JPH0534256U - Check valve for adhesive injection device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] In a check valve of a tubular body consisting of a large diameter portion and a small diameter portion of an adhesive injection device, facilitate valve deformation and prevent deterioration of valve sealing performance. The purpose is to A cylindrical inner peripheral wall 6 and a cylindrical outer peripheral wall 2 are evenly connected by a plurality of columns 8 that are slanted from the inner peripheral wall toward the other end of the outer peripheral wall, and the lid 5 is caused by the pressure applied to the top plate 4. The backup material 11 that makes it easy to deform and move and that has an inversion prevention portion prevents the lid portion 5 from overextending and inversion.
It features a structure that makes it easy to return to the original state by the pressure from the inside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a check valve for an adhesive injection device used in an adhesive injection method suitable for repairing cracks in a structure.

[0002]

[Prior Art]

 As a method for repairing cracks in structures made of concrete, stone, etc., recently, when the adhesive is injected into the injected body, the adhesive injection pressure applied to the injected body is pooled in the adhesive reservoir. An adhesive injection method (Japanese Patent Publication No. 63-8154) is proposed, in which the adhesive is pooled and is poured into the injection target body by the continuous change of the adhesive, and then the backflow prevention device used in this method is proposed. An adhesive material injection device (Japanese Patent Publication No. 64-7189) has been proposed.

After that, various improvements were made to the check valve of the adhesive injection device, and some proposals were made. For example, a check valve (a gazette of Japanese Utility Model Laid-Open No. 60-108652) made of a cylindrical flexible material having one end closed by a top plate and an opening in the peripheral wall, an opening / closing lid supported by the peripheral wall at one point. There is a check valve (Japanese Utility Model Laid-Open No. Sho 63-44200) made of a flexible material having the above.

The former is a cylindrical check valve whose one end is closed by a top plate and has an opening in the peripheral wall. Therefore, the top plate is pressed and deformed, and the pipe line is opened from the opening in the peripheral wall. In the open state, the adhesive is encapsulated in the adhesive reservoir, and the pressure from the adhesive in the adhesive reservoir corrects the deformation to close the pipeline.The latter is when the opening / closing lid is pressed. By changing the fulcrum, the pipeline is opened and the pipeline is closed in almost the same way as the former.

However, these proposals also have some disadvantages. In the former case, the injection pressure of the adhesive material causes the deformation of the valve itself, so the injection pressure must be increased, which affects the workability when injecting the adhesive material with a hand gun, etc. If the supporting part, which is the movable part of the opening / closing lid, is deformed or stretched too much due to the pressure when forming the passage, the opening / closing lid will not return to the predetermined position when closing the pipeline, and the internal pressure will be small. If this happens, the situation may occur in which the sealing performance deteriorates.

[0006]

[Problems to be solved by the device]

 The present invention solves the above drawbacks and provides a non-return valve for an adhesive injection device that facilitates the deformation movement of the valve forming the conduit and facilitates the closed state of the conduit.

[0007]

[Means for Solving the Problems]

 The above-mentioned drawback is that a cylindrical inner peripheral wall closed at one end by an annular close contact portion on the inside of the cylindrical outer peripheral wall, and preferably a convex annular close contact portion and a lid protruding to the outside A space is provided between the inner surface of the cylindrical outer peripheral wall and the outer surface of the cylindrical inner peripheral wall, and the ring-shaped close contact portion of the inner peripheral wall lid is positioned outside one end of the cylindrical outer peripheral wall. A cylindrical backup material having a space and a stopper at the other end of the cylindrical outer peripheral wall, as well as connecting the cylindrical inner peripheral wall and the cylindrical inner peripheral wall at a plurality of points by means of columns that are slanted from the inner peripheral wall toward the other end of the outer peripheral wall. A solution is provided by providing an adhesive injection device with a positioned.

[0008]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a plan view of the check valve, FIG. 2 is a sectional view taken along the line AA of FIG. 1, FIG. 3 is a plan view of a backup material for preventing reversal of the check valve, and FIG. 4 is B of FIG. -B cross-sectional view, FIG. 5 is an explanatory view showing a state in which a check valve is attached to a stepped portion of a tubular body consisting of a small diameter portion and a small diameter portion. FIG. 6 and FIG. It is an example figure.

1 and 2, the valve portion 1 is made of a flexible material such as synthetic resin or rubber as follows. The valve portion 1 is an annular ring that is in close contact with a stepped portion d formed by a cylindrical outer peripheral wall 2 that is in close contact with the inner surface of the large diameter portion b of the pipe body a, and a large diameter portion b and a small diameter portion c of the pipe body a It is composed of a cylindrical inner peripheral wall 6 closed by a lid part 5 composed of a close contact part 3 and a top plate 4 protruding outward.

The cylindrical outer peripheral wall 2 and the cylindrical inner peripheral wall 6 are arranged such that the cylindrical inner peripheral wall 6 is located inside the cylindrical outer peripheral wall 2 with a space 7 and the annular close contact portion 3 of the lid portion 5 is cylindrical. The outer peripheral wall 2 is positioned outside one end, and the cylindrical outer peripheral wall 2 and the cylindrical inner peripheral wall 6 are slanted from the inner peripheral wall 6 toward the other end of the outer peripheral wall 2 so that four positions are balanced. Well connected and integrated.

