JPS6259564B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that effectively prevents furniture from falling forward due to vibrations such as earthquakes.

Generally, when an earthquake occurs, large box-shaped furniture without any anti-vibration measures vibrates back and forth as shown in Figure 3, and when the vibration becomes large, the drawers may extend forward or the doors may close. If the furniture opens forward, the center of gravity will move significantly forward, causing the furniture to tilt forward.

Therefore, in order to reliably prevent the furniture from tipping over, it is preferable to fix the furniture to the wall using appropriate fixing fittings, but if the wall is made of concrete or earth, it is not easy to fix the furniture. In addition, the fixing work is complicated and looks unsightly, so it is very rare for furniture users to proactively use fixing fittings to fix furniture.

Therefore, the present invention is normally stored inside a furniture frame in a state that is completely invisible from the outside, and when an earthquake occurs and the furniture vibrates, the front end of the furniture is automatically lifted according to the degree of vibration. The main purpose of this invention is to provide a device that automatically prevents furniture from tipping forward with an extremely simple structure and at low cost.

The details of the present invention will be described below based on the embodiments shown in the drawings.

A pair of air cylinders 3 equipped with a piston 1 and a piston rod 2 and with the piston rod 2 extending downward are vertically attached to both ends of the inner surface of the front wall B of the furniture frame A. The piston 1 is constantly pressed downward by a spring 4, and air flows into the lower cylinder chamber 3A divided by the piston through a check valve (one-way valve) 5 that is always open only in the outflow direction. An outlet 6 and a manual on-off valve 7 that can be opened and closed manually.
An air opening 8 is provided between the upper chamber 3B and the upper chamber 3B is opened to the atmosphere through an air outlet 18. Furthermore, a manual locking mechanism 9 is provided for locking and releasing the movement of the piston and the piston rod connected thereto. In the embodiment shown in the figure, the locking mechanism is a threaded rod 1 whose tip fits into a recess 10 formed on the outer peripheral surface of the upper part of the piston.
1 is screwed onto the cylinder wall 12, and by inserting a rotating fitting such as a screwdriver into the hole 13 penetrating the front wall B of the furniture frame A and rotating the screw rod. It is formed to lock and release the movement of the cylinder. Also, manual on-off valve 7
Another hole 14 passing through the front wall B of the furniture frame
It is shaped so that it can be operated by inserting an appropriate tool into it.

In the figure, reference numeral 15 indicates a base plate pivotally attached to the lower end of the piston rod 2, and reference numeral 16 indicates a hole cover.

In the above configuration, when the manual lock mechanism 9 is released after the furniture is installed in a predetermined position, the piston 1 moves downward by the pressing force of the spring 4, and the base plate 15 at the lower end of the piston rod comes into contact with the floor surface C. It will stop at the specified position. In this case, the upper cylinder chamber 3B is open to the atmosphere, and the lower cylinder chamber 3A is also open only in the direction from the outlet 6 to the atmosphere via the check valve 5, so the cylinder rod is always held by the spring 4. It is in a state of being pressed downward. If an earthquake were to occur in such a situation, the furniture would vibrate back and forth as shown in Figure 3.
At this time, in the present invention, if the front end of the furniture lifts up even a little, the lifting load on the piston rod is removed, so the furniture moves downward by the amount of the lift. Due to this downward movement, the weight of the furniture is applied to the piston rod, but since the check valve 5 prevents the air from flowing into the lower cylinder chamber 3A, the piston 1 cannot move upward. The furniture is therefore held with the front end raised, ie tilted backwards.

If you want to return the furniture to its original position after the ground has subsided, operate the manual on-off valve to
By allowing air to flow into A, it can be restored to a horizontal position.

In the above embodiment, the check valve 5 was provided at the air outlet 6, but instead of this, a check valve 5' that opens only in the air inflow direction is provided as shown in FIG.
may be provided at the air inlet 18'. In this case, the lower air outlet 6' is open to the atmosphere, and the air outlet 8' equipped with a manual opening/closing valve 7' is provided on the cylinder upper chamber 3B side. As a result, the piston rod 2 is always allowed to move downward, but is prevented from moving upward, and the same effect as in the embodiment described above is achieved.

As described above, according to the present invention, if the front end of the furniture lifts even a little due to the vibration of the furniture due to an earthquake, the piston rod will sequentially protrude downward by the amount of the lift, changing the posture of the furniture to a backward position, that is, a position of the room. By keeping the furniture leaning against the wall, it is possible to prevent the furniture from tipping forward due to the forward leaning of the furniture, such as protruding drawers or natural opening of the door, as described above. Since the members are housed inside the furniture frame, they have great effects such as not damaging the appearance of the furniture. In addition, in the present invention, when installing furniture, if the lock mechanism is released and the front end of the furniture is lifted by hand, the piston rod will move down by the amount of lifting, similar to the case of furniture vibration, so that wedges and It is possible to easily correct the forward leaning posture and left/right balance of the furniture without having to perform complicated work such as fitting the floor plate into the lower surface of the front end of the furniture.Therefore, it can also be used as a balancer for adjusting the posture of furniture during normal times. be.

In the present invention, instead of the structure shown in the embodiment described above, the manual lock mechanism is provided with a second manual on-off valve 17 at the air outlet 6' for manually opening and closing the air outlet 6', as shown in FIG. It can also be configured accordingly. In this case, if the manual on-off valve is closed, air will not be allowed to flow out from the cylinder lower chamber 3A, and the downward movement of the piston rod will be locked.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a cross-sectional view, FIG. 2 is a cross-sectional view showing the operating state, FIG. 3 is an explanatory view showing furniture vibration during ground vibration, and FIG. FIG. FIG. 5 is a sectional view showing still another embodiment. 1...Piston, 2...Piston rod, 3...Air cylinder, 3A...Cylinder lower chamber, 3B...Cylinder upper chamber, 4...Spring, 5...Check valve, 6...Air outlet, 7...Manual on/off valve, 8...Air release Mouth, 9...Manual lock mechanism.

Claims (1)

[Claims] 1 At least a pair of air cylinders equipped with a piston and a piston rod, with the piston rod extending downward, are attached to both front ends of the interior of the furniture frame, and the piston is constantly pressed downward by a spring, and the piston is An air outlet is provided in the lower chamber of the divided cylinder, and an air inlet is provided in the upper cylinder chamber, and the air inlet is provided with a check valve that opens only in the inflow direction, or the air outlet is provided with a check valve that opens only in the outflow direction. A furniture tilting device comprising: a check valve that opens only when the piston rod is opened, an air release port equipped with a manual opening/closing valve in the cylinder chamber on the side where the check valve is provided, and a manual locking mechanism that locks and releases the movement of the piston rod. Prevention device.