Clip Nut and Building Panel

Abstract

To provide a building panel constructed by embedding a stiffening rail made of hat-shaped steel on the back side of a precast molded plate so that the bottom part rises from the back surface of the precast molded plate, in which a nut member for connecting the building panel to the building frame is easily and accurately attached to the stiffening rail.SOLUTION: A rectangular window hole 24 and a circular connecting hole 25 are formed at predetermined locations on a bottom part 22 of a stiffening rail 20. A clip nut including a nut member 40, a nut support plate 5 connected near one end to an open end of the nut member 40, and a clip part 6 provided at the other end of the nut support plate 5 and opening toward the nut member 40 is inserted into the groove of the bottom part 22 through the window hole 24 of the stiffening rail 20, and the opening edge of the window hole 24 is clamped by the clip part 6, so that the opening end of the female screw hole of the nut member 40 is held so as to face the connecting hole 25.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present application relates to a clip nut for connecting a building panel with a stiffening rail embedded on the back side of a precast forming plate to a building frame, and a building panel with the clip nut attached to the stiffening rail.

Background Art

[0002] The applicant of the present application has developed and disclosed in Patent Document 1 an outer wall panel in which a profiled steel is embedded on the back side of a precast forming plate as a building panel that can be used for the curtain wall outer wall of a three-story steel-frame house, etc. As shown in FIG. 12, the outer wall panel 1 has a hat-shaped steel stiffening rail (described as a "grooved frame material" in the document) 2 attached to the back side of a precast forming plate (described as a "concrete single plate" in the document) 12 in which a single-layer mesh reinforcing bar 11 is embedded. The stiffening rail 2 has a flange portion (the flange portion of the hat) 21 that projects outward and is welded to the mesh reinforcing bar 11, and a bottom portion (the top surface portion of the hat) 22 that surrounds the U-shaped groove portion is embedded in the concrete so as to float from the back surface of the precast forming plate 12.

[0003] A nut member (described as an "insert nut" in the document) 4 for connecting the outer wall panel 1 to a beam of the building frame, etc. is attached to the groove of the stiffening rail 2. This nut member 4 is a high nut with one end being a closed end, and is fixed in advance by welding in the groove of the stiffening rail 2 so that the opening end of the screw hole faces the opening 23 formed in the bottom portion 22 of the stiffening rail 2, and the closed end is embedded in the concrete. By adopting such a configuration, an outer wall panel 1 with a thin material thickness, excellent strength, and easy connection to the building frame can be obtained.

[0004] In addition, the applicant of the present application has also disclosed in Patent Document 2 a floor panel having a cross-sectional structure similar to that of the outer wall panel 1.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the outer wall panel 1 described in Patent Document 1 in which the reinforcing rail 2 made of hat-shaped steel is embedded on the back side of the precast molding plate, before placing the concrete in the formwork, it is necessary to attach the nut member 4 to a predetermined position of the reinforcing rail 2 or the mesh reinforcing bar 11. However, since welding work is required for the attachment, it takes a lot of processing time. Moreover, it is also necessary to ensure sufficient fixing strength when welding the nut member 4 so that the position and posture of the nut member 4 do not shift due to the placement of the concrete.

[0007] The invention disclosed in the present application has been made to improve such a situation, and relates to building panels such as outer wall panels and floor panels, which are configured by embedding a reinforcing rail made of hat-shaped steel in a concrete single plate or other precast molding plates. The purpose is to enable anyone to easily and firmly attach the nut member for connecting the building panel to the building frame to an appropriate position without welding to the reinforcing rail.

[0008] In addition, the invention disclosed in the present application proposes a practical configuration of a building panel in which such a nut member is attached to a reinforcing rail.

Means for Solving the Problems

[0009] To achieve the above object, the clip nut according to the invention disclosed in the present application comprises a nut member having a female screw hole, a nut support plate having one end near the opening end of the female screw hole coupled so as to be orthogonal to the axis of the nut member, and a clip portion provided at the other end of the nut support plate. The clip portion is located on the opposite side of the nut member across the nut support plate and is formed so as to open a clamping piece toward the nut member side, adopting such a basic configuration.

