JP7601674B2 - Panel frame - Google Patents

Description

The present invention relates to panel frames such as soundproofing panels that are erected along roads such as general roads and expressways to insulate against noise and prevent the transmission of noise to nearby areas, and more specifically to a panel frame in which the frame body undergoes plastic deformation to absorb impact forces when an impact force due to an accident or the like acts on the plate material.

In this type of soundproofing panel, the soundproofing plate that blocks noise is often a translucent plate made of a resin plate such as a polycarbonate plate or an acrylic plate that transmits visible light so that the outside of the panel can be seen. When a load or the like falls from a vehicle and an impact force acts on the soundproofing panel with such a translucent plate made of a resin plate embedded in it, there is a risk that the translucent plate will break. In particular, if the translucent plate is completely fixed to the frame in which it is embedded, the impact force is concentrated on one part of the panel, making the translucent plate prone to break, and there is a concern that an accident in which large fragments fall may occur. In addition, there is a problem that the translucent plate may come off the frame due to the impact force, exposing the edge of the translucent plate and causing danger, or the translucent plate may break and cause fragments to fly, expanding the disaster.

To solve this problem, for example, Patent Document 1 discloses a panel mounting structure in which only one side of a panel 2 of a translucent panel is firmly fixed to a mounting frame 3 via a mounting fixture 5 that penetrates the panel 2, and the other three sides are configured to be easily detached from the mounting frame 3 by a clamping member 4, thereby dissipating the impact force on the panel 2 and preventing the translucent panel from being destroyed (see paragraphs [0007] to [0011] of the specification of Patent Document 1, Figure 4 of the drawings, etc.).

Patent document 2 also discloses a panel structure for a soundproof wall in which a frame 2 is attached to the four periphery of a resin plate 1, one side 21 and at least one other side 22 are locked to the frame by locking means 3, and the locking force of the side 21 is stronger than that of at least the other side 22, so that when external pressure is applied to the panel, the panel opens like a curtain, leaving only the side 21 with the stronger locking means (see claim 1 in the claims of patent document 2, paragraphs [0014] to [0019] of the specification, and Figures 1 to 4 of the drawings, etc.).

However, the panel mounting structure of Patent Document 1 and the sound insulation wall panel structure of Patent Document 2 are structured so that when an impact force is applied to the panel, the light-transmitting plate made of a resin plate such as polycarbonate detaches from the frame body on three sides except for the top side like a curtain. This means that there is a risk that an impacting object such as cargo from a vehicle or flying debris will fall outside the sound insulation wall through the open area caused by the detachment of the light-transmitting plate.

In addition, the panel mounting structure of Patent Document 1 and the sound insulation wall panel structure of Patent Document 2 require drilling holes in the resin plate of the light-transmitting panel, which poses the problem of time and effort required for processing the resin plate and assembling the panels. Furthermore, there is also the problem that a light-transmitting panel with three sides detached from the frame is left hanging in the air until it is replaced, which can be dangerous as it can be blown around by the wind.

On the other hand, when a glass plate made of quartz glass or the like is used for the light-transmitting plate of a light-transmitting panel, rather than a resin plate, the tensile strength of glass is low and it does not bend, so the method of opening it by detaching three sides like a curtain cannot be used. Therefore, when using a glass plate for the light-transmitting plate, a countermeasure has been proposed in which the frame of the light-transmitting plate that secures the light-transmitting plate is made as a separate part from the main frame, which is the overall frame, so that the frame of the light-transmitting plate will fall off the main frame when an impact force is applied.

For example, Patent Document 3 discloses a soundproof panel 1 using a light-transmitting plate, in which an inner frame 3 is fitted to an outer frame, the peripheral portion of a light-transmitting material 4 is attached to the inner frame 3 so as to be supported via an elastic seal material 33, one side of the inner frame 3 is pinned to one side of the outer frame, and the other side of the inner frame 3 is joined to the other side of the outer frame by a joining means having lower strength than the side to which the pin is fixed, and when an impact force is applied from the front side of the inner panel 5, the impact force separates the other side of the inner frame 3 from the outer frame at the low-strength joint to the rear side, and the inner frame 3 rotates to the rear side around the side to which the pin is fixed (see claim 1 of Patent Document 3, paragraphs [0012] to [0029] of the specification, and Figures 11 and 12 of the drawings).

