JP7149669B1 - One-touch mounting type seismic isolation coil - Google Patents

Abstract

[Problem] To be installed easily in a short period of time without the need for work such as fixing to the ceiling with screws, metal fittings, etc., replacing cords and sockets, etc., to existing lighting, etc. suspended from the ceiling, and preventing earthquake damage. To provide a seismic isolation device capable of suppressing shaking and preventing damage such as falling or breaking. A holder 3 with coils 1 and 2 inserted therein is attached to a cord 5a of an existing lighting 5 using a magic band 4 to prevent an earthquake, etc., from occurring. When the swinging occurs, the coil bends while restraining the movement of the cord 5a at the part where the holder 3 is attached, absorbing the swinging energy and preventing the illumination 5 from swinging greatly. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to a seismic isolation device and equipment for suppressing shaking caused by an earthquake or the like and preventing damage such as falling or breaking of objects suspended from the ceiling.

In Japan, since ancient times, earthquakes have caused great damage to people, buildings, household goods, equipment, etc., and many seismic dampers, seismic isolation devices and equipment have been developed to protect them from shaking. It's here.
There are many seismic isolation devices and fixtures that protect lights and other fixtures hanging from the ceiling from shaking, and they include ropes and chains that are stretched diagonally from the ceiling, seismic isolation rubbers, springs, and devices that slide horizontally. When installing them, it was necessary to fix them to the ceiling using screws, metal fittings, or the like, or to replace cords and sockets.

As a countermeasure against an earthquake, a rope is stretched between the upper and lower frames, and the guide stand is roped using the table and hanger combined seismic isolation device of Japanese Patent Application No. 2021-166542 and PCT/JP2021/41869 (Japanese Patent Application No. 2022-502247). Invented a seismic isolation device that restrains the movement by contacting the There was also a disadvantage that the position of the object to be hung was lowered by the same amount.

In addition, in order to compensate for the above-mentioned shortcomings, we devised a device that can be easily attached to existing lighting, etc. suspended from the ceiling with the one-touch attachment type seismic isolation device of Japanese Patent Application No. 2022-001232. In the case of , there was a disadvantage that when an earthquake suddenly caused a strong horizontal shaking, it would shake greatly only in the first half of the shaking period.

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The problem to be solved is that it can be installed easily and in a short time without the need to fix it to the ceiling with screws or metal fittings, or to change the cord or socket to the existing lighting that is suspended from the ceiling. To provide a seismic isolation device capable of suppressing shaking caused by an earthquake and preventing damage such as falling or breaking.

The main components of the seismic isolation device of the present invention are upper and lower coils, holders, and magic bands. The structure is such that when a swinging occurs due to such a reason, the coil bends while restraining the movement of the cord 5a at the part where the holder 3 is attached, absorbing the swinging energy, and preventing the illumination from swinging greatly.

The effect of the seismic isolation device of the present invention is that it does not require work such as fixing the existing lighting fixtures suspended from the ceiling with screws or metal fittings to the ceiling, or replacing cords or sockets, so it can be done easily and in a short time. It has the advantage of suppressing shaking caused by an earthquake and preventing damage such as falling or breaking.
In addition, no matter which direction an earthquake starts shaking from, the seismic isolation device can restrain the movement of cords of existing hanging equipment from the first shaking to prevent large shaking.

A side view showing an embodiment of this seismic isolation device Fig. 1 is a plan view of the range from the ceiling side to the cross section (A-A) of the holder Plan view of Fig. 1 viewed from the bottom side of the cross section (A-A) of the holder Side view showing the lighting swinging to the right Side view showing the lighting swinging to the left

An example of an embodiment of the present invention is shown below.
Fig. 1 is a side view of an example in which this seismic isolation device is attached to an existing lighting or the like suspended from the ceiling. A lower coil 2 bent by being pressed against an existing lighting 5, two holders 3 having the coils inserted into holes, and a magic band for fixing the holder 3 by sandwiching a cord 5a from which the existing lighting 5 is suspended. It is roughly divided into 4.

The upper coil 1 is made of a metal wire or the like, and the upper end of the conically wound 4 or 5 turns is horizontally wound for about three-fourths of the turn (270°). The part is lightly pressed against the ceiling.
Also, if the cord 5a suspended from the ceiling is passed through the slightly opened portion of the upper end and turned by the same number of turns, the cord 5a can be attached through the center as shown in this figure without removing the cord 5a from the socket 6a. .

The lower coil 2 is also made of the same wire as the upper coil, and the lower end of the coil, which is conically wound two or three times, is horizontally wound for about three-fourths of the turn (270°). This part is lightly pressed in contact with the existing lighting 5.
Also, like the upper coil, it can be attached as shown in this figure by passing the cord 5a through the slightly opened lower end and turning it by the number of turns.

Two holders 3 made of metal, plastic or the like are integrated by inserting the tips of upper and lower coils 1 and 2 into holes.
The two holders 3 are fixed with a magic band 4 so as to sandwich the cord 5a of the existing lighting 5 suspended from the ceiling 6. - 特許庁

The magic band 4 is adhered to one of the two holders 3, and the two holders 3 into which the coils 1 and 2 are inserted and the guard plate 3a are wound and fixed with one touch so as to sandwich the cord 5a of the existing lighting 5. You can do it.

