JPH0711891Y2 - Jigs for embedding anchor bolts in concrete structures - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an anchor bolt embedding jig used when embedding an anchor bolt in a concrete structure using a resin-made anchoring material. is there.

[Prior Art] A method of embedding an anchor bolt in an existing concrete structure using a resin-made fixing material is known.

In this known method, generally, an embedding hole having an inner diameter slightly larger than the diameter of the anchor bolt is bored in a portion of the concrete structure where the anchor bolt is to be embedded, and after cleaning the bored embedding hole, the embedding hole is removed. It consists of loading the inside with the fixing material and then screwing the anchor bolt into the embedding hole while applying an impact in the axial direction of the anchor bolt using a bolt embedding tool.

By the way, in such an anchor bolt embedding method, embedding of the anchor bolt in the embedding hole that has been drilled is as shown in FIG. 6 of the accompanying drawings.
The head of the anchor bolt A is attached to the embedding tool B and is rotated while applying an impact in the axial direction of the anchor bolt A.
Is clamped and fixed, and this is even engaged with the socket F at the tip of the embedding tool B by driving the embedding tool B.

[Problems to be Solved by the Invention] The conventional method of embedding an anchor bolt in a concrete structure using a resin-made anchoring material not only involves a troublesome process such as drilling an embedding hole and cleaning the inside thereof. , When embedding an anchor bolt with an embedding tool, it is necessary to sandwich a washer on its head and tighten and fix two nuts.
Further, after the anchor bolt is embedded by the embedding tool, it takes time and effort to remove the two nuts attached to the head of the anchor bolt. Aside from installing the two nuts on the head of the anchor bolt, removing the two nuts from the head of the anchor bolt that has already been embedded will cause the nut to become distorted or tight when it is driven by the embedding tool. Often difficult to remove. Moreover, this operation must be performed for each anchor bolt, which requires considerable time and labor. Furthermore, the two nuts that are attached to the anchor bolts to be embedded as described above are usually distorted or deformed during the embedding drive by the embedding tool, so it is usually necessary to prepare each anchor bolt as a result. Along with the labor of attaching and detaching the two nuts, it greatly affects the embedding cost of the anchor bolt.

Therefore, an object of the present invention is to embed anchor bolts in a concrete structure that solves the above problems associated with embedding anchor bolts and enables the anchor bolts to be embedded more easily, easily, and at lower cost. The purpose is to provide a jig.

[Means for Solving the Problems] In order to achieve the above object, a jig for embedding an anchor bolt in a concrete structure according to the present invention has a part of the outside so as to engage with a socket of a bolt embedding tool. It has a polygonal nut shape, one end is open and the other end is closed.
It consists of a resin cylindrical body with a hole that engages with the head screw of the anchor bolt inside, and has a widened part at the open end that facilitates the introduction of the anchor bolt, and also defines the hole. It is characterized in that at least a part of the inner wall portion has an inner diameter having a dimension between the diameter of the trough of the outer thread of the anchor bolt and the outer diameter.

[Operation] Since the anchor bolt embedding jig of the present invention thus constructed is made of resin, it can be manufactured at a low cost by an appropriate molding method, and when used, it can be fitted to the screw of the head of the anchor bolt. Since it is engaged with the internal hole while being threaded, it is not necessary to engage the head portion of the anchor bolt in advance prior to the embedding operation. Further, since this jig is made of resin, the head portion of the anchor bolt can be kept intact without fear of damaging the head screw portion of the anchor bolt by the embedding drive by the embedding tool.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 5 of the accompanying drawings.

FIG. 1 shows a jig for embedding an anchor bolt in a concrete structure according to an embodiment of the present invention. The jig shown in the drawing comprises a tubular body 1 made of a suitable synthetic resin such as ABS resin whose outer shape is formed like a cap nut. One end 2 of this tubular body 1 is open and the other end 3 Is closed.
As shown in a partial cross section, a hole 4 that engages with a head screw of an anchor bolt (not shown) is provided inside the cylindrical body 1. The hole 4 has an inner diameter of the anchor bolt. Is dimensioned to be between the outer thread trough diameter and the outer diameter, and tapers outwardly near the open end 2 as indicated by reference numeral 5, whereby When embedding an anchor bolt using an embedding tool (not shown) in the embedding hole provided at the required position of the concrete structure, it is possible to easily align the jig hole with the head of the anchor bolt. ing.

