JP7637978B2 - Expansion joint cover and reinforcing bracket - Google Patents

Description

The present invention relates to an expansion joint cover that covers the gap between adjacent panels and a reinforcing metal fitting used in the expansion joint cover.

Conventionally, expansion joints are known to be provided in gaps between structures to absorb displacement differences caused by vibrations during earthquakes, etc. (see, for example, Patent Document 1). These expansion joints are provided with cover members that cover the expansion joints exposed to the exterior walls, etc., and these cover members are also designed to be able to follow the displacement differences of the structure.

The expansion joint cover described in Patent Document 1 includes a support frame fixed to one structure with tapping screws, a decorative cover fixed to the support frame, a receiving frame fixed to the other structure with tapping screws, a holding member supported by the receiving frame so as to be slidable, and a cover member engaged with the holding member. As a result, when the structures are displaced relative to each other, the holding member moves relative to the receiving frame to follow the displacement difference.

JP 2004-162304 A

Incidentally, ALC (Autoclaved Lightweight Aerated Concrete) panels are sometimes used for the exterior walls of buildings. Because these ALC panels are thin, reinforcing metal fittings are placed between the panel and the supporting frame or receiving frame, and these reinforcing metal fittings are fixed to the structure (e.g. steel frame) on the inside of the panel.

However, in the case of the expansion joint cover described in Patent Document 1, when an earthquake or other event occurs, the behavioral characteristics of the rotational movement, etc. of the ALC panel as a structure differ slightly from the behavioral characteristics of the rotational movement, etc. of the steel frame, so there is a risk that cracks will develop in the tapping screw fixing parts of the ALC panel, leading to a decrease in durability.

Therefore, there is a demand for an expansion joint cover that has a simple structure yet enhances the durability of the panel, and for reinforcing metal fittings for use with the expansion joint cover.

The characteristic configuration of the expansion joint cover according to the present invention is an expansion joint cover that is supported by a structural frame and covers the gap between adjacent panels, and includes a reinforcing angle that is fixed to the structural frame and faces the back and side of the panel, a reinforcing bracket that is fixed to the reinforcing angle and faces the front and side of the panel, a support material that is fixed to the reinforcing bracket, and an exterior cover that is supported by the support material, and the reinforcing bracket has a bent plate portion that is bent from the side toward the front and a screw rod portion that protrudes from the bent plate portion to the side opposite the front, and the support material is fixed to the reinforcing bracket by a nut that is screwed into the screw rod portion.

In this configuration, a reinforcing bracket is fixed to a reinforcing angle fixed to the frame, and a support material is fixed to the reinforcing bracket, which supports the exterior cover. The reinforcing bracket in this configuration has a bent plate portion that is bent from the side of the panel toward the surface, and a threaded rod portion that protrudes from the bent plate portion to the side opposite the panel surface, and the support material is fixed to the reinforcing bracket by a nut that is screwed into the threaded rod portion.

In other words, the support material is not fixed to the panel with screws, but is fixed with a nut that is screwed into the screw rod of the reinforcing metal fitting, so the reinforcing metal fitting, support material, and exterior cover that are supported by the structure are separated from the panel. As a result, when an earthquake or other event occurs, the behavior characteristics of the rotational movement, etc. of the panel differ from the behavior characteristics of the rotational movement, etc. of the structure, but the reinforcing metal fitting, support material, and exterior cover follow the displacement of the structure independently of the displacement of the panel, so there is no damage to the panel.

Therefore, the expansion joint cover that covers the gap between adjacent panels can protect the panels for a long period of time. Moreover, since all that is required is to process the reinforcing metal fittings of the expansion joint cover, this expansion joint cover has a simple structure yet enhances the durability of the panels.

Another characteristic feature is that the reinforcing metal fittings are welded to the outer surface of the reinforcing angle.

As in this configuration, if the reinforcing bracket is welded to the outer surface of the reinforcing angle, the installation of the reinforcing bracket is easy.

Another characteristic feature is that the reinforcing angle further includes an engaging member that engages to cover the outer surface of the reinforcing angle, and the reinforcing metal fitting is fixed to the engaging member.

