JP2554587B2 - Tube type push type one hand liquid injection gun - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube type push type one hand liquid injection gun, and more particularly to a tube type push type one hand grease gun to which a bellows type grease cartridge is attached.

[0002]

2. Description of the Related Art Push-type liquid injection guns capable of supplying chemical liquids such as insecticides and lubricating oils such as grease under pressure are used in various fields.

FIG. 2 is a typical example of a push type grease gun in which grease is manually filled.

In the figure, a grease gun 30 is schematically shown as an outer cylinder 32, a cap 34 removably fixed to the bottom of the outer cylinder 32, and an inner portion of the outer cylinder 32 penetrating through a central portion of the cap 34. A rod 36 having a plunger 36a at the end extending to the inside of the outer cylinder 32 and a handle 36b on the side opposite to the plunger 36a;
Which has a bowl-shaped packing 38 attached to the outer cylinder 32, a coil spring 40 which presses the bowl-shaped packing 38 toward the plunger 36a of the rod 36, and a cylinder chamber 42a which reciprocally receives the plunger 36a.
4, a cylinder member 42 fixed to the side opposite to 4, a lubrication mouthpiece 44 fixed to the tip of the cylinder member 42, and a lubrication mouthpiece 44 and a cylinder chamber 42 of the cylinder member 42.
and a check valve 46 which is interposer between the a.

A method of using the grease gun 30 will be described. First, the grease gun 30 is turned upside down and the cap 34 is removed from the outer cylinder 32. Next, grease the outer cylinder 3
2 is filled and the cap 34 is attached.

Next, the lubricating base 44 is pressed against the grease nipple into which grease is to be injected, and the handle 36b is pushed with the other hand while holding the outer cylinder 32 with the one hand and the rod 3
Place 6 in cap 34. This allows the rod 36
Of the cylinder 36 of the cylinder member 42
2a, and the grease in the cylinder chamber 42a is pushed out through the check valve 46 to be supplied to the oil supply base 44.

[0007]

The hand-filled push type grease gun requires a smaller space for performing an injection operation than the lever type grease gun, and is therefore widely used in a small work space.

However, in the conventional push-type grease gun 30 described above, the cylinder member 4 is held by holding the outer cylinder 32 with one hand and pushing the handle 36b with the other hand.
The structure that pushes out the grease in the second cylinder chamber 42a is adopted. Therefore, this push type grease gun 30
Has the drawback that it cannot be used in applications where it cannot be held with both hands.

Further, since the conventional push type grease gun 30 described above is filled with grease by hand filling, it has a drawback that the hands and the surroundings are contaminated with grease during filling work, and the grease with low viscosity is used. Highly toxic drugs,
There is also a drawback that it cannot be used for liquids that are not exposed to air.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a tube type push type one hand liquid injection gun which can be operated by one hand. To do.

The tube-type push-type one-hand liquid injection gun of the present invention includes a tube connection port to which a bellows-shaped tube filled with a liquid can be attached in a replaceable manner .
And a main body that is fluidly connected to the tube connection port and has a plunger chamber that is closed to the outside for accommodating the plunger; a plunger that is mounted in the plunger chamber of the main body; And a cylinder chamber that receives the plunger reciprocally and near the lower end of the cylinder
When the cylinder cylinder is in the extended position, the cylinder
It is possible to fluidly connect the chamber and the plunger chamber.
A cylinder cylinder having a small hole; spring means capable of pressing the cylinder cylinder to an extended position where the cylinder chamber and the plunger chamber are fluidly connected to each other through the small hole; a nozzle fixed to the tip of the cylinder cylinder; The check valve is inserted between the cylinder chamber and the nozzle.

In a preferred embodiment of the present invention, an outer cylinder for accommodating the tube is fixedly provided on the main body.

[0013]

The tube-type push-type one-hand liquid injection gun of the present invention holds the main body with one hand and presses the nozzle against the inlet, such as a grease nipple, into which the liquid is to be injected. In this state, force is applied to move the main body toward the entrance. As a result, the cylinder tube relatively moves toward the back of the plunger chamber of the main body, and at the same time, the plunger moves in a direction to relatively reduce the volume in the cylinder chamber. After the plunger passes through the small hole, the cylinder chamber is sealed except for the check valve leading to the nozzle. Therefore, when the plunger enters the cylinder chamber, the liquid therein is pushed out to the nozzle through the check valve.

