JP4568316B2 - header - Google Patents

Description

  The present invention relates to a header, and more particularly, to a header used for a branch pipe portion for branching into a plurality of branch pipes in a hot water supply / water supply pipe.

Conventionally, many headers have been proposed for use in this type of branch piping site. (For example, see Patent Documents 1, 2, and 3.)
JP-A-8-60712 JP 2006-17170 A JP-A-2005-106194

However, as one structure of the conventional header, as disclosed in Patent Documents 1 and 2, a branch nut (branch pipe) is formed by tightening a cap nut on a male screw of a male part for branch connection protruding from the header body. Tube), which requires a large number of cap nuts to be screwed onto the male part, and tightens one to a few of the cap nuts. Inadequate or forgotten to tighten, accidents such as the building / facility becoming drained. Furthermore, it was very troublesome and time-consuming to check whether or not the cap nut was fully (completely) tightened.
As another structure of the conventional header, as disclosed in Patent Document 3, a taper screw hole is formed on the header body side, and a male part having a taper male screw is used as the pipe joint for branch piping. However, in such a structure, it is difficult to work to make the tightening rotational torque of the taper screwing portion to an appropriate value. As with the structure of, there were accidents such as the buildings and facilities becoming drained.

  Therefore, the present invention has a simple structure, and an operator can quickly and easily connect a branch pipe fitting to the header body, and whether or not the connection has been made normally is easy. The purpose is to prevent accidents, etc., that can be confirmed by the workers.

In order to achieve the above object, according to the present invention, the header body is provided with a plurality of branch connection holes, and the branch pipe fitting is provided with an intubation part to be inserted into the hole. The header body is formed with a locking recess on the outer surface of the surrounding wall portion forming the hole, and the inner tube insertion portion is inserted into the hole joint to the normal insertion position. Then, a resilient locking member that automatically locks into the locking recess is provided , and further, the elastic locking member is provided at two leaf spring pieces in parallel and at the tip of the leaf spring piece. A rectangular parallelepiped having a locking claw portion formed, the locking claw portion being locked to a stepped portion of the locking recess , and the header body having the branch connection hole portion. A plurality of shaped projections, and the base ends of the two leaf spring pieces are externally fitted four corners fitted on the distal ends of the rectangular parallelepiped projections. It has been continuously to the cap part.

The header body is provided with a plurality of branch connection holes, and the branch pipe fitting is provided with an intubation section to be inserted into the hole, and the header body includes the hole section. A locking convex portion is formed on the outer surface of the surrounding wall portion forming the locking joint, and the locking convex portion is automatically inserted into the pipe joint when the inner insertion tube portion is inserted to the normal insertion position with respect to the hole portion. A resilient locking member for locking to the portion is provided , and the resilient locking member further includes two parallel leaf spring pieces and a notch window portion formed in the leaf spring piece. The inner edge portion of the cutout window portion and one end edge of the locking projection portion are locked , and the elastic locking member is configured such that the inner insertion tube portion extends to the hole up to the normal insertion position. When it is inserted into the unit, it automatically generates a bullet sound for confirmation of normal insertion and locking when it is locked. Moreover, the said step part is formed in the reverse gradient so that a latching claw part may not detach | leave.

  According to the present invention, the operator can connect the branch pipe fitting to the header body quickly and easily. And an operator can confirm easily and reliably that the inner intubation part was inserted to the regular insertion position with respect to the hole of the header main body. As a result, it is possible to reliably prevent an accident such as a building or facility being drained. Furthermore, the header body has a simple shape and can be easily manufactured by plastic or the like.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
In the first embodiment shown in FIGS. 1 to 5, the header 1 includes a plastic header body 2, a pipe joint 4 for a branch pipe 3, and a pipe joint 6 for a base pipe (main pipe) 5. Etc. The header body 2 includes, for example, a rectangular tube-shaped projection 7 having a rectangular cross section 7 and a branch connection hole 13 in FIG. 5, and the plurality of projections 9 are arranged at a predetermined pitch. Yes. As shown in FIG. 6, the header main body 2 may have a shape including a circular pipe portion 8 and a plurality of cuboid protrusions 9 arranged in a plurality of rows. Further, as shown in FIG. 1 (or FIG. 13), a rectangular parallelepiped protrusion 11 to which the pipe joint 6 for the base pipe 5 is attached is integrally protruded from one end face 10 of the header body 2.

