JPH0422892Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a manual hydraulic tool used, for example, in the termination work of electric wires, by making the tool head part and the pump part detachable, so that only the pump part can be removed. This invention relates to a manual pump with detachable tools that can be used commonly and to which various hydraulic tools can be attached.

[Conventional technology]

In general, construction of new or replacement power transmission and distribution lines often involves a series of terminal processing operations such as cutting, stripping, and compressing wires, and each of these operations uses specialized hydraulic tools. Conventionally, this hydraulic tool has a structure in which the pump part and the tool head part are integrated, or the tool head part and the pump part are separated and connected by a hydraulic hose, making only the tool head part interchangeable. There were things.

[Problem that the invention attempts to solve]

In order to carry out the series of terminal processing operations described above, it is necessary to prepare in advance a dedicated tool suitable for each task. Since the parts are fixed and cannot be replaced, it is necessary to prepare various tools that are integrated with the pump even if in reality only the tool head part needs to be replaced. For this reason, the tool not only becomes expensive and imposes an economic burden on the user, but also the tool as a whole becomes a heavy body and requires a lot of effort to transport. In addition, when terminal processing work is carried out inside the work box of an aerial work vehicle, bringing various hydraulic tools with integrated tool heads and pump parts into the narrow box makes the footing difficult and the work difficult. This is undesirable in terms of safety and worker safety, and is also undesirable because there is a weight limit on aerial work vehicles.

In addition, a structure in which the pump part and the tool head part are separated and connected by a hydraulic hose can solve the above problem, but the tool head part and the pump part are separated by the hose. Therefore, when working, it was necessary to hold the tool head with one hand and position it relative to the electric wire while operating the pump with the other hand, resulting in poor work efficiency.
Therefore, sometimes the work is carried out by two operators, operating the tool head and the pump.
It was not possible to save labor and reduce costs.

This invention was devised to solve the above-mentioned problems, and it aims to make the pump part common to various tool heads, as well as to provide a removable manual tool that is easy to replace, has good operability, and is inexpensive. The purpose is to provide pumps.

[Means for solving problems]

As a specific means for achieving the above object, in a manual pump equipped with an oil tank, a pressurizing handle, a hydraulic pressure generating means consisting of a ram and a ram cylinder, etc., the pump body at the tip of the pump is formed into a bottomed cylinder. An end cap having a shaped opening to form an oil chamber, and an end cap having a built-in hydraulic joint rotatably inserted into the oil chamber, and the end cap is a stepped locking screwed onto the outer periphery of the bottomed cylindrical shape. This is a manual pump with a removable tool that is locked by a ring.

[Effect]

According to the tool removable manual pump configured as described above, various tool heads can be easily connected to the end cap fitted into the cylindrical oil chamber at the front of the pump body via hydraulic joints, and the tool head after connection can be The head can be freely rotated relative to the pump body by tightening the end cap to the end cap using a stepped locking ring, and can be fixed, making positioning easy.

