JP2001193347A - Rotary damper, overhang door braking device using rotary damper and overhang door provided with braking device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary damper capable of easily adjusting generated torque by finger without using jigs, a top-hinged swinging door braking device using the rotary damper and a top-hinged swinging door provided with the braking device. SOLUTION: A rotary member 5 is provided with a base section 6 pivotally supported on a drive shaft 4, a torque adjusting body 7 turnable in relation to the drive shaft 4 and having a cam member 72, a pair of slide members 8 arranged opposite to each other through the adjusting body 7, and a pair of spring means 9 for energizing the slide members 8 against the torque adjusting body 7. In the rotary member 5, the torque adjusting body 7 can be turned at a specified angle in relation to the drive shaft 4 by the adjusting knob 73 provided at the tip of the axially projected section of the cam member 72.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary damper capable of easily adjusting the torque generated by the rotary damper with a finger or the like without using a jig such as a driver, and further using the rotary damper. The present invention relates to a braking device for a sliding door which is opened and closed by sliding, and a hanging door provided with the braking device.

[0002]

2. Description of the Related Art Conventionally, a method of adjusting the generated torque of a rotary damper is disclosed in, for example, Japanese Patent Application Laid-Open No. 8-93312. In this publication, as shown in FIG. 12, a rotating drum 34 fixed to a braking shaft 33, an adjusting screw 35 screwed to a base 31A fixed to a lid 31B of a housing 31, and an adjusting screw 35 and the lid 3
A movable drum 36 movable along the groove 31C of 1B,
A fluid frictional resistance type damper device for a door closer including a one-way clutch 37 for transmitting a rotational operation in only one direction to a braking shaft 33 is disclosed.

In such a damper device, the movable drum 3
6 is moved along the axial direction within the housing 31 to change the contact / sliding area between the outer peripheral surface of the movable drum 36 and the inner peripheral surface of the rotary drum 34 to adjust the magnitude of the generated torque. It has become. Since such adjustment is performed by inserting and removing the adjustment screw 35, use of a jig such as a screwdriver is essential.

[0004]

SUMMARY OF THE INVENTION Therefore, a rotary damper which can be easily operated by a finger or the like without using a jig such as a driver to adjust the torque generated by the rotary damper, and a rotary damper using such a rotary damper. Suspended door braking device,
In addition, a hanging door provided with the braking device has been desired.

[0005]

According to a first aspect of the present invention, there is provided a rotary damper for solving the above-mentioned problems.
A housing having a chamber therein, a drive shaft having a base end housed in the chamber, a rotating member pivotally supported by the drive shaft and housed in the chamber, and a viscous fluid filled in the chamber. The rotating member includes a base portion rotatably supported integrally with the drive shaft, and a cam member rotatable relative to the drive shaft by the action of an external force equal to or greater than a predetermined value while having a fixed relationship with the drive shaft. A pair of slide members disposed opposite to each other so as to be movable in the radial direction via the torque adjuster, and each having an outer surface complementary to a part of an inner peripheral surface of the chamber; A pair of spring means for biasing the slide member of the torque adjustment member against the cam member of the torque adjustment member, and by rotating the torque adjustment member relative to the drive shaft by a predetermined angle, the pair of slide members Move the member radially along the base A rotating damper that changes the torque generated by the rotation of the rotating member by changing the radial distance between the outer surfaces of the pair of sliding members and the inner peripheral surface of the chamber by sliding the pair of sliding members. The cam member has an axial protrusion protruding out of the housing, and an adjustment knob as an operating part for rotating the torque adjusting body relative to the drive shaft by a predetermined angle, the tip of the protrusion. It was fixed to.

[0006] By sliding a pair of slide members in the radial direction along the base to control the radial distance formed between the outer surface and the inner peripheral surface of the chamber, the viscosity existing in the gap is controlled. Since the torque generated based on the shear resistance of the fluid can be changed, there is no restriction on the axial length of the damper body.
Further, the cam member has an axial projection protruding outside the housing, and an adjustment knob as an operating part for rotating the torque adjusting body relative to the drive shaft by a predetermined angle is provided on the projection of the cam member. I fixed it. Thereby, the torque adjusting body can be easily rotated to the position of the predetermined angle.

According to a second aspect of the present invention, the adjusting knob is provided with an annular knob main body mounted on a tip of an axial projection of the cam member, a screw hole penetrating along a radial direction of the main body, and a screw hole. The adjustment knob is fixed to the cam member by an end face of the screw being pressed against the outer surface of the projection.

According to a third aspect of the present invention, the cam member has a radial hole at the tip of the protrusion, and the adjustment knob has a pair of holes located on a line passing through the hole of the protrusion. An annular knob main body, and a press-fit pin inserted into a continuous hole formed of the hole of the protrusion and a pair of holes of the main body, and the adjustment knob is inserted by inserting the press-fit pin into the continuous hole. The cam member is fixed.