The branch pipe projection 11 has a simple straight (circular) hole 13 perpendicular to the main hole 14. The main hole 14 is disposed in the longitudinal (axial center) direction of the header body 2 and is open on one end face 10 side and closed on the other end face 23 side. Alternatively, as shown in FIG. , 23 may be provided so that the main holes 14 open to both end faces 10, 23, and the headers 1, 1 may be connected (connected) to each other.
The pipe joint 4 for the branch pipe 3 is provided with an intubation section 15 that is inserted into the hole 13 of the header body 2. The inner insertion tube 15 has a tip diameter-reduced guide taper portion 15a and (two) seal grooves 36, 36 recessed in the outer peripheral surface. A sealing material 37 such as an O-ring is fitted in the sealing groove 36.

  Further, the rectangular parallelepiped protrusion 9 of the header body 2 is formed with locking recesses 16 and 16 in the left-right width direction in the vicinity of the root. Since the projecting portion 9 is provided with the hole portion 13 (as described above), (in other words) the locking recess 16 is formed on the outer surfaces 20a and 20a of the surrounding wall portion 20 forming the hole portion 13. Concave. In the illustrated example, the base ends of the outer surfaces 20a and 20a corresponding to two parallel surfaces of the rectangular parallelepiped (joint portion with the rectangular tube portion 7) are orthogonal to the longitudinal direction of the header body 2 in plan view. Locking recesses 16, 16 are formed.

Then, a fitting 17 made of metal plate or plastic is provided on the pipe joint 4. The locking member 17 provided on the pipe joint 4 is continuous from two parallel side surfaces of the outer fitting quadrangular cap portion 19 (inverted quadrangular shallow dish type) having a hole 18 and the outer fitting quadrangular cap portion 19. Plate spring piece-like elastic locking members 21, 21 extending in a shape.
That is, as shown in FIGS. 3 to 2, if the inner tube 15 is inserted into the hole 13 of the header body 2, the pipe joint 4 is automatically engaged at the normal insertion position shown in FIG. A resilient locking member 21 that locks in the locking recess 16 is provided. The pipe joint 6 includes a joint body 6A having an outer flange portion 22 protruding in the middle in the axial direction and having the inner insertion tube portion 15 protruding from the outer flange portion 22 in the proximal direction.
In FIG. 1 to FIG. 3, a state where the outer flange portion 22 of the joint body 6 </ b> A is in contact with the distal end surface 9 </ b> A of the protrusion 9 of the header body 2 (see FIG. 2) corresponds to the normal insertion position.

More specifically, the elastic locking member 21 includes two parallel (rectangular) leaf spring pieces 21A and 21A, and a locking claw portion 21B formed at the leading edge of the leaf spring piece 21A. Have. 3 has been pushed into the stepped portion 16A of the locking concave portion 16 of the rectangular projection 9 as shown by the arrow F in FIG. 3, and is in sliding contact with the outer surface 20a and elastically in contact with the outer surface 20a. The pawl portion 21B is automatically locked to the stepped portion 16A of the locking recess 16 by the elastic biasing force of the leaf spring piece 21A.
Further, the above-described leaf spring pieces 21A and 21A will be described in detail. The base end of the leaf spring piece 21A is connected to the externally fitted square cap portion 19 that is fitted on the distal end portion of the rectangular parallelepiped protrusion 9. . The external fitting quadrangular cap portion 19 is externally fitted to the protrusion 9 in a close fitting manner.

