JP3823106B2 - Board anchors and hollow slab fasteners - Google Patents

Description

The present invention relates to anchor over you and hollow slabs for Tightened-instrument board.

Conventionally, as the board anchor 41, as shown in FIG. 9, a cylindrical body 42 is divided into a plurality of pieces along the axial direction and screwed to a head side of a bolt 44 with a latch piece 43 opened outward. It has been known. The board anchor 41 is attached to the formwork 46 with the upper end of the hooking piece 43 hooked to the periphery of the mounting hole 45. As another board anchor, there is an invention disclosed in JP-A-2002-54619.
JP 2002-54619 A

  However, in the board anchor 41 shown in FIG. 9, the latching piece 43 screwed into the bolt 44 is rattled by the amount of play of the screw, so that the board anchor 41 is not latched around the periphery of the mounting hole 45 without being evenly opened. There was a problem. In particular, in the case of the plywood formwork 46, the hooks formed on the periphery of the back surface of the mounting hole 45 hinders the latch pieces 43 from being opened evenly. In addition, even if the latching pieces 43 are evenly opened, there is a problem that the bolts 44 are not latched on the periphery of the back surface unless the bolts 44 are located at the center of the mounting hole 45.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a board anchor provided with a latching piece that opens evenly, and a binding tool for a hollow slab combining the same. .

The board anchor according to claim 1 for solving the above-mentioned problem is provided with a plurality of latching pieces opened outward toward the other end side at one end of the shaft body, and the free ends of the latching pieces When the shaft body is fitted into the mounting hole, the positioning body is attached to the portion so that the shaft body is positioned at the center of the mounting hole and the latching piece is opened outward. And Further, the positioning piece is attached at an angle of 120 to 150 degrees in the inner direction with respect to the free end portion of the latching piece. The positioning piece is attached to the latching piece so that the upper portion protrudes upward from the attachment opening when the positioning piece is fitted into the attachment opening. Further, a male screw part is formed at the other end of the shaft body. Further, a high nut is screwed into the male screw portion.
Further, the board anchor according to claim 2 is provided with a symmetrical pair of latching pieces opened outward toward the other end portion at one end portion of the shaft body, and the diameter of the mounting hole to be inserted is set. When φ is defined, the thickness of the shaft between the retaining pieces is (0.8 to 1.0) × φ, the width is (0.2 to 0.3) × φ, and the thickness of the retaining pieces is Is (0.2-0.3) × φ, the maximum opening dimension of the latching piece is (1.25-1.5) × φ, and the inclination angle of the latching piece is 1: 1.5-2. A cylindrical fitting body that is fitted into the mounting hole and positions the shaft body at the center of the mounting hole is provided at the upper part of the shaft body between the latch pieces; A male screw portion is provided on the upper surface of the combined body. Further, a high nut is screwed into the male screw portion.
Further, the board anchor according to claim 3 is provided with a plurality of latching pieces opened outward toward the other end portion of the cylindrical body screwed to the head side of the bolt, and the free end portion of the latching piece. The positioning piece is connected by a ring-shaped fitting body, and the fitting body slides the bolt, and when the bolt is fitted into the mounting opening, the bolt is positioned at the center of the mounting opening. In addition, it is characterized in that the latching piece is opened outward. Further, the fitting body is characterized in that when the fitting body is fitted into the attachment opening, the fitting body is attached to the latching piece so that the upper portion protrudes upward from the attachment opening. Further, the positioning piece is characterized in that it has a thickness for positioning the bolt at the center of the mounting hole. Further, a high nut is screwed into the bolt.
In addition, the hollow slab binding tool is provided with a spacer for mounting the lower slab line on the male screw portion or bolt of the board anchor of claim 2 , 3 or 6, and a connecting column is erected on the upper surface of the spacer, Reinforcing bar restraints for arranging upper slab bars are provided at the upper part of the connecting struts.

The board anchor can be inserted into the mounting hole with one touch. Further, by inserting the positioning piece into the mounting hole, the shaft body or the bolt can be positioned at the center of the mounting hole, and the latching piece can be opened evenly. Further, the pulling force of the board anchor can be increased . It is possible to insert a one-touch anchors for board in mounting openings of the mold, it is possible to suppress displacement due to buoyancy of the installed hollow material into a mold.

  Hereinafter, embodiments of the board anchor, spacer, and hollow slab binding tool of the present invention will be described. First, a board anchor and a spacer to which the board anchor is attached will be described, and then a hollow slab binding tool using the board anchor and the spacer will be described. In each embodiment, the same configuration will be described using the same reference numerals, and different configurations will be described using different reference numerals.

