JP7285708B2 - Pipe inner layer structure and pipe inner layer member used therefor - Google Patents

Description

TECHNICAL FIELD The present invention relates to an inner layer structure of a pipe using an inner surface material arranged along the inner peripheral surface of the pipe and an inner layer member of the pipe used therein, particularly for repairing existing relatively large-diameter pipes such as sewage pipes. The present invention relates to a pipe inner layer structure using a suitable inner surface material and a pipe inner layer member used therein.

Conventionally, many proposals have been made for inner layer structures of pipes using inner surface materials suitable for repairing existing pipes such as aged sewage pipes.

As an example, the inner layer structure of the pipe proposed by the present applicant uses economical members, simplifies the installation work by saving the labor of assembling, and has durability for a long time even after the work is completed. There is (see Patent Document 1).
The inner layer structure of this pipe consists of rigid rings arranged along the circumferential direction of the inner peripheral surface of the existing pipe at predetermined intervals in the pipe axial direction, and a rigid straight member having notches formed at predetermined intervals on the center side of the existing pipe arranged at predetermined intervals in the circumferential direction of the rigid ring; and projections corresponding to the notches of the rigid straight members The synthetic resin inner surface material is made of a strip-shaped synthetic resin inner surface material having ridges, and by fitting the protrusions of the synthetic resin inner surface material to the notches of the rigid straight material, the synthetic resin inner surface material is attached to the inner peripheral surface of the existing pipe. The pipes are sequentially arranged along the circumferential direction and in the axial direction of the pipe without gaps, and the gaps between the existing pipe and the synthetic resin inner surface material are filled with the curable filler.

By the way, in the inner layer structure of the pipe of Patent Document 1, the synthetic resin inner surface material is arranged along the circumferential direction of the inner peripheral surface of the existing pipe, so that the inner surface material does not cause unevenness in the pipe axial direction. As such, it is difficult to arrange with high precision, and as the repair length of the existing pipeline increases, the trouble of installing the inner surface material increases.

In order to deal with this problem, as shown in FIG. 30, an inner member fixing member 10 provided with a fitting portion to which the inner layer member 20 is fitted; proposed an inner layer structure of a pipe consisting of a band-like inner layer member 20 installed on an inner surface member fixing member 10 disposed on a fixing member 30 (see Patent Document 2).
Here, the inner layer member 20 is fitted to the inner member fixing member 10 by using, for example, a combination of an inner member 21 made of a strip-shaped panel made of synthetic resin and an inner member connecting member (fastener) 22. Adjacent inner surface members 21 to be attached are connected by inner surface member connecting members (fasteners) 22 .
After the inner layer member 20 is installed, the gap between the inner peripheral surface of the pipe P and the inner layer member 20 is filled with a hardening material to form a hardened layer 40 .

JP 2006-316539 A JP 2014-70421 A

The inner layer structure of the pipe of Patent Document 2 solves the problem of the inner layer structure of the pipe of Patent Document 1. The stop piece 22b is provided with projections 21a, 22a extending in a flat plate shape in the inner diameter direction of the pipe, respectively. When the stop piece 22b is opened in the circumferential direction of the pipe P to engage the engaging piece 21b of the inner surface member 21, the engaging piece 22b of the inner surface member connecting member 22 engages the engaged piece 21b of the inner surface member 21. There is a problem that a large reaction force is generated at the time of contact, and a large pressing force is required for locking.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pipe inner layer structure and a pipe inner layer member used therein that can facilitate the work of installing the inner layer member.

