JPS5822257B2 - 2 Ekitoshiyutsugan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge gun that discharges two types of liquids while mixing or reacting with each other, and more specifically, the present invention relates to a discharge gun that discharges two types of liquids while mixing or reacting with each other. The present invention relates to the structure of a new discharge gun.

2. Description of the Related Art It has been known to use a cartridge 1 formed into a double cylinder and having a shape as shown in FIG. 1 by loading it into a discharge gun having a double piston as shown in FIG.

The cartridge 1 consists of an outer cylinder 2 and an inner cylinder 3.

The outer container is filled with liquid A 6, and the inner container is filled with liquid B, which consists of an outer sealing lid 4 and an inner lid, and when the outer lid 4 and the inner lid 5 are pressed, the liquid flows through the respective outlet portions 9. and 9'.

This cartridge 1 is loaded into the discharge gun 12, the tip of the outer piston 19 of the double piston of the gun is brought into surface contact with the outer cover 4, and the tip of the inner piston 19' is brought into surface contact with the inner cover, and then high pressure gas is applied to the piston. 19, 19' removes the outer cover 4.
Then, the inner lid 5 is pushed in, liquid is forced out from the outlet of the cartridge into the tube 16, and a mixture of the two liquids is forced out of the discharge part 17 of the gun.

However, in this method, the surface of the outer piston 190 must be brought into contact with the liquid seal outer cover 4 before applying high pressure gas pressure.
High-pressure gas enters the contact surface of the piston, and a counter pressure is applied, causing the piston to retreat, and the problem often occurs that the liquid-sealing outer cover 4 and inner cover 5 move forward separately.

To prevent this, it is necessary to carefully finish the contact surfaces and to ensure sufficient contact before applying high pressure gas pressure.

There were problems such as increased production costs and complicated work.

Moreover, even if the double piston presses the liquid sealing lids 4 and 5 smoothly, there is a space 8 formed between the outer piston 19 and the inner piston 19', and as the double piston moves forward, this space 8 remains. As the spatial volume decreases and the spatial pressure increases, the pressurizing force applied by the high-pressure gas is reduced accordingly.

In other words, A due to high pressure gas increases by the amount that the space pressure increases.
The discharge amounts of liquid 6 and B liquid 7 were small, resulting in poor efficiency.

Furthermore, after the double piston presses the inner and outer liquid sealing lids 4°5 and all of the A liquid 6 and B liquid I in the cartridge are discharged, when replacing the IJ screw, the gun It is necessary to grasp the outer piston 19 that protrudes to the outside and manually retract it.

However, manual retraction was not easy due to the frictional resistance of the high pressure gas seal existing between the outer piston 19 and the support 14.

SUMMARY OF THE INVENTION An object of the present invention is to provide a discharge gun having a novel mechanism that eliminates the above-mentioned deficiencies of the prior art, allows smooth advancement and retraction of double pistons, and improves operability and efficiency.

In order to achieve the above object, the present invention has the following configuration.

That is, a two-liquid cartridge formed in a double cylinder and filled with separate liquids in the outer cylinder and inner cylinder is installed in front of the discharge nozzle, and the two liquids in the cartridge are double-layered so that the two liquids in the cartridge can be extruded at the same speed or at a fixed ratio. In a two-liquid discharge gun having a piston configured to operate the piston with high-pressure gas, a high-pressure gas seal is provided between the outer piston of the dual piston and the liquid-sealing lid that engages with the outer cylinder of the cartridge. This is a two-liquid discharge gun characterized by being equipped with a mechanism.

The present invention will be explained in more detail.

FIG. 3 shows one embodiment of a two-liquid discharge gun according to the present invention, and is a partially sectional view.

As can be seen from FIG. 3, the two-liquid discharge gun 12 has a holding cylinder 13
, a support body 14, a gun grip 15, and a tube 16 screwed onto the tip of the holding cylinder 13.

A holding cylinder 13 is rotatably connected to one end of the support body 14 by a pin 18.

The cartridge 1 is installed inside the holding cylinder.

A known gas control valve (not shown) is installed inside the support.

A high-pressure gas tube 27 is connected to one end of the cartridge 1, and the other end is open so that high-pressure gas can be introduced into the gas chamber 26 inside the cartridge 1.

Control of the valve is performed by a trigger 28. A liquid seal that guides the mixture of liquids A and B pushed out from inside the cartridge to the tube 16 without leaking to the outside is provided at the tip of the cartridge and is provided on the liquid seal contact surface 10 and the tube 16 of the gun.
The high-pressure gas seal in the gas chamber 26 is ensured by the engagement of the J-nog 20, while the high-pressure gas seal in the gas chamber 26 is secured by the joint action of the tightening screw 24, the fastening fitting 23, and the pin 22 fixed to the holding tube 13. 13, and tighten the rear end 25 of the holding cylinder 13.
The gas seal contact surface 11 of the cartridge is sandwiched between the support body 14 and the O-ring 20' provided on the support body 14 and the pistons 19, 19 as shown in FIG.
Since this is done by engaging with ', high pressure gas is completely cut off from the outside.

As shown in FIG. 3, the present invention has a structure in which a lip type seal 29 is fixed to the outer cylinder with a presser plate 30, and high pressure gas is sealed in the circumferential direction by the inner surface of the liquid sealing outer lid 4 and the seal 29. This is what I did.

Furthermore, a gas passage is provided to connect the space 8 formed between the outer piston 19 and the inner piston 19' to the outside of the gun.

The lip seal 29 is a flexible elastic body, and its outer diameter is preferably slightly thicker than the inner diameter of the seal portion of the liquid sealing outer lid.

