JP4860402B2 - anchor - Google Patents

Description

  The present invention relates to an insert-type anchor used in a so-called tipping method that is mounted on a deck plate that becomes a discarding form before placing concrete.

  Conventionally, as an insert-type anchor used for attaching various facilities to a concrete wall (ceiling wall, side wall, floor wall, etc.), the one shown in Patent Document 1 is known.

  This will be described with reference to FIGS.

  The anchor includes an anchor body 1 having a head 1a and a female thread portion 1b on the distal end side, a stopper 2 fitted and fixed to the outer periphery of the distal end portion of the anchor body 1, and a base that is more than the stopper 2 The washer 3 is loosely fitted on the outer periphery of the anchor body on the end side so as to be slidable in the axial direction, and the compression coil spring 4 presses the washer 3 against the stopper 2.

  The stopper 2 is formed of an elastic material (usually plastic) in the shape of a truncated cone, and is formed so as to be able to expand and contract in the radial direction by providing a plurality of slits 2a on the peripheral wall.

  A concave groove 5 is provided on the outer periphery of the tip of the anchor body 1, and a ring-shaped convex part 6 is provided on the inner periphery of the stopper 2, and the engagement fixing force of the stopper 2 with respect to the anchor body 1 is obtained by engaging them. It has been strengthened.

  8 to 10 show the construction procedure of this anchor. Here, the case where an anchor is installed on a concrete ceiling wall is illustrated.

  Prior to placing the concrete, a deck plate 7 (which has a corrugated shape but may be flat) is installed on the ceiling as a discarded mold.

  The deck plate 7 is provided with an anchor mounting hole 8 which is slightly larger in diameter than the small diameter portion of the stopper 2 and smaller in diameter than the large diameter portion. First, as shown in FIGS. Is inserted from above.

  At this time, the stopper 2 passes through the anchor mounting hole 8 while being reduced in the radial direction, and is restored after passing, so that the deck plate 7 is moved between the stopper 2 and the washer 3 by the spring force of the compression coil spring 4. The entire anchor is fixed to the same plate 7 in a sandwiched state.

  Thereafter, as shown in FIG. 10, concrete 9 is driven onto the deck plate 7 to construct a ceiling wall, and in this state, a bolt 10 for attaching various facilities such as a ceiling material to the female thread portion 1b of the anchor body 1 is constructed. Is screwed from below.

On the other hand, as an anchor used in the post-installation method, that is, an anchor that drills a concrete wall after concrete placement and is fixed with a wedge, as a means for assisting screwing operation (positioning) of a small anchor at a high position, As shown in Patent Document 2, a technique is known in which a guide portion that is widened is provided at the distal end portion of the anchor body, and the bolt end is guided to the female screw portion by this guide portion.
Patent publication 2003-527503 JP 2002-303131 A

  However, since the guide structure shown in Patent Document 2 is provided with a pre-expanded guide part at the tip of the anchor body, the guide part can be used even if it is applied to the tipping method shown in Patent Document 1. It cannot be inserted into the anchor mounting hole 8 of the deck plate 7.

  In this case, the guide portion can be configured to be freely expanded and contracted by an elastic material like the stopper 2, and the guide portion can be reduced by hand and forcibly inserted into the anchor mounting hole 8, but the work efficiency is very high. Get worse.

  For this reason, in the anchor for the tip construction method, the guide structure is required but not adopted, and the improvement of this point has been demanded.

  Therefore, the present invention provides an anchor that can improve the working efficiency of the front-end construction method by applying the guide structure used in the post-installation method.

  According to a first aspect of the present invention, there is provided a stopper configured to be elastically expanded and contracted in a radial direction in a tapered manner on an outer periphery of an anchor main body having a head provided with a female screw portion into which a bolt is screwed. , A washer that can slide in the axial direction of the anchor body, and a compression coil spring that presses the washer against the stopper, and the stopper is inserted into the anchor mounting hole of the deck plate serving as a discarded mold, and the compression is performed. In the anchor that attaches the anchor body to the plate in a state where the deck plate is sandwiched between the stopper and the washer by the spring force of the coil spring, a guide portion is provided on the tip side of the stopper in the anchor body, The guide portion includes a widening extended posture capable of guiding the bolt end toward the female thread portion of the anchor body, and the unloading position. -A first washer as a spring receiver configured to elastically expand and contract in a radial direction to a contracted posture that can pass through the mounting hole, and as the washer, supporting one end side of the compression coil spring; A second washer that is movable in the axial direction of the anchor main body is provided on the anchor tip side from the first washer, and the guide portion is arranged on the outer periphery by the second washer when the guide portion is inserted into the anchor mounting hole. And the deck plate is sandwiched between the washer and the stopper after insertion.

