JPH084363A - Screen body - Google Patents

Abstract

PURPOSE:To remove rasping noises generated at the time of a strong wind by a simple structure by mounting a reinforcing plate for vibrationproofness and an extension stringer on a screen body consisting of a looper type panel. CONSTITUTION:Stringers 5 have a plurality of engaging pawls 7 at regular intervals on both sides along the longitudinal direction of tieplates. A plurality of the stringers 5 as bars formed by bending the bars in lines in the longitudinal direction so that both sides are faced oppositely are fixed on each side face of base frames 2 at regular intervals, where wind pressure and thermal deformation are considered, in the vertical direction through connecting members 8, and a plurality of panels 4 are disposed to these stringers 5 in the lateral direction, and installed elastically to each engaging pawl 7 by engaging sections 6. Reinforcing plates 9 for vibrationproofness are engaged and set up elastically at the central sections of each panel 4 from the rear sides. The reinforcing plates 9 for vibrationproofness may also be mounted at arbitrary places regardless of the positions of the stringers at that time. Accordingly, the natural frequency of the panels can be brought to an audible sound region or more, thus preventing the generation of rasping noises.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen body for blinding equipment on a roof of a building or equipment attached to the building or for use as a fence.

[0002]

2. Description of the Related Art Since an elevator ridge on the roof of a building, a cooling tower, an external staircase attached to the building, a storage room, etc. often impair the appearance of the entire building, they are blindfolded by a screen body. Such a screen body has a screen surface in which a plurality of louver-shaped panels are arranged at regular intervals, and has a smart appearance,
In addition, it is widely used because the distribution of outside air is good. Such screens are sometimes used as a blind for handrails of pedestrian bridges and viaducts, or as a fence that divides the site.

On the screen surface of the screen body, a plurality of elongated louver-shaped panels are arranged vertically, horizontally or diagonally, and each is attached by engaging the engaging claws of the stringer by utilizing the elasticity of the panels themselves. There are many things. However, in such a screen body where the panel and the stringer are weakly attached to each other, the panel vibrates and emits a sound when the place where the wind is strong. This sound can be quite annoying in quiet nights.

FIG. 6 shows the result of the noise level measured on a screen surface, in which a large number of louver panels are vertically attached at intervals, under an environment of a wind speed of 17 m, and is displayed by being divided into a plurality of frequencies. Human audible range is 20 ~
At 2000 Hz, it is audibly annoying that there is a protruding sound, and in the case of this experiment, there is a protruding portion in the band centering on 125 Hz, and it protrudes from the surrounding sound with a size of about 69.2 dB.

When the air flow is examined on the screen surface of the same form in a wind tunnel experiment or the like, in a strong wind with a wind speed of 17 m, a vortex is generated on the back surface side of the panel due to the air flow passing through the gap between the panels, and this vortex is the wind pressure. It can be seen that it vibrates intricately due to the subtle fluctuations in. The mechanism of the panel vibration is not simple because it relates to the strength and direction of the wind, the size of the gap between the panels, the cross-sectional shape of the gap, etc., but the frequency of the vortex generated on the back side of the panel and the natural frequency of the panel It has been found that when the frequencies are in the audible range, the sound becomes more prominent than the surrounding sound and becomes a noise.

[0006]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention An offensive sound generated from a screen body in a strong wind is eliminated with a simple structure.

[0007]

A louver-shaped panel is mounted on a stringer to form a screen surface, and a vibration-proof reinforcing plate is mounted on the panel.
In addition to installing a vibration-proof reinforcement plate, at least a part of the back surface of the panel should have a damping material placed in close contact with the panel, or a stringer that engages and supports the panel between standard stringers, or a stringer. It is also possible to add a vibration damping material and place the damping material on the panel.

[0008]

[Function] The anti-vibration reinforcing plate and extension stringer attached to the louver type panel make the natural frequency of the panel above the audible range. When these are used together with the damping material, this effect is reinforced.

[0009]

FIG. 3 is a first embodiment and shows a screen body 1 constructed on the roof of a building, in which a base frame 2 assembled in a rectangular parallelepiped shape and a screen surface formed on each outer surface thereof. 3 and 3. The screen surface 3 is composed of a plurality of louver-shaped panels 4 and a plurality of stringers 5 (FIG. 4). The panel 4 is formed by cutting an extruded aluminum alloy material, and each has a C-shape that is stretched in cross section. That is, the panel 4 has the engaging portions 6 and 6 formed by being wound around the back surface on both sides along the longitudinal direction (FIG. 1).

