start end. A pipe 45 is connected to the other end of the rotary joint 44. The intermediate portion of the hose 38 extending from the reel 42 is turned by a pulley 46 disposed at a fixed position. The pulley 46
Is supported by a pivot 47 at the other end of an arm 48 having one end connected to the bar 10.

One end of a pipe 50 is connected to the pipe 45, and the other end of the pipe 50 is connected to a connection point between a water supply pipe Ia and a compressed air supply pipe IIa. The starting end of the water supply pipe Ia is connected to a washing water source I, for example, a washing water feed pump via an electromagnetic valve 51, and the starting end of the compressed air supply pipe IIa is connected to a compressed air source II, for example, an air compressor via an electromagnetic valve 52. It is connected. Pipes Ia and IIa are check valves 5
3

The hose 38 is connected to the reel 4 by the motor 43.
In the forward rotation of No. 2, the reel is wound up on the reel 42, and is wound in the reverse rotation. By the rewinding, the washing water injector 30 moves to the right side in FIG. 1, that is, the Y side by gravity, and moves to the left side in FIG.

According to a preset place, the washing water injector 3
Reference numeral 0 denotes a starting point or starting point of movement at a high-side end of the rotary screen 1, for example, a position at the following position X, and a turn-back point at a low-side end, for example, a position Y at the following position.

In cleaning, the solenoid valve 52 is closed and the solenoid valve 51 is opened. The control of the opening and closing of these solenoid valves may be performed by appropriate means, for example, the following specifications together with the operation control of the motor 43.

The solenoid valves 51, 52,
The motor 43 is connected. When the control circuit A is switched on, the output from the control circuit A enters the solenoid valves 51 and 52 and the motor 43, the solenoid valve 51 opens, and the solenoid valve 52 closes.
The motor 43 operates.

When the solenoid valve 51 is opened, the pipe Ia is opened, pressurized cleaning water is supplied from the cleaning water source I to the hose 38 through the pipes Ia, 50 and 45, and the cleaning water is supplied from the nozzle 36 to the rotary screen 1. It is sprayed on the inner wall to clean it.
The washing drainage is collected by a collecting gutter 25 arranged on the lower side of the belt 2.
Collected in.

On the other hand, the washing water injector 30 injects washing water from the nozzle 36 and operates at least over the entire length in the longitudinal direction of the rotary screen 1 under the inclination by operating the motor 43. Reciprocated one time.

The range of reciprocation of the cleaning water injector 30 is not necessarily limited, but generally, the cleaning water injector 30 is connected to the end ring 1R on one end side of the rotary screen 1 in FIG. A range from the position X to the position Y in FIG. 1 is possible from the flange end) to the intermediate portion of the end ring 1R on the other end, and the vertical center line of the carriage 32.

The range of movement of the washing water injector 30 from the position X to the position Y can be determined by appropriate specifications, for example, in the following manner.

A control circuit A having a motor 43 connected to the output side
The counter incorporated in the motor 4 in the cleaning process
The number of pulses transmitted from the pulse generator PG is counted according to the number of rotations of 3, that is, the amount of movement of the washing water injector 30.

When the washing water injector 30 moves from the position X,
When the position Y is reached, the pulse count of the counter reaches a predetermined number, an output from the control circuit A is output to the motor 43, and the motor 43 is rotated in the reverse direction. This control is performed according to a program incorporated in the control circuit A. When the number of reciprocations of the washing water injector 30 reaches a predetermined number, the output from the control circuit A enters the solenoid valve 51 and the motor 43, and the solenoid valve 51
Is closed, and the motor 43 stops. When the motor stops, the washing water injector 30 is located at the position X according to a preset location. These controls are also performed according to a program incorporated in the control circuit A. FIG. 5 is a block diagram of a system for performing the above control.

At the time of cleaning the rotary screen 1, the rotary screen 1 and the endless belt 2 are preferably rotated. By doing so, as the rotary screen 1 rotates, the roller squeegee 11 in the rotary screen 1 rotates, which contributes to cleaning of the screen mesh of the rotary screen 1 and the roller squeegee 1
1 is also washed. In this case, if the printing table 3 is of an electromagnet type, it is more preferable to excite the electromagnet 3a. That is, by this excitation, the roller squeegee 11 is attracted by the electromagnet 3a with the interposition of the endless belt 2 and pressed against the inner wall surface of the rotary screen, thereby squeezing out the color paste and washing water in the rotary screen 1 to the outside.