As shown in FIG. 5 or FIG. 6, when the locking recesses 16 and 16 are formed in a direction (left-right width direction) perpendicular to the axis of the header body 2 when viewed in plan (from FIG. 3) As described above, it is easy to visually confirm whether or not the elastic locking member 21 (locking claw portion 21B) is locked in the locking recesses 16 and 16.
The reference examples shown in FIGS. 7 and 8 illustrate the case where the locking recess 16 is formed in the axial direction (longitudinal direction) of the header body 2. The configuration of FIG. 7 has an advantage that the height dimension can be reduced and the size can be reduced. Further, there is an advantage that the locking recess 16 can be easily formed. 7, 8, and 10 (D), the locking recess 16 has a dovetail shape with a deepened groove, and the stepped portion 16 </ b> A has an inclined surface (reverse slope). Corresponding to the inclination of the locking claw portion 21B of the bullet locking member 21, the locking claw portion 21B has a shape that is unlikely to be unexpectedly detached.

By the way, as the pipe joint 4 used in the present invention, other structures can be freely selected as long as the inner pipe 15 is provided, but it is exemplified in FIGS. 1 to 3 and FIG. The following description will be made on the pipe joint. The joint body portion 25 includes the joint body portion 25. The joint body portion 25 includes the inner insertion tube portion 15 and the outer flange portion 22, and the insertion tube portion 26 into which the branch pipe 3 is fitted. For example, it is made of plastic. Moreover, a passage hole 27 is provided along the axis (L ₁₅ ).
On the outer peripheral surface of the insertion tube portion 26, a concave groove 29 into which the sealing material 28 is fitted is formed, and a plurality of small protruding protrusions 30 are provided to protrude. A slightly large-diameter intermediate portion is formed through the stepped portion 31, and a concave circumferential groove 32 is formed in the intermediate portion, and a cylindrical cover 33 made of transparent plastic is fitted. 34 is a C-shaped tightening ring made of a metal such as spring steel that generates a strong elastic squeezing force. A single circumferential cut is made by enlarging the cut when no pipe is inserted and tightening ring. An enlarged small piece 35 for enlarging the diameter of 34 is held between the cuts. Then, when the tip of the pipe (the branch pipe 3 in FIG. 1) is inserted from the upper side to the lower side in FIG. 2, the tip surface of the pipe hits the enlarged diameter small piece 35 and the enlarged diameter small piece 35 jumps out of the tightening ring 34. Therefore, the tightening ring 34 strongly tightens the outer peripheral surface of the pipe (branch pipe 3) (by its own elastic force), and the inner peripheral surface of the pipe (pipe 3) is against the outer periphery of the insertion pipe portion 26. The pipe (pipe 3) is retained by pressure contact (the connection piping work is completed). Due to the presence of the sealing material 28, the inner surface of the pipe (pipe 3) and the outer surface of the insertion tube portion 26 are sealed.

In the illustrated example, a male screw is formed on the outer periphery of the tip of the cylindrical cover 33, a cap 38 is screwed, and the clamping ring 34 is enclosed (stored) so as not to jump out of the cylindrical cover 33.
In FIG. 1, the pipe joint 6 for connecting the base pipe 5 has the same configuration as that of the branch pipe joint 4 described above, and thus the repeated description is omitted. The shape (configuration) of the rectangular parallelepiped protrusion 11 is the same as that of the rectangular parallelepiped protrusion 9, and the pipe joint 6 is attached by a locking tool 17 a corresponding to the locking tool 17.

  Next, FIG. 9A shows a leaf spring piece 21A and a locking claw portion 21B as the elastic locking member 21 illustrated in FIG. 1, FIG. 2, FIG. 3, FIG. As shown in FIG. 9B, it is also preferable that the locking claw portion 21B folds the sheet metal material into a double to increase the strength and rigidity. Further, the impact locking member 21 may be made of a plastic material with the thickness further increased, and the shape shown in FIG. 9A or the claw portion 21B having a local thickness (not shown). ).

