JP2005009214A - Seal cap for grout joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seal cap for a grout joint, which can be surely attached to a connecting sleeve, which prevents leakage of grout, which facilitates insertion of an end of a reinforcement, and which can be simply molded by punching. <P>SOLUTION: The cap 1 is composed of a frame body 2 and a seal member 3; the frame body, which is obtained by press-molding a metal, has a fitting part 21 and a front frame 22. The fitting part 21 can be fitted into the sleeve 4, and the front frame 22 has a large-diameter hole part 22a. Locking parts 21a, which can be attached to/detached from the sleeve 4, are protrusively provided in six places on the inner peripheral surface of the fitting part 21 of the frame body 2. The seal member 3, which is obtained by press-molding crude rubber, has a hole part 32 for inserting the reinforcement, and a through-hole 33 for air vent is formed in the seal member 3. An outer peripheral part of a plate-shaped body 31 of the seal member 3 is bonded in the state of abutting on the inner surface of the front frame 22 of the frame body 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a seal cap for a grout joint.
[0002]
[Prior art]
Conventionally, as a joint structure of deformed reinforcing bars for injecting grout at a construction site, as shown in FIG. 3 (A), the ends of deformed reinforcing bars 5 and 5 are connected to both ends of the pipe-shaped connecting sleeve (joint) 4. Insert a predetermined dimension, inject grout 6 from the grout inlet 41 provided in the central portion of the connecting sleeve, fix the reinforcing bars by set screws 8 and 8 at both ends, and integrate the reinforcing bars and grout. There is a grout joint (see, for example, Patent Document 1). Then, when the grout 6 is injected into the connecting sleeve 4, both open end portions of the connecting sleeve into which the deformed reinforcing bars 5 and 5 are inserted as shown in FIG. 3 so that the grout does not leak out. The caps 7, 7 are fitted on.
[0003]
The specific structure of the cap 7 is as shown in FIG. 3 (B). The cap 7 is injection-molded using a hard rubber having a small elastic deformation amount, for example, natural rubber (neoprene rubber), and is fitted to both ends of the sleeve 4. The mating fitting portion 71 and the seal portion 72 into which the reinforcing bar 5 is inserted are integrally formed. The fitting portion 71 is formed thin so that it can be easily fitted to the end portion of the sleeve 4, and the seal portion 72 has sufficient strength to withstand the injection pressure of the grout in order to prevent leakage of the grout 6. It is hard and thick to get. Further, a U-shaped groove 73a is formed on the inner peripheral surface of the through hole 73 into which the reinforcing bar 5 is inserted in the seal portion 72 in order to more reliably prevent leakage of grout, and both sides of the U-shaped groove are A through hole 73 is formed of two tongue-shaped reduced diameter portions projecting inwardly. Further, as shown in FIG. 3, the outer peripheral surface of the reinforcing bar 5 is formed with an uneven surface 51 in a direction orthogonal to the axial direction, that is, in the circumferential direction, and the reduced diameter portion of the inner peripheral surface of the through-hole 73 is It becomes easy to surely fit to this uneven surface of the reinforcing bar, and the prevention of grout leakage is made more reliable. In order to further prevent the leakage of grout, the diameter-reduced portion is not limited to two, but three, four, and six as in Patent Document 1.
[0004]
The conventional example described above is of a type that is fitted to the outside of the opening end portion of the sleeve 4, but there is also a type of seal that is inserted into the inner surface of the opening end portion of the sleeve as another conventional example. This insertion type is ring-shaped and has an inner circumferential surface formed with a horseshoe-shaped groove that opens inward, that is, in the center direction. The outer circumferential surface of the reinforcing bar inserted into the hollow portion of this seal In addition, the opening of the groove is crimped.
