JPH0623671Y2 - Damper mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a damper mechanism capable of adjusting a door closing speed (hereinafter referred to as a door closing speed) by hydraulic pressure.

[Conventional technology]

Conventionally, as this type of damper hinge, for example, one shown in FIG. 4 is known. This damper hinge
An upper hinge tubular body 101 having an upper hinge blade 100,
The lower hinge cylinder body 102 having the subordinate hinge blades 102 is disposed adjacent to each other on the coaxial line. Upper hinge cylinder 1
The protruding portion of the shaft 104, which is provided so as to project at 01,
It is located inside the lower hinge cylinder 103 and is rotatably mounted via a bearing 105. Further, a piston 106 is mounted by spline-engaging with the protruding portion of the shaft 104 and screwed into the inner wall of the lower hinge tubular body 103. A speed regulating passage 108 and a valve passage 109 are formed in the bottom wall of the moving hole 107 of the piston 106.
A taper portion 111 of the speed control rod 110 is penetrated at 08, and a check valve 112 is mounted at the valve passage 109. The damper chamber 1 which is the sliding hole 107 formed by sandwiching such a bottom wall
13 and the cylinder chamber 114 are filled with oil 115, and the flow rate of the oil moving between the damper chamber 113 and the cylinder chamber 114 is limited to control the door closing speed. When the upper hinge cylinder 101 is rotated in the door opening direction, the piston 106 screwed in the lower hinge cylinder 103 moves upward, and the oil in the sliding hole 107 opens the check valve 112 and the damper. It flows into the chamber 113.
Then, by the urging force of the spring, the upper hinge cylinder 1
When 01 rotates in the door closing direction, the piston 106 screwed into the lower hinge tubular body 103 moves downward, and the damper chamber 11
Reduce 3 As a result, the check valve 112 is closed in the valve passage 109.
The oil in the oil chamber 113 is closed by the speed control rod 110.
Flows into the piston chamber 107 through the speed-regulating passage 108 that is speed-controlled by. Since the passage area of the speed control passage 108 is gradually narrowed with the downward movement of the piston 106, the moving flow rate of the oil is reduced and the piston 1
The downward movement of 06 is restricted. In this way, the rotation speed of the upper hinge tubular body 101 in the door closing direction, that is, the door closing speed is limited.

By the way, in the damper mechanism having such a configuration, it is possible to operate and set the speed governing rod, and freely adjust the door closing speed according to the place of installation and the preference of the user. Therefore, the governor rod is operated and set at the time of shipment or at the time of installation.

[Problems to be solved]

However, in the damper mechanism having such a configuration, the viscosity characteristic of the oil that adjusts the door closing speed slightly changes depending on the temperature. There is a phenomenon that the door closing speed increases as a result. On the contrary, when the temperature is low in winter, the oil becomes highly viscous, the inflow speed slows down, and the door closing speed is delayed.Therefore, there is an annual change in the door closing speed, so how to prevent this change is an important issue. ing.

Therefore, it is possible to operate the speed governing rod as described above at any time and adjust it according to the season, etc., but it is cumbersome to perform such an operation at any time, and in reality it is left unattended, It's a problem.

In view of the above problems, the present invention has an object to provide a damper mechanism which can be automatically adjusted to a constant closing speed regardless of ambient temperature changes, and which is particularly reliable over a long period of time. Is.

[Means for Solving the Problems]

That is, according to the invention, a hinge cylinder body in which damper oil is enclosed in an internal oil chamber, a bearing attached to the hinge cylinder body, a rotary shaft rotatably inserted in the bearing, and a hinge cylinder body are inserted. Spline engagement on the tip side of the rotating shaft,
And a piston that is screwed into the hinge cylinder, a check valve that prevents damper oil from flowing in from a valve passage provided in the piston when the door is closed, and a speed control means provided in a speed control passage of the piston. In the damper mechanism, the speed control means is fixedly mounted on the temperature-sensing portion containing a fluid that expands and contracts due to temperature change, and directly above the temperature-sensing portion, and seals the fluid in the temperature-sensing portion together with the temperature-sensing portion. Then, the film portion pushed by the expansion operation of the fluid, the movable portion having a tapered tip that slides upward in the speed control passage by the pushing operation on the film portion side, and the sliding operation of the movable portion It has a guide part that opens a guide hole for guiding and the temperature sensing part is integrally formed in the lower part, and the movable part slides in accordance with the change of the outside air temperature, and the flow rate of the damper oil passing through the speed control passage is controlled. It is configured to control.

