JP3994396B2 - anchor - Google Patents

Description

  The present invention relates to an anchor provided on the back surface of a front panel and embedded in concrete.

Patent Document 1 discloses that, in an anchor embedded in concrete, a cap is provided on the inner side of a pressing member, and a stud bolt, a retaining member, and a nut are accommodated in an inner space of the cap.
Patent Document 2 discloses that in addition to the configuration disclosed in Patent Document 1 described above, in order to prevent the cap from falling off the pressing member, a drop-off preventing member fitted to the nut and the cap is provided. Has been.

Japanese Patent No. 2745286 JP-A-8-326209

However, in the prior art disclosed in Patent Document 1 and Patent Document 2, since the pressing member is exposed to the concrete, the pressing member may be corroded by the alkali component of the concrete, and may be deteriorated or damaged.
Further, in Patent Document 1, the cap has a rectangular parallelepiped shape and is inserted into the U-shape of the pressing member having a substantially U-shaped cross section. For example, after attaching the anchor to the back surface of the front panel, the cap is embedded in the concrete. However, there is a risk that the cap may come off from the pressing member when it is transported to the place. On the other hand, in Patent Document 2, a cap drop-off prevention member is provided, but there is a problem that the number of parts increases.

  Therefore, an object of the present invention is to provide an anchor that can prevent the cap from coming off without increasing the number of parts and can prevent deterioration and damage due to corrosion.

  The invention according to claim 1 is a receiving device having a substantially circular shape in plan view, in which a stud bolt fixed to the back surface of the front panel passes through a substantially central portion and is disposed on the back surface of the front panel, and receives the back surface of the front panel. The pressing member includes a substantially circular pressing member that is in contact with the back surface of the steel plate, a retaining member, a nut, and a substantially cylindrical cap that is embedded in the concrete. The pressing member has a through-hole through which a stud bolt penetrates in the center. And the retaining member has a central portion that contacts the back surface of the receiving member in the through hole of the pressing member and an outer peripheral portion that contacts the back surface of the pressing member. The stud bolt penetrates, the nut is fastened to the stud bolt on the back surface of the retaining member, the cap is made of heat-resistant resin, and has a screw portion that is screwed to the screw portion of the holding member on the inner peripheral surface of the side wall. Co It has a retaining portion for cleats on the outer surface, and the side wall is in contact with the back surface of the front panel, and a stud bolt, a receiving member, a pressing member, a retaining member, and a nut are housed in the inner space. .

  The invention according to claim 2 is the cushion material according to claim 1, wherein the pressing member is made of a heat-resistant resin and fills a gap between the retaining member and the pressing member in the through hole of the pressing member. The retaining member and the receiving member sandwich the pressing member, and a gap is provided between the side wall of the cap and the receiving member.

In the first aspect of the invention, the receiving panel is placed on the back surface of the front panel and receives the front panel, so that, for example, when stress concentration occurs on the front panel during drying of concrete or thermal expansion, the surface panel is deformed. The appearance of the front panel is good.
Since the cap has a substantially circular shape in plan view, and the screw portion on the inner peripheral surface thereof is screwed and fixed to the screw portion on the outer peripheral surface of the pressing member that is substantially circular in plan view, the cap is screwed into the holding member. It can be easily fixed to the cap and the cap can be prevented from falling off. Moreover, since the cap is screwed into the pressing member, there is no increase in the number of parts for preventing the cap from falling off.
The cap abuts the side wall of the cap against the back of the front panel, and the stud bolt, holder, holding member, retaining member, cushioning material and nut are stored in the inner space. The alkaline component can be prevented from entering the cap, and the metal member in the cap can be prevented from being deteriorated or damaged by corrosion.
Since the cap is made of resin, it is possible to prevent the cap from being corroded by the alkaline component of concrete and sticking to the surface panel, and to ensure relative movement of the cap with respect to the surface panel.