However, the soundproof panel 1 of Patent Document 3 is also configured so that the inner frame 3 falls off the outer frame 2 when an impact force is applied, and so, just like the panel mounting structure of Patent Document 1 and the soundproof wall panel structure of Patent Document 2, there is a problem in that an impacting object such as cargo from a vehicle or flying debris may fall outside the soundproof wall through the open area where the light-transmitting plate is detached.

The soundproof panel 1 in Patent Document 3 has a double structure consisting of an outer frame 2 and an inner frame 3, which means that the panel is made up of many parts, and there is also the problem that it takes time to assemble the panel. Furthermore, the soundproof panel 1 in Patent Document 3 also has the problem that the inner frame 3 is suspended in the air until it is replaced, which can be dangerous as it can be blown around by the wind.

Japanese Patent Application Publication No. 04-302608 JP 2001-193026 A JP 2012-211434 A

The present invention was devised in consideration of the above-mentioned problems, and its purpose is to provide a panel frame that has a cross-sectional performance capable of withstanding wind loads with an inexpensive and simple structure, and in the event of an impact load, either the upper or lower frame undergoes plastic deformation to release the impact load and prevent damage to the plate material.

The panel frame of the first invention is a panel frame comprising a plate material and a frame body into which the plate material is fitted, the frame body having a pair of upper and lower horizontal frames and a pair of left and right vertical frames, a cross-sectional defect portion being provided outside the plate material of either or both of the pair of upper and lower horizontal frames, a hollow cross section being formed outside the plate material in the plastically deformable horizontal frames, the cross-sectional defect portion being provided in the hollow cross section, and the cross-sectional defect portion being a through hole that vertically penetrates the upper and lower surfaces of the hollow cross section .

The panel frame according to the second invention is the first invention, characterized in that the plate material is inserted and clamped in a mounting groove formed in the frame body without a hole being formed through which a fixing member that fixes the plate material to the frame body can be inserted.

The panel frame of the third invention is characterized in that, in the first or second invention, the cross-sectional loss portions are provided symmetrically in multiple positions with the longitudinal direction of the horizontal frame that plastically deforms being the left-right direction.

According to the first to third inventions, the panel frame has a cross-sectional performance capable of withstanding the wind load as a design load with an inexpensive and simple structure, and when an impact load is applied, either or both of the upper and lower frames are plastically deformed to release the impact load, so that even if an impact force is applied, the plate material can be prevented from being damaged. Also, according to the first to third inventions, even if an impact force is applied, the plate material of the panel frame remains attached to the frame body, and the plate material does not come off the frame body and become suspended, so that the risk of an impacting object such as cargo from a vehicle or flying objects falling to the outside from the open space can be reduced. In addition, according to the first to third inventions, the plate material does not come off the frame body and become suspended, so that the structure is stable and safe until the deformed panel frame is replaced.
Furthermore, according to the first to third inventions, a hollow cross-section is formed outside the plate material, so that even when the frame body is plastically deforming, the hollow cross-section has high bending rigidity (EI: Young's modulus x second moment of area) and can prevent the plate material from detaching from the frame body.
Furthermore, according to the first to third inventions, the cross-sectional defect portion is a hole formed on the upper and lower surfaces of the hollow cross section, so not only is there no risk of noise leaking from the hole in the cross-sectional defect portion, but when an impact force is applied, the horizontal frame tears off from the through hole and undergoes plastic deformity, thereby improving the impact energy that can be absorbed.

In particular, according to the second invention, since no holes are formed in the plate material for inserting fixing members such as bolts or pins, the effort of forming holes in the plate material is eliminated, and the panel frame can be manufactured inexpensively. Also, according to the second invention, since the plate material is inserted into the mounting groove and clamped, unlike conventional fixing methods using bolts or rivets, there is a certain amount of play even if a difference occurs between the deformation of the plate material and the deformation of the frame body, and it is possible to plastically deform the plate material and the frame body together into a bow shape without damaging the plate material.

In particular, according to the third invention, the plastic deformation of the horizontal frame follows the elastic deformation of the plate material, making it possible to absorb impact energy while preventing the plate material from slipping out of the frame body.

