JPH0249872B2 - ANKAABORUTOMEKOMIKOTEIYOJIGU - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a jig for embedding and fixing anchor bolts used for embedding and fixing anchor bolts in concrete walls and the like.

[Technical background of the invention and its problems] A tension-fixing type anchor bolt as shown in FIG. 1 is known as an anchor bolt embedded in a concrete wall (floor) or concrete block. That is, an anchor bolt main body 13 is provided with an expansion taper part 11 at the tip and a male thread part 12 is formed at the other end, and a plurality of anchor bolts (usually four) are fitted into the anchor bolt main body 13 and are attached to the embedding side tip. By moving the anchor bolt body 13 and the bolt collar 16 relative to each other in the axial direction, the expansion taper part 11 is The lip portion 15 is expanded and deformed, and the embedded side is fixed.

Conventionally, the work of embedding and fixing such a tension-fixing type anchor bolt 10 involves first embedding the anchor bolt with the male screw portion 12 and bolt collar 16 protruding from the wall surface (floor surface) by a predetermined length. Next, use a hammer etc. to tighten bolt collar 1.
This was done by striking the upper end of the bolt collar 16, moving the bolt collar 16 forward, and expanding and deforming the lip portion 15.

However, when using the method of driving with a hammer, the driving force increases considerably as the diameter of the anchor bolt increases, making it extremely difficult to drive when used embedded in walls, ceilings, etc.
The driving method also lacks accuracy and has the drawback of being difficult to securely fix. Further, special care must be taken not to hit the anchor bolt body 13.

[Purpose of the invention]

The present invention has been made with these points in mind, and an object of the present invention is to provide an anchor bolt embedding fixing jig that can securely and easily fix tension-fixing anchor bolts of various sizes. With the goal.

[Summary of the invention]

The anchor bolt embedding/fixing jig according to the present invention includes a cylindrical part formed with a female threaded part that is screwed into the male threaded part of the anchor bolt, and a protruding flange part provided on the outside of the cylindrical part. a substantially hollow cylindrical body having an inner diameter larger than the outer diameter of the cylindrical portion of the nut member, having an open end and an abutment surface at the other end; A holder member is formed with a cutout groove having a width larger than the width of the protruding flange portion of the nut member in the direction of the nut member.

The anchor bolt embedding/fixing jig according to the present invention can be used in combination with an automatic anchor bolt press-in machine (for example, the "anchor bolt core press-in machine" filed by the applicant in Japanese Patent Application No. 58-193648). This makes it possible to easily embed and fix tension-fixing anchor bolts.

[Embodiments of the invention]

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

FIG. 2 is an exploded perspective view showing the anchor bolt embedding and fixing jig according to the present invention. In the figure, reference numeral 20 indicates a nut member, and this nut member 20
The anchor bolt 10 includes a cylindrical portion 21 having a female threaded portion that is screwed into the male threaded portion 12 of the anchor bolt 10, and a protruding flange portion 22 provided on the outside of the cylindrical portion 21. A screw hole 23 is provided on the side surface of the cylindrical portion 21 at a position orthogonal to the protruding flange portion 22, into which a retaining screw 24 is screwed. A pair of protruding flange portions 22 are provided at symmetrical positions, and a groove 25 is formed around the outer periphery of the protruding flange portions 22 .

Further, in the figure, reference numeral 30 denotes a holder member, and this holder member 30 has an inner diameter larger than the outer diameter of the cylindrical portion 21 of the nut member 20, and has an open end and a contact surface 31 at the other end. It has a substantially hollow cylindrical body. Further, a notch groove 33 having a width larger than the width of the protruding flange portion 22 of the nut member 20 is formed in the axial direction from the opening portion 32 side. A pair of notch grooves 33 are formed at symmetrical positions, and are capable of receiving the protruding flange portion 22 of the nut member 20. An elongated hole 34 having a width through which the retaining screw 24 can be inserted is provided in the side surface of the holder member 30 in the axial direction.

Further, the reference numeral 40 denotes a spacer, and the spacer 40 has a pressing surface 41 that comes into contact with the upper end of the bolt collar 16, and a hollow cylindrical portion 42 that is loosely fitted into the male threaded portion 12; The flange portion 43 is continuous with the pressing surface 41 and is formed on the opposite side. This spacer 40 transmits the pressing force from the anchor bolt press-fitting machine to the bolt collar 16 of the anchor bolt 10, as will be described later.
The axial dimension thereof is changed depending on the dimensions of the male threaded portion 12 of the anchor bolt 10, the bolt collar 16, etc.

Next, a method of using this embodiment having such a configuration will be explained.