According to a fourth aspect of the present invention, the cam member has a groove formed along the circumferential direction on an outer peripheral surface near the tip of the projection, and the adjustment knob is provided so that the cam is located inward of the groove. A cam body which is attached to the protrusion of the member so as to be relatively non-rotatable, and a retaining ring which can be attached to the groove, and wherein the adjusting knob is attached to the groove by attaching the retaining ring to the cam member. It was fixed to.

[0010] By adopting the above construction, the adjustment knob can be easily and reliably fixed to the cam member.

[0011] Next, in order to solve the above-mentioned problems, a braking device for a sliding door according to a second aspect of the present invention is provided with a suspension door which is opened and closed by sliding on a guide rail. Claims 1 to 4 attached.
A one-way clutch attached to an extension of the drive shaft of the rotary damper out of the housing to permit rotation of the drive shaft in only one direction; A pinion fixed to the outer periphery of the directional clutch,
A rack is provided at a predetermined position substantially on a line parallel to the guide rail and meshes with the pinion.

With this configuration, when closing the hanging door, the door can be closed with a desired braking force using a compact damper having a short axial length, and the hanging door is opened. In this case, the door can be opened without receiving a braking force by the action of the one-way clutch.

According to a sixth aspect of the present invention, there is provided a suspension door including the braking device according to the fifth aspect, a main body, running wheels provided on the main body, The vehicle comprises the guide rail on which a traveling wheel is rotatably mounted, and the guide rail is inclined downward to a side where the main body is closed.

Further, such a hanging door is provided with a braking device according to claim 5 as described in claim 7,
A main body, a traveling wheel provided on the main body, a guide rail on which the traveling wheel is rotatably mounted, a traction mechanism for retracting the main body to a side where the main body closes, the main body and the traction mechanism, And a wire stretched between them.

According to a sixth aspect of the present invention, the guide rail can be inclined downward to the side where the main body of the hanging door closes to provide a hanging door having a self-closing mechanism.
By providing a pulling mechanism for pulling the main body of the hanging door on the side where the main body closes, the hanging door main body can be closed.

According to another aspect of the present invention, the traction mechanism fixed to a fixing member such as a wall disposed on the closing side of the main body and provided with a mainspring is provided, and the traction mechanism is provided between the mainspring and the main body. Wires were stretched.
When the main body moves to the closing side, the wire is drawn into the traction mechanism by the mainspring, so that the main body can be easily moved in the closing direction.

In a ninth aspect, a pulling mechanism fixed to a pulley fixed to a fixing member such as a wall disposed on the side to close the main body and a weight constitute a traction mechanism, and the weight is hung on the wire via the pulley. I tried to lower it. When the body moves to the closing side, the wire is pulled by the weight, so that the body can be easily moved in the closing direction.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A rotary damper according to a first invention of the present invention will be described with reference to the attached drawings. 1 is an exploded perspective view of the rotary damper, FIG. 2 is a right side view, FIG. 3 is an internal explanatory view of FIG. 2 with a lid removed, and FIG. 4 is a sectional view taken along line AA of FIG.

As shown in FIGS. 1, 3 and 4, the rotary damper 1 of the present invention accommodates a base end 4a of a drive shaft 4 in a chamber 3 inside a housing 2, and the base end 4a The rotatable member 5 is rotatably supported, and the chamber 3 is filled with a viscous fluid 10 so that the rotatable member 5 can be rotated relative to the housing 2.

Here, the rotary member 5 has a substantially oval base 6 which is rotatably supported by inserting the base end 4a of the drive shaft 4 into the shaft hole 6a.
And a circular projection 6b provided on one surface of the base 6.
Torque adjusting body 7 attached to the
And a pair of tension spring means 9, 9 for urging the pair of slide members 8, 8 against the torque adjusting member 7 while being disposed at positions facing each other while contacting the pair. Consists of The torque adjusting member 7 includes an inner adjusting ring 71 attached to the circular protrusion 6b,
It comprises an outer elliptical cam member 72 attached to and engaged with the outer periphery of the adjusting ring 71, and an adjusting knob 73.

A circular protrusion 6b is provided on one surface of the base 6, and two engagement protrusions (not shown) formed on the outer surface of the protrusion 6b are formed on the inner surface of the adjustment ring 71. The adjustment ring 71 is non-rotatably attached to the base 6 by engaging the two engagement recesses 71a, 71a, respectively.