When the cleaning of the rotary screen 1 is completed, the rotary screen 1 is then drained.
The conversion from the end of the washing to the draining may be controlled by appropriate specifications, for example, by the following means.

When the cleaning is completed, the output from the control circuit A enters the solenoid valve 52, the solenoid valve 52 is opened, and the pipe IIa is opened. This control is performed according to a program incorporated in the control circuit A. When the pipe IIa is opened, the compressed air is supplied from the compressed air source II to the hose 38 through the pipes IIa, 50 and 45, and the compressed air is jetted from the nozzle 36. With the injected compressed air, moisture or water droplets inside the rotary screen 1 are blown off and drained. Therefore, unlike the related art, there is no need to wipe off moisture. In addition, the nozzle 36 is cleaned by the injection of the compressed air, so that clogging due to scale or the like is avoided.

Another counter incorporated in the control circuit A controls the number of rotations of the motor 43 in the draining process, in other words, the amount of movement of the washing water injector (substantially compressed air injector in the draining process) 30. The number of pulses transmitted from the pulse generator PG is counted. When the washing water injector 30 moves from the position X and reaches the position of the position Y, the pulse count of the counter reaches a predetermined number, an output is input from the control circuit A to the motor 43, and the motor 43 is rotated reversely. .
This control is performed according to a program incorporated in the control circuit A. When the number of reciprocations of the washing water injector 30 reaches a predetermined number, the output from the control circuit A outputs the electromagnetic valve 52 and the motor 43.
Then, the solenoid valve 52 closes and the motor 43 stops.
When the motor stops, the washing water injector 30 is located at the position X according to a preset location. These controls are also performed by a program incorporated in the control circuit A.

A block diagram of a system for controlling the conversion from the end of the washing to the draining is shown in the washing water injector 3.
FIG. 5 shows a control system that defines a range between the position X and the position Y of 0, which is shown in duplicate in FIG.

In FIG. 5, C1 is a setter for setting the number of reciprocations of the washing water injector 30 in the washing process, and C2 is a compressed air injector in the draining process (also used as the washing water injector 30).
Is a setting device for setting the number of reciprocations.

Returning the washing water injector 30 to the position X,
Therefore, when stopping, the washing machine 30 does not hinder the printing. This is facilitated when the rotary screen 1 is replaced.

It is preferable that the setting of the number of reciprocations of the washing water injector 30 can be arbitrarily changed in accordance with the printing conditions, that is, the type of printing paste, viscosity, color shading, screen mesh of a rotary screen, and the like.

As described above, in the present invention, at least one reciprocation of the washing water injector reciprocates over substantially the entire length in the longitudinal direction of the rotary screen inside the inclined screen. The rotary screen is washed with water sprayed from the nozzle. For this reason, in combination with the fact that the nozzle of the washing water injector is directed to the inner wall surface of the rotary screen, it is possible to wash with substantially the same length of jet water uniformly over substantially the entire length of the inner space of the rotary screen, Effective cleaning results can be obtained, and the inner surface of the rotary screen including the end ring can be thoroughly cleaned. Position X,
At a point Y, when the washing water injector is stopped for a while,
The cleaning of the end ring location is better. In order to stop the washing water injector for a short time at the positions X and Y, a program for executing the washing water injector may be incorporated in the control circuit A and controlled by the program.

At the time of draining, the washing water injector that operates as a compressed air injector reciprocates at least one time over substantially the entire length of the inside of the rotary screen and injects compressed air. Draining of the rotary screen is performed well. Further, at the time of draining, the compressed air injected from the nozzle contributes to eliminating clogging of the nozzle due to water scale or the like. When the washing water injector is stopped for a short time at the positions X and Y, the drainage at the end ring is improved.

In the present invention, when the starting end of the pipe communicating with the water supply port of the washing water injector is connectable to a washing water source and a compressed air source, the system for injecting the washing water by switching the connection. However, it also doubles as a draining system by compressed air injection, which doubles its usefulness.