In order to achieve the above object, the inner layer structure of a tube of the present invention is such that one inner layer member extending in the axial direction of the tube extends outward in the inner diameter direction of the tube, and another inner layer member extending in the axial direction of the tube extends outward. An inner layer structure of a pipe formed in a pipe by relatively displacing inward in the inner diameter direction of the pipe and locking, wherein the one inner layer member is a protrusion projecting outward in the inner diameter direction of the pipe and a locking piece provided at the tip of the ridge and protruding from the ridge in the circumferential direction of the pipe. and a locked portion provided at the tip of the projected ridge, protruding from the projected ridge in the circumferential direction of the pipe and engaged with the locking piece. , the ridges of the locking portion and the ridges of the locked portion are substantially opposed to each other in the circumferential direction of the pipe, and the ridges of the locking portion and/or the ridges of the locked portion are , are formed in a convex shape opposite to the circumferential direction of the pipe with respect to the protrusions of the engaged portion or the protrusions of the engaging portion, which are substantially opposed to each other.
Here, the inner layer member of the pipe is a member forming the inner layer of the pipe, and includes an inner surface member (panel) and an inner surface member connecting member (fastener).
Moreover, the shape of the cross section of the tube includes, for example, a circular shape, a polygonal shape, and the like, and is not limited.
In addition, regarding the inner diameter direction of the pipe, the direction from the peripheral surface of the pipe to the pipe axis is the inward direction, and the opposite direction is the outward direction. Regarding the circumferential direction of the pipe, from the relationship between the pair of locking portions (protrusions) and the locked portion (protrusions), the locking portion (protrusions) viewed from the locked portion (protrusions) The direction to (the ridges of) the locking part (the ridges) is defined as the direction to the locked part (the ridges of the ridges) as viewed from the locking part (the ridges of the ridges). and

In this case, the one inner layer member and the other inner layer member each have a main body portion having a width substantially in the circumferential direction of the pipe, and the protrusion of the locking portion protrudes from the main body portion of the one inner layer member. and the projection of the locked portion protrudes from the main body portion of the other inner layer member and is provided with the locking portion having the convex shape and/or the projection of the locked portion. Both side surfaces of the ridge can be formed from the connecting portion with the main body portion toward the convex direction of the convex shape.

Further, the outer surface of the locking piece facing outward in the inner diameter direction of the tube and the outer surface of the locked piece facing inward in the inner diameter direction of the tube on the tip side are provided with curved surfaces. and the curved surface of the piece to be locked, the locking piece and the piece to be locked can be displaced relative to each other in the inner diameter direction of the pipe.

The locking piece has a locking surface, and the locked piece has a locked surface that locks with the locking surface, and when the locking portion and the locked portion are locked, , the locking surface has a surface oriented inward in the inner diameter direction of the pipe and a surface oriented in the direction of the protrusion of the locking portion in the circumferential direction of the pipe, and the locked surface is oriented in the inner diameter direction of the pipe and the circumferential direction of the tube.
Here, the locking piece (or locked piece) is a locking portion (or locked portion) defined by an extension line of the locking surface of the locking portion (or the locked surface of the locked portion). shows the region of the tip of the

Further, the inner layer member of the pipe according to the present invention is characterized by comprising at least one of the engaging portion and/or the engaged portion provided with the projection forming the convex shape.

According to the pipe inner layer structure and the pipe inner layer member used therein of the present invention, it is possible to provide the pipe inner layer structure and the pipe inner layer member used therein that can facilitate the work of installing the inner layer member.
More specifically, according to the tube inner layer structure and the tube inner layer member used for the tube inner layer structure of the present invention, the following effects are exhibited.
・The distance between the fulcrum and the point of force becomes longer, making it easier to open the locking part or the locked part, and a wide space can be secured between the locking part and the locked part. are less likely to interfere with each other, it is possible to easily engage with a small pressing force.
・A wide space can be secured between the locking piece (or the locked piece) and the projection of the locked portion (or the locked portion), and interference between the locked portion and the locked portion is less likely to occur. , when the locking portion (or locked portion) provided with a protrusion that forms a convex shape in the opposite direction to the protrusion of the substantially opposed locked portion (or locked portion) is locked, the pipe is approximately Since the direction of the projection of the locked portion (or locking portion) in the circumferential direction and the inward (or outward) direction in the substantially inner diameter direction of the pipe, that is, the locking direction is restored, the locking becomes easy.

Further, as in the invention according to claim 2, the projection of the locking portion (locked portion) is formed to be inclined from the connecting portion with the main body, so that the locking portion or the locked portion The part is easy to open and easy to lock.

In addition, as in the third aspect of the invention, sliding between the curved surface of the locking piece and the curved surface of the piece to be locked allows smooth displacement in the inner diameter direction of the pipe, so that locking is possible. It gets easier.

Further, as in the invention according to claim 4, in a state in which the locking portion and the locked portion are locked, the locking surface of the locking piece faces inward in the circumferential direction of the pipe. It has a surface oriented in the direction of the ridge of the locking portion in the inner diameter direction, and the locked surface of the locked piece faces outward in the circumferential direction of the pipe and the locked surface in the inner diameter direction of the pipe. By having a surface oriented in the direction of the ridge of the part, the locking surface and the locked surface come into contact with each other to restrict movement, and in addition to movement in the radial direction, Since the movement in the direction can also be restricted, the locked state can be made more stable.