As in this configuration, by fixing the reinforcing metal fittings to the engaging member that engages with the reinforcing angle, the reinforcing metal fittings are supported by the main body, making construction easy even in site conditions where welding is not possible.

The reinforcing metal fitting according to the present invention is characterized in that it is a reinforcing metal fitting used in any of the expansion joint covers described above, and is equipped with the bent plate portion having an L-shaped cross section and the threaded rod portion having a male thread on the outer circumferential surface.

The reinforcing metal fittings in this configuration make it possible to provide an expansion joint cover that is simple in structure yet enhances the durability of the panel.

FIG. 4 is an enlarged perspective view showing a state in which a reinforcing metal fitting is attached to a panel. FIG. 4 is a side view of the expansion joint cover. FIG. 4 is a cross-sectional view of the expansion joint cover. FIG. FIG. FIG. 11 is a cross-sectional view of a support mechanism according to another embodiment (1). FIG. 11 is a cross-sectional view of an expansion joint cover according to another embodiment (2).

Below, an embodiment of the expansion joint cover and reinforcing metal fitting according to the present invention will be described with reference to the drawings. In this embodiment, an expansion joint cover 100 that covers the gap between adjacent ALC panels P, P will be described as an example (see FIG. 3). However, the present invention is not limited to the following embodiment, and various modifications are possible within the scope of the gist of the present invention.

As shown in Figure 1, multiple ALC panels P are stacked on the exterior wall of a building along the direction of gravity (the vertical direction in the drawing), and as shown in Figure 3, multiple ALC panels P are arranged in parallel along the horizontal direction. As shown in Figure 1, the building's framework is made up of multiple steel frames R (an example of a framework) made of H-shaped steel beams, and floor surfaces, etc. are formed by concrete slabs S supported by these steel frames R. Mortar M and insulating material I are filled between the concrete slabs S and the ALC panels P to ensure airtightness.

As shown in FIG. 2, the upper ALC panel P of a pair of ALC panels P, P aligned along the direction of gravity is supported by a support plate 12 welded to a long L-shaped ruler angle 11. The ruler angle 11 is welded to the top surface of the steel frame R. In addition, a sealant 13 and a joint material 14 are filled between the pair of ALC panels P, P aligned along the direction of gravity to prevent water from entering from the outside.

As shown in FIG. 3, the gap between a pair of ALC panels P, P arranged side by side in the left-right direction is covered with an expansion joint cover 100 to prevent water from entering from the outside. This expansion joint cover 100 includes an expansion joint section 2, an exterior cover 3, and a support mechanism 4 that supports the expansion joint section 2, and the exterior cover 3 is fixed to the expansion joint section 2 (rotating member 22) with multiple screws 31a.

The expansion joint section 2 has a receiving material 21, a rotating member 22, a torsion spring 23, and a waterproof sheet 24. The receiving material 21 is integrally formed with a fixed portion 21a that is fixed to a reinforcing metal fitting 42 described later, and a bent extension portion 21b that bends and extends outward from the fixed portion 21a. A long hole 21a1 that serves as a through hole is formed in the fixed portion 21a, and a holding recess 21b1 that holds one end of the torsion spring 23 and a fulcrum recess 21b2 that serves as a fulcrum for the rotating member 22 are formed at the end of the bent extension portion 21b. By forming the long hole 21a1 in the fixed portion 21a, construction errors between the receiving material 21 and the reinforcing metal fitting 42 can be absorbed.

The rotating member 22 has a plate-shaped body 22a, one end of which has a protruding fulcrum convex portion 22b that engages with the fulcrum concave portion 21b2, and the other end of the plate-shaped body 22a has a bent leg portion 22c that serves as a free end. The contact surface between the fulcrum concave portion 21b2 and the fulcrum convex portion 22b is curved. One end of the torsion spring 23 is supported by the retaining concave portion 21b1, and the other end of the torsion spring 23 is supported at the center of the plate-shaped body 22a, pressing the exterior cover 3 and the rotating member 22 toward the ALC panel P. With this configuration, the receiving material 21 supports the exterior cover 3 via the rotating member 22.

