JPH09215543A - Device for preventing contents of furniture from dropping by utilizing earthquake force - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable automatic actuation by utilizing weak earthquake force at the initial stage of earthquake to prevent damage, a personal accident, closing an evacuation passage caused by dropping contents in furniture from a shelf due to earthquake. SOLUTION: A guard member 1 is provided under a free content loading and unloading to furniture having accommodating shelves. Provided in a device for freely moving the guard member 1 on an inplane located at right angles to the furniture by earthquake force and dead weight. In addition, provided is a positioning member 2 for the moved guard member 1. Further provided at the position of the moved guard member 1 is functions for retaining a state in which the guard member 1 prevents the drop of the contents against external force acting on the guard member 1 or a locking device part M.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is operated by seismic force in order to prevent the contents of furniture from falling from shelves and being damaged due to an earthquake, causing a human disaster, or blocking an escape passage. The present invention relates to a fall-prevention device for contained articles of furniture.

[0002]

2. Description of the Related Art In a product shelf such as a store, a height of about 2 to 4 cm is taken into consideration in order to stabilize the contents and prevent the product from slipping off even if it is touched by a person. Barriers are often provided on the front of shelves. However, it is impossible to prevent goods with a high center of gravity from falling from the shelves in the event of a strong earthquake due to the level of barriers, and the actual situation is that considerable damage has occurred. In addition, shelves for carrying large heavy items,
Higher shelves often do not have barriers in front of the shelves to facilitate loading and unloading of items.

[0003]

As described above, in the case of a shelf without a barrier or a shelf having a barrier of about 2 to 4 cm, the contents may drop from the shelf and be damaged or a human disaster may occur during a strong earthquake. In order to prevent this accident, a guard member may be provided in advance, but in order to obtain a sufficient effect, it is necessary to make the height higher than the above-mentioned 2 to 4 cm, which makes it difficult to take in and out the contained items. Therefore, the problem to be solved by the present invention is to provide a shelf without a fixed barrier and to have a function of preventing falling of a contained object only in case of an earthquake, which can be easily attached to existing furniture. In addition, it is the development of a fall-prevention device for furniture items that can withstand a strong earthquake of the seismic intensity floor V level.

[0004]

In order to solve the above-mentioned problems, according to the present invention, the guard member 1 is provided on the furniture in a state where it does not hinder the accommodation and taking out of the contained items, and the guard member 1 is provided at the initial stage of the earthquake. When a seismic force of about seismic intensity III, IV is applied, the guard member 1 is moved by the seismic force and its own weight to a position where it is possible to prevent falling of the contents of the shelf in a plane perpendicular to the side surface of the furniture. In this state, when the contained item is pushed forward of the shelf by the seismic force acting on the contained item and the thrust acts on the guard member 1, the guard member 1 can prevent the contained item from falling against the thrust. It has a structure characterized by holding the state.

[0005]