The inner layer structure of a conventional pipe is shown, (a) is a cross-sectional view of the pipe, and (b) is an enlarged view of its main part. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows one Example of the inner-layer structure of the pipe|tube of this invention, and the inner-layer member of the pipe|tube used for it. It is explanatory drawing which shows the Example of the protrusion of the inner-layer member of the same pipe|tube, (a) shows a curved protrusion, (b) shows a bent protrusion, respectively. Examples of the locking piece and the locked piece of the inner layer member of the same pipe are shown, (a) shows a locking piece and a locked piece having a planar locking surface and a locked surface, and (b) shows a locking piece and a locked piece. FIG. 10 is an explanatory view showing a locking piece and a locked piece having projections on the locking surface and the locked surface, respectively; It is explanatory drawing which shows the locking piece of the inner-layer member of the pipe|tube. FIG. 5 is an explanatory view showing a modified embodiment of the tube inner layer structure of the present invention and the tube inner layer member used therein.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the tube inner layer structure and the tube inner layer member used for the tube inner layer structure of the present invention will be described below with reference to the drawings.

2 to 4 show an embodiment of the tube inner layer structure of the present invention and the tube inner layer member used therein.
The inner layer structure of the pipe and the inner layer member of the pipe used therein are such that one inner layer member extending in the axial direction of the pipe P and the other inner layer member are relatively displaced in the inner diameter direction of the pipe P and locked. Specifically, similar to the conventional inner layer structure of the pipe shown in FIG. By using a combination of the inner surface material 21 made of the panel and the inner surface material connecting member (fastener) 22, the adjacent inner surface materials 21 that are fitted and attached to the inner surface material fixing member (not shown) are attached to the inner surface material They are connected by connecting members (fasteners) 22 .

In this case, in this embodiment, the inner surface member 21 of the inner layer member has a ridge 21a extending in the pipe axis direction and a locked piece 21b extending in the pipe axis direction at the tip of the ridge 21a. In the present embodiment, the inner surface member connecting member (fastener) 22, which has a locked portion and is an inner layer member, includes a ridge 22a extending in the axial direction of the pipe and a tip of the ridge 22a extending in the circumferential direction of the pipe. It has an engaging portion provided with an engaging piece 22b protruding toward the engaged portion.
Here, "locked" and "locked" are relative terms, and depending on how you look at it, they can be interpreted in reverse. The word "locked" is used for the fastener 22, and the word "locked" is used for the inner surface member 21 on the fixed side.
The ridges 22a of the locking portion of the inner surface member connecting member (fastener) 22 are curved in the opposite direction to the direction of the ridges 21a of the locked portion of the inner surface member 21 and the locked portion in the circumferential direction of the pipe. A groove-like space 21c formed in the inner layer member, in this embodiment, the inner surface member 21, is formed on the rear surface of the engaging portion (having a convex shape). Since the projection 22a of the locking portion is curved in this manner, a wide space can be secured between the projection 22a of the locking portion and the piece to be locked 21b.
Further, when the engaging portion of the inner surface member connecting member (fastener) 22 and the engaged portion of the inner surface member 21 are engaged, the engaging portion of the inner surface member connecting member (fastener) 22 is engaged with the engaging piece 22b. slides along the shape of the outer surface of the locked piece 21b of the locked portion and displaces toward the inner surface member 21, and engages with the locked portion of the inner surface member 21 with elastic deformation of the ridge 22a. stop. Since the space 21c is formed, the movement of the locking portion is not restricted during locking.
Here, as shown in FIG. 3(b), the protrusion 22a of the engaging portion of the inner surface member connecting member (fastener) 22 is bent in the opposite direction to the engaged portion of the inner surface member 21 and the circumferential direction of the pipe. It can also be formed as
Here, the convex shape of the projection 22a of the engaging portion of the inner surface member connecting member (fastener) 22 means, in other words, a curved or bent shape such as an arc shape or a "<" shape. The curved shape and the bent shape can be curved or bent in multiple steps as well as in a single step, and can also be a shape that combines bending and bending.