[0005]
[Patent Document 1]
JP-A-5-171741 [0006]
[Problems to be solved by the invention]
However, the conventional cap 7 is thick in order for the seal portion 72 to prevent leakage of the grout as described above, that is, to obtain a strength sufficient to withstand the injection pressure (internal pressure) of the injected grout. This is of course difficult to deform. However, on the other hand, the hole diameter of the through-hole 73 must be slightly smaller than the small-diameter part of the concavo-convex part 51 of the reinforcing bar 5, and the thick seal part 72 is hard and difficult to deform. The operation of inserting the reinforcing bar 5 is made difficult. Further, there are many types of diameters of the reinforcing bars 5, and the through holes 73 of the seal portion 72 of the conventional cap 7 correspond to only reinforcing bars having a specific diameter, and the diameter is 1 from the diameter. Cannot handle reinforcing bars with large or small diameter. Therefore, it is necessary to prepare the cap 7 of the through-hole 73 which can respond | correspond to each diameter of the reinforcing bar 5 beforehand. Furthermore, since the conventional cap 7 is injection-molded by a mold, a high-priced mold is necessary, and the manufacturing cost naturally increases. Further, as shown in FIG. 3A, after the cap 7 made of hard rubber is fitted to both opening ends of the sleeve 4, cement is placed to construct the housing. It is not preferable that the cap made of hard rubber is embedded in the cap portion because the cap portion forms a border with cement.
[0007]
Further, in the case of a seal member of the type that is inserted into both openings of the sleeve 4, when the end of the reinforcing bar is inserted into the hollow portion of the seal member, the seal member is weakly positioned so The sleeve may move inward.
[0008]
Therefore, the object of the present invention can be securely attached to the sleeve, prevents leakage of the grout during filling of the grout, facilitates insertion of the end of the reinforcing bar, is easy to manufacture, and has a plurality of types of reinforcing bar diameters. It is an object of the present invention to provide a seal cap for a grout joint that can cope with the structure and does not cause edge cutting with cement even when the structure is inherent.
[0009]
[Means for Solving the Problems]
The seal cap of the grout joint according to the present invention is characterized by a frame body and a seal member. The frame body is a ring shape made of a hard material, and has a large fitting portion and a large fitting portion that can be fitted to the end portion of the sleeve. A front frame in which a diameter hole portion is formed, and the sealing member is composed of a plate-like main body made of a material having stretchability and a hole portion for inserting a reinforcing bar opened in the plate-like main body. The outer peripheral portion of the seal member is in contact with the inner surface of the front frame of the frame body.
[0010]
Another feature is that the sealing member is formed with air vent holes.
[0011]
Further, another feature is that the hard material of the frame is a metal.
[0012]
Another feature is that the raw material having the expansion and contraction performance of the sealing member is raw rubber.
[0013]
Further, another feature is that the fitting portion of the frame is formed with a locking portion for attaching to the sleeve. When the frame body is formed of metal, the engaging portion may be a means to be attached to the sleeve by pressure bonding, screwing and fixing, or a detachable means.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. In FIG. 1, as in the conventional case, the end of the deformed reinforcing bar 5 is inserted into the pipe-shaped connecting sleeve (joint) 4 at both ends from the opening, and a grout inlet 41 is provided at the center of the connecting sleeve. Then, the grout 6 is injected and filled, and the reinforcing bars 5 are fixed by set screws 8 at both ends, and the reinforcing bars and the grout are integrated. Then, when the grout 6 is injected into the connecting sleeve 4, the cap 1 having the reinforcing bar 5 inserted is fitted to both opening ends of the connecting sleeve so that the grout does not leak out. . The present invention is an improved technique for this cap.
[0015]
Therefore, the cap 1 will be described in detail. In FIGS. 2A to 2C, the cap is composed of a frame body 2 and a seal member 3, and this frame body ensures strength to withstand internal pressure. For this reason, a hard material, for example, a metal such as iron, is used as a material, and the outer shape is substantially ring-shaped, and the fitting portion 21 and the front frame 22 are integrally formed. The fitting portion 21 can be fitted to the outer periphery of the end portion of the sleeve 4, and a large-diameter hole portion 22 a is formed on the front surface of the front frame 22. On the inner peripheral surface of the fitting portion 21 of the frame body 2, there are a plurality of locking portions (caulking portions) 21 a that can be attached to and detached from the sleeve 4 with an equiangular displacement, and project at six locations in the drawing.
[0016]
Next, the seal member 3 will be described. This is a highly stretchable material, for example, a plate-shaped raw rubber, which is press-molded with a punch. Department 32 is established. Furthermore, two air vent holes 33 and 33 are formed on the outer peripheral portion of the plate-like main body 31 of the seal member 3.
[0017]
The outer peripheral portion of the plate-like main body 31 of the seal member 3 is in contact with and bonded to the inner surface of the front frame 22 of the frame body 2.
