JPH0678706B2 - How to adjust the damper force of the door damper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention provides a resistance force by using a spring, and the resistance force provides a buffering action against a door load torque when opening and closing a door, that is, a braking force. The present invention relates to a method of making it possible to adjust the damper force (braking force) by adjusting the spring force in a door damper adapted to exhibit the above.

<< Conventional Technology >> In a conventional door damper using a spring,
The spring has one end in the housing and the other end in
The springs are wound in the winding direction by the rotation of the movable shafts, which are arranged in the housing in a state of being respectively locked by the movable shafts that are rotatable by an external force. The structure is such that the spring force that gives the rotational force of is obtained.

<Problems to be Solved by the Invention> However, in the above-described conventional damper, if the damper force is to be adjusted, the spring must be replaced with a spring having a different spring constant. It is time consuming, laborious and not easy.

The present invention has been made in view of such problems of conventional dampers, and an object of the present invention is to adjust a spring force by an easy operation of rotating an adjustment shaft in a left-right direction. Thus, there is provided a method for adjusting the damper force of a door damper in which the damper force can be freely adjusted.

<< Means for Solving the Problems >> To achieve the above object, the present invention provides
A damper force adjusting method for a door damper in which a spring is arranged so that it can be wound in the winding direction by rotation of a movable shaft that is rotatable by an external force, and the winding direction is opposite to that of the spring in the housing. The adjusting spring, which is press-fitted in a facing arrangement, is rotated in the winding direction by a rotatable adjusting shaft that is engaged with one end of the adjusting spring with a required clearance in the circumferential direction. By moving the fixed end of the spring in the rewinding direction through the spring receiver that interlocks with the other end, and rotating the adjusting shaft in the direction opposite to the above direction, the clearance required in the circumferential direction is obtained. The spring retainer engaged with the spring is rotated in the same direction to move the spring fixed end in the winding direction. Damping force adjustment method of a door damper which is characterized in that so as to adjust the grayed force are intended to provide.

<< Action >> When an external force is applied to the movable shaft as a rotational force in the clockwise direction, when the movable shaft is rotated, the movable end of the spring, the spring, and the fixed end of the spring are interlocked with each other. Is interlocked with a latching spring receiver, and one end of an adjusting spring press-fitted in the housing is interlocked with the spring receiver in a winding direction opposite to that of the spring.

At this time, since one end of the adjusting spring is interlocked (rotated) in the unwinding direction, the diameter of the adjusting spring is expanded, and the outer periphery of the adjusting spring bites the inner peripheral surface of the housing to be in a locked state.

In this way, since the adjusting spring is fixed to the housing, the fixed end of the spring is fixed via the spring receiver, so that the spring is wound in the winding direction and bent. The spring generates a pear that rotates the movable shaft in the counterclockwise direction.

When the movable shaft is rotated in a certain direction, the spring is wound in the winding direction and bends, and in order to generate power, the fixed end of the spring must be fixed. , Fix the spring fixed end with the adjustment spring (one-way clutch),
The power can be adjusted by generating the power and moving and adjusting the spring fixed end in the winding direction or the rewinding direction.

<Example> Hereinafter, the following description will be given with reference to the drawings showing specific examples of the damper for the door used for carrying out the method of the present invention.

As shown in FIGS. 1 to 4, in the laterally cylindrical housing 1, a shaft hole is formed at the center of the end wall 1a which is one end side thereof.
1b is penetrated and the lid plate 2 is fitted in the opening on the other end side.

The movable shaft 3 connected and fixed to a door (not shown) has the shaft hole 1b.
The housing 1 is rotatably supported by the housing 1 so as to be rotatable therethrough.

The movable shaft 3 is provided with a flange 3a at a portion located inside the housing 1, and the flange 3a is provided at the end wall 1
By being inscribed in each of the a and the peripheral wall 1c, they are arranged on the center line of the housing 1.

The power generating spring 4 arranged in the housing 1 is mounted on a portion of the movable shaft 3 protruding into the housing 1, and the movable shaft 4a is hooked on the flange 3a.

The spring 4 is arranged so that the movable end 4a of the spring 4 is rotated in the winding direction by rotating the movable shaft 3 in the direction of arrow a shown in FIG.

The spring receiver 5 for fixing the fixed end 4b of the spring 4 so as to be displaceable and the adjusting shaft 6 for rotating the spring receiver 5 are formed into a cylindrical shape having the same outer diameter. Formed on the opposite end faces in the axial direction of both of them, a convex strip 7 is provided on one of the opposite end faces in the axial direction so as to project in the axial direction, and a concave groove strip 8 is provided on the other opposing end face. It is provided in the diametrical direction in a state of being recessed in the axial direction, and the both 7, 8 are engaged with each other.