[0010] In the clip nut according to this basic configuration, the nut support plate and the clip portion can be integrally formed by folding back a single thin steel plate having spring elasticity.

[0011] Regarding the coupling portion between the nut member and the nut support plate, a short cylindrical caulking portion protrudes from the seating surface at the opening end of the female screw hole of the nut member, and the caulking portion is inserted into a hole formed in the nut support plate and crimped, or it can be coupled to the nut support plate by fitting a caulking washer.

[0012] The building panel to which the clip nut is applied is a building panel in which a stiffening rail made of hat-shaped steel is attached such that its bottom surface floats from the back surface of the precast molded plate. At a predetermined position on the bottom surface of the stiffening rail, a rectangular window hole and a circular connection hole are formed at a predetermined interval. The clip nut is inserted through the window hole of the stiffening rail into the gap between the bottom surface and the precast molded plate, and the clip portion clamps the opening edge of the window hole, so that the female screw hole of the nut member faces the connection hole and is held in this state, which is characterized thereby.

[0013] In the building panel according to this configuration, a short cylindrical caulking portion protrudes from the seating surface at the opening end of the female screw hole of the nut member, and the caulking portion is inserted into and crimped into a hole formed in the nut support plate, or is coupled to the nut support plate by fitting a caulking washer, and the caulking portion of the nut member is configured to fit into and be held in a connection hole formed in the bottom surface portion of the stiffening rail.

[0014] Further, the clip nut is provided with a pressing piece formed by punching out the nut support plate and bent toward the nut member side, and it is more preferable that the nut member is pressed against the bottom surface portion of the stiffening rail by the pressing piece provided on the nut support plate coming into contact with the back surface of the precast molded plate.

[0015] Also, the building panel can be configured such that the opposite side of the opening end of the nut member is held in a state of being embedded in the precast molded plate.

Advantages of the Invention

[0016] By using the clip nut configured as described above, the nut member can be easily and firmly attached to the correct position with respect to the bottom surface portion of the hat-shaped steel embedded in the precast molded plate without welding and without the need for special tools or the like.

[0017] Also, by adopting a configuration in which a rectangular window hole and a circular connection hole are formed in the bottom surface portion of the stiffening rail, the clip nut is inserted into the groove of the stiffening rail through the window hole, and the opening edge of the window hole is clamped by the clip portion of the clip nut, the opening end of the nut member can be accurately held so as to face the connection hole of the stiffening rail. Furthermore, the space for attaching the nut member to the stiffening rail can be compactly accommodated.

[0018] By adopting the building panel configured in this way, the workability in manufacturing the building panel and connecting it to the frame can be significantly improved.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Embodiments for Carrying Out the Invention

[0020] Hereinafter, embodiments of the invention disclosed in the present application will be described with reference to the drawings. In the following, when explaining the relative positional relationship and the direction of movement of parts and members, the manufacturing stage of the building panel, that is, with the design surface of the building panel facing down and the back surface facing up, the auxiliary stiffening rail is assembled on the back surface side, and the vertical direction (thickness direction) is specified based on the posture when placing concrete in the formwork in that state. Also, for convenience, the long side direction of the building panel will be referred to as the vertical direction (height direction), and the short side direction will be referred to as the horizontal direction (width direction).

[0021] Also, components having substantially the same functions or actions in a plurality of embodiments are assigned the same numerical reference signs to simplify the redundant description in the embodiments described later. When distinguishing or comparing a specific component in the above-described embodiment and a similar component in the embodiment described later, a capital alphabet (A, B,...) is appended to the numerical reference sign corresponding to the component, but the basic concept regarding the component having the same numerical reference sign is common throughout each embodiment.

