JPH0959995A - Holder of anchor for burying concrete - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an anchor holder for burying, which is removed and post- treated easily after concrete curing and has excellent durability, by integrally forming a holder body of an India rubber. SOLUTION: A holder body 4 having a longitudinal rectangular shape in a front view is formed integrally of an India rubber by projecting thick holding section 5 and fixing section 6 to the anchor insertion side, and magnetic rubbers 22 are fitted at three stages on the reverse side. A metallic mounting plate 7 is projected from the upper end face of the fixing section 6 to the reverse side to the fixing section 6, and fixed by screws 8. A large diametral section and upper-lower recessed grooves are formed at approximately a center in the vertical direction of the holding section 5. A pair of left-right anchor mounting holes 11 are formed, and nuts 15 made of a rubber are set up from the large diametral side. The male screws 2 of anchors 1 are screwed to the nuts 15, the mounting plate 7 is put on the upper-end flange of forms, and attracted onto a form surface by the magnetic rubbers 22, and concrete is placed. The forms are removed after curing, and the upper end of a holder 23 is carried and deflected to the outside and the holder is peeled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor holder for holding an anchor buried in a foundation concrete of a house when the foundation concrete is cast.

[0002]

2. Description of the Related Art In a foundation of a house, a receiving metal fitting for receiving a floor, a haul or the like is attached to an anchor which is previously embedded in foundation concrete. FIG. 9 shows a structure for mounting a large bridge and a large bridge using such anchor bolts. In the figure, (31) is an embedded anchor, which is embedded in advance so that the male screw at the tip projects from the side surface of the concrete foundation (32),
In addition to attaching the metal large pull bracket (34) to this anchor (31), the end of the wooden pull rod (35) is installed on the bracket (34) and attached by nailing etc. .

The anchor (31) is made up of the foundation concrete (3
It is to be installed in the formwork in advance before placing 2).
5 and FIG. 5 show a holder and a method of installing the holder on the mold for that purpose. (36) is a holder in which a metal plate is formed in an inverted L shape when viewed from the side, and the lower portion of the vertical portion is recessed in one side in a dish shape. As shown in FIG. The male screw part of the L-shaped anchor (31) is inserted into the bolt hole (37) of the above, and is tightened and fixed by the nut (38) screwed to the tip thereof. As shown in FIG. 5, the retainer (36) to which the anchor (31) is attached in this way is
To the upper flange (41) of one of the rising formwork (39) (39) that forms both inner and outer surfaces of (2), attach the upper end of the retainer (36) (4
0) is placed to hold the anchor (31) at a predetermined height position in the molds (39) (39). Then, in this state, concrete (32) as shown in FIG.
After the concrete (32) is hardened, the form (39) is removed, the nut (38) is removed, and the holder (36) is removed from the anchor bolt (31) for reuse.

[0004]

[Problems to be Solved by the Invention] The above-mentioned conventional holder (36)
Is formed by integrally molding a metal plate, but the dish-like portion is fitted into the concrete (32), and the cast concrete (32) is firmly adhered to the metal surface in a cured state. Therefore, it cannot be easily removed by hand,
As shown in FIG. 6, the upper end portion is hit with a hammer or the like to weaken the adhesive force between it and the concrete (32), and then the concrete (32) is removed. For this reason, in the past, when repeatedly used, the hit part was dented, and in particular, the horizontal part (41) at the upper end to be placed on the form (39) was distorted as shown in FIG. There is a problem that the installation height from the top of the formwork (39) to the anchor (31) is out of order.

In addition, if you hit it too hard, the concrete (3
Since it will be chipped or cracked in 2), it is necessary to hold it only by tapping it, and the retainer (36) itself is not in a completely detached state. If you hold the part protruding from the top of (32) and pull it strongly outward, the plate-shaped vertical part will bend when it is broken, and you must hit it back to reuse it,
In addition, there is a drawback that cannot be completely repaired.

Further, the removed holder (36) has a problem that the hardened concrete adheres to the surface thereof, and the adhered concrete must be peeled off before reuse. Since the average number of the holders (36) is 140 to 160 per house, a large amount of time is spent for this purpose, which is a factor of increasing the construction cost.

In particular, since the retainer (36) is formed by press-molding a metal plate, the nut side portion for fixing the anchor (31) is formed in a dish-like recess as described above, and is used when driving. The wraparound concrete accumulated and adhered to this dish-shaped portion, and the work of peeling off the concrete was more troublesome and time-consuming. In this case, the wire brush is attached to the tip of the drill, but it still cannot be removed completely and cannot be reused after several uses.
It has accumulated. And foundation concrete (32)
Also on the skin surface of the, there is a dent in the part attached to the holder,
It is also supposed to make the appearance worse. In addition, as described above, the distortion of the retainer (36) itself increases each time reuse is repeated, so that the gap between the formwork and the retainer becomes large, and there is a problem that the wraparound of concrete increases more and more. is there.

