JPH08135298A - Damper for door closer with temperature compensating mechanism - Google Patents

Abstract

PURPOSE: To improve the function, by changing the sliding area of a rotor and a movable body to freely adjust the brake force and changing the sliding area of the rotor and the movable body by a bimetal to offset the viscosity change of a viscous fluid. CONSTITUTION: A linear motion or the like of a sliding door is converted to a rotary motion through a mechanism like rack and pinion to rotate a rotor 3 and also the torque is braked by the drag of a viscous fluid 2. In this time, a movable body 5 is shifted by an adjusting screw 4. The sliding contact area of the movable body 5 and the rotor 3 is changed to adjust the braking force. The bimetal 6 is warped greatly in a low temperature for instance. The contact area of the rotor 3 and the movable body 5 is reduced to cope with the change of viscosity of the fluid 2 and make the damping force constant even if a temperature difference has arisen. A one-way clutch is provided in the pinion or the like to block the rotary motion of pinion not to transfer it to the damper on opening the door. In this way, the brake force can be easily adjusted and the device can cope with the change of environmental temperature and the door also can be opened with a little force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper device for a door closer, which is used for sliding doors and hinged doors, and which brakes the self-closing door when the opened door is closed by an appropriate self-closing means. The present invention relates to a damper device for a door closer with a temperature compensation mechanism, which can exert a stable damper force even with a change in ambient temperature.

[0002]

2. Description of the Related Art For example, in a door closer for sliding doors and hinged doors, when the opened door closes itself, it is possible that the door may reach a rapid speed and collide with the door frame with a loud noise. To prevent this, a damper (braking) mechanism for braking the closing operation is usually provided. As the damper (braking) mechanism, for example, an air cylinder type, a hydraulic type such as a cylinder type or a pump type, or the like is widely known.

[0003]

By the way, among such damper mechanisms, for example, those of the air cylinder type, air noise is generated, the device itself is large, and installation work is difficult. Has caused the inconvenience. Further, the hydraulic damper mechanism has drawbacks such as high cost and easy oil leakage.

Under these circumstances, attention has recently been paid to a fluid friction resistance capable of producing a reliable damper force using, for example, a relatively large viscous fluid, and a damper mechanism utilizing this fluid friction resistance has been attracting attention. Development is under consideration. By the way, this fluid friction resistance cannot be easily changed when adjusting the speed of the door when it is closed, and it is fixed at a constant value.
In other words, it is preferable to eliminate the braking force when the door is opened because the door opening operation is performed without requiring a large force, but this is also difficult to realize, and the viscous fluid that is normally used is also used. Since the viscosity change with respect to the temperature change tends to change as shown in FIG. 5, there is a possibility that the viscosity of the viscous fluid may greatly change depending on the environmental temperature and a stable damper force may not be exerted.

In view of the above circumstances, the present invention makes it possible to adjust the door closing speed by utilizing the fluid friction resistance and to provide a stable braking force even when the ambient environmental temperature changes greatly. It is an object of the present invention to provide a damper device for a door closer with a temperature compensation mechanism that can exhibit the above-mentioned effects.

[0006]

That is, the present invention is used for sliding doors and hinged doors, and when the opened door is closed by an appropriate self-closing means, the damper device for a door closer is used to brake the self-closing door. The fluid filled in the housing of the damper device, the movable body provided inside the housing, and the rotating body that slides / rotates between the movable body and the inner wall surface of the housing, A shaft body movable in a direction parallel to the central axis with respect to the movable body; a bimetal and a spring provided between the shaft body and the movable body so as to sandwich the movable body on both sides; A damper for moving the movable body in a direction in which the movable body is screwed to move the movable body in a direction in which the contact area with the rotating body is changed, and the damper of the rotating body is moved by moving the position of the movable body via the shaft body by operating the adjusting screw. Change and adjust the force as well as the temperature change of the fluid Utilizing the thermal expansion and contraction action of the bimetal in order to offset the resulting viscosity change with the bimetal, the axial contact area between the rotating body and the movable body is changed according to the ambient temperature change. It is composed.

[0007]

According to the present invention, the movable body provided inside the housing is appropriately moved by the adjusting screw, and the contact / sliding area between the rotating body and the movable body is changed by changing the position of the movable body. It is possible to freely adjust the braking force of the movable body with respect to the rotating body. In addition, according to the present invention, even if the viscosity of the viscous fluid changes greatly due to a change in ambient temperature, the contact / sliding area between the rotating body and the movable body is changed by utilizing the thermal expansion / contraction action of the bimetal. For example, a change in viscosity can be offset by a change in contact / sliding force, and a constant damper force can be constantly exerted even if the temperature environment changes.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing a damper device with temperature compensation mechanism applied to a door closer for a sliding door according to a first embodiment of the present invention.

