JP4016148B2 - Closure shock absorber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention uses a rotary damper in which the resistance generated when rotating the rotating shaft in one direction and the resistance generated when rotating the rotating shaft in the other direction are different from each other so that an opening closing body such as a door is not suddenly closed. The present invention relates to a closing shock absorber.
[0002]
In this specification, the circular shape includes a fan shape.
[0003]
[Prior art]
Conventionally, there are various rotary dampers. For example, Japanese Utility Model Publication No. 52-65955 discloses the following rotary dampers.
[0004]
The inside of the main body of the rotary damper is divided into two upper and lower circular chambers, a power storage mechanism is provided in one room, a braking mechanism is provided in the other room, and a drive shaft passes through the central part. . An inner end of a spiral spring whose one end is fixed in one chamber is fixed to one end of the drive shaft, and a wing piston extending radially outward is fixed to the other end of the drive shaft. . Furthermore, a pressure medium such as oil clay having appropriate lubricity and fluidity is sealed in the other chamber.
[0005]
In the above rotary damper, the force when the door is opened is accumulated in the spiral spring, and the opened door is closed by this accumulated force, and when the door is closed, the pressure medium flows by the wing piston. Therefore, a resistance force against the rotation of the drive shaft of the damper is generated, so that the door does not close suddenly.
[0006]
[Problems to be solved by the invention]
The above-described conventional damper has a problem that the number of parts for constituting the power storage mechanism and the braking mechanism is large, and the rotary damper becomes expensive. Further, in the case of the closing shock absorber using the rotary damper, the door is closed by the force accumulated in the spring, so that there is a problem that the door cannot be kept open.
[0007]
An object of the present invention is to provide a closed shock absorber using a rotary damper that has a small number of parts and is inexpensive. It is another object of the present invention to provide a closing shock absorber that can hold the door in an open state and does not suddenly close when the door is closed.
[0008]
[Means for Solving the Problems]
A rotary damper used in a closing shock absorber according to the present invention includes a casing having a circular cross-sectional body having a closed lower end and an open upper end and a lid that closes the opening, and is accommodated coaxially with the body in the casing. A plurality of viscous fluid filling chambers formed in the casing, the cylindrical rotating body, and a rotating shaft that is provided at the center of the rotating body, protrudes from the casing through the casing, and rotates integrally with the rotating body. A rotary damper in which the resistance force is changed by changing the cross-sectional area of the flow path when the viscous fluid moves back and forth,
The fuselage is fixedly provided with a fixed partition that protrudes inward from the inner peripheral surface of the fuselage and the tip is in sliding contact with the outer peripheral surface of the rotary body. The rotary body is radially outward from the outer peripheral surface of the rotary body. A rotating partition that protrudes toward the surface is formed, and the space surrounded by the inner surface of the fuselage, the outer peripheral surface of the rotating body, the fixed partition, the rotating partition, and the lid is a viscous fluid filling chamber,
The fixed partition is formed with a communication path that connects the filling chambers partitioned by the fixed partition, and a vertical groove extending from the upper end to the lower end of the front end surface is formed on the front end surface of the rotary partition, and the vertical groove is radially The movable body is fitted from one side edge, and at least one of the rotary partition body or the movable body is provided with a holding means for maintaining a predetermined interval between the vertical groove bottom wall surface and the movable body one side edge, A space surrounded by one side edge of the longitudinal groove and the radially movable body is a fluid inflow space, and a flow path in which the fluid filling chamber and the fluid inflow space are connected to one side wall forming the longitudinal groove of the rotating partition. As the rotating body rotates in one direction, the viscous fluid in the fluid filling chamber flows into the fluid inflow space through the flow path, pushes the radially movable body outward in the radial direction, and the circumferential surface of the body By moving the other side edge of the movable body The partitioned filling chamber is cut off from each other, or the cross-sectional area of the communication path connecting both filling chambers is reduced, and the viscous fluid in the fluid inflow space flows out to the filling chamber through the flow path as the rotor rotates in the other direction. Then, pulling the radially movable body inward in the radial direction and separating the other side edge of the movable body from the circumferential surface of the body, the circumferential surface of the body and the other side edge of the movable body are separated between the filling chambers partitioned by the rotating partition. A new communication passage is formed between the two or the filling chambers, or the cross-sectional area of the communication passage formed in advance between the two filling chambers is increased.
