JP5503367B2 - Saddle fitting - Google Patents

Description

  The present invention relates to a saddle joint used when connecting a branch pipe to a main pipe.

In general, when connecting a branch pipe to a main pipe through which tap water or gas is circulated, via a saddle joint provided with a saddle section fused to the main pipe and a branch pipe section serving as a branch pipe connection section. Has been done.
This type of saddle joint is usually configured as an EF (electro-fusion) joint, and the heating wire disposed inside the saddle portion is energized to generate heat, thereby melting the interface between the joint and the main pipe. The two are joined together.

  Conventionally, in order to join the saddle joint to the main pipe, first, the saddle joint is brought into contact with the main pipe, and is fixed to a fixed position by a clamp for fixing the saddle joint. In this state, the heating wire is energized. Then, the saddle joint and the main pipe are joined. Then, after waiting for the molten part to solidify, the clamp is removed from the saddle joint and the main pipe, and the joint is backfilled in the ground to complete the work.

  By the way, in recent years, from the request of omitting the solidification process of the melted part and the work process of removing the clamp, the saddle joint is fixed to the main pipe by the clamp, and the clamp is attached to the saddle joint and the clamp even after the saddle joint is joined to the main pipe. A so-called clamp-integrated saddle joint that is used by being buried in the ground while being attached to the main pipe is widely used. As such a saddle joint, for example, the one shown in Patent Document 1 below has been proposed.

  FIG. 4 is an exploded perspective view of the saddle joint 1 described in Patent Document 1. As shown in FIG. The saddle joint 1 shown in this figure includes a saddle 2 arranged on the upper surface of the outer periphery of the main pipe (not shown), a clamp member 3 mounted from the lower surface of the outer periphery of the main pipe, a bolt 4a, a seat plate 4b, and a nut 4c for connecting them. It is comprised from the fixing tool 4 which consists of.

  Saddle side flanges 5, 5 and clamp side flanges 6, 6 are respectively formed on the side edges of the saddle 2 and the clamp member 3, and the saddle side flange 5 is notched for fitting bolts 4 a, 4 a. 7 and 7 are formed, and through holes 8 and 8 through which the bolts 4 a and 4 a are inserted are formed in the clamp side flange 6.

  Under this configuration, when the saddle joint 1 is joined to the main pipe, the saddle 2 is attached to the upper face of the main pipe, the clamp member 3 is attached to the lower face of the main pipe, and the clamp side flanges 6 and 6 are respectively attached to the clamp side flanges 6 and 6 from below. Attach the bolts 4a, 4a, seat plates 4b, 4b, nuts 4c, 4c that have been inserted, and fit the bolts 4a, 4a into the notches 7, 7 so that the seat plate 4b rests on the upper surface of the saddle side flange 5. The clamp member 3 is hooked on the saddle 2. Then, the nuts 4c, 4c... Screwed into the bolts 4a protruding from the upper surface of the saddle side flange 5 are tightened, and the saddle joint 1 is fixed to the main pipe.

  In this state, the terminals 10 and 10 provided on the saddle 2 are energized, and the joining surfaces of the saddle 2 and the main pipe are heated and melted by heating wires (not shown) embedded in the saddle 2 to join them together. . The main pipe to which the saddle joint 1 is joined is buried in the ground without removing the clamp member 3.

JP 2003-4192 A

  However, according to the saddle joint 1 described above, the saddle 2 and the clamp member 3 are fixed to the main pipe by tightening the nut 4c using the bolt 4a, the seat plate 4b, and the nut 4c. The number of parts for fixing the clamp member 3 is large, and there is a problem that the cost increases due to these parts.

  Further, it is necessary to insert the bolt 4a into the through holes 8, 8,... Of the clamp side flanges 6, 6 from below, place the seat plate 4b on the upper surface of the saddle side flange 5, and tighten the four nuts 4c. Therefore, there is a problem that the connecting operation between the saddle 2 and the clamp member 3 is troublesome.

Therefore, the present invention provides the following means in order to solve the above problems.
The invention according to claim 1 is provided with a saddle that is formed with flanges on both side edges and is fused to the outer peripheral surface of the main pipe, and is disposed on the side facing the saddle along the outer peripheral face of the main pipe, A saddle joint for locking the saddle with the clamp member across the main pipe, the clamp member having a locking plate portion with which the lower surface abuts on the upper surface of the flange. The locking plate portion extends in the longitudinal direction along the axial direction of the saddle, and the locking plate portion extends in the longitudinal direction along the axial direction when the lower surface of the locking plate portion is brought into contact with the upper surface of the flange. A first notch groove is formed in the longitudinal direction on the upper surface of each flange formed to extend on both side edges, and is opposed to the first notch groove on the lower surface of the locking plate portion. second notch groove is formed in the longitudinal direction at a position , And having a fixing member for fixing over the first and insert fitted in the saddle in the insertion hole formed by the second cutout groove between the said clamping member in the longitudinal direction.