  FIG. 1 shows a board anchor 1 according to a first embodiment. This board anchor 1 is made of synthetic resin, and is provided at two free-end portions of the hook pieces 3 and two hook pieces 3 opened outward from the lower end portion of the shaft body 2 toward the upper end side. It comprises a positioning piece 4 for positioning the shaft body 2 at the center of the mounting hole.

  The shaft body 2 is composed of a cylindrical tip portion 5, a rectangular parallelepiped intermediate portion 6 formed integrally therewith, and a cylindrical male screw portion 7 formed thereon. Then, two hooking pieces 3 opened outward toward the upper end side are integrally formed at the tip portion 5, and a positioning piece 4 is integrally formed at a free end portion of the hooking piece 3.

The positioning piece 4 is attached to the free end portion of the latching piece 3 with a connecting piece 8 at an angle α of 120 to 150 degrees in the inner direction, and a surface extending from the connecting piece 8 to the positioning piece 4 is an intermediate portion. It becomes the parallel surface 9 with a side surface, and becomes the inclined surface 10 in which a tip extends outside from the parallel surface 9.
In addition, the attachment angle of the positioning piece 4 is not limited to the above, and can be attached at an arbitrary angle.

  Further, as shown in FIG. 2 (3), when the positioning piece 4 is fitted into the mounting hole 12 of the concrete slab mold 11, the upper part protrudes upward from the mounting hole 12. Is attached to the free end of the latch piece 3. The positioning piece 4 can also be attached to the free end portion of the latching piece 3 so that the upper portion does not protrude upward from the attachment opening 12.

  FIG. 2 shows a method of attaching the board anchor 1 to the mounting hole 12 of the concrete slab formwork 11. First, as shown in (1) of the same figure, the front-end | tip part 5 is inserted in the opening hole 12 for attachment.

  Next, as shown in (2), when the board anchor 1 is pushed into the mounting hole 12, the latching piece 3 opened to the outside is closed, and the parallel surface 9 of the positioning piece 4 is moved to the side surface of the intermediate portion 6. Pressed.

  Next, as shown in (3), when the latching piece 3 is pushed out from the attachment opening 12 and opened to the outside, the inclined surface 10 of the positioning piece 4 is pressed against the side surface of the intermediate portion 6 for attachment. The shaft body 2 is positioned at the center of the mounting opening 12 by fitting into the opening 12 and this fitting. Then, when the upper portion of the positioning piece 4 slightly protruding from the mounting hole 12 is pushed downward by the nut 13 of the female screw portion 7, the latching piece 3 is evenly pushed open, and the mounting hole 12. It is hung around the periphery of the.

  FIG. 3 shows a board anchor 14 according to the second embodiment. The board anchor 14 is fitted into the mounting hole 12 at the upper part of the shaft body 2 without providing the positioning piece 4 on the hooking piece 3 of the board anchor 1 of the first embodiment. The united body 15 is integrally formed, and the other configuration is the same as that of the board anchor 1 of the first embodiment. This does not have a holding function of the latch piece 3, but secures the anchor holding function.

Shaft body 2 between lock part 3 in the board anchor 14 has a thickness of A when the diameter of the mounting hole 12 phi is (0.8 to 1.0) × phi, the width B ( 0.2 to 0.3) × φ. The latch piece 3 has a thickness C of (0.2 to 0.3) × φ, a maximum opening dimension D of (1.25 to 1.5) × φ, and an angle of inclination of the latch piece of 1 : 1.5 to 2.5. With such dimensions, the pulling strength can be increased.

  FIG. 4 shows a method of attaching the board anchor 14 in the same manner as described above. First, as shown in (1) of the same figure, the front-end | tip part 5 is inserted in the opening hole 12 for attachment. Next, as shown in (2), when the board anchor 14 is pushed into the mounting hole 12, the latching piece 3 opened outward is closed.

  Next, as shown in (3), the fitting body 15 is fitted into the mounting opening 12 to position the shaft body 2 at the center thereof, and the latching piece 3 is pushed out from the mounting opening 12. At the same time, it is evenly opened and latched around the periphery of the mounting hole 12.

  FIG. 5 shows a board anchor 16 according to the third embodiment. This board anchor 16 is provided with a cylindrical body 18 screwed into the head side of the bolt 17 and provided with two latching pieces 19 opened outward toward the other end. A positioning piece 20 is connected to the end portion by a ring-shaped fitting body 20a.

  The positioning piece 20 slides the bolt 17, and when the bolt 17 is fitted in the mounting hole 12, the bolt 17 is positioned at the center of the mounting hole and the latching piece 19 is moved outward. It is something to open.