[0009]
Further, the closing shock absorber of the present invention comprises a shock absorber main body fixed to one of an opening closing body such as a door or an opening edge and an engaging member fixed to the other. And a rotating arm fixed to the rotating shaft of the rotary damper, the rotating arm is provided with a guide portion that engages with the engaging member and is guided by the engaging member. In the fully closed state of the opening closed body in which the guide portion of the rotating arm and the engaging member are separated from each other, the rotating arm is held in a predetermined state, and the opening closed body is in the half-open state in which the guiding portion of the rotating arm and the engaging member are engaged. An urging means for urging the opening closing body in a closing direction is provided. The door is closed by the urging means, and the rotating arm rotates to rotate the rotation shaft of the rotary damper, whereby the closing speed of the opening closing body is increased. I will slow down It is what is.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0011]
1 and 2 are cross-sectional views of a rotary damper used in the closing shock absorber of the present invention, and FIG. 3 is an exploded perspective view of the closing shock absorber of the present invention .
[0012]
The rotary damper (1) of the present invention includes a cylindrical body (2) whose lower end is closed and whose upper end is open, and a cylindrical rotating body which is accommodated coaxially with the body (2) in the body (2). (3), a lid (5) in which the upper end opening of the body (2) is closed, and a rotating shaft (6) fixed to the rotating body (3) and having an upper end protruding from the lid (5), The casing consisting of the body (2) and lid (5) is partitioned into four viscous fluid filling chambers (A) and (B), and each filling chamber (A) and (B) is filled with viscous fluid. Has been. Although the lid (5) and the body (2) are not shown, they are fixed to each other by four screws.
[0013]
Hereinafter, the members forming the four filling chambers (A) and (B) will be described in detail.
[0014]
The fuselage (2) The upper end height and the rotating body (3) housed in the fuselage (2) are positioned on the same horizontal plane, and as shown in FIG. 4, the fuselage (2) The two fixed partitions projecting inward from the inner peripheral surface of the fuselage (2) from the upper end to the lower end of the fuselage (2), and the tip of which is in sliding contact with the outer peripheral surface of the rotary body (3) and facing each other It has a body (10). On the other hand, as shown in FIG. 5, the rotating body (3) has a radius from the outer peripheral surface of the rotating body (3) at an angle of 180 degrees in the circumferential direction from the upper end to the lower end of the outer periphery of the rotating body (3). It is equipped with two vertical thick plate-like rotating partitions (14) protruding outward in the direction, both partitions (10) (14), fuselage (2) inner surface, rotating body (3) outer peripheral surface The space surrounded by the lower surface of the lid (5) is a viscous fluid filling chamber (A) (B). Thus, in this embodiment, four viscous fluid filling chambers (A) and (B) are formed.
[0015]
The rotating shaft (6) has a short cylindrical portion (6a) at the lower end, a first prismatic portion (6b) connected to the short cylindrical portion (6a), and a long cylindrical shape connected to the first prismatic portion (6b). Part (6c) and the second prismatic part (6d) connected to the long cylindrical part (6c), the short cylindrical part (6a) at the lower end was formed at the center of the lower end surface of the fuselage (2) The first prismatic part (6b) is inserted into the circular hole in cross section and passes through the square through hole (3a) formed in the center of the rotating body (3), and the rotating shaft (6) And the rotating body (3) rotate together. Although not shown, a washer and a retaining ring are fitted around the short cylindrical portion (6a).