Next, FIGS. 10A to 10D are diagrams illustrating various shapes of the locking recess 16 and the stepped portion 16A formed in the header body 2, and FIGS. As shown in FIG. 10C, this is a case where the locking recess 16 is provided as a concave groove having a rectangular cross section, and the stepped portion 16A is formed at a right angle with respect to the outer surface. 10 (D), as shown in FIG. 7 and FIG. 8, the locking recess 16 is formed as a dovetail groove, and the stepped portion 16A is formed in an inclined shape in which the groove width increases in the groove depth direction. Has been.
And it is also free to form the locking recess 16 as shown in FIGS. That is, the width dimension of the header main body 2 and the like may be changed with the stepped portion 16A as a boundary instead of the concave groove shape.

Next, FIGS. 11 and 12 show a second embodiment of the present invention. That is, the pipe joint 4 is the same as that shown in FIGS. 1 to 3 and the like, but the header body 2 is provided with the locking protrusions 40 and 40 (without the recess 16). For example, the locking projections 40 are provided on the two parallel surfaces of the rectangular parallelepiped projection 9. The locking convex portion 40 has a horizontally long rectangular shape when viewed from the orthogonal direction to the surface of the surrounding wall forming the hole 13, and the lower side of the locking convex portion 40B forms the locking stepped portion 40A. It is a triangular mountain type having.

On the other hand, the locking tool 17B attached (fixed) to the pipe joint 4 similarly to the locking tool 17 shown in FIGS. 4 and 2 is locked to the locking projection 40 as shown in FIG. There are provided elastic locking members 21 and 21 having rectangular cutout windows 44.
That is, the leaf spring pieces 21A and 21A are continuously extended downward from two parallel surfaces of the external fitting quadrangular cap portion 19 having the hole 18 in the ceiling wall, and the notched window portion 44 is provided in the leaf spring piece 21A. The inner edge portion (lower side) 45 of the cutout window portion 44 and one end edge of the locking convex portion 40--the stepped portion 40A-- are configured to be locked. In the locked state shown in FIG. 12 (B), as shown in FIG. 2, the inner insertion tube 15 of the pipe joint 4 is inserted into the hole 13 of the header body 2 up to the normal insertion position.

As shown in FIG. 3, in the middle of the insertion tube 15 of the pipe joint 4 being inserted into the hole 13, as shown in FIG. 12A, the leaf spring piece 21A is placed on the (inclined) gradient surface 40B. When the front edge is slidably contacted and elastically deforms in the leg opening direction, and the lower side (inner edge) 45 of the cutout window 44 reaches the stepped portion 40A of the locking projection 40, its own elastic urging force is applied. Then, the leaf spring piece 21A is elastically deformed in the opening leg direction as shown in FIG.
When changing from FIG. 13 to FIG. 2 or when changing from FIG. 12 (A) to (B), when the impact locking member 21 is switched to the locked state, It emits bullets such as clicking, clicking, and punching to confirm insertion locking. With this bullet sound, the operator can reliably (by ear) confirm that the inner tube 15 of the pipe joint 4 has been inserted to the normal insertion position.
Since the leaf spring pieces 21A and 21A are large and exist outside, the bullet sound can be heard sufficiently large. Even in a noisy work site, the operator can easily and reliably confirm the normal insertion completion state by listening to the bullet sound.
By the way, the structure shown in FIGS. 11 and 12 can be applied to the connecting portion of the pipe joint 6 for the base pipe 5 in FIG. 1 (not shown).

Next, in still another embodiment shown in FIG. 13, the connection structure 46 connects (connects) a plurality of header bodies 2 and 2 to each other.
In other words, in order to connect the two header bodies 2 and 2 with the main holes 14 and 14 in the same axial center, the outer flange 47 is provided in the middle, and the main hole intubation sections 48 and 48 are disposed on both axial sides. The connecting short pipe tool 49 and the locking tools 17 and 17 illustrated in FIG. 4 are back-to-back, and the top wall portions 50 and 50 are brought into contact with each other. A rectangular parallelepiped projection 11A is provided on the other end surface 23, a locking recess 16c is formed near the base thereof, and the locking claw portion 21B of the locking tool 17 is locked, thereby connecting the short tube 49. The main hole 14 and the main hole 14 can be connected and connected in the same axial center via the axial hole 51. Thus, the header bodies 2 and 2 can be connected to each other with a simple connection structure.

