JPH0347078Y2 - - Google Patents

Description

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

The present invention relates to a fluid injector used for injecting a repair material into cracks that occur in concrete structures.

[Conventional technology]

For example, when repairing cracks that have occurred in a concrete structure, a rubber sheet 2 attached to a holding frame 1 made of a metal plate is used as shown in FIG.
After the rubber sheet 2 is placed on the crack 4 through the holding frame 1, liquid repair material is supplied to the crack 4 side through the injection plug 3, and the rubber expanded when the repair material is injected. An injection tool is used which can press the repair material into the crack 4 by the contraction force of the sheet 2. In this case, when the supply of the repair material is completed, the slit 3a provided in the injection plug 3 is brought into close contact with the slit 3a due to internal pressure, and functions as a so-called check valve.

[Problem that the invention attempts to solve]

When manufacturing the above-mentioned injection device, it is necessary to firmly adhere the rubber sheet to the opening of the holding frame in a stretched state. It is not easy to bond the metal plate and the rubber sheet, and they are often manufactured with incomplete adhesion. If an injection tool with incomplete adhesion is used, the tension generated when the rubber sheet expands will damage the seal at the bonded area, causing a problem in which the repair material may easily leak. Further, since the rubber sheet is stretched over the opening of the flat holding frame, there is a problem in that it is easily damaged by coming into contact with other objects.

[Means to solve the problem]

This invention solves the above problems, and
Its purpose is to allow the rubber sheet to be attached to the holding frame without gluing it, to ensure a seal between the holding frame and the rubber sheet, and to protect the rubber sheet by keeping the rubber sheet housed within the holding frame at all times. An object of the present invention is to provide a fluid injection device that is effective for Therefore, the above-mentioned object of the present invention is to provide an outer frame body having a bottom portion and a peripheral wall portion, a ring-shaped inner frame body inscribed in and fitted to this outer frame body, and a combination of this inner frame body and the above-mentioned outer frame body. A rubber sheet is installed in between, and locking claws provided at intervals on the peripheral wall of the outer frame are locked to engagement steps provided on the outer peripheral surface of the inner frame, and is provided with an opening, and an endless protruding strip is provided on the bottom of the bottom near the peripheral wall along the circumferential wall, while an inner frame has an opening between the protruding strip and the protruding strip. An inner circumferential wall portion for clamping the rubber sheet is provided protruding toward the bottom of the outer frame body, and an endless seal protrusion is provided on the rubber sheet in correspondence with the above-mentioned protrusion, and an inner side of the seal protrusion is provided on the rubber sheet. This is achieved by a fluid injector configured by protruding injection plugs located at the respective sides.

