JPH0442361Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an embedded anchor, and particularly to an auxiliary tool for fixing an embedded anchor, which is fixed to a mounting hole formed in a base using an adhesive.

[Conventional technology]

A bottomed mounting hole with a diameter that is approximately the same as or slightly larger than that of the embedded anchor is formed in the existing concrete base, and a polyester or epoxy based material is used in the gap between the embedded anchor inserted into this mounting hole and the mounting hole. Techniques for fixing embedded anchors by filling synthetic resins such as in a fluid state and curing them have been known for a long time.

Compared to so-called mechanical anchors, in which the tip of the anchor inserted into the mounting hole is mechanically expanded and fixed, this technology has a uniform pull-out strength and can obtain superior anchoring power. It has many advantages, such as being able to be used on bases made of soft cellular concrete, etc., and being easy to install in narrow areas such as corners and corners.

[Problem that the invention attempts to solve]

However, when installing an embedded anchor long enough to provide sufficient pull-out strength on a thin foundation with a hollow space inside, such as a lightweight block made of cellular concrete, etc. , the mounting hole formed in the base rock penetrates into the empty space, making it difficult to hold the embedded anchor when fixing it, and the resin filled in the gap between the mounting hole and the embedded anchor penetrates into the empty space. This makes fixation difficult or impossible.

Therefore, if you dare to fix it in such a place, you will need to form a shallow mounting hole that does not penetrate into the empty space and fix a short embedded anchor in this hole, which means that the mounting hole and embedded anchor will be connected through the resin. Since the contact area, that is, the adhesion area is reduced, sufficient pull-out strength cannot be ensured.

The present invention was developed in view of these circumstances, and it is an embedded anchor that is long enough to provide sufficient pull-out strength to a base that is thin and has a hollow space at the rear. This invention was devised with the aim of providing an auxiliary tool for fixing an embedded anchor that can be used to fix an embedded anchor.

[Means for solving problems]

In order to achieve the above object, the present invention has at least one perforated cylindrical part having a large number of through holes communicating between the inside and outside and at least one non-perforated cylindrical part that blocks the inside and outside, which are arranged alternately in the axial direction. It is characterized by being formed into a cylindrical shape with a diameter larger than that of the embedded anchor and smaller than the mounting hole.

[Effect]

Using the perforated cylindrical part as a base, the non-perforated cylindrical part is aligned with the hollow part and inserted into the mounting hole, and the embedded anchor is inserted into the inside thereof and filled with resin. The filled resin is prevented from flowing into the cavity by the non-porous cylindrical part that blocks the inside and outside, and also adheres the internal embedded anchor and the mounting hole to each other through the numerous through holes formed in the perforated cylindrical part. .

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

1 and 2 show an embodiment of the fixing aid for an embedded anchor according to the present invention, and the fixing aid designated by reference numeral 1 has, for example, a through hole 17 with a hole diameter of about 1 mm. A perforated cylindrical part 3 formed by the metal rope 2 and having a diameter larger than the embedded anchor to be used and a smaller diameter than the mounting hole, and a perforated cylindrical part 3 having the same shape as the perforated cylinder part 3 and made of polyvinyl chloride or the like with the metal rope 2 as a core material. A non-porous cylindrical portion 6 having a circumferential wall 4 and a bottom wall 5 made of thermoplastic resin is axially connected to form a cylindrical shape. Furthermore, a collar 7 made of synthetic resin such as polyvinyl chloride is provided protruding from the open end 3a of the perforated cylindrical portion 3. Note that the length of the perforated cylinder portion 3 is set depending on the thickness of the base to which it is attached.

The fixing aid 1 having such a configuration is, for example, a third
As shown in the figure, a metal rope 2 having a predetermined width and length is wound into a cylindrical shape with a predetermined diameter, and then a fourth
As shown in the figure, one end 2a of the end 2a is inserted into a bottomed female mold 8 having an inner diameter slightly larger than that, and a rod-shaped male mold 9 with a slightly smaller diameter is inserted inside the female mold 8. By injecting or injecting a required amount of molten resin 10 between the male die 9 and the hole in the wire 2, a non-porous cylindrical portion 6 of a predetermined length is formed. Alternatively, as shown in FIG. 5, for example, a bottomed cylindrical body 11 having a predetermined diameter and a predetermined length is formed in advance from thermoplastic resin, and one side of the metal rope 2 is wound around the thermoplastic resin to form a cylindrical shape. After the end 2a is inserted, a heated mold is brought into contact with the cylindrical body 11 to thermally shrink the cylindrical body 11 and attach it to the metal rope 2, thereby forming the non-porous cylindrical portion 6. Note that the collar 7 provided on the end 3a of the perforated cylinder part 3 is also attached by the same means used to form the non-perforated cylinder part 6, but these may be formed by any suitable means other than the above. be able to.

Next, a method for fixing an embedded anchor using the fixing aid 1 of this embodiment will be explained.