Next, the operation of the present invention will be described. The furniture provided with the container dropping device of the present invention is furniture having no sliding doors or doors in the container shelf, and is a general term for furniture such as bookcases, product shelves, cupboards, and accessory shelves. . By the way, the contained article dropping device according to the present invention is mounted on furniture having a structure that does not fall down by an earthquake of seismic intensity floors III and IV, or on shelves fixed to a wall or the like. By the way, in a normal earthquake motion, the acceleration at the initial stage of the earthquake is small and gradually increases, and it takes about 3 to 4 seconds until the maximum acceleration is generated. Therefore, according to the present invention, the seismic intensity level I at the early stage of the earthquake, in which the contents are not dropped from the shelves,
Due to the seismic force acting in the front-rear direction on households of about II and IV and the self-weight of the guard member 1, the device according to the present invention is operated until the maximum acceleration occurs, and the contents of the guard member 1 fall from the shelf. Move to a position where it can be prevented. Then, when a thrust acts on the guard member 1 at this position, it has a function of holding the guard member 1 against this thrust, so that the contained items fall from the shelf when the seismic force of the seismic intensity level V is about. Acts to prevent. It should be noted that in the device according to the present invention, the position of the guard member 1 at which the device is installed is adjusted so that the device does not operate due to slight vibration or the like, and acts effectively depending on the state of the contents.
Alternatively, it often has a function of adjusting the holding force of the guard member 1.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment This embodiment will be described with reference to FIGS. FIG. 1 is a perspective view showing a case in which the contained article fall prevention device according to the present invention is installed using the left and right side surfaces of furniture K, FIGS. 2 to 3 are diagrams for explaining the operation, and FIG. 4 is a plan view of a main part. (One side), FIG. 5 is a perspective view when the present apparatus is equipped with the upper surface of the shelf T of the furniture K. The structure of this embodiment will be described. As shown in FIG. 1, brackets 3a and 3b are attached to the left and right side surfaces of furniture K by attaching screws 4. The guard member 1 is mounted and fixed to the head of a lever 6 which is rotatably mounted on a pin 5 fixed to the brackets 3a and 3b. Since the lever 6 is supported by the positioning member 7 in a state of being slightly tilted rearward as shown in FIG. 2, the guard member 1 continues to maintain the preset state unless earthquake motion occurs. By the way, when a certain amount of seismic force acts on the guard member 1 due to an earthquake, the guard member 1 rotates about the pin 5 as an axis, and it is possible to prevent the contents S on the shelf T from falling from the shelf T due to a strong earthquake. When it falls to the position (shown by the chain line), the tail portion m of the lever 6 engages with the hook 8 that constitutes the locking device portion M, and the rotation of the lever 6 is suppressed to prevent the contained item S from dropping. The hook 8 is swingably fitted into a pin 9 fixed to the brackets 3a and 3b. By the way, although the lower positioning member 2 is shown as fixed, a variable structure may be considered so that the falling position of the guard member 1 can be adjusted. Next, the operation of this embodiment will be described. Center of gravity G of the guard member 1 shown in FIG.
And the inclination angle of the rotation center O of the lever 6 (the same as the inclination angle of the lever 6 in the case of this figure) ψ is III (weak seismic intensity) or seismic intensity level in the seismic scale at the early stage of the earthquake at which the contents S do not fall from the shelf T I
The guard member 1 is set so as to fall forward in the event of a V (medium earthquake) earthquake motion. When the seismic acceleration is αs, when the seismic acceleration αs of αs> g · tan ψ (g is gravitational acceleration of 980 gal) acts, the guard member 1 falls forward. For example, if ψ is 1 degree, the guard member 1 will fall forward due to the seismic acceleration of αs> 17 gal (weak earthquake) and 2 degree αs> 35 gal (medium earthquake). In the state where the guard member 1 makes a rotational movement to the front side and is tilted forward from the vertical state, even if the seismic force disappears, the guard member 1 continues to fall to the position set by the lower positioning member 2 due to its own weight. . The value of the angle ψ is set by adjusting the upper positioning member 7. A locking device for the support member 1 will be described with reference to FIGS. FIG. 2 shows a state before an earthquake occurs, and FIG. 3 shows a state in which the guard member 1 has fallen to a set position due to an earthquake motion.
By the way, in the process of the guard member 1 falling, the lever 6 passes underneath while lifting the tip end n of the hook 8 with its tail portion m as shown by a chain line, and falls down until it contacts the lower positioning member 2. At this point, the hook 8 has returned to the initial state by its own weight as shown in FIG. In this state, the clearance μ between the tail portion m of the lever 6 and the tip end portion n of the hook 8 is preferably the minimum dimension that allows the hook 8 to return from the state of the chain line in FIG. 2 to the state of FIG. The contents S in the state of FIG.
