Furniture fall prevention device

Abstract

To provide a furniture fall prevention tool that automatically keeps tension to the ceiling, since, if an installation place of a piece of furniture is on a tatami or s cushion floor, the part of the floor receiving the load of the piece of furniture is concaved to make the furniture subsided over time, so that the subsidence may cause a conventional furniture fall prevention tool to lose the function of fall prevention because of loosening of the tension to the ceiling, with a space produced, and since the correction of the tension takes time and labor, it is often unattended although reinforcement of the function of the fall prevention tool is regularly required, which may result in failure of the fall prevention function in the occurrence of generation of an earthquake.SOLUTION: The tool is composed of an upper box 2, a lower box 3, and an upper box elevation function. By using a gravity force, a pulley 45 or leverage is made to convert the descending force of a weight 41 to an elevation force of the upper box to always maintain the pressurization of the upper box toward the ceiling 15, which solves the problem of losing the fall prevention function.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a device for preventing furniture from falling over, which is intended to prevent danger during earthquakes. [Background technology]

[0002] Among conventional furniture tip-prevention devices, there are those that are placed on the top board of furniture and have a push plate that is raised and pressed against the ceiling (see, for example, Patent Documents 1 and 2).

[0003] In Patent Document 1, a string is looped around pulleys on the lower and upper boxes, and the upper box is raised by manually pulling it, and the upper box is pressed against the ceiling to prevent the furniture from falling over. In Patent Document 2, a spring is used to automatically press a pressure plate against the ceiling at all times, and friction is used to prevent furniture from falling over. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6547210 [Patent Document 2] JP 2006-158809 A Summary of the Invention Problem that the invention is trying to solve

[0005] In Patent Document 1, the pressure on the ceiling is adjusted by the strength of the hand used to roll it up, so excessive torque can damage the ceiling, or too little torque can be applied to prevent damage, resulting in insufficient pressure on the ceiling and impairing the anti-tip function. Furthermore, even if the pressure on the ceiling is sufficient when first installed, the weight of the furniture and the pressure of the furniture anti-tip device on the floor and ceiling over time can cause the floor surface to dent, especially in tatami mats and cushion flooring, and the furniture can sink, causing the pressure on the ceiling to loosen and gaps to form. In this case, there is a risk that the furniture anti-tip device will shift on the top of the furniture during an earthquake and lose its anti-tip function. Therefore, it is necessary to periodically check the pressure and tighten the device, but if an earthquake occurs during that time, the furniture may tip over. The inventor and applicant of Patent Document 1 are the same as the inventor and applicant of the present application.

[0006] The spring in Patent Document 2 that is compressed for a long period of time loses its restoring force and the frictional force with the ceiling also decreases.

[0007] The present invention aims to provide a furniture tip-over prevention device that applies constant pressure to the ceiling, does not require retightening, and automatically applies pressure at all times, creating static friction, ensuring a perfect tip-over prevention function at all times, and is prepared for earthquakes, and is easy to install.

[0008] The first aspect of the present invention is as follows: A box body that is installed between furniture 17 and a ceiling 15 to prevent the furniture 17 from falling over during an earthquake. a lower box 3 having at least a bottom plate 33 and two side plates 31; an upper box 2 having at least a top plate 22 and both side plates 21; The side plates 21 of the upper box 2 are fitted to the side plates 31 of the lower box 3 so as to be movable up and down. A pulley 45 provided near the upper end of at least one of the side plates 31 of the lower box 3; The string 42 that is looped around the pulley 45 and, a string locking portion 43 for locking one end of the string 42 in the vicinity of the lower end of the both side plates 21 of the upper box 2 on the side that fits with the side plate 31 of the lower box 3 to which the pulley 45 is attached; A weight 41 attached to one end of the string 42 for pulling; It consists of:

[0009] The second configuration of the present invention is A box body that is installed between furniture 17 and a ceiling 15 to prevent the furniture 17 from falling over during an earthquake. a lower box 3 having at least a bottom plate 33 and two side plates 31; an upper box 2 having at least a top plate 22 and both side plates 21; The side plates 21 of the upper box 2 are fitted to the side plates 31 of the lower box 3 so as to be movable up and down. A movable pulley 46 is attached to the vicinity of a lower end of at least one of the side plates 21 of the upper box 2; a fixed pulley 45 provided near the upper end of the side plate 31 of the lower box 3 on the side that fits with the side plate 21 of the upper box 2 to which the movable pulley 46 is attached; A string 42 is wound around the fixed pulley 45 and the movable pulley 46, A cord locking portion 43 that locks one end of the cord 42 to the vicinity of the upper end of the side plate 31 of the lower box 3 on which the fixed pulley 45 is provided; A weight 41 attached to one end of the string 42; It consists of:

