JPH0437645Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention relates to a compressed gas injection device, and even if a compressed gas generator such as a portable compressed gas cylinder with low pressure is used, the injection pressure will be low. The present invention relates to a compressed gas injection device that temporarily increases the pressure of compressed gas and can be used for cleaning, refilling tires, etc. with the injection pressure of compressed gas.

(Prior Art) A conventional compressed gas injection device is used by being connected to a compressor or the like with a high compression pressure through a tube, and the high-pressure gas sent from the compressor or the like is directly injected by opening and closing a valve. They were cleaning processed products that had chips on them by spraying them.

In addition, portable compressed gas cylinders filled with non-flammable compressed gas are commercially available as convenient compressed gas generators, and are used for airbrushes, etc. when creating simple paintings or illustrations. It has excellent portability.

<Problems with conventional technology> (Problems that the invention aims to solve) Examples of places in the home that are difficult to clean include the inside of aluminum sash rails and places where the nozzle of a vacuum cleaner cannot reach. The best way to clean these places is by jetting gas, and we attempted to use a compressor with a high compression pressure to clean by jetting gas.

However, this compressor with high compression pressure is very large and is rarely moved. Therefore, cleaning by jetting compressed gas can only be performed within the length of the connected pipes. Moreover, since the large compressor itself is expensive, it is not financially acceptable for individuals to purchase it, and it is not possible to easily use it at home.

Therefore, in order to enable use in any location, a conventional compressed gas injection device was connected to the portable compressed gas cylinder to perform cleaning by injection of compressed gas. However, since the pressure of this cylinder is low, there was a problem that the pressure was insufficient to blow away heavy debris, making it unusable.

<Technical Issues> Therefore, in view of the above-mentioned problems, this invention has been proposed, even if a highly portable compressed gas generator with low pressure such as the above-mentioned cylinder is used, it is difficult to clean or fill tires with air by spraying gas. This was devised with the aim of making the device itself more portable.

[Structure of the invention] (Means for solving the problem) This invention consists of a hollow injection device body, a nozzle attached to the tip of this body, and a method for appropriately discharging the compressed gas sent from the injection device body from the nozzle. The injector body is equipped with a pressurized piston that slides inside the main body and is constantly pressed toward the nozzle by the elastic force of a spring. The above-mentioned problems are solved by opening a gas injection hole to feed gas into the space between the valve and the pressurized piston.

(Function) In the compressed gas injection device of this invention, compressed gas is fed into the hollow injection device main body and the compressed gas is injected from the nozzle by appropriately opening and closing the valve. At that time, before opening the valve, compressed gas is fed into the space between the valve and the pressurized piston in the injection device main body through the gas injection hole and is stored until the pressure reaches saturation pressure. The pressurized piston is pushed and slid by the saturation pressure in a direction away from the nozzle against the elastic force of the spring, and stops at a certain position.

When the valve is opened at that point, high-pressure compressed gas is ejected from the nozzle due to the saturation pressure and the elastic force of the spring.

(Embodiments) Hereinafter, embodiments of this invention will be described with reference to the drawings.

That is, the reference numeral 1 shown in the figure is the main body of the injection device, which includes a body part 2 made of a cylindrical body with a bottom so as to have a hollow shape, and a lid-shaped nozzle attachment part 3 that is attached to the body part 2 with a screw. It is formed from.

In the nozzle mounting portion 3, a through hole 5 is formed in the center of the thick top plate 4, and a nozzle 6 is screwed into the outer opening of the through hole 5.

Further, a gas injection hole 7 for feeding compressed gas into the injection device main body 1 is bored at a suitable position on the side circumferential surface of the nozzle mounting part 3, and this gas injection hole 7 is connected to the top plate 4.
Formed so as to penetrate to the inner surface.

On the other hand, the body part 2 has a recess 8 formed on its outer bottom surface by providing a step and recessing the central part. Also, bottom 9
A through hole 10 is bored in the center, and a base end 12 of a rod-shaped valve shaft 11 is slidably passed through the through hole 10 from inside the body 2, and protrudes from the center of the recess 8 to the outside. . This base end portion 12 is made thinner by providing a step than other portions of the valve shaft 11, and a spring 13 is interposed between the step portion and the inner bottom surface of the body portion 2, and the elastic force causes the valve shaft to move. 11 is always pushed out toward the opening of the body 2.

Further, the tip 14 of the valve shaft 11 is formed with a step so as to be thin and fit into the through hole 5, and when the tip 14 is fitted into the through hole 5, the top plate 4
The stepped portion is allowed to come into contact with the inner surface of the valve, and the peripheral surface of the tip 14 and the through hole 5 are formed so as to function as a valve. Incidentally, at this time, the gas injection hole 7
is formed so as not to be blocked by the stepped portion of the tip 14 of the valve shaft 11.