  According to a second aspect of the present invention, in the configuration of the first aspect, the stopper and the guide portion are formed in a truncated cone shape by an elastic material, and are provided so as to be elastically expandable and contractible by providing a slit on the peripheral wall. The stopper and the guide part are fitted and fixed to the anchor body in a state of facing each other.

  According to the present invention, in the anchor for the tipping method, the tip of the anchor main body is provided with a guide portion that is widened and can be expanded and contracted in the radial direction, and as the washer, the first washer as a spring receiver and the axial direction The second washer is provided with a slidable second washer, and the guide portion is compressed from the outer periphery by the second washer and is inserted into the anchor mounting hole of the deck plate. After the insertion, the washer, the stopper, Since the deck plate is sandwiched between the guide portions, the guide portion can be easily inserted into the anchor mounting hole even in the tipping method.

  That is, it is possible to apply the guide structure to the tipping method without difficulty, to facilitate the bolt screwing operation, and to greatly improve the work efficiency.

  In addition, according to the invention of claim 2, since both the stopper and the guide part are formed into a truncated cone shape with an elastic material, and this is configured to be fitted and fixed to the anchor body in an opposing state, The anchor can be manufactured at low cost by using the manufacturing equipment and process of the anchor for the retrofitting method as it is.

  An embodiment of the present invention will be described with reference to FIGS.

  In the embodiment, an anchor installed on a concrete ceiling wall is illustrated as an application target in accordance with the description of the background art. The basic part of this anchor is the same as that of the conventional anchor for the tip construction method shown in FIGS.

  That is, the stopper 12 is fitted and fixed to the outer periphery of the anchor body 11 provided with the head 11a and provided with the female thread portion 11b on the distal end side. A first washer 13 is loosely slidably fitted in the axial direction, and a compression coil spring 14 is wound between the first washer 13 and the head 11a.

  The stopper 12 is formed in the shape of a truncated cone with an elastic material (usually plastic) like the anchor 2 of the conventional anchor, and is provided with a plurality of slits 12a on the peripheral wall in the radial direction. It is formed so that it can be expanded and contracted.

  Further, in order to reinforce the fixing fixing force of the stopper 12 to the anchor main body 11, a ring-shaped convex portion that engages the concave groove 15 on the outer periphery of the distal end portion of the anchor main body 11 and the concave groove 15 on the inner periphery of the stopper 12. 16 is the same as the conventional anchor (see FIG. 2).

  In this anchor, as a new configuration, a guide portion 17 and a second washer 18 are provided on the distal end side of the anchor 12 in the anchor body 11.

  Like the stopper 12, the guide portion 17 is formed in a shape having a truncated conical shape made of an elastic material such as plastic and having a plurality of slits 17a on the peripheral wall. It is configured such that it can be elastically expanded and contracted in the radial direction into the forwardly expanded extended posture shown in FIGS. 5 and 6 and the reduced posture shown in FIG.

  The guide portion 17 is fitted and fixed to the distal end portion of the anchor body so as to face the stopper 12.

  As a structure for strengthening the fixing force of the guide portion 17, similarly to the stopper 12, a concave groove 19 is provided on the outer periphery of the anchor body 11, and a ring-shaped convex portion 20 (see FIG. 2) is provided on the inner periphery of the guide portion 17. It has been.

  3 to 6, the symbols of the concave grooves 15 and 19 and the convex portions 16 and 20 are omitted in order to avoid complication of the drawings.

  The second washer 18 is fitted to the outer periphery of the guide part 17 so as to be movable in the axial direction of the anchor body. When the washer 18 is moved (lowered) to the tip side by hand, the guide part 17 is compressed from the outer peripheral side. Thus, the posture is reduced and is held in this reduced posture.

  In this reduced posture, the outer diameter of the distal end of the guide portion 17 is equal to or smaller than the diameter of the anchor mounting hole 22 provided in the deck plate 21. In other words, the dimensional relationship of the guide portion 17, the second washer 18, and the anchor mounting hole 22 is set so as to be in such a state.

  3 to 6 show the construction procedure of this anchor.

  In inserting the anchor into the anchor mounting hole 22 of the deck plate 21, the second washer 18 is moved downward as shown in FIG. 3 to reduce the guide portion 17 and hold it in this posture.

  In this state, the outer diameter of the distal end of the guide portion 17 is equal to or smaller than the diameter of the anchor mounting hole 22, so that the distal end of the guide portion 17 can be easily inserted into the anchor mounting hole 22 as shown in FIG.