[0016]
The lid (5) includes a disk-like part (5a). A circular through hole is formed in the center of the disk-like part (5a), and a cylindrical part (5b) protruding upward is formed around the through hole. A long columnar portion (6d) of the rotating shaft (6) is located in the cylindrical portion (5b), and the second prismatic portion (6d) at the upper end of the rotating shaft (6) is removed from the lid (5). Projects upward. Although not shown, an O-ring and a cylindrical bearing are arranged around the long cylindrical portion (6c). The upper surface of the lid (5) is formed with two large and small protrusions (5c) and (5d) protruding upward. The large protrusion (5c) has a screw hole (5e) and a through hole. One through screw hole (5g) is formed in each of the small protrusions (5d) and the screw holes (5f). A hexagonal screw (7) is screwed into the screw hole (5e). As will be described in detail later, when this rotary damper (1) is used as a closing shock absorber, the rotating arm of the closing shock absorber is It comes into contact with the screw (7) and stops. Although not shown, the lid (5) is formed with vertical through screw holes at appropriate locations. The screw hole is normally closed by screwing in the screw hole, and when necessary, the screw is removed and the viscous fluid is inserted into the rotary damper (1) from the screw hole.
[0017]
A first communication path (R1) comprising a groove extending in the circumferential direction is formed on the upper surface of each fixed partition (10), and is partitioned by the fixed partition (10) by the first communication path (R1). The viscous fluid filling chambers (A) and (B) are connected to each other. In the center of each first communication path (R1), a bottomed hole (12) in the vertical direction having a diameter larger than the width of the first communication path (R1) is formed. The bottomed holes (12) communicate with the through screw holes (5f) (5g) of the lid (5), respectively. Then, by changing the screwing amount of the screw (13) screwed into the through screw hole (5f) (5g), it protrudes from the bottom surface of the disk-shaped part (5a) and enters the bottomed hole (12). The resistance generated when the rotating body (3) rotates can be adjusted by changing the length of the screw (13) protruding to adjust the flow path cross-sectional area of the first communication path (R1). .
[0018]
As shown in FIG. 5, a vertical groove (14a) extending from the upper end to the lower end is formed at the tip of each rotary partition (14). A vertical plate-like radial movable body (15) is fitted in the longitudinal groove (14a). Cutouts (holding means) (15a) are formed in the upper and lower portions of the radially inner end of the movable body (15), respectively. When the movable body (15) moves inward in the radial direction, the radially inner end surface of the movable body (15) comes into contact with the bottom wall surface of the longitudinal groove (14a) and enters the notch (15a) inward in the radial direction. A predetermined gap is provided between the side end surface and the vertical groove (14a) and the bottom wall surface, and it is surrounded by the lower notch (15a), the vertical groove (14a), and the fuselage (2) upper surface of the lower wall. The space surrounded by the upper space and the upper notch (15a), the longitudinal groove (14a), and the lower surface of the lid (5) is a fluid inflow space (S). In addition, among the side walls of the rotary partition (14) forming the vertical groove (14a), when the rotary partition (14) rotates counterclockwise, fluid is placed on the upper and lower sides of the side wall located on the front side in the rotational direction. A notch (flow path) (14b) connecting the inflow space (S) and the viscous fluid filling chamber (B) is formed. In the following description, the two viscous fluid filling chambers not connected to the fluid inflow space (S) are defined as the first filling chamber (A), and the two viscous fluid filling chambers connected to the fluid inflow space (S) are defined as the second. The filling chamber (B).
[0019]
In the rotary damper (1) configured as described above, for example, as shown in FIG. 1, when a clockwise force is applied to the rotating shaft (6), the rotating body (3) rotates clockwise. When the pressure in the second filling chamber (B) decreases, the viscous fluid in the fluid inflow space (S) flows into the second filling chamber (B) through the notch (14b) of the rotating partition (14). Then, the volume of the viscous fluid in the fluid inflow space (S) decreases and the movable body (15) is pulled inward in the radial direction, so that the distance between the distal end surface of the movable body (15) and the inner peripheral surface of the fuselage (2) A second communication passage (R2) is formed, and the second filling chamber (B) and the first filling chamber (A) partitioned by the rotating partition (14) are connected. Thus, when the rotating body (3) rotates clockwise, the second filling chamber (B) and the first filling chamber (A) partitioned by the rotating partition (14) are connected to the second communication path (R2). Since the second filling chamber (B) and the first filling chamber (A) connected by the fixed partition (10) are connected by the first communication path (R1), the rotating body (3) rotates. The resistance generated in the process is reduced.
