JP3189086B2 - Collapse prevention equipment for buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for constructing a building in which a strong shaking or vibration acts on the building due to a natural disaster such as an earthquake or a strong wind, or an explosion caused by an explosion of gas or explosive. The present invention relates to a collapse prevention device for a building, which can prevent deformation and collapse of the building by immediately forming a brace.

[0002]

2. Description of the Related Art In buildings such as wooden structures and steel frame structures,
In order to prevent the frame from deforming into a rhombus under horizontal load due to earthquake or wind, and to prevent the building from collapsing due to this deformation,
It is common knowledge in building technology to fix rigid braces between columns of a building to improve strength. These braces are hidden from the inside and outside of the building by the appearance of the building, usually by wall materials or panel materials. However, among these buildings, the ground floor in contact with the ground, in particular, is often used for stores, warehouses, garages, etc., and thus requires large openings and internal spaces. Cannot be provided, and there are many structures which are substantially supported only by the columns.

[0003]

A building in which the first floor in contact with the ground is supported only by struts having no bracing has not necessarily high strength, so that shaking or vibration exceeding a predetermined limit set at the time of design is required. In the event that the structure acts on the building, the columns may be deformed or broken, which may cause irreparable physical damage to the building itself. However, at present, there is no effective reinforcing method in relation to the purpose of use.

SUMMARY OF THE INVENTION In view of the present situation, in the case where a strong shaking or vibration exceeding a predetermined level acts on a building due to an earthquake, wind, or the like, the present invention senses the shaking or vibration and immediately interposes between the opposed struts. It is an object of the present invention to provide a device for preventing collapse in a building capable of reinforcing a building by forming a brace by a cord.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a device for preventing collapse of a building according to the present invention is provided with a vibration sensor which operates by detecting when a predetermined level of shaking or vibration occurs in a building. It consists of a member and a breathing member consisting of a cord body that forms a brace by tensioning diagonally between opposing columns by the operation of the vibration sensing member, and the building does not have more than predetermined shaking or vibration. In a normal state, the breath member holds the gap between the opposed struts in an open state, and forms a brace between the opposed struts only when shaking or vibration exceeding a predetermined level occurs. .

[0006] One of the concrete examples of the device for preventing collapse in a building according to the present invention is a vibration sensing member that operates when a shaking or vibration exceeding a predetermined level occurs in a building, and an operation of the vibration sensing member. A bracing member formed of a cord body that tensions diagonally between opposing struts to form a brace, and a beam or ceiling that connects the blaze member to connect the struts in a state where the brace member does not form a brace. In a normal state where there is no more than a predetermined amount of shaking or vibration in the building, the setting member holds the breathing member in an open state between the opposing columns, and a predetermined amount of shaking. Only when vibration or vibration occurs, the breath member is wound up by the winch against the urging force of the setting member to form a brace between the opposing columns. It is characterized in that the form.

Another specific example of the collapse prevention device for a building according to the present invention is that a slit formed by forming a cylindrical auxiliary column along the longitudinal direction on at least one of opposing columns of the building is formed on the other side. Attaching so as to face the opposing surface of the column, attaching the base end of a breath member made of a cord to a weight member provided vertically movably on the auxiliary column, and moving the distal end of the breath member along the auxiliary column. And lift it upward, pull it out from the slit at the upper end, and follow the beam or the ceiling that connects the columns through an engaging member that interlocks with a vibration sensing member that is rotatably provided at the upper end of the auxiliary column. In the normal state where the building is fixed to the upper end of the other support and the building does not shake or vibrate more than a predetermined amount, the weight member keeps the breath member open between the opposing supports and the shaking or vibration exceeds a predetermined amount. Occurs Operating the saw the engaging member weight member is lowered to the auxiliary strut and is characterized by being configured to form a brace between opposing struts.