FIG. 1 is a perspective view showing a sound-insulating panel which is a panel frame according to an embodiment of the present invention. FIG. 2 is a diagram showing the sound insulation panel, where (a) is a front view seen from the road side, (b) is a right side view, (c) is a plan view, and (d) is a bottom view. FIG. 3 is a vertical cross-sectional view of the sound-insulating panel shown in FIG. FIG. 4 is a horizontal cross-sectional view showing a vertical frame of the sound insulation panel. Figure 5 is an explanatory diagram explaining the basic concept of the panel frame impact energy absorption and plate material fall-off prevention mechanism of the present invention, where (a) is a diagram showing the state before the impact force acts on the panel frame, (b) is a diagram showing the state of the panel frame when it absorbs the impact energy, and (c) is a diagram showing the deformation of only the plate material when the impact energy is absorbed. FIG. 6 is a vertical cross-sectional view showing a modified example of the lower frame of FIG. FIG. 7 is a perspective view showing a sound insulation panel in which a plurality of holes are provided symmetrically as a modification of the cross-sectional cutout portion.

The panel frame according to an embodiment of the present invention will be described in detail below with reference to the drawings.

<Soundproofing panel: Panel frame>
A panel frame according to an embodiment of the present invention will be described with reference to Figures 1 to 4. As the panel frame according to this embodiment, a translucent sound insulation panel that is installed along roads and railways, blocks the propagation of noise, and has translucency so that the outside of the panel can be seen is described as an example. Figure 1 is a perspective view showing a sound insulation panel 1, which is a panel frame according to an embodiment of the present invention. Figure 2 is a diagram showing the sound insulation panel 1, where (a) is a front view seen from the road side, (b) is a right side view, (c) is a plan view, and (d) is a bottom view.

The soundproof panel 1, which is an embodiment of the panel frame of the present invention, is stacked in multiple layers between steel supports such as H-shaped steel or channel steel (not shown) and is used as a soundproof wall that blocks the transmission of noise from vehicles passing by on roads and railways, which are noise sources.

As shown in Figures 1 and 2, the sound insulation panel 1 comprises a sound insulation plate 2, which is a plate material with a constant thickness and a rectangular shape when viewed from the front, and a frame body 3 into which the sound insulation plate 2 is fitted. Note that in Figure 1, the inside refers to the road side when the sound insulation panel 1 is installed along a road (the track side when installed along a track), and the outside refers to the private land side that is the opposite side between the road side and the sound insulation panel 1 (however, it may not be private land) (the same applies below).

(Soundproofing board: board material)
The sound insulation board 2, which is a plate material according to this embodiment, is a light-transmitting sound insulation board made of a resin plate having light transmission, such as polycarbonate (PC) or acrylic resin (PMMA: polymethyl methacrylate). Of course, the plate material according to the present invention is not limited to a light-transmitting plate material or a resin plate made of resin, and may be a metal plate material such as an aluminum alloy plate material. However, as described later, since the plate material according to the present invention needs to undergo a certain degree of elastic deformation against an impact load such as a collision of cargo from a vehicle, single-layer quartz glass, which is difficult to elastically deform and easily breaks, is excluded, and it can be said that a resin plate with a wide elastic deformation range is preferable.

Note that unlike the panel mounting structure of Patent Document 1 and the panel structure of the sound insulation wall of Patent Document 2 described in the background art, the sound insulation plate 2 is inserted and clamped in mounting grooves 65 and 74 described below, without having holes through which fixing members for mechanically fixing the plate material to other objects, such as rivets or bolts, can be inserted (see Figures 3 and 4).

(Frame)
1 and 2, the frame 3 is an anodized aluminum frame made of an aluminum alloy that is seamlessly formed as a single unit by extrusion molding, and is composed of a pair of upper and lower horizontal frames 4 and a pair of left and right vertical frames 5. The upper horizontal frame 4 is the upper frame 6, and the lower horizontal frame 4 is the lower frame 7.

As will be described in detail later, the frame 3 is designed to have the strength to withstand normal wind loads within the elastic range in terms of structural design, but in the event of an impact load that exceeds this, the horizontal frame 4, i.e., either or both of the upper frame 6 and lower frame 7, are designed to bend outward in a bow-like shape at the center, causing some of the components receiving the tensile force to break and undergo plastic deformation, absorbing the energy of the impact load.

Specifically, in the frame body 3 according to this embodiment, the upper frame 6 has a cross-sectional shape in which the bending rigidity (EI: Young's modulus × second moment of area) is higher than the bending rigidity of the lower frame 7. However, the upper frame 6 may have a cross-sectional shape in which the bending rigidity is lower than the bending rigidity of the lower frame 7. However, when the sound insulation panel 1 is installed at the top of a sound insulation wall, it is expected that the sound insulation plate 2 will easily fall out upward due to the upper frame 6 undergoing plastic deformation in a bow shape. In addition, if the upper frame 6 deforms in a bow shape, there is a risk that cargo that collides with the sound insulation panel 1 will bounce up and fly out to the outside, so in the frame body 3 according to this embodiment, the bending rigidity is reduced so that the lower frame 7 undergoes plastic deformation.

