JPH03172482A - Rotary damper - Google Patents

Abstract

PURPOSE:To prevent collision and damage between a door and an opening frame by providing one shaft body with two outer cylinder bodies mutually disposed in the rotatably slidable state by a junction ring, as well as providing movable plates and fixed plates around the shaft body, and inserting these plates mutually around the shaft body. CONSTITUTION:A rotary damper 5 is formed of two outer cylinder bodies 6, 7, a shaft body 13, a one-way clutch 17, plural fixed plates 20a and movable plates 21a, a rotation control part 19, and the like, and the outer cylinder bodies 6, 7 are mutually disposed in the rotatably slidable state by a junction ring 12. The rotary damper 5 is then fitted at a door, and when the door is opened, the clutch 17 of the outer cylinder body 6 locks the shaft 13, so that the outer cylinder body 6 is rotated, as well as the shaft body 13 is rotated. With the rotation of the shaft body 13, the movable plates 21a of the outer cylinder body 7 locked at the shaft body 13 are also rotated simultaneously, whereas the fixed plates 20a held at the outer cylinder body 7 are immobile, and the movable plates 21a are rotated while sliding along the fixed plates 20a. Sudden action can be thereby suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotary damper used in a rotating body such as a door hinge for a building.

[Prior art and problems to be solved by the invention] Entrance doors and interior doors generally used in houses are
One side edge base in the vertical direction is supported by the opening frame by the hinge, and the other end is provided as a free end so as to be freely rotatable.

In addition, such revolving doors may use hinges with springs to bias them in the opening direction so that they close automatically without the need to place a hand on the open door. .

However, in such a case, the elastic force of the spring causes the door to close vigorously, so at the final point of the closing rotation, the door may collide with the opening frame, etc., making a loud impact noise, or the door may be damaged due to the impact. This may occur. Furthermore, even if a door is not equipped with a spring hinge, if an external force is applied to forcefully close the door, the door may still be damaged.

Therefore, in view of the above-mentioned conventional situation, the present invention prevents impact noise and damage when opening a door by controlling the opening speed of a rotating body such as a door by the action of a rotary damper. The purpose is to provide a rotary damper that can

[Means for Solving the Problems] In order to achieve the above object, the rotary damper of the present invention has [a fixed plate protrudingly formed along the longitudinal direction of the outer periphery, and the hollow part is connected and can be rotatably slidable. a first outer cylinder body and a second outer cylinder body disposed in series in close proximity to each other; The part that is loaded into the body and located inside the second outer cylinder is arranged and fixed in the shaft body whose outer peripheral surface is formed into a polygon, and in the hollow part of the first outer body, and is fixed to the shaft body. The one-way latch that is in contact with the circumference and the convex portion formed on the outer periphery fit into the engagement groove along the axial direction formed on the inner wall of the second outer cylindrical body, and are fixed immovably in the rotation direction. At the same time, the fixing plate is formed to have an inner diameter larger than the outer diameter of the shaft so that the hole provided in the center does not abut and engage with the shaft, and the outside diameter is the same as that of the second outer cylindrical body. a movable plate formed smaller than the inner diameter and having a protrusion or an inner circumferential edge in the center thereof that abuts at least one side of the outer circumference of the shaft body and engages in the rotational direction; and a plurality of fixed plates and a movable plate. and are alternately inserted around the shaft body so as to be brought into contact with each other, and a liquid of an appropriate viscosity is interposed between the contact surfaces.

[Function] The rotary damper of the present invention works as a pair with a spring hinge equipped with an elastic member that biases the door in the closing direction or with an ordinary hinge that does not have any special function. It is attached to the edge base and is used by supporting and fixing the door rotatably with respect to the opening frame.

First, in this case, when the door is opened, only the first foreign body rotates accordingly. next,
When opening the opened door, the one-way latch installed inside the first outer cylinder locks the shaft, so the shaft also rotates in conjunction with the rotation of the first outer cylinder. It will be done. Further, in this case, as the shaft body rotates, the movable plate inside the second outer cylindrical body, which is locked to the shaft body, also rotates at the same time.

Therefore, the movable plate slides and rotates between the fixed plates that are disposed closely facing each other, but since oil is present between each plate, the liquid shear resistance causes the movable plate to rotate. A braking force acts on the movable plate, reducing its rotational force.

As a result, the rotational speed of the shaft body and the first outer body that rotate in conjunction with each other becomes slow, and the door closes quietly and slowly.

[Example] Next, one embodiment of the present invention will be described based on the drawings.

FIG. 5 shows an embodiment in which the present invention is applied to an entrance door, an interior door, etc. used in a house. Zunawa, this door 1 has a rotating base supported by a fixed part 3 such as a door opening frame by a pair of hinges 4 and 4', and the other end is provided as a free end so that it can be rotated to open and close. There is. Note that 2 in the figure is a knob provided near the free end of the door 1.