[0008] Still another specific example of the device for preventing collapse in a building according to the present invention is that a base end of a breath member formed of a band-shaped cable is provided at the lower end of at least one of the opposing columns of the building. Fixed, the breath member is lifted up along the column, and the distal end is fixed to a hoisting holding mechanism provided at the upper end of the column on the other side via a vibration sensing member provided at the upper end of the column, It is characterized in that the vibration sensing member is operated only when the shaking or vibration of the building exceeds a predetermined level, the breath member is wound up, and a brace is formed between the opposing columns.

In the present invention, the brace member formed of a cord for forming a brace between opposing columns of the building is different from the designed strength of the building, but basically forms a brace in only one direction. However, in order to further increase the strength, it is preferable that a pair is formed so as to form a cross-shaped brace between the columns.

[0010] The breath member for forming the braces between the columns is a cord such as a wire or a rope having a strength capable of withstanding a predetermined vibration value. Braided strips can also be used.

The vibration sensing member for detecting the shaking or vibration of the building more than a predetermined amount and operating the breath member and the transmission means thereof do not obstruct the opening of the building by sensing the shaking or vibration generated. There is no special restriction on the structure as long as the braces can be formed by tensioning the stretched braces between the opposing columns, for example, by detecting vibration and vibration with a vibration sensor, The brace member may be formed in a brace by operating a winch that is linked to the brace, or the brace member may be formed in a brace without using a motor by mechanically sensing vibration or vibration.

[0012]

The collapse prevention device for a building according to the present invention holds a breath member constituting a brace along a column or a beam of the building in a normal state in which the building does not shake or vibrate more than a predetermined amount. An open state was maintained so as not to hinder the entry / exit of goods and equipment and the entry / exit of people from the opening formed between the columns, and provided when the building vibrated or vibrated more than a predetermined amount. The vibration sensing member is actuated to diagonally stretch the breath member between the opposing struts to form a brace, thereby preventing deformation and breakage due to shaking and vibration applied to the struts to prevent the building from being damaged or collapsed.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an apparatus for preventing collapse of a building according to the present invention.
FIG. 1 to FIG. 3 show an embodiment of a fall prevention device in a building according to the present invention.
As shown in FIG. 2, the support is provided at an opening B of a wide frontage formed by a pair of adjacent pillars 13a and 13b on the first floor adjacent to the ground of the building A and a beam 14 connecting these pillars.

As shown in FIG. 1, a collapsing prevention device 1 comprises a pair of breath members 2a and 2b which are basically made of a wire having a predetermined strength, and a pair of struts 13a and 13b which connect the breath members 2a and 2b to each other. A winch 6 having a pair of winding drums for tensioning diagonally to form a brace, a vibration sensing member 7 including a sensor for operating the winch 6, and the breath members 2a and 2b are always loosened. Adjacent pillars 13a, 13b held in a state
And a pair of setting members 8a and 8b for keeping the opening B in and out of the way along the path.

The winch 6 is interlocked with a motor (not shown) capable of rotating forward and backward, and winds up the pair of breath members 2a and 2b in common by forward rotation of the motor, and rotates the breath members 2a and 2b wound up by reverse rotation. It is commonly rewound and loosened, and is provided substantially at the center of the beam or the ceiling connecting the opposing columns 13a and 13b in conjunction with the motor started by the operation of the vibration sensing member 7.

The breath member 2a (2b) is a reinforcing member 14 for reinforcing the base of one of the columns 13a (13b) of the building.
a (14b), the base portion of the breath member 2a (2b) is fixed to the fixing portion 3a (3b), and the support 13
a (13b), and lift the support column 1
The support 13b (13) facing from the upper end of 3a (13b)
The leading end of the winch 6 is wound clockwise from the lower side of one of the drums (clockwise from the upper side of the other drum) via a roller 5a (5b) fixed to the upper end of the winch 6). Things.

The setting member 8a (8b) is made of a relatively thin wire rope. The setting member 8a (8b)
Breath member 2a (2b) located at the upper end of 3a (13b)
b) and fixed to the support 13a.
12a is fixed to the other end of the upper end of the column 13a (13b) via a roller 9a (9b) provided at the upper end of (13b).
(12b), the setting member 8a (8) between the roller 9a (9b) and the fixed 12a (12b) portion.
b) has a pulley 10a (1) having a weight 11a (11b).
0b) is provided.