The damper device with the temperature compensation mechanism is
When self closing, it is for braking the rotational force of a pinion (not shown) that meshes with a rack (not shown) fixed to a guide rail member (not shown) on the door frame (not shown) side, It is fixed to a bracket (not shown) attached to the upper surface of the sliding door. In this embodiment, as the self-closing means, a guide rail member is used which is inclined slightly downward in the door closing direction, but of course a spring or the like may be used.

As shown in FIG. 1, the damper device with a temperature compensation mechanism of the first embodiment has a housing 1, a viscous fluid 2 filled in the housing 1, and a rotatable body 1 with respect to the housing 1. Of the rotating body 3, the adjusting screw 4 attached to the bottom of the housing 1, the shaft body 51 screwed to the adjusting screw 4, the shaft body 51 is engaged, and along the groove 1A of the housing 1. A movable body 5 that moves only in the vertical direction and is prevented from rotating, a bimetal 6 and a spring 7 pressed against the movable body 5 and the shaft 51, and a rotating pinion (not shown) rotating in one direction. And a clutch (not shown) that transmits only to the braking shaft 3A.

As the viscous fluid 2, a viscous fluid having a viscosity characteristic that is less likely to be affected by ambient temperature changes is used. In this embodiment, the temperature changes in viscosity are about 1 / third compared with mineral oil.
Dimethyl silicone oil of about 50 is used. As the viscous fluid of this embodiment, one having a small temperature change in viscosity is used as described herein, but the viscous fluid is not limited to such a small temperature change. In other words, in the present invention, the change in viscosity is offset by utilizing the contraction / expansion of the bimetal between the rotating body and the movable body, so that even a fluid having a relatively large viscosity characteristic can be used. is there.

The rotating body 3 is formed to have an inner diameter that maintains a very small gap with respect to the outer peripheral surface of the movable body 5, and is installed inside the housing 1 filled with the viscous fluid 2. The rotary body 3 is adapted to be converted into rotary motion of a sliding door through an appropriate mechanism such as a rack and pinion, which is transmitted to rotate the rotary body.

The adjusting screw 4 adjusts the damper force by changing / adjusting the contact / sliding area between the movable body 5 and the rotating drum 3, and is provided in the bottom of the housing 1 in a rotatable state. And is screwed with the shaft body 51.

The movable body 5 is a casing 1 filled with a viscous fluid.
It is installed inside so as to be movable in the direction of the central axis. More specifically, as shown in FIG. 2, protruding portions 5A protruding from the outer peripheral surface (four locations in this embodiment) are formed inside the housing 1. It is designed to engage in serration engagement with the engagement groove 1A provided.
The movable body 5 can be moved by rotating the adjusting screw 4.

The movable body 5 is, as shown in FIG.
The shaft body 51 is serration-engaged with the engagement hole 5B in a state of penetrating the center portion thereof, and the bimetal (the one having a relatively strong elastic force is used) 6 and the spring (this also has the same rigidity force). 7 are disposed between the flanges 51A and 51B formed at both ends of the shaft body 51 and both surfaces of the movable body 5 so as to face each other. As shown in FIG. 1, the shaft body 51 has a screw hole, in which a female screw with which the adjusting screw 4 is screwed, is cut, formed in one of the flanges 51B. In addition, the bimetal 6 of this embodiment is configured such that it bends more greatly at low temperatures and the contact area with the rotating body 3 decreases, and the rate of change in the curvature is the change in viscosity of the viscous fluid 2. What is adjusted to the optimum value according to the rate may be used.

The clutch transmits the rotational movement of the pinion to the braking shaft 3A when the pinion rotates in a certain direction, that is, when the sliding door closes, and the sliding door is opened to move the pinion in the other direction. When rotating, the rotating motion of the pinion is the braking shaft 3A.
The one-way clutch is used.

Therefore, according to this embodiment, the viscous fluid 2
The viscosity of the sliding door is used to control the closing motion of the sliding door to suppress the closing speed of the sliding door when it closes itself, so that a collision with the door frame does not occur when the sliding door is completely closed. Has become. By operating this adjusting screw 4, it is possible to easily set and adjust the optimum damper force (braking force) according to the weight of the sliding door to be used, the purpose of use in the place where it is installed, and the self-closing speed. it can. That is, when the adjusting screw 4 is rotated, the shaft body 51 that is in serration engagement with the movable body 5 is provided.
Moves in the axial direction, and the movable body 5 also moves in the same direction inside the housing 1 via the bimetal 6 and the spring 7 that are in pressure contact with the shaft body 51.

