JPH01137088A - Door damper - Google Patents

Abstract

PURPOSE: To prevent the occurrence of a large impulsive sound and damage by providing a door damper made of an air cylinder, and absorbing an impulse occurring when a door collides with a wall with the elastic force of cushioning materials provided on the damper and the air resistance of air chambers. CONSTITUTION: An air cylinder 7 is constituted of a cylinder main body 8 having orifices 13 on end walls, a piston 9, return springs 10a, 10b, piston rods 11a, 11b and rubber caps 12a, 12b fixed to their outer end sections as cushioning materials and provided in air chambers (a), (b). A door damper made of the air cylinder 7 is fitted to a door 1 with the outer end sections of the rods 11a, 11b protruded on both faces of the door 1. When the door 1 is opened, the rubber cap 12a or 12b collides with a wall before the final point of the turn, and an impulse can be absorbed by the elastic force of the springs 10a, 10b and the air resistance in the air chambers (a), (b).

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a damper suitable for absorbing impact when a hinged door is rotated to open.

<Prior art and its problems> -III. In entrance doors and interior doors used in houses, one end base is supported by a hinge, and the other end is a free end and is rotatable in left and right directions. It is being

When opening such a revolving door, if you do not hold your hand all the way to the end, it may collide with the room wall at the final point of the opening rotation, producing a loud impact sound and causing damage. Ta.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional circumstances, the present invention provides a door damper that can absorb the impact when a door collides with a wall or the like at the final point of opening rotation, thereby preventing generation of large impact noise and damage. The purpose is to

<Means for Solving the Problems> For this reason, the present invention provides a cylinder body, a piston disposed slidably in the axial direction within the cylinder body, and a cylinder partitioned by the piston and formed within the cylinder body. two air chambers, a return spring disposed in each air chamber for normally positioning the piston approximately at the center of the cylinder body, and end walls facing each other in the axial direction of the cylinder body, respectively. An air cylinder comprising a penetrating piston rond, a buffer material attached to each outer end of the piston rond, and an air hole for communicating the two air chambers in the cylinder body with outside air, and a door. This door damper has a cylinder body embedded and fixed within the wall thickness of the door, and is installed so that the outer end of a piston rod projects from both sides of the door.

In this configuration, when the door is opened, the cushioning material at the outer end of one of the piston ronds on the side that contacts the wall of the door hits the wall, etc., before the final point of the opening rotation. As a result, the piston slides gently while being subjected to the elastic force of the return spring and the resistance of the air in the cylinder chamber, and is subjected to a damping action, so that the impact at the final point of opening the door is absorbed.

In addition, in a door damper having such a configuration, the outer ends of the piston ronds are installed so as to protrude from both sides of the door plate surface, so even if the opening/closing direction of the door is changed, the cushioning material of the other piston rond is Hitting a wall etc.

Therefore, the two-way door damper is capable of exerting a damping effect regardless of the direction in which the door opens or closes relative to the entrance.

<Example> Next, one embodiment of the present invention will be described based on the drawings.

1 and 2 show an embodiment in which the present invention is applied to a door l used in a house, such as an entrance door or an interior door.

That is, the door 1 has one end base supported by a hinge 2, and the other end is a free end so as to be rotatable in the left-right direction.

Note that 3 is a knob provided at the free end of the door 1, and 4 is a door stopper provided on the wall 5 on the side that the door 1 hits when it is opened.

The door damper 6 according to the present invention is attached to the upper part of the door 1.

Next, the configuration of the door damper 6 is shown in FIG.

In this figure, 7 is an air cylinder constituting the door damper 6 according to the present invention, 8 is a cylindrical cylinder body, 9 is a piston that is slidably installed in the axial direction of the cylinder body 8, 10a, 10b. is an air chamber a of the cylinder body 8 partitioned into two by the piston 9;

The piston 9 is normally held at a substantially central position in the axial direction within the cylinder body 8.

11a and Ilb are piston rods that respectively pass through end walls facing each other in the axial direction of the cylinder body, and rubber caps 12a and 12b as cushioning materials are provided at the outer ends of the piston rods, respectively.
is fixed.

13 An orifice serving as an air hole that connects each of the air chambers a and b to the outside air, and is opened in the end wall of the cylinder body 8 that faces each other in the axial direction.