The setting member 8a (8b), when the breath member 2a (2b) is loosened by the winch 6, as shown in FIG.
The weight 11a (11b) provided in b) descends to
a (13b), and the breath member 2a (2b)
The fixing member 4a (4b) is pulled toward the roller 9a (9b) to move the breath member 2a (2b) to the support 13a (13b).
The opening B is held in an open state along the beam 14. When the winch 6 is actuated by the swing or vibration to wind up the breath member 2a (2b), the breath member 2a (2b) resists the weight of the weight 11a (11b) by the pulling force of the winch 6, as shown in FIG. Pulled
The breath member 2a (2b) tensions diagonally between the columns 13a and 13b to form a brace.

When a vibration exceeding a preset vibration value is detected by the vibration sensing member 7 comprising a sensor, the contact of the switch is closed and the motor of the winch 6 is automatically activated to move the winch 6 in the direction of the arrow. Rotate it,
It has a function of issuing an alarm.

The apparatus 1 for preventing the collapse of a building having such a structure
By the operation described below, a brace can be automatically formed between the opposing columns. In a normal state in which shaking or vibration due to an earthquake or strong wind does not act on the building, the vibration sensing member 7 and the winch 6 do not operate as shown in FIG.
The open state is maintained so that there is no trouble in getting in and out between a and 13b. That is, since the pair of breath members 2a and 2b are not wound on the drum of the winch 6, the weight members 11a and 11b constituting the setting members 8a and 8b are provided.
Therefore, the respective breath members 2a and 2b are in a state where they do not hinder the entrance and exit of the opening B.

In such a state, when a vibration or vibration exceeding the level set in the vibration detecting member 7 occurs in the building due to the earthquake or strong wind, the vibration detecting member 7 detects the vibration and starts the motor of the winch 6 at the same time. The winch 6 is rotated in the direction of the arrow. Due to the rotation of this motor, each breath member 2a, 2b is moved to the weight member 11a, as shown in FIG.
Since each of the breath members 2a and 2b is wound up on the drum of the winch 6 against the load of 11b, the respective breath members 2a and 2b are provided with rollers 5a and
The diagonal tension between the lower end 5b and the fixing portions 3a, 3b at the lower end is used to automatically form an X-shaped brace between the columns 13a, 13b. Therefore, the formed braces can suppress the swinging and vibration of the columns 13a and 13b, particularly the horizontal swinging and vibration, and reliably prevent the building from being damaged or collapsed.

When the vibration of the building is stopped, the motors are rotated in reverse to loosen the respective breath members 2a and 2b wound up by the winch 6, whereby the respective breath members 2a and 2b become
a, 11b by means of the rollers 9a, 9b provided at the upper ends of the columns 13a, 13b as fulcrums.
a, 13b to return to the original state, and the opening B
From here, goods and equipment can be taken in and out, and people can go in and out freely.

The apparatus 1 for preventing collapse in a building is applied between columns on the first floor of a building that contacts the ground, such as a building, a large store, a warehouse, or a garage, which requires a large frontage and is difficult to reinforce by bracing. Thus, a particularly excellent function is exhibited, but it goes without saying that the present invention can be applied even if it is not necessarily the first floor portion. The brace formed between the columns may be a square brace or a double brace, and the number of breath members may be selected according to the required strength.

In this embodiment, the support 13
Since the formation of the brace by the breath members 2a and 2b is performed between the a and 13b using the winch 6 interlocked with the motor,
Since it is possible to cope with a case where a power failure occurs at the same time as the occurrence of an earthquake, in this case, it is desirable to provide a device having an uninterruptible power supply function and to switch to this at the same time as the power failure.

