Panel frame

Abstract

To provide a panel frame capable of preventing damage to a panel material by relieving impact load in such a manner that one of the upper and lower frames is plastically deformed when an impact load is applied, which has cross-sectional performance that can withstand wind loads with an inexpensive and simple configuration.SOLUTION: A panel frame (sound insulation panel 1) includes a board (sound insulation board 2), and a frame 3 with the board (sound insulation board 2) engaged. The frame 3 is provided with a pair of upper and lower horizontal frames 4 and a pair of left and right vertical frames 5. Cross-sectional missing portions (holes 71a and 71b) are formed outside one or both of the pair of upper and lower horizontal frames 4 (upper frame 6 and lower frame 7).SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a panel frame such as a soundproof panel that is 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, when an impact force due to an accident or the like acts on a plate material, the frame body undergoes plastic deformation to absorb the impact force. [Background technology]

[0002] In this type of sound insulation panel, the sound insulation plate that blocks noise is often a transparent 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 sound insulation panel in which such a transparent plate made of a resin plate is embedded, the transparent plate may break. In particular, if the transparent plate is completely fixed to the frame in which it is embedded, the impact force is concentrated on a part of the panel, so that the transparent plate is likely 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 transparent plate may come off the frame due to the impact force, and the edge part of the transparent plate may be exposed, which is dangerous, or the transparent plate may break and fragments may fly off, which may expand the disaster.

[0003] In order to solve such problems, for example, Patent Document 1 discloses a panel mounting structure in which only one side of a panel 2 of a light-transmitting 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 force of an impact on the panel 2 and preventing the light-transmitting panel from being destroyed (see paragraphs

[0007] to

[0011] of the specification of Patent Document 1, Figure 4 of the drawings, etc.).

[0004] Furthermore, Patent Document 2 discloses a panel structure for a soundproof wall in which a frame 2 is attached to all four peripheries of a resin plate 1, one side 21 and at least one other side 22 are engaged with the frame by engaging means 3, and the engaging force of said one 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 engaging means (see claim 1 in the claims of Patent Document 2, paragraphs

[0014] to

[0019] of the specification, Figures 1 to 4 of the drawings, etc.).

[0005] However, in the panel mounting structure of Patent Document 1 and the sound insulation wall panel structure of Patent Document 2, when an impact force is applied to the panel, the light-transmitting plate made of a resin plate such as polycarbonate is structured so that three sides except the top side are detached from the frame like a curtain. Therefore, there is a risk that an impacting object such as cargo from a vehicle or flying objects will fall outside the sound insulation wall from the part where the light-transmitting plate is detached and opened.

[0006] In addition, the panel mounting structure of Patent Document 1 and the panel structure of the sound insulation wall of Patent Document 2 require drilling holes in the resin plate of the light-transmitting panel, which causes problems in that it takes time and effort to process the resin plate and assemble the panel. 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 is blown around by the wind.

[0007] On the other hand, when a glass plate made of quartz glass or the like is used for the light-transmitting plate of the light-transmitting panel instead of a resin plate, the tensile strength of glass is low and it does not bend, so the above-mentioned method of opening by separating three sides like a curtain cannot be used. Therefore, when a glass plate is used for the light-transmitting plate, a countermeasure has been proposed in which the frame of the light-transmitting plate that fixes the light-transmitting plate is configured as a separate part from the main frame that is the overall frame, so that the frame of the light-transmitting plate falls off from the main frame when an impact force is applied.

[0008] For example, Patent Document 3 discloses a soundproof panel 1 using a light-transmitting plate, in which an inner frame 3 is fitted to the inside of an outer frame, a peripheral portion of a light-transmitting material 4 is attached to the inner frame 3 so as to be supported via an elastic sealant 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 to the rear side relative to the outer frame at the low-strength joined portion, and the inner frame 3 is rotated to the rear side around the side to which the pin is fixed (see claim 1 in the claims of Patent Document 3, paragraphs

[0012] to

[0029] of the specification, and Figures 11 and 12 of the drawings, etc.).

[0009] However, the soundproof panel 1 of Patent Document 3 is also configured so that the inner frame 3 falls off from 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 caused by the detachment of the translucent panel.