【Example】

Outer frame body 10 which is one member constituting the holding frame
is a plastic molded product having a bottom part 11 and a peripheral wall part 12, and an opening 13 is bored in the center part of the bottom part 11, and an opening 13 is bored in the part of the bottom part 11 close to the peripheral wall part 12. A protruding strip 14 is protruded endlessly along the peripheral wall portion 12, and an inner circumferential surface 14a of the protruding strip 14 is formed as an inwardly inclined surface. A plurality (3 to 8) of locking claws 15 formed by cutting from the upper edge 12a side are provided at equal intervals on the peripheral wall portion 12, and the upper part of each locking claw 15 is hooked inward. It is formed in the portion 15a. Further, the inner frame body 20, which is the other member constituting the holding frame, is a molded product like the outer frame body 10, and has a size that allows it to be inscribed and fitted into the outer frame body 10. It is formed into a ring shape. The inner circumferential wall portion 21 provided on the inner frame body 20 has a tip end 21a that is connected to the outer frame body 10.
The inner frame body 2
The outer circumferential surface portion 22 of 0 is provided with an engagement step portion 24 cut off from the upper surface 23 side and formed into a concave shape in correspondence with the hook portion 15a. A rubber sheet 30 is installed between the fitted outer frame body 10 and inner frame body 20, and on this rubber sheet 30, an endless seal convex shape 31 is provided in correspondence with the convex strip 14, Short column-shaped injection plugs 32 are protruded from inside the seal protrusions 31, respectively. The rubber sheet 30 has an outer frame body 10 and an inner frame body 2.
0 is fitted and the hook portion 15a of the locking pawl 15 is locked to the engagement step portion 24, the inner peripheral wall portion 21 of the inner frame body 20
It is designed to be clamped between the protrusions 14 of the outer frame 10 and crimped onto the bottom 11. The injection plug 32 has a slit 33 extending from the top surface 32a to the bottom surface 32b facing the back surface of the rubber sheet 30.
A notch 34 is formed from b to surround the lower half of the slit 33. Therefore, the inner frame 20 may have a shape in which the hem 22a on the side of the outer peripheral surface 22 is cut off, and the rubber sheet 30 may have a shape in which the peripheral edge portion is cut off, leaving the seal protrusion 31. can. According to the above configuration, when this injection tool is used for repairing a crack, for example, the outer frame 10 is temporarily fixed to the part where the crack has occurred with the opening 13 facing the crack, and the repair material is passed through the injection plug 32. can be injected into the crack. Therefore, when the repair material is supplied from the injection plug 32, the third
As shown in the figure, the rubber sheet 30 expands greatly, and due to this expansion, the rubber sheet 30 is pulled inward, and the seal protrusion 31 is moved between the protrusion 14 and the inner peripheral wall portion 2.
Since the holding frame and the rubber sheet 30 are urged to bite slightly toward the inclined gap between the holding frame and the rubber sheet 30, the seal between the holding frame and the rubber sheet 30 becomes even stronger, and the leakage of the repair material can be completely prevented.

[Effect of the idea]

The present invention is as described above, in which the holding frame is formed by an outer frame body and an inner frame body that can be freely fitted and removed, and a rubber sheet is inserted between both frame bodies, so that a pressing force is applied when fitting the holding frame. Since the rubber sheet is crimped, the seal is achieved without gluing the rubber sheet, and when the rubber sheet expands, the seal becomes even stronger.
Leakage of injection material can be completely prevented. In addition, the rubber sheet is normally flattened and housed within the outer frame, which has the advantage of being handled in such a way that there is no need to worry about it coming into contact with other objects, thereby preventing damage.

[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, Fig. 3 is a sectional view of the rubber sheet in an expanded state, and Fig. 4 is a conventionally known It is a sectional view showing an example of use of the injection device. In the figure, 10 is an outer frame, 11 is a bottom, 12 is a peripheral wall, 13 is an opening, 14 is a protrusion, 14a is an inner peripheral surface,
15 is a locking claw, 20 is an inner frame body, 21 is an inner peripheral wall portion, 21a is a tip portion, 22 is an outer peripheral surface portion, 24 is an engaging step portion, 30 is a rubber sheet, 31 is a seal protrusion,
32 is an injection plug.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An outer frame body having a bottom portion and a peripheral wall portion, a ring-shaped inner frame body inscribed and fitted into this outer frame body, this inner frame body and the above-mentioned outer frame body. The locking pawls provided at intervals on the peripheral wall of the outer frame are locked to the engagement steps provided on the outer peripheral surface of the inner frame. An opening is bored in the bottom, and an endless protruding strip is provided on the bottom of the bottom close to the peripheral wall along the circumferential wall, while the inner frame is provided with an endless protruding strip along the circumferential wall. An inner circumferential wall portion between which a rubber sheet is clamped is provided protruding toward the bottom of the outer frame body, and an endless seal protrusion is formed on the rubber sheet in correspondence with the above-mentioned protrusion. 1. A fluid injection device characterized by comprising injection plugs protruding from the inside of the fluid injection device. (2) The scope of the above-mentioned utility model registration claim characterized in that the inner peripheral wall of the inner frame and the inner peripheral surface of the convex strip of the outer frame facing the inner peripheral wall are inclined inward. Fluid injection device described in (1). (3) Claim No. 1 of the above-mentioned utility model registration, characterized in that the inner circumferential wall portion of the inner frame body is protruded so that a rubber sheet is crimped between the tip end thereof and the bottom portion of the outer frame body. Fluid injection device described in ).