[0022] <Building Panel> Figure 1 shows the basic configuration of a building panel 10 to which a clip nut according to the invention disclosed in the present application is attached. The building panel 10 is formed by attaching two stiffening rails 20 made of hat-shaped steel in the long side direction to the back side of a precast molding plate 12 in which a single-layer mesh reinforcing bar 11 is embedded. The stiffening rail 20 is such that a flange portion 21 projecting outward is welded to the mesh reinforcing bar 11, and a bottom portion 22 surrounding a U-shaped groove portion is embedded in the concrete so as to float from the back surface of the precast molding plate 12. These configurations are substantially the same as those of the outer wall panel 1 described in Patent Document 1. However, in the invention disclosed in the present application, in order to attach a clip nut described below to the stiffening rail 20, a rectangular window hole 24 and a circular connecting hole 25 are formed at predetermined intervals (for example, near both ends and the middle portion) in the bottom portion 22 of the stiffening rail 20. Both the window hole 24 and the connecting hole 25 are arranged on the center line in the width direction of the stiffening rail 20. The rectangular window hole 24 is formed with its long side facing the material axis direction of the stiffening rail 20. This window hole 24 is also used as a latching portion when the building panel 10 is lifted and transported by a crane or the like.

[0023] <First Embodiment> Figures 2 to 6 show the configuration of a clip nut 3A according to the first embodiment of the invention disclosed in the present application and the mounting form with respect to the stiffening rail 20. The clip nut 3A basically includes a nut member 40 having a female screw hole, a nut support plate 5 having one end near the opening end of the female screw hole of the nut member 40 connected thereto, and a clip portion 6 provided at the other end of the nut support plate 5.

[0024] The nut member 40 in the exemplary embodiment is a hexagonal nut having openings at both ends in the axial direction and having a standard or lower height. In this specification, in order to distinguish it from a high nut described later, the nut member 40 according to this embodiment, including those having a standard height, is referred to as a "low nut 41". A short cylindrical caulking portion (not shown) projects from the seating surface of this low nut 41.

[0025] In the exemplary embodiment, the nut support plate 5 is formed of a thin steel plate having a substantially uniform width and spring elasticity. The width dimension of the thin steel plate is set to be slightly smaller than the short side dimension of the rectangular window hole 24 formed in the stiffening rail 20.

[0026] Near one end of the nut support plate 5, a circular hole (not shown) is formed, and the caulking portion of the low nut 41 is inserted into the hole and caulked and crimped, or a caulking washer 42 is fitted onto the caulking portion from above the nut support plate 5. By such caulking joining, near one end of the nut support plate 5 is coupled to the open end of the low nut 41 so as to be orthogonal to its axis. Further, the vicinity of both side edges of the low nut 41 on the nut support plate 5 is cut and bent downward to sandwich the two opposing side surfaces of the low nut 41, thereby forming a rotation prevention 51 around the low nut 41.

[0027] Note that, for the connection between the low nut 41 and the nut support plate 5, caulking forms of nuts such as clinch nuts (self-clinching nuts), carina nuts, nuts with skirts, press-fit nuts, rolled thread nuts, etc., which are in circulation under such names, can also be adopted.

[0028] In the exemplary embodiment, the clip portion 6 is integrally formed with the nut support plate 5 by extending the other end of the thin steel plate constituting the nut support plate 5 and folding it back upward. The clamping piece 61 formed by the folding is located on the opposite side of the low nut 41 with the nut support plate 5 interposed therebetween and opens toward the low nut 41 side. At the tip of the clamping piece 61, a receiving lip 62 is formed by folding up the edge obliquely upward.

[0029] Furthermore, in the exemplary embodiment, in the vicinity of the low nut 41 on the nut support plate 5, a pressing piece 52 is provided which is formed by punching and bending the nut support plate 5 into a substantially U-shape in a top view. The pressing piece 52 extends obliquely downward toward the other end side of the nut support plate 5 with the low nut 41 side as a base point, and its extending end is spaced apart from the nut support plate 5 by a distance greater than the height of the low nut 41.

[0030] The clip nut 3A configured as described above is inserted into the gap between the bottom surface portion 22 of the stiffening rail 20 and the precast forming plate 12 from the rectangular window hole 24 formed in the stiffening rail 20 with the low nut 41 side first, as shown in FIGS. 3 to 5. When the clip nut 3A is advanced as it is, the opening edge of the window hole 24 is clamped by the clip portion 6 and hits the folded-back portion of the clip portion 6 and stops. At this time, the open end (caulking portion or caulking washer 42) of the low nut 41 fits exactly into the connecting hole 25 formed in the stiffening rail 20 and is held so that the female screw hole at the open end faces. That is, as shown in FIG. 4, the dimension P from the axis of the low nut 41 to the folded-back portion of the clip portion 6 is set to match the dimension Q from the opening edge of the window hole 24 to the center of the connecting hole 25 in the stiffening rail 20. The pressing piece 52 formed on the nut support plate 5 elastically abuts against the back surface of the precast forming plate 12 and presses the low nut 41 against the bottom surface portion 22 of the stiffening rail 20 by its repulsive force.