[0010] In addition, the soundproof panel 1 in Patent Document 3 has a double structure of an outer frame 2 and an inner frame 3, which requires many parts and takes a long time to assemble. In addition, the soundproof panel 1 in Patent Document 3 also has the problem that the inner frame 3 is suspended from the ceiling until it is replaced, which can be dangerous as it can be blown around by the wind. [Prior art documents] [Patent documents]

[0011] [Patent Document 1] Japanese Patent Application Publication No. 04-302608 [Patent Document 2] JP 2001-193026 A [Patent Document 3] JP 2012-211434 A Summary of the Invention [Problem to be solved by the invention]

[0012] Therefore, the present invention has been devised in consideration of the above-mentioned problems, and its object is to provide a panel frame which has an inexpensive and simple configuration, has cross-sectional performance capable of withstanding wind loads, and when an impact load is applied, either the upper or lower frame will undergo plastic deformation to release the impact load and prevent damage to the panel material. [Means for solving the problem]

[0013] The panel frame according to the first aspect of the present invention is a panel frame including 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, and a cross-sectional cutout portion is provided on the outer side of the plate material of either or both of the pair of upper and lower horizontal frames. The horizontal frame that undergoes plastic deformation has a hollow cross section formed outside the plate material, and the cross section is provided with the cross section loss portion, and the cross section loss portion is a through hole that vertically penetrates the upper and lower surfaces of the hollow cross section. It is characterized by:

[0014] The panel frame of the second invention is characterized in that, in the first invention, the plate material is inserted and clamped in an attachment groove formed in the frame body, without any hole being formed through which a fixing member for fixing the plate material to the frame body can be inserted.

[0018] No. 3 The panel frame according to the present invention is the first invention Or second In the present invention, the cross-sectional loss portion is provided symmetrically in a left-right direction with respect to the longitudinal direction of the horizontal frame that undergoes plastic deformation. Effect of the Invention

[0019] First Invention to Third Invention 3 According to the invention, the structure is inexpensive and simple, and has a cross-sectional performance capable of withstanding wind load as a design load, and when an impact load is applied, either or both of the upper and lower frames undergo plastic deformation to release the impact load, so that damage to the plate material can be prevented even when an impact force is applied. 3According to the invention, 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 it is possible to reduce the risk of an impacting object such as cargo from a vehicle or flying debris falling to the outside through the open space. 3 According to the invention, the plate material does not come off the frame and become suspended, so the structure is stable and safe until the deformed panel frame can be 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 deformed, 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 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, but when an impact force is applied, the horizontal frame tears off from the through hole and undergoes plastic deformation, thereby improving the impact energy that can be absorbed.

[0020] In particular, according to the second invention, since no holes for inserting fixing members such as bolts or pins are formed in the plate material, 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.

[0024] In particular, 3 According to the invention, the plastic deformation of the horizontal frame follows the elastic deformation of the plate material, and impact energy can be absorbed while preventing the plate material from slipping out of the frame body. [Brief description of the drawings]

[0025] [Figure 1] FIG. 1 is a perspective view showing a sound-insulating panel which is a panel frame according to an embodiment of the present invention. [Diagram 2] FIG. 2 shows 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. [Diagram 3] FIG. 3 is a vertical cross-sectional view of the sound-insulating panel shown in FIG. [Figure 4] FIG. 4 is a horizontal cross-sectional view showing a vertical frame of the sound-insulating panel. [Diagram 5]FIG. 5 is an explanatory diagram explaining the basic concept of the panel frame's impact energy absorption and plate material falling-off prevention mechanism of the present invention, in which (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. [Figure 6] FIG. 6 is a vertical cross-sectional view showing a modified example of the lower frame of FIG. [Figure 7] FIG. 7 is a perspective view showing a sound-insulating panel in which a plurality of holes are provided symmetrically as a modification of the cross-sectional cutout portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a panel frame according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0027] <Soundproofing panel: Panel frame> A panel frame according to an embodiment of the present invention will be described with reference to Figs. 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 will be described as an example. Fig. 1 is a perspective view showing a sound insulation panel 1, which is a panel frame according to an embodiment of the present invention. Fig. 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.