The outer surface of the cylindrical outer peripheral wall 2 has a diameter close to the inner surface of the large-diameter portion b of the tubular body a 1 including the small-diameter portion c and the large-diameter portion b. 3 is formed according to the thickness of the tubular body a so as to be in close contact with the step portion d which is the boundary between the large diameter portion b and the small diameter portion c of the tubular body.

The backup material 11 is cylindrical and has an outer diameter that comes into close contact with the inner surface of the large-diameter portion b of the tubular body a, and is composed of a reversal prevention portion 13 and a space 14 that are bridged inside the peripheral wall 12. ing. Reference numeral 15 is a fitting / stopping portion.

As shown in FIG. 5, the valve portion 1 and the backup material 11 thus formed are fitted and integrated into each other through the end openings of the cylindrical outer peripheral wall 2 of the valve portion 1 and have a large inner diameter. The outer surface of the cylindrical outer peripheral wall 2 is fitted onto the inner surface of the large diameter portion b at the step portion d which is a boundary of the tubular body a composed of the diameter portion b and the small diameter portion c having a small inner diameter, and they are brought into close contact with each other by adhesion or the like. The ring-shaped close contact portion 3 of the lid portion 5 is brought into close contact with the step portion d, and the top plate 4 is positioned so as to project toward the small diameter portion c. e is a tube as an adhesive reservoir made of an elastic body.

FIGS. 6 and 7 show an embodiment of the ring-shaped close contact portion 3. FIG. 6 shows a pipe in which the ring-shaped close contact portion 3 is formed solid and has a large diameter portion b and a small diameter portion c. FIG. 7 shows the state of being in close contact with the step portion d which is the boundary of the body a, and FIG. 7 shows the portion of FIG. 5, in which the annular close contact portion 3 is formed in a convex shape, and has a large diameter portion b and a small diameter portion c. It shows a state in which it is in close contact with the step portion d which is the boundary of the tubular body a consisting of.

[0015]

[Action]

 Since the present invention is constructed in this manner, it has the following effects. First, when the top plate 4 is pressed from the small diameter portion c of the pipe body a, the top plate 4 is deformed and moved to the large diameter portion b, and a gap is formed between the step portion d and the annular close contact portion 3 to form a pipe line. To do. At this time, since there is the reversal prevention portion 13 of the back-up material 11, the back-up material 11 will not be reversed or pressed too much. When the adhesive material pool e expands and the adhesive material reservoir e expands and pressure is applied from the adhesive material reservoir e, the adhesive material reservoir e returns to its original state and closes the pipeline.

[0016]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. In Claims 1 and 2, the cylindrical outer peripheral wall of the valve portion and the cylindrical inner peripheral wall located inside thereof are connected by a column slanted from the inner peripheral wall toward the other end of the outer peripheral wall. When pressure is applied to the top plate of the tube, the lid part easily deforms and moves to form a duct between the large diameter part and the small diameter part of the pipe body, and the backup material is located at the opening end of the valve part. Since the lid does not reverse, separate, or extend too much, it is easy to return to its original state due to the pressure from the adhesive reservoir, and completes the seal between the large diameter part and the small diameter part of the pipe body. ..

In the second aspect, since the annular close contact portion is formed in a convex shape, compared to the case where the annular close contact portion is formed as a solid, the contact area is small and the surface pressure increases, so that the sealing performance is improved. improves.

[Brief description of drawings]

FIG. 1 is a plan view of a valve portion of a check valve.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view of a backup material for preventing reversal of the valve portion of the check valve.

4 is a sectional view taken along line BB of FIG.

FIG. 5 is an explanatory diagram showing a state in which a check valve is attached to a stepped portion of a tubular body including a small diameter portion and a small diameter portion.

FIG. 6 is a diagram showing an embodiment of a ring-shaped close contact portion.

FIG. 7 is a view showing an embodiment of a ring-shaped close contact portion.

[Explanation of symbols]

 1 Valve part 2 Cylindrical outer peripheral wall 3 Circular annular close contact part 4 Top plate 5 Lid part 6 Cylindrical inner peripheral wall 7 Space 8 Strut 11 Backup material 12 Circumferential wall 13 Inversion prevention part 14 Space

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] March 30, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takuzo Tamura 1-28-4 Miiri, Asakita-ku, Hiroshima City (72) Mitsuzo Sumitani 1-12-19 Nishihara, Asanan-ku, Hiroshima City

Claims (2)

[Scope of utility model registration request] 1. An inner surface of a cylindrical outer peripheral wall and a cylindrical inner peripheral wall closed at one end by a lid portion composed of an annular close contact portion and a top plate protruding outward. A space is provided between the outer peripheral surface of the cylindrical inner peripheral wall and the annular close contact portion of the lid portion of the cylindrical inner peripheral wall positioned outside one end of the cylindrical outer peripheral wall, and A cylindrical backup material having a space and a reversal preventive portion was located at the other end of the cylindrical outer peripheral wall of the valve portion formed by connecting a plurality of points by a pillar slanted from the peripheral wall toward the other end of the outer peripheral wall. Check valve for adhesive injection device. 2. The check valve for an adhesive injection device according to claim 1, wherein the annular close contact portion of the cylindrical inner peripheral wall is formed in a convex shape.