In use, the jig shown in the figure is put on the head of the anchor bolt, the socket of the embedding tool is fitted over it, and when the embedding tool is driven, the jig is screwed into the head of the anchor bolt and engages. So that the anchor bolt can be screwed into an embedding hole provided at a required position in the concrete structure.

Alternatively, the anchor bolt can be embedded by driving the embedding tool while setting the jig in the socket of the embedding tool and pressing it against the head of the anchor bolt.

FIGS. 2 and 3 show a jig according to another embodiment of the present invention. In this case as well, similar to the jig shown in FIG. 1, an ABS resin or other synthetic resin whose outer shape is formed like a cap nut. It consists of a tubular body 6 made of a material, one end 7 of which is open and the other end 8 of which is closed. Inside the cylindrical body 6, as shown in FIG. 3, four ridges 9 are provided parallel to the central axis thereof, and these ridges 9 are positioned at equal intervals so as to face each other on the diameter. A hole 10 is defined for engaging the head screw of the anchor bolt. The height of each ridge 9 is dimensioned such that the distance between the diametrically opposed ridges 9 is between the diameter of the outer thread trough of the anchor bolt and the outer diameter, and To facilitate alignment with the head of the anchor bolt, it is tapered outwardly near the open end 2 as indicated by reference numeral 11. The illustrated jig thus constructed can be used in the same manner as the jig shown in FIG.

In this embodiment, the engaging holes are defined by the four convex shapes 9, but three or four or more convex stripes can be provided at equal intervals if necessary.

Another embodiment is shown in FIGS. 4 and 5, in which an outer end of the tubular body 12 made of ABS resin or other synthetic resin is anchored inward from its open end. Hole 13 with an inner diameter somewhat larger than the outer diameter of the bolt,
A hole 14 having an inner diameter between the outer diameter and the root diameter of the anchor bolt, a hole 15 having an inner diameter somewhat larger than the root diameter of the anchor bolt, and a recess 16 located at the bottom of the hole 15 are concentric in order. Is provided for the purpose. The outermost hole 13 acts so that the anchor bolt can be set stably at the time of use. In addition, the recess 16 is such that the end of the anchor bolt is a hole at the innermost position when used.
The contact between the end of the anchor bolt and the end face of the hole 15 is reduced when reaching the innermost part of the hole 15.

In each embodiment, the outer shape of the jig is formed in a hexagonal nut shape, but it can be formed in any polygonal shape as long as it fits the socket of the embedding tool used.

[Advantages of the Invention] As described above, the anchor bolt embedding jig in the concrete structure according to the present invention can be embeded by an embedding tool simply by aligning it with the head of the anchor bolt upon embedding. In addition, the labor can be greatly reduced as compared with the case of using the two nuts that require the two nuts to be fastened to each other on the head of the anchor bolt. Also, since this jig is made of resin, there is no risk of damaging the head screw part of the anchor bolt by the embedding drive by the embedding tool, and it can be made by molding itself, and the manufacturing cost can be kept low, As a result, this type of embedding time and cost for anchor bolts can be significantly reduced and reduced.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional front view showing an embodiment of an anchor bolt embedding jig in a concrete structure according to the present invention, and FIG. 2 is a view similar to FIG. 1 showing another embodiment of the present invention. FIG. 3 is a bottom view of the jig of FIG. 2, FIG. 4 is a longitudinal sectional view showing still another embodiment of the present invention, FIG. 5 is a bottom view of the jig of FIG. 4, and FIG. FIG. 6 is a schematic partial cross-sectional view illustrating a conventional anchor bolt embedding method. In the figure 1 ... Cylindrical body 2 ... Open end of tubular body 3 ... Closed end of tubular body 4 ... Hole 5 ... Tapered expansion

Claims (1)

[Scope of utility model registration request] 1. A jig for embedding an anchor bolt, which is used when embedding an anchor bolt by using a bolt embedding tool in an embedding hole formed in a portion of a concrete structure in which the anchor bolt is to be embedded. A resin cylinder with a polygonal nut part on the outside to engage with the socket of an embedded tool, one end open, the other end closed, and a hole inside that engages with the head screw of the anchor bolt A main body, which has a widened portion at the open end to facilitate the introduction of the anchor bolt, and at least a part of the inner wall portion defining the hole has a diameter of a trough of the outer thread of the anchor bolt. A jig for embedding an anchor bolt in a concrete structure, which has an inner diameter between the outer diameter and the outer diameter.