Further, in order to facilitate the separation from the concrete (32), conventionally, a release material is applied to the contact surface with the concrete (32), but the applied release material is the anchor (3).
It also adheres to the buried part of 1), weakens the anchoring force of the anchor (31) to the concrete (32), and also fixes the magnet (42) with screws to fix it to the form (34). However, there is an inconvenience that the magnet (42) easily comes off due to the deformation as described above.

The present invention solves the above drawbacks of the prior art, and is much easier to remove and post-treat after the foundation concrete has been set and is hardened, and is excellent in durability. It is intended to provide a retainer for a concrete embedded anchor.

[0010]

In order to solve the above-mentioned problems, according to the present invention, there is provided a retainer which is attached to a form at the time of pouring concrete for a house and is removed after the concrete is hardened. All or most of the portion that comes into contact with the concrete to be poured are integrally formed of a soft material such as rubber.

In the above, it is conceivable that the mounting portion to the mold is made of a metal plate.

Further, it is usually conceivable that a mounting hole for the anchor is provided in the mounting portion of the embedded anchor, and a rubber nut for fixing the anchor is detachably embedded in the mounting hole.

[0013]

In the holder according to the present invention, as described above, all or most of the portion that comes into contact with concrete is integrally formed of a flexible material such as rubber, so that hitting and impacting can be prevented as in the conventional case. However, you can easily remove it by bending it while pulling it outward. Further, unlike the metal plate, the concrete mass does not adhere and the concrete powder adheres to the surface, so that the post-treatment is extremely easy.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a holder of the present invention and a method of attaching an anchor attached thereto. In the figure,
(1) is a roughly L-shaped anchor embedded in basic concrete, which has a male screw (2) formed at one end and at a fixed length from the male screw (2) side end. A flange (3) is formed on the.

(4) is a holder main body, which is formed in a slightly elongated rectangular shape when viewed from the front, and has a thicker wall in a lower half portion thereof so as to project toward the insertion side of the anchor (1). Holding part (5) is integrally formed, and the holding part is formed on the upper end.
The fixing portion (6) is formed to be slightly thick so as to project in the same direction as the projecting direction of (5). A horizontal metal mounting plate (7) is provided on the upper end surface of the fixed portion (6) so as to project in the direction opposite to the projecting direction of the fixed portion (6) and the holding portion (5). It is fixed. This mounting plate
(7) constitutes the mounting portion of the present invention. (8) (8) ...
Is a screw for fixing the mounting plate (7) to the fixing portion (6). Recesses (9) are formed at both ends of the mounting plate (7) in the left-right direction, and a V-shaped notch is formed at the center of the tip.
Although (10) is formed, these are not particularly related to the present invention.

On the other hand, the holding portion (5) has a pair of left and right anchor mounting holes (11) (11) at approximately the center in the vertical direction.
Are formed. This anchor mounting hole (11) is shown in Fig. 2.
As shown in, the surface side opposite to the protruding direction of the holding part (5) has a large diameter (12), and the concave groove (13) (13) (13) is formed on both upper and lower sides of the mouth part of the large diameter part (12). ) Is formed.

Reference numeral (15) is a rubber nut screwed to the male screw (2) to fix the anchor (1) to the holding portion (5), and the large diameter portion of the mounting hole (11). (12) large diameter portion (16), projections (17) (17) formed on the outer periphery of the large diameter portion (16) and engaging with the groove (13), and mounting holes A small diameter portion (19) that fits the small diameter portion (18) of (11) is formed, and a screw hole (20) is formed so as to penetrate in the center line direction. That is,
The nut (15) is inserted into the mounting hole (11) from the surface opposite to the projecting direction of the holding part (5) so that it does not project from the holding part (5) and does not rotate. It can be installed. And in this state, the anchor from the other side
Push the tip of (1) on the male screw (2) side firmly into the screw hole (20) and rotate it a little to make the male screw
(2) and the screw hole (20) are held in a mutually screwed state. When removing the anchor (1), the anchor (1) or the nut (15) can be easily removed by strongly pulling each other without rotating the anchor (1) or the nut (15).

Further, as shown in FIG. 1, the upper and lower magnetic rubbers (22), (22) ... On the surface of the holder body (4) on the side of the nut (15).
The holder body (4) is installed by being fitted, and the surface of the holder body (4) has magnetism.