[0028] The sound-insulating 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 sound-insulating wall that blocks the transmission of noise from vehicles passing by on roads and railways, which are noise sources.

[0029] 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 the inside shown in Fig. 1 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).

[0030] (Soundproofing board: board material) The sound insulation board 2, which is the plate material according to this embodiment, is a light-transmitting sound insulation board made of a light-transmitting resin plate such as polycarbonate (PC) or acrylic resin (PMMA: polymethyl methacrylate). Of course, the plate material according to the present invention is not limited to light-transmitting plate materials or resin plates made of resin, and may be a metal plate material such as an aluminum alloy plate material. However, as described later, the plate material according to the present invention is required to undergo a certain degree of elastic deformation in response to an impact load such as a collision with cargo from a vehicle, so that single-layer quartz glass, which is difficult to deform elastically and easily breaks, is excluded, and it can be said that a resin plate with a wide elastic deformation range is preferable.

[0031] Unlike the panel mounting structure of Patent Document 1 and the panel structure of the sound-insulating wall of Patent Document 2 described in the background art, the sound-insulating plate 2 is inserted into and clamped in mounting grooves 65, 74 described below, without having holes through which to insert fixing members for mechanically fixing the plate to other objects, such as rivets or bolts (see Figures 3 and 4).

[0032] (Frame) 1 and 2, the frame 3 is an anodized aluminum frame made of an aluminum alloy that is seamlessly molded 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.

[0033] Furthermore, as will be described in detail later, the frame body 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 frames 4, i.e., either the upper frame 6 or the lower frame 7 or both, 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, thereby absorbing the energy of the impact load.

[0034] Specifically, in the frame 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-insulating panel 1 is installed at the top of a sound-insulating wall, it is expected that the sound-insulating plate 2 will easily fall off upwards 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-insulating panel 1 will jump up and fly out to the outside, so in the frame 3 according to this embodiment, the bending rigidity is reduced so that the lower frame 7 undergoes plastic deformation.

[0035] 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 an aluminum alloy of JIS 6005C (6N01) T5, the upper frame 6 is made of an aluminum alloy of JIS 6063 T5, and the lower frame 7 is made of an aluminum alloy of JIS 6063 T1. 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 × second moment of area) that can withstand wind loads.

[0036] ((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-insulating panel 1 with the middle portion omitted. As shown in Fig. 3, the pair of upper and lower horizontal frames 4 is made up of an upper frame 6 and a lower frame 7.

[0037] As shown in Figures 1 and 2, this 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 main body 60 (horizontal frame main body) and a pressing edge material 61 attached to this upper frame main body 60.

[0038] This 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 portion 62 in the shape of a trapezoidal (rectangle) frame with a hollow cross-section located on the outside of the frame cross-section, and an upper box portion 63 in the shape of a trapezoidal (rectangle) frame connected to the upper portion of this outer box portion 62. In addition, the upper frame body 60 has an inner wall 64 formed hanging down from the inner lower end of the upper box portion 63.

[0039] 3, the batten 61 is fixed to the inner wall 64 by spot fastening, and the space between the support edge 61a, which is the outer wall of the batten 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 batten 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 batten 61 is joined to the upper frame body 60 by a rivet r1. Of course, the batten 61 may be joined by other mechanical fastening such as bolts or screws instead of rivets, and may be joined by spot welding depending on the material.

[0040] As shown in Fig. 3, the pressing edge material 61 is a strip material with a U-shaped cross section with one side open, and has a function of fixing the sound insulation plate 2 by fitting the pressing edge material 61 after fitting the sound insulation plate 2 into the mounting groove 65. The pressing edge material 61 is located on the outer surface of the entire member and has a support side portion 61a that abuts against and supports the sound insulation plate 2 via a gasket G1 described later, a vertical side portion 61c that is located on the opposite side facing the support side portion 61a, and a connecting side portion 61b that connects them. The tips of the support side portion 61a and the vertical side portion 61c are open ends of the U-shaped cross section. In addition, rivet holes 61d are formed at predetermined intervals in the vertical side portion 61c.