Since the cap is a heat-resistant resin, it can be prevented from being damaged by receiving heat from the surface panel.
The invention according to claim 2 has the same effect as that of the invention according to claim 1, and in the case where relative displacement in the in-plane direction occurs due to the difference in thermal expansion between the surface panel and the concrete, the stud bolt The retaining bolt and the retainer move relative to the retaining member and the cap, and the cushion material disposed in the gap between the retaining member and the retaining member contracts between the side wall of the cap and the retaining member. In the gap provided in, the relative displacement in the in-plane direction caused by the difference in thermal expansion between the surface panel and the concrete is absorbed.
Since the cushion material is placed in the through hole of the pressing member to fill the gap between the retaining member and the pressing member, for example, until the anchor is attached to the back surface of the front panel and then embedded in the concrete The stud bolt can be held at an appropriate position (substantially in the center) in the through-hole even when it is subjected to positional displacement during transportation or force when concrete is poured into the mold. In this way, by holding the stud bolt in an appropriate position, a space in which the stud bolt can be relatively moved in the through hole of the holding member can be secured, and the relative displacement in the in-plane direction caused by the difference in thermal expansion between the surface panel and the concrete. Can be reliably absorbed.
Since the pressing member in addition to the cap is also made of resin, even if an alkaline component of concrete intrudes into the cap, it is possible to prevent the pressing member from adhering to the holder and the retaining member due to corrosion. Furthermore, since the pressing member is made of resin, when the retaining member and the receiving tool that are in contact with the pressing member are made of a metal material, it is possible to prevent the contact portion between these members from being stuck by electrolytic corrosion.
Since the cap and the pressing member are made of heat-resistant resin, the cap and the pressing member can be prevented from being fused or damaged by receiving heat from the front panel, and the function of absorbing the relative displacement can be prevented.
Furthermore, by making the cap and the pressing member made of resin, the anchor can be made lighter than in the case of metal, and the weight can be particularly reduced in a panel to which a large number of such anchors are attached.
According to the present invention, as described above, the adhesion of the concrete due to the alkali component corrosion and the damage to the surface panel due to the heat are prevented, and the stud bolt is held at an appropriate position. Elongation and shrinkage can be reliably absorbed.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a view of the A part and the D part shown in FIG. 4, (a) is a longitudinal sectional view, (b) is a BB sectional view of FIG. 1 (a), and FIG. 2 is shown in FIG. It is a figure of C section, and is sectional drawing cut | disconnected by the same position as BB shown to (a) of FIG. 1, FIG. 3 is a figure of E section shown in FIG. It is sectional drawing cut | disconnected in the same position as BB shown, and FIG. 4 is a front view of the wall panel using the anchor concerning embodiment of this invention.
The wall panel 3 using the anchor 1 according to the embodiment of the present invention includes a surface panel 5, concrete 7, and an anchor 1 that is attached to the surface panel 5 and embedded in the concrete 7.
The front panel 5 is made of metal, and is made of an aluminum alloy in the present embodiment. A large number of anchors 1 are attached to the back surface 5a of the front panel 5, and the anchors 1 provided at each position of the front panel 5 have through-holes 11 formed in the pressing members 9 described later according to the attachment positions. The shape is different, and the shape absorbs the relative displacement generated at each position. In FIG. 4, the anchor 1 of the E portion located at the approximate center in the vertical and horizontal directions of the surface panel is a fixed anchor, and the other anchors 1 of the A portion, the C portion, and the D portion are movable anchors.
The anchor 1 includes a stud bolt 13 fixed to the back surface 5a of the front panel 5, and a receiving member 15, a pressing member 9, a retaining member 17 and a nut 19 in this order from the back surface 5a side of the front panel 5. It is stored in the inner space 23 of the cap 21.
The receiving member 15 is made of an aluminum alloy having a substantially circular shape in plan view, is disposed in contact with the back surface 5a of the front panel 5, and a stud bolt 13 is penetrated through a substantially central portion thereof. The receiver 15 receives the front panel 5 and also receives the pressing member 9 and the retaining member 17.
The pressing member 9 is disposed on the back surface side of the receiving member 15, and a through hole 11 is formed in the approximate center. The pressing member 9 is made of a substantially cylindrical heat-resistant resin and has a substantially circular shape in plan view.
In the pressing member 9, the inner peripheral portion 24 forming the through hole 11 is in contact with the back surface of the receiving member 15, and a screw portion 29 is formed on the outer peripheral surface 27.
The retaining member 17 is provided with a central portion 31 that contacts the back surface of the receiving member 15 in the through hole 11 of the pressing member 9 and an outer peripheral portion 33 that contacts the back surface of the pressing member 9. The retaining member 17 is made of an aluminum alloy having a substantially circular shape in plan view, and a central portion 31 is a stepped portion projecting toward the support 15 side.
Further, a stud bolt passes through substantially the center of the central portion 31, and the nut 19 is fastened to the stud bolt 13, so that the inner periphery of the pressing member 9 is between the outer peripheral portion 33 of the retaining member 17 and the receiving member 15. The part 24 is sandwiched. The contact surface 30 between the retaining member 17 and the pressing member 9 and the contact surface 32 between the receiving member 15 and the pressing member 9 are each coated with a sliding material.
A ring-shaped gap 35 is formed between the central portion 31 of the retaining member 17 and the inner peripheral portion 24 of the pressing member 9, and the central portion 31 of the retaining member together with the stud bolt 13. Can be displaced. The gap 35 is filled with an elastically deformable ring-shaped cushion material 37. The cushion material 37 is, for example, foamed polyethylene.
The cap 21 has a substantially cylindrical shape made of heat-resistant resin, and the end of the side wall 41 abuts against the back surface 5a of the front panel 5, and the stud bolt 13, the receiving member 15, the retaining member 17, The holding member 24 and the nut 19 are accommodated.
A retaining portion 39 embedded in the concrete 7 is provided outside the cap 21. Each of the heat-resistant resins constituting the cap 21 and the pressing member 9 is preferably a heat-resistant resin having a temperature of 90 ° C. or higher. In the present embodiment, polyethylene or polypropylene is used.
A screw part 45 is formed on the inner periphery of the side wall 41 of the cap 21, and is screwed with the screw part 29 of the pressing member 9 to be fixed to the back surface 5 a of the front panel 5.
A gap 48 is formed between the side wall 41 of the cap 21 and the receiver 15, and the receiver 15 and the cap 21 can be moved relative to each other by the gap 48.