Here, the concave groove strip 8 is formed so as to be inclined with respect to the convex strip 7 by a required angle in the circumferential direction, whereby the spring receiver 5 and the adjusting shaft 6 are circumferentially inclined as shown in FIG. Is in an engaged state with a required clearance c.

The spring receiver 5 has a bearing recess 5a at the center thereof on the end face opposite to the end face on which the ridge 7 is provided, and the inner recess of the movable shaft 3 is provided in the bearing recess 5a. It is rotatably fitted.

On the other hand, the adjustment shaft 6 is located on the end face opposite to the end face on which the groove 8 is provided, and the shaft 6a is provided so as to project in the axial direction from the center thereof, and the shaft 6a is provided at the center of the lid plate 2. Through shaft hole 2a
The spring receiver 5 and the adjustment shaft 6 are on the axis of the movable shaft 3 in the engaged state with a required clearance c in the circumferential direction, so that the housing 1
Is rotatably arranged on the center line of the.

Further, the spring receiver 5 is provided with a recessed hole 5b at an eccentric position on the end face where the bearing recess 5a is provided, and the fixed end 4b of the spring 4 is hooked on the recessed hole 5b.

The adjusting spring 9 arranged in the housing 1 is formed to have a constant outer diameter by closely winding a spring steel wire having a square cross section, a cross section, or the like, and both ends thereof. The hooks 9a and 9b are bent.

The adjustment spring 9 is in a non-contact state with the spring receiver 5 and the adjustment shaft 6, and the spring 4
And the winding direction is opposite, and they are fitted so as to come into pressure contact with the inner peripheral surface of the housing 1. This constitutes a one-way clutch, and the hook 9a at one end thereof is
The spring receiver 5 is engaged with a recessed groove 5c provided on the outer peripheral surface of the spring receiver 5 in a state in which there is no rattling in the circumferential direction, and the hook 9b at the other end is recessed on the outer peripheral surface of the adjustment shaft 6. It is engaged with the widening concave groove 6b so as to secure a required clearance d in the circumferential direction.

The adjustment shaft 6 is fitted with the adjustment dial 10 by forming a square shaft portion 6c on the protruding end of the shaft 6a protruding outward from the shaft hole 2a so as to be rotatable from the outside of the housing 1. After that, the dial 10 is fastened and fixed to the shaft 6a with the screw 11.

A coil spring is preferably used as the spring 4, but a rod-shaped torsion spring may be adopted. In this case, the movable shaft 3 is hollow and the torsion spring is used. It is good to decorate.

The above damper, for example, in the closed position at 90 ° in the vertical state,
When used for a flap door or the like that is in the open position at 0 ° in the horizontal state, an external force, that is, a door opening force acts on the movable shaft 3 as a rotational force in the direction of arrow a shown in FIG. Then, when the movable shaft 3 rotates, the movable end of the spring 4
4a, the spring 4, the fixed end 4b, the spring receiver 5, and the hook 9a of the adjusting spring 9 are sequentially interlocked with each other, and the hook 9a is rotated in the rewinding direction, so that the adjusting spring 9 is expanded in diameter and the outer circumference thereof. Bites on the inner peripheral surface of the housing 1, whereby the fixed end 4b of the spring 4 is fixed to the housing 1 via the spring receiver 5.

Therefore, the spring 4 is wound in the winding direction, and the power for rotating the movable shaft 3 in the arrow (b) direction in FIG. 1 is generated.

Here, the power straight line g in this case is preset so as to have a shape close to the door load torque curve h at the time of opening and closing the door shown in FIG.

Therefore, the resistance force due to the power is exerted as a buffering action against the door load torque, that is, as a braking force,
The door slowly moves from the 0 ° open position to the 90 ° closed position,
It will be closed smoothly.

Next, the method according to the present invention will be described in detail below with reference to the drawings.

When the power is not adjusted, the spring receiver 5 is urged clockwise by the spring force acting in the direction of arrow i as shown in FIG. It is held in a positional relationship.

First, when it is desired to adjust the power of the spring 4 to be weak, use the adjustment dial 10 to adjust the adjustment shaft 6 to the positions shown in FIGS.
When rotated clockwise as shown by arrow e in the figure and FIG. 4 (C), the hook 9b of the adjusting spring 9 is rotated clockwise, whereby the adjusting spring 9 is wound in the winding direction to reduce the diameter. Then, the hook 9a of the other side is also rotated in the same direction because it is rotated in the clockwise direction without sticking to the inner peripheral surface of the housing 1, whereby the spring receiver 5 is accompanied by the fixed end 4b of the spring 4. Then, it is rotated clockwise.