[0018]
Next, the use of the cap 1 according to the present invention will be described. When the cap is rotated by 10 degrees in accordance with both open ends of the sleeve 4, the locking portion 21a becomes an enlarged portion of the outer peripheral end of the sleeve. Engage, and the state shown in FIG. Therefore, the end of the reinforcing bar 5 is inserted through the hole 32 of the seal portion 3 by a predetermined dimension. At this time, since the seal portion 3 is a raw rubber having elasticity, it easily deforms, so that the reinforcing bars 5 and 5 can be easily inserted. Further, if the hole diameter of the hole 32 of the seal portion 3 is about 17 mm, for example, even if the diameter of the reinforcing bar 5 is 19 mm or 22 mm, for example, the elastic deformation of this hole is performed. Since the amount is large, it can be inserted sufficiently and can be accommodated by adjusting the strength of the hole diameter. That is, it is possible to deal with a rebar with a diameter difference of one. Further, since the plate-like main body 31 of the seal portion 3 and the hole portion 32 thereof can be easily formed by punching means of a press machine, the hole portions 32 having other hole diameters can be easily formed. Compared with the conventional injection molding using a cap mold, the manufacturing equipment is simple and the manufacturing cost is reduced.
[0019]
Therefore, the grout 6 is injected from the grout inlet 41 and filled. The pressure due to this injection acts as a stress on the cap 1, but the fitting portion 21 is formed of metal and can sufficiently withstand this pressure. When the grout 6 is filled in the connecting sleeve 4, the air in the sleeve is automatically extracted from the air vent holes 33, 33 of the seal member 3, and the grout is filled in the sleeve without any gap. . This is particularly noticeable in the case of the sleeve 4 that connects the reinforcing bars 5 and 5 in the vertical direction. Further, when connecting the reinforcing bars 5 and 5 in the horizontal direction, as shown in FIG. 2 (C), the air vent holes 33 and 33 are formed so as to be offset toward the outer periphery of the seal member 3, If the frame body 2 is attached to the open end of the sleeve 4 so that the through hole is located above, air can be vented more efficiently.
[0020]
【The invention's effect】
In the present invention, the frame can be securely attached to the connecting sleeve, the grout can be prevented from leaking, the end of the reinforcing bar can be easily inserted, and the reinforcing member can be applied to a reinforcing bar having a diameter difference of about one. Forming can be done easily by punching, and the hole diameter of the hole can be changed easily by punching so that it can accommodate multiple types of rebar diameter, and the metal frame can be cemented even if it is in the structure. And no border cutting occurs. Further, since the air vent hole is provided in the seal member, the air vent hole provided in the conventional sleeve becomes unnecessary.
[Brief description of the drawings]
FIG. 1A is a front view showing a state where a cap is attached to a sleeve, FIG. 1B is a plan view of FIG. 1A, and FIG. 1C is a bottom view of FIG. .
2A is an enlarged plan view of a cap, FIG. 2B is a partially cutaway enlarged cross-sectional view of the cap, and FIG. 2C is an enlarged bottom view of the cap.
3A is a partially cutaway sectional view showing a conventional example, and FIG. 3B is an enlarged sectional view of a cap.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cap 2 Frame 21 Fitting part 21a Locking part 22 Front frame 22a Large diameter hole part 3 Seal member 31 Plate-shaped main body 32 Hole part 33 Air vent through hole 4 Connecting sleeve 5 Reinforcing bar 6 Grout

Claims (5)

It consists of a frame and a seal member,
The frame is a ring made of a hard material, and is formed with a fitting portion that can be fitted to an end of a sleeve for connecting reinforcing bars and a front frame in which a large-diameter hole is formed,
The seal member is composed of a plate-like main body made of a material having stretchability and a hole for inserting a reinforcing bar opened in the plate-like main body.
The outer peripheral part of the said sealing member is contact | abutting to the inner surface of the said front frame of the said frame, The seal cap of the grout joint characterized by the above-mentioned. 2. A grout joint seal cap according to claim 1, wherein the seal member is formed with air vent holes. The grout joint seal cap according to claim 1, wherein the hard material of the frame is metal. The seal cap for a grout joint according to claim 1, wherein the material having expansion / contraction performance of the seal member is raw rubber. The grout joint seal cap according to claim 1, wherein the fitting portion of the frame is formed with a locking portion to be attached to the sleeve.

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