〔Example〕

An embodiment of the present invention will be described below based on the drawings. FIG. 1 is a partially cutaway view of a manual pump with a removable tool (hereinafter referred to as manual pump) according to the present invention. In the figure, a manual pump 1 has a long, cylindrical handle part 3 provided at the rear (right side in the figure) of a pump body 2 by fitting or other means, and an oil 4 stored inside the handle part 3. an oil tank 5 for storage, a hydraulic pressure generating means (not shown) built into the body 2, a pressure handle 6 for operating the hydraulic pressure generating means, and a tool attaching/detaching section A at the tip (left side) of the body 2.
The main parts are: A cap 3A is screwed onto the rear end of the handle portion 3, and by removing the cap 3A, the stopper 5A of the oil tank 5 can be opened to easily replenish and replace the oil 4.
The hydraulic pressure generating means (not shown) is a known pump mechanism consisting of a ram cylinder and a ram, and as the ram slides up and down in the ram cylinder, oil 4 in the oil tank 5 is sucked to form pressure oil. The pressure handle 6 is connected to this ram piston. The tip of the body 2 has a cylindrical shape with a bottom, and an oil chamber R is formed inside.
The end cap 7 is rotatably fitted into the oil chamber R, and is screwed onto the outer periphery of the body 2, which has a cylindrical opening with a bottom, to prevent the end cap 7 from slipping out and to prevent its rotation. It is composed of a stepped locking ring 8. The end cap 7 has a built-in hydraulic joint C (female coupler) consisting of a steel ball 9 and a spring 10 that biases the steel ball toward the valve closing side.
It is designed to be coupled in a pair with a male coupler provided on the tool head section, which will be described later. Further, a female thread 7A is threaded into the left opening of the end cap 7 (hydraulic joint C) so that a tool head can be screwed into it. Reference numerals 11 and 12 are O-rings and back-up springs that prevent pressure oil from leaking in the oil chamber R, and 13 and 14 are O-rings and back-up springs that prevent pressure oil from leaking when the male coupler on the tool head side is connected. ring and back-up spring. 1
Reference numeral 5 denotes a supply oil passage for pressurized oil, which communicates with the ram cylinder (not shown), and numeral 16 denotes a return oil passage for hydraulic oil on the tool head side, which communicates with the oil tank 5.

A tool head used for electric wire terminal processing work or other power transmission/distribution line work is connected to the manual pump 1 constructed as described above. An example of this is shown in FIGS. 2 and 3. Figure 2 shows an example in which a hydraulic compression tool P used for terminal processing work is connected to a manual pump 1, and Figure 3 shows a hydraulic cutting tool S.
This is the head part of the. As shown in FIG. 3, a male coupler M corresponding to the hydraulic coupling (female coupler) C of the manual pump 1 is provided on the tool heads S and P, and is screwed into a female thread 7A formed in the opening of the end cap 7. By providing the external thread F, the tool head S can be easily connected to the manual pump 1. Further, after connection, the tool heads S and P can be freely rotated together with the end cap 7 by loosening the stepped locking ring 8, and can be fixed in rotation by tightening, so that positioning with respect to the electric wire can be easily performed.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that various modifications and embodiments may be made without departing from the spirit of the invention. For example, a quick coupling may be used for the hydraulic coupling provided on the end cap and the tool head, so that the tool head can be quickly attached and detached.

[Effect of idea]

As is clear from the above explanation, the detachable manual pump of the present invention allows the manual pump to be used in common with various tool heads, and also enables direct connection without using a hydraulic hose. It is necessary to prepare only the tool head necessary for the work, and therefore it can be purchased at low cost, greatly reducing the economic burden. In addition, since the weight is significantly reduced, the labor required during transportation is also reduced.

In addition, since the tool head and manual pump can be connected integrally, workability and operability are superior compared to the conventional structure in which the tool head and pump are connected using a hydraulic hose, and work efficiency is improved. At the same time, labor savings can be achieved. Furthermore, by providing a cap on the handle, oil can be easily replaced and replenished.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway view of the manual pump with a detachable tool according to the present invention, Figure 2 is a diagram showing a hydraulic compression tool connected to the manual pump with a detachable tool as an example, and Figure 3 is a diagram showing a hydraulic cutting tool. It is a diagram. 1... Manual pump with removable tool, 2... Pump body, 3A... Cap, 7... End cap, 8... Stepped locking ring, 9... Steel ball, 10...
...Spring, A...Tool attachment/detachment part, C...Hydraulic joint, R...Oil chamber.

Claims (1)

[Scope of utility model registration request] In a manual pump equipped with an oil tank, a pressurizing handle, and a hydraulic pressure generating means consisting of a ram and a ram cylinder, the pump body at the tip of the pump is opened in the shape of a cylinder with a bottom to form an oil chamber. A tool removable type, characterized in that an end cap having a built-in hydraulic joint is rotatably inserted into the oil chamber, and the end cap is locked by a stepped locking ring screwed onto the outer periphery of the bottomed cylinder. manual pump.