JPH0724568U - Anticorrosion sleeve stretcher - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose of the present invention is to reduce the diameter of an upper half portion into an elastic sleeve having an outer diameter that can be fitted into a through hole of a water faucet and a lower half portion into a branch hole of a metal main pipe. Regarding a stretcher exclusively for anti-corrosion sleeves, which is formed by inserting a corrugated corrosion-resistant metal sleeve,
The purpose is to expand the anticorrosion sleeve by inserting the stretcher from above the branch hole. A fitting shaft capable of holding an anticorrosion sleeve including a recessed portion, which is a means for reducing the diameter of a metal sleeve, and an expansion shaft corresponding to the inner diameter after the diameter expansion of the metal sleeve are provided above the fitting shaft. A stretcher with an anticorrosion sleeve, characterized in that it is connected by a guide shaft with a tapered bottom communicating with the recessed groove and a slideable guide sleeve is fitted on the expansion shaft by receiving a certain pushing force. is there.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The main idea is to fit a reduced-diameter corrosion-resistant metal sleeve in an elastic sleeve that has an outer diameter that allows the upper half to fit into the through hole of the water faucet and the lower half to fit into the branch hole of the metal main pipe. The present invention relates to a stretcher exclusively for the anticorrosion sleeve to be inserted.

[0002]

[Prior art and its problems]

 A conventional stretcher (expansion mounting tool) for this type of anti-corrosion sleeve is composed of a single corrosion-resistant metal sleeve, and the one that expands the lower end of the sleeve after inserting it into the branch hole has a tapered tip. The purpose was achieved by simply inserting the Stretcher from above, so the Stretcher itself could be used with a simple rod with a tapered tip.

On the other hand, a corrosion-resistant sleeve having a two-member structure in which a reduced diameter corrosion-resistant metal sleeve is fitted to the elastic sleeve, and the elastic sleeve is formed by inserting the metal sleeve into the branch hole and then expanding the diameter of the metal sleeve. As shown in Fig. 5, the elastic sleeve (f) has a recessed part (e) as a diameter reduction means as an anticorrosion sleeve of a structure in which the expansion hole is expanded and crimped to the inner circumference of the branch hole or the through hole of the water dip It was known that a metal sleeve (d) having a groove was simply inserted.

In the conventional anticorrosion sleeve (b) as shown in FIG. 5, if the stretcher is inserted from above, it may come out of the metal sleeve (d) or the elastic sleeve (f) and fall into the main pipe. 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, expand the diameter of the elastic sleeve (f) by pressing and expanding the diameter-reducing recessed part (e) of the metal sleeve (d) with both shoulder taper surfaces (c) and (c) of the expansion member (a). Was to expand in the radial direction. (See, for example, Japanese Unexamined Patent Publication No. 4-254091).

[0005]

[Means for solving problems]

 In order to solve the above-mentioned problems of the conventional stretcher, the present invention is an improvement of the anticorrosion sleeve itself consisting of two members, an elastic sleeve and a metal sleeve of reduced diameter, and as shown in FIG. By providing a locking hook c at the upper end of a metal sleeve a having a reduced diameter by providing a recessed portion b communicating in the axial direction at one location, and engaging this with the upper edge of the elastic sleeve d, Dedicated to anti-corrosion sleeves, the connection between the metal sleeve a and the elastic sleeve d is made to be hard so as to give sufficient resistance to the downward force acting on the metal sleeve (d) when the stretcher is inserted from above when expanding the diameter. Is intended to provide a stretcher.

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 the guide shaft with 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.

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

[0008]

[Action]

 By adopting the above structure, the stretcher of the present invention pushes down the above-mentioned anticorrosion sleeve inserted into the branch hole through the stretcher, so that the recessed portion of the metal sleeve is guided by the guide groove and easily expanded.・ By providing a guide sleeve that has the function of expanding the diameter and is slidable on the expanding shaft by receiving a certain pushing force, the role and guide of centering when inserting the branch hole of the anticorrosion sleeve It has a special effect called a nest that works.