  The invention according to claim 2 is characterized in that the insertion hole is formed so that the dimension in the vertical direction gradually becomes smaller than the insertion direction of the fixing member.

  According to a third aspect of the present invention, the concave and convex portions are formed on the upper and lower surfaces of the fixing member, and the concave and convex portions that can be engaged therewith are formed on the bottom surfaces of the first cutout groove and the second cutout groove. It is characterized by being.

  According to the saddle joint of claim 1, the fixing member is inserted and fitted between the first notch groove and the second notch groove, and the saddle and the clamp member are simply fastened and fixed to the main pipe. There is an effect that can be done.

  According to the saddle joint of claim 2, the saddle and the clamp member can be firmly tightened by the main pipe as the fixing member is pushed between the first notch groove and the second notch groove. Can be firmly fixed to the main pipe.

  According to the saddle joint of claim 3, since the fixing member and one or both of the first notch groove and the second notch groove are engaged by the uneven portion, the fixing member comes out of each notch groove. And the saddle can be firmly fixed to the main pipe.

These are the exploded perspective views showing the saddle joint shown as an embodiment of the present invention. These are the longitudinal cross-sectional views of the saddle joint shown as embodiment of this invention. FIG. 3 is a partial sectional view of the saddle joint shown in FIG. 2 as viewed from the side. FIG. 5 is an exploded perspective view showing a conventional saddle joint.

Hereinafter, an embodiment of the saddle joint of the present invention will be described with reference to FIGS. 1 to 3.
FIG. 1 is an exploded perspective view showing a saddle joint 20 according to the present invention. Reference numeral 21 denotes a saddle, reference numeral 22 denotes a clamp member for fixing the saddle 21 to the main pipe, and reference numeral 23 denotes a saddle joint 21 and a clamp member 22. The fixing member which connects is shown.

  As shown in FIG. 2, the saddle 21 has a saddle portion 24 that is curved along the main pipe X and is fused to the upper surface X1 of the main pipe X.

A circular hole 25 for communicating the main pipe X and the branch pipe Y is formed in the center of the saddle part 24, and a cylindrical branch pipe part 26 rising upward along the outer edge of the hole 25 is provided. Is formed.
As shown in FIG. 1, terminals 27 and 27 are provided on both sides of the branch pipe portion 26. These terminals 27 and 27 are ends of the heating wire S embedded in the saddle portion 24 shown in FIG. Connected to the department.

  The saddle portion 24 has a curved shape with substantially the same curvature as the main pipe X so that it can be fused to the main pipe X, and substantially the entire inner surface thereof is in close contact with the outer peripheral surface X1 of the main pipe X. Thus, it is formed so as to be able to contact. At each side edge along the axial direction of the saddle portion 24, flanges 28, 28 projecting in the horizontal direction are formed.

The upper surface 28a of the flange 28 is formed with a first notch groove 29 extending in the longitudinal direction of the flange 28 and opening upward with a certain width dimension.
The first cutout groove 29 is formed with side surfaces 29b and 29c facing each other formed in a vertical direction and a flat bottom surface 29a formed between the side surfaces 29b and 29c facing each other. The bottom surface 29 a is inclined so that the depth dimension of the first notch groove 29 gradually decreases from one end of the flange 28 toward the other end. The bottom surfaces 29a and 29a of the first notch grooves 29 and 29 formed in the flanges 28 and 28 may be inclined in the same direction or in opposite directions. Either is acceptable.

  Further, an uneven portion 30 that repeats unevenness from one end side to the other end side is formed in the middle portion in the length direction of the bottom surface 29 a in the first cutout groove 29.

  The clamp member 22 is attached to the outer peripheral lower surface X2 side of the main pipe X shown in FIG. 2, and is connected to the saddle 21 attached from above the main pipe X to be flexible for locking the saddle 21 to the main pipe X. It is a member having the property, and is formed to be curved so as to surround the outer peripheral lower surface X2 of the main pipe X.

  As shown in FIG. 1, the side edge 31 of the clamp member 22 rises in the vertical direction, and the upper end edge of the side edge 31 has substantially the same width as the width dimension of the flange 28 toward the inside. A locking plate portion 32 formed by bending in the horizontal direction is provided.