[Action]

The damper mechanism of the present invention can appropriately control the flow rate of the damper oil that passes through the speed control passage due to the movable part being pushed out by the fluid such as wax that changes according to the ambient temperature change. Then the fluid expands,
Since the movable part is pushed through the membrane part and moves forward, the amount of damper oil passing through the speed control passage is greatly limited, so that the increase of the closing speed caused by the decrease in viscosity of the damper oil due to the temperature increase is effectively performed. By this, the door closing speed can be automatically kept substantially constant.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a damper mechanism according to the present invention,
This damper mechanism is provided with a speed control means 2 which is operated by a fluid (not shown) on the piston 1 side.

Reference numeral 3 is fixed to the door frame (not shown) side, a hinge cylinder body in which damper oil 4 is enclosed, 5 is a bearing fixedly attached to the hinge cylinder body 3, and 6 is a rotation on the bearing 5. The rotary shafts that rotate together with the freely attached door (not shown) are shown, and the same rotary shafts are used for both of them.

In the piston 1, the tip end side of the rotary shaft 6 is spline-engaged with the central portion, and the valve passage 1a forming the check valve 7 and the speed regulating passage 1b having the speed regulating means 2 are provided in the vicinity of the central portion. Has been formed. Further, a male screw portion 1c is provided on the outer peripheral surface side of the piston 1, and is adapted to be screwed into a female screw portion 3a provided on the inner wall surface side of the hinge tubular body 3 so as to rotate when the door is opened. The shaft 6 rises in the hinge cylinder 3 while rotating in a predetermined direction, and when the door is closed, the shaft 6 rotates in the opposite direction and rotates in the hinge cylinder 3. It is designed to descend.

The speed control means 2 eliminates the inconvenience that the viscosity characteristic of the damper oil changes in accordance with the change of the outside temperature, for example, the temperature change in the summer or winter, or the daytime or the night, and the door closing speed changes accordingly. In other words, it effectively prevents the damper oil from having a low viscosity at high temperatures such as summer or daytime to increase the door closing speed, and at the same time, the damper oil has a high viscosity at low temperatures such as winter or night, resulting in a door closing speed. Prevents the descent of the door and automatically keeps the door closing speed substantially constant even when the outside temperature changes. For this reason,
In the speed control means 2 of this embodiment, as shown in the graph of FIG. 2, a wax 8 which is a fluid (hereinafter referred to as a fluid) whose volume greatly expands and contracts when the temperature changes is used. ing. That is, as shown in FIG. 3, the speed control means 2 is fixed to the inner wall side of the piston 1 and has a temperature sensing portion 9 containing a wax 8 as its fluid and a film portion 10.
And a semi-fluid body 11, a guide portion 12 and a movable portion 13. The temperature-sensitive portion 9 propagates external heat to the wax 8 side via the damper oil 4 that is in contact with the outer peripheral surface side, and is formed in a thin wall shape by a material having good thermal conductivity. The film portion 10 is made of flexible rubber or the like, and the peripheral portion is fixedly attached to the boundary portion between the temperature sensitive portion 9 and the guide portion 12, and is attached to the wax 8 and the semi-fluid material. A diaphragm that partitions the body 11 is configured. When the film portion 10 is pushed upward by the volume expansion of the wax 8, the semi-fluid body 11 surely pushes the movable portion 13 upward by the increase of the internal pressure generated at this time. In other words, the one whose volume change with temperature change is small is used. Movable part 13
Is for automatically adjusting the flow rate of the damper oil 4 passing therethrough while the tip side enters the speed control passage 1b in the piston 1. The tip side is made of a taper-shaped rod-shaped wax 8 Due to the change in the volume of the guide portion 11, it moves back and forth along the guide hole 12a of the guide portion 11.