[0020]
As shown in FIG. 2, when a counterclockwise force is applied to the rotating shaft (6) and the rotating body (3) rotates counterclockwise, the pressure in the fluid inflow space (S) decreases and the second The viscous fluid in the filling chamber (B) flows into the fluid inflow space (S) through the notch (14b) of the rotating partition (14), and the volume of the viscous fluid in the fluid inflow space (S) increases. The movable body (15) is pushed outward in the radial direction so that the distal end surface of the movable body (15) and the inner peripheral surface of the body (2) come into contact with each other and are partitioned by the rotary partition (14) ( B) and the first filling chamber (A) are shut off. Thus, when the rotating body (3) rotates counterclockwise, the second filling chamber (B) and the first filling chamber (A) partitioned by the rotating partition (14) are shut off, and the fixed partition Since the second filling chamber (B) and the first filling chamber (A) partitioned by (10) are only connected by the first communication path (R1), this occurs when the rotating body (3) rotates. Resistance increases.
[0021]
When no force is applied to the rotating shaft (6), the rotating body (3) is immediately stopped by the viscous force of the viscous fluid, and the rotating body (3) is kept stopped.
[0022]
In the rotary damper (1) of the above embodiment, the first communication path (R1) is configured by a groove formed along the circumferential direction formed in the fixed partition (10). 10) The gap between the tip surface and the rotating body (3) outer peripheral surface may be the first communication path.
[0023]
Further, as shown in FIG. 6, protrusions (holding means) (16a) projecting radially inward are formed at the upper and lower portions of the radially inner end of the movable body (16). The space surrounded by the lower surface of the upper protrusion (16a), the vertical groove (17a) of the rotating partition (17) and the upper surface of the lower protrusion (16a) is the fluid inflow space (S), and the vertical groove (17a When a through hole (flow path) (17b) connecting the fluid inflow space (S) and the viscous fluid filling chamber (B) is formed at the center of one side wall of the rotating partition (17) with There is.
[0024]
Even in the rotary damper provided with the movable body (16) and the rotary partition (17), when the rotary body (3) rotates clockwise, the viscous fluid in the fluid inflow space (S) is changed to the rotary partition ( 17) flows through the second filling chamber (B) through the through hole (17b), and a gap is formed between the front end surface of the movable body (16) and the inner peripheral surface of the body (2). R2) is formed.
[0025]
When the rotating body (3) rotates counterclockwise, the viscous fluid in the second filling chamber (B) flows into the fluid inflow space (S) through the through hole (17b) of the rotating partition (17). The second filling chamber (B) and the first filling chamber (A), which are partitioned by the rotating partition (17) when the tip of the movable body (16) and the inner peripheral surface of the body (2) come into contact with each other, are shut off. The
[0026]
Further, a projecting portion (holding means) projecting in the circumferential direction is formed at the radially outer end of the movable body, and a gap is formed between the radially inner end surface of the movable body and the vertical groove bottom wall surface. In addition, the protrusion (holding means) projecting radially outward from the vertical groove bottom wall surface may allow a gap between the radially inner end surface of the movable body and the vertical groove bottom wall surface. May be.
[0027]
When the fuselage is manufactured by die-casting and the fuselage has a truncated cone shape, the height of the movable body is made lower than that of the rotary body so that the movable body moves not only in the radial direction but also in the vertical direction. If obtained, it is possible to eliminate the need to incline the radially outer edge of the movable body in accordance with the inclination of the inner peripheral surface of the trunk. In this case, the viscous fluid filling chamber partitioned by the rotating partition is not completely cut off even when the movable body comes into contact with the circumferential surface of the fuselage, and is not separated by a slight gap (communication path). The cross-sectional area of the gap changes due to the movement of the movable body, and the resistance when the rotating body rotates changes.
[0028]
Next, a case where the closing shock absorber using the damper is applied to a door that rotates around a vertical axis to close and open an opening will be described with reference to FIGS. In the following description, front, rear, left, and right are based on FIG. 8, and the front side of FIG. 8 is the front, the back side is the rear, the left side is the left, and the right side is the right.
[0029]
The closing shock absorber of the present invention comprises a shock absorber main body (19) fixed to the upper right portion of the front surface of the door (opening closing body) (D) and an engaging member (20) fixed to the upper edge of the opening.
