JPS6224808Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an anchor nut that is drilled and driven into a concrete wall or the like.

(Prior art and problems) The wedge body of the anchor nut is normally installed inside the hollow cylindrical body that serves as the anchor nut, and it has become possible to press it with a hammer or the like when necessary. However, the conventional one was published in 1983.
As shown in No. 7692, a wedge body is fitted into a screw hole of an anchor nut, and a locking protrusion is provided on the wedge body. The wedge body is made of a thin flange that only loosely engages with the female thread of the anchor nut, so although it can prevent the wedge body from moving to a certain extent, it can easily move forward with a slight push or impact. Otherwise, there is a risk that it may move backwards, so if it moves backwards, there is a risk that it may be pulled out from the rear end opening.

(Technical Problem) Therefore, in the present invention, the wedge body fitted into the screw hole of the anchor nut body moves freely forward in the screw hole with a light touch, but there is no back-stop in the backward direction. The technical problem is to prevent the device from being pulled out from the rear end port without permission.

(Function) To install the anchor nut, proceed as follows.

First, a hole is made in the concrete wall 10 with a drill or the like, and the anchor nut body 4 with the wedge body 6 inserted therein is pushed into the hole. When a tool such as an iron rod is pressed from the end opening 5 of the screw hole and the wedge body 6 is pushed forward with a hammer and press-fitted, the split cylinder part 3 is expanded and inserted into the concrete hole because it is pushed toward the tapered hole 2. Since the split tube piece 3a bites into the concrete wall, the anchor nut body 4 will never be able to come out again. Therefore, bolt 11 is inserted into this screw hole 1.
By screwing, the necessary object 12 can be attached to the wall body 10 with screws.

The wedge body 6 is forged using punches and dies using a forging machine such as a multi-stage former. During the forging, as shown in FIG. Piece 7 is integrally molded.

In this way, when the wedge body 6 is inserted into the screw hole 1 from the rear end opening 5 of the anchor nut body 4 before using the anchor nut, the check piece 7 engages with the screw thread 1a, but it does not tilt backward. Because of this, it can freely slide forward by overcoming the threads with a light touch, but from the rear it bites into the threads 1a and is blocked.

(Example) As shown in Fig. 4, the die 13 is used in the final forging process.
When the rear end of the product wedge body 6 that has been installed is struck with a punch 14 having a conical tip, a check piece 7 consisting of a tapered ring that widens in a tapered shape is integrally forged at the rear end of the cylindrical part. It is molded in.

(Effects) As described above, the present invention provides a check piece consisting of a tapered ring that widens backwards on the outer peripheral surface of the cylindrical part of the wedge body, and engages this check piece with the thread on the inner surface of the screw hole of the anchor nut body. With this configuration, the wedge body moves forward freely in the screw hole of the anchor nut body with a light touch, but it is prevented from moving backwards, so it moves backwards without permission. There is no risk of it being pulled out from the end opening, and since it only moves forward, it is always positioned in the direction toward the tapered hole and is set immovably at a fixed position in the front, thus preventing it from rattling inside. There is no rattling sound, so there is no need to worry about noise. In addition, when performing work, the anchor nut can be slid forward by simply pushing lightly from the rear so as to easily go over the threads, allowing the anchor nut driving work to be carried out efficiently. .

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional side view of the anchor nut of the present invention.
Fig. 2 is a longitudinal side view of the state after driving, Fig. 3 is a partially enlarged view showing the state of engagement between the check piece and the thread, and Fig. 4 is a side view showing the method of forming the wedge body by heading. The upper half shows a cross section. 1...Screw hole, 2...Tapered hole, 3...Split tube part, 4...Anchor nut body, 5...Rear end opening, 6
... Wedge body, 7... Check piece, 1a... Screw thread.

Claims (1)

[Scope of utility model registration request] Insert the wedge body 6 from the rear end opening 5 of the screw hole into the anchor nut body integrally formed with the split tube part 3 having the tapered hole 2 deep inside the screw hole 1, and insert the wedge body 6 into the taper hole 2 part. In the device in which the split cylinder portion is forced to expand by force-fitting, a check piece 7 made of a tapered ring that widens backward is integrally formed on the outer peripheral surface of the cylindrical portion of the wedge body 6, and this check piece 7 is attached to the anchor nut. An anchor nut that is engaged with a thread 1a on the inner surface of a screw hole of a body 4.