The stringer 5 is a bar member formed by pressing the shapes of the engaging claws 7, 7 on both sides along the longitudinal direction of the strip plate, and then bending the both sides with lines in the longitudinal direction so as to face each other. , A plurality of engaging claws 7 at predetermined intervals along the longitudinal direction
(Fig. 4). A plurality of stringers 5 are fixed to each side surface of the base frame 2 through a connecting member 8 in the vertical direction at a predetermined interval (standard arrangement) in consideration of wind pressure and thermal deformation. 4 are arranged in the lateral direction and attached to the respective engaging claws 7 by the engaging portions 6.
At the time of mounting, the engaging portion 6 is elastically deformed and fits into the engaging claw 7, and is elastically mounted. Then, a vibration-proof reinforcing plate 9 is fitted and attached to the central portion of each panel 4 from the back side (FIGS. 1 and 7). The anti-vibration reinforcing plate 9 has mounting portions formed by bending along both side edges of the panel 4,
Since this part is elastically engaged and mounted on both sides of the panel 4, it is easily mounted without using screws or the like. The anti-vibration reinforcing plate 9 may be formed separately regardless of the panel 4, but an end material of the panel 4 may be used, which is more convenient in terms of cost. When the anti-vibration reinforcing plate 9 is attached to the back side of the panel,
The appearance of the screen body 1 is rarely impaired. The antivibration reinforcing plate 9 may be attached to the front surface side of the panel 4. With this structure, the anti-vibration reinforcing plate 9 can be attached to any position regardless of the position of the stringer.

When the screen body 1 was placed in an environment with a wind speed of 17 m, no offensive sound was produced. That is, as shown in FIG. 6, the sound emitted from the screen body 1 is divided into frequencies and the intensity is examined. As shown in FIG.
It is 6.0 dB, and the protrusion around 125 Hz is blunted and the whole is smooth. It is considered that this is because the natural frequency of the panel 4 was changed by mounting the anti-vibration reinforcing plate 9. The anti-vibration reinforcing plate 9 may be attached not only at the central portion (FIG. 7) between the portions of the panel 4 supported by the stringers 5 and 5 but also at several portions of each panel 4 ( 8), the number, the position, etc. are not limited. Moreover, even if it is mounted only on the selected panel 4, there is almost the same effect.

FIG. 2 shows the screen surface 3 in the second embodiment, in which two extension stringers 11 capable of engaging and supporting the panel 4 are arranged between two stringer 5 of standard arrangement on the left and right of the screen surface 3. The pitch of the stringers 5 is reduced. Other than that, there is no particular difference from the case of the first embodiment. The additional stringer 11 has substantially the same structure as the normal stringer 5, is attached to the base frame 2, and is provided with an engaging claw 7, to which the engaging portion 6 of the panel 4 is elastically mounted.

Even with this configuration, no offensive sound was generated in an environment of a wind speed of 17 m. Screen body 1
In the intensity (Fig. 9) obtained by dividing the sound emitted from the sound into frequencies, a slight level increase was seen in the low-pitched part from 125Hz, but it was 67.6dB at 125Hz.
The protrusion near Z is blunted and the whole is smooth. It is considered that this is because the natural frequency of the panel 4 changed due to the attachment of the additional stringer 11. Unlike the normal stringer 5, the additional stringer 11 may not be fixed to the base frame 2 but only the upper and lower panels 4 and 4 may be joined together, and only the selected panel 4 may be connected. Almost the same effect is exhibited even with a structure in which they are supported together.

FIG. 10 shows a screen body according to a third embodiment in which the vibration-proof reinforcing plate 9 is mounted, an additional stringer 11 is provided, and the other structure is the same as that of the first or second embodiment. The intensity of the sound emitted from 1 is shown by dividing it into frequencies. Wind speed of 17m
There was no offensive noise in the environment. 12
You can see a slight level up in the low range from 5Hz,
At 125Hz, it is 64.9dB, and the blunting of the protrusion near 125Hz is remarkable. Also, the whole is smooth. The additional stringers 11 are arranged between the standard arrangement stringers 5 and between the vibration-proof reinforcing plates 9 and 9 mounted on the panel 4.

FIG. 11 shows a fourth embodiment in which an additional stringer 11 is provided and an oil clay 10 (oil soil) is also used as a damping material in the additional stringer 11, and the other structure is the same as that of the second embodiment. The intensity of the sound emitted from the screen body 1 divided into frequencies is shown. Even with this configuration, no offensive sound was generated in an environment with a wind speed of 17 m. Although there is a slight level increase in the low frequency range from 125Hz, it is 65.0dB at 125Hz, and the whole is smooth. The damping material is preferably an elastomer such as synthetic rubber or a gel material such as clay, which is easily deformable and has good adhesion to the surface.