In addition, in the frame body 3 according to this embodiment, the yield stress of the frame material is set to be vertical frame 5 > upper frame 6 ≥ lower frame 7. Specifically, the vertical frame 5 is made of JIS 6005C (6N01) T5 aluminum alloy, the upper frame 6 is made of JIS 6063 T5 aluminum alloy, and the lower frame 7 is made of JIS 6063 T1 aluminum alloy. In other words, the mechanical properties (tensile strength, yield strength, elongation) of the frame material are set to be vertical frame 5 > upper frame 6 > lower frame 7. This is to increase the energy absorption rate by increasing the plastic deformation when an impact force is applied while ensuring bending rigidity (EI: Young's modulus x second moment of area) that can withstand wind loads.

((Top frame: Horizontal frame))
Next, a detailed cross-sectional shape of the horizontal frame 4 will be described with reference to Fig. 3. Fig. 3 is a vertical cross-sectional view showing the horizontal frame 4 of the sound insulation panel 1 with the middle portion omitted. As shown in Fig. 3, the pair of upper and lower horizontal frames 4 is composed of an upper frame 6 and a lower frame 7.

As shown in Figures 1 and 2, the upper frame 6 is a strip material with its longitudinal direction in the horizontal direction, and as shown in Figure 3, it comprises an upper frame body 60 (horizontal frame body) and a batten material 61 attached to the upper frame body 60.

The upper frame body 60 is a frame material whose overall vertical cross section has a generally trapezoidal shape with the height of the inner side surface being higher than the height of the outer side surface, and has an outer box section 62 with a trapezoidal (square) frame shape and a hollow cross section located on the outside of the frame cross section, and an upper box section 63 with a trapezoidal (square) frame shape that connects to the upper part of the outer box section 62. The upper frame body 60 also has an inner wall 64 that hangs down from the inner lower end of the upper box section 63.

As shown in FIG. 3, the edging material 61 is fixed to the inner wall 64 by spot fastening, and the space between the support edge portion 61a, which is the outer wall of the edging material 61, and the inner wall of the outer box portion 62 forms an attachment groove 65 into which the sound insulation plate 2 is fitted. Note that spot fastening refers to the edging material 61 being joined at intervals at a predetermined interval that can exert a strength sufficient to achieve the function of fitting the sound insulation plate 2. In this embodiment, the edging material 61 is joined to the upper frame body 60 by rivets r1. Of course, the edging material 61 may be joined by other mechanical fastenings such as bolts or screws instead of rivets, and may be joined by spot welding depending on the material.

As shown in FIG. 3, the edge material 61 is a strip material with a U-shaped cross section with one side open, and has the function of fixing the sound insulation plate 2 by fitting the edge material 61 after fitting the sound insulation plate 2 into the mounting groove 65. The edge material 61 is located on the outer surface of the entire member and has a support edge portion 61a that abuts against and supports the sound insulation plate 2 via a gasket G1 described below, a vertical edge portion 61c that is located on the opposite side facing the support edge portion 61a, and a connecting edge portion 61b that connects these. The tips of the support edge portion 61a and the vertical edge portion 61c are open ends of the U-shaped cross section. In addition, rivet holes 61d are formed at predetermined intervals in the vertical edge portion 61c.

A gasket G1 is also attached to the outer surface of the support edge 61a. This gasket G1 is a 2 mm thick rubber material made of a rubber elastic body such as propylene rubber. This gasket G1 is pressed between the pressing edge material 61 and the sound insulation board 2, and its repulsive force has the function of increasing adhesion with the sound insulation board 2 by following the angular deformation of the support edge 61a relative to the connecting edge 61b and the bow-shaped elastic deformation of the board surface of the sound insulation board 2. This reduces the risk of the sound insulation board 2 falling off the mounting groove 65.

(Bottom frame: Horizontal frame)
1 and 2, like the upper frame 6, the lower frame 7 is a strip material with its length in the horizontal direction, and is configured to fit with the upper frame 6 of the lower sound insulation panel 1 to resist the vertical force of the panel surface of the sound insulation panel 1. Also, as shown in Fig. 3, the lower frame 7 includes a lower frame body 70 (horizontal frame body) and the aforementioned battening material 61 attached to this lower frame body 70.

