JPH0613338Y2 - 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 rotary shaft 104, which is provided to project at 01, is located inside the lower hinge tubular body 103 and is rotatably mounted via the bearing portion 105. Also, the rotating shaft 10
4 is spline-engaged with the protruding portion 4 and the lower hinge tubular body 1
The piston 106 is mounted by screwing on the inner wall of 03. A speed regulating passage 108 and a valve passage 109 are formed in the bottom wall of the sliding 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 into the lower hinge cylinder 103 is rotated.
Moves upward and the oil in the sliding hole 107 opens the check valve 112 and flows out into the damper 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 freely adjust the door closing speed by operating and setting it according to the place where the speed governor is installed 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-mentioned problems, the present invention provides a damper mechanism that can always be automatically adjusted to a constant closing speed regardless of ambient temperature changes and that prevents damper oil from leaking and has increased reliability. That is the purpose.

[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,
The piston that is screwed into the hinge cylinder, the check valve that prevents the damper oil from flowing from the valve passage provided in the piston when the door is closed, and the damper oil that passes through the speed regulation passage provided on the piston side In a damper mechanism provided with a speed regulating rod for limiting a flow rate and adjusting a door closing speed, an upper side of the adjusting rod is slidably inserted into a slide hole provided in the rotary shaft, and a slide hole in the rotary shaft is provided. A temperature-sensing part containing a solid solution that expands and contracts due to temperature change in the upper part of the rotary shaft is provided with a spring that pushes the speed control rod upward, and the solid solution in this temperature-sensing part together with the temperature-sensing part. Sealed,
And an adjusting means having an elastic film part that moves by the expansion operation of the solid solution and a movable shaft that is pressed by the moving operation on the film part side and presses the speed governing rod against the elastic force of the spring. The rotary shaft is provided so as to be completely closed.

[Action]

In the damper mechanism of the present invention, the movable shaft is extruded by the solid solution such as wax which changes according to the change of the ambient temperature, and the speed control rod engaged with the movable shaft also moves to control the flow rate of the damper oil passing through the speed control passage. It can be controlled appropriately, for example, in a high temperature environment such as summer, the fluid expands, the movable shaft is pushed through the membrane part and the speed governor is pushed down with it, and the amount of damper oil passing through the speed control passage is reduced. Since it is largely limited, the increase in the door closing speed caused by the decrease in viscosity of the damper oil due to the temperature increase is effectively suppressed. Also, in a low temperature environment such as winter, the solid solution such as wax contracts, weakens the pressing operation of the movable shaft, and eases the downward movement of the speed control rod, so the damper oil also passes through the speed control passage. As a result, it is possible to effectively suppress the decrease in the door closing speed that occurs due to the increase in the viscosity of the damper oil due to the temperature decrease, and thereby 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 includes a compression spring 2, a speed control rod 3, and an adjusting means 4 in a slide hole 1a of a rotary shaft 1.

Reference numeral 5 is a piston, 6 is a hinge cylinder body fixed to the door frame (not shown) side, and a damper oil 7 is enclosed inside, and 8 is a bearing fixedly attached to the hinge cylinder body 6, respectively. Both of them are the same as the conventional ones.

The rotating shaft 1 rotates together with a door (not shown), is formed in a substantially cylindrical shape with a bottom by a substance having a relatively high thermal conductivity, and is rotatably attached to the bearing 8 side, as shown in FIG. As shown, the slide hole 1a having the same inner diameter is formed on the center side and the through hole 1b is formed on the bottom side. Since the rotary shaft 1 also rotates the piston 5 at the same time when the door is rotated, the protrusion 1c is formed on the outer peripheral surface side of the rotary shaft 1 as in the conventional one, and the piston 5 side is splined. It is supposed to meet.

The compression spring 2 is configured to apply an elastic force to the speed governing rod 3 to push the speed governing rod 3 upward, and the sliding collar portion 3a of the speed governing rod 3 and a rotary shaft which will be described next. 1 and the bottom wall surface 1d.