When a seismic force of a seismic intensity of about V acts on the container S, the contents S are pushed out against the frictional force with the shelf T, and when the thrust Q acts on the guard member 1, the m part of the lever 6 and the n part of the hook 8 are Engage.
By the way, since the line of action of the thrust P acting on the engaging portion is lower than the pin 9 of the hook 8 by e, the hook 8 tries to rotate in the arrow direction, but the rotation is suppressed by the barrier q provided on the bracket 3a. That is, by locking the lever 6, even if the thrust Q acts on the guard member 1, the guard member 1 keeps the state of FIG. is there. FIG. 4 illustrates a case in which a cover 10 (shown by a chain line) is provided in a main part of the device so that the function of the device according to the present invention is not hindered by the contents S. This figure also shows the guard member 1.
As an example of attaching and fixing the lever 6 to the lever 6, a structure is shown in which the guard member 1 is fitted into a hole in the head of the lever 6 and fixed with a set screw 11. With this structure, the device of the present invention can be used for furniture. It is easy to install. By the way, the device of the above-mentioned embodiment has an advantage that it can be easily attached to existing furniture by incorporating the main part of the device into the brackets 3a and 3b. However, in the process of manufacturing furniture, the main part of the device is directly attached to the side plate B of the furniture without using the above bracket.
If it is provided, the structure is simplified and it is advantageous in cost. There are usually no side plates on store shelves or household hanging shelves. When such furniture is provided with a device having the function of the present embodiment, the bracket 3 as shown in FIG.
The main parts of the attachment device may be set by directly mounting a and 3b on the upper surface of the shelf T. Second Embodiment This embodiment will be described with reference to FIGS. The main difference of this embodiment from the first embodiment is a method of holding the guard member 1 against a thrust Q acting on the guard member 1 at a predetermined position where the guard member 1 has dropped. FIG. 6 is a side view of one side of this device, showing a state before an earthquake occurs. A guard member 1 is fitted and fixed to the head of the lever 6, and an elongated hole f that engages with the pin 5 provided on the side plate B is provided in the tail. The lever 6 is provided with a positioning support pin 12, and the support pin 12 engages with the u surface of the upper positioning member 7 to set the state of the lever 6. The mounting state of the upper positioning member 7 can be adjusted to some extent by rotating the pin 13 provided on the side plate B to the left and right. By the way, when a certain amount of seismic force F acts on the guard member 1 due to an earthquake, the support pin 12 moves forward while sliding on the u surface of the upper positioning member 7 and disengages from the upper positioning member 7. The guard member 1 falls down to the position set by the lower positioning member 2 due to its own weight, but at this position, the lever 6 is in a substantially horizontal state (illustrated by a chain line).
It has become. After the guard member 1 has fallen to a predetermined position, the seismic force of the seismic intensity level V acts on the stored item S, the stored item S is pushed out against the frictional force with the shelf T, and the guard member 1
The function of holding the state of the guard member 1 against the thrust Q when the thrust Q acts on the will be described with reference to FIG. 7. When the thrust Q acts on the guard member 1, the lever 6 is pushed forward, and when the rear end of the long hole f moves until it contacts the pin 5, the lever 6 cannot move forward. By holding the guard member 1 in this state, the contained items S are prevented from falling from the shelf T. FIG. 8 is a plan view of an essential part on one side. By the way, the magnitude of the seismic force F that causes the guard member 1 to fall is determined by the engagement relationship between the support pin 12 and the positioning member 7. This relationship will be described with reference to the enlarged view of FIG. U of the positioning member 7
Assuming that the angle between the surface and the horizontal plane is θ, even if this θ is increased to some extent when there is no earthquake motion, the lever 6 causes the frictional resistance R between the support pin 12 and the u surface of the positioning member 7 to prevent the guard member 1 from moving. It maintains a stationary state against the thrust applied by its own weight. When a certain amount of seismic force acts on the guard member 1 with θ set as described above, the support pin 12 moves forward against the frictional resistance R and moves toward the guard member 1.
Falls to a predetermined position. That is, since the seismic force that causes the guard member 1 to fall is determined by the angle θ, in the case of the contained object fall prevention device according to the present embodiment, the seismic force is set so that the device operates when the seismic force F of the seismic intensity levels III and IV is about. It suffices to set θ. Third Embodiment In the device shown in this embodiment, the gap between the contents and the upper shelf T or the ceiling plate C is reduced, such as a bookcase or a document shelf, and the device according to the above embodiment can be provided. It is most suitable as a fall prevention device for stored items of furniture. Figures 10-1