Next, the manufacturing method and effect | action of the wall panel 3 using the anchor 1 concerning this Embodiment are demonstrated. In manufacturing the wall panel 1, first, the receiving member 15 is passed through the stud bolt 13 fixed to the back surface 5 a of the front surface panel 5, and the holding member 9 is passed through the through hole 11 of the pressing member 9 and through the stud bolt 13 to the back surface 5 a of the receiving member 15. And a ring-shaped cushion material 37 is disposed on the inner periphery of the pressing member 9. Next, the nut 19 is fastened to the stud bolt 13 by passing the stud bolt 13 through the retaining member 17 so that the central portion 31 of the retaining member 17 is fitted into the inner periphery of the cushion material 37. Then, the screw portion 45 formed on the inner side of the side wall 41 of the cap 21 is screwed to the screw portion 29 formed on the outer periphery of the pressing member 9 so that the cap 21 is attached to the pressing member 9 and the tip of the side wall 41 is moved. It is made to contact | abut to the back surface 5a of the surface panel 5. FIG. Similarly, another anchor 1 is attached to a predetermined position of the surface panel 5.
Since the cap 21 is fixed to the pressing member 9 by screwing, the cap 21 can be easily attached and can be prevented from falling off the pressing member 9.
Each anchor 1 has substantially the same configuration, but the shape and size of the through hole 11 formed in the pressing member 9 are different depending on the place where the anchor 1 is disposed. That is, in the anchor 1 (see FIG. 2) shown in the C part of FIG. 4, the through holes 11 are long holes, and all the through holes 11 are long holes in the row of C parts in the longitudinal direction of the surface panel except the E part. It is said. In addition, the through holes are round holes in the D part and the A part of FIG. In addition, since the E part located in the center in the left-right and up-down direction of a surface panel becomes a fixing anchor, there is no clearance gap in a through hole (refer FIG. 3).
As described above, the long holes and the round holes depending on the attachment position are adapted to the displacement direction and the expected amount of displacement at each part due to thermal expansion. In addition, since all are the same structures except the shape of the through-hole 11 of the pressing member 9, the same components other than the pressing member 9 can be used for each anchor 1.
At the time of manufacturing the wall panel 3, the cushion material 37 is disposed in the through hole 11 of the pressing member 9 to fill the gap 35 between the retaining portion 39 and the pressing member 9, so that the anchor 1 is attached to the back surface 5 a of the front panel 5. Even if it is transported to the place where it is embedded in the concrete 7 after being mounted, or even when receiving the force when the concrete is poured into the formwork, the through-hole 11 of the pressing member 9 is filled with the cushion material 37. Therefore, the stud bolt 13, the receiver 15 and the retaining member 17 can be held at appropriate positions by the elastic force of the cushion material 37. Thus, by holding the stud bolt 13 (including the receiving member 15 and the retaining member 17 penetrating the stud bolt) in an appropriate position, the stud bolt 13 can be positioned at the approximate center of the through hole 11. In addition, since a space capable of relative movement can be secured, the relative displacement in the in-plane direction caused by the difference in thermal expansion between the surface panel and the concrete can be reliably absorbed.
In concrete casting, the surface panel 5 is placed in a mold with the anchor 1 attached to the surface panel 5 facing upward, and the concrete is poured into the mold. In this case, since the cap 21 is made of a resin material, the cap 21 does not corrode against the alkaline component of the concrete 7, so that the cap 21 and the front panel 5 can be prevented from being fixed due to corrosion.
In addition, since the cap 21 and the pressing member 9 are made of resin, the anchor 1 can be made lighter than those made of metal, and it is difficult to corrode against the alkali component of the concrete 7 and is fixed by corrosion. Therefore, the relative displacement in the in-plane direction caused by the difference in thermal expansion is surely absorbed.