[0010] The third aspect of the present invention is A lower box 3 is a box body that is installed between a piece of furniture 17 and a ceiling 15 to prevent the piece of furniture 17 from falling over during an earthquake, and has at least a bottom plate 33 and both side plates 31; an upper box 2 having at least a top plate 22 and both side plates 21; The side plates 21 of the upper box 2 are fitted to the outer sides of the side plates 31 of the lower box 3 so as to be movable up and down, and a lever body 51 is provided with a fulcrum 52 on the inner side of at least one of the side plates 31 of the lower box 3; A push rod 55 connected to the action point 54; A push receiving portion 56 is attached to the inside of the upper plate 22 of the upper box 2 and receives the push rod 55; A force point 53 at an end opposite to the action point 54; A weight 41 attached to the force point 53, It consists of:

[0011] The fourth aspect of the present invention is A middle plate 71 having substantially the same dimensions as the side plates 31 of the lower box 3; A plurality of mid-plate coupling holes 38 are provided in at least one row in the vertical direction in the mid-plate 71; A middle plate connecting hole 38 is provided in each of the side plates 31 of the lower box 3 at the same position as the middle plate connecting hole 38 of the middle plate 71; a connecting means 75 for integrating the side plates 31 and the middle plate 71 of the lower box 3; and in addition to any one of the configurations described in the preceding paragraphs 1 to 3.

[0012] The fifth aspect of the present invention is A lift stop pin hole 63 is provided at least at one position near the lower end of each of the side plates 21 of the upper box 2; A plurality of downward stop pin holes 62 are provided vertically at positions on both side plates 31 of the lower box 3 that correspond to the upward stop pin holes 63; A descent stop / ascending stop pin 61 that passes through the ascending stop pin hole 63 of the upper box 2 and the descending stop pin hole 62 of the lower box 3; This is in addition to any one of the configurations described in items 1 to 4 above.

[0013] The sixth aspect of the present invention is A string length adjustment portion 44 is provided on the string locking portion 43 in order to adjust the height of the weight 41; This is added to the configuration described in any one of items 1 and 2 above. Effect of the Invention

[0014] According to claims 1, 2 and 3, 1. By using gravity, a constant pressure is maintained at all times, eliminating the need for retightening. 2. As soon as an earthquake occurs, the static friction immediately takes effect through constant pressure, suppressing the shaking of furniture. 3. When the weight swings during an earthquake, the accelerating weight activates the pumping brake, suppressing the swinging of the furniture. 4. The furniture is prevented from falling over in two stages: by friction and by pressing the furniture and its body diagonally against the ceiling, allowing time for evacuation. 5. The pressure can be adjusted (by adjusting the weight of the weight). According to claims 2 and 3, the pressing force can be increased by using a movable pulley or a lever. Claim 4 allows the middle board to expand the range of application to the dimensions between the furniture top and the ceiling. Claim 5 allows for easy and safe installation. The upper box's rise stop function allows the unit to be stopped at a position where it does not come into contact with the ceiling, making it easy to push onto the furniture top. Releasing the stop function automatically raises the unit, completing installation, and eliminating the need for a step stool, making it safe. The function to stop the descent of the upper box stops the descent of the upper box caused by the pressure narrowing the gap between the diagonal of the furniture and the ceiling during an earthquake, and together with the pressure of the weight, suppresses the shaking of the furniture. Even if the earthquake becomes stronger, the unit is integrated with the furniture, so the furniture remains stable and prevents shaking. The unit functions without moving on the furniture top during an earthquake, preventing the situation shown in Figure 2. As a side effect, it can be used as a storage device to store lightweight disaster prevention supplies such as preserved food. The weights can be made into coins, making it possible to prepare for situations where cashless payments are not possible due to a power outage. [Brief description of the drawings]