[0041] A gasket G1 is adhered to the outer surface of the support edge 61a. The gasket G1 is a 2 mm thick rubber material made of a rubber elastic body such as propylene rubber. The gasket G1 is pressed between the pressing member 61 and the sound insulation plate 2, and has a function of increasing the adhesion with the sound insulation plate 2 by its repulsive force, following the angular deformation of the support edge 61a with respect to the connecting edge 61b and the bow-shaped elastic deformation of the plate surface of the sound insulation plate 2. This reduces the risk of the sound insulation plate 2 falling off the mounting groove 65.

[0042] ((Bottom frame: Horizontal frame)) 1 and 2, like the upper frame 6, the lower frame 7 is a strip member with its longitudinal direction extending horizontally, and is configured to fit with the upper frame 6 of the lower sound-insulating panel 1 to resist the vertical force of the panel surface of the sound-insulating panel 1. Also, as shown in Fig. 3, the lower frame 7 includes a lower frame body 70 (horizontal frame body) and the aforementioned pressing member 61 attached to this lower frame body 70.

[0043] This lower frame body 70 has an outer box portion 71 in the shape of a trapezoid (rectangular) frame with a low height on the inner side wall, which is a hollow cross section located on the outside of the frame cross section, and the inclined bottom surface portion of this outer box portion 71 is directly extended inward to form a lower portion 72 with a L-shaped cross section. The L-shaped cross section of this lower portion 72 is shaped to fit with the generally trapezoidal upper frame body 60 described above.

[0044] The lower frame body 70 is formed with an inner wall 73 rising from the inner lower end of the lower portion 72. As shown in Fig. 3, the pressing member 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 pressing member 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.

[0045] Furthermore, the width d2 of the outer box portion 71 is longer than the width of the edging material 61 and the distance d1 from the mounting groove 74 to the inner surface of the inner wall 73; that is, the position of the mounting groove 74 (mounting groove 65) is eccentrically disposed inward with respect to the central axis of the lower frame 7. For this reason, as will be described in detail later, it is possible to bend and buckle the inner wall 73 of the lower frame body 70 while maintaining the integrity of the outer portion (outer box portion 71) of the lower frame 7 from which the sound insulation plate 2 is likely to come loose when it is deformed by the input of an impact force.

[0046] As shown in FIG. 3, in the sound-insulating panel 1, the upper frame 6 has an upper box portion 63 at a position that is compressed 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 rigidity (EI) of the lower frame 7 is lower than the bending rigidity (EI) of the upper frame 6 in a cross-sectional shape.

[0047] 3, in the lower frame 7, a circular hole 71a which is a cross-sectional defect is 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 is 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 which vertically penetrate the outer box portion 71.

[0048] However, these holes 71a and 71b are not limited to holes that penetrate the member, but may be any cross-sectional defect. Here, the cross-sectional defect refers to the provision of a strength weak point such as a recess, thin wall portion, or notch formed in the lower frame 7, and includes joining a low-strength alloy that partially yields at a low stress.

[0049] 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 central portion protruding outward, and the outer portion of the sound insulation panel 2 is induced 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.

[0050] 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 vertically through the outer box portion 71, 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 from the holes 71a, 71b in the cross-sectional defect portion.

[0051] ((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, it comprises 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 one side open and its longitudinal direction in the same manner as the batten 61 described above. In addition, the gasket G1 described above is adhered to the outer wall of the batten 61.

[0052] The vertical frame body 50 is a frame material whose overall external shape in horizontal cross section is rectangular, and has a rectangular outer box portion 52 located on the outside of the frame cross section, and a mounting groove portion 53 adjacent to the inside of this outer box portion 52 and serving as a mounting groove for mounting the sound insulation plate 2. The inner end of the mounting groove portion 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 portion 52 forms a protruding wall 55 that extends to the left and right ends of the vertical frame body 50.

[0053] As shown in Fig. 4, three screw holes 52a are formed in the outer box portion 52. These screw holes 52a are for screwing the pair of upper and lower horizontal frames 4 to the vertical frames 5. That is, in the sound-insulating panel 1, the vertical frames 5 and the horizontal frames 4 are connected to each other by screws being driven into the horizontal frames 4. Therefore, with the sound-insulating panel 1, the horizontal frames 4 (lower frame 7, upper frame 6) can easily rotate relative to the vertical frames 5 around the screws, and the horizontal frames 4 can be induced to be curved and deformed in a bow shape with the central portion protruding outward.

