JPH0219678Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a grease hose used in a grease gun for applying grease to various transportation machines and industrial machines.

[Prior Art] Today, an injector called a grease gun is often used to inject grease into construction machinery and other various mechanical devices.

At the tip of this injector 10 is a grease nozzle 15.
A metal pipe 12 called
As shown in FIG. 3, the grease nozzle 15 is provided with a coupler 16 at the tip of a metal pipe 12 that fits into a grease nipple 33 provided at a grease inlet 31 of a mechanical device. A base metal fitting 18 having a male screw portion 19 that is screwed to the injector 10 via a packing 13 or the like is provided at the base of the injector 12 .

This grease nozzle 15 is installed by gripping the injector 10 and chucking the coupler 16 to the grease nipple 33 of the grease injection port 31.
Grease can be easily injected even when the grease inlet is located somewhat inward from the outer surface of the mechanical device.

Moreover, instead of this grease nozzle 15, what is called a grease hose may be used.

This grease hose has a coupler 16 at the tip of a pressure-resistant rubber tube or the like instead of the metal pipe 12, and a base metal fitting 18 having a male thread 19 at the base. The grease nipple 33 of the inlet 31 is located at the back of the mechanical device.
For example, even when it is provided at a corner, it is possible to easily apply grease.

[Problems to be solved by the invention] The above-mentioned grease nozzle has rigidity, and since the injector can be grasped and the coupler can be positioned at the grease nipple of the grease injection port, it is possible to position the coupler at the grease nipple position without placing the hand in the grease nipple position. Even if insertion is not possible, the coupler can be chucked to the grease nipple to enable grease up. but,
Depending on the orientation of the grease nipple, the position and direction in which the injector is fixed by hand is specified, which has the disadvantage that the position of the injector is restricted, and sometimes it is not possible to chuck the coupler to the grease nipple.

On the other hand, since the grease hose is bendable, if the injector is located near the grease nipple, the coupler can be chucked to the grease nipple regardless of the orientation of the injector, but it is always possible to keep your hands away from the grease. Since the coupler must be inserted up to the nipple position and chucked to the grease nipple, it is time-consuming.

When applying grease to large equipment such as construction machinery and equipment that has many grease inlets, we will determine the location of the grease nipple where it is appropriate to use a grease nozzle and the location of the grease hose. In many cases, there is a mixture of suitable grease nipple locations (e.g. corners, ground planes, bends, etc.), and an injector with a grease nozzle and an injector with a grease hose are required. The situation was ripe.

Furthermore, although there are cases where a single injector is used and the grease nozzle and grease hose are replaced, there is a drawback that this replacement is time-consuming.Furthermore, today, high-pressure grease injection requires ^a Since high-pressure injection is carried out, if the grease nozzle or grease hose is not firmly fixed to the injector, grease will leak from the attachment part between the injector and the grease nozzle or grease hose. Even though they were connected by screws, they were not easy to replace.

[Means for solving the problem] The present invention provides a grease hose for a grease gun having a coupler at the tip for chucking a grease nipple, the base side of the grease hose having:
covered with a rigid pipe such as a metal pipe having a length of at least 1/2 of the total length of the grease hose,
A flexible pipe such as a rubber pipe is exposed on the tip side, and an outer pipe having a rigidity long enough to cover the exposed flexible pipe portion is attached to the rigid pipe such as the metal pipe. The outer tube is provided so as to be slidable against the coupler, and the tip of the outer tube can be locked and fixed to the coupler.

[Operation] Since the grease hose according to the present invention has a rigid pipe and covers at least 1/2 of the base side of the flexible pipe, the rigid pipe part and the flexible pipe part are separated. With the flexible pipe part, it is possible to change the orientation of the coupler while keeping the orientation of the injector fixed, and the outer pipe can be slid onto the tip of the grease hose, By locking and fixing the tip of the outer pipe to the coupler and covering the flexible part with the outer pipe, the outer pipe and the rigid pipe part give rigidity to the entire grease hose, and the coupler is always connected. It can also be fixed in a fixed direction relative to the injector.

〔Example〕

The embodiment of the grease hose according to the present invention is the first embodiment of the grease hose according to the present invention.
The coupler 16 is connected to the rubber tube 2 as shown in FIG.
1, and on the base side of the rubber tube 21, at least 1/2 or more of the total length of the rubber tube 21 is covered with a metal pipe 25, and the outer periphery of the portion not covered by the metal pipe 25 is provided at the tip of the rubber tube 21. A spiral metal wire 22 is wound around the tube to form a rubber tube 21 having high pressure resistance and flexibility. The outer diameter of the metal pipe 25 is approximately the same as or slightly larger than the outer diameter of the spiral metal wire 22 wound around the rubber tube 21.

A base metal fitting 18 is provided at the base of the grease hose 20, and the base metal fitting 18 has a through hole inside and a male screw portion 19 on the outer periphery. The fact that it can be screwed and fixed to the gun is the same as in the past.

