JP2504220Y2 - Anti-corrosion sleeve stretcher - Google Patents

Description

[Detailed description of the device]

[0001]

[Field of Industrial Application] The present invention has a reduced diameter inside an elastic sleeve having an outer diameter that can be fitted into the through hole of the water faucet and the lower half into the branch hole of the metal main pipe, respectively. The present invention relates to a stretcher for exclusive use with an anticorrosion sleeve, in which a corrosion resistant metal sleeve is inserted.

[0002]

2. Description of the Related Art A conventional stretcher (expansion mounting tool) for this type of anti-corrosion sleeve is composed of a single corrosion-resistant metal sleeve, and the lower end of the sleeve is expanded after it is inserted into a branch hole. What you do is to insert a stretcher with a tapered tip from above,
Because the purpose was achieved, the stretcher itself could be used with a simple tapered tip bar.

On the other hand, there is provided a two-component anticorrosion sleeve in which a reduced diameter corrosion resistant metal sleeve is fitted to the elastic sleeve, and the elastic sleeve is expanded by inserting the metal sleeve into the branch hole and then expanding the diameter of the metal sleeve. As a corrosion-preventing sleeve having a structure of expanding and crimping to the inner periphery of the branch hole or the through hole of the water dip, a metal having a recessed portion (e) as a diameter reducing means in the elastic sleeve (f) as shown in FIG. It was known that the sleeve (d) was simply inserted.

In the conventional anticorrosion sleeve (b) as shown in FIG. 5, when the stretcher is inserted from above, the metal sleeve (d) or the elastic sleeve (f) may come out and fall into the main pipe. Therefore, as shown in the same figure, the conventional stretcher has its diameter-expanding member (a) inserted in advance in the anticorrosion sleeve (b) and then inserted into the branch hole. While pulling up, the both-sided shoulder taper surface (c) and (c) of the expanding member (a)
Then, the diameter-reduced concave portion (e) of the metal sleeve (d) was expanded and expanded in diameter, and the elastic sleeve (f) was expanded in the radial direction. (See, for example, Japanese Patent Laid-Open No. 4-254091).

[0005]

In order to solve the above-mentioned problems of the conventional stretcher, the present invention firstly improves the anticorrosion sleeve itself which is composed of two members, that is, an elastic sleeve and a metal sleeve of a reduced diameter. As shown in FIG. 3, a locking hook c is connected to the upper end edge of a metal sleeve a having a recessed portion b communicating in the axial direction at at least one location on the sleeve peripheral surface and having a reduced diameter. By engaging with the upper edge portion, the connection between the metal sleeve a and the elastic sleeve d is made hard and sufficient resistance against the downward force acting on the metal sleeve (d) when the stretcher is inserted from above when expanding the diameter. The purpose of the present invention is to provide a stretcher exclusively for anticorrosion sleeves.

That is, a fitting shaft capable of retaining a metal sleeve including a recessed portion before expanding the diameter is provided at the tip, and an expanding shaft corresponding to the inner diameter after expanding the diameter of the metal sleeve is provided above the fitting shaft. A means for connecting with a guide shaft having a tapered bottom communicating with the recessed groove and fitting a slidable guide sleeve on the expanding shaft by receiving a constant pushing force is used.

A means of providing a measuring rod for confirming the expanded position of the anticorrosion sleeve is also used at the upper end of the rod of the stretcher.

[0008]

With the structure of the stretcher of the present invention, by pressing the anticorrosion sleeve inserted into the branch hole through the stretcher, the recessed portion of the metal sleeve is guided to the guide groove and easily pressed. By providing a guide sleeve that has the function of expanding and expanding the diameter and that can be slid on the expansion shaft by receiving a certain pushing force, it has the function of centering when inserting the branch hole of the anticorrosion sleeve. It has a special function called a nest that serves as a guiding function.

Further, the O-ring or the like provided on the expanding shaft has a function of restraining the movement of the anticorrosion sleeve unless the guide sleeve exerts a pushing-up resistance above a certain level when the anticorrosion sleeve is inserted.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the stretcher of the present invention will be described in more detail below with reference to the embodiments shown in the drawings. In FIGS. 1 to 3, 1 is a metal main pipe, 2 is a saddle, and 3 is a saddle on the saddle. As shown in FIG. 4, the water diversion tap 4 is a branch hole formed in the main pipe 1, and 5 is an anticorrosion sleeve.
It is fitted into an elastic sleeve d having a diameter difference stepped portion g between an upper half portion e and a lower half portion f, and is provided with a recessed portion b as a diameter reducing means and a locking hook c on the upper edge. The stretcher according to the present invention is composed of a corrosion-resistant metal sleeve a and a stretcher 6 according to the present invention described below.