[0030]
The shock absorber main body (19) includes a plate-like vertical member (21) fixed to the front surface of the door (D), a plate-like horizontal member (22) protruding forward from the vertical member (21), and a horizontal member ( 22) at the left end of the rotary damper (1) fixed so that the rotary shaft (6) rotates about the vertical axis, and the plate-like base is the first of the rotary shaft (6) of the rotary damper (1). A horizontally extending rotary arm (23) fixed to the prismatic part (6d) and a base that is rotatably supported on the left side of the rotary arm (23) and extends to the right. (31) and an outer cylinder (32) whose base is rotatably supported by a shaft (24) provided on the horizontal member (22) and extends toward the left, The distal end portion of the body (31) is fitted into the distal end portion of the outer cylindrical body (32), and the inner rod body (31) and the outer cylindrical body (32) move in the axial direction relative to each other to move the inner rod body ( The length between the base portions of 31) and the outer cylinder (32) is changed. Furthermore, spring receivers (31a) and (32a) are respectively provided in the central portions of the lengths of the inner rod body (31) and the outer cylinder body (32), and between the spring receivers (31a) and (32a). A compression spring (33) is arranged.
[0031]
A rotation guide notch (guide portion) (23a) extending leftward from the tip is formed on the rotation arm (23), and the tip of the rotation arm (23) is bifurcated. A recess (23b) is formed in the left end edge of the rotary arm (23), and the head of the screw (7) is located in the recess (23b). In addition, a cylindrical elastic member (26) is attached to the front side of the rotary arm (23), so that the impact when the door (D) collides with the door opening edge due to a failure of the closing shock absorber or the like is mitigated. It is like that.
[0032]
The engaging member (20) includes a vertical plate portion (27) fixed to the opening edge, a horizontal plate portion (28) projecting forward from the lower end of the vertical plate portion (27), and a horizontal plate shape. An engaging roller (30) is provided at the front end of the portion (28) so as to protrude downward and to be rotatable about a vertical axis.
[0033]
Hereinafter, the operation of the above-described closing shock absorber will be described with reference to FIGS. In the following description, the clockwise direction and the counterclockwise direction are based on FIG.
[0034]
As shown in FIG. 9, when the door (D) is closed, the base of the inner rod (31) is the center of the rotating shaft (6) of the rotary damper (1) and the outer cylinder ( 32) is shifted to the door (D) side from the line connecting the rotation center of (32), and the spring (33) is a rotating arm so that the rotating shaft (6) of the damper (1) rotates counterclockwise. (23) is energized. In this state, the base part of the inner rod body (31) and the outer cylinder body (32) are separated by a predetermined distance, and the rotating arm (23) is in contact with the protruding part of the vertical member (21). (23) is prevented from rotating counterclockwise, and the rotating arm (23) is stopped. When the door (D) is opened from this state, as shown in FIG. 10, the rotating arm (23) is guided by the engaging roller (30) and rotated clockwise to rotate the rotating shaft of the rotary damper (1). (6) rotates clockwise. At the same time, the distance between the base portions of the inner rod body (31) and the outer cylinder body (32) is shortened, and the spring (33) is contracted. In this state, the base of the inner rod body (31) is a door (from the line connecting the center of the rotation shaft (6) of the rotary damper (1) and the rotation center of the outer cylinder (32)). D) At a position shifted to the side, the spring (33) biases the rotating arm (23) to rotate counterclockwise.
[0035]
Further, when the door (D) is opened, as shown in FIG. 11, the engagement roller (30) is separated from the rotation guide notch (23a) and the rotary damper (1) is rotated by a predetermined amount from the door closed state. Take. In this state, the base of the inner rod body (31) is the door (D) from the line connecting the center of the rotation shaft (6) of the rotary damper (1) and the rotation center of the outer cylinder (32). The spring (33) urges the rotary damper (1) to rotate clockwise, but on one side edge of the recess (23b) of the rotary arm (23). The screw (7) is in contact, and the damper (1) does not rotate clockwise, and the rotating arm (23) is kept rotated from the door closed state by a predetermined amount. This state does not change even if the door (D) is further opened as shown in FIG. As shown in FIG. 1, since the resistance generated when the rotating body (3) of the rotary damper (1) rotates clockwise is small, almost no force is required to rotate the damper (1). The force required to open the door (D) is almost the same as the force required to contract the spring (33) against the biasing force of the spring (33).