This lower frame body 70 has an outer box section 71 that is a trapezoidal (rectangular) frame with a low height on the inner wall, which is a hollow cross section located on the outside of the frame cross section, and the inclined bottom surface of this outer box section 71 is extended inward to form a lower section 72 with a cross section that is L-shaped. The L-shaped cross section of this lower section 72 is shaped to fit into the approximately trapezoidal upper frame body 60 mentioned above.

The lower frame body 70 has an inner wall 73 that rises from the inside lower end of the lower portion 72. As shown in FIG. 3, the edging material 61 is fixed to this inner wall 73 with a rivet r1, and the space between the support edge portion 61a, which is the outer wall of the edging material 61, and the inner wall of the outer box portion 71 forms an attachment groove 74 into which the sound insulation plate 2 is fitted.

The width d2 of the outer box portion 71 is longer than the width of the edge material 61 and the distance d1 from the mounting groove 74 to the inner surface of the inner wall 73; that is, the mounting groove 74 (mounting groove 65) is positioned eccentrically inward with respect to the central axis of the lower frame 7. For this reason, as will be described in detail later, the inner wall 73 of the lower frame body 70 can be bent and buckled while maintaining the integrity of the outer part (outer box portion 71) of the lower frame 7, from which the soundproofing plate 2 is likely to come loose when deformation occurs due to the input of an impact force.

As shown in FIG. 3, in the soundproof panel 1, the upper frame 6 has an upper box portion 63 at a position that is the compression side when the upper frame 6 bends outward, whereas the lower frame 7 does not have a rectangular frame-shaped closed portion at a corresponding position. As a result, the bending stiffness (EI) of the lower frame 7 is lower than the bending stiffness (EI) of the upper frame 6 in the cross-sectional shape.

As shown in FIG. 3, the lower frame 7 has a circular hole 71a, which is a cross-sectional defect, formed in the upper surface of the outer box portion 71, which is a hollow cross-section, and a circular hole 71b, which is a cross-sectional defect, formed in the lower surface of the outer box portion 71. These holes 71a and 71b are holes of the same diameter provided at the same position on a plane, and are through holes that vertically penetrate the outer box portion 71.

However, these holes 71a and 71b are not limited to holes that penetrate the member, but may be any cross-sectional defect. Here, a cross-sectional defect refers to the provision of a strength weak point such as a recess, thin wall, or notch formed in the lower frame 7, and includes joining a low-strength alloy that partially yields under low stress.

However, as will be described in detail later, in the present invention, when absorbing impact energy, the lower frame 7 is curved in a bow or dogleg shape with the center protruding outward, inducing the outer portion of the sound insulation panel 2 to rupture and undergo plastic deformation due to the tensile force of the bending stress. For this reason, in the sound insulation panel 1 according to this embodiment, it is preferable to provide a cross-sectional defect on the outside of the outer box portion 71 where the tensile force of the bending stress acts.

Furthermore, providing a hole that penetrates horizontally through the frame body 3 may impair the sound insulation function of the sound insulation panel 1. However, in the sound insulation panel 1 according to this embodiment, the cross-sectional defect provided in the lower frame 7 is a through-hole that penetrates the outer box portion 71 vertically, so that noise from the road side does not directly penetrate into the frame in the first place. Therefore, the sound insulation panel 1 eliminates the risk of noise leaking through the holes 71a, 71b in the cross-sectional defect portion.

((Vertical frame))
Next, the detailed cross-sectional shape of the horizontal frame 4 will be described with reference to Fig. 4. Fig. 4 is a horizontal cross-sectional view showing the vertical frame 5 of the soundproof panel 1. As shown in Figs. 1 and 2, the vertical frame 5 is a strip material with its longitudinal direction in the up-down direction, and as shown in Fig. 4, includes a vertical frame body 50 and a batten 51 attached to the vertical frame body 50. The batten 51 is a strip material with a U-shaped cross section, with its longitudinal direction in the up-down direction, similar to the batten 61 described above, and with one side open. The gasket G1 described above is bonded to the outer wall of the batten 61.