This embodiment will be described with reference to FIG. FIG. 10 is a perspective view of furniture equipped with the device of this embodiment, in which frames 14a and 14b are provided at the front portions of both side plates B of furniture K. A guard member 1 supported by a support member 15 in the groove portion of the frame body.
Is provided on the front panel of the ceiling plate C of the furniture K and each shelf T, and when the earthquake motion of the seismic intensity floor V acts on the furniture, the guard member 1 is guided by the groove of the frame body and positioned. 2 to prevent the contained items from falling from the shelves to the position set by 2 (shown by a chain line). By the way, in the case of the device of the present embodiment, there is no locking device at the falling position of the guard member 1 as provided in the devices of the first and second embodiments, and the frame bodies 14a and 14b have that function. Has the advantage of being simple. FIG. 11 shows FIG.
FIG. 6 is a cross-sectional view taken along line AA of FIG. The main structure and operation of the device will be described with reference to this drawing. The frame body 14a is attached to the side plate B of the furniture K by wood screws 16, and the support member 15 mounted on the frame body 14a engages with the hole j provided in the guard member 1 to provide the guard as shown. It holds the member 1. Engagement length δ between the support member 15 and the guard member 1
Is set so that the guard member 1 does not drop due to slight vibration during normal use of furniture, but falls due to seismic motion of seismic intensity levels III and IV at the beginning of the earthquake. In the structure shown in FIG. 11, δ is set by replacing the support member 15, but in the structure shown in FIG. 14, the support member 15 press-fitted to the guard member 1 is engaged with the hole k provided in the frame body 14a. The mating guard member 1 is held, and the support member 15 is taken in and out to set the engagement length δ. FIG.
The guard member 1 is supported by the small protrusion v provided on the frame body 14a, and the attraction force of the magnet 17 provided on the guard member 1 holds the guard member 1 against microvibration, so that the attraction force of the magnet 17 is retained. By the adjustment, the structure in which the guard member 1 falls when the earthquake motion of the seismic intensity levels III and IV acts is illustrated. By the way, in this embodiment, as shown in FIG.
When the guard member 1 is moved horizontally by the seismic force F and disengaged from the support member 15, the positioning member 2 is moved by its own weight.
It has a structure in which it is dropped to a position (illustrated by a chain line) set by and the drop of the contained article S is prevented by the drag force of the left and right frame bodies. 12 is a sectional view taken along the line EE of FIG. 11, and FIG.
3 is a cross-sectional view taken along the line JJ of FIG. 11, and a plurality of holes 2a are provided for adjusting the position of the guard member 1 provided on the frame. When furniture with a long front width is equipped with the container dropping device according to the present invention, the guard member also becomes long and the thrust Q acting on the guard member due to the seismic force acting on the container.
In some cases, it may be difficult to support the guard with only the left and right ends of the guard member. In this case, one set of the intermediate guard member holding device U as shown in FIG. 16 may be provided in the middle of the shelf. 16 and 17, the structure and operation of the embodiment of the guard member holding device U will be described. FIG. 16 is a cross-sectional side view of a main part, in which a bracket 18 is attached to the upper surface of a shelf T with wood screws 19 or the like, and a hook 20 for holding the guard member 1 in the middle is a pin 2 provided on the bracket 18.
1 is rotatably mounted. Since the hook 20 is supported by the positioning adjusting screw 22 in a state in which the hook 20 is tilted slightly rearward as shown in the drawing, the hook 20 continues to hold the set state unless earthquake motion occurs. The seismic force that causes the hook 20 to fall forward is determined by the inclination angle β of the hook 20.
By the way, in order for the hook 20 to fall to the position shown by the chain line and engage with the guard member 1, it is necessary that the hook 20 fall at a timing slightly behind the guard member 1. For this purpose, the angle β may be set by the adjusting screw 22 so that the hook 20 falls forward by an earthquake force slightly larger than the earthquake force that causes the guard member 1 to fall. FIG.
FIG. 4 is a plan view of the guard member holding device U in a state where the hook 20 drops and is engaged with the guard member 1. The intermediate guard member holding device described in detail above is of course the first, second, and third embodiments.
However, in the case of the second and third embodiments, a fixed hook for holding the guard member 1 in the middle can be provided so as to project to the front of the shelf, which is advantageous in terms of cost. However, the fact that the hook always projects to the front of the furniture is not preferable in terms of appearance and safety.