[0054] Furthermore, round rings M1 are bolted to the left and right side walls of the outer box portion 52 between the inner wall 54 and the protruding wall 55. These round rings M1 are used to pass a fall prevention wire through and connect the sound insulation panel 1 to the support pillar so that it does not fall off.

[0055] 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 improving the adhesion between the support pillar and the sound insulation panel 1.

[0056] <Mechanism for absorbing shock energy from panel frames and preventing boards from falling off> Next, the impact energy absorption and plate material falling-off prevention mechanism of the panel frame, 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 impact energy absorption and plate material falling-off prevention mechanism of the panel frame 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.

[0057] As shown in Figure 5, in the present invention, when an impact force that exceeds the wind load required for the structural design or an impact force such as a collision with cargo from a vehicle acts on the sound-insulating panel 1, which is a panel frame, the impact energy is absorbed by plastically deforming one or both of the pair of upper and lower horizontal frames 4 of the frame body 3, thereby preventing the sound-insulating panel 2, which is a plate material, from being destroyed or coming off the frame body 3.

[0058] This idea is clearly different from the idea of ​​fixing only the upper edge of the four sides of the resin plate, leaving the other three sides free like a curtain to allow impact energy to escape, as in the panel mounting structure of Patent Document 1 and the soundproof wall panel structure of Patent Document 2.

[0059] If the four sides of the plate material (sound insulation plate 2) are completely fixed mechanically with rivets or the like, not only will the range in which the plate material (sound insulation plate 2) can deform be narrowed, but the impact energy will be absorbed only by the elastic deformation of the plate material (sound insulation plate 2), which will likely not be able to absorb all the energy and may result in damage.

[0060] On the other hand, if the top edge is fixed like a curtain and the other three edges are left free, the aforementioned problems will arise, such as the risk that impacting objects such as cargo from vehicles or flying debris will become free and fall to the outside through the open areas.

[0061] Therefore, in the present 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 fix 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.

[0062] 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, the upper frame 6 will also deform upward, and as a result, the sound insulation panel 2 will 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 during the ground covering or panel stacking, and will not change downward, so it is easy 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.

[0063] For this reason, as described above, in the sound-insulating panel 1, cross-sectional defects (holes 71a, 71b) are provided in the lower frame 7 at positions that will be on the tensile side when the panel is bent, to induce plastic deformation into a bow shape. In other words, the cross-sectional shape of the lower frame 7 is such that the bending rigidity (EI) is lower than the bending rigidity (EI) of the upper frame 6. For this reason, in the sound-insulating panel 1, not only can the risk of the plate material (sound-insulating panel 2) being pulled out upwards by the force of an impact be reduced even when the sound-insulating panel 1 is installed at the top of a sound-insulating wall, but the risk of an impacting body bouncing off the sound-insulating panel 1 and flying out to the outside can also be reduced.

[0064] 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 to be fixed is completely mechanically 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, and 53. This increases the tolerance for elastic deformation of the sound insulation plate 2, reducing the risk of the sound insulation plate 2 being damaged, such as cracking. 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 therefrom, and in this respect, the risk of the sound insulation plate 2 being damaged, such as cracking, can also be reduced.

[0065] 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 FIG. 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).

[0066] 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 outer side 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 and secured by 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.

[0067] On the other hand, a cross-sectional defect is provided on the outside of the outer box portion 71. 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 (sound insulation plate 2) is induced to break and undergo plastic deformation due to the tensile force of the bending stress (see FIG. 5(b)).

[0068] Furthermore, in the sound-insulating panel 1, as mentioned above, screw holes 52a are provided in the vertical frames 5 and screws are driven into the horizontal frames 4 to connect the vertical frames 5 and the horizontal frames 4. This makes it easier for the bottom frame 7, which is the horizontal frame 4, to rotate relative to the vertical frames 5 around the screws, which also makes it possible to induce a curved deformation of the bottom frame 7.

