JP3306502B2 - Branch saddle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch saddle used for branching tap water, gas, and the like, and more particularly, to preventing breakage of an electric insulating cylinder inserted in a saddle fastening bolt. Regarding the branch saddle.

[0002]

2. Description of the Related Art As shown in Japanese Patent Publication No. 61-48037, for example, a saddle type water faucet used for tap water is provided with a semicircular saddle having a water faucet body on an upper part thereof.
It is composed of a holding saddle of substantially the same shape, and bolts and nuts for fastening both saddles to a water main.

In the saddle type water faucet having such a structure, it is common that the saddle and the holding saddle are formed of cast iron, and the bolt and the nut are formed of stainless steel. If the materials are different, electrolytic corrosion may occur due to a potential difference between the two.

In order to prevent this, as shown in FIG.
A synthetic resin flanged insulating cylinder 4 is inserted into the bolt insertion holes 3 of the saddle 1 and the holding saddle 2, so that the upper and lower saddles 1, 2 and the bolts 5 and the nuts 6 do not come into contact with each other. It is.

[0005] Recently, since there is a tendency to provide a rotation preventing projection 7 for the head 5 a of the bolt 5 on the lower surface of the holding saddle 2, the flange 4 a of the insulating cylinder 4 on the holding saddle 2 side has two projections. Downward insulating pieces 4b that can be inserted between the heads 7 are continuously provided to insulate the head 5a and the protrusion 7 from each other.

[0006]

The protrusion 7 for preventing rotation as described above is usually formed simultaneously with the molding of the holding saddle 2. At this time, as shown in an enlarged manner in FIG. 8, the continuous corner portions 8 of the both protruding portions 7 generally have a curved surface in order to facilitate die-cutting of a molded product. Further, even if the continuous corners are formed at right angles, if the saddle surface is powder-coated with a synthetic resin material, it is inevitable that the corners become curved.

When such a curved surface is formed, when the downward insulating piece 4b of the insulating cylinder 4 is inserted between the two protrusions 7,
The shoulder of the downward insulating piece 4b abuts on the continuous corner 8 of the protrusion 7 to form a gap C between the flange 4a and the lower surface of the holding saddle 2.

In this state, the bolt 5 is inserted and the nut 6
When tightening is performed, a bending load acts on the flange portion 4a, which may cause breakage and impair insulation.

Usually, the surfaces of both saddles 1 and 2 are
As described above, the rust prevention treatment is performed by powder coating of a synthetic resin material. As described above, when the insulating cylinder 4 is strongly pressed in a state where the gap C is formed, the insulating cylinder 4 is biased. The powder-coated surface of the portion that comes into contact with and strongly presses may crack or peel off, and rust may be generated at that portion.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. By mounting the insulating cylinder in close contact with the lower surface of the saddle, the insulating cylinder may be damaged or the powder coating surface may be cracked. It is an object of the present invention to provide a branch saddle that can be prevented from being generated.

[0011]

In order to achieve the above object, the present invention provides a saddle and a holding saddle which are disposed on the outer peripheral surface of a tubular body so as to face each other. A bolt and a nut which are electrically insulated and tightened by an insulating cylinder having a bolt and a nut, and a projection for locking the bolt is formed on the surface of the saddle on the side where the head of the bolt contacts, and a flange of the insulating cylinder is provided. A branch saddle formed by connecting an insulating piece in contact with the protruding portion to an outer edge of the protruding portion, and recessed in a crossing portion between an inner surface of the protruding portion and a lower surface of the saddle in a thickness direction of the saddle. A relief groove is formed.

In the branch saddle of the present invention, it is preferable that the relief groove is formed on the metal surface of the saddle before painting.

[0013] In the branch saddle of the present invention, it is preferable that the relief groove is formed on the painted surface of the saddle after painting.

In this case, it is desirable that the relief groove has an arc-shaped cross-sectional structure oriented in a direction perpendicular to the thickness direction of the saddle.

It is preferable that at least one end of the escape groove extends to the outer edge of the saddle.

[0016]

The relief piece of the insulating cylinder is formed by forming a clearance groove recessed in the thickness direction of the saddle at the intersection of the inner surface of the detent projection of the bolt head and the lower surface of the saddle. Even if it is inserted into the position, the shoulder of the insulating piece does not come into contact with the continuous corner of the projection, so that the insulating cylinder can be securely attached to the lower surface of the saddle and mounted.

[0017]

An embodiment of the present invention will be described below with reference to the drawings.

The same members as those of the prior art are denoted by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, 1 is a saddle, 2 is a holding saddle, and the surfaces thereof are powder-coated with epoxy resin. A water faucet main body 9 is attached to the upper surface of the saddle 1.

On the lower surface of the fastening portion of the holding saddle 2, a pair of projections 7, 7 extending in the axial direction of a water pipe (not shown) are continuously provided downward, and opposed inner surfaces of the projections 7. , The inner surface of the protrusion 7 and the lower surface 12 of the saddle,
As shown in an enlarged manner in FIG. 2, a relief groove 10 having a semicircular cross section that is recessed in a direction perpendicular to the plate thickness of the holding saddle 2, that is, vertically upward, is formed. Although the cross-section of the relief groove 10 may not be semicircular, when forming the relief groove on the metal surface, stress concentration can be avoided by eliminating corners.