[0031] The building panel 10 with the clip nut 3A attached to the stiffening rail 20 in this way is built into the building frame as shown in FIG. 6, for example, and is connected to a substantially groove-shaped building panel mounting rail 94 attached to the flange 93 of the steel beam by fastening a hook-shaped building panel mounting fitting 91 or the like to the low nut 41 with a bolt 92.

[0032] <Second Embodiment> FIGS. 7 to 11 show the configuration of the clip nut 3B according to the second embodiment of the invention disclosed in the present application and the mounting form with respect to the stiffening rail 20.

[0033] The clip nut 3B according to this embodiment also basically includes a nut member 40, a nut support plate 5 having one end near the opening end of the female screw hole of the nut member 40 connected thereto, and a clip portion 6 provided at the other end of the nut support plate 5. However, in this embodiment, a high nut 43 with a closed end on the opposite side of the opening end is adopted for the nut member 40. Regarding the joining form between the open end of the high nut 43 and the nut support plate 5, the same caulking form as in the first embodiment can be adopted.

[0034] This clip nut 3B that employs the high nut 43 for the nut member 40 is attached to the stiffening rail 20 before the concrete of the precast forming plate 12 is placed. That is, as shown in FIGS. 8 to 10, from the window hole 24 of the stiffening rail 20 welded to the mesh reinforcing bar 11 (not shown in FIG. 8), with the high nut 43 side first, it is inserted into the groove of the stiffening rail 20. When the clip nut 3B is advanced as it is, the opening edge of the window hole 24 is clamped by the clip portion 6 and abuts against the folded-back portion of the clip portion 6 and stops. At this time, the open end (crimping portion or crimping washer 42) of the high nut 43 just fits into the connection hole 25 formed in the stiffening rail 20 and is held so as to face the female screw hole at the open end. When concrete is placed in the formwork in that state, the closed end of the high nut 43 is held in a state of being embedded in the precast forming plate 12.

[0035] Therefore, in this second embodiment, there is no meaning in providing the pressing piece 52 as in the first embodiment on the nut support plate 5. However, for the purpose of sharing members, there is no particular inconvenience even if a thin steel plate having the same processing form as in the first embodiment is adopted for the nut support plate 5 of the second embodiment.

[0036] In this way, the clip nut 3B is attached to the stiffening rail 20 before the concrete is placed, and the building panel 10 in which the high nut 43 is partially embedded in the precast forming plate 12 is also built into the structure as shown in FIG. 11 and connected to the structure in exactly the same manner as in the first embodiment.

[0037] As described above by showing and explaining two embodiments, by using the clip nuts 3A and 3B according to the invention disclosed in the present application, the nut member 40 (low nut 41, high nut 43) can be firmly attached to the bottom surface portion 22 of the stiffening rail 20 embedded in the precast forming plate 12 at an appropriate position easily by anyone without welding and without the need for special tools or the like. Since the clip portion 6 has appropriate elasticity, it can be attached without difficulty even if the plate thickness of the stiffening rail is somewhat different.

[0038] Further, a rectangular window hole 24 and a circular connection hole 25 are formed in the bottom surface portion 22 of the stiffening rail 20. By inserting the clip nuts 3A and 3B into the groove of the stiffening rail 20 through the window hole 24 and adopting a configuration in which the opening edge of the window hole 24 is clamped by the clip portion 6, the opening end of the female screw hole of the nut member 40 can be accurately held so as to face the connection hole 25 of the stiffening rail 20, and the space for attaching the nut member 40 to the stiffening rail 20 can be compactly accommodated.

[0039] And by adopting the building panel 10 configured in this way, the workability in manufacturing the building panel 10 and connecting it to the building frame can be significantly improved.