As shown in FIG. 3, the stretcher 6 has a concave portion 7a into which the metal sleeve concave portion b of the corrosion-preventing sleeve 5 in the reduced diameter state fits, as shown in FIG. Fitting shaft 7 with an outer diameter for fitting and holding
And an expansion shaft 8 having an outer diameter above which the corrosion-resistant sleeve 5 after expansion can be fitted, and the fitting shaft 7 and the expansion shaft 8 are connected by a tapered guide shaft 9. At the same time, the guide shaft 9 is formed with an inclined recess 9a which communicates with the recess 7a of the fitting shaft and whose groove bottom gradually moves to the surface of the expanding shaft 8.

Further, the expanding shaft 8 is provided with a guide sleeve 11 slightly larger than the outer diameter or the outer diameter of the anticorrosion sleeve 5 in a reduced diameter state, and slightly smaller than the inner diameter of the through hole 3'of the water faucet. The guide sleeve 11 is slidably fitted, and an O-ring 12 is attached to a position where the expansion shaft 8 and the inner surface of the guide sleeve 11 are in contact with each other. I did not try to do it.

The existence of the guide sleeve 11 having the above structure is
In particular, in this type of anticorrosion sleeve 5 whose outer surface is the elastic sleeve d, when an elastic material such as rubber constituting the outer shell comes into contact with the metal surface of the through hole 3 ′ of the water faucet or the branch hole 4 with a small diameter difference. It is extremely effective in preventing slippage from occurring and causing a catch during insertion of the anticorrosion sleeve 5.

Since the O-ring 12 on the expanding shaft 8 plays a role of restricting the movement of the guide sleeve 11 as described above, the O-ring 12 is not limited to the one having the circular cross section, and the one for achieving the above object. However, the cross-sectional shape is not particularly limited, and a means having an equivalent action to the O-ring, for example, a spring that presses the upper edge of the guide sleeve 11 downward may be used instead of the O-ring. It is optional.

Further, in the stretcher of the present invention, the rod 10 having the handle 10a at the end is connected to the upper surface of the expanding shaft to be integrally formed.

Further, reference numeral 13 shown in FIGS. 1 and 2 denotes a measuring rod which is slidable by penetrating one side of the auxiliary pipe 13a fitted to the handle 10a, and the lower end 13b of which is provided at the main pipe 1. Is set in a state of being brought into contact with the upper surface of the anticorrosion sleeve 5 above the measuring rod 13 penetrating the auxiliary tube 13a, that is, the amount of movement of the guide sleeve 11, that is, the anticorrosion sleeve 5 fitted to the fitting shaft 7. However, it is possible to correctly detect the completely expanded position of the anticorrosion sleeve 5 by providing the markings 13c at intervals equal to the distance from the lower end of the fitting shaft of the stretcher 6 to the complete movement to the expansion shaft 8. Can be done.

[0017]

As described above, according to the stretcher of the present invention, when expanding the diameter-reduced metal sleeve of the anticorrosion sleeve, the rod of the stretcher is pushed down by using the handle so that the metal sleeve The diameter of the recess can be accurately expanded while the recess is guided on the guide shaft and moved on the expansion shaft, and even if it is rotated as necessary, it works together with the locking hook structure of the metal sleeve. It has a special effect that co-rotation does not occur.

Further, in the case of the one provided with the measuring rod, the insertion position of the anticorrosion sleeve can be accurately grasped due to the difference in the height of the water faucet which differs depending on the manufacturer, so that the accuracy of the work of mounting the anticorrosion sleeve can be remarkably improved. The effect is also obtained,
It brings many benefits that cannot be expected from conventional stretchers.

[Brief description of drawings]

FIG. 1 is an overall vertical cross-sectional view showing a positional relationship of a stretcher immediately before expanding an anticorrosion sleeve.

FIG. 2 is a vertical cross-sectional view showing a state of the stretcher after expanding the anticorrosion sleeve.

FIG. 3 is a perspective view showing a main part of the stretcher of the present invention.

FIG. 4 is a perspective view of an anticorrosion sleeve.

FIG. 5 is a perspective view showing a main part of a conventional wearing tool (stretcher).

[Explanation of symbols]

 1 Metal main pipe 2 Saddle 3 Water tap 4 Branch hole 5 Corrosion-proof sleeve 6 Stretcher 7 Fitting shaft 8 Expansion shaft 9 Induction shaft 10 Rod 11 Guide sleeve 12 O-ring 13 Measuring rod

Claims (2)

(57) [Scope of utility model registration request] 1. A fitting shaft capable of holding a metal sleeve including a recessed portion before the diameter expansion, and an expansion shaft corresponding to the inner diameter after the diameter expansion of the metal sleeve are provided above the fitting shaft, and a recessed portion of the fitting shaft is provided between them. A stretcher having an anticorrosion sleeve, which is connected by a guide shaft having a tapered bottom which communicates with a groove, and a guide sleeve which is slidable by receiving a constant push-up force is fitted on the expansion shaft. 2. The stretcher for anticorrosion sleeve according to claim 1, wherein a measuring rod for confirming the expanded position of the anticorrosion sleeve is provided on the handle portion at the upper end of the rod of the stretcher.