The adjusting ring 71 and the cam member 72 are configured to engage with each other by a concave portion formed on one of the outer periphery of the adjusting ring and an inner peripheral portion of the center hole of the cam member and a convex portion formed on the other. For example, as shown in FIG.
The outer surface of the cam member 72 is provided with two projections 71b, 71b extending along the axial direction, and the inner surface of the cam member 72 is provided with a plurality of projections 7 extending along the axial direction.
The structure in which 2a is formed is adopted. When the cam member 72 is rotated with respect to the drive shaft 4 via the adjustment ring 71, the projection 72 a of the cam member 72
And the projections 72a, 72
The convex portion 71b is engaged with the concave portion 72b between a.
With such a configuration, the torque adjuster can be reliably disposed at a predetermined angle with respect to the drive shaft. Instead of such a structure, a concave portion along the axial direction is provided on the outer surface of the adjusting ring 71, and a plurality of convex portions along the axial direction is formed on the inner surface of the cam member 72, and the rotation of the drive shaft is stopped. Accordingly, the protrusion on the inner surface of the cam member 72 may be engaged with the recess on the outer surface of the adjustment ring 71. With such a configuration, the torque adjuster can be reliably disposed at a predetermined angle with respect to the drive shaft.

As shown in FIG. 1 and FIG.
An adjustment knob 73 as an operating portion is fitted to the end of the shaft 72c. The adjustment knob 73 includes a ring-shaped main body, a screw hole 73b extending along the radial direction of the main body, and a screw 73a screwed into the screw hole 73b.
By pressing the end surface of the screw 73a against the outer surface of the shaft 72c of the cam member 72 while screwing the
Is fixed to the cam member 72. Adjustment knob 73
By turning, the cam member 72 can be easily rotated with respect to the base 6.

As a method of fixing the adjustment knob 73 as the operating portion to the end of the shaft 72c of the cam member, for example, a method as shown in FIGS. In the example shown in FIG. 8, holes 73c, 73c are provided along the radial direction of the ring-shaped main body of the adjustment knob 73. 2
The three holes 73c are arranged at positions facing the center of the ring-shaped body, and the central axes of these two holes are aligned. On the other hand, the end of the shaft 72c of the cam member (axial projection)
Also, a hole 72f is provided. Two holes 73c and 72f
Shaft 72c of the cam member so that the central axes of the cam members are aligned.
The ring-shaped main body of the adjustment knob 73 is fitted to the end of the adjustment knob 73.
By inserting a press-fit pin 73d such as a wave spring into the two holes 73c and 72f, the adjustment knob 73 is fixed to the end of the cam member shaft 72c. As the press-fit pin, a Matsuba pin, a Dharma pin, or the like may be used instead of the wave spring.

In the example shown in FIG. 9, an end (axial projection) of the shaft 72c of the cam member has a cut surface 72 along the axial direction.
e, 72e are provided, and grooves 72g, 72g are provided along the circumferential direction on the peripheral surface of the uncut portion. On the other hand, the ring-shaped main body of the adjustment knob 73 has a shaft 72.
A hole 73e having a shape complementary to the end of c is provided. The end of the shaft 72c is fitted into the hole 73e so that the grooves 72g project outward from the hole 73e, and a retaining ring 73f is mounted in the grooves 72g. The adjustment knob 73 is in a detented state and in a detented state with respect to the cam member shaft 72c, whereby the adjustment knob 73 is fixed to the end of the cam member shaft 72c.

Each slide member 8 is attached to a sliding portion 8a that slides radially along the surface of the base portion 6 on the side where the circular protrusion 6b is provided, and to a radially outer end of the sliding portion 8a. And an outer wall 8b. The outer wall 8b has an outer surface 8c complementary in shape to the inner peripheral surface 3a of the chamber 3. Elongated holes 8d, 8d respectively corresponding to holes 6c, 6c formed at both ends in the longitudinal direction of the base 6 are provided in the sliding portions 8a, 8a of each slide member 8. By passing the holding pin 11 through the hole 6c and the long hole 8d, each slide member 8 can move radially in the chamber 3 within the clearance of the long hole 8d.

A pair of holes 8e, 8e are provided in the radially inner end of the sliding portion 8a of each slide member 8 near both ends thereof. Holes 8e, 8e of one sliding portion 8a
And holes 8e, 8e of the other sliding portion 8a facing these.
Are connected by tension spring means 9 and 9, respectively. The pair of slide members 8, 8 are urged by the tension of the tension spring means 9 so as to contact the cam member 72 of the torque adjusting body 7.

Next, the operation and the like of the rotary damper 1 configured as described above will be described. Such a rotary damper 1
Is used, for example, by fixing the housing 2 to a hanging door and engaging the other end 4b of the drive shaft 4 with a rack parallel to a guide rail of the hanging door via a pinion or the like.

When the suspension door is closed, the rotation of the suspension door is transmitted to the drive shaft 4 of the rotary damper 1, and the rotation member 5 rotates with the rotation of the drive shaft 4. Here, since a gap having a predetermined interval is formed between the outer surfaces 8c, 8c of the pair of slide members 8, 8 and the inner peripheral surface 3a of the chamber 3, the gap is formed by the rotation of the slide member 8. Existing viscous fluid 1
A rotational torque is generated by a shearing force acting on 0, thereby generating a torque by rotation as a braking force.