Next, the thermal expansion of the wall panel 3 will be described. When relative displacement in the in-plane direction occurs due to the difference in thermal expansion between the front panel 5 and the concrete 7, the movable anchor 1 shown in FIGS. 17 is displaced, and the cushion material 37 buried in the gap 35 is deformed or crushed and relatively moves in the gap 35. At the same time, the gap 48 between the receiving member 15 and the side wall 41 of the cap 21 absorbs the relative displacement in the in-plane direction caused by the difference in thermal expansion between the surface panel and the concrete. In addition, the anchor 1 shown to E of FIG. 4 is a fixed anchor, and concrete 7 and the surface panel 5 relative displacement do not arise.
When a relative displacement in the in-plane direction occurs due to a difference in thermal expansion between the front panel 5 and the concrete 7, the stud bolt 13, the receiver 15, and the retaining member 17 are relatively displaced with respect to the pressing member 9 and the cap 12. However, since the pressing member 9 is a resin material, the retaining member 17 and the receiving member 15 in contact with the pressing member 9 are fixed by metal corrosion (corrosion and electric corrosion due to alkali components of concrete). Similarly, since the surface panel 5 and the cap 12 do not corrode and adhere to each other, the relative displacement between the surface panel 5 and the concrete 7 can be reliably absorbed.
Further, since the cap 21 and the pressing member 9 are made of heat-resistant resin, even when the heat of the front panel is received, it is possible to prevent the function of absorbing relative displacement from being damaged due to heat damage, for example, melting and fixing.
The receiver 15 is arranged on the back surface of the front panel and receives the front panel. For example, when the stress is generated on the front panel when the concrete is dried or due to thermal expansion or contraction, the surface of the receiver 15 does not exist. Although the panel may be deformed, in the present embodiment, since the receiving member 15 receives the back surface of the front panel, the deformation of the front panel 5 can be prevented when stress concentration occurs, and the appearance of the front panel is good. .
Furthermore, since the cap 21 and the pressing member are resin materials, the cap 21 and the pressing member are lighter than the metal material, and the weight of the entire wall panel can be reduced. In particular, in the present embodiment, since a large number of anchors 1 are attached, the influence of the weight on the entire wall panel is increased, so that the weight can be greatly reduced by using the cap 21 and the pressing member as a resin material.
According to the present embodiment, as described above, the corrosion due to the alkali component of the concrete, the adhesion due to the electric corrosion, and the damage of the surface panel due to the heat are prevented and the stud bolt is held in an appropriate position. The thermal expansion and contraction of the surface panel with respect to can be reliably absorbed.

  Next, a second embodiment of the present invention will be described with reference to FIG. In the embodiment described below, the same reference numerals are given to the portions having the same functions and effects as those of the above-described embodiments, and detailed description thereof is omitted. In the second embodiment, a part of the side wall 27 of the cap 21 is a separate body, and the side wall 27 is composed of a main body 27a and a contact member 27b made of a heat-resistant resin made of a different material. In addition, the contact member 27b has an elastic material, and the contact member 27b fills the gap 43 (see the first embodiment) between the support member 15 and the contact member 15b. In the present embodiment, a chloroprene rubber material is used for the contact member 27b as an elastic material made of heat-resistant resin. In the second embodiment, when the cap 21 moves relative to the receiver 15, the contact member 27b is elastically deformed or crushed to absorb the relative displacement between the cap 21 and the receiver 15. .