In addition, among the inner layer members, the inner surface member 21 in this embodiment, and among the inner layer members, in this embodiment, the inner surface material connecting member (fastener) 22 is a main body having a width in the substantially circumferential direction of the pipe P. The ridge 21a of the locked portion and the ridge 22a of the locking portion project from the body portions 21f and 22f, respectively, and the ridge 22a of the locking portion has a convex shape. Both side surfaces of the inner surface material connecting member (fastener) 22 from the connecting portion with the main body portion in the convex direction of the convex shape of the protrusion 22a (in other words, the direction to the protrusion of the locking portion in the circumferential direction) It is designed to be formed towards

In addition, the locked piece 21b of the inner surface member 21 and the locking piece 22b of the inner surface member connecting member (fastener) 22 are provided with a curved surface on the tip end side, and the curved surface 21d of the locked piece 21b and the locking piece 22b The locking piece 22b and the locked piece 21b are displaced relative to each other in the inner diameter direction of the pipe P by sliding on the curved surface 22d. The locking can be facilitated by providing a curved surface on the distal end side of one of the locking piece and the piece to be locked. It is preferable because it can

Further, as shown in FIG. 4(a), the locked piece 21b of the inner surface member 21 has a surface shape to be locked that engages with the locking piece 22b of the inner surface member connecting member (fastener) 22. The locking piece 22b of the material connecting member (fastener) 22 has a surface-shaped locking surface 22e that locks with the locked piece 21b. , the engaged surface 21e of the engaged piece 21b faces outward in the inner diameter direction of the pipe and in the circumferential direction of the pipe in the direction of the ridge of the engaged portion. The locking surface 22e of the locking piece 22b has a surface oriented inward in the inner diameter direction of the pipe and in the direction of the projection of the locking portion in the circumferential direction of the pipe. there is In more detail, the locking piece (locked piece) and the projection of the locking portion (locked portion) are arranged such that the locking surface (locked surface) is the circumferential locking portion (locked portion). It is possible to divide by dividing by the surface extended in the direction of the protrusion of the stop part).
Here, as shown in FIG. 4(b), protrusions are formed on the engaging surface 21e of the engaging piece 21b of the inner surface member 21 and the engaging surface 22e of the engaging piece 22b of the inner surface member connecting member (fastener) 22. can also be provided, thereby making it possible to make the locked state stronger.

Further, as shown in FIG. 5, the projection 22a of the locking portion of the inner surface member connecting member (fastener) 22 has a connection width W1 between the projection 22a and the body portion which is larger than the width W2 of the tip end side of the projection 22a. is also formed to be large.

In addition, between the inner surface material 21 and the inner surface material connecting member (fastener) 22, in this embodiment, the engaged piece 21b of the inner surface member 21 and the protrusion 22a of the locking portion of the inner surface material connecting member (fastener) 22 A waterproof material 23 made of elastomer or the like is interposed between the enclosed inner top surfaces.

The above structure exhibits the following effects.
The protrusion 22a of the locking portion forms a convex shape opposite to the protrusion of the locked portion of the inner surface member 21, which is substantially opposed, in the circumferential direction of the pipe. The locking part can be easily opened, and a wide space can be secured between the locking part and the locked part, so that the locking part and the locked part are less likely to interfere with each other. It becomes possible.
・A wide space can be secured between the locking part and the locked part, and the locking part and the locked part are less likely to interfere with each other. Since the direction of the protrusions of the locking portion is restored inward (in substantially the inner diameter direction of the pipe), that is, in the locking direction, locking is facilitated.
- Since the protrusion of the locking portion is formed in a convex direction from the connecting portion with the main body portion, the locking portion can be easily opened and locked.
The sliding between the curved surface 21d of the locked piece 21b and the curved surface 22d of the locking piece 22b allows smooth displacement in the inner diameter direction of the pipe P, facilitating locking.
・By forming the connection width W1 between the projection 22a and the main body so as to be larger than the width W2 of the distal end side of the projection 22a, the strength of the locking portion is maintained and the distal end is Since the side can be elastically deformed easily, locking becomes easier.
By exerting these effects, it is possible to provide an inner layer structure of a pipe and an inner layer member of a pipe used therein, which can facilitate the work of installing the inner layer member 20 .