As a result, the winding direction of the spring 4 is opposite to that of the adjusting spring 9, so that the fixed end 4b of the spring 4 is rotated in the unwinding direction, and the movable shaft 3 moves the movable end 4a to the arrow a in FIG. By being rotated in the direction, the amount of the spring 4 wound in the winding direction is reduced.

In other words, the flexure of the spring 4 is reduced.

Therefore, the power of the spring 4 proportional to the amount of deflection becomes weak.

When adjusting the power to the next higher level, use the adjustment dial.
10, the adjustment shaft 6 is rotated in the counterclockwise direction indicated by the arrow f in FIGS. 2, 3, and 4 (B),
The spring receiver 5 cooperates with this and is rotated counterclockwise, but since the spring receiver 5 and the adjustment shaft 6 are engaged with each other with a required clearance c in the circumferential direction, Even if the power of the spring 4 acts on the hook 9a in the clockwise direction via the spring receiver 5, the clearance c does not apply a force to the other hook 9b by interlocking the adjusting shaft 6 with the clearance c. The hook 9b is not wound in the winding direction by the power of the spring 4, and the adjusting spring 9 is not rotated in the clockwise direction.

Further, since the adjusting shaft 6 and the hook 9b are engaged with each other with a clearance d in the circumferential direction, the hook 9b is fitted in the adjusting shaft 6 with each other.
Therefore, the spring 9 is not rotated in the counterclockwise direction, and the spring receiver 5 is interlocked with the adjustment shaft 6 to rotate the hook 9a in the counterclockwise direction. However, the hook 9a is rotated in the counterclockwise direction. Is the direction in which the adjustment spring 9 is wound, the diameter of the adjustment spring 9 is reduced, and the adjustment spring 9 is rotated counterclockwise without biting the inner peripheral surface of the housing 1.
The spring receiver 5 is interlocked with this, and the fixed end 4b of the spring 4 is also rotated counterclockwise.

That is, since the fixed end 4b is rotated in the winding direction of the spring 4, the amount of winding of the spring 4 in the winding direction due to the rotation of the movable shaft 3 is increased and the deflection thereof is increased, and thus the spring 4 is rotated. Power becomes stronger.

Incidentally, D in FIG. 5 shows the power adjustment range of the spring 4.

<< Advantages of the Invention >> As described above, according to the damper force adjusting method for a door damper of the present invention, the movable shaft is rotated by an external force, whereby the spring is wound in the winding direction,
In a door damper that obtains a damper effect by the power in the rewinding direction, an adjusting spring and a spring receiver that are press-fitted in a housing in a direction opposite to the above-mentioned spring by the rotation of an adjusting shaft by the rotation of an adjusting shaft. Since the fixed end of the spring can be pivotally fixed in the winding direction or the rewinding direction by adjusting the power of the spring, and the damper force can be adjusted by this, Since the damper force with respect to the load torque can be adjusted freely within a predetermined range, the door can be set at a desired opening / closing speed and quickly adjusted to a predetermined speed by an extremely easy operation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional side view of a one-door damper used for carrying out a method for adjusting a damper force of a door damper according to the present invention,
FIG. 2 is an exploded perspective view of a spring, a spring receiver, an adjusting shaft, and an adjusting spring in the door damper, and FIG. 3 is a cross-sectional view showing a relationship between the spring receiver, the adjusting shaft, and the adjusting spring in the door damper. Figure 4 (A)
(B) and (C) are explanatory views showing the relationship between the spring receiver and the adjustment shaft in the tamper force unadjusted state, the strengthened adjusted state, and the weakened adjusted state of the door damper, and FIG. 5 is the door when the door is opened and closed. It is a graph which respectively shows a load torque curve, a spring power straight line with respect to door load torque, and its power adjustment range. 1 ... Housing 3 ... Movable shaft 4 ... Spring 4a ... Movable end 4b ... Fixed end 5 ... Spring receiver 6 ... Adjustment shaft 9 ... Adjustment springs c, d ... Clearance

Claims (1)

[Claims] 1. A damper force adjusting method for a door damper, wherein a spring is arranged in the housing so that the spring can be wound in a winding direction by rotation of a movable shaft which is rotatable by an external force. , A winding direction of the adjusting spring, which is press-fitted in a direction opposite to the direction of the winding direction of the spring, by a rotatable adjusting shaft engaged with one end of the adjusting spring with a required clearance in the circumferential direction. By rotating the adjusting shaft in the direction opposite to the direction while moving the fixed end of the spring in the rewinding direction by interposing a spring receiver that interlocks with the other end of the adjusting spring, Rotate the spring receiver, which is engaged with this with a required clearance in the circumferential direction, in the same direction so that the spring fixed end moves in the winding direction. Movement damping force adjusting method of a door damper which is characterized in that so as to adjust the spring force by.