FIG. 3 shows an anchor bolt press-fitting machine 50 used for embedding and fixing the tension-fixing type anchor bolt 10 in combination with the embedding and fixing jig according to this embodiment.
It is an external view showing an example. For example, as mentioned above, this anchor bolt press-fit 50 is provided in a patent application filed by the present applicant (Japanese Patent Application No. 193648/1983), and is provided between a casing body 51 in which a hydraulic drive mechanism is built and a casing body 51 that has a built-in hydraulic drive mechanism. Front end surface 51a
A piston rod 52 protrudes movably forward and backward from the piston rod 52.
and the nut member 20 is brought into contact with a stepped contact portion 53 having a substantially semicircular cross section that comes into contact with the outer periphery and side surface of the protruding flange portion 22 of the nut member 20 screwed into the male threaded portion 12 of the anchor bolt. The anchor bolt clamp mechanism 55 has a holding part that is fixedly held while in contact with the part 53, and the anchor bolt clamp mechanism 55 is fixedly held at a front position separated from the front surface 51a of the casing body 51 by a predetermined distance, and the holder member 30 is fixedly held. The support member 56 has a substantially semicircular cross section and has a space in which the support member 56 can be accommodated. In FIG. 3, the number 57 is a ball elastically supported by a spring 58 (see FIG. 4), and the number 57 is a ball elastically supported by a spring 58 (see FIG. 4).
9 is an electric motor that operates the hydraulic drive mechanism 51.

4 to 7 are partial cross-sectional views showing a method for embedding and fixing the anchor bolt 10 using the above-described anchor bolt press-in machine 50 and the embedding and fixing jig according to this embodiment.

First, the nut member 20 and the holder member 30 are assembled by inserting the protruding flange portion 22 of the nut member 20 into the notch groove 33 of the holder member 30, and then the locking screw 24 is passed through the elongated hole 34 and the nut member 20 is inserted. By screwing into the screw hole 23 of the nut member 20, the nut member 20 is prevented from coming off.

Drill a pilot hole H in the concrete W with a drill or the like, insert the expansion taper part 11, lip part 15 and bolt collar 16 of the anchor bolt 10 into the pilot hole H, and insert it into the male thread part 12 protruding from the concrete wall W. Attach the spacer 40. Subsequently, the nut member 20 held by the holder member 30 is screwed into the male threaded portion 12 while rotating the holder member 30. This screwing operation is possible by rotating the holder member 30 through engagement between the protruding flange portion 22 and the notch groove 33.

After the nut member 20 is screwed into the male threaded portion 12 by a predetermined dimension, the holder member 30 and the nut member 20 are pushed from the lateral direction into the approximately semicircular cross-sectional space of the support member 56 of the anchor bolt press-fitting machine 50. It's crowded. Projected flange portion 2 of nut member 20
2 is fitted with its side surface and outer circumferential portion abutting the abutting portion 53, and is locked when the ball 57 is inserted into and engaged with the groove 25 on the outer periphery. Further, the holder member 30 is housed in a space having a substantially semicircular cross section of the support member 56.

4 to 6 show the state in which the anchor bolt embedding/fixing jig according to this embodiment has been set in this manner.

After setting the anchor bolt embedding/fixing jig to the anchor bolt 10 and the anchor bolt press-fitting machine 50, when the electric motor 59 is operated, the hydraulic drive mechanism is operated and the piston rod 52 moves forward. The tip of the piston rod 52 contacts the contact surface 31 of the holder member 30 and presses the holder member 30 against the flange portion 43 of the spacer 40. The pressing surface 41 of the spacer 40 is in contact with the upper end of the bolt collar 16 of the anchor bolt 10, while the male threaded portion 12 is held by the contact portion 53 of the anchor bolt press-fitting machine 50 via the nut member 20. Therefore, the pressing force acts as a tensile force of the male threaded portion 12 by fixing the contact surface position between the upper end of the bolt collar 16 and the pressing surface 41 of the spacer 40. That is, when the forward movement of the holder member 30 and the spacer 40 is blocked by the concrete wall W, the forward movement of the piston rod 52 in contact with the holder member 30 is prevented by the anchor bolt press-in machine 5.
The protruding flange portion 22 of the nut member 20 is moved in the backward movement direction (FIGS. 4 and 5) via the support member 56 and the contact portion 53. Figure, 7th
(towards the right in the figure). As a result, the male threaded portion 12 is pulled, and the lip portion 15 and the expanded taper portion 1 are pulled together.
1, and the lip portion 15 expands and deforms outward with the slit 14 as a boundary. Due to this expansion and deformation of the lip portion 15, the lip portion 15 bites into the prepared hole H of the concrete wall W, and the anchor bolt 10 is fixed (FIG. 7).

