JPH0424569B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an anchor for attaching various structures to a wall surface and a method for attaching the anchor.

(Prior art) Conventional anchors have an inverted conical wedge at the tip of a rod such as a bolt or round rod, and insert a cylindrical sleeve that is fitted around the rod into a hole in a wall. The structure is such that it is driven into the wedge, expanded, and fixed in the hole by the frictional force. For this reason, it could not be used for walls with small thicknesses, walls with hollow interiors, soft walls such as lightweight concrete, etc.

In addition, for such walls, a method is used to fix the wall by passing a bolt through it and screwing a nut onto the bolt on the back side of the wall, but it is difficult to reach the back side of the wall and it is difficult for workers to enter. This method could not be used if it was not available.

(Objective of the Invention) Therefore, the present invention provides an anchor and its attachment method which can be used on a wall under the above conditions and which can obtain a secure anchor attachment state with simple work.

(Structure of the Invention) The anchor of the present invention includes an anchor body fixed to a wall, and a rod such as a bolt attached to the anchor body, and the anchor body is inserted into a through hole provided in the wall. A cylindrical sleeve to be inserted, an expandable and retractable bag attached to the sleeve and inserted into the through hole together with the sleeve and a part of which is disposed on the back side of the through hole, and a material injected into the bag and hardened. The injection material expands the bag to a diameter larger than that of the through hole.

Further, in the anchor attachment method of the present invention, an expandable bag is attached to a cylindrical sleeve to form an anchor body, and the anchor body is inserted into a through hole provided in a wall with the bag in a contracted state. , and after inserting the bag with the bag positioned on the back side of the wall, a mounting agent is injected into the bag from one end of the sleeve to expand the bag to a larger diameter than the through hole, and bolts etc. By inserting the rod from one end of the sleeve into the adhesive inside the bag and curing the adhesive, the bag is locked to the back of the wall and the anchor body is fixed to the wall. This is to fix the body to the anchor body.

(Example) Embodiments of the present invention will be described with reference to the drawings.

Basic Embodiment (See FIGS. 1 to 4) Reference numeral 1 denotes a cylindrical sleeve, and a bag body 2 is attached to this sleeve 1 to form an anchor body A.
3 is a bolt attached to this anchor body A.

The sleeve 1 is provided with a flange 11 at one end and a female thread 12 on its inner peripheral surface into which the bolt 3 is screwed.

The bag body 2 is made of an elastic material such as rubber and can be expanded and contracted, that is, the inner space expands to take the original bag shape (expanded state) as shown in FIG. 1 and FIGS. As shown, it is formed so that it can be flexibly deformed into a folded and contracted state. Mouth part 21 of this bag body 2
is smaller than the outer diameter of the sleeve 1, and the opening 2 is smaller than the outer diameter of the sleeve 1.
The portions other than 1 are formed to be larger than the outer diameter of the sleeve in the expanded state. The bag body 2 is integrated with the sleeve 1 with the opening 21 elastically fastened to the outer periphery of the sleeve, with the inner cavities communicating with each other as shown in FIGS. 2 and subsequent figures. In this case, in order to strengthen the prevention of the bag body 2 from coming off, the opening part 21 is attached to the flange part of the sleeve 1 as shown in the figure.
It is desirable to cover up to 1.

The method of attaching this anchor to the wall will be explained.

(a) As shown in Figure 2, the sleeve 1 is attached to the wall 4.
A through hole 5 with a diameter equal to the outer diameter of the sleeve 1 plus the thickness of the bag body 2 is bored, and the sleeve 1 is inserted into the through hole 5.
Insert the anchor body A consisting of the and bag body 2,
The flange 11 of the sleeve 1 is brought into contact with the wall surface via the bag opening 21. In this case, if the bag body 2 is shrunk and pushed into the sleeve 1 as shown in the figure, the anchor body A can be easily inserted.

In addition, in order to prevent the sleeve 1 from protruding to the back side of the wall 4 when the anchor body is inserted, the length l of the main body excluding the flange 11 of the sleeve 1 is set to the wall 4.
Set the thickness to be smaller than the thickness S dimension.

(b) Next, time-curable (hardens over time) adhesive 6 as an injection material is injected into the anchor body A using an injection tool (not shown) from the opening on the side of the flange 11 of the sleeve 1, The bag body 2 is expanded by the adhesive 6 to a diameter larger than that of the through hole 5 (the state shown in FIG. 3).

In this case, the inside of the bag body 2 is coated with adhesive 6.
It only needs to be filled with water and expanded, and there is no need to expand it elastically beyond the original expanded state.

(c) After injecting the adhesive, as shown in FIG. 4, screw the tip of the bolt 3 into the sleeve 1 so that the tip reaches inside the bag 2 (inside the adhesive 6 inside the bag 2).

(d) When the adhesive 6 is cured in this state, the bag body 2
is locked to the back side of the wall 4 in an expanded state, and the anchor body A is fixed to the wall 4 with the wall 4 sandwiched between the bag 2 and the sleeve flange 11. Also, at the same time, the bolt 3 is connected to the adhesive force of the adhesive 6 inside the bag body 2 and the sleeve 11.
It is fixed to the anchor body A by the screwing force with the anchor body A.