In this embodiment, among the pair of hinges 4.4' described above, the hinge 4' attached to the upper side is a spring hinge, while the hinge 4 attached to the lower side is a hinge incorporating the rotary damper of the present invention. As a result, 114 were created. Hereinafter, the structure of the rotary damper of the present invention will be explained based on FIGS. 1 to 4.

In addition, FIG. 1 shows a longitudinal sectional view of the rotary gunpa, FIG. 2 shows a sectional view of the one-way clutch in FIG. 1 A-A, and FIG. 3 shows a sectional view taken along the line I-I in FIG. 1. Figure 4 is I of Figure 1.
A sectional view taken along the line T-1,1 is shown.

The rotary damper 5 of the present invention includes a rotation control section mainly consisting of a first outer cylindrical body 6, a second outer cylindrical body 7, a shaft body 13, a one-way clutch 17, a plurality of fixed plates 20a, and a movable plate 21a. Consists of 19. First outer cylindrical body 6
is a hollow cylindrical body with both ends open; one end is sealed with a lid member 8, and the other end is left open. Furthermore, a plate 10 is formed protruding along the longitudinal direction of the outer periphery for fixing to the door 1 on the first outer cylindrical body 6, and a rotating gunpa 5 is attached to the plate.
The second outer cylindrical body 7 is formed to have a substantially symmetrical structure with the first outer cylindrical body 6, and has holes 10a and 10b for fixing it to an immovable part 3 such as a door opening frame. It is a hollow cylindrical body with an open end, one end of which is sealed with a lid member 9, and the other end of which is left open.

Further, the second outer cylinder 7 has a protruding plate 11 for mounting in the same manner as the first outer cylinder, and the plate 11 has holes 11 for mounting.
1a and 1b are provided.

The first outer cylindrical body 6 and the second outer cylindrical body 7 have openings that are not sealed by the lid members 8 and 9 facing each other via a joining ring 12, and can rotate and slide in close contact with each other. It is located in

The shaft body 13 passes through the first outer body 6 and the second outer cylinder body 7 and is loaded into the hollow portion thereof, and is fixed at one end with a nut 14 and at the other end with a stopper 15. There is. Furthermore, an O-ring 16 for preventing oil leakage is interposed between the shaft body 13 and the inner surfaces of the outer cylindrical bodies 6 and 7. Note that the cross-sectional shape of the shaft body 13 is circular in the outer cylinder 6 and at the bearing portion of the outer cylinder 7, and is formed in a polygonal shape such as a square in the mounting portion of the movable plate 21a, which will be described later.

The one-way clutch 17 is interposed between the shaft body 13 and the hollow portion of the first outer cylinder body, and is held at a predetermined position by the spacer 18, the nut 14, and the inner wall surface of the tenth outer cylinder body 6. is maintained. In addition, one-way clutch 17
The facing surfaces of the spacer 18 and the spacer 18 are slidably disposed.

The directional clutch 17 includes a needle roller 17 that is in sliding contact with the shaft body 13, as shown in the cross-sectional view of FIG.
a, a roller receiving outer ring 17b having a groove for holding the roller 17a, and a spring 17c supported by the roller receiving outer ring 17b and urging the needle roller 17a against the shaft 13 from the bottom of the groove. The one-way clutch 17 having such a structure rotates in conjunction with the first outer cylindrical body 6 when the first outer cylindrical body 6 rotates in the A direction (that is, when the door is opened), but the one-way clutch 17 rotates in conjunction with the first outer cylindrical body 6; It spins without locking, and on the contrary,
When the first outer cylindrical body 6 rotates in the direction B (that is, when the door is closed), the needle roller 17a is locked to the shaft 13 by the elastic force of the spring L7c, and the first outer cylindrical body 6 is rotated. It acts to rotate the shaft body 13 by 1 2 along with the rotation of .

Note that during this operation, the spacer 18 does not rotate when the door is opened, but rotates together with the shaft 13 and the like when the door is opened.

A plurality of fixed plates 20a forming the rotation control section 19
The movable plate 21a has holes 20b and 21b in its center as shown in FIGS. 3 and 4, and each of these plates alternately has a polygonal outer peripheral surface I3. Further, each plate is pressed against each other by a spring receiver 22, a spring 23, and an end portion 24, and is held in the hollow portion of the second outer cylindrical body 7 in close contact with each other.

Here, the fixing plate 20a has a convex portion 20c provided on its outer periphery and an engagement groove formed in the inner wall of the second outer cylinder 7 along the axial direction as shown in FIG. 71 and is held in place, and the circumferential surface of the hole 20b is connected to the shaft body 1.
The inner diameter is such that it does not come into contact with the outer peripheral surface of No. 3. On the other hand, the movable plate 21a has its cavity 2 as shown in FIG.
By making the shape of 1b substantially match the cross-sectional shape of the shaft 3, the inner periphery of the hole 21b comes into contact with the outer peripheral surface of the shaft 13 and engages with it in the rotational direction. .