The vertical frame body 50 is a frame material whose overall horizontal cross section is rectangular, and has a rectangular outer box section 52 located on the outside of the frame cross section, and an attachment groove section 53 adjacent to the inside of the outer box section 52, which serves as an attachment groove for attaching the soundproofing plate 2. The inner end of the attachment groove section 53 forms an inner wall 54 that extends to the left and right ends of the vertical frame body 50, and the outer wall of the outer box section 52 forms a protruding wall 55 that extends to the left and right ends of the vertical frame body 50.

As shown in FIG. 4, three screw holes 52a are formed in the outer box section 52. These screw holes 52a are for screwing the pair of upper and lower horizontal frames 4 to the vertical frame 5. That is, in the soundproof panel 1, the vertical frame 5 and the horizontal frame 4 are connected by screws driven into the horizontal frame 4. Therefore, with the soundproof panel 1, the horizontal frame 4 (lower frame 7, upper frame 6) can easily rotate relative to the vertical frame 5 around the screws, and the horizontal frame 4 can be induced to be curved and deformed in a bow shape with the center protruding outward.

Rings M1 are bolted to the left and right side walls of the outer box section 52 between the inner wall 54 and the protruding wall 55. These rings M1 are used to insert a fall prevention wire and connect the soundproof panel 1 to the support so that it does not fall off.

A vertical frame seal material G2 made of a rubber elastic material such as propylene rubber is adhered to the inner end of the inner wall 54. This vertical frame seal material G2 is a member for increasing the adhesion between the support and the sound insulation panel 1.

<Mechanism for absorbing shock energy from panel frames and preventing boards from falling off>
Next, the panel frame impact energy absorption and plate material falling-off prevention mechanism, which is an essential part of the present invention, will be described in detail with reference to Figures 5 to 7, taking the above-mentioned sound-insulating panel 1 as an example of the panel frame. Figure 5 is an explanatory diagram for explaining the basic concept of the panel frame impact energy absorption and plate material falling-off prevention mechanism of the present invention, in which (a) is a diagram showing the state before an impact force acts on the sound-insulating panel 1, (b) is a diagram showing the state of the sound-insulating panel 1 when the impact energy is absorbed, and (c) is a diagram showing the deformation of only the sound-insulating plate 2 when the impact energy is absorbed.

As shown in FIG. 5, in the present invention, when an impact force, such as a vehicle cargo collision or a wind load exceeding the wind load at the time of structural design, acts on the sound insulation panel 1, which is a panel frame, one or both of the pair of upper and lower horizontal frames 4 of the frame body 3 are plastically deformed to absorb the impact energy, preventing the sound insulation panel 2, which is a plate material, from being destroyed or coming off the frame body 3.

This concept is clearly different from the panel mounting structure in Patent Document 1 and the soundproof wall panel structure in Patent Document 2, in which only the upper edge of the four sides of the resin plate is fixed, leaving the other three sides free like a curtain to allow impact energy to escape.

If all four sides of the plate (soundproof plate 2) are mechanically fixed with rivets or the like, not only will the range in which the plate (soundproof plate 2) can deform become narrower, but the impact energy will be absorbed only by the elastic deformation of the plate (soundproof plate 2), which may result in a high risk of damage due to insufficient absorption.

In contrast, if the top edge is fixed like a curtain and the other three sides are left free, the aforementioned problems will arise, such as the risk that impacting objects such as cargo from vehicles or flying objects will become free and fall to the outside through the open areas.

In this invention, as shown in FIG. 5(c), when an impact force acts on the plate material (sound insulation board 2), the pair of upper and lower horizontal frames that secure the plate material (sound insulation board 2) are also plastically deformed in the direction in which the plate material (sound insulation board 2) tends to bend. The horizontal frames may be either the upper or lower horizontal frames, or both. The pair of left and right vertical frames 5 have surfaces that are fixed to the supports, and therefore cannot follow the deformation of the plate material (sound insulation board 2), so it is preferable not to plastically deform them.

However, as mentioned above, when the sound insulation panel 1 is installed at the top of a sound insulation wall, it is expected that when the upper frame 6 undergoes plastic deformation in a bow shape, it will also deform upwards, causing the sound insulation panel 2 to fall out of the upper frame 6. On the other hand, the lower frame 7 is in contact with the upper frame of the lower panel when the ground is covered or the panels are stacked, and does not change downwards, making it easy for it to follow the deformation of the plate material (sound insulation panel 2). Therefore, it can be said that it is preferable to induce the lower frame 7 to undergo plastic deformation in a bow shape.