As another embodiment of the present invention, as shown in FIG. 4, an O-ring support 32 is fixed to the outer piston with a holding plate i30, and high pressure gas sealing is performed between the liquid sealing outer cover and the tank 33. good.

Furthermore, as shown in FIG. 5, a U-shaped seal 34 made of a flexible elastic body may be embedded in the outer cylinder to provide a high-pressure gas seal with the liquid sealing outer lid 4.

2. At this time, it is clear that it is preferable that the U-shaped seal be buried closer to the inner diameter of the cartridge.

Furthermore, in the two-liquid discharge gun according to the present invention, the gas chamber 26
Since the high-pressure gas in the sealing area does not enter between the outer sealing cover 4 and the outer piston 19, the outer sealing cover 4 and the inner cover 5 for i-liquid seal move forward separately, which prevents troubles such as the double piston retreating. There have been no outbreaks.

In addition, since the space 8 is connected to the outside of the gun by the gas passage 31, even if the volume of the space 80 decreases as the double biston moves forward, the space pressure I does not increase, and therefore the pressure of the high pressure gas decreases. never be done.

Furthermore, when replacing the cartridge after the double piston presses the liquid sealing lids 4 and 5 to discharge all of the A and B liquids in the cartridge, the pressure inside the phlegm gas chamber is released. After that, the outer piston 19 is held back slightly to release the contact between the liquid sealing outer lid 4 and the lip seal 29, and the outer opening 35 of the gas passage is pressed with the fingertips, and then high pressure gas is introduced into the gas chamber. When fed, the double piston immediately retreats due to high pressure gas pressure.

This eliminates the need to manually pull out the O-ring 20 against the frictional force between the O-ring 20 and the outer piston as in the past, resulting in improved workability.

The present inventors further improved the above-described retraction method of the double piston by fixing a small cock 36 to the external opening of the gas passage and opening and closing the plug 38 with the lever 37 as shown in FIG. It was discovered that a double piston can be made to move forward and backward.

Furthermore, as shown in FIG. 7, a check valve, that is, a movable spherical valve 39 is embedded in the gas passage opening in place of the small cock.
By providing the lid 40 with a valve seat that joins the spherical valve,
It was possible to make the double-guston retreat even easier.

As described in detail above, the present invention provides two liquid discharge guns.
Since the heavy piston can be moved forward and backward reliably and easily, the conventional discharge problems and inefficiencies can be resolved and workability has been greatly improved.

Furthermore, in the present invention, the tube 16 is made by, for example, Japanese Patent Publication No. 39-437.
It is preferable to equip a known static mixer as shown in Japanese Patent Publication No. 44-8290, etc., because it improves the mixing of both liquids A and B.

This effect is particularly great when one or both of the liquids is a highly viscous liquid such as a gel-like substance.

Also, the cross-sectional shape of the piston is not limited to circular, but polygonal.

You can choose anything you like, such as a circle.

The shape may be an appropriate shape according to the shape of the cartridge.

[Brief explanation of the drawing]

FIG. 1 shows the structure of a conventionally used two-liquid cartridge, and FIG. 2 is a partially sectional view showing the structure of a conventionally used discharge gun having a double piston. FIG. 3 shows an embodiment of the two-liquid discharge gun according to the present invention, and is a partial sectional view showing the main parts thereof. Figures 4 and 5 show specific examples of the seal portion. 6 and 7 are cross-sectional views illustrating an on-off valve and a check valve used in the present invention. 1...Cartridge, 2...Outer cylinder, 3...Inner cylinder, 4...Outer lid for liquid sealing, 5...Inner lid for liquid sealing, 6...Liquid A, 7. ...Liquid B, 8...Space, 9
... A-M outlet section, 10 ... Liquid seal contact surface, 11
... Gas seal contact surface, 12... Discharge gun, 13.
... Holding tube, 14... Support body, 15... Gun grip,
16...Pipe, 17...Discharge nozzle, 18...Pin, 19.19'...Outer screw);/, 19'...Inner piston, 20,20'...0S/ Gu, 22...
Pin, 23... Tightening fitting, 24... Tightening screw, 25... Rear end of holding cylinder, 26... Gas chamber, 27.
...High pressure gas introduction/inlet tube, 28...Trigger, 2
9... Lip type seal, 30... Holding plate, 31...
・Gas passageway, 32-0 ring support, 33...0 ring ring, 34...U-shaped seal, 35...between the outside of the gas passageway, 36...small cross section, 37... lever,
38... Stopper, 39... Spherical valve, 40... Lid.

Claims (1)

[Scope of Claims] 1. A two-liquid cartridge formed into a double cylinder and having an outer cylinder and an inner cylinder filled with separate liquids is installed in front of the discharge nozzle, so that the two liquids in the cartridge can be extruded at the same speed or at a fixed ratio. nayo ni 2
In a two-liquid discharge gun that has a heavy piston and is configured to operate the piston with high-pressure gas, high-pressure gas is inserted between the outer piston of the double piston and the liquid sealing lid that engages with the outer cylinder of the cartridge. A two-liquid discharge gun characterized by being equipped with a sealing mechanism. 2. The two-liquid discharge gun according to claim 1, characterized in that a gas passage is provided in the double piston that connects the space formed between the outer piston and the inner piston of the double piston to the outside of the gun. A two-liquid discharge gun. 3. In the two-liquid discharge gun according to claim 2. A two-liquid discharge gun characterized in that an on-off valve or a check valve is provided at an external opening of a gas passage.