JP7625465B2 - 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 an upper and lower pair of frames , and a pair of vertical frames, and when an impact force acts on the plate material, one or both of the upper and lower frames bend outward and plastically deform while the plate material is fitted into the frame body to absorb the impact force, the plate material is inserted and clamped in a mounting groove formed in the frame body without a hole for inserting a fixing member that fixes the plate material to the frame body, and the lower frame is characterized in that one end of the inner wall of the mounting groove that supports the inside of the plate material is not connected to the bottom surface that forms the mounting groove of the lower frame and is a free end .

The panel frame of the second invention is characterized in that, in the first invention, the upper frame or the lower frame that plastically deforms has an upper frame body or a lower frame body , and a batten material attached to the upper frame body or the lower frame body, and the inner wall is a side wall of the batten material.

The panel frame of the third invention is characterized in that, in the second invention, the pressing material is a member with a U-shaped cross-section with one side open, and is spot-fastened to the upper frame body or the lower frame body so that the open end of the U-shaped cross-section is above the upper frame or below the lower frame .

The panel frame of the fourth invention is characterized in that, in the third invention, the batten material is spot-fixed to the upper frame or lower frame body by riveting or bolting.

The panel frame of the fifth invention is characterized in that, in the fourth invention, the pushing edge material has a support edge portion with a U-shaped cross section that supports the inside of the plate material and is longer than the connecting edge portion that connects the support edge portion to the vertical edge portion on the opposite side.

The panel frame of the sixth invention is characterized in that, in any one of the first to fifth inventions, a gasket made of a rubber elastic material is interposed between the mounting groove and the inner side of the plate material.

The panel frame of the seventh invention is characterized in that, in any of the first to sixth inventions, the mounting groove is formed eccentrically inward from the central axis of the upper frame or the lower frame .
It is characterized by:

The panel frame of the eighth invention is characterized in that, in any of the first to seventh inventions, screw holes are formed in the vertical frame and screws are driven into the upper frame or the lower frame to connect the vertical frame to the upper frame or the lower frame .

The panel frame of the 9th invention is characterized in that, in any of the 1st to 8th inventions, the cross-sectional shape is such that the bending rigidity (EI) of the lower frame is lower than the bending rigidity (EI) of the upper frame.

The panel frame of the 10th invention is characterized in that, in any of the 1st to 9th inventions, the yield stress of the vertical frame is higher than that of the upper frame and the lower frame , and the yield stress of the upper frame is equal to or greater than the yield stress of the lower frame.

According to the first to tenth inventions, the panel frame has a cross-sectional performance capable of withstanding the wind load as a design load by 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 tenth 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 tenth 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 tenth inventions, 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 first to tenth inventions, 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.
Moreover, according to the first to tenth inventions, the inner wall of the mounting groove that supports the inside of the plate is not connected to its bottom, so one end of the inner wall that supports the plate is a free end (cantilever), and the horizontal frame (upper frame and lower frame) can be plastically deformed while the plate of the panel frame is kept attached to the frame body. Therefore, even if an impact force is applied, damage to the plate can be prevented, and the plate does not come off the frame body and become suspended, so 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 particular, according to the second aspect of the present invention, since the ridge is separate from the upper or lower frame , the member that contacts the plate material directly or via a gasket or the like to support it and the member that plastically deforms it can be separate members. This makes it easy to curve and deform the horizontal frame into a bow shape while holding the plate material in the mounting groove.

In particular, according to the third and fourth inventions, the batten is a U-shaped cross-section member with one side open, and is spot-attached to the upper or lower frame body, so that the amount of energy absorbed by the impact force can be easily adjusted by changing the cross-sectional shape of the batten or the interval of the spot attachment. Also, because the structure is simple, the assembly time can be shortened.

In particular, according to the fifth aspect of the present invention, the support edge portion of the batten that supports the inside of the plate is longer than the connecting edge portion, so that even if the inner wall of the horizontal frame body to which the batten is attached is bent inwardly and buckled, the support edge portion can easily maintain the state of pressing and supporting the plate. This makes it easier to plastically deform the horizontal frame into a bow shape while holding the plate in the mounting groove.

In particular, according to the sixth invention, a gasket is interposed between the mounting groove and the plate material, so that the gasket can follow the elastic deformation of the plate material and the angular deformation of the support edge portion to improve the degree of adhesion between the support edge portion and the plate material, thereby improving the reliability of holding the plate material.

In particular, according to the seventh invention, the mounting groove is positioned eccentrically on the inward side, so that the inner side of the upper or lower frame can be bent and crushed while maintaining the integrity of the outer part of the horizontal frame from which the plate material is likely to slip out, making it easier to hold the plate material within the mounting groove while bending the horizontal frame into a bow and plastically deforming it.

