JPH0674728U - Lattice noise prevention tool - Google Patents

Abstract

(57) [Abstract] [Purpose] For the grid provided on the handrail etc., it is possible to easily and inexpensively prevent the noise caused by the wind. A grid noise prevention tool 8 that can be inserted into and removed from a grid 7 such as a handrail and changes the cross-sectional shape of the grid. By fitting the grid noise prevention tool to the grid, The cross-sectional shape changes, the generation cycle of vortices generated when wind passes is irregular, vibration of the lattice due to vortices is suppressed, and noise of the lattice is prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lattice noise prevention device attached to a stair handrail lattice or a balcony handrail lattice, and particularly to a lattice noise prevention device that prevents noise caused by wind.

[0002]

[Prior art]

 Lattice is provided at the required pitch for the handrails of the stairs and the balcony, and a lightweight member with a hollow cross-section such as aluminum is used for this lattice, and the cross-sectional shape is generally uniform in the longitudinal direction. is there.

[0003]

[Problems to be solved by the device]

 When wind passes through a lightweight grid such as that used for handrails of stairs and Balconi handrails, the vortex generated on the downstream side of the grid causes vibration, and the vortex causes noise in the grid.

That is, as shown in FIG. 6, when the wind 2 blows toward the lattice 1, a cylindrical vortex 3 is generated on the downstream side of the lattice 1. When the generation cycle of the vortex 3 and the natural frequency of the lattice 1 match, the lattice 1 resonates and produces a noise. Further, the adjacent gratings are resonated to amplify the noise. For this reason, the noise is considerably large, which is a problem as noise.

In view of such circumstances, the present invention aims to provide a lattice noise prevention tool that is inexpensive and can easily prevent the noise of the lattice noise.

[0006]

[Means for Solving the Problems]

 The present invention relates to a lattice noise preventing tool that can be inserted into and removed from a lattice such as a handrail and that changes the cross-sectional shape of the lattice.

[0007]

[Action]

 By fitting the lattice noise suppressor to the lattice, the cross-sectional shape in the longitudinal direction of the lattice changes and the cycle of vortices generated when wind passes becomes irregular, and vibration of the lattice due to vortices is suppressed. , The noise of the grid is prevented.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a fence 4 equipped with a lattice noise suppression device according to the present invention.

A grid 7 is provided between the lower side member 5 and the upper side member 6 at a required pitch to form a fence 4. A lattice noise prevention tool 8 can be attached to each lattice 7 at required intervals.

The lattice noise suppression device 8 is formed of an elastic material such as synthetic resin, and as shown in FIG. 3, the inner diameter shape matches the outer shape of the lattice 7, and a part of the cross section is missing. It has a cut hollow shape and can be fitted into and removed from the lattice 7.

If there is a sounding grating 7, as shown in FIGS. 4 and 5, the sounding grating 7 is appropriately fitted. By fitting the lattice noise prevention tool 8 into the lattice 7, the cross-sectional shape changes in the longitudinal direction of the lattice and becomes uneven. Therefore, when the wind passes through the lattice 7, the cycle of the vortex generated downstream of the lattice 7 becomes irregular and the lattice 7 can be prevented from resonating.

In the embodiment shown in FIG. 1, the lattice noise preventing tool 8 is fitted to all of the lattices 7. However, as shown in FIG. 2, every other lattice noise preventing tool 8 is attached. May be fitted together. Alternatively, the lattice noise suppression devices 8 may not be fitted at equal pitches. Further, it goes without saying that various changes can be made, such as changing the fitting pitch of the lattice noise preventing tools 8 of the adjacent lattices 7.

Furthermore, the outer shape of the lattice noise suppressing tool 8 can be appropriately changed according to the design of the lattice 7 to improve the design.

[0015]

[Effect of device]

 As described above, according to the present invention, it is only necessary to fit the lattice noise suppression device to an appropriate portion of the lattice, and it is possible to prevent the noise of the lattice inexpensively and easily. It has various excellent effects such as being applicable to

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention.

FIG. 2 is an explanatory view showing another embodiment of the present invention.

FIG. 3 is a perspective view showing a lattice noise suppression device according to the present invention.

FIG. 4 is an explanatory view showing a relationship between the lattice noise preventing tool and the lattice, and is a view corresponding to an arrow AA view of FIG. 1.

5 is an explanatory diagram showing a relationship between the lattice noise preventing tool and the lattice, and is a view corresponding to an arrow AA view in FIG. 1. FIG.

FIG. 6 is a conventional explanatory view.

[Explanation of symbols]

 1 Lattice 2 Wind 3 Vortex 4 Fence 5 Lower side member 6 Upper side member 7 Lattice 8 Lattice noise prevention tool

Claims (1)

[Scope of utility model registration request] 1. A lattice noise prevention tool which can be inserted into and removed from a lattice such as a handrail and which changes the cross-sectional shape of the lattice.