JPH0243152Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to an anchor for tensile support of concrete formwork, and in particular, the invention relates to an anchor for tensile support of concrete formwork, and in particular, the invention relates to an anchor for tensile support of concrete formwork. The present invention also relates to an anchor that can be connected to a spacer.

[Conventional technology]

The anchor method has been widely used in the past, in which an anchor is inserted into poured concrete that has not yet hardened, and after the concrete has hardened, the anchor is connected to a spacing holder connected to the formwork to support the formwork. It has been adopted. The concrete formwork fasteners used in this anchor method usually have a spacing adjustment function, such as a turnbuckle mechanism, on the spacing holder, so that the installation angle of the formwork can be adjusted (1983- Publication No. 29087, Publication No. 59-29089).

[Problem that the invention attempts to solve]

The concrete formwork fasteners used in the conventional anchor method have the spacing adjustment function as mentioned above and can adjust the installation angle of the formwork, but they have the following problems. .

That is, when inserting an anchor into poured concrete, it is required to set the anchor in a predetermined position from the formwork, but some misalignment of the anchor is unavoidable under the condition that the concrete is not yet hardened. And this misalignment of the anchor cannot be easily corrected after the concrete has hardened.
This causes a problem in that it becomes difficult to connect the anchor to the spacer connected to the formwork.

[Means for solving problems]

The present invention was made to solve the above-mentioned conventional problems, and its purpose is to absorb the misalignment of the anchor and easily connect it to the spacer. To provide concrete formwork support anchors that can be used.

Therefore, according to the present invention, the concrete insertion part 12 for inserting the anchor 3 into the poured concrete A
and a spacing holder connecting part 1 that connects with the spacing holder 2.
It consists of 3.

The concrete insertion part 12 is made of a round bar 14 made of reinforcing steel, is bent to resist pulling out when the concrete hardens, and has a threaded part 15 at one end.

Further, the spacer connecting part 13 is composed of a connecting fitting 16 made of a metal plate bent into a substantially U-shape so as to have a bottom part 17 and both side parts 18, 18.
The round bar 1 of the concrete insertion part 12 is attached to its bottom 17.
4 is formed with a hole 19 for passing the round rod 14 therethrough, and both ends 18,
Holes 20, 20 for passing the joint pin 4 that connects the spacing retainer 2 are formed in the relatively upper part of the nut 18, and claws 21, 21 for preventing the nut 22 from coming off are punched in the relatively lower part. It is assumed that it is formed by

The concrete insertion part 12 and the spacer connecting part 13 are connected to each other by inserting a hole 19 formed in the bottom part 17 of the connecting fitting 16 bent into a substantially U-shape of the spacer connecting part 13 into the hole 19 of the concrete insertion part 12. Threaded portion 15 of round bar 14 protruding from hole 19 through bar 14
The connection is made by screwing the nut 22 into the .

[Function and effect of the idea]

In this way, the anchor according to the present invention has a concrete insertion part 12 inserted into poured concrete A.
and a spacing holder connecting part 13 that connects to the spacing holder 2 connected to the formwork 1, and the concrete insertion part 12 and the spacing holder connecting part 13 are:
Pass the round bar 14 of the concrete insertion part 12 through a relatively large hole 19 formed in the bottom 17 of the connecting fitting 16 bent into a substantially U-shape of the spacer connecting part 13, and insert the screw of the round bar 14 protruding from the hole 19. The spacer connecting portion 13 is connected by screwing a nut 22 to the portion 15, and the spacer connecting portion 13 is rotatable with respect to the concrete insertion portion 12 and can be tilted back and forth and left and right. Even if a positional shift occurs, the shift can be absorbed and the anchor 3 and the spacer 2 can be easily connected. Furthermore, from this point of view, when inserting the anchor 3 into the concrete A, there is no need to worry about misalignment as in the past, and work efficiency can be improved.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which the formwork is supported by anchors, and the anchors 3 are inserted and set into the poured concrete A at a predetermined position from the formwork 1 before the concrete hardens. Once the concrete A has hardened, connect one end of the spacing holder (separator) 2 to the formwork 1 with a joint pin 4,
The other end of the spacing retainer 2 is connected to a protrusion of an anchor 3 inserted and fixed into the poured concrete A by a joint pin 4. As a result, the formwork 1 is tensilely supported by the anchors 3 via the spacer 2.

FIGS. 2 and 3 show two examples of spacing devices 2, the spacing devices 2 being able to vary their effective length. The example shown in FIG. 2 consists of two channel-shaped members 5A and 5B,
A formwork attachment part 7 in which a joint pin insertion hole 6 is formed is provided at the tip of the member 5A on the side connected to the formwork 1. Each member 5A, 5B has a large number of pin holes 8 formed therein so that they can slide relative to each other, and by adjusting the length and inserting a joint pin 9 into the pin hole 8, the member 2A and the member 2B is connected.