The drive shaft is fixed so as not to rotate,
By rotating the adjustment knob 73 to rotate the cam member 72 with respect to the drive shaft 4 to a predetermined angle, a desired rotation torque can be obtained.

That is, the protrusion 72 on the inner surface of the cam member 72
When a rotates one after another over the convex portion 71b on the outer surface of the adjustment ring 71, the outer surface of the cam member 72 moves the slide members 8, 8 apart from or close to each other in the radial direction while contacting the two slide members 8, 8. . Therefore, the slide member 8
The rotation of the cam member 72 is stopped where a gap formed between the outer surface 8c of the chamber 3 and the inner peripheral surface 3a of the chamber 3 provides a desired interval. Thus, by rotating the cam member 72 relative to the drive shaft 4 to a predetermined angle, the torque generated when the rotating member rotates can be set to a desired magnitude.

In the present rotary damper 1, the cam member 72 is stopped in a state where the convex portion 71b on the outer surface of the adjusting ring 71 is engaged with the concave portion 72b between the protrusions 72a on the inner surface of the cam member 72, so that the drive shaft 4, the cam member 72 of the torque adjusting member 7 can be reliably arranged at a predetermined angle.

Since the cam member 72 has an elliptical shape, the distance between the contact portions 12, 12 of the slide member 8 and the cam member 72 from the center of the cam member 72 (hereinafter referred to as "the cam member 72") with the rotation of the cam member 72. Center distance ") can be continuously varied. Therefore, the torque value generated by the rotation can be set as a continuous value, so that the fine adjustment of the braking force is possible.

To increase the generated torque, the cam member 7
By the rotation of 2, the center distance is increased from the initial one, and the interval of the gap formed between the outer surface 8c of the slide member 8 and the inner peripheral surface 3a of the chamber 3 is further reduced. Conversely, if the center distance is reduced from the initial distance, the outer surface 8
The gap formed between c and the inner peripheral surface 3a of the chamber 3 becomes wider, and as a result, the torque generated by rotation decreases.

When a high load is temporarily applied to a door or the like to which the rotary damper 1 is attached, the number of revolutions of the drive shaft 4 rapidly increases, and a sudden closing operation of the door or the like occurs. I do.
At this time, a large centrifugal force corresponding to the rotation speed of the drive shaft 4 acts on each slide member 8 temporarily. In the rotary damper 1 according to the present invention, since the tension force of the tension spring 9 is set to be smaller than the centrifugal force based on such a rapid closing operation, even if such a rapid closing operation occurs, Each slide member 8 is temporarily moved radially outward of the chamber 3 along the base 6 while being separated from the torque adjusting body 7 by a centrifugal force exceeding the tensile force of the extension spring 9 against the tension force. As a result, it is possible to generate an extremely high torque by temporarily further narrowing the interval between the outer surface 8c of each slide member 8 and the inner peripheral surface 3a of the chamber 3 in the radial direction. In this way, even if a temporary high load acts and a sudden closing operation occurs, a sufficient braking force capable of absorbing such a sudden operation can be applied immediately thereafter.

When the drive shaft 4 returns to the normal rotation speed by the action of the braking force, each slide member 8 is urged again by the tension spring 9 so as to come into contact with the torque adjusting member 7, and the normal setting is performed. Return to the state that generates torque.

As shown in FIG. 4, the other end 4b of the drive shaft 4
The slider 33, the housing 2, the O-ring 15, and the plate 17 are fitted in this order from the inside, and finally the bearing 18 is pivotally supported and protruded out of the housing, and is connected to, for example, a pinion (not shown). The other side (the right side in the figure) of the housing 2 is closed by the lid 13 while interposing an O-ring 14 and a bush 32 for preventing leakage of the viscous fluid 10 between the housing 2 and the cam member 72 of the torque adjusting body 7. . The O-ring 34 between the cam member 72 and the drive shaft 4, the O-ring 15 between the housing 2 and the drive shaft 4, and the O-ring 16 between the housing 2 and the lid 13 are also chambers. This is for preventing the viscous fluid 10 from leaking from the third.

The rotary damper 1 according to the first aspect of the present invention described above is a bidirectional damper that generates a braking torque regardless of the direction of rotation of the rotary member. As described in detail below, it is necessary to attach a pinion via a one-way clutch or the like to a drive shaft projecting from the housing to the outside so as not to generate a braking torque when opening the door, as described in detail below. .