[0036]
Next, when the door (D) is closed from the state shown in FIG. 12, the engaging roller (30) is fitted into the rotation guide notch (23a) at the position shown in FIG. When the door (D) is further closed from this state, as shown in FIG. 10, the base of the inner rod body (31) is connected to the center of the rotating shaft (6) of the rotary damper (1) and the outer cylinder body ( 32) takes a position shifted from the line connecting the rotation center of the door to the door (D) side, the shrunk spring (33) extends, and the spring (33) extends without applying human power to the door (D). As a result, the rotating arm (23) is rotated counterclockwise, and the door (D) is closed as shown in FIG. When the door (D) is closed by the extension of the spring (33), the rotating body (3) of the rotary damper (1) rotates counterclockwise, and as shown in FIG. Since the resistance generated when 3) rotates counterclockwise is large, the closing speed of the door (D) is reduced, the door (D) does not close vigorously, and no unpleasant noise is generated.
[0037]
Further, since the rotary damper (1) does not rotate unless external force is applied, when the engagement roller (30) is away from the guide notch (23a), the door (D) It can be stopped at the position.
[0038]
The closing shock absorber of the present invention can also be applied to a sliding door. Hereinafter, the case where the closing shock absorber of the present invention is applied to a sliding door will be described with reference to FIG.
[0039]
The closing shock absorber of the present invention comprises a shock absorber main body (39) fixed to the upper edge of one end of the opening of the sliding door (E) and an engaging member (40) fixed to one upper end of the sliding door (E). .
[0040]
The shock absorber body (39) includes a horizontal plate portion (46) protruding from the upper edge of one end of the opening, a vertical plate portion (47) protruding downward from the horizontal plate portion, and a vertical plate shape. A rotary damper (1) that rotates about a horizontal axis fixed to the section (47), and a rotary arm (43) is attached to the rotary shaft (6) of the rotary damper (1). Further, the shock absorber main body (39) includes an inner rod body (41) whose base portion is rotatably supported by the base end portion of the rotating arm (43), and an outer portion whose base portion is rotatably supported by the vertical plate-like portion. A cylindrical body (42), the tip of the inner rod body (41) is fitted into the distal end of the outer cylinder body (42), and the inner rod body (41) and the outer cylinder body (42) are mutually connected. The distance between the base portions of the inner rod body (41) and the outer cylinder body (42) is changed by moving in the axial direction. Further, a spring receiver is provided at each of the central portions of the lengths of the inner rod body (41) and the outer cylinder body (42), and a compression spring (49) is disposed between the spring receivers.
[0041]
The engagement member (40) includes a plate-like portion (44) protruding obliquely upward from one upper end of the sliding door (E), and an engagement roller (attached to the tip of the plate-like portion and rotating about a horizontal axis ( 45).
[0042]
As the door (E) opens and closes in the closing shock absorber, the rotary arm (43) rotates.When the door is closed, the door (E) is closed by the spring (49) and the rotary damper (1 ) Reduces the door closing speed.
[0043]
Note that the closing shock absorber according to the present embodiment can be applied not only to a door but also to, for example, a hood of an automobile, a lid of a large hardware box, or the like.
[0044]
【The invention's effect】
According to the rotary damper used in the closed shock absorber of the present invention, the radially movable body is moved in the radial direction by the rotation of the rotating body, whereby the adjacent viscous fluid filling chambers are communicated or cut off. Since the resistance required for the rotation is changed, the number of parts constituting the rotary damper can be reduced, and the rotary damper becomes inexpensive.
[0045]
In addition, since this rotary damper does not rotate unless a force is applied from the outside, according to the closing shock absorber using this rotary damper, in the door open state where the engaging member and the guide portion are separated, The door can be fixed at an arbitrary position.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a rotary damper used in a closing shock absorber according to the present invention.
FIG. 2 is a transverse sectional view of another state of the damper.
FIG. 3 is an exploded perspective view of a closing shock absorber according to the present invention using the damper.
FIG. 4 is a perspective view of a body of the damper.