FIG. 12 shows a vibration-proof reinforcing plate 9 as shown in FIG.
And an additional stringer 11 is installed, and an oil clay 10 is also used as a damping material for the stringer, and the other construction is the same as that of the first, second or third embodiment, which is related to the fifth embodiment. Shows the intensity of the sound emitted from the screen body 1 divided into frequencies. Even with this configuration, no offensive sound was generated in an environment with a wind speed of 17 m. There is no level up in the low-pitched part than 125Hz, and it is 63.6dB in 125Hz, and 125H
The prominence of the protrusion near Z is remarkable. Also, the whole is smooth.

FIG. 14 shows a situation in which the vibration-proof reinforcing plate 9 is mounted and the oil clay 10 (oil soil) is also used.
The oil viscosity 10 is long in the longitudinal direction of the panel 9 in the groove portion formed on the back surface side of the panel, and is arranged in close contact with the panel. The mounting structure of the vibration-proof reinforcing plate 9 is the same as that of the first embodiment. Further, even with this configuration, no offensive sound was generated in an environment with a wind speed of 17 m.

From the above, it is effective to mount the anti-vibration reinforcing plate 9 or to install the additional stringer 11 in order to eliminate the jarring sound generated by the screen body 1, and in addition to these combinations, the oil clay 10 is further added. It can be seen that there is a synergistic effect when such a damping material is used together.

Although the embodiments have been described above, the present invention is not limited to the illustrated specific configuration. Although the screen body 1 in which the panel 4 is arranged in the horizontal direction has been described, the panel 4 may be arranged in the vertical direction (the stringers 5 and 11 are in the horizontal direction). The panel 4 may be made of synthetic resin, and the engagement portion 6 may have various forms. The damping material such as the vibration-proof reinforcing plate 9, the additional stringer 11 or the oil clay 10 can be attached to the existing screen body 1 after the screen body 1 is completed.

[0020]

EFFECTS OF THE INVENTION With a simple structure by mounting a simple member (a vibration-proof reinforcing plate and an additional stringer), it is possible to prevent an offensive sound emitted from the screen body in a strong wind. It can be easily installed on existing screens. Furthermore, the effect of preventing annoying sound can be enhanced by using a vibration damping material together. Since the anti-vibration reinforcing plate has a mounting portion to the panel, the panel mounting is easy and the workability is high. When the vibration damping material is disposed in close contact with the back surface of the panel on at least a part of the back surface of the panel together with the reinforcing plate for vibration damping, the vibration damping effect is improved. Further, even in a crowded place where it is difficult to provide an additional stringer, it is often easy to attach the damping material, so that the damping effect can be improved.

If an additional stringer is provided between the standardly arranged stringers, the number of places where the panel is engaged and supported increases, the natural frequency of the panel in the mounted state increases, and there is an effect of preventing noise. If the vibration-proof reinforcing plate, the additional stringer, and the damping material are arranged in close contact with the back surface of the panel, the damping effect on the panel becomes more reliable. When the vibration-proof reinforcing plate is provided with mounting portions formed by bending along both side edges of the panel, and the mounting portions are elastically engaged with both sides of the panel to be mounted, the mounting to the panel is performed.
Workability is high without the need for screws or adhesives. In addition, it is possible to easily attach and detach the vibration-proof reinforcing plate and adjust the position.

When the vibration-proof reinforcing plate is arranged between the support points of the panel by the stringer, the central part of the amplitude when the panel vibrates is suppressed, so that the vibration-proofing effect is high, and the vibration-proof reinforcing plate is used for the stringer. It does not interfere with the installation and, conversely, does not require any additional processing on the anti-vibration reinforcing plate to avoid stringers. When the anti-vibration reinforcing plate is attached to the back side of the panel, it is not conspicuous and the appearance of the screen body is not spoiled. If you arrange the extension stringer between multiple anti-vibration reinforcing plates mounted on the same panel,
Since there is no interference between the additional stringer and the anti-vibration reinforcing plate at the time of installation, no additional processing is required to avoid interference with these.