In the above embodiment, as shown in FIGS. 2 to 6(a), the ridges 22a of the locking portion of the inner surface member connecting member (fastener) 22 are replaced by the ridges of the locked portion of the inner surface member 21. However, instead of the protrusion 22a, as shown in FIG. The material (fastener) 22 may be formed so as to form a convex shape in the opposite direction to the ridges of the locking portion (other configurations can be combined as appropriate), or both the ridges 21a and 22a. can also be formed so as to form a convex shape in opposite directions.
Moreover, as shown in FIGS. 6(c) and 6(d), the inner surface members 21 can be directly connected to each other without using the inner surface member connecting members (fasteners) 22. FIG.

As described above, the inner layer structure of the pipe of the present invention and the inner layer member of the pipe used therein have been described based on a plurality of examples. The configuration can be changed as appropriate without departing from the scope of the invention, such as combining the configurations described in 1.1.

The inner layer structure of a pipe and the inner layer member of a pipe used therein of the present invention can provide an inner layer structure and an inner layer member of a pipe used therein that can facilitate the installation work of the inner layer member. It can be suitably used for the inner layer structure of a pipe using an inner surface material suitable for repairing an existing pipe with a large diameter, and for the inner layer member of a pipe used therefor.

REFERENCE SIGNS LIST 10 inner member fixing member 20 inner layer member 21 inner member 21a ridge 21b engaged piece 21c groove-shaped space 21d curved surface 21e engaged surface 21f main body 22 inner member connecting member (fastener)
22a Projection 22b Locking piece 22d Curved surface 22e Locking surface 22f Main body 23 Water stop material 30 Fixing member 40 Hardened layer P Pipe

Claims (5)

One inner layer member extending in the axial direction of the pipe is relatively displaced outward in the inner diameter direction of the pipe, and another inner layer member extending in the axial direction of the pipe is displaced inward in the inner diameter direction of the pipe. The inner layer structure of the tube formed in the tube by
both the one inner layer member and the other inner layer member have portions exposed inward in the inner diameter direction of the pipe;
The one inner layer member includes a ridge protruding outward in the inner diameter direction of the pipe, and a locking piece provided at the tip of the ridge and protruding from the ridge in the circumferential direction of the pipe. has a part
The other inner layer member includes a ridge protruding inward in the inner diameter direction of the pipe, and a receptacle provided at the tip of the ridge, protruding from the ridge in the circumferential direction of the pipe and engaged with the locking piece. and a locked portion including a stop piece;
the projection of the locking portion and the projection of the locked portion are substantially opposed to each other in the circumferential direction of the pipe,
The ridges of the locking portion and/or the ridges of the locked portion are oriented in opposite directions in the circumferential direction of the tube with respect to the ridges of the locked portion or the ridges of the locking portion that substantially face each other. An inner layer structure of a pipe characterized by forming a convex shape. the one inner layer member and the other inner layer member each have a main body portion having a width in a substantially circumferential direction of the pipe;
The protrusion of the locking portion protrudes from the main body portion of the one inner layer member,
the protrusion of the locked portion protrudes from the body portion of the other inner layer member;
Both side surfaces of the ridges of the locking portion and/or the locked portion having the ridges forming the convex shape are formed from the connection portion with the main body portion toward the convex direction of the ridges. The tube inner layer structure according to claim 1, characterized in that: An outer surface of the locking piece that faces outward in the inner diameter direction of the tube and an outer surface of the tip end that faces inward in the inner diameter direction of the tube of the locked piece are provided with curved surfaces,
The locking piece and the locked piece are displaced relative to each other in the inner diameter direction of the pipe while sliding between the curved surface of the locking piece and the curved surface of the locked piece. The inner layer structure of a pipe according to claim 1 or 2. The locking piece has a locking surface, and the locked piece has a locked surface that locks with the locking surface,
In a state where the locking portion and the locked portion are locked,
The locking surface has a surface oriented inward in the inner diameter direction of the pipe and in the direction of the projection of the locking portion in the circumferential direction of the pipe,
4. The locked surface has a surface oriented outward in an inner diameter direction of the pipe and in a direction of the projection of the locked portion in the circumferential direction of the pipe. The inner layer structure of the tube according to claim 1. At least one of the locking portion and/or the locked portion provided with the protrusion forming the convex shape according to any one of claims 1 to 4 is provided , and is exposed inward in the inner diameter direction of the pipe. A tube inner layer member characterized by having a portion .

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