Therefore, according to the damper mechanism of this embodiment, when the outside air temperature rises in the summer, for example, the volume of the wax 8 of the speed control means 2 expands and the movable portion 13 is pushed up. as a result,
The speed control passage 1b of the piston 1 is narrowed, and the speed control passage 1b is narrowed.
Since the flow rate of the damper oil 4 passing through b is regulated,
It is possible to automatically adjust the increase in the closing speed with the decrease in the viscosity of the damper oil 4.

〔effect〕

As described above, the damper mechanism according to the present invention pays attention to a large volume change of a fluid such as wax caused by a temperature difference in the summer and winter, and the speed control means adjusts the volume change of the fluid. It is configured to take out as a forward / backward movement of the movable part that enters the fast passage, and the speed change means automatically changes the door closing speed due to the viscosity change of the damper oil due to the temperature change. Since the correction adjustment is performed, a substantially constant door closing speed can be obtained throughout the year regardless of summer, winter, day and night, etc., and it is possible to obtain a very large effect such that there is no need to perform troublesome door closing speed adjustment according to changes in the outside temperature. .

Further, according to this invention, since the fluid forming a part of the speed governing means is completely sealed by the temperature sensing portion and the membrane portion, there is no fear that the fluid will leak out from the gap or the boundary portion. We can provide highly reliable products over a long period of time.

[Brief description of drawings]

FIG. 1 is a sectional view showing a damper mechanism according to the present invention, FIG. 2 is a graph showing a correlation between temperature and volume of an expansion / contraction fluid used in the damper mechanism according to the present invention, and FIG. 3 is related to the present invention. FIG. 4 is an enlarged sectional view showing the structure of the speed control means of the damper mechanism, and FIG. 4 is a sectional view showing the conventional damper mechanism. 4 ... Damper oil, 3 ... Hinge cylinder, 5 ... Bearing, 6 ... Rotating shaft, 1 ... Piston, 1a ... Valve passage, 7 ... Check valve, 1b ... Speed regulating passage, 2 ...... Speed control means, 8 ...... (fluid) wax, 9 ...... Temperature sensing part, 10 ...... Membrane part, 13 ...... Movable part, 12 a ...... Guide hole, 12 ...... Guide part.

Claims (1)

[Scope of utility model registration request] 1. A hinge cylinder (3) in which a damper oil (4) is enclosed in an internal oil chamber, a bearing (5) attached to this hinge cylinder (3), and freely rotatable on this bearing (5). A rotary shaft (6) inserted into the hinge cylinder (3) and a piston (3) spline-engaged with the rotary shaft (6) inserted into the hinge cylinder (3) and screwed into the hinge cylinder (3). 1) and a check valve (7) that prevents the damper oil (4) from flowing in from a valve passage (1a) provided in the piston (1) when the door is closed,
In a damper mechanism provided with a speed control means (2) provided in a speed control passage (1b) on the piston (1) side, the speed control means (2) applies a fluid (8) that expands and contracts due to temperature change. The temperature-sensing part (9) housed therein, and the fluid (8) fixedly provided immediately above the temperature-sensing part (9) and sealed together with the temperature-sensing part (9). The membrane portion (10) pushed upward by the expansion operation of (8) and the membrane portion (1
0) A movable part (13) having a tapered tip that slides upward in the speed control passage (1b) by a pushing motion and a guide hole (12a) that guides the sliding motion of the movable part (13). And a guide part (12) integrally formed with the temperature sensing part (9) in the lower part, and the movable part (13) slides in accordance with a change in the outside air temperature to move the speed control passage (1b). A damper mechanism characterized in that it is configured to control the flow rate of damper oil (4) passing through.