In particular, according to the eighth invention, the vertical frame and the upper or lower frame are connected by screws being driven into the horizontal frame, making it easier for the upper or lower frame to rotate relative to the vertical frame around the screws, and further making it easier to curve and deform the upper or lower frame into a bow shape.

In particular, according to the ninth aspect of the present invention, since the lower frame has a lower bending rigidity than the upper frame, the lower frame is curved outward in a bow shape, so that even when the panel frame is installed at the top level, it is possible to reduce the risk of the plate material coming out upward due to an impact force.

In particular, according to the tenth invention, the yield stress of the frame body is vertical frame > upper frame ≥ lower frame, so that the bending rigidity (EI: Young's modulus x second moment of area) sufficient to withstand normal wind loads is ensured while the plastic deformation when an impact force is applied is increased, thereby increasing the energy absorption rate.

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 when the panel frame 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 perspective view seen from the inside, exaggeratedly illustrating a state in which the sound insulation panel of FIG. 1 is plastically deformed when absorbing impact energy. FIG. 7 is an explanatory diagram illustrating the mechanism for preventing the plate material from falling off according to the present invention, in which (a) shows the early stage of plastic deformation of the lower frame, and (b) shows the final stage of plastic deformation of the lower frame. FIG. 8 is a vertical cross-sectional view showing a modified example of the lower frame of FIG.

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 a seamless, integrally formed aluminum alloy frame by extrusion, 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 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 (arc), causing some of the components receiving the compressive force to collapse (buckle) 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 being higher than the height of the outer side, and has an outer box section 62 in the shape of a trapezoid (square) frame located on the outside of the frame cross section, and an upper box section 63 in the shape of a trapezoid (square) frame that connects to the top of the outer box section 62. The upper frame body 60 also has an inner wall 64 that hangs down from the inner bottom 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 the dashed circle in Figure 3 (but symmetrical from top to bottom), the edge material 61 is a strip material with a U-shaped cross section with one side open, with the long side extending horizontally, 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 them. 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.

The length L1 of the support edge 61a is longer than the length L2 of the connecting edge 61b. For this reason, as described in detail later, even if the connecting edge 61b is prone to bending and buckling, and the inner wall 64 to which the edge material 61 is attached is bent inward and buckled, causing significant deformation, the support edge 61a is likely to maintain the state in which it is pressing and supporting the sound insulation plate 2. Note that, since the vertical edge 61c is fixed to the inner wall 64 of the upper frame body 60 at the position of the rivet hole 61d, the length L3 of the vertical edge 61c does not need to be longer than L2, and there is no problem if it is shorter than L1.

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 trapezoidal (rectangular) in shape with a low inner wall located on the outside of the frame cross section, and the inclined bottom surface of this outer box section 71 extends inward to form a lower section 72 that has a U-shaped cross section. The U-shaped cross section of this lower section 72 is shaped to fit into the approximately trapezoidal upper frame body 60 described 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.

((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 impact energy absorption and plate material falling 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 8, taking the above-mentioned sound insulation 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 prevention mechanism of the panel frame of the present invention, in which (a) shows the state before the impact force acts on the sound insulation panel 1, (b) shows the state of the sound insulation panel 1 when absorbing the impact energy, and (c) shows the deformation of only the sound insulation plate 2 when absorbing the impact energy. Also, Figure 6 is a perspective view seen from the inside, which exaggerates and typically shows the state in which the sound insulation panel 1 of Figure 1 is plastically deformed when absorbing the impact energy.

As shown in Figures 5 and 6, in this invention, when an impact force, such as a collision of cargo from a vehicle, that exceeds the wind load at the time of structural design acts on the plate material (sound insulation plate 2), one or both of the pair of upper and lower horizontal frames 4 of the frame body 3 undergo plastic deformation while following the deformation (curvature) of the plate material (sound insulation plate 2), thereby absorbing the impact energy and preventing the sound insulation plate 2, which is a plate material, from being destroyed or separated from 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, so it is 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, the upper frame 6 is provided with an upper box section 63 at a position on the compression side when the panel is bent, and the lower frame 7 is provided with a cross-sectional shape that does not have a rectangular frame-shaped closed section at a corresponding position. 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, the sound insulation panel 1 not only reduces the risk of the plate material 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 also reduces the risk of an impacting object 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).

The lower frame 7, which is plastically deformed, has an outer box section 71 with high cross-sectional performance (second moment of area and section modulus) at a position on the outside of the soundproofing plate 2, while a U-shaped embossing material 61 with an open lower side and low cross-sectional performance is simply attached by spot fastening to a position on the inside of the soundproofing plate 2. As a result, when absorbing impact energy, the lower frame 7 bends in a bow shape with the center protruding outward, and buckles locally at the intervals of the spot fastening, inducing the inner part of the plate material (soundproofing plate 2) to bend and crush and plastically deform (see Figure 6).