  The locking plate portion 32 is formed so as to be able to go around from the outside of the flange 28 formed on the saddle 21 so that the lower surface 32a of the locking plate portion 32 contacts the upper surface 28a of the flange 28, A second notch groove 33 is formed on the lower surface 32 a of the locking plate portion 32 so as to face the first notch groove 29 and form an insertion hole 35 having a substantially rectangular cross section.

  The second notch groove 33 extends in the longitudinal direction of the locking plate portion 32, opens downward with the same width dimension as the first notch groove 28, and is vertically symmetrical with respect to the first notch groove 29. It is formed so as to have the shape of

  The bottom surfaces 33a and 33a of the second notch grooves 33 and 33 are formed so that the vertical dimension of the insertion hole 35 gradually decreases in one direction when facing the first notch grooves 29 and 29. The direction in which the vertical dimension gradually decreases is the direction in which the fixing member 23 is inserted into the insertion hole 35.

Further, between both end portions of the second cutout groove 33, a concavo-convex portion 34 is formed that repeats the concavo-convex in the middle portion in the length direction.
The concavo-convex portions 30 and 34 have surfaces formed so as to rise and incline toward the distal direction on the rear side and the front side with respect to the insertion direction of each convex portion, and the fixing member 23 inserted through the insertion hole 35 It is configured to be movable in the insertion direction but not movable in the opposite direction.

  In addition, a V-shaped groove 36 extending in the axial direction is formed at the center of the curved plate portion of the clamp member 22 so that the clamp member 22 can be easily opened in the left-right direction.

As shown in FIGS. 1 and 3, the fixing member 23 is a rod-like member that is inserted into the insertion hole 35 and fixes the connection between the flange 28 of the saddle 21 and the locking plate portion 32 of the clamp member 22.
The shape of the fixing member 23 is formed so that the vertical dimension gradually decreases in the insertion direction so as to follow the shape of the insertion hole 35, and when the fixing member 23 is inserted into the insertion hole 35. The vertical dimension is set slightly larger than the vertical dimension of the insertion hole 35 so that the upper and lower bottom surfaces 33a and 29a of the insertion hole 35 can be pressed by the upper and lower surfaces 23c and 23d.

  The length dimension of the fixing member 23 is not particularly limited as long as the fixing member 23 can be inserted into the insertion hole 35 and the saddle 21 and the clamp member 22 can be firmly fixed to the main pipe X. The length dimension of the insertion hole 35 is substantially the same, and the width dimension is set to be slightly smaller than the insertion hole 35.

Furthermore, the upper surface 23c and the lower surface 23d of the fixing member 23 are formed with uneven portions 37 that repeat the unevenness in the middle portion in the longitudinal direction.
As shown in FIG. 3, the concavo-convex portion 37 can move the fixing member 23 in the insertion direction, but when pulled in the opposite direction, both bottom surfaces 29a of the first and second cutout grooves 29 and 33, It is formed in the uneven | corrugated shape which becomes engaged with the uneven | corrugated | grooved parts 30 and 34 formed in 33a, and becomes immovable.

  Further, the concave and convex portions 30, 34, and 37 are positions where at least the fixing member 23 presses the upper and lower bottom surfaces 29 a and 33 a of the insertion hole 35 and the main pipe X can be firmly tightened by the saddle 21 and the clamp member 22. It is formed at a position where it can be engaged with each other when it reaches.

  The saddle 21, the clamp member 22, and the fixing member 23 are all formed by injection molding using a resin such as polyethylene.

Next, a method for joining the saddle joint 20 configured as described above to the main pipe X will be described.
First, the saddle 21 is disposed on the main pipe X, and the inner surface of the saddle portion 24 is brought into close contact with the upper surface X1 of the main pipe X. Next, the clamp member 21 is arranged in a direction in which the vertical dimension of the insertion hole 35 gradually decreases in one direction, and the saddle is expanded while the locking plate portion 32 is expanded left and right around the V-shaped groove 36. The main body X is mounted from below the main pipe X so that the lower surface 32a of the locking plate 32 faces the upper surface 28a of the flange 28.

  Here, since the insertion hole 35 is formed by making the first notch groove 29 and the second notch groove 33 face each other, the fixing member 23 is inserted into the insertion hole 35, and the saddle 21 and the clamp member 22 are attached to each other. Link. Further, when the fixing member 23 is further press-fitted into the insertion hole 35, the thickness dimension of the fixing member 23 is formed to be slightly larger than the vertical dimension of the insertion hole 35. Due to the thickness of the fixing member 23, the flange 28 positioned below the fixing member 23 is pressed downward, and the locking plate portion 32 positioned above the fixing member 23 is pressed upward to be slightly separated from each other. The saddle 21 and the clamp member 22 are pressed toward the outer peripheral surface of the main pipe X, and both are firmly fixed to the main pipe X.

