JPH0716957Y2 - Grease gun for cartridge grease and gun adapter used for it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a grease gun for cartridge grease and a gun adapter used therefor. For more details,
For example, construction equipment such as bulldozers, excavators, asphalt plants, trucks, tank trucks,
The present invention relates to a grease gun for a cartridge grease for replenishing grease to lubricated parts of automobiles such as buses, machine tools such as lathes and grinders, working machines such as cranes, and steel machines, and a gun adapter used therefor.

[Prior Art] Conventionally, when replenishing grease to many machine operating parts such as various construction machines, automobiles, machine tools, steel manufacturing facilities, and transportation machines, grease is greased by a grease gun. Of these grease guns, a type in which grease is put in a bellows type tube and a mouth portion of the tube is screwed into a grease supply port of the grease gun (a grease gun for cartridge grease) is often used recently.

FIG. 6 shows the structure of a grease gun for cartridge grease currently used (hereinafter, simply referred to as a grease gun).

In FIG. 6, reference numeral (30) is a housing cylinder for housing the cartridge tube (31) filled with grease. The housing cylinder (30) is a cylindrical member whose one end is open, and a threaded portion is formed on the outer circumference of the open end. A coil spring (33) to which a push plate (32) is connected is provided at the bottom of the housing cylinder (30). When accommodating a new cartridge tube (31), the coil spring (33) is pulled by the chain (34), the push plate (32) is fixed to the bottom wall (35) of the accommodating tube (30), and then the cartridge tube (31). (3
1) is accommodated. When using a grease gun, remove the chain (34) fixing and remove the coil spring (3
The urging force of 3) pushes the cartridge tube (31) to supply grease. In this case, since the biasing force of the coil spring (33) is large, the storage cylinder (30)
Is required to have a considerable strength, and is generally made of metal such as iron or stainless steel. In addition, (39)
Is a handle for actuating the plunger (38).

[Problems to be solved by the invention] However, since the conventional grease gun employs a mechanism for pressing the cartridge tube with the biasing force of the spring, the metal housing cylinder (30), the pushing plate (32), the coil spring (33) and the chain (34) are necessary (these total weights occupy about half of the total grease gun), and the weight of the grease gun becomes large, which is inconvenient to handle.

For this reason, the push plate (32),
It is conceivable to reduce the weight by removing the coil spring (33) and the chain (34) and changing the material of the housing cylinder (1) from metal to synthetic resin. However, in this case, air leaks from the gap between the mouth portion (36) of the tube (31) and the grease supply port (37), and the plunger (38).
The negative pressure due to the operation of cannot absorb the grease in the tube (31), and it cannot be used as a grease gun.

In view of the above circumstances, an object of the present invention is to provide a grease gun which is much lighter in weight than conventional grease guns, is easy to handle, and has a simple structure, and a gun adapter used therefor. .

[Means for Solving the Problems] A grease gun of the present invention comprises: (a) a substantially cylindrical storage cylinder having an open end for storing a cartridge tube filled with grease; and (b) a handle. A plunger connected to the handle, a pump cylinder part on which the plunger slides, a grease supply port formed at substantially the center of the pump cylinder and connected to the mouth part of the cartridge tube,
It consists of a grease outlet formed at one end of the pump cylinder part, and a gun cylinder that moves the grease by creating a negative pressure in the pump cylinder part by operating the handle up and down, and at the grease supply port of the gun cylinder,
It is characterized in that a seal pipe is provided which extends into the mouth portion of the cartridge tube and whose outer peripheral surface is close to the inner surface of the mouth portion of the cartridge tube. Further, the gun adapter of the present invention is provided at the grease supply port of the grease gun that supplies grease in the cartridge tube by operating the handle vertically, and has an outer diameter slightly smaller than the inner diameter of the mouth of the cartridge tube. It is characterized in that the outer peripheral surface is formed of a tube body that is close to the inner surface of the mouth of the cartridge tube.

[Operation] In the grease gun of the present invention, a seal pipe extending inside the mouth of the cartridge tube is provided, and grease enters between the inner surface of the mouth and the outer surface of the seal pipe to prevent air leakage. The grease in the tube can be surely sucked by the operation of the plunger.

[Embodiment] Hereinafter, a grease gun of the present invention and a gun adapter used therefor will be described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a grease gun according to an embodiment of the present invention.