When the operator removes the force of his / her hand, the cylinder tube is extended by the spring means, that is, in the cylinder chamber.
Move in the direction of increasing the product to increase the negative pressure in the cylinder chamber
I do. Plunger is formed near the lower end of the cylinder tube
After passing through the small hole, with the large negative pressure accumulated so far
Liquid is sucked up from the tube and the tube is bellows-shaped
Compress and compress along the folds.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A tube type push type one hand liquid injection gun according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a vertical sectional view of an embodiment of a grease cartridge type push type one hand grease gun according to the present invention.

The push-type one-hand grease gun 10 shown in FIG. 1 schematically includes a main body 12, an outer cylinder 14, and
It is composed of a lid body 16, a plunger 18, a cylinder tube 20, a coil spring 22, a sealing member 24, a check valve 26, and a nozzle 28. Reference numeral 8 is a bellows type grease cartridge filled with grease, which is generally a disposable type. JIS9808
The products defined in 1) are sold as "Micro Multi Grease 80 g" and "Micro Multi Grease 400 g" by the applicant of the present invention, Japan Grease Nipple Co., Ltd., for example.

A grease cartridge connection port 12a for mounting the grease cartridge 8 in a replaceable manner is provided at the lower part of the main body 12, and a female screw for screwing with a male screw formed at the mouth of the grease cartridge 8 is provided inside thereof. Are formed. At the top of the body 12, the plunger 1
A cylindrical plunger chamber 12b for housing 8 is formed. An oil passage 1 for fluidly connecting the grease cartridge connection port 12a and the plunger chamber 12b is provided.
2c is formed. Plunger chamber 12b and oil passage 1
A step portion 12d is formed at the boundary with 2c, and the washer 13 fixed near the lower end of the plunger 18 is supported by abutting on the step portion 12d.

The cylindrical outer cylinder 14 has its upper end narrowed by a diaphragm, and its bottom is closed by a detachably attached lid 16.

Although the grease cartridge 8 is protected by the cylindrical outer cylinder 14 in the preferred embodiment shown, it is large enough that the main body 12 itself can be firmly gripped with one hand and the grease cartridge is damaged. If it is made of a material that is unlikely to occur, the outer cylinder 1
4 can also be omitted.

The plunger 18 is a cylindrical member and is mounted in the plunger chamber 12b of the main body 12. The upper portion of the plunger 18 has a cylinder chamber 20a of the cylinder cylinder 20.
It is stored inside so that it can reciprocate.

A coil spring 22 is provided between the cylinder barrel 20 and the washer 13 of the plunger 18.
The coil spring 22 can press the cylinder barrel 20 to the extended position.

A small hole 20 is provided near the lower end of the cylinder cylinder 20.
b is formed. The small hole 20b is formed in the cylinder tube 2
When 0 is in the extended position, the cylinder chamber 20a and the plunger chamber 12b are fluidly connected.

The outer peripheral surface of the cylinder cylinder 20 and the plunger chamber 1
A sealing member 24 is mounted between the inner peripheral surface of the main body 12 defining the vicinity of the upper end of 2b and thereby the plunger chamber 12b is sealed from the outside.

A check valve 26 is installed adjacent to the cylinder chamber 20a of the cylinder cylinder 20. This check valve 26
The ball 26a and the ball 26a in the cylinder chamber 20
The coil spring 26c is configured to press against the orifice 26b communicating with a.

A nozzle 28 is fixed to the tip of the cylinder barrel 20. In the illustrated preferred embodiment, the tip of the nozzle 28 enters the inside of the cylinder cylinder 20, but the tip of the nozzle 28 is shown.
It is also possible to attach the one that projects beyond the end face of the.

Next, a method of using the grease gun 10 shown in FIG. 1 and its operating principle will be described.

In use, the mouth of the grease cartridge 8 filled with grease is screwed into the grease cartridge connection port 12a and fixed.