The escape groove 10 is preferably formed up to the entire edge of the holding saddle 2 as shown in FIG.
This facilitates removal of dust or the like that has entered the escape groove 10.

As shown in FIG. 3, the flange 4
a, downward insulating pieces 4b are continuously provided on both sides of the
By inserting the cylindrical portion formed with 1 into the bolt insertion hole 3 while being elastically deformed in the diameter reducing direction, it is prevented from dropping downward. The dimension between the two insulating pieces 4b is substantially the same as the dimension between the projections 7 so that the projections can be inserted between the projections 7 without play.

As described above, if the relief groove 10 is formed in the continuous corner of the projection 7, when the insulating tube 4 is inserted into the bolt insertion hole 3 as shown in FIG. In addition, there is no danger that the shoulder of the downward insulating piece 4b abuts on the continuous corner of the projection 7 to form a gap.

As a result, the flange 4a of the insulating cylinder 4 comes into close contact with the lower surface 12 of the holding saddle 2, and when the bolt 5 is tightened, the flange 4a and the like are prevented from being damaged by a bending load acting on the flange 4a.

Further, since the downward insulating piece 4b does not hit the inner surface of the projection 7, there is no risk of cracking or peeling of the powder coating surface applied to the surface.

Since the escape groove 10 faces vertically upward,
When the holding saddle 2 is formed by casting, the die can be easily removed.

FIGS. 5 and 6 show another embodiment of the present invention. In this embodiment, the same projections 7 and relief grooves 10 as described above are provided in a direction perpendicular to the water pipe. Things. The outer end of the escape groove 10 extends to the side edge of the holding saddle 2.

In this embodiment, the same operation and effect as described above can be obtained.

It is desirable that the relief groove 10 is formed simultaneously with the casting of the holding saddle 2 from the viewpoint of the number of steps, but it may be formed by any suitable means after the casting.
At this time, since there is no need to consider die cutting, the direction and shape of the escape groove 10 are not particularly limited.

The escape groove of the present invention is preferably formed on the metal surface of the saddle before the coating is applied, and at least in the state where the coating is applied, the lower surface of the saddle holder and the flange of the insulating cylinder are formed. May be formed to a depth that allows close contact in a planar manner. Further, for example, when this groove is applied to a saddle that does not require painting, the groove depth may be set to such a degree that the formation of the curved surface of the continuous corner portion can be eliminated.

Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions without departing from the gist of the present invention. Included in the invention. For example, in this embodiment, the projections 7 are formed so as to face each other, but the number of the projections 7 may be one.

[0032]

According to the present invention, the following effects can be obtained.

(A) Since the insulating cylinder can be attached in close contact with the saddle, there is no danger that a local bending load will act on the insulating cylinder when tightening the bolts. Therefore, the insulating cylinder may be damaged or the saddle may be damaged. The occurrence of peeling or the like on the painted surface is prevented.

(B) As a result, the saddle is prevented from being corroded or rusted.

(C) According to the fourth aspect of the present invention, since the die can be easily removed, the relief groove can be formed at the same time as the casting of the saddle, and the number of steps can be reduced.

(D) According to the fifth aspect of the invention, dust or the like that has entered the escape groove can be easily swept out.

[0037]

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention.

FIG. 2 is an enlarged sectional view showing a bolt head side of the holding saddle.

FIG. 3 is a perspective view of an insulating cylinder.

FIG. 4 is a bottom view of a main part of the holding saddle.

FIG. 5 is a bottom view of a main part of a holding saddle showing another embodiment of the present invention.

FIG. 6 is a vertical sectional side view taken along line AA in FIG. 5;

FIG. 7 is a partially cutaway front view showing a conventional example.

FIG. 8 is an enlarged sectional view of the holding saddle on the bolt head side.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Saddle 2 Holding saddle 3 Bolt insertion hole 4 Insulation cylinder 4a Flange 4b Insulation piece 5 Bolt 6 Nut 7 Projection 9 Water faucet main body 10 Escape groove 11 Slot 12

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) E03B 7/00 F16L 41/06 F16B 43/00

Claims (5)

(57) [Claims] 1. A saddle and a holding saddle which are disposed on the outer peripheral surface of a tubular body so as to face each other, and a bolt and a nut which electrically insulate and tighten both ends of both saddles by an insulating cylinder having a flange. In addition to forming a protrusion for locking the bolt on the surface of the saddle on the side where the head of the bolt abuts, an insulating piece that abuts the protrusion on the outer edge of the flange of the insulating cylinder. A branch saddle comprising a plurality of continuous branch saddles, wherein an escape groove is formed at an intersection of an inner surface of the protrusion and a lower surface of the saddle so as to be recessed in a thickness direction of the saddle. 2. The branch saddle according to claim 1, wherein the relief groove is formed on a metal surface of the saddle before painting. 3. The branch saddle according to claim 1, wherein the relief groove is formed on a painted surface of the saddle after painting. 4. The branch saddle according to claim 2, wherein the relief groove has an arc-shaped cross-sectional structure oriented in a direction orthogonal to the thickness direction of the saddle. 5. The branch saddle according to claim 1, wherein at least one end of the escape groove extends to an outer edge of the saddle.