JPH0247182Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to an improvement of a door damper used to prevent a severe impact when closing an entrance door, an interior door, etc.

<Conventional Example and Problems> Conventionally, as shown in Fig. 3, two hinges have been provided at the rotating base of door D, one hinge SP has a built-in spring that biases it in the closing direction, and the other The hinge 100 has a built-in damper mechanism,
Some are designed to close quickly at the start of closing and slowly at the end of closing.

FIG. 4 shows the structure of the damper mechanism built into the hinge 100.

A rod 400 fixed in one hinge cylinder 200 and rotating together with the other hinge cylinder 3
It is loosely inserted facing into 00. The rod 400
A spline 410 is provided near the tip of the
0 has a regulating rod B screwed into it. Hinge tube 30
A piston 500 is loaded into the liquid chamber 310 of No. 0, and the piston 500 engages with a female screw portion 320 and reciprocates while rotating.
10 meshes with the spline 410 of the rod. A piston 500 is attached to the bottom wall 501 of the piston.
The orifice 5 communicates the inner hole of the liquid chamber 310 with the liquid chamber 310.
30 and a check valve 520 are provided. The tip of the regulating rod B is formed into a tapered pin B1 and is connected to the inner hole of the piston and the orifice 53.
0 is loosely inserted through it.

R1 is an O-ring for sealing the liquid chamber 310 and the inner surface of the hinge cylinder 300, and R2 is the liquid chamber 31.
0 and the rod 400, R3 is the through hole 420 of the rod 400 and the regulating rod B
and a seal for sealing. P1 and P2 are attachment plates fixed to the hinge tubes 200 and 300, respectively, and are attached to the door D and the wall W.

Thus, when the hinge cylinder 200 and the rod 400 rotate when the door is closed, the piston 500 is raised. At this time, check valve 520
is closed, and the inner hole 510 of the piston and the liquid above flow into the lower cylinder chamber 310 through the orifice 530. However, as the piston 500 rises, the opening area of the orifice 530 increases
1, the liquid resistance increases and the rotational speed of the hinge cylinder 200, that is, the closing speed of the door D is braked.

However, according to the damper mechanism described above, the control width of the orifice opening diameter using the taper pin is small, so even a slight displacement adjustment of the governor rod can cause the damper effect to be too strong, causing the door to stop half-open or vice versa. The door may rotate and close with a violent collision while the damper effect is hardly working. Therefore, it is difficult to make adjustments to provide a suitable damping function. especially,
The viscous resistance of the internal liquid changes depending on the temperature, so the damping characteristics tend to change due to changes in the environmental temperature at the place of use, but if the adjustment range is small as described above, it is necessary to adjust for each temperature change. It's complicated and complicated.

Three seals are required to prevent liquid leakage, but having such a large number of seals increases the risk of liquid leakage. In particular, in the above configuration, since the rod 400 fixed to the hinge cylinder 200 is inserted into the cylinder chamber 310, the rotation axis of the rod 400 may shift due to rattling of the door, creating a gap in the seal portion, or There is a drawback that the ring R2 receives excessive frictional force and wears out quickly, causing fluid leakage.

Furthermore, since there are a large number of parts that require precision machining, manufacturing and assembly processes are complicated and costs are high.

<Means for solving the problems> The present invention was proposed to eliminate the various drawbacks mentioned above, and its purpose is to provide a wide range of damping action, that is, a wide adjustment range for control. To provide a hinge type door damper that can easily set and adjust a wide and stable damping effect.

Another object of the present invention is to provide a hinge-type door damper that hardly causes a liquid leakage accident by having only one sealing portion for preventing liquid leakage.

Still another object of the present invention is to provide a hinged door damper that operates accurately without causing liquid leakage or abnormal friction or wear due to rattling rotation of the door.

Still another object of the present invention is to provide a hinged door damper that has a simple structure, is easy to assemble, and can be manufactured at low cost.

The above purpose is to provide a hinge-type door damper in which a mounting plate is fixed to a pair of upper and lower hinge cylinders, and a damper mechanism is built in the hinge cylinders.
An operating rod is reciprocated within the hinge cylinder by the rotation of one hinge cylinder, and the passive rod is loaded in the other hinge cylinder so that its position can be adjusted in the cylinder axis direction, and the passive rod is in opposition to the operating rod. a cylindrical casing that projects a part of the passive rod from one end and supports the passive rod in a liquid-tight manner; and a cylindrical casing formed within the casing; A liquid chamber having a tapered chiyoke groove in a part of the inner wall, a piston fixed to the passive rod and capable of reciprocating in the liquid chamber, and having a valve hole penetrating in the thickness direction thereof, and the valve. A hinge-type door damper comprising a valve for opening and closing a hole and a compression spring for restoring the passive rod, the door damper being provided so as to widen the adjustment range of the damping action. It is achieved by doing so.

<Example> Next, the door damper 1 according to the present invention will be explained in more detail according to the example shown in FIGS. 1 to 3.

Reference numerals 2 and 3 designate a pair of upper and lower hinge cylinders, which are rotatably connected to each other via a spacer 11. 4 is loaded into the upper hinge cylinder 2 and has a male threaded portion 42.
This is an operating rod that is threadedly connected at the bottom, and a spline 41 is provided on the circumferential surface near the lower end thereof. 31 is a spline provided on the inner surface of the lower hinge cylinder 3, and is engaged with the spline 41 of the operating rod so as to be able to reciprocate up and down. Reference numeral 32 denotes a female threaded portion formed at the lower part of the inner surface of the lower hinge cylinder 3. 6 is a damping unit that is removably loaded in the lower hinge cylinder 3, and includes a casing 61 formed in a cylindrical shape.
A male threaded portion 6a is provided on a part of the circumferential surface of the cylinder, and is screwed into the female threaded portion 32 so that the loading position can be adjusted in the direction of the cylinder axis. Reference numeral 62 denotes a passive rod that protrudes from the upper end of the casing 61 and is disposed so that its tip can come into contact with the lower end of the operating rod 4.