In the unused state, the coil spring 22 pushes up the cylinder barrel 20 to the extended position. At this extended position, the cylinder chamber 20a is fluidly connected to the plunger chamber 12b via the small hole 20b, and thus to the grease cartridge 8 via the oil passage 12c.

When the nozzle 28 of the grease gun 10 is pressed against the grease nipple into which grease is to be injected and the operator grips and pushes up the outer cylinder 14, the outer cylinder 14, the main body 12 and the plunger 18 are lifted. As a result, the cylinder cylinder 20 moves down relative to the outer cylinder 14, the main body 12, and the plunger 18. The plunger 18 relatively moves up in the cylinder chamber 20a of the cylinder cylinder 20, that is, moves in a direction of decreasing the volume of the cylinder chamber 20a. After the plunger 18 has passed the position of the small hole 20b, the cylinder chamber 20a is closed by the orifice 26 of the check valve 26.
It is sealed except for c. Therefore, when the operator further lifts the outer cylinder 14, the ball 26a overcomes the pressure of the coil spring 26c and is hydraulically lifted. As a result, the grease in the cylinder chamber 20a is supplied to the nozzle 28 through the check valve 26.

When the operator removes the force of his / her hand, the outer cylinder 14, the main body 12 and the plunger 18 are pushed down by the coil spring 22. As a result, the plunger 18 moves relatively downward in the cylinder chamber 20a of the cylinder cylinder 20, that is, moves in a direction of increasing the volume of the cylinder chamber 20a, and increases the negative pressure in the cylinder chamber 20a. Small hole 20b formed by the plunger 18 near the lower end of the cylinder cylinder 20
When passing the position of, the large negative pressure accumulated up to that point
The grease is replenished from the grease cartridge 8 through the plunger chamber 12b and the oil passage 12c to replenish the cylinder chamber 20.
Fill the inside of a with grease.

[0032]

According to the tube type push type one hand liquid injection gun of the present invention, the cylinder cylinder is mounted so as to be able to move in and out of the plunger chamber of the main body, and the cylinder cylinder can be pushed to the extended position by the spring means. Therefore, when the operator fixes the main body or the outer cylinder with one hand, the operator can lift the outer cylinder to apply the pressure to supply the liquid from the nozzle. In other words, grease can be supplied only by reciprocating motion with one hand,
There is an effect that liquid can be supplied by applying pressure even in a narrow space.

Since the tube is filled with the liquid and such a tube is detachably attached, there is no drawback that the hands and the surroundings are contaminated with the liquid during the filling work, and the low viscosity liquid and the toxicity It has become possible to use it for strong chemicals and liquids where it is not desirable to touch the air.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of a grease cartridge type push-type one-hand grease gun according to the present invention.

FIG. 2 is a vertical sectional view of a typical example of a push-type grease gun in which grease is manually filled.

[Explanation of symbols]

 8 Grease Cartridge 10 Grease Gun 12 Main Body 12a Grease Cartridge Connection Port 12b Plunger Chamber 14 Outer Cylinder 18 Plunger 20 Cylinder Cylinder 20a Cylinder Chamber 20b Small Hole 22 Coil Spring 24 Sealing Member 26 Check Valve 28 Nozzle

Claims (2)

(57) [Claims] 1. A tube connection port to which a bellows-shaped tube filled with a liquid can be attached in a replaceable manner , and a fluid connection to the tube connection port, which is sealed to the outside for housing a plunger. plunger plunger mounted in a room at the main body; body having a plunger chamber a cylinder barrel that is out can mounted to the plunger chamber of the body, and the cylinder chamber receiving the plunger for reciprocal movement, and, of the cylinder barrel Formed near the bottom edge
When the cylinder tube is in the extended position,
With a small hole that can be fluidly connected to the Langer chamber
Cylinder tube having ; spring means capable of pressing the cylinder tube to an extended position where the cylinder chamber and the plunger chamber are fluidly connected via a small hole; a nozzle fixed to the tip of the cylinder tube; and a cylinder chamber A tube type push-type one-hand liquid injection gun configured by including a check valve interposed between the nozzle and the nozzle. 2. The tube type push type one-hand liquid injection gun according to claim 1, further comprising an outer cylinder fixed to the main body for accommodating the tube. Injection gun.