Further, the grease hose 20 is further provided with a metal outer pipe 27, and the outer pipe 27 is slidable relative to the metal pipe 25 by making its inner diameter approximately match the outer diameter of the metal pipe 25. The length of this outer tube 27 is longer than the length of the portion of the rubber tube 21 that is not covered by the metal pipe 25, and a female screw portion 28 of about one turn is formed inside the tip of this outer tube 27. It is designed so that it can be screwed into a male threaded portion 17 provided on the outer periphery of the base of the coupler 16.

As mentioned above, the grease hose 20 according to the present invention
In this example, the base side 1/2 of the rubber tube 21 is connected to the metal pipe 25.
Since the outer pipe 27 having rigidity is slidably provided on the metal pipe 25, when the grease hose 20 is fixed to the injector 10, it is shown in FIG. Similarly, the outer tube 27
When the rubber tube 21 is exposed so as to overlap with the metal pipe 25, the rubber tube 21 has flexibility, and the direction of the coupler 16 can be freely changed with respect to the direction of the injector 10. This means that you will be able to do so. Also, by sliding the outer pipe 27 toward the tip of the grease hose 20, as shown in FIG.
When the female screw portion 28 at the tip is screwed into the male screw portion 17 provided at the base of the coupler 16, the direction of the coupler 16 is fixed by the outer tube 27, and at this time, the outer tube 27 is made of flexible rubber. Since it covers the pipe 21 and partially overlaps the metal pipe 25,
The orientation of the coupler 16 is fixed with respect to the orientation of the metal pipe 25, that is, the orientation of the injector 10, and the grease hose 20 has rigidity like the grease nozzle 15.

In order to change the orientation of the coupler 16 from a free state to a fixed state in this way, simply slide the outer tube 27 toward the tip of the grease hose 20, and bring the tip of the outer tube 27 into contact with the base of the coupler 16. Turn the outer tube 27 once, and then attach the outer tube 27 to the coupler 16 by holding the female thread 28 at the tip of the outer tube 27.
Since it only needs to be screwed and locked, it can be easily changed.

Incidentally, the outer pipe 27 and the coupler 16 must be securely engaged so that they do not loosen or come off during the greasing operation. However, if secure locking is possible,
The fitting is not limited to screwing, but may be a locking protrusion and an L-shaped locking groove, or a fitting with some resistance to attachment and detachment.

Further, the rubber tube 21 is not limited to one wrapped with a spiral metal wire 22, but today, as the performance of mechanical devices increases, grease is injected at a high pressure of 500 kg/cm ² . In some cases, it is necessary to increase the pressure resistance, and metal pipes 2
It is desirable to reinforce the part not covered by the rubber tube 21 with a metal wire 22 or the like, and the pressure resistance can be increased by, for example, 20 to 40% with the metal wire 22, and it is sufficient to appropriately reinforce the pressure resistance according to the pressure resistance of the rubber tube 21. It is something.

[Effects of the invention] The present invention is a grease hose for a grease gun, which is composed of a flexible part such as a pressure-resistant rubber pipe and a rigid part covered with a metal pipe, etc., and also has a rigid outer pipe. The coupler is slidably provided so that it can cover exposed parts such as flexible rubber tubes, so by sliding the outer tube and exposing the flexible part, the coupler can be oriented freely. Since it can be changed, it is possible to easily chuck grease nipples located at corners, ground planes, and bends. Also, by sliding the outer tube,
When the flexible part is covered by the outer tube,
The orientation of the coupler is fixed in a fixed direction relative to the injector, and the coupler can be positioned and chucked by holding the injector in the same way as the grease nozzle to the grease nipple of the grease inlet.

Furthermore, switching the partitions to bring out the characteristics of the grease hose and the characteristics of the grease nozzle can be easily done by simply sliding the outer pipe, so the conventional grease hose and grease nozzle can be easily switched. This eliminates the inconvenience of having to replace and attach the grease hose to the injector each time, and since the grease hose can be firmly fixed to the injector, it does not need to be connected even when injecting grease at high pressure. This can prevent grease from leaking from the parts.

[Brief explanation of the drawing]

1 and 2 are half-sectional views of a grease hose according to the present invention, and FIG. 3 is a sectional view of a conventional grease nozzle. 10... Injector, 15... Grease nozzle, 1
6...Coupler, 17...Male thread part, 18...Base metal fitting, 19...Male thread part, 20...Grease hose, 21...Rubber tube, 22...Metal wire, 25...
...Metal pipe, 27...Outer tube, 28...Female thread, 31...Inlet, 33...Grease nipple.

Claims (1)

[Scope of utility model registration request] In a grease hose having a coupler for chucking a grease nipple at the tip, the base side of the grease hose is covered with a rigid pipe such as a metal pipe having a length of at least 1/2 of the total length of the grease hose, and the tip side is covered with a rigid pipe such as a metal pipe with a length of at least 1/2 of the total length of the grease hose. A flexible pipe such as a rubber pipe is exposed, and a rigid outer pipe having a length that can cover the exposed flexible pipe portion is slid against the rigid pipe portion. A grease hose for a grease gun, characterized in that the hose can be freely installed and the tip of the outer tube can be locked and fixed to the coupler.