FIGS. 4 and 5 show another embodiment of the apparatus for preventing collapse in a building according to the present invention. In the illustrated example, a single brace is formed between columns, but a pair of breath members is used. Thus, an X-shaped brace can be formed. The collapse prevention device 21 is installed in an opening C of a building formed by a column 32a, a column 32b, and a beam 33 having a relatively narrow frontage. The basic configuration of the device 21 is an auxiliary unit connected to the inside of the column 32a. A support 25,
A weight member 27 which is inserted into the auxiliary support 25 and moves up and down.
And a vibration detecting member 30 for automatically forming a brace between the columns 32a and 32b by sensing the vibration and automatically tensioning the breath member 22.

As shown in FIG. 5, an auxiliary column 25 provided on the opposing surface (inside) of the column 32a opposite to the column 32b is provided along the longitudinal direction at the center of one side surface of a tubular steel material having a rectangular cross section. The auxiliary support 25 has a length slightly shorter than the length of the first floor portion of the support 32a to be mounted, and faces the side surface on which the slit 26 is formed. Support 32a on the back
The slit 26 is opposed to the inside of the opposing column 32b by welding or bolting.

The weight member 27 inserted vertically into the auxiliary support 25 so as to be vertically movable is made of H-shaped steel having a length equal to or less than 1/2 of the auxiliary support 25 and an appropriate weight. Are inserted into the auxiliary support 25 such that the center side connecting the two is parallel to the slit 26 formed in the auxiliary support 25.

The breathing member 22 is made of a wire rope having an appropriate diameter, and its distal end is formed by an annular fixing portion 23 provided at the upper end of a column 32b facing the column 32a.
And a base end portion is fixed to a fixing portion 24 at the lower end of a central side connecting both H-shaped wing sides of the weight member 27 through a slit 26 provided in the auxiliary support 25.

At the upper end of the surface of the auxiliary column 25 facing the column 32b, a slit 26 formed in the auxiliary column 25 in the normal horizontal position at least from the horizontal direction to the vertical direction around the base end portion. The hook member 28 is provided so that the front end portion slightly protrudes from the corner portion of the auxiliary support column 25 across the support column 25.

On the other hand, a spherical weight 29 having a predetermined weight is provided at the distal end of the shaft member on the upper outer wall of the auxiliary support 25 from which the distal end of the engaging member 28 projects, and at the proximal end thereof. A vibration sensing member 30 having a hook portion 31 which engages with a tip end protruding portion of the hooking member 28 is swingably mounted within an appropriate range.

The collapse prevention device 21 having such a structure can automatically form a brace between the columns 32a and 32b by the operation described below. That is, after the weight member 27 having the base end of the breath member 22 fixed to the lower end thereof is pulled up to the upper part of the auxiliary support 25, and the hook member 28 provided on the auxiliary support 25 is passed under the breath member 22, The tip is held horizontally by the hook 31 of the vibration sensing member 30. In this state, the breath member 22 reaches the lower end of the weight member 27 in a form that is bent along the beam 33 along the beam 33 by the locking member 28 locked by the vibration sensing member 30 and passes through the upper side of the locking member 28. The weight member 27 is
It is held in the upper part of the auxiliary support 25, and in a normal state where the building is not shaken or vibrated by an earthquake or a strong wind, the state is maintained as it is, and the building opening C is kept open.

However, when the building is shaken or vibrated more than a predetermined amount due to an earthquake or strong wind, the weight member 29 on the upper part of the vibration sensing member 30 swings, and the swinging movement causes the tip end of the hooking member 28 to move. Since the engagement with the hook portion 31 is released, the locking member 28 rotates downward by the action of the breath member 22 and the weight member 27.

The downward rotation of the hook member 28 causes the weight member 2 fixing the base end of the breath member 22 to move.
7 is an auxiliary support 25 as shown by a dashed line in FIG.
In order to fall down inside, the breath member 22 is
5, the strut is obliquely tensioned between the columns 32 a and 32 b through the slit 26, and a brace can be formed at the building opening C by the breath member 22. Therefore, the formed braces can suppress the swinging and vibration of the columns 32a and 32b, particularly the horizontal swinging and vibration, and reliably prevent the building from being damaged or collapsed.

