JPH0346112Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a check valve device used for injecting fluids, and more specifically, to a check valve device used for injecting a liquid repair material into a crack when a crack occurs in a concrete structure. .

[Conventional technology]

For example, when repairing cracks that have occurred in a concrete structure, as shown in FIG. After fixing the sheet 11 onto the crack 13 via the holding frame 10, a liquid repair material is supplied to the crack side through the injection plug 12, and the repair is performed by the contraction force of the sheet 11 expanded when the repair material is injected. It is known to press material into the crack 13. In this case, the injection plug 12 is provided on the inner surface side of the seat 11, and when the supply of repair material is completed, the slit 12a provided in the injection plug 12 is brought into close contact with the inner pressure, and functions like a so-called check valve. Demonstrate.

[Problem that the invention attempts to solve]

If the injection plug is provided on the inner side of the seat,
The operation of inserting the nozzle (needle-like) of the injection gun used for injecting the repair material into the slit of the injection stopper must be done by pinching the sheet, which causes the injection stopper to move and become unstable. There is a problem that the work cannot be done easily and quickly.

[Means to solve the problem]

This invention solves the above problems, and
The purpose of this is to provide an injection stopper that protrudes from the top side of the seat, and by grasping the protruding part of the injection stopper, it is possible to quickly attach the nozzle of the injection gun to the injection stopper, and at the same time, it is possible to quickly insert the nozzle of the injection gun into the stopper. An object of the present invention is to provide a check valve device that is improved so as to further enhance its functional functions. Therefore, the above-mentioned object of the present invention is to provide a trabecular injection plug projecting from the upper surface of a freely expandable rubber sheet integrally with the sheet. This is achieved by a check valve device having a slit extending through the lower surface and a notch cut from the lower surface of the seat so as to cover the lower half of the slit.

【Example】

Embodiments of the present invention will be described below with reference to the accompanying drawings. In FIGS. 1 and 2, a frame plate 1 is formed by making a window hole 2 in a rigid plate such as a metal plate.
A rubber sheet 3 that can be expanded and contracted is stretched over the area. The sheet 3 is formed into a substantially elliptical shape with a major axis of 4 to 5 cm and a minor axis of 2 to 3 cm. On the sheet 3, a small cylindrical injection plug 4 is placed integrally with the sheet 3, and is positioned on the upper surface portion 3a side that becomes the surface when the sheet 3 is applied to a portion to be injected, such as a crack described later. is provided protrudingly on the injection plug 4, and is positioned on the central axis of the injection plug 4 to form a top surface 4a of the injection plug 4.
A slit 5 is provided extending from the bottom surface 3b of the sheet 3 to the bottom surface 3b of the sheet 3.
A circular (or square) cut 6 is formed so that it can be cut from the bottom and surround the lower half of the slit 5.
is provided. It is preferable that the slits 5 have a width of about 1 to 3 mm, and the notches 6 have a gap of about 0 to 2 mm. Note that the slit 5 may be formed into a circular hole with a small diameter on its upper half side. According to the above structure, when repairing a crack, for example, the sheet 3 is placed on the opening of the crack with the injection plug 4 side facing upward, and temporarily fixed.
The repair material can be injected by sticking the nozzle of the injection gun into the slit 5. Although the sheet 3 expands due to the injection of the repair material, the opening of the slit 5 due to this expansion is blocked by the notch 6, and the internal pressure causes the bottom of the slit 5 surrounded by the notch 6 to expand. The half side receives a strong pressing force, and the lower half side is urged to be in close contact. Therefore, the internal pressure necessary for press-fitting the repair material into the crack can be sufficiently maintained by the contraction force of the expanded sheet 3.

[Effect of the idea]

The present invention is as described above, and when injection material such as repair material used for crack repair is injected, the sheet is expanded, and the slit of the injection plug can be brought into close contact with the inner pressure acting on the sheet. Therefore, it is possible to completely prevent leakage of the injection material, maintain the internal pressure necessary for press-fitting the injection material, and perform injection work rationally. In addition, the operation of sticking the injection gun to the injection stopper has the advantage of being able to quickly grasp the injection stopper protruding from the sheet, keeping the injection stopper stable, and using the contractile force of the sheet to insert the injection material. Its practical value is extremely great, as it can be widely applied to the field of press-fitting.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line A--A in FIG. 1, and FIG. 3 is a sectional view showing an example of use of the conventional device. In the figure, 3 is a sheet, 3a is a top surface, 3b is a bottom surface, 4 is an injection plug, 4a is a top surface, 5 is a slit,
6 is the notch.

Claims (1)

[Scope of utility model registration request] A cylindrical injection plug is integrally provided on the upper surface of the expandable rubber sheet, and the injection plug has a slit extending from the top of the injection plug to the lower surface of the sheet. , and a check valve device comprising a notch cut from the lower surface of the seat so as to extend around the lower half of the slit.