[0007]

[Effects of the Invention] When an unexpected large earthquake strikes, the product on the product shelf falls from the shelf and is damaged, causing a human disaster, blocking the evacuation passage, and the book falls from the bookcase onto the floor. The damage caused by the falling of the contained items from the shelves due to the earthquake is enormous, as they are scattered and require considerable effort to clean up afterwards.
By the way, as described in detail above, according to the present invention, in order to prevent physical damage or personal damage caused by the falling of the contained item from the shelf, the furniture contained item fall prevention which automatically operates by utilizing seismic force is prevented. It is related to the device, its structure is simple, its operation is highly reliable, there is little space for installation, and
It is a very useful invention that can be easily attached to existing furniture.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a first embodiment of the present invention.

FIG. 2 is a side view for explaining the operation of the first embodiment of the present invention.

FIG. 3 is a side view for explaining the operation of the first embodiment of the present invention.

4 is a plan view taken along arrow AA of FIG.

FIG. 5 is a perspective view when the device of the first embodiment of the present invention is attached to a shelf surface.

FIG. 6 is a partial cross-sectional side view of the second embodiment of the present invention before the earthquake.

FIG. 7 is a partial cross-sectional side view of the second embodiment of the present invention after an earthquake.

FIG. 8 is a plan view of one side of essential parts of a second embodiment of the present invention.

FIG. 9 is an enlarged side view for explaining a positioning member of the second embodiment of the present invention.

FIG. 10 is an overall perspective view of a third embodiment of the present invention.

11 is a side view taken along the line AA of FIG.

12 is a plan view taken along the line EE in FIG. 11 showing a support structure for a guard member.

13 is a sectional view taken along the line JJ of FIG.

FIG. 14 is a sectional side view showing another guard member support structure of the third embodiment of the present invention.

FIG. 15 is a sectional side view showing another guard member support structure of the third embodiment of the present invention.

FIG. 16 is a side view of a partial cross section of the intermediate guard member holding device portion of the present invention.

FIG. 17 is a plan view of the intermediate guard member holding device portion of the present invention.

[Explanation of symbols]

 1 is a guard member 2, 7 is a positioning member 3a, 3b, 18 is a bracket 4 is a mounting screw 4, 16 and 19 is a mounting screw 5, 9, 12, 13, 13 and 21 is a pin 6 is a lever 8 is a hook 10 is a cover 11 is a set screw 14a , 14b is a frame body 15 is a support member 17 is a magnet 22 is an adjusting screw B is a furniture side plate C is a furniture ceiling plate F, P, Q and R are acting forces G is a center of gravity of the guard member 1 K is furniture M is a locking device part S is a contained item T is a shelf U is an intermediate guard member holding device e, δ, μ are lengths f, j, k are holes β, θ, ψ are angles m, n, q, u, v Is a part of the component

Claims (1)

[Claims] 1. A guard member 1 is provided on furniture having a storage shelf in a state where it does not hinder the accommodation or removal of an item, and the guard member 1 is perpendicular to the side surface of the furniture due to seismic force and its own weight. And a positioning member 2 for holding the guard member 1 after the movement in a plane, and for holding the guard member 1 after the movement at a position capable of preventing the contents on the shelf from dropping from the shelf due to an earthquake,
Further, when the guard member 1 is pushed to the front of the shelf and a thrust acts on the guard member 1 due to the seismic force acting on the contents at the position after the guard member 1 is moved, the guard member is resisted against the thrust. 1. A device for preventing falling of a stored item of furniture utilizing seismic force, wherein the device 1 has a function of holding a state capable of preventing a contained item from falling or a locking device section M for this purpose.