The nut member 20 and the holder member 30 move relative to each other in the axial direction by the tensile movement of the male threaded portion 12;
2 is carried out by moving the holder member 30 in the notch groove 33 in the axial direction.

When the anchor bolt fixing work is completed, the anchor bolt press-fitting machine 50 is moved laterally to remove the nut member 20 and the holder member 30 from the anchor bolt clamp mechanism 55. In this case, the ball 57 pressed against the nut member 20 is elastically displaced by the spring 58, so that the ball 57 is pressed against the nut member 20.
It can be easily removed from inside. After removing the anchor bolt press-fitting machine 50, the holder member 30 is turned to remove the nut member 20 from the male threaded portion 12, and the spacer 40 is removed.

A predetermined member is tightened and fixed to the anchor bolt 10 embedded and fixed in this way by screwing a nut into the male threaded portion 12, but the more the male threaded portion 12 is pulled, the more the lip portion 15 expands and deforms and bites into the concrete wall W, so a strong and stable tightening state can be obtained.

As described above, according to this embodiment, by combining with an anchor bolt press-fitting machine, a tension-fixing type anchor bolt can be easily and reliably embedded and fixed. Furthermore, by preparing the nut member 20 having a female thread corresponding to the thread diameter of the male threaded portion 12 of the anchor bolt 10 and the spacer 40 having an axial dimension corresponding to the length of the male threaded portion 12, various It can be easily adapted to the work of embedding and fixing anchor bolts of different sizes. In this case, if only the female thread of the nut member 20 is changed and the other dimensions are kept the same, there is no need to change the shape and dimensions of the holder member 30, and the number of parts to be prepared is reduced, making handling easier. Become.

Although this embodiment shows an example in which the anchor bolt embedding/fixing jig and the spacer 40 are used in combination, the spacer 40 is not an essential component of the present invention. hand,
By directly contacting the upper end of the bolt collar 16 of the anchor bolt, the same functions and effects as in this embodiment described above can be obtained.

Further, although two protruding flange portions 22 of the nut member 20 are provided at symmetrical positions, one or three or more protruding flange portions may be provided.

〔Effect of the invention〕

As explained above, according to the present invention, by using a tension-fixing type anchor bolt together with an anchor bolt press-fitting machine, it is possible to embed and fix the anchor bolt reliably and easily. According to the present invention, it is not necessary to perform a driving operation using a hammer or the like as in the conventional method, so that the operation is easy and accurate embedding and fixing dimensions can be obtained.

[Brief explanation of drawings]

FIG. 1 is a partial sectional view showing an example of a tension-fixing anchor bolt to which a jig according to the present invention is applied, FIG. 2 is an exploded perspective view showing an embodiment of the present invention, and FIG.
The figure is an external view showing an example of an anchor bolt press-in machine used in conjunction with the jig according to the present invention, and Fig. 4 is a partial sectional view showing a state in which an anchor bolt embedding and fixing work is performed using the jig according to the present invention. FIG. 5 is a partial cross-sectional view taken from the direction of arrow V in FIG. 4, FIG. 6 is a cross-sectional view taken along the line of FIG. 4, and FIG. 7 is a partial cross-sectional view showing the state when the anchor bolt is embedded and fixed. 10... Anchor bolt, 11... Expansion taper part, 12... Male thread part, 15... Lip part, 1
6... Bolt collar, 20... Nut member, 21
...Cylindrical part, 22...Protruding flange part, 25...
Concave groove, 30... Holder member, 31... Contact surface, 3
3...Notch groove, 40...Spacer, 50...Anchor bolt press-fitting machine, 52...Piston rod, 5
3... Contact portion, 56... Support member.

Claims (1)

[Scope of Claims] 1. A nut member comprising a cylindrical portion formed with a female threaded portion that is screwed into the male threaded portion of the anchor bolt, and a protruding flange portion provided on the outside of the cylindrical portion; A substantially hollow cylindrical body having an inner diameter larger than the outer diameter of the cylindrical part of the nut member, and having an open end and an abutment surface formed at the other end, the nut member being inserted in the axial direction from the opening side. An anchor bolt embedding fixing jig comprising a holder member in which a notched groove with a width larger than the width of a protruding flange portion is formed; 2. The anchor bolt embedding/fixing jig according to claim 1, wherein a pair of protruding flange portions of the nut member are provided at symmetrical positions. 3. The anchor bolt embedding/fixing jig as set forth in claim 1, wherein a concave groove is formed on the outer periphery of the protruding flange portion of the nut member.