Thus, when the shaft body 13 rotates, the movable plate 21a rotates accordingly. Also, fixed plate 2
A high viscosity liquid such as silicone oil is interposed between the sliding surface of the movable plate 21a and the movable plate 21a, and the hollow portion is hermetically filled. 25 is an oil inlet.

The rotation control unit 19 having such a configuration includes a movable plate 21a that rotates together with the shaft body 13, and an outer cylinder body 7.
The first outer cylindrical body 6 rotates in conjunction with the shaft body 13 and the one-way clutch 17 due to the shearing resistance of the oil interposed in the sliding contact surface with the fixed plate 20a that is immovably fixed to the fixed plate 20a. Control can be performed to reduce the rotational force, that is, to slow down the closing speed of the door.

Therefore, due to the functions of the fixed plate 20a and the movable plate 21a, the number of the fixed plate 20a and the movable plate 21a, the viscosity of the filling liquid, the strength of the spring 23, etc. can be adjusted as appropriate to prevent the door from opening. The opening speed can be adjusted freely. Further, as described above, the fixed plate 20a and the movable plate 21a are simply inserted from the ends of the polygonal part of the shaft body 13 alternately, and then pressed and held by the spring 23 etc., so that the assembly work is easy. It is easy to attach and detach.

The rotary damper of the present invention operates as follows.

First, the fixing plate 10 of the first outer cylindrical body 6 is attached and fixed to the door, and the fixing plate 11 of the second outer cylindrical body 7 is attached and fixed to the immovable part 3.

Next, when opening the door, the first outer cylinder 6 and one-way clutch 17 rotate together with the door. In this case, the one-sided clutch 17 idles on the circumferential surface of the shaft body 13 and is not locked, and the shaft body 13 and the spacer 18 do not rotate. When the door is opened again after being opened, the one-way clutch 17 that rotates with the rotation of the first outer cylindrical body 6 engages the shaft body 1.
3, the first outer cylindrical body 6 and the shaft body 5 G 13 rotate together. In this case, spacer 1
8 and nut 14 also rotate at the same time. In this way, the shaft body 1
As a result of the rotation of the shaft body 13, the movable plate 21a that is inserted and engaged therewith also rotates together with the shaft body 13.

On the other hand, the fixed plate 2 held by the second outer cylindrical body 7
0a does not rotate and remains stationary. As a result, the movable plate 2
1a rotates while sliding between it and the fixed plate 20a, but the rotational force of the movable plate 21a is attenuated by the shear resistance of the high viscosity oil interposed between both plates, and the speed becomes slow. Become. Therefore, the rotational force of the shaft body 13 and the first outer cylinder body 6 that rotate in conjunction with the movable plate 21a is also reduced, and the speed becomes slow.

[Effects of the Invention] The rotary damper of the present invention can reduce the rotational torque of the rotary body when opening a door, etc., and can freely control the speed, so the rotational damper of the present invention can reduce the rotational torque of the rotating body when opening a door, etc., and can freely control the speed, so the rotational damper can reduce the amount of friction between the door and the opening frame when closing the door. It is possible to prevent impact noise caused by a rotating body such as a collision and damage to a rotating body such as a door due to a collision.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the rotary damper of the present invention, FIG. 2 is a sectional view of a one-sided clutch taken along the line A-A in FIG. 4 is a sectional view taken along the line II-IT in FIG. 1, and FIG. 5 is a usage state diagram when the rotary damper is applied to a door hinge. (6)...First outer cylindrical body, (7)...Second outer cylindrical body, (13)...Shaft body, (17)...・One-way clutch, (20al ・
...Fixed plate, (21al) ...Movable plate, Patent applicant: Fujisei Seiki Co., Ltd. Patent applicant: Three-phase needle bearing Co., Ltd.

Claims (1)

[Claims] A fixed plate protrudes along the longitudinal direction of the outer periphery. The hollow part is made to communicate with the rotary slide. a first movably arranged in series; an outer cylinder and a second outer cylinder; Penetrating the first outer cylinder and the second outer cylinder and loaded in the longitudinal center of the hollow part. and a portion located within the second outer cylindrical body. is a shaft body formed into a polygonal outer peripheral surface, arranged and fixed in the hollow part of the first outer cylindrical body; At the same time, one side is attached to the circumference of the above shaft body. the opposite clutch, The convex portion formed on the outer periphery of the second outer cylindrical body Fits into the engagement groove along the axial direction formed on the inner wall. and fixed immovably in the direction of rotation. In both cases, the hole provided in the center touches the shaft. The outer diameter of the above shaft body is larger than that to avoid contact. a fixing plate formed on the inner diameter; The outer diameter is smaller than the inner diameter of the second outer cylinder. At the same time, there is a shaft outside the shaft in the center. In contact with at least one side of the circumference and in the direction of rotation A movable plate having an engaging protrusion or inner peripheral edge. rate and It consists of multiple fixed plates and movable plates. Alternately insert the rate and the shaft around the shaft body. In addition, the contact surface has an appropriate Characterized by the presence of a liquid with a moderate viscosity. rotary damper.