  In this state, the terminal 27 formed in the saddle 21 is energized, the heating wire S embedded in the saddle portion 24 is heated, and the main pipe X side of the saddle portion 24 and the outer peripheral upper surface of the main pipe X in contact therewith X1 is melted, both are fused, and the branch pipe Y is connected to the branch pipe portion 26 as appropriate. The work is completed by backfilling the soil.

  As described above, according to the saddle joint 20 of the present invention, the saddle joint 20 can be easily clamped and fixed to the main pipe X simply by inserting the fixing member 23 into the insertion hole 35, and the working efficiency is improved. Is obtained. Further, since the vertical dimension of the insertion hole 35 is formed so as to gradually decrease in the insertion direction of the fixing member 23, the saddle 21 and the clamp member 22 are connected to the main pipe as the fixing member 23 is pushed into the insertion hole 35. The effect that the saddle 21 can be firmly fixed to the main pipe X can be obtained.

  Moreover, since the saddle 21 and the clamp member 22 can be reliably fixed only by the fixing member 23, the effect that the number of parts can be suppressed is acquired.

  Further, since the uneven portions 30, 34, 37 are formed in the first cutout groove 29, the second cutout groove 33, and the fixing member 23, the fixing member 23, the first cutout groove 29, and the second cutout groove 29 are formed. The notch groove 33 engages so that the fixing member 23 cannot be extracted from the notch grooves 29 and 33, and the saddle 21 can be firmly fixed to the main pipe X.

  In the present embodiment, the irregularities 34 and 30 are formed on both the upper and lower bottom surfaces 33a and 29a of the insertion hole 35, but are formed on either the bottom surface 33a or the bottom surface 29a. There may be. Moreover, although the uneven | corrugated | grooved parts 30,34,37 shall be repeatedly formed continuously in the intermediate part of the insertion hole 35 and the fixing member 23, it is not limited to this, The flange 28 and a locking wall part 32 is not particularly limited as long as it is engaged so that it cannot be pulled out at the time when it is firmly connected, and a plurality of one or discontinuous shapes that can be engaged with each other are not limited. It may be uneven.

  In the present embodiment, the depth dimensions of the first and second cutout grooves 29 and 33 are both formed so as to gradually become smaller in one direction. What is necessary is just to be formed small gradually in one direction, and the upper and lower bottom surfaces 33a and 29a of the insertion hole 35 are pressed up and down by inserting the fixing member 23, and only one of the depth dimensions is gradually smaller. It may be what was done.

Further, a window hole 38 penetrating between the plate surfaces may be formed on the plate surface of the clamp member 22 as indicated by a two-dot chain line in the drawing.
By forming the window hole 38 in the plate surface of the clamp member 22 in this way, the clamp member 22 can be flexibly bent, and the effect that the resin material to be used can be saved can be obtained.

20 Saddle joint 21 Saddle 22 Clamp member 23 Fixing member
24 Saddle portion 28 Flange 28a Flange upper surface 29 First notch groove 29a Bottom surface of first notch groove 30 Uneven portion 32 Locking plate portion 32a Upper surface of locking plate portion 33 Second notch groove 33a Second notch groove Bottom 34 Uneven portion 35 Insertion hole 37 Uneven portion 38 Window hole X Main pipe

Claims (3)

Saddle with flanges on both sides and fused to the outer peripheral surface of the main pipe,
A clamp member that is disposed on the side facing the saddle along the outer peripheral surface of the main pipe, and is formed with a locking plate portion that is in contact with the lower face of the upper face of the flange. A saddle joint that is sandwiched and locked by the clamp member,
The flange extends in a longitudinal direction along the axial direction of the saddle, and the locking plate portion extends in the axial direction when the lower surface of the locking plate portion is brought into contact with the upper surface of the flange. Formed to extend longitudinally along ,
A first notch groove is formed in the longitudinal direction on the upper surface of each flange formed on both side edges, and the longitudinal direction is located at a position facing the first notch groove on the lower surface of the locking plate portion. second notch groove is formed in,
An electrofusion type comprising: a fixing member that is inserted and fitted into an insertion hole formed by the first and second cutout grooves and fixes the saddle and the clamp member in the longitudinal direction. Saddle fitting. The saddle joint according to claim 1,
The saddle joint according to claim 1, wherein the insertion hole is formed so that a dimension in a vertical direction is gradually reduced with respect to an insertion direction of the fixing member. The saddle joint according to claim 1 or 2,
Concave and convex portions are formed on the upper and lower surfaces of the fixing member,
A saddle joint characterized in that a concavo-convex portion engageable with this is formed on the bottom surface of the first cutout groove and the second cutout groove.

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