JPH0960678A - Damper of fluid frictional resistance type - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a general purpose damper of fluid frictional resistance which can easily change or finely adjust the braking force of rotation movement or the absorbing force of vibration movement in various kinds of fields such as various devices, furniture and automobile and therefore is expected to be widely applied to various kinds of fields. SOLUTION: This damper is provided with fluid filled in an equipment body, a movable body 6 mounted in the body, a rotating body 5 sliding and rotating against the movable body 6, a braking shaft 3F integrally rotating with the rotating body 5 and an adjusting screw 3D for moving the movable body 6 in the direction which can change the contact range with the rotating body 5. Damping force or rotating speed of the braking shaft 3F is changed or adjusted by moving the position of the movable body 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid friction resistance type damper device capable of damping the rotational movement of various mechanical devices, doors such as furniture, and absorbing various mechanical vibrations. .

[0002]

2. Description of the Related Art Various kinds of doors and doors have been developed and used in various electric appliances and furniture. Also, for example, a door closer is very commonly attached to this door, etc., but when the opened door closes itself, the door reaches a rapid speed at the time of closing, which is a big problem. A damper mechanism for braking the closing operation is provided in order to prevent the door frame from making a noise. As the damper (braking) mechanism, for example, an air cylinder type and a hydraulic type such as a cylinder type and a pump type are widely known.

[0003]

Among such damper mechanisms, for example, those of the air cylinder type, such as generation of air noise, large size of the device itself, difficult installation work, etc. It causes inconvenience. Further, the hydraulic damper mechanism has drawbacks such that oil leakage easily occurs, and in particular that the hydraulic pump method is expensive.

Under these circumstances, a fluid frictional resistance, which is capable of producing a reliable damper force by using a fluid having a relatively large viscosity, has recently attracted attention.
Development of a damper mechanism utilizing this fluid frictional resistance is under study. As a damper device utilizing this fluid frictional resistance, for example, a damper device having a structure in which several discs are stacked is under study. Generally, such a damper device is relatively easy to downsize and is compact.
It is relatively difficult to change and adjust the speed to be braked, and the application is limited to a limited special field where such speed adjustment is not necessary.

Therefore, in view of the above-mentioned circumstances, the present invention can easily change and finely adjust the braking of the rotational motion and the absorption of the vibration motion in various fields such as various devices and furniture, and thereby the invention can be applied to various fields. It is an object of the present invention to provide a highly versatile fluid friction resistance type damper device, which is expected to be widely applied.

[0006]

That is, the invention according to claim 1 is for braking / moving motions or vibrations of various mechanical devices.
A damper device that absorbs fluid, which slides / rotates between a fluid filled in the housing of the device, a movable body provided inside the housing, and the movable body and an inner wall surface of the housing. A rotating body and a braking shaft that rotates integrally with the rotating body,
An adjusting member for moving the movable body in a direction in which the contact area with the rotating body can be changed, and the damper force or the rotation speed of the braking shaft is changed / adjusted by the position movement of the movable body. Is.

According to the second aspect of the present invention, the axial length of the rotating body is kept constant, and the axial length of the movable body is changed along the circumferential direction of the movable body. In this configuration, the overlapping contact area between the rotating body and the movable body is changed by rotating the adjusting member such as the adjusting rod or the adjusting screw, and the damper force is adjusted / changed.

[0008]

According to the present invention, the movable member provided inside the housing is appropriately rotated by the adjusting member, and the contact / sliding area between the rotating member and the movable member is changed by changing the position of the movable member. For example, it is possible to easily change and finely adjust the damper force of the movable body with respect to the rotating body, and further, the damper force and the rotating speed of the rotating body, and further, doors and doors of various fields such as various devices and furniture.

[0009]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the accompanying drawings. FIG. 1 shows a damper device 3 applied to a door according to a first embodiment of the present invention. The damper device 3 includes a rotary door 1 and a door frame 2.
It is installed between and. Reference numeral 12 in the figure denotes a self-closing device that accommodates a spring and the like.

That is, the damper device 3 is closed only when the door 1 is rotated in the closing direction by the one-way clutch 4 provided between the damper device 3 and the door frame 2 via the braking shaft 3F shown in FIG. Is designed to brake.

Further, the damper device 3 allows the damper force (or closing speed) when the door 1 is closed to be changed / fine-adjusted to a size (speed) desired by the user.
As shown in FIG. 2, of the rotary body 5 and the movable body 6, the upper surface side of the movable body 6 is formed in a tapered surface shape.

Further, in order to easily adjust the damper force, an adjusting screw (adjusting member) 3D screwed with the movable body 6 is engaged with the head so as to be rotated by a driver or the like. The groove 3E is formed. Further, the adjusting screw 3D is attached to the hole 3C provided on the lid 3B side of the main body 3A and the lid 3B constituting the housing of the damper device 3 in a rotation-free state (an immovable state in the vertical direction). ing.