[0015] [Figure 1]Side view comparing the installation work of furniture tip-over prevention devices with the conventional method and the present invention. [Diagram 2] A side view showing the problems with conventional furniture tip-over prevention devices [Diagram 3] A front view showing the basic structure of the present application. [Figure 4] (a) Perspective view of the system using gravity and pulleys (b) Perspective view of the system from the side [Diagram 5] A perspective view of the perspective view of FIG. [Figure 6] Front view with movable pulley [Figure 7] Side view with movable pulley [Figure 8] Plan view using movable pulley [Figure 9] Front view with lever [Figure 10] Perspective of a perspective view using a lever DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Claim 1 will be explained with reference to Figures 3, 4 and 5. A lower box 3 is made up of a bottom plate 33 and both side plates 31, and an upper box 2 is made up of an upper plate 22 and both side plates 21. Both side plates 21 are fitted to both side plates 31 so as to be movable up and down. A string 42 is attached to a locking portion 43 provided near the lower end of at least one of the upper box side plates 21, and the string 42 is threaded around a pulley or sliding member portion 45 provided at the upper end of the lower box side plate 31 opposite the locking portion 43, and a weight 41 is attached to the end of the string 42. The upper box side plates 21 are fitted to the lower box side plates 31 in either state as shown in Fig. 3(a) or (b), and either state functions, the difference being the change in design. Claim 1 is a structure in which the upper box 2 rises the same distance as the weight 41 descends.

[0017] As a common feature of claims 1 to 3, the pressing force of the upper box 2 against the ceiling 15 is stronger as the weight x multiplication force of the weight 41 increases, relative to the weight of the upper box 2 and friction of the pulleys, etc., and therefore the upper box 2 needs to be lightweight and sturdy. Also, in order to increase the lifting force of the upper box 2 and lift it smoothly, each device for lifting the upper box 2 may also be provided on both side panels 31 and the back panel 32 of the lower box 3.

[0018] Claim 2 will be explained with reference to Figs. 6, 7 and 8. Fig. 6 is a front view, and the left side is omitted since it is symmetrical with the right. Fig. 7 is a perspective view of the side view. Fig. 8 is a plan view, showing the upper plate 22 of the upper box 2 in perspective. Also, the left side is omitted since it is symmetrical with the right. A movable pulley 46 is provided near the lower end on the inside of both side panels 21 of the upper box, a fixed pulley 45 is provided at the upper end of both side panels 31 of the opposing lower box, and a locking portion 43 is provided near the upper end of both side panels 31 of the lower box on which the fixed pulley 45 is provided. A string 42 has one end attached to the locking portion 43, and a weight 41 is attached to the end of the string 42 facing the locking portion 43. The string 42 is then threaded around the movable pulley 46 and the fixed pulley 45. With the above configuration, the upper box 2 is raised by utilizing the boosting force of the movable pulley 46.

[0019] Claim 3 will be explained with reference to Figs. 9 and 10. Fig. 9 is a front view, and the left side view is omitted because it is symmetrical. It is composed of a lever body 51 with a fulcrum 52 provided on the inside of at least one of the side plates 31 of the lower box, a push rod 55 rotatably attached to a connecting part 54 provided on the application point side of the lever body 51, a receiving part 56 attached near the upper end of the inside of the upper plate 22 of the upper box 2 that receives one end of the push rod, and a weight 41 attached to the application point side end of the lever body 51. With the above configuration, it is a structure that uses the leverage of the lever to lift the upper box 2. Fig. 10 is a perspective view of the main body, and the illustration of the lever structure attached to the left side and rear side is omitted. Note that Figs. 9 and 10 also show the middle plate of claim 4.

[0020] Claim 4 will be explained with reference to Figs. 9 and 10. It comprises a middle plate 71 having approximately the same dimensions as both side plates 31 of the lower box 3, a plurality of side plate connecting holes 73 provided in at least one row in the vertical direction in the middle plate 71, middle plate connecting holes 38 provided in the side plates 31 of the lower box 3 at positions coinciding with the side plate connecting holes 73 in the middle plate 71, and connecting means 77. To use the furniture, the positions of the lower box 3 and the upper box 2 are determined so that they are slightly shorter than the distance between the top board 171 of the furniture 17 and the ceiling 15, and the middle board connecting holes 38 on both side boards 31 of the lower box 3 and the lower box side board connecting holes 73 on the middle board 71 are determined accordingly, and the boxes are connected by connecting means 77 such as pins, wood screws, screws, bolts, etc. The middle plate 71 must be connected to both side plates 33 of the lower box 3, but a middle plate 71 may also be provided on the rear plate 35 of the lower box 3. In that case, it can be made integral with both side plates 33 into a U-shape to increase strength. When the middle plate 71 is attached to the outside of both side plates 31 of the lower box 3, a protrusion 76 can be provided at the upper end of the middle plate 71, and the upper box lifting function provided in the side plates 31 of the lower box 3 can be transferred to the protrusion 76 of the middle plate 71. A cutout portion 37 can be provided in the side plates 31 of the lower box 3 at the same position as the protrusion 71, with the protrusion 76 fitting into it so that the protrusion 76 can slide up and down, and the protrusion 76 can be fitted into the cutout portion 37.