In FIG. 1, (1) is a container for accommodating a bellows type cartridge tube (2) filled with grease. The accommodating cylinder (1) has a substantially cylindrical shape with one end open, and is made of polyethylene, polypropylene, acrylic resin, AB.
It is made of synthetic resin such as S resin, nylon, polystyrene, polybutylene terephthalate, polyethylene terephthalate, polyacetal, polytetrafluoroethylene, polyphenylene sulfide, steel pipe, stainless steel pipe, aluminum pipe, and reinforced paper. In the grease gun of the present invention, unlike the conventional grease gun, it is not necessary to push the cartridge tube with the coil spring, and therefore the pushing plate and the chain are also unnecessary, so that the housing cylinder (1) is not required to have high strength. Therefore, even if it is made of synthetic resin, various kinds of metal, and reinforced paper, it can be used sufficiently and the weight of the grease gun as a whole can be reduced to about half. If all or part of the container (1) is made of transparent synthetic resin, the amount of grease in the tube (2) in the container (1) can be seen at a glance, which is very convenient for work.

(3) is a gun cylinder that moves grease by operating the handle up and down. The gun cylinder has a handle (4) made of a bar or strip and a plunger (5) connected to the handle (4).
The plunger (5) moves the handle (4) up and down (first
(In the figure) is a member that slides the pump cylinder portion (6). In the vicinity of the center of the pump cylinder part (6), the mouth part (7) of the above-mentioned cartridge tube (2).
Is formed with a grease supply port (8).
The grease supply port (8) is in the shape of a short cylinder, and a screw part (9) is formed on the inner peripheral surface thereof.

A grease outlet (11) having a check valve (10) is formed at the end of the pump cylinder part (6). Reference numeral (16) is a connector having an internal thread on its inner surface, and a gun nozzle (not shown) having a connector having a threaded portion is connected to this connector (16).

The feature of the present invention resides in that the grease supply port (8) is provided with a seal pipe (12) such that the outer peripheral surface thereof is close to the inner surface of the mouth portion (7) of the cartridge tube (2). 2 is an enlarged view of the vicinity of the grease supply port (8) in FIG.
Shown in the figure.

The seal pipe (12) is a cylindrical member, and may be made of any material having oil resistance and a certain degree of rigidity, such as iron, aluminum, copper, zinc,
It can be made of a metal such as stainless steel or an alloy thereof, or a synthetic resin such as polyethylene, polypropylene or nylon.

The seal pipe (12) has a length such that at least a part thereof is inserted into the mouth (7) of the tube (2) when the cartridge tube (2) is connected to the grease supply port (8). ing. The longer the length of the seal pipe (12) is, the less air is sucked in. However, from the viewpoint of workability in mounting the cartridge tube (2), the length of the external thread of the mouth portion (7) of the cartridge tube (2). It is better to be shorter than (l) (see FIG. 2). In consideration of these points, the length of the seal pipe (12) is 120 to 20% of the length (l) of the outer thread of the mouth portion (7) of the cartridge tube (2), particularly 110 to
It is preferably 40%.

The seal pipe (12) may be integrally formed with the grease supply port (8) as shown in FIG. 2, or may be separately manufactured as a gun adapter as shown in FIG.
A female screw may be cut on the inner circumference of the grease supply port (8), and the grease supply port (8) may be attached by screwing with a male screw formed on the outer circumference of the seal pipe (12). Furthermore, they may be attached by adhesion or welding (see FIG. 5). When the seal pipe (12) is made of synthetic resin, the grease supply port (8) is provided with a stop groove (13), and the stop groove (13) is fitted and fixed. (See Fig. 4).

In the embodiment shown in FIG. 5, a taper portion (14) is formed on the outer peripheral surface of the base end portion of the seal pipe (12). If the taper part (14) is formed, the cartridge tube (2)
When the screw is screwed in, the inner tip of the mouth portion (7) is brought into close contact with the taper portion (14) to further improve the sealing performance. The taper angle (α) is not particularly limited in the present invention, but a guideline is approximately 45 ° or less.

The thickness (t) of the seal pipe (12) is the strength of the material used, the length of the seal pipe (12), the clearance between the outer surface of the seal pipe (12) and the inner surface of the mouth portion (7) (cartridge tube (2)). Considering the tolerance of the mouth (7) size of 0.
It is preferable to secure about 2 mm), but it is about 0.2 to 2.5 mm as a guide.