The damper device 3 is provided with blades 7 and other mounting portions for mounting on the door 1 side. On the other hand, the portion of the blade 8 to which the one-way clutch 4 is attached is fixed to the door frame 2.

Although this damper device is formed of a substantially vertical type as a whole, the internal structure of the damper device is the same as that of the rotating body 5 and the movable body 6 described above. The fluid friction resistance type damper device for a door closer (filed on Sep. 27, 1994, Japanese Patent Laid-Open No. 6-257456), which has already been filed by the applicant, has the same structure, and therefore, it should be referred to.

Next, a second embodiment according to the present invention will be described. FIG. 3 is a perspective view of essential parts showing a damper device 30 applied to a seat cushion device according to a second embodiment of the present invention.

The damper device 30 includes a pedestal 90 on the floor 9.
The pinion 31A fixed to the braking shaft 31 of the damper device 30 is configured to mesh with the rack 91A fixed to the cushion frame 91 on the seat side. In addition, in this damper device 30,
The one-way clutch is not used because the damper function is generated when the cushion frame 91 performs the cushioning operation in either the up or down direction. However, when the cushion frame 91 is operated only in one direction, it is provided between the braking shaft and the pinion. The one-way clutch may be used. Further, in the damper device 30, the adjustment screw (adjustment member) 30A is provided from the side surface side.
The damper force can be adjusted by operating.

As shown in FIG. 4, unlike the first embodiment, the damper device 30 is of a type having a short dimension in the direction of the rotation axis, but its internal structure is the first. It is similar to the embodiment.

Further, the rotary body 50 and the movable body 60 (see FIG. 4) used in the damper device 30 are formed so that the facing sliding area gradually changes as in the case of the first embodiment. However, a shape that does not change is also possible. In this embodiment, between the floor 9 and the cushion frame 91, a plurality of shafts 90A each serving as a guide mechanism and a plurality of cylinders 91B into which the shafts 90A are fitted are fixed.

Therefore, according to this embodiment, even if a large vertical shock is applied to a seated person, it can be effectively absorbed by the damper force of the damper device 30. Moreover, in particular, according to the damper device 30, there is an effect that the damper force can be freely and easily changed and adjusted according to the preference of the user. Further, according to this embodiment,
A cushion device with high durability can be provided by utilizing the frictional resistance of viscous fluid, and it is also suitable for use in automobiles where the installation space is relatively limited, as it is small and can exhibit a relatively large damper force. Is.

Further, although the present embodiment is applied to a vehicle seat cushion device, the present invention is not limited to this, for example, as shown in FIG. 5, a device 10 such as various furniture and electric appliances. The damper device 11 can be attached to the hinge portion to which the door 10A is attached.

[0021]

As described above, according to the present invention, the movable member provided inside the housing is appropriately moved by the adjusting member, and the change of the position of the movable member causes the contact between the rotating member and the movable member. -The sliding area is changed, in other words, the damper force of the movable body with respect to the rotating body, and further the damper force and the opening / closing (rotation) speed of the rotating body, and eventually the doors and doors of various fields such as various devices and furniture. Can be easily fine-tuned.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a fluid friction resistance type damper device according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a fluid friction resistance type damper device applied to FIG.

FIG. 3 is a schematic perspective view showing a state in which a fluid friction resistance type damper device according to a second embodiment of the present invention is applied to a vehicle cushion device.

FIG. 4 is a cross-sectional view showing a fluid friction resistance type damper device applied to FIG.

FIG. 5 is a schematic perspective view showing a state in which the fluid friction resistance type damper device according to the present invention is applied to a door of furniture or the like.

[Explanation of symbols]

 1 Door 2 Vehicle Body 3 30 Damper Device 3F 31 Braking Shaft 4 One-Way Clutch 5 50 Rotating Body 6 60 Movable Body 3D 30A Adjusting Screw (Adjusting Member)

Claims (2)

[Claims] 1. A damper device for braking / absorbing motion motions and vibration motions of various mechanical devices, the fluid being filled in the housing of the device, and a movable body provided in the housing. A rotating body that slides / rotates between the movable body and the inner wall of the housing; a braking shaft that rotates integrally with the rotating body; and the movable body in a direction in which a contact area with the rotating body can be changed. A fluid friction resistance type damper device comprising: an adjusting member for moving the damper; and a damper force or a rotation speed of the braking shaft is changed / adjusted by the position displacement of the movable body. 2. The rotary body is formed so that the axial length of the rotary body is kept constant, and the axial length of the movable body is changed along the circumferential direction of the movable body. Adjust the damper force by changing the overlapping contact area with the body by rotating the adjusting member such as the adjusting rod.
The fluid frictional resistance damper device according to claim 1, wherein the fluid frictional resistance damper device is configured to be changed.