7 and 8 (reference example) , the externally-fitted quadrangular cap portion 19 shown in FIGS. 2 and 3 is omitted. As shown in FIG. 2 and FIG. 3, when the external fitting quadrangular cap part 19 is configured to be tightly fitted to the rectangular parallelepiped protrusion 9 (the tip thereof) of the header body 2, the following operation is performed. The effect is demonstrated. That is, it is possible to use a general (lower) resin such as PE or cross-linked PE that is inexpensive and easy to manufacture for the large-sized and large-volume header body 2. In other words, the (high temperature) hot water tends to cause external leakage of the hot water by causing the protrusion 9 of the header body 2 of such a general heat-resistant resin to lose its shape and increase the inner diameter of the hole 13. However, the external fitting square cap part 19 made of metal (or heat-resistant resin) reinforces in an enclosed shape from the outside to prevent the protrusion 9 from being deformed (expanded), and to prevent external leakage of hot water. It can be effectively blocked.

  In the present invention, as described above, the header body 2 is provided with a plurality of branch connection holes 13, and the branch pipe fitting 4 is provided with an insertion tube 15 inserted into the hole 13. In the header body 2, a locking recess 16 is formed in the outer surface 20 a of the surrounding wall 20 that forms the hole 13, and in the pipe joint 4, the internal insertion tube 15 is formed in the hole 13. When the elastic insertion member 21 is automatically inserted to the normal insertion position, the elastic locking member 21 that automatically locks into the locking recess 16 is provided. Therefore, the structure is simple and easy to manufacture, and the operator can easily In addition, it is possible to quickly connect the branch pipe fitting 4 to the header body 2, thereby achieving a significant improvement in the efficiency of pipe connection work. In addition, an operator or the like can easily and surely confirm from the outside whether or not the connection has been made normally.

The elastic locking member 21 includes two parallel leaf spring pieces 21A and 21A, and a locking claw portion 21B formed at the tip of the leaf spring piece 21A. Since the locking claw portion 21B is configured to be locked to the stepped portion 16A, the structure is simplified, the manufacturing is further facilitated, and whether or not the operator is in a normal connection state easily and quickly from the outside. It can be confirmed visually (and hearing).
The header body 2 includes a plurality of rectangular parallelepiped protrusions 9 having the branch connection holes 13, and the base ends of the two leaf spring pieces 21A and 21A are the distal ends of the rectangular parallelepiped protrusions 9. The header body 2 can be manufactured inexpensively and easily with a general non-heat-resistant resin such as PE or cross-linked PE. The external fitting quadrangular cap part 19 can reinforce the rectangular parallelepiped protrusion 9 from the outer peripheral side, and can prevent the protrusion 9 from being softened and deformed by high-temperature hot water, thereby preventing external leakage of hot water.

The header body 2 is provided with a plurality of branch connection holes 13, and the branch pipe fitting 4 is provided with an insertion tube 15 inserted into the hole 13 so as to protrude. In addition, a locking projection 40 is formed on the outer surface 20a of the surrounding wall 20 that forms the hole 13, and the inner tube 15 is properly inserted into the hole 13 in the pipe joint 4. Since the elastic locking member 21 that automatically locks to the locking projection 40 when inserted to the position is provided, the structure is simple and easy to manufacture, and the operator can easily and quickly It is possible to connect the branch pipe fitting 4 to the header body 2 and achieve a significant improvement in pipe connection work.
The elastic locking member 21 has two parallel leaf spring pieces 21A and 21A, and a notch window portion 44 formed in the leaf spring piece 21A, and an inner edge portion of the notch window portion 44. 45 and the one end edge of the locking protrusion 40 are configured to be locked, so that the structure is simplified, the manufacturing is further facilitated, and whether or not the operator is in a normal connection state easily and quickly from the outside. Can be confirmed visually (and hearing).