When the vibration-proof reinforcing plate is formed from the end material of the long shaped material obtained by cutting out the louver-shaped panel, when the long material has a cross section with bent portions on both sides, the vibration damping having the mounting portion is provided. The reinforcing plate for use can be easily obtained. Moreover, the vibration-proof reinforcing plate is well compatible with the panel. If an additional stringer is provided between the standardly arranged stringers, the central part of the amplitude when the panel vibrates is suppressed, so that the vibration damping effect is great, and it is relatively easy to perform even after the construction. Furthermore, when a damping material is provided on at least a part of the back surface of the panel, the damping effect is further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of a louver-shaped panel (first embodiment).

FIG. 2 is a front view showing a back surface side of a screen surface (second embodiment).

FIG. 3 is a perspective view of a screen body.

FIG. 4 is a side view showing a cross section taken along the line AA of FIG.

FIG. 5 is a diagram showing the intensities of the sound emitted from the screen body divided into frequencies (conventional).

FIG. 6 is a diagram showing the intensities of the sound emitted from the screen body divided into frequencies and examined (first embodiment).

FIG. 7 is a front view schematically showing the aspect of the first embodiment.

FIG. 8 is a front view schematically showing another aspect of the first embodiment.

FIG. 9 is a diagram showing the intensities of the sound emitted from the screen body divided into frequencies and examined (second embodiment).

FIG. 10 is a diagram showing the intensities of the sound emitted from the screen divided into frequencies and examined (third embodiment).

FIG. 11 is a diagram showing the intensities of the sound emitted from the screen body divided into frequencies and examined (fourth embodiment).

FIG. 12 is a diagram showing the intensities of the sound emitted from the screen body divided into frequencies and examined (fifth embodiment).

FIG. 13 is a front view schematically showing the aspect of the fifth embodiment.

FIG. 14 is a perspective view showing a part of a louver-shaped panel (6th embodiment).
Example).

[Explanation of symbols]

 1 Screen Body 2 Base Frame 3 Screen Surface 4 Panel 5 Stringer 6 Engaging Part 7 Engaging Claw 8 Connecting Member 9 Anti-Vibration Reinforcing Plate 10 Oil Clay 11 Additional Stringer

Front page continuation (72) Inventor Minoru Sawayama 70 Hayakawa, Takaoka City, Toyama Prefecture Sankyo Aluminum Industry Co., Ltd.

Claims (11)

[Claims] 1. A structure in which a louver type panel is mounted on a stringer to form a screen surface, and a vibration-proof reinforcing plate having a panel mounting portion is mounted on the panel engaged and supported by the stringer. A screen body characterized by 2. A louver-shaped panel is attached to a stringer to form a screen surface, and a vibration-proof reinforcing plate having an attachment portion to the panel is attached to the panel engaged and supported by the stringer. In addition, the screen body is characterized in that the damping material is disposed on at least a part of the back surface of the panel in close contact with the back surface of the panel. 3. A louver-shaped panel is attached to a stringer to form a screen surface, and a vibration-proof reinforcing plate having an attachment portion to the panel is attached to the panel engaged and supported by the stringer. In addition, the screen body is characterized in that an additional stringer is provided between the standardly arranged stringers, and the panel is engaged and supported by the stringer. 4. A structure in which a louvered panel is mounted on a stringer to form a screen surface, and a vibration-proof reinforcing plate having a panel mounting portion is mounted on the panel engaged and supported by the stringer. The screen body is characterized in that an additional stringer is provided between the standardly arranged stringers to support the panel, and the damping material is further closely attached to the back surface of the panel. 5. The anti-vibration reinforcing plate is provided with mounting portions that are bent and formed along both side edges of the panel, and is mounted by elastically engaging the mounting portions with both sides of the panel. The screen body according to any one of claims 1 to 4. 6. The screen body according to claim 1, wherein the anti-vibration reinforcing plate is attached to the panel between the support points of the panel by the stringer. 7. The screen body according to claim 1, wherein a vibration-proof reinforcing plate is mounted on the back side of the panel. 8. The additional stringer is arranged between standard-arranged stringers and between a plurality of anti-vibration reinforcing plates mounted on the same panel.
Alternatively, the screen body according to claim 4. 9. A louver-shaped panel is formed by cutting a long-shaped material having the same cross section as that of the louver-shaped panel, and the end material of this long-sized material is further cut to form a vibration-proof reinforcing plate having a mounting portion. The screen body according to any one of claims 1 to 9, wherein the screen body is provided. 10. A structure in which a louver type panel is attached to a stringer to form a screen surface, and an additional stringer is provided between standard stringers, whereby the panel is engaged and supported. Characterized screen body. 11. The screen body according to claim 10, wherein a damping material is disposed on at least a part of the back surface of the panel so as to be in close contact with the back surface of the panel.