The example shown in FIG. 3 consists of a channel-shaped member 5A with a formwork attachment part 7 at the tip and a rod-shaped member 11 equipped with a turnbuckle mechanism 10 for dimension adjustment. They are connected by a joint pin 9.

In the example shown in FIG. 2, the anchor 3 is connected to the end of the channel member 5B by a joint pin 4, and in the example shown in FIG.
1, an anchor 3 is connected to a joint pin 4.

Details of the anchor are shown in Figures 4 to 6,
The anchor 3 is roughly divided into a concrete insertion part 12 that is inserted into the poured concrete A, and a spacing holder connecting part 13 that is connected to the spacing holder 2.

The concrete insertion part 12 is made of a round bar 14 made of reinforcing steel, is bent to resist pulling out when the concrete hardens, and has a threaded part 15 at one end.

Further, the spacer connecting part 13 is composed of a connecting fitting 16 made of a metal plate bent into a substantially U-shape so as to have a bottom part 17 and both side parts 18, 18.
A hole 19 is formed in the bottom part 17 and has a diameter W2 larger than the diameter W1 of the round bar 14 of the concrete insertion part 12 through which the round bar 14 is passed.
Holes 20, 20 for passing the joint pin 4 that connects the spacing retainer 2 are formed at the relatively upper portions of the holes 20, 20, and claws 21, 21, for preventing the nut 22 (to be described later) from coming off, are formed at the relatively lower portions of the holes 20, 20. 21 is formed by punching.

Concrete insertion part 12 and spacer connection part 1
3 refers to the hole 1 formed in the bottom part 17 of the connecting fitting 16 bent into a substantially U-shape of the spacer connecting part 13.
The round rod 14 of the concrete insertion part 12 is passed through the hole 19, and a nut 22 is screwed onto the threaded portion 15 of the round rod 14 protruding from the hole 19. In addition, the concrete insertion part 12 and the spacer connection part 1
3 is connected in advance at the factory.

In use, the round bar 14 made of reinforcing bars constituting the concrete insertion portion 13 is inserted into the poured concrete A at a predetermined position from the formwork 1 before the concrete hardens. Once the concrete hardens, the other end of the spacing holder 2 whose one end is connected to the formwork 1 is connected to the pin hole 8 formed in the spacing holder 2 and the pin hole formed in the connecting fitting 16 that constitutes the spacing holder connecting part 13. Joint pin 4 on 20
By inserting the spacer, it is connected to the connecting fitting 16 that constitutes the spacer holder connecting part 13. As a result, the formwork 1 is tensilely supported by the anchors 3 using the spacer 2.

At this time, the diameter of the round bar insertion hole 19 formed in the bottom part 17 of the connecting fitting 16 that constitutes the spacer connecting part 13 is the same as that of the round bar 19 that constitutes the concrete insertion part 12.
Since the diameter of the spacer connecting part 13 is larger than the diameter of the separator 3, the spacer connecting part 13 can freely rotate and tilt forward, backward, left and right with respect to the concrete insertion part 12, so that even if a positional shift occurs in the separator 3, the shift can be absorbed. The spacer 2 and the separator 3 can be easily connected.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the formwork being supported by anchors, Figs. 2 and 3 are perspective views showing the spacer and the anchors, and Figs. 4 to 6 are examples of the present invention. FIG. 4 is a perspective view, FIG. 5 is a front sectional view, and FIG. 6 is a side sectional view. DESCRIPTION OF SYMBOLS 1... Formwork, 2... Spacing holder, 3... Anchor, 4... Joint pin, 12... Concrete insertion part, 13... Spacing holder connecting part, 14...
Round bar, 15...Threaded part, 16...Connection fitting, 19
... Round bar insertion hole, 20 ... Joint pin insertion hole, 21 ... Nut removal prevention claw, 22 ... Nut.

Claims (1)

[Scope of utility model registration request] An anchor that is inserted and fixed into poured concrete and tension-supports the formwork by connecting the end of a spacing member connected to the formwork to its protruding end, the anchor is inserted into the poured concrete. It consists of a concrete insertion part and a spacing holder connecting part that connects to the spacing holder, and the concrete insertion part is made of a round bar made of reinforcing steel, and is bent to resist pulling out when the concrete hardens. , has a threaded portion at one end, and the spacing retainer connecting portion is made of a connecting fitting made of a metal plate bent into a substantially U-shape so as to have a bottom and both sides, and the bottom A hole with a diameter larger than the diameter of the round bar in the concrete insertion part is formed in the hole for passing the round bar, and a hole for passing the joint pin that connects the spacing retainer is formed at the relatively upper part of both sides. At the same time, a tab is formed by punching at a relatively lower part to prevent the nut from coming off. The connecting fittings are connected by passing the round rod of the concrete insertion part through a hole formed at the bottom of the bent connecting fitting and screwing a nut onto the threaded part of the round rod that protrudes from the hole. Anchors for supporting concrete formwork.