[0040] In particular, the clip nut 3A of the first embodiment having the low nut 41 is attached to the stiffening rail 20 after the stiffening rail 20 is embedded in the concrete. Therefore, for example, if the nut member 40 (low nut 41) is not arranged in the connection hole 25 used for connection to the building frame, the nut member 40 (low nut 41) is arranged in the wrong connection hole 25, or the attached clip member interferes with other members, even if an unexpected situation occurs at the construction site, the clip nut 3A can be retrofitted or replaced on the spot.

[0041] It should be noted that the technical scope of the invention disclosed in the present application should not be construed limitedly by the illustrated embodiments, but should be construed conceptually based on the description in the claims. When implementing the invention disclosed in the present application, the shape, structure, material, quantity, joining form, relative positional relationship, etc. of the components not specifically specified in the claims can be appropriately modified within the range where substantially the same or better operational effects as the illustrated embodiments can be obtained.

[0042] For example, the nut support plates 5 and the clip portions 6 of the clip nuts 3A and 3B are not limited to being integrally formed by a single thin steel plate, and may be formed by combining two members. Further, the pressing piece 52 of the clip nut 3A shown in the first embodiment is not limited to being punched out in a substantially U-shape from the nut support plate 5 as long as it can exert an appropriate reaction force toward the precast forming plate 12, and can also be formed by appropriate punching or cutting processes, etc., or by attaching another elastic member to the nut support plate 5. If the nut support plate 5 is firmly held along the bottom surface portion 22 of the stiffening rail 20 only by the clamping force of the clip portion 6, the pressing piece 52 may not be provided. Further, the high nut 43 of the clip nut 3B shown in the second embodiment may be in a form in which the opposite side of the open end is not closed.

Industrial Applicability

[0043] The invention disclosed in the present application can be widely used in connection parts of various building members such as embedding hat-shaped steel in precast molded bodies, including outer wall panels, floor panels, and other building panels.

Explanation of Reference Numerals

[0044] 10 Building panel 11 Mesh reinforcing bar 12 Precast forming plate 20 Stiffening rail 21 Flange portion 22 Bottom surface portion 24 Window hole 25 Connection hole 3A, 3B Clip nut 40 Nut member 41 Low nut 42 Caulking washer 43 High nut 5 Nut support plate 51 Anti-rotation 52 Pressing piece 6 Clip portion 61 Clamping piece 62 Receiving lip 91 Building panel mounting fixture 92 Bolt 93 Flange of steel frame beam 94 Building panel mounting rail

Claims

1. In a building panel in which a reinforcing rail made of a hat-shaped steel is attached to the back side of a precast forming plate such that the bottom surface portion thereof floats from the back surface of the precast forming plate, a rectangular window hole and a circular connection hole are formed at a predetermined interval at a predetermined location on the bottom surface portion of the reinforcing rail, It comprises a nut member having a female screw hole, a nut support plate having one end portion near the opening end of the female screw hole coupled thereto so as to be orthogonal to the axis of the nut member, and a clip portion provided at the other end of the nut support plate. The clip portion is located on the opposite side of the nut member with the nut support plate interposed therebetween, and a clip nut formed so as to open a clamping piece toward the nut member side is inserted into the gap between the bottom surface portion and the precast forming plate through the window hole of the reinforcing rail, and the clip portion clamps the opening edge portion of the window hole, whereby the female screw hole of the nut member is held so as to face the connection hole. A building panel characterized by the above.

2. In the building panel according to Claim 1, a short cylindrical caulking portion protrudes from the seating surface at the opening end of the female screw hole of the nut member, the caulking portion is inserted into a hole formed in the nut support plate and crimped, or is coupled to the nut support plate by fitting a caulking washer, and the caulking portion of the nut member fits into and is held in the connection hole formed in the bottom surface portion of the reinforcing rail. A building panel characterized by the above.

3. In the building panel according to Claim 1 or 2, a pressing piece formed by punching out the nut support plate and bent toward the nut member side is provided, and the pressing piece abuts against the back surface of the precast forming plate, whereby the nut member is pressed against the bottom surface portion of the reinforcing rail. A building panel characterized by the above.

4. In the building panel according to Claim 1, 2 or 3, The opposite side of the open end of the nut member is held in a state of being embedded in the precast molding plate. A building panel characterized by this.

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