  Next, when the entire anchor is further pushed in and the guide portion 17 is inserted into the anchor mounting hole 22, the guide portion 17 expands on the lower surface side of the deck plate 21 by the restoring force.

  At this time, the second washer 18 is pushed upward by the deck plate 21 with the passage of the guide portion 17 with respect to the anchor mounting hole 22, and further lifted while shrinking the stopper 12, and above the stopper 12. Located (see FIG. 5).

  In this state, the spring force of the compression coil spring 14 acts on the second washer 18 via the first washer 13, and the deck plate 21 is placed between the second washer 18 and the stopper 12 by this spring force. It will be in the state of being pinched elastically.

  As a result, the entire anchor is fixed to the deck plate 21. In this state, as shown in FIG. 6, after the concrete 23 is driven onto the plate 21 and the ceiling wall is constructed, the ceiling is formed on the female thread portion 11b of the anchor body 11. Bolts 24 for attaching various equipment such as materials are screwed from below.

  At this time, since the bolt end is guided toward the female screw portion 11b by the guide portion 17, the bolt 24 is screwed into the female screw portion 11b easily and quickly regardless of some positional deviation or inclination.

  Thus, according to this anchor, the guide structure can be applied without difficulty to the tipping method, the bolt screwing operation can be facilitated, and the working efficiency can be greatly improved.

  Further, in this embodiment, the stopper 12 and the guide portion 17 are both formed into a truncated cone shape with an elastic material, and are configured to be fitted and fixed to the anchor body 11 in a state of facing each other. The anchor can be manufactured at low cost by using the manufacturing equipment and process of the anchor for the retrofitting method as it is.

  By the way, in the case of this anchor provided with the guide part 17, compared with the conventional anchor which does not have the guide part 17, fundamentally, the front end side of the anchor main body 11 is required for attachment of the guide part 17 as shown in the figure. Just extend it by minutes. In other words, the length of the fitting and fixing portion of the guide portion 17 to the anchor main body 11 need only be a dimension required for this fitting and fixing.

  However, the wider the distance between the first and second washers 13, 18, the easier it is for the second washer 18 to be lowered. The operation space may be ensured by setting it longer than the dimension required for fitting and fixing.

  Further, since the stopper 12 and the guide portion 17 may be basically made of the same elastic material, they may be integrated.

It is a perspective view of the anchor concerning the embodiment of the present invention. It is sectional drawing of the anchor. It is sectional drawing which shows 1 of the construction procedure of the anchor. It is sectional drawing which shows 2 of the construction procedure. It is sectional drawing which shows 3 of the construction procedure. It is sectional drawing which shows 4 of the construction procedure. It is a perspective view of the anchor used for the conventional tip construction method. It is sectional drawing which shows 1 of the construction procedure of the anchor. It is sectional drawing which shows 2 of the construction procedure. It is sectional drawing which shows 3 of the construction procedure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Anchor main body 11a Anchor main body head 11b Female thread part 12 Stopper 12a Stopper slot 13 First washer 14 Compression coil spring 17 Guide part 17a Guide part slot 18 Second washer 21 Deck plate 22 Deck plate Anchor mounting hole 23 Concrete 24 Bolt

Claims (2)

  On the outer periphery of the anchor main body with a head provided with a female thread portion into which a bolt is screwed, a stopper configured to be tapered and elastically expand / contract in a radial direction, and an axial direction of the anchor main body A washer that can slide and a compression coil spring that presses the washer against the stopper are provided, and the stopper is inserted into an anchor mounting hole of a deck plate that becomes a discarded mold frame, and by the spring force of the compression coil spring, In the anchor in which the anchor body is attached to the plate with the deck plate sandwiched between the stopper and the washer, a guide portion is provided on the tip side of the anchor body in the anchor body. Passing through the anchor mounting hole, and an expanded posture that can be guided toward the female thread portion of the anchor body. A first washer as a spring receiver that supports one end of the compression coil spring as the washer, and is configured to be elastically expandable and contractible in a radial direction in a contracted posture. A second washer that is movable in the axial direction of the anchor body is provided on the anchor tip side, and when the guide portion is inserted into the anchor mounting hole, the guide portion is compressed from the outer periphery by the second washer, and the reduction is performed. An anchor characterized in that the deck plate is held in a posture and the deck plate is sandwiched between the washer and the stopper after insertion.   The stopper and the guide part are formed in a truncated cone shape by an elastic material, and are configured to be elastically expandable and contractible by providing a slit on the peripheral wall, and the anchor and the guide part are attached to the anchor body in a state of facing each other. The anchor according to claim 1, wherein the anchor is fixed by fitting.

Images