The waterproof sheet 24 is a flexible sheet material made of resin or the like, one end of which is sandwiched and fixed between the receiving material 21 and the reinforcing metal fitting 42, and the other end of which is fixed to the ALC panel P with a screw 24a. The exterior cover 3 has a cover body 31 with a U-shaped cross section, both ends of which are bent toward the ALC panel P, and gaskets 32, which are sealing materials, fixed to both ends of the cover body 31.

As shown in Figures 2 and 3, the support mechanism 4 includes a long L-shaped reinforcing angle 41 that is fixed to the steel frame R and faces the back surface Pc (inner surface) and side surface Pb of the ALC panel P, and a reinforcing metal fitting 42 with an L-shaped cross section that is fixed to the reinforcing angle 41 and faces the front surface Pa (outer surface) and side surface Pb of the ALC panel P. In this embodiment, the reinforcing metal fitting 42 is welded to the outer surface of the reinforcing angle 41.

As shown in Figures 1 and 2, the reinforcing angle 41 is welded to the ruler angle 11 and the fixing member 15 with an L-shaped cross section that is welded to the underside of the steel frame R. The fixing members 15 are dotted at the locations facing the reinforcing angle 41 and fixed to the steel frame R. The reinforcing angle 41 is a plurality of long steel members along the back surface Pc and side surface Pb of the ALC panel P, and each steel member is supported at two points by one ruler angle 11 and one fixing member 15. In addition, a gap is formed between the reinforcing angle 41 and the back surface Pc and side surface Pb of the ALC panel P to take into account construction errors (see Figure 3). It is not necessary to provide a gap between the reinforcing angle 41 and the back surface Pc and side surface Pb of the ALC panel P.

As shown in Figures 3 to 5, the reinforcing metal fitting 42 has a bent plate portion 42a with an L-shaped cross section that is bent from the side surface Pb of the ALC panel P toward the surface Pa, and a screw rod portion 42b that protrudes from the bent plate portion 42a to the side opposite the surface Pa of the ALC panel P and has a male thread on its outer circumferential surface.

The bent plate portion 42a is a plurality of steel plates welded and fixed on the outer surface of the reinforcing angle 41 (see also FIG. 1). The bent plate portion 42a is integrally formed with a rectangular plate 42a1 welded to the outer surface of the reinforcing angle 41 while facing the side surface Pb of the ALC panel P, and a bent plate 42a2 bent from the rectangular plate 42a1 in a direction facing the surface Pa of the ALC panel P. A tapped screw hole 42a3 is formed through the bent plate 42a2, and after a stud bolt is screwed into the screw hole 42a3, the peripheral portion of the screw hole 42a3 on the surface of the bent plate 42a2 is welded to form a screw rod portion 42b. Note that the screw rod portion 42b is not limited to a form formed by screwing and welding a stud bolt into the screw hole 42a3, and may be formed by either screwing a stud bolt into the screw hole 42a3 or welding a stud bolt to the bent plate 42a2. Additionally, the threaded rod portion 42b may be any threaded member into which the nut 51 is screwed, and is not limited to a stud bolt.

The screw rod portion 42b protrudes from the surface of the bent plate 42a2, but does not protrude from the back surface of the bent plate 42a2. With this configuration, when the reinforcing metal fitting 42 is welded and fixed to the reinforcing angle 41, the back surface of the bent plate 42a2 is in close proximity to the surface Pa of the ALC panel P. As shown in FIG. 3, the screw rod portion 42b is inserted into the long hole 21a1 of the receiving material 21, and a nut 51 is screwed through a washer 52 to fix the receiving material 21 to the reinforcing metal fitting 42.

As shown in the right side view, left side view, and plan view of FIG. 5, the screw rod portion 42b does not protrude from the back surface of the bent plate 42a2, but protrudes from the front surface of the bent plate 42a2. In addition, because the bent plate 42a2 is bent at a right angle from the rectangular plate 42a1, the bent plate 42a2 cannot be seen in the bottom view of FIG. 5, but can be seen in the front view and rear view of FIG. 5.

