JP4376125B2 - Socket for anchor bolt setter - Google Patents

Description

    The present invention relates to a socket used for implanting an anchor bolt for fixing a device or the like to a structure or a concrete floor.

  As an example of implanting an anchor bolt in concrete, a double nut is fastened to the upper end of the anchor bolt and fixed integrally with the anchor bolt, and the anchor bolt is inserted into a concrete hole into which a chemical capsule that acts as an adhesive is inserted. Insert a socket wrench into this double nut, and then insert a socket adapter attached to a hammer drill into this socket wrench. Then, rotate and strike the anchor bolt, and then remove the double nut.

  As another example, a socket provided with a split nut that engages with the threaded portion of the anchor bolt is fitted to the upper end portion of the anchor bolt, and rotation and impact are applied in the same manner as described above. The gripping action is performed, and the anchor bolt is gripped and fixed by this, and the gripping and fixing state is dissociated as the rotational movement stops, and the socket is removed from the anchor bolt (see, for example, Patent Document 1) ).

JP 2003-326471 A

  As described in the above document, the anchor bolt is inserted into a hole in the concrete floor by fixing the upper end of the anchor bolt with a socket equipped with a double nut or a mesh gripping mechanism, and rotates to the anchor bolt via this fixing means. However, the fixing means using a double nut is troublesome in that it requires two wrenches (spanners) for tightening and fixing the double nut and removing it after construction.

  In addition, the fixing means by the mesh gripping mechanism socket grips and fixes the anchor bolt with the rotational movement at the time of construction, so the work is simpler than the double nut means. The screw of the anchor bolt and the screw part of the gripping mechanism are misaligned, and there is play between the screws, so it cannot be firmly fixed. This looseness is caused by repeated rotation and striking during construction. Cause crushing of screw threads.

  The present invention provides a socket that is firmly fixed to an anchor bolt and that can be easily removed when the anchor bolt is implanted.

  The anchor bolt setter socket that solves the above problems is provided with an anchor bolt screw hole to be screwed into the anchor bolt at the lower portion of the main body having a rotating angular peripheral surface portion on the outer peripheral surface, and the upper portion on the upper surface. A fixing bolt having a square hole for rotation is screwed and received, and between the anchor bolt screw hole and the fixing bolt, the anchor bolt is screwed together with the anchor bolt screw hole. There is provided a pressing body that comes into contact with the upper end surface and the lower end surface of the screw flange portion of the fixing bolt, and which makes the anchor bolt and the main body fixed by a double nut action. In the pressing body, a contact portion between the upper end surface of the anchor bolt and the lower end surface of the fixing bolt is formed in a spherical shape.

  The socket for an anchor bolt setter according to the present invention pushes up the pressing body at the upper end surface of the anchor bolt by screwing the anchor bolt screw hole into the anchor bolt, so that the upper and lower end portions of the pressing body are anchor bolts. The upper end surface of the fixing bolt and the lower end surface of the fixing bolt's screw collar are pressed against each other, and the threaded portion of the anchor bolt and fixing bolt is brought into a double nut action state, and the anchor bolt and socket are firmly fixed without play of the screw portion. Therefore, there is no fear that the threaded portion of the anchor bolt will be crushed during the implantation work, and there is an excessive load due to rotation and hammering of the hammer drill, and the contact parts of the anchor bolt, the pressing body and the fixing bolt will bite into each other. Even if it is in a situation where it is strongly pressed, the rotational frictional resistance of the contact part is reduced if both ends of the pressing body are formed in a spherical shape, In the loosening rotation of the fixing bolt after write, and may workability because it becomes able to rotate easily.

  FIG. 1 shows an embodiment of an anchor bolt setter socket according to the present invention, which will be described below with reference to the drawings.

  In the figure, symbol A is a socket for an anchor bolt setter, and a hexagonal rotation angle in a plan view, in which an attachment socket attached to a hammer drill or a mouth of a manual spanner is fitted on the outer peripheral surface of the cylindrical body 1. It has a peripheral surface portion 2 (FIG. 1), and in the central part, in an order that the anchor bolt screw hole 3, the pressing body hole 4, the fixing bolt screw hole 5 and the circular head receiving hole 6 are penetrated in tandem. It is arranged.

  The anchor bolt screw hole 3 is provided with a diameter corresponding to a desired anchor bolt B diameter to be implanted, and a pin-like pressing body 7 is loosely fitted in the pressing body hole 4 so as to be movable up and down. The pressing body 7 has hemispherical portions 7 a, 7 a formed at upper and lower end portions, and a protruding peripheral step portion 7 b formed at the central portion formed at a portion between the anchor bolt screw hole 3 and a locking peripheral step. It is accommodated in a state of being locked in the hole 4a.

  Further, the fixing bolt screw hole 5 and the head receiving hole 6 are screwed and received with a fixing bolt 8 provided with a square hole 8b having a hexagonal shape for rotation on the upper surface of the circular head following the screw flange portion 8a. It is what.