When the vibration of the building is stopped, the weight member 27 is pulled up to the upper part of the auxiliary support 25, and the hanging member 28 is passed under the breath member 22 in the same manner as described above, so that the vibration sensing member 3 is moved.
By holding horizontally with the hook portion 31 of 0, it is possible to easily return to the original state. Although not shown, a pulling rope is attached to the upper end of the weight member 27, the tip of the rope is hung outward from the upper portion of the auxiliary column 25, and the rope is pulled to pull the weight member 27 up. If this is the case, it is easier to return to the original state.

The collapse prevention device 21 in this embodiment is
By appropriately adjusting the shape of the hook portion that engages with the weight member 29 of the vibration sensing member 30 and the distal end portion of the hooking member 28, the degree of the generated vibration can be dealt with. In particular, the collapse prevention device 21 of this embodiment
The brace can be automatically formed by a purely mechanical configuration without using any power such as a motor,
In addition, the structure is simple and the required equipment is small, so that it is economical.

A collapsing prevention device 41 in a building according to the present invention shown in FIGS. 6 to 8 is for forming a single brace at an opening D of a building formed by a support 52a, a support 52b and a beam 53. is there. The basic configuration thereof is as follows: a breathing member 42, a hoisting holding mechanism 45 provided at the upper end of one of the opposing columns 52 a for winding up and rewinding the breathing member 42, and the breathing member 42 with the other column 52.
It comprises a hooking member 44 provided on the upper part of the support post 52b to draw the upper side of the supporting member 52b, and a vibration sensing member 50 for holding the hooking member 44 detachably.

The breath member 42 is made of a belt-shaped body having a predetermined width and a predetermined toughness secured by weaving a synthetic fiber or a metal filament.

As shown in FIGS. 7 and 8, the hoisting and holding mechanism 45 includes a drum 47 for winding the breath member 42 around a shaft member 46, a coil spring 48 for winding the breath member 42 around the drum 47, The wound breath member 42
The brake 49 is provided coaxially to prevent the unwinding of the brake plate. The brake 49 is provided on the serrated claws of the brake plates 49a and 49b by the bias of a pair of left and right sawtooth brake plates 49a and 49b and a spring 49c. Lever 4 to engage
9d, and has a release function that can release the prevention of rewinding by pulling the string 49e provided on the lever 49d.

The distal end of the breath member 42 is attached to the drum 47 of the hoisting and holding mechanism 45, and the proximal end is fixed to the lower part of the other support 52b.

A column 5 for mounting the hoisting and holding mechanism 45
The engaging member 50a provided on the upper part of the column 52b opposite to 2a keeps a horizontal state in a normal state, and rotates downward from the horizontal state only when a load is applied. At the same time, a weight member 50c is integrally attached to the rear end portion via a cable to form a vibration sensing member 50.

The hook 50b of the engaging member 50a is engaged with the distal end of a breath pulling member 44 for drawing the breath member 42 toward the support 52b. The breath tension member 44 is provided at the upper end of the surface facing the column 52a, and its base end is rotatably attached to the column 52b.
To pull the breath member 42 inside the column 52b along the beam or ceiling.

The weight member 50c constituting the vibration sensing member 50 is normally mounted on a mounting plate 51 provided on a support 52b, and the weight member 50c falls down from the mounting plate 51 and is a breath tension member. By pulling the base end of the engaging member 50a engaged with the lower part 44 downward, the engagement with the breath tension member 44 is released as shown by the dotted line in the drawing, and the breath tension member 44 is released.
Is rotated from the horizontal to the vertical direction downward to cause the breath member 42 to loosen.