In this way, the expansion joint cover 100 in this embodiment has a reinforcing bracket 42 fixed to a reinforcing angle 41 fixed to the steel frame R via a ruler angle 11 and a fixing member 15, a support material 21 fixed to the reinforcing bracket 42, and the support material 21 supports the exterior cover 3. This reinforcing bracket 42 has a bent plate portion 42a bent from the side surface Pb of the ALC panel P toward the surface Pa, and a screw rod portion 42b protruding from the bent plate portion 42a to the side opposite the surface Pa of the ALC panel P, and the support material 21 is fixed to the reinforcing bracket 42 by a nut 51 screwed into the screw rod portion 42b.

In other words, the support material 21 is not fixed to the ALC panel P with screws, but is fixed with a nut 51 screwed onto the screw rod portion 42b of the reinforcing metal fitting 42, so the reinforcing metal fitting 42, support material 21, and exterior cover 3 supported by the steel frame R are separated from the ALC panel P (they are separate vibration systems). As a result, when an earthquake or the like occurs, the behavior characteristics of the rotational movement, etc. of the ALC panel P differ from the behavior characteristics of the rotational movement, etc. of the steel frame R, but the reinforcing metal fitting 42, support material 21, and exterior cover 3 follow the displacement of the steel frame R independently of the displacement of the ALC panel P, so the ALC panel P is not damaged.

In addition, when the steel frame R and the ALC panel P rotate during an earthquake or other event, the expansion joint 2 follows the rotation of the steel frame R with the fulcrum convex portion 22b of the rotating member 22 using the fulcrum concave portion 21b2 as a fulcrum. At this time, the torsion spring 23 presses the rotating member 22 and the exterior cover 3 toward the ALC panel P, so the sealing function of the gasket 32 is not impaired. Moreover, the other end of the waterproof sheet 24 is fixed to the ALC panel P with a screw 24a, but because this waterproof sheet 24 is a flexible resin sheet material, it deforms in response to the rotation of the ALC panel P and does not damage the ALC panel P.

Therefore, in this embodiment, the expansion joint cover 100 that covers the gap between adjacent ALC panels P, P can protect the ALC panel P for a long period of time. Moreover, since it is only necessary to process the reinforcing metal fittings 42 of the expansion joint cover 100, the expansion joint cover 100 has a simple structure but enhances the durability of the ALC panel P. In addition, since the reinforcing metal fittings 42 are welded and fixed to the outer surface of the reinforcing angle 41, the installation of the reinforcing metal fittings 42 is easy.

[Other embodiments]
(1) As shown in FIG. 6, the support mechanism 4 may further include an engagement member 43 that is engaged so as to cover the outer surface of the reinforcing angle 41. The reinforcing metal fitting 42 in this embodiment is fixed to the engagement member 43 by a bolt B and a fixing nut N. This bolt B is configured as a stud bolt that is screwed into a hole formed by tapping the rectangular plate 42a1, similar to the above-mentioned screw rod portion 42b, and is welded and fixed to the reinforcing metal fitting 42. Note that the bolt B is not limited to a form formed by screwing and welding the stud bolt into a hole formed by tapping the rectangular plate 42a1, and may be formed by either screwing the stud bolt into the hole or welding the stud bolt to the rectangular plate 42a1. In addition, the bolt B may be a threaded member that can be screwed into the fixing nut N, and is not limited to a stud bolt.

The engaging member 43 is configured with an L-shaped cross section, and has a notched piece 43a formed by cutting out one end to clamp one end of the reinforcing angle 41, and a long hole 43b into which a bolt B is inserted at the other end. This long hole 43b can absorb the construction error between the engaging member 43 and the reinforcing metal fitting 42. The bent plate portion 42a of the reinforcing metal fitting 42 has a bent portion 42c formed by bending the end of the rectangular plate 42a1 inwardly into an L-shaped cross section, and the other end of the reinforcing angle 41 is clamped between this bent portion 42c and the engaging member 43. The other configuration is the same as in the above-mentioned embodiment, so the description will be omitted. As in this embodiment, if a bolt B is inserted into the long hole 43b of the engaging member 43 that engages with the reinforcing angle 41 and a fixing nut N is screwed onto the bolt B to support the reinforcing metal fitting 42 on the steel frame R via the engaging member 43 and the reinforcing angle 41, construction is easy even in field conditions where welding is not possible. Alternatively, the fixing nut N may be welded to the engaging member 43, a sharp claw portion may be formed at the tip of the bolt B that is screwed into the fixing nut N, and the sharp claw portion may be caused to bite into the outer surface of the reinforcing metal fitting 42, thereby fixing the engaging member 43 and the reinforcing metal fitting 42 together.