A mounting flange portion 14 is integrally formed on the outer edge of one end of the cylinder body 8 and extends in a direction perpendicular to the axial direction.

The door damper 6 having such a configuration is installed by inserting the cylinder body 8 into the installation hole of the door 1 so that the outer ends of the piston rods Ila and Ilb protrude from both sides of the door plate surface.

That is, a mounting hole 15 is formed through the upper part of the door l near the base at one end. Then, the cylinder body 8 is fitted into the mounting hole 15 from the end where the mounting flange portion 14 is not provided. At this time, the mounting flange portion 14 is fitted into an annular groove 16 formed around the mounting hole 15 on the outer surface of the door 1, and the mounting flange portion 14 is fixed to the door with screws 17. On the other hand, a ring member for attachment is fitted onto the outer circumference of the end of the cylinder body 8 where the attachment flange portion 14 is not provided.

An annular groove 18 is formed in this ring member 19,
After the end wall of the cylinder 8 is fitted into the annular groove 18, it is fixed to the door 1 using screws 20. In addition, flange part 1
4 may not be integrally molded with the main body 8, but may be formed to be removably attached to the cylinder main body like the ring member 19.

The operation of the door damper 6 having such a configuration will be explained.

As shown by the solid line in FIG. 2, when the door 1 is opened, the piston rod lla protrudes toward the side that contacts the chamber wall 5 before the final point of its opening rotation, that is, before the door 1 hits the door stopper 4. The outer end of the rubber 12a abuts against this wall 5. As a result, the piston 9 slides gently while being subjected to the elastic force of the return spring 10b and the resistance of the air in the air chamber a, and the impact at the final opening point of the door 1 is absorbed by the damping action.

Note that after this, the free end of the door 1 will be moved to the door stopper 4.
I bump into it.

Therefore, when opening the door 1, even if the door 1 is not opened completely with one's hand, it will not collide with the wall at the final point of the opening rotation and cause a large impact noise, and damage can be prevented.

In addition, in the door damper 6 having such a configuration, since the outer ends of the piston rods lla and llb are attached to the door l so as to protrude, for example, when the door 1 is attached to the position shown by the dotted line in FIG. Even if the opening/closing direction of the door is reversed, the rubber 1 of the other piston rod llb
2b abuts against the opposite side of the chamber wall 5 and can exert a similar damping effect.

As a result, the single door damper 6 can easily accommodate different opening and closing rotation directions of the door l, and there is no need to change the mounting direction of the door damper for each door with a different mounting direction, which is convenient.

Note that the door damper 6 may be set in advance on the door 1 and distributed in the market, or it may be distributed independently as a device that can be used for existing doors.

Furthermore, since the configuration is simple using the air cylinder 7, it can be provided at low cost.

<Effects of the Invention> As explained above, according to the door damper of the present invention, it is possible to absorb the impact at the final point of opening the door, and when opening the door, even if the door is not opened completely with the hand, the door damper can absorb the impact at the final point of the opening rotation. It is possible to prevent damage by colliding with the wall at a point and causing no large impact noise, and it is possible to exert a damping effect regardless of the mounting position of the door, that is, the direction in which the door is opened or closed. It is easy to use, convenient, has a simple configuration, and can be provided at low cost.

[Brief explanation of the drawing]

FIG. 1 is a front view of a door showing an application example of the door damper according to the present invention, and FIG. 2 is a schematic diagram showing the opening and closing direction of the same door.
FIG. 3 is a sectional view taken along the line A-A in the figure, showing the structure of one embodiment of the damper. 1... Door 2... Hinge 5... Wall 6... Door damper 7... Air cylinder 8... Cylinder body 9... Piston 10... Return spring 11... Piston rod 12... Rubber 13... Orifice Fig. 1

Claims (1)

[Scope of Claims] A cylinder body; a piston disposed slidably in the axial direction within the cylinder body; two air chambers partitioned by the piston and formed within the cylinder body; a return spring disposed in each chamber to normally position the piston approximately at the center of the cylinder body; a piston rod passing through axially opposing end walls of the cylinder body; Consisting of an air cylinder equipped with cushioning material attached to each outer end, and an air hole that communicates the two air chambers in the cylinder body with outside air, the cylinder body is embedded and fixed within the wall thickness of the door. A door damper is provided in which the outer end of a piston rod is attached to both sides of the door so as to protrude from both sides of the door.