[0021] An example of use according to claim 4 will now be described. If the middle board 71 is not used, for example, if the combined vertical dimension of the lower box 3 and upper box 2 is 30 cm and the rise of the upper box 2 is 20 cm, then when pressed against the ceiling 15, a rise room of 10 cm or more is appropriate, and the applicable range is 30 cm to 40 cm. On the other hand, if the middle plate 71 of the present application is used, when the lower box 3 is 30 cm and the middle plate 71 is 30 cm, with 10 cm as the joint 78 with the lower box 3, the middle plate 71 protrudes 20 cm from the upper end of the lower box 3, for a total of 50 cm, and adding the 10 cm rise of the upper box 3, the applicable width becomes 50 to 60 cm. As described above, when the middle board 71 is joined to the lower box 3 with a vertical dimension of 30 cm, the distance between the top board 171 of the furniture 17 and the ceiling 15 can be adjusted to 30 cm to 60 cm.

[0022] Claim 5 will be described with reference to Figs. 1(b), (c) and 5 to 10. An upper box ascent stop hole 63 is provided as a through hole in at least one location near the lower end near the front end of both side plates 21 of upper box 2. A plurality of upper box ascent stop holes / descent stop holes 62 as through holes are provided in the vertical direction at positions coinciding with the upper box ascent stop hole 63 near the front end of both lower box side plates 31 and middle plate 71. The upper box ascent stop and descent stop pin 61 is configured with a knob on a rod having a thickness that can be passed through the upper box ascent stop hole 63 and the upper box descent stop hole 62 and a dimension slightly longer than the combined thickness of the upper box side plate 21 and the lower box side plate 31. To use it, when placing main body 1 on top plate 171 of furniture 17, the vertical dimension of the main body is made slightly shorter than the dimension from top plate 171 of furniture 17 to the ceiling so that main body 1 does not come into contact with ceiling 15, and the position for stopping the rise of upper box 2 is determined. Then, by inserting upper box stop / upper box descent stop pin 61 into upper box rise stop hole 63 provided in the upper box and upper box rise stop / upper box descent stop hole 62 provided in the lower box or middle plate, the rise of upper box 2 is stopped and it can be smoothly pushed down as shown in Figure 1(b). 1(c), the weight 41 is lowered by removing the upper box ascent stop and descent stop pin 61, and the upper box 2 is automatically raised and pressed against the ceiling 15. Next, by inserting an upper box ascent / descent stop pin 61 into the uppermost descent stop hole 62 in both side panels 31 of the lower box 3 exposed below the lower edge of both side panels 21 of the upper box 2, the upper box 2 can only rise but is stopped from falling, and the upper box 2 does not fall during an earthquake, maintaining its pressure against the ceiling 15 and preventing the furniture 17 from falling over.

[0023] Claim 6 will be explained with reference to Figs. 2, 5, 8 and 10. The bottom plate 33 of the lower box 3 is connected to the top plate 171 of the furniture 17 by wood screws or the like through furniture connecting holes 36, which are a plurality of through holes provided in the bottom plate 33 of the lower box 3. As shown by arrow F in FIG. 2(b), during an earthquake, shaking that exceeds the frictional force with the top plate 171 of the furniture 17, or due to insufficient pressure causing a decrease in friction, may cause the main body 1 to move back and forth on the top plate 171 of the furniture 17, causing the main body 1 to lose its anti-tip function; this is prevented by being integrated with the furniture. In the case of a steel cabinet, holes may be drilled in the top plate of the cabinet and bolts may be used to fasten them together. Although not shown in the figure, a non-slip agent may be applied to the outside of the bottom plate 33 of the lower box 3 and the outside of the top plate of the upper box 2, or a non-slip sheet may be attached to them. Furthermore, a non-slip agent may be applied to the top surface 171 of the furniture 17 or a part of the ceiling 15, or a non-slip sheet may be attached to increase friction.

[0024] Fig. 1(a) shows a conventional pole-type furniture tip-prevention device 12. Because it is installed at the innermost part of the top plate 171 of the furniture 17, a step stool 19 must be used when installing and tightening, which is dangerous. On the other hand, as shown in FIG. 1(b), the present invention does not require a step stool 19 and the main body 1 can be set up safely.