Further, the bullet locking member 21 generates a bullet for confirming normal insertion locking when the inner insertion tube 15 is automatically locked when inserted into the hole 13 up to the normal insertion position. Therefore, the operator can confirm the normal connection work with his / her ears and prevent connection failure.
Further, since the stepped portion 16A is formed in a reverse gradient so that the locking claw portion 21B does not come off, it is possible to effectively prevent the locking claw portion 21B from coming off unexpectedly.

It is a front view which shows one Embodiment of this invention. It is an expanded sectional view of the principal part. It is a principal part expanded sectional view for description of the state in the middle of a connection. It is a perspective view which shows an example of a locking tool. It is a partially broken perspective view of the principal part. It is a partially broken perspective view of the principal part which shows other embodiment. It is a principal part expanded sectional view which shows a reference example . It is a partially broken perspective view of the principal part of a reference example . It is principal part explanatory drawing. It is principal part explanatory drawing. It is a perspective exploded view of a principal part showing still another embodiment. It is operation | movement explanatory drawing of the principal part. It is a principal part expanded sectional view which shows another embodiment.

2 Header body 4 Fitting 9 Projection
13 hole
15 Intubation section
16 Locking recess
16A Stepped part
19 External fitting square cap
20 Surrounding wall
20a exterior
21 Bullet locking member
21A leaf spring
21B Locking claw
40 Locking projection
44 Notch window
45 Inner edge (bottom)

Claims (4)

The header body (2) is provided with a plurality of branch connection holes (13), and the branch pipe fitting (4) has an inner tube (15) inserted into the hole (13). The header body (2) is provided with a locking recess (16) on the outer surface (20a) of the surrounding wall (20) forming the hole (13), and the pipe joint (4 ) Includes a resilient locking member (21 that automatically locks into the locking recess (16) when the inner insertion tube (15) is inserted into the hole (13) to a normal insertion position. ) it is provided,
Further, the elastic locking member (21) includes two parallel leaf spring pieces (21A) (21A) and a locking claw portion (21B) formed at the tip of the leaf spring piece (21A). And the locking claw portion (21B) is configured to be locked to the stepped portion (16A) of the locking recess (16),
The header body (2) includes a plurality of rectangular parallelepiped protrusions (9) having the branch connection holes (13), and the base ends of the two leaf spring pieces (21A) (21A) are A header characterized by being connected to an externally-fitted quadrangular cap part (19) that is externally fitted to the tip of the rectangular parallelepiped protrusion (9) . The header body (2) is provided with a plurality of branch connection holes (13), and the branch pipe fitting (4) has an inner tube (15) inserted into the hole (13). A protruding projection (40) is formed on the outer surface (20a) of the surrounding wall (20) forming the hole (13) in the header body (2), and the pipe joint ( 4), a resilient locking member that automatically locks to the locking projection (40) when the inner insertion tube (15) is inserted into the hole (13) to the proper insertion position. (21) is provided,
Further, the elastic locking member (21) includes two parallel leaf spring pieces (21A) (21A) and a notch window portion (44) formed in the leaf spring piece (21A). The inner edge (45) of the cutout window (44) and one end edge of the locking projection (40) are locked,
The header body (2) includes a plurality of rectangular parallelepiped protrusions (9) having the branch connection holes (13), and the base ends of the two leaf spring pieces (21A) (21A) are A header characterized by being connected to an externally-fitted quadrangular cap part (19) that is externally fitted to the tip of the rectangular parallelepiped protrusion (9) . When the inner tube (15) is automatically inserted into the hole (13) until the normal insertion position, the elastic locking member (21) confirms normal insertion locking. The header according to claim 1 or 2, which emits a bullet sound for use . The header according to claim 1, wherein the stepped portion (16A) is formed in a reverse gradient so that the locking claw portion (21B) is not detached .

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