The speed control rod 3 slides in the slide hole 1a, that is, when the outside temperature is high in summer or daytime, it is pushed downward by the adjusting means 4, and the outside temperature in winter or night is low. Sometimes it is pushed upward by the compression spring 2. The speed governing rod 3 of this embodiment has the above-described sliding flange 3a having a substantially flat plate shape on the upper part, and the tapered tapered surface 3b from the middle part to the lower part. With the tapered surface 3a side protruding from the through hole 1b of the rotary shaft 1, the slide hole 1
It is inserted in a. The tip end side of the tapered surface 3a is inserted into a speed control passage 9a of a valve seat 9 fixed to the piston 5 side, which will be described later.

The adjusting means 4 eliminates the inconvenience that the viscosity characteristic of the damper oil 7 changes according to the change of the outside air temperature, for example, the temperature change of 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 7 from having a low viscosity when the temperature is high in the summer or daytime and the door closing speed from increasing, while the damper oil 7 has a high viscosity when the temperature is low in the winter or night. The door closing speed is prevented from decreasing, and the door closing speed is automatically kept substantially constant even if the outside air temperature changes. Therefore, in the speed control means 2 of this embodiment, as shown in the graph of FIG.
The temperature is from T ₁ (eg −10 ° C.) to T ₂ (eg +40).
The wax 10 is used as a solid solution (hereinafter referred to as a solid solution) having a large expansion coefficient in which the volume greatly expands or contracts when the temperature changes between 10 ° C.). That is, as shown in FIG. 2, the adjusting means 4 is fixed to the slide hole 1a of the rotary shaft 1 and is a solid solution of the wax 10.
Temperature-sensing part 11 accommodating the housing, film part 12, and guide part 14
And a movable shaft 15. The temperature sensing unit 11 is
The external heat is propagated to the wax 10 side through the rotary shaft 1 and the like that are in contact with the outer peripheral surface side, and is formed in a thin shape by a material having good thermal conductivity. The film portion 12 is made of flexible rubber or the like, and the peripheral side is fixedly attached to the boundary portion between the temperature sensitive portion 11 and the guide portion 14, and the wax 10 is enclosed. A diaphragm that partitions the room from the room 13 on the lower side thereof is configured. In particular, the film portion 12 forms a completely sealed space together with the temperature sensing portion 11, and the wax 10 is enclosed in the space. Wax 1
When the film portion 12 is pushed downward by the volume expansion of 0,
Due to the increase in internal pressure generated at this time, the film portion 12
Pushes the movable shaft 15 downward. The movable shaft 15 has a sliding flange portion 3 on the tip end side of which is an upper portion of the speed control rod 3.
The taper surface 3 of the speed control rod 3 is disposed in the speed control passage 9b provided in the valve seat 9 on the piston 5 side while engaging with the engagement groove 3c formed in the a.
b is moved up and down to automatically adjust the flow rate of the damper oil 7 passing through the speed control passage 9b.
Due to the change in the volume of the guide portion 14, the guide portion 14 moves back and forth in the vertical direction along the guide hole 14a.

The piston 5 has a valve seat 9 in which a tip end side of the rotary shaft 1 is spline-engaged with an inner wall surface of a central portion and a valve passage 9a and a speed control passage 9b forming a check valve are formed in a lower end portion. It is stuck. Further, a male screw portion 5c is provided on the outer peripheral surface side of the piston 5, and is adapted to be screwed into a female screw portion 6a provided on the inner wall surface side of the hinge tubular body 6 so as to rotate when the door is opened. The shaft 1 rises in the hinge cylinder 6 while rotating in a predetermined direction, and when the door is closed, the shaft 1 rotates in the opposite direction and rotates in the hinge cylinder 6. It is designed to descend.

Therefore, according to the damper mechanism of this embodiment, the viscosity of the damper oil 7 decreases, for example, when the outside air temperature rises in the summer, but at the same time, the volume of the wax 10 of the adjusting means 4 expands, so that the movable shaft 15 increases. Is pushed down. As a result, the speed control rod 3 is also pushed down, the speed control passage 9b provided in the valve seat 9 on the piston 5 side is narrowed, and the flow rate of the damper oil 7 passing through the speed control passage 9b is restricted. It is possible to automatically correct and adjust the increase in the closing speed due to the decrease in the viscosity of the oil 7.