[0069] In addition, as described above, in the sound insulation 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 (tensile strength, proof stress, elongation) of the frame materials are vertical frame 5 > upper frame 6 > lower frame 7. This makes it possible 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 × second moment of area) that can withstand wind loads.

[0070] 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 part 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 part 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 example of the lower frame.

[0071] In the sound insulation panel 1, holes 71a and 71b are provided in the center of the longitudinal direction of the bottom frame 7 at the center of the sound insulation panel 1 as the cross-sectional defect. However, as shown in Fig. 7, a plurality of cross-sectional defect portions (holes 71a) may be provided symmetrically on the outside of the upper surface of the outer box portion 71 described above with the longitudinal direction of the bottom frame 7 being the left-right direction. By providing a plurality of cross-sectional defect portions (holes 71a), the cross-sectional defect portions are easily torn off by the tensile force of the bending stress, and the bottom 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 a plurality of holes 71a are provided symmetrically as a modified cross-sectional defect portion.

[0072] Furthermore, by making the cross-sectional missing portion (hole 71a) symmetrical, the lower frame 7 can be gently curved and deformed, making it possible to absorb more impact energy while securely holding the sound-proofing plate 2 within the mounting groove 74.

[0073] As described above, the sound-insulating panel 1 of this embodiment has an inexpensive and simple configuration, and each frame material of the frame body 3 has cross-sectional performance capable of withstanding wind load as a design load, and when an impact load is applied, either or both of the upper frame 6 and the lower frame 7 undergo plastic deformation to allow the impact load to be released, thereby preventing damage to the sound-insulating panel 2 even when an impact force is applied to the sound-insulating panel 1.

[0074] Furthermore, according to the sound-insulating panel 1, even if an impact force is applied, the sound-insulating plate 2 remains attached to the frame body 3 (mounting grooves 65, 74, 53), and the sound-insulating plate 2 does not come off the frame body 3 and become suspended, thereby reducing the risk of the impacting object falling to the outside through the space opened up when the sound-insulating plate 2 comes off.

[0075] In addition, according to the sound-insulating panel 1, the sound-insulating plate 2 does not come off the frame 3 and is not left hanging, so the structure is stable and safe until the deformed sound-insulating panel 1 is replaced.

[0076] Furthermore, according to the sound-insulating panel 1, the bending rigidity of the lower frame 7 is lower than the bending rigidity 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-like shape with the center protruding outward.

[0077] The sound insulation panel 1 according to the embodiment of the present invention has been described in detail above. However, the above-mentioned or illustrated embodiments are merely specific embodiments for carrying out the present invention, and the technical scope of the present invention should not be interpreted as being limited by the illustrated embodiments. [Explanation of symbols]

[0078] 1,1': Soundproof panel (panel frame) 2: Soundproofing board (board material) 3: Frame 4: Horizontal frame 5: Vertical frame 50: Vertical frame body 51: Edge material 52: Outer box part 52a: Bishole 53: Mounting groove (mounting groove) 54: Inner wall 55:Protruding wall 6: Top frame (horizontal frame) 60: Upper frame body (horizontal frame body) 61: Edge 61a: Support side 61b: Contact area 61c: Vertical side 61d: Rivet hole 62: Outer box part 63: Upper box section 64: Inner wall 65: Mounting groove 7: Bottom frame (horizontal frame) 70: Lower frame body (horizontal frame body) 71: Outer box part 71a, 71b: Hole (cross-sectional defect) 72: Lower part 73: Inner wall 74: Mounting groove G1: Gasket G2: Vertical frame sealant M1: Round ring r1: rivet

Claims

1. 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 cross-sectional defect portion is a through hole that vertically penetrates the upper and lower surfaces of the hollow cross-section. A panel frame characterized by:

2. The plate material is inserted and clamped in a mounting groove formed in the frame body without a hole through which a fixing member for fixing the plate material to the frame body is inserted. The panel frame according to claim 1 .

3. The cross-sectional loss portion is provided in a plurality of positions symmetrically with respect to the longitudinal direction of the horizontal frame that undergoes plastic deformation. The panel frame according to claim 1 or 2, characterized in that

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