  As shown in FIG. 5 (6), the positioning piece 20 is also latched so that the upper portion protrudes upward from the mounting hole 12 when fitted into the mounting hole 12 of the mold 11. It is attached to the free end of the piece 19. The positioning piece 20 can also be attached to the free end portion of the latch piece 19 so that the upper portion does not protrude upward from the attachment opening 12.

  Therefore, as shown in (5) of the figure, when the board anchor 16 is pushed into the mounting hole 12, the latching piece 19 closes inward and the positioning piece 20 moves to the upper side of the bolt 17. When the board anchor 16 is further pushed in, as shown in (6) of the figure, the positioning piece 20 is also inserted into the mounting hole 12, and the bolt 17 is positioned at the center thereof, and the latching piece 19 is opened evenly and latched around the periphery of the mounting opening 12. And if the upper part of the positioning piece 20 protruded slightly from the mounting hole 12 is pushed downward by the nut 13, the latching piece 19 can be further pushed open.

  FIG. 6 shows a board anchor 21 according to the fourth embodiment. The board anchor 21 is the same as the board anchor 1 of the first embodiment except that a high nut 22 is screwed into the male thread portion 7 of the board anchor 1 of the first form.

  As shown in FIG. 6, the board anchor 21 is used when a heat insulating material 23 is installed on the mold 11 and the male screw portion 7 cannot be screwed into the spacer 24. The spacer 24 can be attached by screwing the connecting bolt 25 from the spacer 24 side into the high nut 22.

This high nut 22 is screwed to the male screw portion 7 of the board anchor 1 of the first embodiment is not limited thereto, the male screw portion of the board anchor 14, 16 of the second and third embodiments 7 or bolt 17 can also be screwed. The board anchor 21 is attached in the same manner as described above.

  FIG. 7 shows an embodiment of the spacer 26. The spacer 26 is made of a synthetic resin, and a female screw portion 27 is provided through the central portion of the spacer main body having an appropriate height so as to be opposed to the X axis direction and the Y axis direction across the female screw portion 27. Each protrusion 28 is provided, and a reinforcing bar placement portion 29 is formed between the protrusions 28.

  The protrusion 28 is provided on the X axis and the Y axis passing through the center of the female screw portion 27 so that the female screw portion 27 is not blocked by the lower slab rebar 30 placed on the reinforcing bar placement portion 29. It is to make. That is, since the movement of the lower slab reinforcement 30 arranged in the X-axis direction and the Y-axis direction is restricted by the protrusions 28, the female screw portion 27 is not blocked.

  The reinforcing bar placement portion 29 includes a high place placement portion 31 on the X axis and a low place placement portion 32 on the Y axis formed with a step, and the low place placement portion 32 is divided into two by the convex portion 33. It is divided and the lower slab reinforcement 30 can be arranged in parallel. The high place placement section 31 and the low place placement section 32 are for securing different covering thicknesses. For example, when constructing a slab indoors, the lower place placement section 32 has a lower slab muscle 30. When constructing the slab outdoors, the lower slab muscle 30 is laid out on the high place placement portion 31.

  FIG. 8 shows an embodiment of a hollow slab binding tool (hereinafter referred to as a binding tool) 34 using the spacer 26 and the board anchor 1. The binding tool 34 includes a spacer 26, a board anchor 1 provided on the lower side of the female screw portion 27 of the spacer 26, and a connecting column 35 provided on the upper side of the female screw portion 27. Yes.

  The spacer reinforcing bar placement portion 29 is provided with a horizontal bar 30a and a vertical bar 30b of the slab lower bar 30, which are arranged so as not to block the female screw part 27 by the projection 28. The connecting column 35 can be securely screwed into the portion 27.

This connection support | pillar 35 prevents the float of the hollow material installed in the formwork, and the reinforcing bar restraint tool which pinches | interposes the upper slab reinforcement 36 to the upper male screw part 7 is provided. This reinforcing bar restraint device is composed of an upper clamping plate 38 and a lower clamping plate 39, and the horizontal bar 36a of the upper slab bar is placed on the lower clamping plate 39, and the vertical bar 36b arranged on the horizontal bar 36a. An upper clamping plate 38 is placed and fastened with a nut 40. Therefore, it is possible to prevent the hollow material sandwiched between the upper slab reinforcement 36 and the lower slab reinforcement 30 from being lifted.