In the drawing, the support structure of the rotary screen 1 is in the following manner.

Bearings 6, 6 at both ends of the rotary screen 1
Are mounted on supports (not shown) on the machine bases 4, 5 so that the right bearing in FIG. 1 can be moved in the width direction of the printing press (left-right direction in FIG. 1). The end rings 1R, 1R of the rotary screen 1 are removably fitted in the bases 7, 7 rotatable about the internal axis, and the bases 7, 7 are rotatable.
A fin-shaped radially inward engaging protruding piece 71 is formed at the mouth end, and a fin-shaped radially outward engaging protruding piece 12 is formed at the mouth end of the end rings 1R, 1R. The set of the engaging projections 71, 12 on both sides of the rotary screen 1 are arranged in the same phase on each side. After rotating the rotary screen 1 with respect to the bases 7 and 7 to a phase at which the engagement projections 12 and 71 are disengaged, the right bearing 6 in FIG. 1 is moved rightward in FIG.
When the rotary screen 1 is moved rightward in FIG. 1 with respect to the base 7 on the opposite side, the end rings 1R, 1
The rotary screen 1 with R can be removed.

A sleeve-like support 60 is fitted to the movable bearing 6 so that a free end 61 at the right end of the bar 10 shown in FIG. 1 is fitted thereto. The free end of the bar 10 at the right end of FIG. 61 is fitted and supported so as to be removable. A portion of the bar 10 located outside the rotary screen 1 is pivotally connected to a bracket 8 on the machine base 5 by a pivot 9.

When the movable bearing 6 is removed from the end ring 1R by the rightward movement as shown above, the support 60 comes off from the right end of the bar 10. Then, the end ring 1R fitted to the end ring 1R is removed from the base 7 on the left side, and the bar 10 is rotated counterclockwise in FIG. Lifted by movement. When the rotary screen is raised to an appropriate height, the rotary screen 1 can be easily removed from the printing machine by using the bar 10 as a guide jig at that height. One end of the air cylinder 14 is pivotally connected to a bracket 22 on the machine base 5 by a pivot 13, and the tip of the plunger 14a is
The pivot 9 is pivotally connected by a pivot 16 at a position on the left side of FIG.

[0046]

As is clear from the above, the present invention enhances the effect of cleaning a rotary screen in a rotary screen printing machine, shortens the cleaning time, saves cleaning, and improves the production efficiency of the printing machine. The task achievement is achieved.

[Brief description of the drawings]

FIG. 1 is a view showing an example of a rotary screen printing machine according to the present invention, and is a longitudinal sectional view on a line passing through an axis of a rotary screen.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 shows an enlarged side view of the flush water injector.

FIG. 4 is a piping diagram of a cleaning water and compressed air supply system.

FIG. 5 is a block diagram of a control system according to the embodiment of the present invention.

FIG. 6 is a perspective view of an end ring at a mouth end of a rotary screen.

FIG. 7 shows a perspective view of a base.

[Explanation of symbols]

 I Wash Water Source II Compressed Air Source 1 Rotary Screen 30 Wash Water Injector 36 Nozzle

Claims (3)

[Claims] 1. A washing water jet which makes at least one reciprocating movement in the length direction of the inner space of the rotary screen substantially over its entire length in the inner space of the rotary screen which is arranged to be inclined downward from one end to the other end. A rotary screen printing machine, wherein a dispenser is arranged, and a nozzle of the washing water injector is directed to an inner wall surface of the rotary screen. 2. A washing water jet which makes at least one reciprocating movement in the longitudinal direction of the inner space of the rotary screen over substantially the entire length thereof in an inner space of the rotary screen which is arranged to be inclined downward from one end side to the other end side. A dispenser is disposed, a nozzle of the washing water injector is directed to an inner wall surface of the rotary screen, and a starting end of a pipe communicating with a water supply port of the washing water injector is switchably connectable to a washing water source and a compressed air source. A rotary screen printing machine characterized by the fact that it is made. 3. The reciprocating motion of the washing water injector in the rotary screen inside the rotary screen at the starting point and the turning point,
3. The rotary screen printing machine according to claim 1, wherein the rotary screen printing machine is stopped for a while.