JPH0523632A - Nozzle - Google Patents

Abstract

PURPOSE:To prevent an upward nozzle discharge opening from being dried during work interruption. CONSTITUTION:Around and in the lower part of an nozzle discharge opening 5 upward discharging liquid dissolved in solvent, such as adhesive or coating material is installed an enclosing wall 6 so that sealing fluid may be charged into the enclosing wall 6 to discharge it. At this time, the height of the enclosing wall 6 is nearly equal to that of the nozzle discharge opening 5. The sealing fluid is charged into the enclosing wall 6 by a work stoppage signal, and the fluid inside the enclosing wall 6 is discharged by a work start signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nozzle for ejecting a fluid in which a solvent such as glue or paint is dissolved upward, and more particularly to a nozzle for preventing clogging of an ejection port due to drying of the fluid when the ejection is interrupted.

When a printed sheet or a punched sheet has a three-dimensional structure such as a carton, a pasting process using glue is adopted. At this time, the gluing surface may be the lower surface. In such a case, as shown in FIG. 4, a thin (2-5 mm thick) disk called glue wheel 2 is filled with glue 4 called glue boat 3. It was dipped in a container and the glue 4 attached to the outer peripheral surface of the glue wheel 2 was applied to the lower surface of the sheet 1.

[0003]

The gluing position of cartons of various shapes in small quantities and in various types changes variously. Therefore, it is necessary to change and adjust the equipment of the glue wheel 2 and the glue ship 3, which takes time and effort. Further, if the rotation of the glue wheel 2 is increased in order to increase the gluing speed, the gluing becomes poor and the glue 4 becomes scattered. Moreover, partial gluing was difficult.

The present invention has been made in view of the above problems, and uses an upward nozzle to prevent clogging of the discharge port due to drying of the fluid when the discharge of the fluid dissolved in a solvent such as water is interrupted. The purpose is to provide.

[0005]

In order to achieve the above object, a surrounding wall is provided around and at the bottom of a nozzle discharge port for discharging a fluid upward, and a sealing fluid is filled and discharged in the surrounding wall. Is.

Further, the upper end of the surrounding wall is substantially level with the upper end of the nozzle discharge port.

Further, the sealing fluid is filled in the surrounding wall in response to the fluid discharge stop signal, and the sealing fluid in the surrounding wall is discharged in response to the fluid discharge start signal.

[0008]

[Function] When the discharge of the fluid such as water is interrupted by providing the surrounding wall around the discharge port and the bottom of the upward nozzle, the sealing fluid fills the surrounding wall and remains in the discharge port of the nozzle. The fluid is covered with a sealing fluid to shield it from the air to prevent it from drying and to prevent the nozzle outlet from being blocked due to the hardening of the fluid.

At this time, if the upper end of the surrounding wall and the upper end of the nozzle discharge port are set to substantially the same height, the filled sealing fluid rises due to surface tension and covers the nozzle discharge port, so that the fluid in the discharge port is blocked from the air. Prevents drying.

Further, when the sealing fluid is filled in the surrounding wall by the fluid discharge stop signal and is discharged by the fluid discharge start signal, the fluid seal of the nozzle discharge port and its release can be automatically performed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the examples, an example of glue is shown as a fluid dissolved in a solvent such as water, and an example of water is shown as a solvent. Also, the sealing fluid is water. FIG. 1 shows the configuration of the first embodiment, (a)
Shows a state in which the sheet 1 is pasted with a nozzle having the ejection port 5 directed upward. Reference numeral 6 denotes a surrounding wall provided around the nozzle discharge port 5 at the same height as the discharge port 5. Reference numeral 7 is an introduction path for supplying and discharging the sealing fluid to the portion constituted by the surrounding wall 6 and the discharge port 5. When the nozzle discharge port 5 and the box gluing surface are brought close to each other in order to accurately apply the glue to the set position of the gluing surface of a box or the like that runs at high speed, the tip height of the nozzle and the height of the surrounding wall 6 are Must be on the same plane.