At the end 15 of the proximal end 12 of the valve shaft 11 that protrudes outward from the recess 8 of the body 2, one end 1 of a gripping lever 16 is bent into a substantially L-shape.
7 is pivotally attached with a screw 18 or the like. At that time, the gripping lever 16 has one end 17 side of the L-shape attached to the lever 1.
9, and the other end is made longer as a gripping rod 20, and this gripping rod 20 is formed so as to be slightly curved to the outside of the L shape. Furthermore, the gripping lever 16 is pivotally mounted such that the gripping rod 20 is positioned along the side surface of the body 2.

At this time, the one end 17 and the end 15 are pivotally connected by making the cross section of the end 15 oblong and providing a screw hole in the end surface, so that when the end 15 is inserted into the one end 17 of the lever 19, , an oblong hole 21 large enough to have a clearance on the long diameter side is bored, and the end 1 is opened.
This is done by inserting the end 15 into the oblong hole 21 and fixing it using the screw 18 and the threaded hole in the end face of the end 15 so that the end 15 does not come out of the oblong hole 21.

When the end 15 and one end 17 of the lever 19 are pivotally connected, the tip 14 of the valve shaft 11 is inserted into the through hole 5, and the lever 19 is attached at a position where the stepped portion is in contact with the inner surface of the top plate 4. The length of the end 15 is such that it is parallel to the bottom 9 while contacting the corner of the bottom 9 or the vicinity thereof, or one end 17 is slightly inserted into the recess 8.
Overall, the length of the valve shaft 11 is set.

Then, when the body part 2 and the gripping lever 16 are grasped with a hand or the like, the lever 19 pulls the end 15 in the direction of further protruding against the elastic force of the spring 13. Tsuparu. As a result, the tip 14 of the valve shaft 11 is pulled out from the through hole 5, and the valve is in an open state. And the torso 2
When the grip lever 16 is released from the grip, the spring 13 returns the valve to its original state and the valve is closed.

On the other hand, a pressurized piston 23 that is constantly pressed toward the nozzle attachment part 3 by a spring 22 and slides inside the body 2 is disposed inside the body 2 . This pressurized piston 23 is connected to the valve shaft 1
1, and is formed to slide around the valve shaft 11.

Also, between the through hole 5 and the nozzle 6, between the circumferential surface of the top plate 4 and the through hole 5, between the outer circumferential surface of the pressurized piston 23 and the inner circumferential surface of the body 2, and between the pressurized piston Between the inner circumferential surface of the valve shaft 11 and the outer circumferential surface of the valve shaft 11, a packing 2 made of an O-ring or the like is provided.
4 is arranged to maintain airtightness.

A compressed gas generator 2 such as a compressed gas storage device or a generator is attached to the injection device thus formed, with the nozzle attachment portion 3 attached to the body portion 2 and hermetically sealed.
8. For example, compressed gas is fed from a portable simple compressed gas cylinder through the tube 25 and the pipe connection fitting 26.

At this time, if the tip 14 of the valve shaft 11 is inserted into the through hole 5 and the stepped portion is in contact with the inner surface of the top plate 4, that is, the valve is closed, the top plate 4 and Compressed gas is injected into the space between the pressurizing piston 23, that is, between the tip 14 of the valve shaft 11, which serves as a valve, and the pressurizing piston 23. When it is injected, the pressurized piston 23 is pushed by the pressure of the compressed gas from the portable simple compressed gas cylinder, and the space between the top plate 4 and the pressurized piston 23 is expanded. Then, the pressurizing piston 23 stops at a position where the saturation pressure of the compressed gas in the portable simple compressed gas cylinder and the elastic force of the spring 22 that presses the pressurizing piston 23 are balanced.

When the valve shaft 11 is pulled by gripping the gripping lever 16 with a hand or the like at the time of stopping, the tip 14 of the valve shaft 11 comes out of the through hole 5 and the valve is opened.

In this state, the compressed gas between the top plate 4 and the pressurized piston 23 is injected from the nozzle 6, and the atmospheric pressure therebetween becomes lower than the saturation pressure and becomes the same as atmospheric pressure. When the pressure in the space between the top plate 4 and the pressurized piston 23 becomes low, the spring 22 that presses the pressurized piston 23 works, and the pressurized piston 23
moves vigorously towards the top plate 4.

As a result, the compressed gas ejected from the nozzle 6 is
Due to the pressure of the compressed gas itself and the pressure exerted by the spring 22, the pressure becomes temporarily high and is discharged. As a result, even if the pressure inside the portable compressed gas cylinder is not very high, the pressure of the compressed gas injected from the nozzle 6 becomes large, making it ideal for tasks such as cleaning and filling tires with air by injecting gas as described above. becomes.