Next, a method of using the grease gun having the above configuration will be described.

First, the cap of the mouth part (7) of the cartridge tube (2) filled with grease is removed, and the mouth part (7) is removed.
To the grease supply port (8). Then, the accommodating cylinder (1) is connected to the gun cylinder (3) while accommodating the cartridge tube (2). Although this connection may be performed by screwing as in the conventional product, since the weight of the housing cylinder (1) can be reduced in the present invention, various one-touch mechanisms may be used instead of screwing. It is possible.

With the above operation, the greasing is possible. To lubricate, move the handle (4) up and down while pressing the grease inlet (not shown) at the tip of the gun nozzle connected to the connector (16) against the grease nipple of the machine to be lubricated. Good. That is, when the tip end (15) of the handle (4) is separated from the storage cylinder (1), the plunger (5) separates from the grease outlet (11) and reaches the grease supply port (8). In this state, the inside of the pump cylinder portion (6) becomes negative pressure, and the grease enters the pump cylinder portion (6) from the cartridge tube (2). In this case, since grease has entered the gap between the inner surface of the mouth portion (7) and the outer surface of the seal pipe (12), air will not enter into the grease to be replenished, so that the grease suction Is done.

Next, when the handle (4) is brought closer to the storage cylinder (1), the grease in the pump cylinder (6) is fed to the machine through the grease outlet (11), the connector (16) and the greasing port. It

[Advantages of the Invention] As described above, in the grease gun of the present invention, the grease supply port is provided with the seal pipe, and air is prevented from being sucked from the grease supply port when the handle is operated. For this reason, the push plate, coil spring, and chain members that were equipped in conventional grease guns can be omitted, and the coil spring and chain accommodating parts are not required, and the accommodating cylinder can be shortened. However, since it is possible to use a thin one, it is possible to shorten the containing cylinder. Further, since the strength of the containing cylinder is small, it is possible to reduce the weight by using a synthetic resin or the like. As a result, the weight of the grease gun as a whole can be reduced to about half, which is very easy to handle. Furthermore, if at least a part of the container is made of transparent synthetic resin, the degree of grease reduction can be seen at a glance from the outside, which is very convenient for handling.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a grease gun according to an embodiment of the present invention, FIG. 2 is an enlarged view near the grease supply port of the grease gun shown in FIG. 1, and FIGS. FIG. 6 is an enlarged explanatory view showing another embodiment of the seal pipe in the gun, and FIG. 6 is a schematic explanatory view of a conventional grease gun. (Main symbols in the drawing) (1): Storage tube (2): Cartridge tube (3): Gun cylinder (4): Handle (5): Plunger (6): Pump cylinder section (7): Mouth section (8) ): Grease supply port (11): Grease outlet (12): Seal pipe (14): Tapered part

Claims (6)

[Scope of utility model registration request] Claims: (a) a substantially cylindrical accommodating cylinder having one end opened for accommodating a cartridge tube filled with grease; (b) a handle; a plunger connected to the handle; and the plan. It consists of a pump cylinder part on which the jar slides, a grease supply port formed in the approximate center of the pump cylinder part and connected to the mouth part of the cartridge tube, and a grease outlet formed at one end of the pump cylinder part. , A gun cylinder that moves the grease by creating a negative pressure in the pump cylinder part by operating the handle up and down, and at the grease supply port of the gun cylinder,
A grease gun for cartridge grease, characterized in that a seal pipe is provided which extends into the mouth of the cartridge tube and whose outer peripheral surface is close to the inner surface of the mouth of the cartridge tube. 2. The grease gun according to claim 1, wherein a taper portion is formed on the outer peripheral surface of the base end portion of the seal pipe. 3. The grease gun according to claim 1, wherein the seal pipe is formed integrally with the grease supply port. 4. The grease gun according to claim 1 or 2, wherein the seal pipe is manufactured separately from the grease supply port and is fixed to the grease supply port. 5. An outer diameter which is provided at a grease supply port of a grease gun for supplying grease in the cartridge tube by operating the handle up and down and has an outer diameter slightly smaller than the inner diameter of the mouth of the cartridge tube, and whose outer peripheral surface is the cartridge. A gun adaptor, which is composed of a tube body close to the inner surface of the mouth of the tube. 6. The gun adapter according to claim 5, wherein a taper portion is formed on the outer peripheral surface at one end.