Furthermore, as mentioned above, in the soundproofing panel 1, 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 lower 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 the lower frame 7 to deform in a bow-like curve.

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. 8, 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. 8 is a vertical cross-sectional view showing a modified lower frame.

However, by making the lower frame body 70 (horizontal frame body) and the batten 61 separate bodies as in the sound insulation panel 1 of this embodiment, the member that supports the inside of the sound insulation board 2 and the member that plastically deforms it can be made into separate members. This makes it easy to curve and deform the lower frame 7 into a bow shape while holding the sound insulation board 2 in the mounting groove 74.

Next, the plate material falling prevention mechanism of the present invention will be described in more detail with reference to FIG. 7. FIG. 7 is an explanatory diagram for explaining the falling prevention mechanism of the sound insulation plate 2, which is the plate material of the present invention, in which (a) shows the initial stage of plastic deformation of the lower frame 7, and (b) shows the final stage of plastic deformation of the lower frame 7. As shown in FIG. 7(a), when an impact force acts on the sound insulation panel 1, first, the boundary portion between the support edge portion 61a and the connecting edge portion 61b of the pressing edge material 61 elastically deforms and plastically deforms with the elastic deformation of the sound insulation plate 2, and the lower end of the support edge portion 61a enters inward. Then, as shown in FIG. 7(b), the restoring force (repulsion force) due to the deformation of the pressing edge material 61 causes the inner wall 73, which has weak bending rigidity, to become a free end (cantilever), and the inner wall 73, which has weak bending rigidity, falls inward from the base end portion near the boundary with the lower portion 72, and the lower frame 7 bends and buckles.

In this case, in the sound insulation panel 1 according to this embodiment, as described above, the length L1 of the support edge portion 61a of the edging material 61 is longer than the length L2 of the connecting edge portion 61b, so that as the inner wall 73 falls inward, as shown in FIG. 7(b), the support edge portion 61a of the edging material 61 is curved, and the sound insulation plate 2 is pressed more strongly against the outer box portion 71 near the lower end of the support edge portion 61a. Therefore, in the sound insulation panel 1, even if the lower frame 7 is plastically deformed, the sound insulation plate 2 is held in the mounting groove 74.

In addition, as shown in FIG. 7, a gasket G1 is interposed between the support edge portion 61a and the sound insulation plate 2. The gasket G1 follows the elastic deformation of the sound insulation plate 2 and the angular deformation of the support edge portion 61a, improving the degree of adhesion between the support edge portion 61a and the sound insulation plate 2, and the sound insulation plate 2 can be securely held 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 sound insulation 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 bent and buckled, 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: 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 72: Lower portion 73: Inner wall 74: Mounting groove G1: Gasket G2: Vertical frame seal material M1: Round ring r1: Rivet

Claims (10)

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 frames, and a pair of left and right vertical frames,
When an impact force is applied to the plate material, one or both of the pair of upper and lower frames are curved outward and plastically deformed while the plate material is fitted in the frame body to absorb the impact force,
The plate material is inserted into 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 lower frame is a panel frame characterized in that one end of an inner wall of the mounting groove that supports the inside of the plate material is a free end that is not connected to a bottom surface that forms the mounting groove of the lower frame. The upper frame or the lower frame that is plastically deformed has an upper frame body or a lower frame body, and a pressing material attached to the upper frame body or the lower frame body,
The panel frame according to claim 1 , wherein the inner wall is a side wall of the batten. The panel frame described in claim 2, characterized in that the pressing material is a member with a U-shaped cross section with one side open, and is spot-fastened to the upper frame body or the lower frame body so that the open end of the U-shaped cross section is above the upper frame or below the lower frame . The panel frame according to claim 3 , characterized in that the batten is spot-fastened to the upper frame or the lower frame body by riveting or bolting. The panel frame of claim 4, wherein the pressing material has a support edge portion having a U-shaped cross section that supports the inner side of the plate material and is longer than a connecting edge portion that connects the support edge portion to the vertical edge portion on the opposite side . 6. The panel frame according to claim 1 , wherein a gasket made of a rubber elastic material is interposed between the mounting groove and an inner side of the plate material. 7. The panel frame according to claim 1 , wherein the mounting groove is formed eccentrically inward from a central axis of the upper frame or the lower frame . A panel frame as described in any one of claims 1 to 7, characterized in that screw holes are formed in the vertical frame, and screws are driven into the upper frame or the lower frame to connect the vertical frame to the upper frame or the lower frame . 9. The panel frame according to claim 1 , wherein the lower frame has a cross-sectional shape such that a bending rigidity (EI) of the lower frame is lower than a bending rigidity (EI) of the upper frame. A panel frame as described in any one of claims 1 to 9 , characterized in that the yield stress of the vertical frame is higher than those of the upper frame and the lower frame , and the yield stress of the upper frame is equal to or greater than the yield stress of the lower frame.

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