Next, there is provided a sliding door brake device according to the second invention of the present invention, which utilizes the rotary damper described above, for sliding doors, and such a brake device according to the third invention of the third invention. An embodiment of the hanging door will be described with reference to the attached drawings. Such a suspension door braking device and a suspension door mainly include the rotary damper according to the first aspect described above, and are used by being attached to a suspension door that slides under its own weight and self-closes. 5 is a sectional view of a rotary damper for hanging door braking, FIG. 6 is a front view showing an example in which such a braking device is applied to a hanging door, and FIG. 7 is a side view of the same.

As shown in FIG. 5, a rotary damper 1 according to the present invention shown in FIGS. 1 to 4 is used for a suspension door braking device which closes while sliding. Here, housing 2
The end of the other end 4b of the drive shaft 4 protruding to the outside is supported by a shaft hole 20a of the one-way clutch 20, and the one-way clutch 20 is further supported by a shaft hole 21a of the pinion 21. . The one-way clutch 20 transmits the rotation of the pinion 21 to the rotation shaft 4 of the damper when the pinion 21 rotates in one direction, and transmits the rotation of the pinion 21 when the pinion 21 rotates in the other direction. It has a function of preventing transmission to the rotation shaft 4.

As shown in FIGS. 6 and 7, a bracket 23 is mounted at an arbitrary position on the upper part of the suspension door 22 which is closed while sliding by its own weight, and the housing 2 of the rotary damper 1 is mounted on the bracket 23. Fix the damper. Traveling wheels 24 each having a concave portion 24a extending in the circumferential direction are attached near both ends of the upper portion of the suspension door 22. Further, along the traveling portion of the suspension door 22,
A guide rail 25 having a raised ridge 25a at the top is stretched. The traveling wheel 24 travels on the guide rail 25 by the rotation of the concave portion 24a of the traveling wheel 24 on the ridge 25a of the guide rail 25. The guide rail 25 is inclined downward along the side on which the suspension door 22 closes so that the suspension door 22 can be closed by its own weight.

A rack 27 that meshes with the pinion 21 is provided between the guide rail 25 and the wall 26 to which the guide rail 25 is attached, on a line substantially parallel to the vicinity of the lower end of the guide rail 25.

Next, the operation and the like of the suspension door braking device 19 and the suspension door configured as described above will be described. FIG.
Shows a state where the hanging door 22 is opened. In this state, when the guide rail 25 pushes the suspension door 22 in the direction (X) in which the guide rail 25 is inclined downward, the concave portion 24 a of the traveling wheel 24 rotates on the convex ridge 25 a of the guide rail 25 and travels on the guide rail 25. While the guide rail 25
, The suspension door 22 moves in the X direction by its own weight.

When the hanging door 22 moves in this way and the pinion 21 starts engaging with the rack 27, the pinion 21 rotates clockwise in FIG. The one-way clutch (not shown) attached to the drive shaft 4 operates so as to transmit the rotation operation of the pinion 21 to the rotation shaft 4 of the damper when the pinion 21 rotates in this direction. During the meshing operation, the rotation of the pinion 21 is controlled by the rotation shaft 4 of the damper.
Is transmitted to

When the rotation of the pinion 21 is transmitted to the rotation shaft 4 of the damper, as shown in FIG.
Are arranged at a predetermined angle with respect to the drive shaft 4, while the drive shaft 4, the base 6, the torque adjuster 7, the pair of slide members 8, 8, and the rotating member 5 including the tension spring 9 are integrally formed. Rotate. Since the torque adjusting member 7 is arranged at a predetermined angle with respect to the drive shaft 4, a predetermined radial direction is provided between the outer surfaces 8c, 8c of the pair of slide members 8, 8 and the inner peripheral surface 3a of the chamber 3. A gap having an interval is formed. Accordingly, the rotation of the slide member 8 causes a shearing force to act on the viscous fluid 10 existing in the gap to generate a rotation torque. Therefore, during the meshing operation between the pinion 21 and the rack 27, the torque due to the rotation of the rotation member 5 is reduced. It can be generated as a braking force.

The braking force thus generated acts on the meshing operation between the pinion 21 and the rack 27, and as a result, the braking force acts on the movement of the suspension door. Therefore, when the pinion 21 starts to mesh with the rack 27, the sliding force of the suspension door is reduced and the suspension door can be closed slowly.

On the other hand, when the hanging door 22 is slid open from the closed state in this manner, the hanging rail 22 is tilted upward (Y).
Move to push up. When the pinion 21 is engaged with the rack 27 and rotates, the one-way clutch 20 attached to the drive shaft 4 does not transmit the rotation of the pinion 21 to the rotation shaft 4 of the damper. No braking force acts on it. Therefore, the suspension door 22 can be moved in the Y direction only by the force for pushing the suspension door 22 in the Y direction against the force acting in the X direction based on the own weight of the suspension door 22.