[0025] FIG. 2 is a side view showing the problems with the conventional furniture tip-prevention devices 11 and 12. Conventional furniture tip-prevention devices 11 and 12 may press sufficiently against the ceiling 15 when first installed, but over time the weight of the furniture 17 can easily cause the installation floor 16, particularly tatami mats and cushioned flooring, to dent, causing the furniture 17 to sink and resulting in a loss of pressure against the ceiling 15 or the development of gaps. For this reason, some product instruction manuals state that the bolts should be retightened several days after installation, and then periodically thereafter. However, this is often neglected due to the hassle of using a stepladder. If an earthquake were to occur under such conditions, the following is expected to occur: In the case of the pole-type furniture anti-tip device 12 of Figure 2(a), in the event of an earthquake, the furniture 17 will move forward in the direction of arrow C, widening the gap between it and the rear wall 14, and the furniture 17 will also swing backward in the direction of arrow D, causing the rear end of the top plate 171 of the furniture 17 to drop, and the pole 12 will also drop and its upper part will tip forward E, which may reduce the furniture anti-tip function. The box-shaped furniture anti-tip device 11 in Figure 2(b) slides forward on the ceiling 15 and the top plate 171 of the furniture 17. If it moves forward more than half the dimension of the top plate 171 in the front-to-back direction, the diagonal 18 will become shorter, which may reduce the functionality of the furniture anti-tip device 11. In FIG. 2(c), because the furniture 17 has little friction, it starts shaking from the early stage of the earthquake, gains momentum and tilts forward, and the rear upper end of the furniture anti-tip device 11 breaks the ceiling 15 and is pushed up into the ceiling 15, and the top plate 171 of the furniture 17 slides against the bottom of the furniture anti-tip device 11, causing the furniture 17 to fall over.

[0026] In order to solve the problem of FIG. 2, the present invention shown in FIG. 1(c) utilizes the permanent gravity, and as the floor 16 sinks, the upper box 2 automatically rises and is constantly pressed against the ceiling 15. As a result, in the event of an earthquake, the constant pressure and static friction over a wide area will activate the brakes from the early stages of the earthquake, preventing the furniture from falling over. The main body functions without moving because it is fixed to the top plate of the furniture through the furniture connecting holes 36 in the bottom plate 33 of the lower box 3.

[0027] In FIG. 4, a front panel 24 is provided on the upper box 2 to cover the lower box 3, and the outer periphery of the lower box 3 acts as a rail, allowing the upper box 2 to rise and fall stably.

[0028] 6 to 10, the upper box 2 and the lower box 3 are connected with a sliding rail 26, which increases the strength of the main body 1, allows the upper box 2 to rise and fall smoothly and stably, and also serves to absorb deformation pressure from the furniture 17 and ceiling 15 in the event of an earthquake.

[0029] As shown in Figs. 6 to 8, when main body 1 is used as a storage device, weight 41 and lever body 51 can be covered with cover 47 to prevent them from coming into contact with stored items and impairing their functionality, and the appearance can also be improved.

[0030] When the weight 41 lands on the bottom plate 33 of the lower box 3, the upper box 2 loses any further lifting force. Therefore, the locking portion 43 for fastening the string 42 is a through hole provided in the relevant portion, and the string 42 passing through it is a length adjustment portion 44 using a fastener. The usage and effect are as follows: With the upper box 2 pressed against the ceiling 15, the string 42 is pulled to pull up the weight 41, and the string 42 is fastened with the length adjustment part 44. This allows more room for the weight 41 to descend, and as a result, the upper box 2 has more room for the upward force to press against the ceiling 15 stably.

[0031] By providing an upper plate 32 to the lower box 3 shown in FIG. 4(b), the strength of the lower box 3 can be increased. A notch is provided at the portion where the pulley 45 etc. come into contact. Furthermore, when the upper box 2 is raised, the upper plate 32 of the lower box 3 serves as a shelf, which is convenient for storage. [Explanation of symbols]