6 to 9 show a method of fixing an embedded anchor to a base 13 made of aerated concrete and having a hollow part 12. First, as shown in FIG. A mounting hole 14 penetrating from the hole 13a into the hollow portion 12 is formed, and then, as shown in FIG. 7, the fixing aid 1 is inserted into the mounting hole 14 from the non-porous cylindrical portion 6. At this time, the fixing aid 1 is in a state in which the perforated cylinder part 3 is located in the mounting hole 14 part and the non-perforated cylinder part 6 is located in the hollow part 12, without the collar 7 coming into contact with the surface 13a and being recessed. is maintained. As shown in Figure 8, conventionally commonly used resins, curing agents,
The capsule 15 containing aggregate etc. is inserted into the fixing aid 1, and the embedded anchor 16 attached to a driving tool such as a hammer drill is inserted into the fixing aid 1 while rotating, and the capsule 15 is destroyed. At the same time, the resin, hardening agent, etc. inside are mixed. At this time, the attachment hole 14 penetrating into the hollow part 12 is almost blocked from the hollow part 12 by the non-porous cylindrical part 6 which has a bottom wall 5 and blocks the inside and outside, and the mixture flows out into the hollow part 12. As shown in FIG. 9, the fixing device is cured with the embedded anchor 16 inserted inside the fixing aid 1. In addition, the mixture 15a passes through a large number of through holes 17 that communicate between the inside and outside of the perforated cylindrical portion 3, adheres to the wall surface of the attachment hole 14, hardens, and fixes the embedded anchor 1.
6. The perforated cylinder portion 3 and the mounting hole 14 are fixed to each other.

According to this embodiment, the mixture 15a integrally fixes the embedded anchor 16, the fixing aid 1, and the mounting hole 14, and the embedded anchor 16 and the fixing aid 1 are attached to the base 13. , that is, longer than the length of the attachment hole 14, it is possible to exhibit greater pull-out strength than when fixed by a conventional method using a short embedded anchor. Furthermore, use a hammer drill etc. to remove capsule 15.
Embedded anchor 1 when destroying and mixing stored items.
Even if the fixing device 6 shakes laterally, the wall of the attachment hole 14 will not be damaged because it is surrounded by the fixing aid 1. In particular, when a capsule 15 containing aggregate or a capsule 15 made of a glass container is used, by forming a through hole 17 in the perforated cylindrical portion 3 with a diameter smaller than that of the aggregate or the glass fragments produced by destruction. It is possible to prevent the hole wall from being destroyed by aggregate, etc., and the effect of preventing the attachment hole 14 from collapsing can be improved.

FIG. 10 shows another embodiment of the present invention, which has a structure having perforated cylindrical parts 3b and 3c of a predetermined length at both ends and a non-perforated cylindrical part 6 of a predetermined length between them. be. Fixing aid 1 of this example
As shown in FIG. 11, the embedded anchor 16 can be fixed in a state where the hollow part 12 is sandwiched between the base part 13b on the proximal end and the base part 13c on the distal end. In this case as well, the mixture inside the fixing aid 1 is passed through the non-porous cylindrical part 6 that blocks the inside and outside.
This prevents leakage into the hollow part 12, and the base part 1
The perforated cylinder portions 3b, 3c located at 3b, 13c
The embedded anchor 16 is fixed by passing through and adhering to the attachment holes 14b, 14c and hardening.

In this embodiment, the perforated cylindrical parts 3b and 3c are provided in two places, and the embedded anchor 16 is fixed to the base parts 13b and 13c by sandwiching the hollow part 12, so that even greater pull-out strength can be obtained. can. still,
This example can also be manufactured by substantially the same means as the previous example.

FIG. 12 shows still another embodiment of the present invention, in which the whole is made of a thin metal plate, and the perforated cylinder parts 3b and 3c have a large number of through holes 17 formed by punching. There is. The fixing aid 1 of this embodiment is, for example, as shown in FIG. 13, by cutting a thin metal plate 18 into a predetermined shape, forming a large number of through holes 17 at predetermined positions, and forming this into a cylindrical shape. However, if necessary, a synthetic resin bottom member can be attached and manufactured. The structure of this embodiment is easy to manufacture, especially one that does not require a bottom member.

[Effect of idea]

According to the present invention, even if the base is thin and has a hollow space at the rear, it is possible to fix the embedded anchor with sufficient pull-out resistance, and when driving the embedded anchor. In order to prevent damage to the mounting hole due to impact, the embedded anchor can be easily fixed to a base such as a soft cellular concrete block.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing one embodiment of the present invention;
The figure is a sectional view taken along the line A-A in FIG. 1, FIGS. 3, 4, and 5 are explanatory diagrams showing the manufacturing method of the embodiment shown in FIGS. 1 and 2, and FIG. , FIG. 7, FIG. 8, and FIG. 9 are explanatory diagrams showing how to use the same, FIG. 10 is a perspective view showing another embodiment of the present invention, and FIG. 11 is an explanatory diagram showing the state of use.
FIG. 12 is a perspective view showing still another embodiment of the present invention, and FIG. 13 is a developed view thereof. DESCRIPTION OF SYMBOLS 1... Auxiliary tool for fixing, 3... 3b, 3c perforated cylindrical part, 6... Non-perforated cylindrical part, 17... Through hole.

Claims (1)

[Scope of utility model registration request] At least one perforated cylindrical part 3 having a large number of through holes 17 that communicate between the inside and outside and at least one non-perforated cylindrical part 6 that blocks the inside and outside are alternately arranged in the axial direction, and are larger than the embedded anchor 16. Mounting hole 14 in diameter
An auxiliary tool for fixing an embedded anchor, characterized in that it is formed into a cylindrical shape with a smaller diameter.