In the state where the hanging door 22 shown in FIG. 6 is opened, for example, when the hanging door 22 is accidentally pushed with a very large force in the X direction, the hanging door 22 suddenly moves in the X direction. Slide the pinion 21 to the rack 27
Engage with. In the initial stage of such engagement, a high load is temporarily applied to the pinion 21 to rotate the pinion 21 at high speed, and this rotation is transmitted to the rotating shaft 4 of the rotary damper 1.

However, a large centrifugal force acts on each slide member 8 of the rotary damper 1 in accordance with the number of rotations of the drive shaft 4, but the tensile force of the extension spring 9 is reduced by the centrifugal force based on such a rapid closing operation. Because it is set smaller,
Each slide member 8 is separated from the torque adjusting member 7 by a centrifugal force exceeding the tensile force of the tension spring 9 and exceeding the tension force. As a result, the gap in the radial direction formed between each outer surface 8c of each slide member 8 and the inner peripheral surface 3a of the chamber 3 can be temporarily further reduced to generate an extremely high torque, and the suspension door Braking force sufficient to absorb the temporary abrupt closing operation of the vehicle.

Further, in the above-described braking device using the hanging door that slides in the opening and closing direction, the hanging door is self-closed by providing a guide rail that is inclined downward on the side where the hanging door closes. However, instead of such a self-closing mechanism, the suspension door may be closed by adopting, for example, a traction mechanism as shown in FIGS.

In the example shown in FIG. 10, a rotary damper 1 and two running wheels 2
4, 24 are attached. A guide rail 25 is stretched over a traveling portion of the suspension door 22, and traveling wheels 24, 2
4 runs. A traction mechanism 85 in which a mainspring spring 84 is housed is mounted on the wall 83 to which one end of the guide rail 25 is mounted. Wall 8 above the hanging door
A wire 86 is stretched between the end on the third side and the mainspring 84 of the traction mechanism 85. When the hanging door 22 is pushed in the X direction, the mainspring spring 84 is wound up and the wire 86 is also pulled into the traction mechanism.
It moves in the direction and is closed. The suspension door 22 is opened by pulling the suspension door 22 in the Y direction against the tension of the mainspring spring 84.

Next, in the example shown in FIG. 11, a traction mechanism 89 including a pulley 87 and a weight 88 is used instead of the traction mechanism 85 in FIG. A wire 86 is stretched via a pulley 87 between the end of the upper part of the suspension door on the wall 83 side and the weight 88 of the traction mechanism 89. When the suspension door 22 is pushed in the X direction, the suspension door 22 moves in the X direction and is closed by the pressing force acting on the suspension door 22. The suspension door 22 is opened by pulling the suspension door 22 in the Y direction against the weight of the weight.

[0053]

According to the first aspect of the present invention, there is provided a rotary damper according to claim 1, wherein a housing having a chamber therein, a drive shaft having a base end housed in the chamber, and a drive shaft rotatably supported by the drive shaft. A rotating member housed therein, and a viscous fluid filled in the chamber, wherein the rotating member has a fixed relationship with the drive shaft, the base being rotatably supported integrally with the drive shaft. A torque adjusting member provided with a cam member which can be relatively rotated by the action of an external force greater than or equal to a predetermined value; A pair of slide members each having an outer surface complementary to the portion, and a pair of spring means for urging the pair of slide members against the cam member of the torque adjusting body, and Rotate the torque adjuster relative to the specified angle. By sliding the pair of slide members in the radial direction along the base to change the radial distance between the outer surface of the pair of slide members and the inner peripheral surface of the chamber, In a rotary damper configured to change a torque generated by rotation, the cam member has an axial protrusion protruding outside the housing, and rotates the torque adjuster relative to the drive shaft by a predetermined angle. An adjusting knob as an operating part for fixing is fixed to the tip of the protrusion.

By sliding the pair of slide members in the radial direction, the distance in the radial direction formed between the outer surface and the inner peripheral surface of the chamber is adjusted, and the distance is adjusted according to the distance of the viscous fluid existing in the gap. The torque generated based on the shearing resistance is obtained. Therefore, since the generated torque can be changed depending on the radial interval, the axial length of the damper body can be shortened, so that the damper must be attached to a place where the axial length is small. In such a case, the damper can be attached.

An adjusting knob as an operating portion for rotating the torque adjusting member relative to the drive shaft by a predetermined angle is fixed to the tip of an axial projection projecting from the housing of the cam member. This makes it possible to easily rotate the torque adjusting body to a position at a predetermined angle with respect to the drive shaft. Further, such an adjustment knob can be easily operated with a finger.

According to a second aspect of the present invention, the adjusting knob is provided with an annular knob main body mounted on the tip of the projection of the cam member, a screw hole penetrating along the radial direction of the main body, and a screw hole formed in the screw hole. And the end face of the screw is pressed against the outer surface of the projection to fix the screw to the shaft of the cam member.