[0032] 1 Main body 11 Conventional box-type furniture tip-over prevention device 12 Conventional pole-type furniture tip-over prevention device 13 Person 14 Wall 15 Ceiling 151 Gap between ceiling and top plate of upper box 16 Floor 17 Furniture 171 Furniture top plate 18 Diagonal 19 Step 2 Upper box 21 Both side plates 22 Upper plate 23 Rear plate 24 Front plate 25 Rear plate 26 Slide rail 3 Lower box 31 Both side plates 32 Upper plate 33 Bottom plate 34 Front plate 35 Rear plate 36 Furniture connection hole 37 Notch 38 Middle plate connection hole 41 Weight 42 Cord 43 Cord locking part 44 Cord length adjustment part 45 Fixed pulley 46 Movable pulley 47 Device cover 51 Lever 52 Fulcrum 53 Force point 54 Point of action 55 Push rod 56 Push receiving part 61 Descent stop and ascent stop pin 62 Lowering stop pin hole 63 Upper stop pin hole 71 Middle plate 72 Protrusion 73 Through hole

Claims

1. A box body that is installed between furniture 17 and a ceiling 15 to prevent the furniture 17 from falling over during an earthquake, a lower box 3 having at least a bottom plate 33 and both side plates 31; an upper box 2 having at least a top plate 22 and both side plates 21; The side plates 21 of the upper box 2 are fitted to the side plates 31 of the lower box 3 so as to be movable up and down. A pulley 45 provided near an upper end of at least one of the side plates 31 of the lower box 3; A string 42 is wound around the pulley 45, a string locking portion 43 for locking one end of the string 42 in the vicinity of the lower end of the side plate 21 of the upper box 2 on the side that fits with the side plate 31 of the lower box 3 to which the pulley 45 is attached; A weight 41 attached to one end of the string 42 for pulling; This is a device to prevent furniture from falling over.

2. A lower box 3 is a box body that is installed between a piece of furniture 17 and a ceiling 15 to prevent the piece of furniture 17 from falling over during an earthquake, and has at least a bottom plate 33 and both side plates 31; an upper box 2 having at least a top plate 22 and both side plates 21; The side plates 21 of the upper box 2 are fitted to the side plates 31 of the lower box 3 so as to be movable up and down. A movable pulley 46 is attached to the vicinity of a lower end of at least one of the side plates 21 of the upper box 2; a fixed pulley 45 provided near the upper end of the side plate 31 of the lower box 3 on the side that fits with the side plate 21 of the upper box 2 to which the movable pulley 46 is attached; A string 42 is wound around the fixed pulley 45 and the movable pulley 46, a string locking portion 43 that locks one end of the string 42 to the vicinity of the upper end of the side plate 31 of the lower box 3 on which the fixed pulley 45 is provided; A weight 41 attached to one end of the string 42; This is a device to prevent furniture from falling over.

3. A lower box 3 is a box body that is installed between a piece of furniture 17 and a ceiling 15 to prevent the piece of furniture 17 from falling over during an earthquake, and has at least a bottom plate 33 and both side plates 31; an upper box 2 having at least a top plate 22 and both side plates 21; The side plates 21 of the upper box 2 are fitted to the outer sides of the side plates 31 of the lower box 3 so as to be movable up and down, and a lever body 51 is provided with a fulcrum 52 on the inner side of at least one of the side plates 31 of the lower box 3; A point of action 54 at one end of the lever body 51; A push rod 55 connected to the action point 54; A push receiving portion 56 is attached to the inside of the upper plate 22 of the upper box 2 and receives the push rod 55; A force point 53 at an end opposite to the action point 54; A weight 41 attached to the force point 53; This is a device to prevent furniture from falling over.

4. A middle plate 71 having approximately the same dimensions as the side plates 31 of the lower box 3; A plurality of side panel connecting holes 73 are provided in at least one row in the vertical direction in the middle panel 71; A middle plate joining hole 38 is provided in each of the side plates 31 of the lower box 3 at the same position as the side plate joining hole 73 of the middle plate 71; a connecting means 77 for connecting the side plates 31 and the middle plate 71 of the lower box 3 together; 4. The furniture tip-over prevention device according to claim 1, further comprising a height adjustment structure for the upper box 2.

5. A lift stop pin hole 63 is provided at least at one position near the lower end of each of the side plates 21 of the upper box 2; A plurality of descent stop pin holes 62 are provided vertically at positions that correspond to the ascent stop pin holes 63 on both side plates 31 of the lower box 3; A descent stop / ascending stop pin 61 that passes through the ascending stop pin hole 63 of the upper box 2 and the descending stop pin hole 62 of the lower box 3; The furniture tip-over prevention device according to any one of claims 1 to 4,

6. A string length adjustment portion 44 provided on the string locking portion 43 for adjusting the height of the weight 41; The furniture tip-over prevention device according to any one of claims 1 to 2,

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