Further, the O-ring or the like provided on the expansion shaft has an effect of suppressing 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]

【Example】

 Hereinafter, the structure of the stretcher of the present invention will be described in more detail based on an embodiment shown in the drawings. In FIGS. 1 to 3, 1 is a metal main pipe, 2 is a saddle, and 3 is a water diversion provided on the saddle. A stopper 4 is a branch hole formed in the main pipe 1, and 5 is an anticorrosion sleeve. As shown in FIG. 4, the diameter difference step portion is provided between the upper half e and the lower half f. It is fitted into an elastic sleeve d provided with g and is composed of a recessed portion b as a diameter reducing means and a corrosion-resistant metal sleeve a having an engaging hook c at its upper edge. Is the stretcher of the present invention described below.

The stretcher 6 has a recess 7a into which the metal sleeve recess b of the corrosion-preventing sleeve 5 in the reduced diameter state is fitted, as shown in FIG. A fitting shaft 7 having an outer diameter in which the sleeve is fitted and held, and an expanding shaft 8 having an outer diameter into which the corrosion-resistant sleeve 5 after expansion can be fitted are provided above the fitting shaft 7. A tapered guide shaft 9 is connected between the shaft 8 and the guide shaft 9, and the guide shaft 9 is provided 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. It was formed.

Further, the expanding shaft 8 has a guide sleeve 11 which is 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. Is slidably fitted, and an O-ring 12 is attached to a position where the expanding shaft 8 and the inner surface of the guide sleeve 11 are in contact with each other, so that the guide sleeve 11 does not exert an upward external force above a certain level. As long as it does not slide.

The presence of the guide sleeve 11 having the above-described structure is particularly significant in an anticorrosion sleeve 5 of this kind whose outer surface is the elastic sleeve d, because the elastic material such as rubber constituting the outer shell allows passage of the water faucet with a small diameter difference. It is extremely effective in preventing slippage when contacting the metal surface of the hole 3 ′ or the branch hole 4 and catching 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 a circular cross section, and one that achieves the above object. If so, the cross-sectional shape thereof is not particularly limited, and a means having an equivalent action to the above O-ring, for example, a spring that presses the upper edge of the guide sleeve 11 downward is used. It is also 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, 13 shown in FIGS. 1 and 2 is 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 located at the main pipe 1. Is set in a state of being brought into contact with the upper surface of the guide sleeve 11, and above the measuring rod 13 penetrating the auxiliary pipe 13a, the amount of movement of the guide sleeve 11, that is, the anticorrosion sleeve which is fitted to the fitting shaft 7 in advance. Detecting the complete expanded position of the anticorrosion sleeve 5 correctly by marking 13 at a distance equal to the distance from the lower end of the fitting shaft of the stretcher 6 to the complete movement of the expansion shaft 8 on the stretcher 6. You can do it.

[0017]

[Effect of device]

 As described above, according to the stretcher of the present invention, when expanding the diameter-reduced metal sleeve of the anticorrosion sleeve, the recess of the metal sleeve is guided by pushing down the rod of the stretcher using the handle. The diameter can be expanded accurately while it is guided on the shaft and moved on the shaft, and co-rotation occurs even when it is rotated if necessary in combination with the locking hook structure of the metal sleeve. It has the special effect of not letting it happen.

Further, in the case of the one equipped 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 operation of mounting the anticorrosion sleeve is remarkably improved. It also has the effect of being able to do so, and it brings many benefits that conventional stretchers could not expect.

[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)

[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 an inner diameter after the diameter expansion of the metal sleeve are provided above the fitting shaft, and a space between the insertion shaft and the recessed portion of the fitting shaft. A stretcher having an anticorrosion sleeve, characterized in that the guide shaft is connected by a guide shaft having a tapered bottom communicating with the groove, and a guide sleeve which is slidable by receiving a constant pushing 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.