According to a third aspect of the present invention, the cam member is provided with a hole along the radial direction at the tip of the projection, and the adjustment knob has a pair of holes located on a line passing through the hole of the projection. An annular knob main body, and a press-fit pin inserted into a continuous hole formed of the hole of the protrusion and a pair of holes of the main body, and the adjustment knob is inserted by inserting the press-fit pin into the continuous hole. The cam member is fixed.

According to a fourth aspect of the present invention, the cam member has a groove formed along the circumferential direction on the outer peripheral surface near the tip of the protrusion, and the adjustment knob is provided so that the cam is located inward of the groove. A cam body which is attached to the protrusion of the member so as to be relatively non-rotatable, and a retaining ring which can be attached to the groove, and wherein the adjusting knob is attached to the groove by attaching the retaining ring to the cam member. It was fixed to.

According to the above-described configuration, the adjustment knob can be easily and securely fixed to the cam member, and such an adjustment knob can be easily operated with a finger.

Next, according to a second aspect of the present invention, as set forth in the fifth aspect, any one of the first to fourth aspects is attached to a hanging door which is opened and closed by sliding on a guide rail. A one-way clutch attached to an extension of the drive shaft of the rotary damper out of the housing to permit rotation of the drive shaft in only one direction; and an outer periphery of the one-way clutch. And a rack provided at a predetermined position on a line substantially parallel to the guide rail and meshing with the pinion.

In the braking device having such a configuration, the door can be closed with a desired braking force by using a compact damper having a short axial length, and the door can be closed without receiving the braking force by the action of the one-way clutch. It has the advantage that it can be opened.

Further, by sliding the slide member of the rotary damper in the radial direction to adjust the radial interval formed between the outer surface thereof and the inner peripheral surface of the chamber, the generated torque is changed. Since the axial length of the damper body is not particularly limited, it can be shortened. Since the damper body is arranged so that its axial direction coincides with the wall and the guide rail in a direction substantially perpendicular to these, the distance between the wall and the guide rail can be reduced, and the damper can be braked. The device can be made compact.

Further, even when a high load is temporarily applied to the suspension door and the number of rotations of the drive shaft suddenly increases, the generated centrifugal force is set to be smaller than the tensile force of the spring means. There is an advantage that the braking force absorbing the temporary high load can be made to work.

According to a sixth aspect of the present invention, there is provided a hanging door including the braking device according to the fifth aspect, a main body, running wheels provided on the main body, and The braking device according to claim 5, comprising a guide rail on which a traveling wheel is rotatably mounted, wherein the guide rail is inclined downward to a side where the main body closes. Comprising a main body, a traveling wheel provided on the main body, a guide rail on which the traveling wheel is rotatably mounted, a traction mechanism for retracting the main body to a side on which the main body closes, A wire stretched between the traction mechanism and the traction mechanism may be provided.

In the hanging door according to the sixth aspect, a self-closing mechanism in which a guide rail is inclined downward is provided on the side where the main body of the hanging door is closed. In the hanging door according to the seventh aspect, the main body is mounted on the side where the main body is closed. Since the traction mechanism for traction is provided, each has an advantage that it can be easily moved in the direction in which the main body of the suspension door closes.

In the suspension door of the present invention, the traction mechanism provided with a mainspring is fixed to a fixing member such as a wall disposed on the side where the main body closes, and the traction mechanism is provided between the mainspring and the main body. The wire was stretched between them. The mainspring allows the wire to be pulled into the traction mechanism and can be easily moved to the side where the main body is closed.

In the suspension door of the ninth aspect, a pulling mechanism fixed to a pulley fixed to a fixed member such as a wall disposed on the side on which the main body closes and a weight constitute a pulling mechanism, and the wire is connected to the wire via the pulley. The weight was suspended. When moving to the side where the main body closes, the weight can easily move to the side where the main body closes as the wire is pulled.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a rotary damper according to the present invention.

FIG. 2 is a right side view of the rotary damper.

FIG. 3 is an internal explanatory view of FIG. 2 with a lid removed.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view of a rotary damper for braking a suspension door according to the present invention.

FIG. 6 is a front view showing an example in which the suspension door braking device according to the present invention is applied to opening and closing of a suspension door.

FIG. 7 is a side view showing an example in which the suspension door braking device according to the present invention is applied to opening and closing of a suspension door.

FIG. 8 is a perspective view showing a modified example of a method of attaching an adjustment knob to a torque adjustment body.

FIG. 9 is a perspective view showing a modified example of a method of attaching an adjustment knob to a torque adjustment body.

FIG. 10 is a side view showing an example in which the suspension door braking device according to the present invention is applied to opening and closing of a suspension door.

FIG. 11 is a side view showing an example in which the suspension door braking device according to the present invention is applied to opening and closing of a suspension door.

FIG. 12 is a sectional view showing a conventional liquid frictional resistance type damper device for a door closer.