As an example of implanting the anchor bolt B by the socket A, there is a hammer drill D in which a rod-shaped attachment socket 20 having a downward-shaped square fitting hole 20a is attached to the lower end portion (FIG. 5).
First, the anchor bolt screw hole 3 of the socket A is screwed into the upper end portion of the anchor bolt B, and the socket A is temporarily fixed to the anchor bolt B. At this time, the upper end surface B1 of the anchor bolt B comes into contact with the hemispherical portion 7a at the lower end portion of the pressing body 7 to push up the pressing body 7, and the hemispherical portion 7a at the upper end portion is further threaded 8a of the fixing bolt 8. It will be in the state contact | abutted to the lower end surface 8c.

  Then, the lower end of the anchor bolt B to which the socket A is temporarily fixed is inserted into a hole 10 such as a concrete floor C into which the chemical capsule 9 that acts as an adhesive is inserted, and the angular peripheral surface portion 2 of the main body 1 is inserted into the angular peripheral surface portion 2. A fitting hole 20a of the attachment socket 20 is fitted into the construction hole 10 by rotating and hitting the hammer drill D, and the socket A is further anchored by the rotation and hitting of the hammer drill D. The bolt B is strongly tightened, and the apex portion of each hemispherical surface portion 7a, 7a of the pressing body 7 is strongly pressed against the central portion of the lower end surface 8c of the fixing bolt 8 and the central portion of the upper end surface B1 of the anchor bolt B. Further, the fixing bolt screw hole 5 to which the fixing bolt 8 is screwed and the anchor bolt screw hole 3 to which the anchor bolt B is screwed are respectively pressed. Flip mountain play gap is in close contact will be a strong double nut effect, socket A and the anchor bolt B is firmly fixed, the anchor bolt B is implanted in the concrete floor hole 10 in this state.

  After the implantation, the fixed state is obtained by inserting a square bar-shaped turning handle (hexagon socket wrench) into the square hole 8b of the fixing bolt 8 screwed into the upper part of the socket A and loosening the fixing bolt 8. The double nut action is released, the socket A can be rotated, and removal of the socket A from the anchor bolt B completes the implantation work.

  At the time of implantation, an excessive load is applied to the anchor bolt B and the socket A that are integrally fixed by rotation and hammering of the hammer drill D. As a result, particularly the anchor bolt and the pressing body bite into each other. There is a case in which the fixing bolt 8 cannot be loosened after being implanted due to the strong pressure contact.

Therefore, in the present example, as described above, in the fixed state of the anchor bolt B and the socket A, the pressing body 7 is interposed between the anchor bolt B and the fixing bolt 8 and is formed at both end portions of the pressing body 7. By adopting means for bringing the hemispherical portions 7a, 7a into contact with the upper end surface B of the anchor bolt B and the lower end surface 8c of the fixing bolt 8 to bring them into point contact or spherical contact, The friction resistance is reduced.
Since this is more convenient as the contact surface is smaller, it seems appropriate to use a pin or a sphere in which both ends of the pressing body 7 are formed in a trapezoidal shape.

  Needless to say, the means for implanting the anchor bolt B is not limited to this, and the anchor bolt B is inserted into the concrete hole by fitting the mouth of a manual spanner to the rotating angular peripheral surface 2 of the socket A, regardless of the hammer drill D. The construction means may be screwed into 10.

  The anchor bolt setter socket according to this embodiment pushes up the pressing body at the upper end surface of the anchor bolt by screwing the anchor bolt screw hole into the anchor bolt, so that the hemispherical portions at the upper and lower end portions of the pressing body are The upper end surface of the anchor bolt and the lower end surface of the threaded part of the fixing bolt are pressed into contact with each other, and the screwed portion of the anchor bolt and the fixing bolt is brought into a double nut action state. Since there is no fear of the screw part of the anchor bolt being crushed during the implantation construction, and there is an excessive load due to the rotation and hammering of the hammer drill, each contact part of the anchor bolt, the pressing body and the fixing bolt is Even in situations where they are pressed so hard that they bite into each other, the hemispherical surfaces at both ends of the pressing body are in contact with each other. It is reduced, in the loosening rotation of the fixing bolt after implantation, and may workability because becomes able to rotate easily.

Plan view. Front view. FIG. The state figure which attached the socket to the anchor bolt. Implantation construction diagram.

Explanation of symbols

A Socket B Anchor bolt B1 Upper end surface C Concrete floor D Hammer drill 1 Main body 2 Rotating angular peripheral surface portion 3 Anchor bolt screw hole 4 Pressing body hole 5 Fixing bolt screw hole 6 Circular head receiving hole 7 Pressing body 7a Hemispherical surface part 8 fixing Bolt 8a Screw flange 8b Square hole 8c Lower end surface 9 Chemical capsule 10 Concrete floor hole (Construction hole)
20 Attachment socket

Claims (1)

  An anchor bolt screw hole to be screwed into the anchor bolt is provided in the lower part of the main body having a corner part for rotation on the outer peripheral surface, and a fixing bolt having a square hole for rotation is screwed into the upper part. The anchor bolt screw hole and the fixing bolt are accommodated between the anchor bolt screw hole and the anchor bolt, so that the upper end surface of the anchor bolt and the screw bolt portion of the fixing bolt are below. A pressing body that abuts against the end face and places the anchor bolt and the main body in a fixed state by a double nut action is provided. The pressing body is a contact portion between the upper end surface of the anchor bolt and the lower end surface of the fixing bolt. The socket for an anchor bolt setter according to claim 1, wherein is a spherical shape.

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