BRIEF DESCRIPTION OF THE DRAWINGS It is a board anchor of 1st Embodiment, (1) is a front view, (2) is a side view, (3) is a top view. 1A and 1B show a method for attaching a board anchor according to a first embodiment, wherein FIG. 1A is a sectional view in which the tip of the board anchor is inserted into an attachment hole, and FIG. Sectional drawing inserted in the opening for use, (3) is a sectional view in which the anchor for board is attached to the opening for attachment. It is the board anchor of 2nd Embodiment, (1) is a front view, (2) is a side view, (3) is a top view. It shows the mounting method of the board anchor of the second embodiment, (1) is a sectional view in which the tip of the board anchor is inserted into the mounting hole, (2) is a mounting piece Sectional drawing inserted in the opening for use, (3) is a sectional view in which the anchor for board is attached to the opening for attachment. It is the board anchor of 3rd Embodiment, (1) is sectional drawing, (2) is a top view, (3) is AA sectional drawing of (1), (4) is a perspective view, (5 ) And (6) are cross-sectional views of attaching the board anchor to the attachment opening. It is sectional drawing of the anchor for boards of 4th Embodiment. It is a spacer, (1) is a sectional view, (2) is a plan view, and (3) is a perspective view. It is sectional drawing of a binding tool. It is sectional drawing of the conventional board anchor. It is a conventional spacer, (1) is a sectional view, (2) is a plan view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 14, 16, 21, 41 Board anchor 2 Shaft body 3, 19, 43 Hanging piece 4, 20 Positioning piece 5 Tip part 6 Middle part 7 Male thread part 8 Connection piece 9 Parallel surface 10 Inclined surface 11, 46 Form 12, 45 Mounting hole 13, 40 Nut 15 Fitting body 17, 44 Bolt 18, 42 Cylinder 20 a Fitting body 22 High nut 23 Heat insulation material 24, 26, 47 Spacer 25 Connecting bolt 27, 48 Female thread part 28 Protrusions 29 Reinforcing bar placement part 30, 49 Slab lower muscles 30a, 36a Lateral muscles 30b, 36b Longitudinal muscle 31 High place placement part 32 Low place placement part 33 Convex part 34 Tightening tool 35 Connecting strut 36 Slab upper muscle 37 Holding plate 38 Upper clamping plate 39 Lower clamping plate

Claims (9)

  When one end of the shaft body is provided with a plurality of latching pieces that are opened outward toward the other end side, the shaft body is fitted into the mounting opening at the free end of the latching piece. A board anchor characterized in that a positioning piece for positioning the shaft body at the center of the attachment opening and opening the latching piece outward is attached.   One end portion of the shaft body is provided with a pair of left and right symmetrical locking pieces opened outward toward the other end portion, and when the diameter of the mounting hole into which the shaft body is fitted is φ, the hook The thickness of the shaft between the stoppers is (0.8 to 1.0) × φ, the width is (0.2 to 0.3) × φ, and the thickness of the latching piece is (0.2 to 0). .3) xφ, the maximum opening dimension of the latching piece is (1.25-1.5) xφ, and the inclination angle of the latching piece is 1: 1.5-2.5, The upper part of the shaft body between the pieces is provided with a cylindrical fitting body that is fitted into the mounting opening and positions the shaft body at the center of the mounting opening. A board anchor characterized in that a portion is provided.   A cylindrical body screwed to the head side of the bolt is provided with a plurality of latching pieces opened outward toward the other end, and a positioning piece is a ring-like fitting body at the free end of the latching piece The fitting body slides the bolt, and when the bolt is fitted into the mounting opening, the bolt is positioned at the center of the mounting opening and the latching piece is opened outward. Board anchor characterized by being a thing.   2. The board anchor according to claim 1, wherein the positioning piece is attached at an angle of 120 to 150 degrees in an inner direction with respect to the free end portion of the latching piece.   The positioning piece or fitting body is attached to the latching piece so that when the positioning piece or the fitting body is fitted into the attachment opening, the upper part protrudes upward from the attachment opening. Anchor for board described.   2. The board anchor according to claim 1, wherein a male screw portion is formed at the other end portion of the shaft body.   4. The board anchor according to claim 3, wherein the positioning piece has a thickness for positioning the bolt at the center of the mounting hole. 4. The board anchor according to claim 2 , wherein a high nut is screwed into the male screw portion or the bolt. The spacer which mounts a lower slab reinforcement is attached to the male thread part or bolt of the board anchor of Claim 2 , 3 or 6, the connection support | pillar is standingly arranged on the upper surface of this spacer, and a slab is set | placed above the connection support | pillar A binding tool for a hollow slab, comprising a reinforcing bar restraint for arranging upper bars.

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