The movable body 5 and the rotating body 3 generally decrease (increase) in viscosity when the viscosity of the viscous fluid 2 cancels out the temperature change, that is, when the external environment is at high temperature (low temperature). Therefore, the bending operation of the bimetal 6 is decreased (increased) so that the contact area between the movable body 5 and the rotating body 3 is increased (decreased) by a value that exactly cancels out this change.
If it does, a certain damper force (braking force) can be reliably exerted even with a seasonal temperature change.

In this embodiment, the fluid friction resistance type damper device is applied to a door closer for a sliding door, but the present invention is not limited to this sliding door, for example, as a damper device in various types of door closers for a sliding door. Application is also possible.

Next, another embodiment according to the present invention will be described. In this embodiment, the same parts are designated by the same reference numerals to avoid redundant description. FIG. 3 shows an essential part of a damper device with a temperature compensation mechanism according to a second embodiment of the present invention. In this damper device with a temperature compensation mechanism,
As shown in FIG. 4, the movable body 8 is formed of a generally cylindrical bottomed cylinder, and the spring 7 and the bimetal 9 are arranged oppositely to the first embodiment.

Unlike the previous embodiment, the bimetal 9 of this embodiment is bent more greatly at high temperatures, and the rotating body 3 is bent.
The one that has a structure in which the contact area with is increased is used, and the curve change rate may be adjusted to an optimum value in accordance with the viscosity change rate of the viscous fluid 2.

[0022]

As described above, according to the present invention, the braking shaft is provided with the clutch so that the rotation of the door can be braked only when the door is closed. When the door is opened, the braking force is not transmitted to the door side so that it can be opened with the lightest force possible. Therefore, it is preferable to use the fluid friction resistance in the door closer of the construction equipment etc. It is possible to realize various damper mechanisms.

Further, according to the present invention, the position of the movable body which is engaged with the moving shaft body and is brought into pressure contact with the spring and the bimetal by appropriately moving the shaft body provided inside the housing with the adjusting screw. By varying the contact / sliding area between the rotating body and the movable body to change the friction braking force of the movable body with respect to the rotating body, anyone can easily and freely adjust the damping force (braking force). In addition, the self-closing speed can be easily changed and set.

Further, according to the present invention, the bimetal is provided, and the bimetal is bent by the temperature change so that the contact area of the movable body and the rotating body is changed by a value that exactly cancels the temperature change of the viscosity of the viscous fluid. Because of the configuration, the damper force (braking force) can always be reliably exerted at a constant level even when the seasonal temperature change is large and the external environment is large.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a damper device for a door closer with temperature compensation according to a first embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a main part of a damper device for a door closer with temperature compensation according to the first embodiment.

FIG. 3 is a schematic sectional view showing a damper device for a door closer with temperature compensation according to a second embodiment of the present invention.

FIG. 4 is a schematic perspective view showing a main part of a damper device for a door closer with temperature compensation according to a second embodiment.

FIG. 5 is a graph showing a temperature characteristic of viscosity of a viscous fluid used in the damper device.

[Explanation of symbols]

 1 Case 2 Viscous Fluid 3 Rotating Body 4 Adjustment Screw 5 8 Movable Body 6 9 Bimetal 7 Spring 51 Shaft Body

Claims (1)

[Claims] 1. A damper device for a door closer, which is used as a sliding door or a hinged door, and which brakes the self-closing door when the opened door is closed by an appropriate self-closing means, the housing of the damper device. A fluid filled inside, a movable body provided inside the casing, a rotating body that slides / rotates between the movable body and the inner wall surface of the casing, and a central axis parallel to the movable body. And a spring provided between the shaft body and the movable body so as to sandwich the movable body on both sides, and a shaft body that is screwed with the shaft body and is in contact with the rotating body. An adjusting screw for moving the movable body in a direction of changing the area, and changing and adjusting the damper force of the rotating body by moving the position of the movable body via the shaft body by operating the adjusting screw, and Change in viscosity with temperature change of bimetal The thermal expansion and contraction action of the bimetal is used to offset the temperature, and the axial contact area between the rotating body and the movable body is configured to change according to the ambient temperature change. Damper device for door closer with compensation mechanism.