For this reason, as described above, in the sound insulation panel 1, cross-sectional defects (holes 71a, 71b) are provided in the lower frame 7 at the position that will be the tensile side when the panel is bent, inducing plastic deformation into a bow shape. In other words, the cross-sectional shape is such that the bending rigidity (EI) of the lower frame 7 is lower than the bending rigidity (EI) of the upper frame 6. For this reason, in the sound insulation panel 1, not only is it possible to reduce the risk of the plate material (sound insulation panel 2) being pulled out upwards by the force of an impact even when the sound insulation panel 1 is installed at the top of a sound insulation wall, but it is also possible to reduce the risk of an impacting body bouncing off the sound insulation panel 1 and flying out to the outside.

In addition, in the panel mounting structure of Patent Document 1 and the panel structure of the sound insulation wall of Patent Document 2, holes are drilled in the resin plate, and the upper edge is mechanically and completely fixed with bolts or the like. However, in the sound insulation panel 1 according to the embodiment of the present invention, the sound insulation plate 2 is loosely fixed by simply inserting it into the mounting grooves 65, 74, 53. This increases the tolerance for elastic deformation of the sound insulation plate 2, reducing the risk of the sound insulation plate 2 cracking or being damaged. In addition, since no holes are drilled in the sound insulation plate 2, which is a resin plate, stress is concentrated in the holes, reducing the risk of cracks occurring there, which also reduces the risk of the sound insulation plate 2 cracking or being damaged in this respect.

However, simply inserting the sound insulation plate 2 into the mounting grooves 65, 74, 53 may cause the sound insulation plate 2 to fall off while the horizontal frame 4 (lower frame 7) of the frame body 3 is undergoing plastic deformation. In the present invention, as a measure to prevent the plate material (sound insulation plate 2) from falling off, as described above, width d2 is set to be greater than distance d1 (see Figure 3), and the mounting grooves 65, 74, 53 are positioned eccentrically inward with respect to the central axis of the frame body 3 (lower frame 7).

In addition, a box-shaped outer box portion 71 with a hollow cross section and high cross-sectional performance (second moment of area and section modulus) is provided at a position on the outside of the sound insulation plate 2 of the lower frame 7 that is plastically deformed. Therefore, even if the sound insulation plate 2 is deformed, the sound insulation plate 2 is hooked to the outer box portion 71 with a hollow cross section and high cross-sectional performance, and the sound insulation plate 2 is unlikely to come off the mounting groove 74.

On the other hand, the outside of the outer box section 71 is configured to have a cross-sectional defect. Therefore, when absorbing impact energy, the lower frame 7 bends in a bow or dogleg shape with the center protruding outward, and the outer portion of the plate material (soundproofing plate 2) is induced to break and undergo plastic deformation due to the tensile force of the bending stress (see FIG. 5(b)).

As mentioned above, in the soundproofing panel 1, screw holes 52a are provided in the vertical frame 5, and screws are driven into the horizontal frame 4 to connect the vertical frame 5 and the horizontal frame 4. This makes it easier for the lower frame 7, which is the horizontal frame 4, to rotate relative to the vertical frame 5 around the screw, which also helps induce the lower frame 7 to deform in a curved manner.

In addition, as mentioned above, in the soundproof panel 1, the yield stress of each frame material of the frame body 3 is as follows: the vertical frame 5 is made of JIS 6005C (6N01) T5 aluminum alloy, the upper frame 6 is made of JIS 6063 T5 aluminum alloy, and the lower frame 7 is made of JIS 6063 T1 aluminum alloy. In other words, the mechanical properties of the frame materials (tensile strength, yield strength, elongation) are vertical frame 5 > upper frame 6 > lower frame 7. This ensures bending rigidity (EI: Young's modulus x second moment of area) that can withstand wind loads, while increasing plastic deformation when an impact force is applied, thereby increasing the energy absorption rate.

As described above, in the sound insulation panel 1 according to this embodiment, the lower frame body 70 (horizontal frame body) and the batten 61 are configured as separate bodies, but as shown in FIG. 6, the lower frame body 70 and the batten 61 may be configured as one body. However, in order to lower the bending rigidity (EI) compared to the outer box portion 71, the inner wall of the mounting groove 74 that supports the inside of the sound insulation panel 2 is not connected to the bottom surface (lower portion 72) that forms the mounting groove 74. In other words, one end of the inner wall of the mounting groove 74 is made a free end (cantilever) so as not to be box-shaped. FIG. 6 is a vertical cross-sectional view showing a modified lower frame.