Furthermore, as shown in FIG. 4, if a branch fitting 27 is attached to the tip of the nozzle 6, the compressed gas can be sent vigorously not only to one location but also to other directions at the same time.

In addition, the injection device main body 1, the valve shaft 1
1. The shape of the gripping lever 16, etc. is not limited to the shape described above, and the sealed portion by the packing 24 may be set appropriately to accommodate structural changes, and is not limited as described above. Needless to say. Furthermore, it goes without saying that the compressed gas generator 28 is not limited to a portable simple compressed gas cylinder, and may be of any type.

[Effects of the invention] This invention configured as described above includes a hollow injection device main body 1, a nozzle 6 attached to the tip of this main body 1, and a compressed gas sent into the injection device main body 1 from the nozzle 6 as appropriate. Since it consists of a valve that opens and closes to inject, the compressed gas can be injected from the nozzle 6 by opening the valve, and the injection can be stopped by closing the valve.

The injection device body 1 is equipped with a pressurized piston 23 that slides inside the body 1 and is constantly pressed toward the nozzle 6 by the elastic force of a spring 22. By opening the gas injection hole 7 to feed the gas into the space between the compressed gas generator 28 and the pressurized piston 23.
When the valve is closed, the compressed gas sent from the pressurized piston 23 fills the space between the nozzle 6 and the pressurized piston 23, and the saturated pressure of the compressed gas generator 28 and the elasticity of the spring 22 that presses the pressurized piston 23 are generated. The pressurized piston 23 is pushed back to a position where the repelling force is balanced. Thereafter, when the valve is opened, the spring 22 is released and the pressurized piston 23 moves vigorously in the direction of the nozzle 6. As a result, the pressure of the compressed gas and the elastic force of the spring 22 become a pressure that is added to the gas ejected from the nozzle 6, and the pressure becomes high only for a temporary period when the pressurized piston 23 moves, and the nozzle Gas will be ejected from 6.

Therefore, even if the pressure of the compressed gas generator 28 is low, it is possible to easily perform cleaning by jetting gas or filling air into tires or the like. Furthermore, in actual use, intermittent injection is desirable, and by doing so, the injection pressure is high, making the work more efficient, and since the work can be done only with intermittent injection, it also leads to savings in compressed gas.

Moreover, since the structure is simple and only the pressurized piston 23 is provided inside the injection device main body 1, it can be made very compact and has excellent portability.For example, if a portable simple compressed gas cylinder is used, it can be It can be used in places like The places where it is used are also
It can be used to remove water droplets from car door mirrors and fender mirrors, clean dash boards, replenish air in tires, process chips and garbage from mechanical work in factories, and even as an auxiliary tool for business trips and at home. It can be used to dispose of garbage in places where the nozzle of a vacuum cleaner cannot reach, such as the corners of satsushi, replenishing the air of motorcycles and bicycles, disinfecting home gardens and flower beds, etc. It can also be used to dispose of dust on office desks, etc. It is wide-ranging.

As explained above, according to this invention, even if the compressed gas generator has a low pressure, it can temporarily inject high pressure compressed gas with a very simple structure, and is portable. This makes it suitable for cleaning all kinds of places by means of gas injection, saves compressed gas, and can be provided at a low price, which is a practical advantage.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is an exploded perspective view, Fig. 2 is a front sectional view, Fig. 3 is a perspective view of the nozzle in use, and Fig. 4 is a perspective view of another embodiment of the nozzle. It is. DESCRIPTION OF SYMBOLS 1... Injection device main body, 2... Body part, 3... Nozzle attachment part, 4... Top plate, 5... Through hole, 6... Nozzle, 7... Gas injection hole, 8... Recess, 9...
Bottom, 10... Through hole, 11... Valve shaft,
12... Base end portion, 13... Spring, 14...
Tip, 15...End, 16...Grip lever, 17...
...One end, 18...screw, 19...brake, 20...
Grip, 21...Oval hole, 22...Spring,
23... Pressurized piston, 24... Packing, 2
5...Tube, 26...Pipe connection fitting, 27
... Branch fitting, 28 ... Compressed gas generator.

Claims (1)

[Scope of utility model registration request] It consists of a hollow injection device body, a nozzle attached to the tip of this body, and a valve that opens and closes to appropriately inject the compressed gas sent into the injection device body from the nozzle. A pressurized piston that slides on the valve and is constantly pressed toward the nozzle by the elastic force of a spring is arranged, and a gas injection hole is opened to send compressed gas into the space between the valve and the pressurized piston. A compressed gas injection device characterized by a perforation.