[Explanation of symbols]

1. Rotary damper, 2. Housing, 3. Room, 3a
··· Inner peripheral surface, 4 ··· Drive shaft, 4a ··· Base end side, 5 ··· Rotating member, 6 ··· Base, 7 ··· Torque adjusting body, 8 ··· Slide member, 8c ··· Outer surface, 9 · · Spring means, 10 · · · viscous fluid, 19 · · · brake device for hanging door, 20 · · one-way clutch, 21 · · pinion, 22 · · · hanging door, 24 · · ·
Running wheels, 25 guide rails, 27 racks, 72
・ Cam member, 72f ・ ・ Hole, 72g ・ ・ Groove, 73 ・ ・ Adjustment knob, 73a ・ ・ Screw, 73b ・ ・ Screw hole, 73c
..Hole, 73d ··· Press-fit pin, 73f ·· Retaining ring, 83
..Fixing members, 84.Spring springs, 85,89 ..
Towing mechanism, 86 wire, 87 pulley, 88
weight.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16H 19/04 F16H 19/04 Z G05G 1/08 G05G 1/08 E

Claims (9)

[Claims] A housing having a chamber therein; a drive shaft having a base end housed in the chamber; a rotating member pivotally supported by the drive shaft and housed in the room; A viscous fluid, wherein the rotating member is rotatable relative to the drive shaft by the action of an external force equal to or greater than a predetermined value while having a fixed relationship with the drive shaft. A pair of slides each having a torque adjusting body provided with a cam member and an outer surface complementary to a part of an inner peripheral surface of the chamber, the slides being disposed so as to be movable diametrically through the torque adjusting body; And a pair of spring means for urging the pair of slide members against the cam member of the torque adjusting body, by rotating the torque adjusting body relative to the drive shaft by a predetermined angle. And the pair of slide members So that the torque generated by the rotation of the rotary member is changed by changing the radial distance between the outer surface of the pair of slide members and the inner peripheral surface of the chamber by sliding the pair of slide members in the radial direction. In the rotary damper, the cam member has an axial projection protruding outside the housing, and an adjustment knob as an operating part for rotating the torque adjusting body relative to the drive shaft by a predetermined angle. A rotary damper fixed to the tip of the projection. 2. An adjusting knob comprising: an annular knob main body mounted on a tip of the projection of the cam member; a screw hole along a radial direction of the main body; and a screw screwed into the screw hole. The adjustment knob is fixed to the cam member by pressing the end face of the screw against the outer surface of the protrusion.
The rotary damper according to claim 1. 3. An annular knob body having a pair of holes located on a line passing through the hole of the projection, wherein the cam member has a hole along the radial direction at the tip of the projection; A press-fit pin inserted into a continuous hole consisting of the hole of the protrusion and a pair of holes of the main body, and the adjustment knob is fixed to the cam member by inserting the press-fit pin into the continuous hole. The rotary damper according to claim 1. 4. The cam member includes a groove formed along a circumferential direction on an outer peripheral surface near a tip of the protrusion, and the adjustment knob is provided so that the protrusion of the cam member is inward of the groove. A knob body attached to the cam member so as to be relatively non-rotatable, and a retaining ring attachable to the groove, wherein the adjusting knob is fixed to the cam member by attaching the retaining ring to the groove. 2. The rotary damper according to 1. 5. The rotary damper according to claim 1, wherein the rotary damper is mounted on a hanging door that is opened and closed by sliding on a guide rail, and a drive shaft of the rotary damper is provided outside a housing. A one-way clutch attached to the extension of the one-way clutch to allow rotation in only one direction of the drive shaft, a pinion fixed to the outer periphery of the one-way clutch, and a predetermined line substantially parallel to the guide rail. A suspension device for a hanging door, comprising: a rack provided at a position and meshing with the pinion. 6. The guide rail comprising the braking device according to claim 5, comprising a main body, a traveling wheel provided on the main body, and the guide rail on which the traveling wheel is rotatably mounted. Is a hanging door inclined downward to a side where the main body closes. 7. A braking device according to claim 5, further comprising a main body, a traveling wheel provided on the main body, a guide rail on which the traveling wheel is rotatably mounted, and a side on which the main body is closed. A hanging door comprising: a pulling mechanism for pulling the main body; and a wire stretched between the main body and the pulling mechanism. 8. The traction mechanism is fixed to a fixing member such as a wall disposed on a side on which the main body closes, and further includes a mainspring therein, and the wire is stretched between the mainspring and the main body. The suspension door according to claim 7, wherein the wire is drawn into the traction mechanism by the mainspring when the main body moves to the closing side. 9. The pulling mechanism comprises a pulley fixed to a fixing member such as a wall disposed on a side on which the main body closes, and a weight, and the weight is suspended from the wire via the pulley. When the body moves to the closing side,
The wire is drawn by the weight,
The hanging door according to claim 7.