In the sound insulation panel 1, holes 71a and 71b are provided in the center of the longitudinal direction of the lower frame 7 at the center of the sound insulation panel 1 as the cross-sectional defect. However, as shown in FIG. 7, multiple cross-sectional defect portions (holes 71a) may be provided symmetrically on the outside of the upper surface of the outer box portion 71, with the longitudinal direction of the lower frame 7 being the left-right direction. By providing multiple cross-sectional defect portions (holes 71a), the cross-sectional defect portions are more likely to be torn off by the tensile force of the bending stress, and the lower frame 7 can be more smoothly induced to plastically deform in a bow shape. FIG. 7 is a perspective view showing a sound insulation panel 1' in which multiple holes 71a are provided symmetrically as a modified cross-sectional defect portion.

In addition, by making the cross-sectional loss portion (hole 71a) symmetrical, the lower frame 7 can be gently curved and deformed, making it possible to absorb more of the energy of the impact force while securely holding the soundproofing plate 2 within the mounting groove 74.

The sound insulation panel 1 according to this embodiment, as described above, has an inexpensive and simple structure, and each frame member of the frame body 3 has cross-sectional performance capable of withstanding wind loads as a design load. When an impact load is applied, either or both of the upper frame 6 and the lower frame 7 undergo plastic deformation to release the impact load, so that even if an impact force is applied to the sound insulation panel 1, damage to the sound insulation board 2 can be prevented.

In addition, with the sound insulation panel 1, even if an impact force is applied, the sound insulation plate 2 remains attached to the frame body 3 (mounting grooves 65, 74, 53) and does not come off the frame body 3 and become suspended in the air, reducing the risk of the impacting object falling to the outside through the space opened up by the sound insulation plate 2 coming off.

In addition, with the sound insulation panel 1, the sound insulation board 2 does not come off the frame 3 and become suspended, so the structure is stable and safe until the deformed sound insulation panel 1 can be replaced.

In addition, according to the soundproofing panel 1, the bending rigidity of the lower frame 7 is lower than that of the upper frame 6, and the cross-sectional shape of the lower frame 7 is designed to be easily ruptured by the tensile force of bending stress, so that the lower frame 7 can be induced to plastically deform by bending in a bow shape with the center protruding outward.

The above provides a detailed explanation of the soundproofing panel 1 according to an embodiment of the present invention. However, the above-mentioned and illustrated embodiments merely show one embodiment realized in carrying out the present invention, and the technical scope of the present invention should not be interpreted as being limited by the illustrated embodiments.

1, 1': Soundproof panel (panel frame)
2: Soundproofing board (board material)
3: Frame body 4: Horizontal frame 5: Vertical frame 50: Vertical frame main body 51: Edge material 52: Outer box part 52a: Screw hole 53: Mounting groove part (mounting groove)
54: Inside wall 55: Projecting wall 6: Upper frame (horizontal frame)
60: Upper frame body (horizontal frame body)
61: Push-in edge 61a: Support side portion 61b: Connecting side portion 61c: Vertical side portion 61d: Rivet hole 62: Outer box portion 63: Upper box portion 64: Inner wall 65: Mounting groove 7: Lower frame (horizontal frame)
70: Lower frame body (horizontal frame body)
71: outer box portion 71a, 71b: hole (cross-sectional defect portion)
72: Lower part 73: Inner wall 74: Mounting groove G1: Gasket G2: Vertical frame seal material M1: Round ring r1: Rivet

Claims (3)

A panel frame including a plate material and a frame body into which the plate material is fitted,
The frame body has a pair of upper and lower horizontal frames and a pair of left and right vertical frames,
A cross-sectional cutout portion is provided on the outer side of the plate material of one or both of the pair of upper and lower horizontal frames ,
The horizontal frame that undergoes plastic deformation has a hollow cross section formed on the outer side of the plate material,
The hollow cross section is provided with the cross-sectional loss portion,
The panel frame, wherein the cross-sectional defect portion is a through hole that vertically passes through an upper surface and a lower surface of the hollow cross-section. The panel frame according to claim 1, characterized in that the plate material is inserted and clamped in an attachment groove formed in the frame body, without a hole being formed through which a fixing member for fixing the plate material to the frame body can be inserted. The panel frame according to claim 1 or 2 , characterized in that the cross-sectional loss portion is provided in a plurality of positions symmetrically with respect to the longitudinal direction of the horizontal frame which undergoes plastic deformation.

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