FIG. 2 shows a plan view of FIG. 1 as viewed from the ceiling side to the cross section (AA) of the holder 3 .
Approximately three-fourths (270°) of the helical outer circumference of the upper coil 1 is in contact with the ceiling and lightly pressed against the ceiling, so that the direction in which the cord 5a is tilted no matter which direction the shaking due to the earthquake occurs. The coil part bends to absorb the swinging energy, and the swinging of the part above the holder 3 can be quickly damped.

FIG. 3 shows a plan view of FIG. 1 as seen from below from the cross section (AA) of the holder 3 .
About three-fourths (270°) of the helical outer circumference of the lower coil 2 is in contact with the lighting 5 and lightly pressed against it, so that the coil part is tilted in the same direction as the upper coil 5a. It bends to absorb swinging energy, and the swinging of the portion below the holder 3 can be quickly damped.

The upper coil 1 and the lower coil 2 are made to have different sizes or different wire diameters, and the natural period of the cord 5a is divided into the oscillation radii of different natural periods of the R1 part and the R2 part. By doing so, an external force with a constant period due to long-period vibrations generated by a large earthquake occurring in the distance is added, and even if the natural period of one of them matches the period of the external force, it will not match the other. Since the three periods do not continue, the resonance phenomenon is less likely to occur, and it is possible to prevent the illumination 5 from swaying greatly like a cradle.

Furthermore, a guard plate 3a having an L-shaped cross section is sandwiched upward along the cord 5a between the holder 3 on one side and the cord 5a.

FIG. 4 shows a state in which the light 5 swings to the right, and the swing radius of the upper part from the holder 3 at this time is R2 It has become.

FIG. 5 shows a state in which the light 5 swings to the left, and the swing radius of the upper part from the holder 3 at this time is from the suspension fulcrum P1 of the cord to the inflection point P3 of the tip of the guard plate 3a. It is R3 between

In this way, only when the illumination 5 swings toward the guard plate 3a side, the guard plate 3a comes into contact with the code and moves the inflection point of the code, and the swing radius changes every half cycle of the swing, and the natural period also changes. This makes it difficult for the resonance phenomenon to occur even if an external force with a constant period is applied.

Since the guard plate 3a has an L-shaped or semi-cylindrical cross section and is attached only to one side, even if the direction of swaying is back and forth or obliquely, it will be the same as the left and right swaying state in FIGS. 4 and 5. , the inflection point of the chord is moved to make the resonance phenomenon less likely to occur.

This fixture can be installed easily and quickly without fixing it to the ceiling with screws or metal fittings, or replacing cords or sockets. Since it does not fall down, it has the advantage of being easy to use even in a room with a low floor-to-ceiling height.

In addition, by installing this device, the resonance phenomenon occurs due to the function of dividing the natural period of the existing suspended cord into different natural periods vertically, and the function of changing the natural period every half period of the oscillation. Lighting, decorations, information boards, etc. that are suspended in high places such as stations and halls, as well as high floors of buildings that are prone to shaking due to long-period vibrations caused by a large earthquake in the distance. If you attach it to the cradle, you can prevent it from swinging like a cradle and make it less likely to break or fall.

REFERENCE SIGNS LIST 1 upper coil 2 lower coil 3 holder 3a guard plate 4 magic band 5 existing lighting 5a existing suspension cord 6 ceiling 6a socket
Suspension fulcrum of P1 cord
Inflection point of the chord constrained by the P2 holder
P3 Inflection point of the chord constrained by the guard plate
R1 Oscillation radius from holder to illumination
Rotation radius from R2 cord suspension fulcrum to holder
Rotation radius from the hanging fulcrum of the R3 cord to the upper edge of the guard plate

Claims (3)

The main components are an upper coil, a lower coil, a holder, a magic band, etc., and the two holders into which the upper coil and the lower coil are inserted can be attached to the existing hanging lighting by using a magic band. It is installed by winding the cord with the upper coil in contact with the ceiling, and the lower coil is in contact with the hanging lighting, etc., so that it can be fixed to the ceiling with screws or metal fittings, or the cord or socket can be replaced. It can be easily installed in a short time without any work, and when vibration occurs due to an earthquake, etc., the part where the two holders are attached constrains the movement of the cord, while the upper and lower coils absorb the vibration energy. A seismic isolation device characterized in that it has a structure that prevents a hanging type lighting or the like from swaying greatly. By using different sizes and wire diameters for the upper and lower coils and dividing the natural period of the existing cord, etc., into different natural periods, the resonance phenomenon is less likely to occur. The seismic isolation device according to claim 1, characterized in that: A guard plate is attached between the holder on one side of the two holders and the cord, and only when the lighting, etc. swings toward the guard plate side, the guard plate sticks to the cord and moves the inflection point of the swing. 2. A seismic isolation device according to claim 1, characterized in that the natural period is also changed by changing the radius of oscillation for each half period of the oscillation, thereby making it difficult for the resonance phenomenon to occur.

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