(2) The ALC panel P may be another panel such as an ECP (Extruded Cement Panel). As shown in Fig. 7, even in the case of an ECP, an expansion joint cover 100 covering the gap between adjacent panels P, P includes a reinforcing angle 41 fixed to the framework and facing the back surface Pc and side surface Pb of the panel P, a reinforcing metal fitting 42 fixed to the reinforcing angle 41 and facing the front surface Pa and side surface Pb of the panel P, a support member 21 fixed to the reinforcing metal fitting 42, and an exterior cover 3 supported by the support member 21. The reinforcing metal fitting 42 has a bent plate portion 42a bent from the side surface Pb toward the front surface Pa and a screw rod portion 42b protruding from the bent plate portion 42a to the opposite side to the front surface Pa. The support member 21 is fixed to the reinforcing metal fitting 42 by a nut 51 screwed into the screw rod portion 42b. In the present embodiment, since the ECP is a hollow panel P, it is preferable that the expansion joint cover 100 is provided with a reinforcing angle 41 and a reinforcing metal fitting 42 on both adjacent panels P, P, and the other end of the waterproof sheet 24 is sandwiched between the reinforcing metal fitting 42 and the nut. In addition, it is preferable to provide a clearance between the reinforcing metal fitting 42 and the panel P (ECP) in consideration of the deformation amount of the ECP due to wind pressure.
(3) The structure of the building is not limited to steel frame R, but may be other structures such as concrete slab S.

The present invention can be used for expansion joint covers that cover the gaps between adjacent panels and for reinforcing fittings used in expansion joint covers.

3: Exterior cover 21: Support material 41: Reinforcement angle 42: Reinforcement metal fitting 42a: Bent plate portion 42b: Screw rod portion 51: Nut 100: Expansion joint cover P: ALC panel (panel)
R: Steel frame (structure)

Claims (3)

An expansion joint cover that is supported by a structure and covers the gap between adjacent panels,
A reinforcing angle fixed to the body and facing the back surface and side surface of the panel;
A reinforcing metal fitting fixed to the reinforcing angle and facing the front surface and the side surface of the panel;
A receiving member fixed to the reinforcing metal fitting;
An exterior cover supported by the receiving material,
the reinforcing metal fitting has a bent plate portion bent from the side surface toward the front surface, and a screw rod portion protruding from the bent plate portion to a side opposite the front surface,
The receiving member is fixed to the reinforcing metal fitting by a nut that is screwed onto the threaded rod portion ,
The reinforcing metal fitting is an expansion joint cover welded to the outer surface of the reinforcing angle . An expansion joint cover that is supported by a structure and covers the gap between adjacent panels,
A reinforcing angle fixed to the body and facing the back surface and side surface of the panel;
An engagement member that is engaged so as to cover an outer surface of the reinforcing angle ;
Reinforcing metal fittings facing the front surface and the side surface of the panel;
A receiving member fixed to the reinforcing metal fitting;
An exterior cover supported by the receiving material,
the reinforcing metal fitting has a bent plate portion bent from the side surface toward the front surface, and a screw rod portion protruding from the bent plate portion to a side opposite the front surface,
The receiving member is fixed to the reinforcing metal fitting by a nut that is screwed onto the threaded rod portion,
The reinforcing metal fitting is an expansion joint cover fixed to the engaging member. A reinforcing metal fitting used in the expansion joint cover according to claim 1 or 2 ,
A reinforcing metal fitting comprising the bent plate portion having an L-shaped cross section and the screw rod portion having a male thread on its outer circumferential surface.

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