The collapse prevention device 41 having the above structure is
If the building vibrates more than a certain amount due to an earthquake or the like,
When the weight member 50c placed on the placing plate 51 falls and the engaging member 50a rotates to release the engagement with the breath tension member 44 and the breath member 42 becomes loose, The breath member 42 is rapidly wound up by the urging force of the spring 48 of the upper holding mechanism 45, and the breath member 42 is tensioned diagonally between the columns 52a and 52b as shown by the dotted line in the figure, thereby automatically forming the brace. Things.

At this time, if a rewinding pulling force is generated in the breath member 42 due to the subsequent vibration, the lever 49d of the brake 49 is engaged with the saw-like claw of the brake plate 49a to prevent the rewinding, and the vibration is prevented. If stops, lever 4
After pulling the string 49e provided at 9d to release the prevention of rewinding and freely rewind, the weight member 50c is returned to the mounting plate 51, and the engagement of the vibration sensing member 50 is performed. By locking the member 50a to the breath tension member 44, the opening D can be in a state without brace.

The breath member 4 used in this embodiment
2 can use a tough band-shaped body and has a simple structure, and can be effectively used without being unattended by being attached to each room of a building. In addition, instead of the above-mentioned weight member 50c, a radio with a light is used as a weight, and when a vibration exceeding a predetermined level generated by an earthquake or the like is detected, the lighting of the radio with the light and the radio broadcast are automatically turned on. By doing so, it is possible to accurately grasp the surrounding situation and the occurrence of a disaster at night.

[0046]

The apparatus for preventing collapse of a building according to the present invention is capable of moving a breath member, which forms a brace between opposing columns, into and out of an opening of a building in a normal state in which the building does not shake or vibrate more than a predetermined amount. When the building is shaken or vibrated more than a predetermined amount without any hindrance, the brace member is tensioned diagonally between the opposing columns by the provided vibration sensing member to automatically form a brace. It is intended to prevent the building from being damaged due to deformation or breakage of the column due to shaking or vibration applied to the column.

[Brief description of the drawings]

FIG. 1 is a front view showing an attached state of an embodiment of a fall prevention device in a building according to the present invention.

FIG. 2 is a front view of the use state of the collapse prevention device in FIG. 1;

FIG. 3 is a perspective view showing an example of a building to which the collapse prevention device of FIG. 1 is applied.

FIG. 4 is a front view showing another embodiment of the device for preventing collapse in a building according to the present invention.

FIG. 5 is a partially cutaway perspective view showing a main part of the collapse prevention device of FIG. 4;

FIG. 6 is a front view showing still another embodiment of the device for preventing collapse in a building according to the present invention.

7 is an explanatory diagram of a hoisting and holding mechanism in the collapse prevention device of FIG. 6;

FIG. 8 is an explanatory view showing a brake in the hoisting holding mechanism of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fall prevention device in a building 2a, 2b Breath member 3a, 3b Fixing part 4a, 4b Fixing (part) 5a, 5b Roller 6 Winch 7 Vibration sensing member 8a, 8b Setting member 9a, 9b Roller 11a, 11b Weight member 13a , 13b prop 14 beams

Claims (10)