In this way, the anchor body A to the wall through hole 5
The anchor can be efficiently and securely attached to the wall 4 by the simple operations of inserting the anchor, injecting the adhesive 6, and inserting the bolt 3. Also,
According to this anchor and its installation method, (a) the anchor body A is fixed to the wall 4 by expanding the bag body 2 on the back side of the wall, so it is suitable for thin walls; Because it does not apply any mechanical impact, it can be used even on soft walls such as lightweight concrete. It can be conveniently used on walls where workers cannot reach or enter.

Other embodiments () In the above embodiment, bolt 3 is attached to anchor body A.
Although the bolt 3 has been shown as an example, a threadless bar (round bar, square bar) may be used instead of the bolt 3. In this case, in order to strengthen the adhesive force, it is desirable to form the outer peripheral surface of the tip end 71 of the bar 7 into an uneven shape, as shown in FIG.

() In addition, in FIG. 5, a circumferential groove 13 is provided on the outer peripheral surface of the sleeve 11 as a structure for strengthening the fixing force of the anchor body A to the wall 4, and this circumferential groove 13 and the inner space of the sleeve are shown. On the other hand, a plurality of adhesive outlet holes 22 are provided in the bag opening 21. According to this configuration, the adhesive 6 injected into the anchor body A is applied to the communication hole 14 of the sleeve 11 and the circumferential groove 1.
3. Since the adhesive is led out to the peripheral wall surface of the through hole 5 through the adhesive outlet holes 22 of the bag body 2, the sleeve 1 and the bag body 2 are adhesively fixed to the peripheral wall of the through hole 5 by this adhesive. Become.

() Furthermore, in order to strengthen the prevention of the wall body 2 from coming off from the sleeve 1, as shown in FIG.
A ring-shaped cap 8 may be fitted onto the portion of the sleeve flange 11 that is attached to the sleeve flange 11. Reference numeral 81 denotes a protrusion provided on the inner circumferential surface of the cap 8 to strengthen the cap fitting force.

() The material of the bag body 2 may be any material that can be expanded, contracted, and flexibly deformed so that it shrinks when inserted into the wall through-hole 5 and expands into a bag shape by injecting adhesive. In addition to the elastic material such as rubber shown in the above embodiments, plastic, cloth, leather, etc. can be used. The means for attaching the bag 2 to the sleeve 1 can also be, for example, by placing the opening of the bag over the sleeve and binding it with wire, or by fixing an elastic ring to the opening of the bag and fixing this elastic ring to the sleeve. There are various methods to choose from, such as the means of attachment.

() The method of attaching the anchor of the present invention, that is, the method of fixing it to the wall of the anchor body, and the method of fixing the rod to the anchor body, is by injecting adhesive into the bag body as shown in the above embodiment. The method of fixing the anchor body to the wall and simultaneously fixing the rod to the anchor body using this adhesive is the best method in terms of workability and rod attachment strength, but there are other methods, such as As an injection material, instead of adhesive, a synthetic resin material such as foamed resin is injected into the bag body to expand the bag body, and the rod body (bolt) is fixed by a screwing force to the sleeve. It's good to wear.

(Effects of the Invention) As described above, according to the anchor and the method of attaching the same of the present invention, thin walls and hollow walls,
It can be used on walls where conventional wedge-type anchors cannot be used, such as soft walls such as lightweight concrete, or walls where the back side of the wall cannot be reached and workers cannot enter, and it is easy to work with. As a result, a secure anchor attachment condition can be obtained.

Further, according to the method of the present invention, adhesive is injected into the bag of the anchor body to expand the bag and fix the anchor body to the wall, and at the same time, the rod is attached to the anchor body using the adhesive. In other words, since the adhesive serves both as a means for fixing the anchor body and as a means for attaching the rod, it is particularly excellent in terms of workability and strength for attaching the rod.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an anchor according to an embodiment of the present invention, Figs. 2 to 4 are sectional views showing the installation procedure of the anchor, and Fig. 5 is a sectional view showing another embodiment of the invention. It is. A...Anchor body, 1...Sleeve, 2...Bag body,
3, 7... Rod, 4... Wall, 5... Through hole, 6... Adhesive as injection material.

Claims (1)

[Claims] 1. Consists of an anchor body fixed to a wall and a rod such as a bolt attached to the anchor body, and the anchor body is inserted into a through hole provided in the wall. a cylindrical sleeve; an expandable and retractable bag attached to the sleeve and inserted into the through hole together with the sleeve and placed on the back side of the through hole; and an expandable bag that is injected into the bag and hardens to cause the bag to be inserted into the through hole. and an injection material that expands to a larger diameter than the anchor. 2 An anchor body is constructed by attaching an expandable and contractible bag to the sleeve of the cylindrical body, and the anchor body is inserted into a through hole provided in a wall in the contracted state and with the bag on the back side of the wall. After inserting it in position,
Adhesive was injected into the bag from one end of the sleeve to expand the bag to a larger diameter than the through hole, and a rod such as a bolt was inserted into the adhesive inside the bag from one end of the sleeve. A method for attaching an anchor, which comprises curing the adhesive in a state where the bag body is locked to the back surface of the wall body, thereby fixing the anchor body to the wall body, and also fixing the rod body to the anchor body.