According to the second embodiment, the same effect as that of the first embodiment can be obtained, and the contact member 27b that can be elastically deformed at the contact portion between the front panel 5 and the side wall 41 of the cap 21. Therefore, the watertightness between the cap 21 and the panel 5 can be further increased, and the intrusion of the alkaline component of the concrete into the inner space of the cap 21 can be reliably prevented.
In the second embodiment as well, the through hole 11 of the pressing member 9 is a round hole or a long hole larger than the diameter of the stud bolt.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
The cushion material 19 may be a member having elasticity, and is not limited to foamed polyethylene, but may be another resin material.
The material of the front panel 5 is not limited to an aluminum alloy, and may be another metal material such as stainless steel.
The material of the pressing member 9 and the cap 21 is not particularly limited, and other heat resistant resin materials may be used.
The through-holes 11 formed in the holding member 9 are elongated holes in the anchors 1 in the same row as the fixed anchor 1 and in the longitudinal direction of the surface panel. However, all the anchors 1 may be round holes.
The retaining member 17 is not limited to a substantially circular shape in plan view, and may be any shape such as a hexagon.
The contact surface 30 between the retaining member 17 and the pressing member 9 and the contact surface 32 between the receiving member 15 and the pressing member 9 are each coated with a sliding material, but sandwiched between the receiving member 15 and the retaining member 17. By using the holding member 9 made of resin as a resin material, it is possible to make the holding member 15 and the retaining member 17 slip easily compared to the case where the holding member 9 is made of metal, and the relative variation of the surface panel 5 with respect to concrete. It is not necessary to coat the sliding material.
In the first embodiment, a cushion material or a rubber material may be disposed between the side wall 27 of the cap 21 and the receiving member 15.
In the second embodiment, the contact member 27b may form a gap between the receiving member 15 and the contact member 27b.

It is a figure of the A section and D section shown in Drawing 4, (a) is a longitudinal section and (b) is a BB sectional view of Drawing 1 (a). It is the figure of the C section shown in Drawing 4, and is a sectional view cut in the same position as BB shown in (a) of Drawing 1. It is the figure of E section shown in FIG. 4, and is sectional drawing cut | disconnected in the same position as BB shown to (a) of FIG. It is a front view of the wall panel using the anchor concerning an embodiment of the invention. It is the longitudinal cross-sectional view of the other part which attached the anchor concerning 2nd Embodiment to a surface panel.

Explanation of symbols

1 Anchor 5 Front panel 5a Back side (Back side of front panel)
7 Concrete 9 Holding member 11 Through hole 13 Stud bolt 15 Receiving member 17 Retaining member 19 Nut 21 Cap 27 Outer peripheral surface 29 Screw portion (screw portion of pressing member)
31 Center part 35 Crevice 37 Cushion material 39 Retaining part 41 Side wall (cap side wall)
45 Screw part 48 Crevice (gap between the receiver and the cap side wall)

Claims (2)

  A stud bolt fixed on the back surface of the front panel passes through the substantially central portion and is arranged on the back surface of the front panel to receive the back surface of the front panel in a substantially circular shape in plan view, and a substantially circular shape in plan view in contact with the back surface of the receiver A retaining member, a retaining member, a nut, and a substantially cylindrical cap embedded in concrete. The retaining member has a through hole through which a stud bolt penetrates at a substantially center and has a threaded portion on an outer peripheral surface. The retaining member has a central portion that contacts the back surface of the receiving member in the through hole of the pressing member and an outer peripheral portion that contacts the back surface of the pressing member, and a stud bolt passes through the central portion. Is fastened to the stud bolt on the back side of the retaining member, and the cap is made of heat-resistant resin and has a threaded portion that engages with the threaded portion of the retaining member on the inner peripheral surface of the side wall and prevents the concrete from coming off. Part contact stud bolt inside space on the rear surface of and sidewalls front panel has an outer surface and receptacle, the pressing member, retaining member, and the anchor, characterized in that housing the nut. The holding member is made of heat-resistant resin, and is provided with a cushioning material that fills the gap between the retaining member and the retaining member in the through hole of the retaining member, and the retaining member and the holder sandwich the retaining member and cap The anchor according to claim 1, wherein a gap is provided between the side wall and the receiving member.

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