(57) [Claims] 1. A brace is formed by diagonally tensioning a vibration-sensing member that operates when a building is shaken or vibrating more than a predetermined amount and that is actuated by operating the vibration-sensing member. In a normal state where there is no more than a predetermined amount of shaking or vibration in the building, the breathing member holds the gap between the opposing struts in an open state, and more than a predetermined amount of shaking or vibration. A fall prevention device for a building, characterized in that a brace is formed between opposing columns only when a failure occurs. 2. The collapse prevention device for a building according to claim 1, wherein a pair of the brace members are formed so that braces intersect between opposing columns. 3. A brace is formed by diagonally tensioning a vibration-sensing member that operates by sensing when a predetermined level of shaking or vibration occurs in a building, and an opposing column by operating the vibration-sensing member. A breathing member consisting of a cord and a setting member for holding the blaze member along a beam or a ceiling connecting the columns in a state where the breathing member does not form a brace, and In a normal state where there is no more than a predetermined amount of shaking or vibration, the setting member holds the breath member in an open state between the opposing columns, and resists the urging force of the setting member only when a certain amount of shaking or vibration occurs. A brace member is wound up by a winch to form a brace between opposing struts, thereby preventing the collapse of the building. 4. The breath member has its base end fixed to the lower end of one of the opposing columns, and is stretched upward along the column, and then its distal end is connected to the upper end of the other column. A brace member fixed to a beam or a winch provided at the center of the ceiling via a roller provided at the center of the ceiling, and extended upward along the column, In the normal state where the building is not shaken or vibrated more than a predetermined amount, the breath member is opened between the opposing columns by the weight provided on the setting member in a normal state where the building is not shaken or vibrated more than a predetermined amount. In this state, the breath member is wound up by the winch against the urging force of the weight only when shaking or vibration exceeding a predetermined level occurs, and a brace is formed between the opposing columns. The collapse prevention device for a building according to claim 3, characterized in that: 5. A cylindrical auxiliary support is mounted on at least one of the opposing supports of the building so that a slit formed along the longitudinal direction faces the opposing surface of the other support, and the auxiliary support is vertically moved. A base end of a breath member made of a cable body is attached to a freely provided weight member, and a distal end of the breath member is lifted upward along the auxiliary support and pulled out from a slit at an upper end, and the upper end of the auxiliary support is Along the beam or ceiling that connects the columns via an engaging member that interlocks with a vibration sensing member that is rotatably provided in the section, and then fixed to the upper end of the other column, the building swings more than a predetermined amount. In a normal state where there is no vibration or vibration, the weight member holds the breath member in an open state between the opposing columns, and the engagement member operates only when a predetermined amount of shaking or vibration occurs to operate the weight member. Descends in the auxiliary column, A collapse prevention device for a building, wherein a brace is formed between opposing columns. 6. The engaging member is normally orthogonal to a slit formed in the auxiliary column, and a tip end thereof is engaged with a vibration sensing member rotatably provided at an upper end portion of the auxiliary column. The horizontal state is maintained, the vibration sensing member is actuated only when the building shakes or vibrates more than a predetermined amount, the engagement with the engaging member is released, and the engaging member rotates downward. The collapse prevention device for a building according to claim 5, wherein 7. A base end portion of a breath member made of a strip-shaped cord is fixed to a lower end portion of at least one of the opposite struts of the building, and the breath member is lifted upward along the strut. The front end is fixed to a hoisting holding mechanism provided at the upper end of the support on the other end via a vibration detection member provided at the upper end of the support, and the vibration detection member is used only when shaking or vibration exceeding a predetermined level occurs in the building. Is actuated to wind up the breath member and form a brace between opposing columns, thereby preventing the collapse of the building. 8. The hoisting and holding mechanism includes a drum for fixing a distal end portion of a breath member formed of a band-shaped cord, a spring for constantly urging the drum in a winding direction, and a winding member for the breath member. The collapse prevention device for a building according to claim 7, further comprising: a brake having a release function that can prevent rewinding and release the prevented rewinding. 9. The vibration sensing member includes an engaging member rotatably attached to an upper end of a column, a hook at a distal end of the engaging member and a distal end engaged with each other, and a base end of the vibration sensing member is connected to the supporting member. A breath tension member provided rotatably with respect to the support, and a weight member provided at the rear end of the engagement member,
Under normal conditions, the tip of the engaging member engages with the breath tension member, and only when the building shakes or vibrates more than a predetermined amount, the weight member descends downward and the engagement between the engagement member and the breath tension member is reduced. The collapse prevention device for a building according to claim 7 or 8, wherein the engagement is released and the breath member is loosened by the downward rotation of the breath tension member. 10. The vibration sensing member is constituted by a radio with a light, or by attaching a radio with a light to the vibration sensing member, and detecting the generated vibration of a predetermined or more level to produce a radio with a light. The collapse prevention device for a building according to any one of claims 7 to 9, wherein lighting and broadcasting are performed.