(B) shows a state in which the discharge of the glue 4 is interrupted and the surrounding wall 6 is filled with water 8 from the introduction passage 7. The water 8 rises due to surface tension to cover the discharge port 5 and shield the glue 4 in the discharge port 5 from the air, so that the glue 4 solidifies and the discharge port 5
To prevent blockage.

FIG. 2 shows the configuration of the second embodiment of the present invention.
In this embodiment, a device for supplying water or glue to the nozzle of the first embodiment is also shown. The same reference numerals as those in FIG. 1 represent the same devices. Reference numeral 9 denotes an electromagnetic glue injection valve, which performs an operation of discharging or blocking the glue 4 supplied from the glue pump 10 from a nozzle according to an instruction from a control unit (not shown).

A water pump 11 is driven by air pressure and supplies water into the surrounding wall 6 from a water variable throttle valve 15. Water pump
Water is supplied to 11 from a water tank 12. The solenoid valve 13 supplies the pressurized air supplied from the air line 19 to the water pump 11. The solenoid valve 14 releases the water in the surrounding wall 6. The timer circuit 16 controls opening / closing of the solenoid valves 13 and 14.

Next, the operation will be described. When glue is applied to boxes, etc., when work is interrupted, a work interrupt signal 17 is received by the timer circuit 16, the solenoid valve 13 is opened for a timer set time, and pressurized air is supplied from the air line 19 to the water pump 11.
To the nozzle wall 6 from the water tank 12
The inside of the nozzle is shut off from the air by supplying it to the inside. The timer circuit 16 is set so that the solenoid valve 13 shuts off the pressurized air from the air line 19 when the nozzle outlet 5 is covered with water and rises due to surface tension as shown in FIG. Next, when the gluing start signal 18 is applied to the timer circuit 16, the solenoid valve 14 is opened and the water in the surrounding wall 6 is stored in the tank 20.
And the discharge port 5 of the nozzle is ready to be glued again.

Next, a third embodiment will be described with reference to FIG.
In this embodiment, the water pump 11 and the water tank 12 of the second embodiment are replaced with a tap water line 21, and the solenoid valve 13 is a tap water line.
Turns on / off tap water from 21.

The operation is the same as in the second embodiment, except that a work interruption signal is issued.
17 is received by the timer circuit 16, the electromagnetic valve 13 is operated for a certain period of time by the signal, and a certain amount of water is supplied from the tap water line 21 into the wall 6 of the nozzle. Upon receiving the gluing start signal 18, the solenoid valve 14 is operated to discharge the water in the surrounding wall 6 to the tank 20 so that the gluing work can be restarted.

[0018]

As is apparent from the above description, according to the present invention, the nozzle is directed upward, and the surrounding wall is provided around the nozzle.
When the nozzle is not operating, the discharge port is filled with the sealing fluid so that it is blocked from the air.
It is possible to prevent clogging of the nozzle due to drying of the fluid in the nozzle. Further, by adopting the nozzle, the work of applying the fluid upward can be performed at high speed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a second exemplary embodiment.

FIG. 3 is a diagram showing a configuration of a third exemplary embodiment.

FIG. 4 is a view showing a conventional upward gluing device.

[Explanation of symbols]

1 sheet 4 glue 5 nozzle outlet 6 wall 7 introduction route 9 Electromagnetic glue injection valve 10 glue pump 11 water pump 12 water tank 13,14 Solenoid valve 15 Variable throttle valve for water 16 timer circuit 17 Work interruption signal 18 Gluing start signal 19 air line 20 tanks 21 tap water line

Claims (3)

[Claims] 1. A nozzle characterized in that a surrounding wall is provided around and at the bottom of a nozzle discharge port for discharging a fluid upward, and a sealing fluid is filled and discharged in the surrounding wall. 2. The nozzle according to claim 1, wherein an upper end of the surrounding wall has substantially the same height as an upper end of the nozzle discharge port. 3. The sealing fluid in the surrounding wall is filled with a fluid discharge stop signal and the sealing fluid in the surrounding wall is discharged according to a fluid discharge start signal. Nozzle.