Therefore, when the door is closed, the door D is inserted through the mounting plate P1.
When a rotational force of Because it is rotated, it can be moved downward without rotating. Due to this downward movement, the operating rod 4 presses the passive rod 62, but at this time, the damping unit 6 having the following internal structure
As a result, a damping effect occurs, causing the door to rotate quickly at the initial stage of closing, and is braked so that it rotates slowly near the end of closing.

In the figure, 6b is an engagement recess for adjusting the screwing depth of the damping unit 6, that is, the stroke range of the passive rod 62, and 21 and 33 are detachable caps.

An embodiment of the internal structure of the damping unit 6 is shown in FIG. Reference numeral 63 denotes a liquid chamber formed inside the casing 61, and a plurality of channel grooves 63 having a tapered cross section are formed in a part of the inner wall of the liquid chamber.
A is provided.

A passive rod 62 inserted into the casing 61 so as to be retractable is sealed liquid-tight by a packing 64. 65 is a piston that is fixedly supported by the passive rod 62 and is arranged to be able to reciprocate within the cylinder chamber 63, and 65a and 65b are valve holes that are bored through the piston 65 in the thickness direction. 66 is a plate ring-shaped valve, which opens valve holes 65a and 6 in response to hydraulic pressure.
Open and close the lower opening of 5b. 67 is piston 65
and a C-ring for preventing the valve 66 from slipping out, and 68 a compression coil spring for return interposed between the C-ring for preventing the dislodging 67 and the bottom of the cylinder chamber in the cylinder chamber 63. A guide member 69 supports and guides the passive rod 62, and has an air chamber 69a between it and the inner surface of the casing 61. Thus, a liquid corresponding to the volume of the passive rod 62 entering the cylinder chamber 63 is provided so as to be able to flow into and out of the air chamber 69a.

The above configuration produces the following damping effect.

That is, when the operating rod 4 descends and presses the passive rod 62, the piston 65 descends. At this time,
Since the valve 66 closes the valve holes 65a and 65b, the liquid in the cylinder chamber 63 flows to the upper side of the piston 65 through the yoke groove 63a. Therefore, when the piston 65 starts descending, the liquid moves smoothly and the piston 65 is deep.
descends speedily with relatively little liquid resistance, but as the piston 65 continues to descend, the depth of the yoke groove 63a decreases, so the movement of the liquid is gradually restricted, and the piston 65 is subjected to greater liquid resistance as it descends. Therefore, after passing through the check groove 63a, the liquid enters the maximum liquid resistance region.

Therefore, the door rotates quickly at the beginning of closing, and rotates slowly near the closing end point to complete closing, so that the closing operation is smooth overall.

On the other hand, when the upper hinge cylinder 2 is reversed when opening the door, the operating rod 4 rises and the pressure on the passive rod 62 is released, so the elastic force of the return spring 68 causes the piston 65 and the passive rod to move. 62 is forced to return. At this time, since the valve 66 opens the valve hole 65a, the liquid above the piston 65 moves downward through both the passages of the valve hole 65a and the yoke groove 63a. Therefore, the return operation of the piston 65 is quickly performed. Moreover, the operating rod 4 and the passive rod 62
are not fixed and can be separated, so even when the door is opened rapidly faster than the return speed of the passive rod 62, the liquid resistance at the time of return of the damping unit 6 does not act at all, and the door can be opened easily. .

Note that it is also an embodiment within the scope of the present invention to form a part or all of the inner surface of the return spring 68 as a series of grooves over the entire circumference, instead of dividing the groove 63a into a plurality of parts as shown in the figure. It is.

<Effects> According to the present invention, the above-mentioned objectives can be well achieved, such as ease of adjustment due to the wide range of damping action, and the simple structure makes molding and assembly easy, and also contributes to miniaturization. It is something.

[Brief explanation of the drawing]

Fig. 1 is a central longitudinal cross-sectional view showing an embodiment of the door damper according to the present invention, Fig. 2 is a central longitudinal cross-sectional view showing an embodiment of the damping unit, Fig. 3 is a usage state diagram, and Fig. 4 is a known known door damper. FIG. 1...Door damper, 2...Upper hinge tube, 3...
Lower hinge cylinder, 4... Operating rod, 6... Damping unit, 31... Spline, 32... Female threaded part, 41... Spline, 42... Male threaded part, 6
DESCRIPTION OF SYMBOLS 1...Casing, 62...Passive rod, 63...Cylinder chamber, 63a...Chiyoke groove, 64...Puttlekin, 65...Piston, 65a, 65b...Valve hole, 68...Returning spring, 6a... ...Male thread part, 6b... Engagement recess.

Claims (1)

[Claim for Utility Model Registration] In a hinge-type door damper in which a mounting plate is fixed to a pair of upper and lower hinge cylinders and a damper mechanism is built in the hinge cylinders, the rotation of one hinge cylinder causes reciprocating movement within the hinge cylinder. and a damping unit which is loaded in the other hinge cylinder so that its position can be adjusted in the cylinder axis direction, and whose passive rod is disposed in opposition to the operating rod, the damping unit A cylindrical casing that protrudes a part of the passive rod from one end and supports the passive rod in a liquid-tight manner; a chamber; a piston fixed to the passive rod so as to be able to reciprocate in the liquid chamber and having a valve hole passing through the liquid chamber; a valve for opening and closing the valve hole; and returning the passive rod. 1. A hinged door damper comprising: a compression spring for causing damping; and a hinge type door damper.