FIG. 5 is a perspective view of a rotating body of the damper.
FIG. 6 is a perspective view of another rotating body used in the damper.
FIG. 7 is a perspective view of the closing shock absorber of the present invention.
FIG. 8 is a side view of the closing shock absorber.
FIG. 9 is a plan view of the closing shock absorber when the door is closed.
FIG. 10 is a plan view showing a state where the door is opened in the closing shock absorber.
11 is a plan view showing a state where the door is further opened from the state shown in FIG. 10 in the closing shock absorber. FIG.
12 is a plan view showing a state in which the door is further opened from the state shown in FIG. 11 in the closing shock absorber. FIG.
FIG. 13 is a front view of another embodiment of the closing shock absorber of the present invention.
[Explanation of symbols]
(1) Rotary damper
(2) Torso
(3) Rotating body
(5) Lid
(10) Fixed partition
(14) (17) Rotating partition
(14a) (17a) Vertical groove
(14b) (17b) Flow path
(15) (16) Movable body
(15a) Holding means (notch)
(16a) Holding means (protrusion)
(19) (39) Shock absorber body
(20) (40) Engagement member
(23) (43) Rotating arm
(23a) Guide section
(A) (B) Viscous fluid filling chamber
(D) (E) Door (open closed body)
(R1) 1st passage
(R2) Second communication path
(S) Fluid inflow space

Claims (2)

It consists of a shock absorber main body fixed to one of an opening closing body such as a door or an opening edge, and an engaging member fixed to the other. The shock absorber main body is fixed to the rotary damper and the rotary shaft of the rotary damper. A rotary damper having a lower end closed and a casing having a circular cross section with an open upper end and a lid that closes the opening; A cylindrical rotating body, and a rotating shaft provided at the center of the rotating body and projecting from the casing and rotating integrally with the rotating body, and the viscous fluid flows back and forth through a plurality of viscous fluid filling chambers formed in the casing. resisting force by changing the cross-sectional area of Sai flow path being adapted to change the rotating arm, the guide portion to be guided is provided by the engagement member engaged with the engaging member, slow In the apparatus main body, in the fully closed state of the opening closed body in which the guide portion of the rotating arm and the engaging member are separated from each other, the opening is closed by holding the rotating arm in a predetermined state and engaging the guiding portion of the rotating arm and the engaging member. An urging means for urging in the direction of closing the opening closing body from the half-open state of the body is provided, and the opening closing body is closed by the urging means, and the rotating arm rotates to rotate the rotation shaft of the rotary damper to open the opening. A closing shock absorber in which the closing speed of the closing body is reduced. The fuselage is fixedly provided with a fixed partition that protrudes inward from the inner peripheral surface of the fuselage and the tip is in sliding contact with the outer peripheral surface of the rotary body. The rotary body is radially outward from the outer peripheral surface of the rotary body. A rotating partition that protrudes toward the surface is formed, and the space surrounded by the inner surface of the fuselage, the outer peripheral surface of the rotating body, the fixed partition, the rotating partition, and the lid is a viscous fluid filling chamber,
The fixed partition is formed with a communication path that connects the filling chambers partitioned by the fixed partition, and a vertical groove extending from the upper end to the lower end of the front end surface is formed on the front end surface of the rotary partition, and the vertical groove is radially The movable body is fitted from one side edge, and at least one of the rotary partition body or the movable body is provided with a holding means for maintaining a predetermined interval between the vertical groove bottom wall surface and the movable body one side edge, A space surrounded by one side edge of the longitudinal groove and the radially movable body is a fluid inflow space, and a flow path in which the fluid filling chamber and the fluid inflow space are connected to one side wall forming the longitudinal groove of the rotating partition. As the rotating body rotates in one direction, the viscous fluid in the fluid filling chamber flows into the fluid inflow space through the flow path, pushes the radially movable body outward in the radial direction, and the circumferential surface of the body The other side edge of the movable body in contact with the The viscous fluid in the fluid inflow space flows out into the filling chamber through the flow path, and pulls the radially movable body radially inward to separate the other edge of the movable body from the circumferential surface of the body. The closing shock absorber according to 1 .

Images