Similarly, for example, when the viscosity of the damper oil 7 rises and the outside air temperature decreases in winter, the volume of the wax 10 decreases, so that the pushing force to the movable shaft 15 is weakened, and the elastic force of the compression spring 2 causes the movable shaft 15 to move. It is pushed higher than in summer. As a result, the speed control rod 3 moves upward and the speed control passage 9b is expanded, so that the decrease in the closing speed due to the increase in the viscosity of the damper oil 7 can be automatically corrected and adjusted.

〔effect〕

As described above, the damper mechanism according to the present invention pays attention to a large volume change of the solid solution caused by a temperature difference in the summer and winter, such as wax, and the adjusting means controls the volume change of the solid solution. It is configured to take out as the advancing / retreating motion of the speed governing rod entering the passage. Since it is corrected and adjusted, a substantially constant door closing speed can be obtained throughout the year regardless of summer, winter, day and night, etc., and it is not necessary to perform troublesome door closing speed adjustment according to changes in the outside temperature. To be

Further, according to this invention, the damper oil is completely enclosed inside the hinge cylinder and the inside of the rotary shaft, and for example, even if it leaches out to the upper part between the speed control rods, the upper part of the rotary shaft is enclosed. Since it is completely sealed by the adjusting means, there is no risk of leakage to the outside, and the reliability can be improved.

Further, according to this invention, since the solid solution is enclosed in the space which is completely sealed by the temperature sensing part and the film part, there is no leakage of the solid solution, and it is possible to provide a more reliable one.

[Brief description of drawings]

FIG. 1 is a sectional view showing a damper mechanism according to the present invention, and FIG.
FIG. 3 is an enlarged cross-sectional view showing the structure of the adjusting mechanism of the damper mechanism according to the present invention, and FIG. 3 is a graph showing the correlation between the temperature and volume of the expansion / contraction fluid used in the damper mechanism according to the present invention,
FIG. 4 is a sectional view showing a conventional damper mechanism. 7 ... Damper oil, 6 ... Hinge cylinder, 8 ... Bearing, 1 ... Rotating shaft, 5 ... Piston, 9a ... Valve passage, 9b ... Speed control passage 3
...... Speed control rod, 1a …… Slide hole, 2 …… (compression) spring, 11 …… Temperature sensing part, 10 …… Wax (solid solution), 12 …… Membrane part, 15 …… Movable shaft, 4 …… Adjustment means.

Claims (1)

[Scope of utility model registration request] 1. A hinge cylinder (6) in which a damper oil (7) is enclosed in an internal oil chamber, a bearing (8) attached to the hinge cylinder (6), and freely rotatable on this bearing (8). Piston (5) that is spline-engaged with the rotary shaft (1) that is inserted into the hinge cylinder and the distal end side of the rotary shaft (1) that is inserted into the hinge cylinder (6) and that is screwed into the hinge cylinder (6). ), A check valve for preventing the damper oil (7) from flowing in from the valve passage (9a) provided in the piston (5) when the door is closed, and the speed control passage (9a) provided on the piston (5) side. ), A damper mechanism provided with a speed control rod (3) for limiting the flow rate of the damper oil (7) passing therethrough and adjusting the closing speed, and adjusting the slide hole (1a) provided in the rotary shaft (1). The upper side of the speed rod (3) is slidably inserted, and the slide hole (1) in the rotary shaft (1) is inserted. ) The governor rod (3) is arranged push up the spring (2) upwards, and at the top of the rotary shaft (1), the expansion at temperature changes,
A temperature sensing part (11) containing a contracting solid solution (10),
The solid solution (10) in the temperature sensing part (11) is connected to the temperature sensing part (1).
(1) A film part (12) having an elasticity that seals together with the solid solution (10) and moves by the expansion operation of the solid solution (10), and the speed-adjusting rod is pressed down by the movement operation on the side of the film part (12) and the elasticity of a spring Movable shaft (15) that pushes against force
A damper mechanism, characterized in that the adjusting means (4) having the above is provided in a state of completely closing the inside of the rotary shaft.