The method of attaching the holder (23) is the same as that of the conventional example, and as shown in FIG. 2, the upper mounting plate (7) is attached to the upper surface of the rising frame (23) and the upper surface of the flange (24). Then, the surface of the holding portion (5) opposite to the protruding side is magnetically attached by the magnetism of the magnetic rubber (22). The anchor (1) is held in advance by the holding portion (5) so as to project inward of the mold (23). In this state, the foundation concrete (25) is placed and the concrete (25)
After hardening, the rising formwork (23) is removed, and the holder (3) of the present invention is removed while being removed from the anchor (1).

FIG. 3 shows a state in which the holder (23) is removed. When the holder main body (4) is held outward and pulled, the holder main body (4) is made of rubber. Anchor body by flexing by elasticity and pulling more strongly
While the nut (15) is held by the holding portion (5) from the male screw (2) of (1), the elasticity of the nut (15) causes the thread of the screw hole (20) to bend and be pulled out. Holding part (5)
Is separated from the basic concrete (25) and removed.

In the above removing work, first, the holder main body (4) made of rubber is peeled from the surface of the basic concrete (28) while being bent as described above, so that it has no conventional flexibility. Unlike a metal plate, it peels off gradually from the upper end side, so it can be peeled off and removed relatively easily, and due to its characteristic weak adhesion to concrete (25), lumps of concrete, etc. The holder body
It does not adhere strongly to the surface of (4), and it is peeled off only when the concrete powder adheres. Therefore, unlike the conventional case, it is not necessary to hit with a hammer or the like, and even if the holder main body (4) itself bends, its elasticity immediately restores the original state, so there is no inconvenience that the whole remains deformed.

[0022]

As described above, according to the present invention, at least most or all of the contact portion of the holder with the concrete surface is integrally formed of a flexible material such as rubber having elasticity. By using the flexibility and peeling it while bending it, it is possible to extremely easily remove it from the placed concrete surface. Therefore, there is no inconvenience of hitting with a hammer or bending when peeled off as in the conventional case, and there is no inconvenience of dislocating the anchor when reusing due to the distortion. Also, even if small pieces of concrete, etc. come off, they can be easily dropped by bending the whole in an arched shape, etc., and the remaining concrete powder can be easily dropped by washing with water, as described above. Combined with the ease of removal work, the time from removal to post-treatment is 10
There is an effect that it can be shortened to one-tenth or more. Moreover, since it does not deform as described above, the conventional metal holder can be used only about 10 times, whereas the holder of the present invention can be reused several tens of times or more. It can be obtained and has extremely excellent durability.

In addition, by integrally molding rubber or the like, unlike the conventional example in which a metal plate is press-molded, there is no need to form a dish-shaped recess, so that concrete wraps around and the concrete is removed. There is no inconvenience that the work becomes extremely difficult, which also makes the work easier and improves the durability. Furthermore, since it can be easily peeled off from the concrete surface as described above, it is not necessary to apply a release agent to the contact surface, and the release agent adheres to the anchor and weakens the anchoring force of the anchor to concrete. There is no such inconvenience.

[Brief description of drawings]

FIG. 1 is a perspective view of a holder and an anchor showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a main part of a state after concrete placing using the holder of the present invention.

FIG. 3 is a longitudinal sectional view of an essential part showing the middle of the removal work of the holder of the present invention.

FIG. 4 is a perspective view of a conventional holder and anchor.

FIG. 5 is a perspective view of an essential part showing a state where the conventional holder is installed in the mold.

FIG. 6 is a perspective view of a main part showing a conventional method for removing a holder.

FIG. 7 is a perspective view of a main part showing a deformed state of an upper end portion of a conventional holder.

FIG. 8 is a perspective view showing the middle of the conventional method of removing the holder.

FIG. 9 is an exploded perspective view of essential parts showing a method of attaching a hauling fitting and a hauling to an anchor embedded in a foundation concrete.

[Explanation of symbols]

 (1) Anchor (2) Male screw (4) Holder body (5) Holding part (7) Mounting plate (11) Mounting hole (15) Nut (20) Screw hole (22) Magnetic rubber (23) Holder

Claims (4)

[Claims] 1. A retainer that is attached to a formwork when a basic concrete of a house is cast and is removed after the concrete is hardened, and at least all or most of the portion that comes into contact with the concrete to be cast is rubber. An anchor holder for concrete embedding, characterized by being integrally formed of a flexible material such as. 2. The holder for an anchor for concrete embedding according to claim 1, wherein the attachment portion to the form is made of a metal plate. 3. The anchor for a concrete embedding anchor according to claim 1, wherein a mounting hole for the embedding anchor is provided. 4. The holder for an anchor for concrete embedding according to claim 3, wherein a rubber nut for fixing the anchor is detachably embedded in the mounting hole.