JP2010001680A - Opening/closing device of turning door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening/closing device of a turning door, which is equipped with a damper for easing an abrupt closing motion of the turning door, wherein the mechanism is manufactured in a very simple structure and positively operable over a long period. <P>SOLUTION: The opening/closing device is formed of a frame 5 mounted on one of a frame body B and a door A, and a pin 4 mounted on the other. The frame 5 is provided with a turnable arm 8 having a slot 7 formed therein, for disengageably engaging with the pin 4, and the arm 8 is turnable from a closed position in which the arm is stored in the frame to an open position in which the arm is protruded from the frame by a predetermined angle. The arm is reversibly energized between the closed position and the open position across a dead line as a boundary by a spring 12 stretched between an arm-side support point 10 and a frame-side support point 11. Further the opening/closing device comprises the damper 14 for easing the abrupt turning of the door when the arm is turned beyond the dead line toward the closed position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing device for a revolving door (swing door) that opens and closes with a hinge as a fulcrum.

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No. H10-228667 discloses a shock absorber such as a damper in order to alleviate a sudden closing movement of a rotating door in furniture or joinery.
In this patent document 1, particularly as shown in FIGS. 1 and 4 of the publication, the door (20), (21) of the arm (8) directly connected to the damper (12) is suddenly closed to the door ( When the pin (3) of 1) is engaged, the shock is reduced by the damper (12).
However, in this device, the operation of further biasing the door in the closing direction after the door pin (3) is engaged with the claw of the arm (8) is not clarified, so the door is biased to the closed position. It must be used in combination with a conventional hinge with a spring (for example, a slide hinge) or by pushing the door to the closed position by hand.

Therefore, in an opening / closing device provided with a shock absorber such as a damper that alleviates a sudden closing motion, for example, those shown in Patent Document 2 and Patent Document 3 are proposed as springs that bias the door in the closing direction. ing.
In Patent Document 2, when the door is closed and the roller (18) of the arm (17) is engaged with the guide long groove (19), the spring (7) in the cylinder (6) is actuated to gently close the door in the closing direction. The structure is energized.
Further, in Patent Document 3, when the door pin (7d1) is engaged with the long groove (15a) of the arm (12), the contact position of the slider (13) with respect to the protruding portion (12c) varies, and the spring is changed. The force of (14) acts in the door closing direction, and the door is gently closed in combination with the operation of the damper (9).
However, in the opening / closing device of Patent Document 2, a mechanism such as a rack provided on the inner wall of the piston and combining a pinion that meshes with the rack is very complicated and expensive, and the opening / closing device of Patent Document 3 is not practical. , The mechanism for accurately abutting the slider (13) on the coil spring (7) in the linear direction and accurately contacting the arm ridge (12c) increases the number of parts, and the entire device However, there is a problem that the size is increased and the cost is increased.
JP 2004-270352 A Japanese Utility Model Publication No. 56-65074 JP 2006-283460 A

  SUMMARY OF THE INVENTION Accordingly, it is a primary object of the present invention to provide an open / close device for a revolving door that solves the above-described problems with an extremely simple structure and that operates reliably over a long period of time.

  In order to achieve the above object, the present invention takes the following technical means. That is, in the opening / closing device for the rotating door according to the present invention, the opening / closing device for the rotating door for opening / closing the opening of the frame body, the frame of the opening / closing device attached to one of the frame body or the door, And a pivot arm provided with a long groove that is detachably engaged with the pin, the arm being provided at a predetermined angle from a closed position accommodated in the frame. It is formed so that it can rotate to the open position, and it is stretched between the support point on the arm side and the support point on the frame side. A damper is provided to relieve sudden rotation caused by the spring when the arm rotates toward the closed position beyond the deadline. And a configuration that is formed so as to engaged in the long groove of the arm waiting in pin open position in the closed process of the door.

  Here, the damper mentioned above refers to the resistance force of the fluid pressure in the cylinder (generally this resistance force) when the piston rod receives the external pressure to push the piston rod into the cylinder at the tip of the piston rod. This is called a “damping force”) and is gradually moved in the direction of pushing in the piston rod while attenuating the resistance force. When the external pressure is lost, the piston rod returns to the protruding position by a weak spring in the cylinder. Say.

  Since the present invention is configured as described above, in the process of closing the door, the pin is engaged with the long groove of the arm waiting in the open position, and the arm is rotated toward the closed position by the reverse biasing force of the spring. The door can be closed securely, and the damper can ease the sudden closing movement of the door by the spring and smoothly close the door, preventing the occurrence of vibration and impact sound due to impact, In particular, the arm closing position, opening position, and forcing are performed by the reverse biasing action of a single spring with the deadline as a boundary, so the structure is simple, the number of components is small, and the operation is inexpensive. Can be reliably performed over a long period of time and has an excellent effect that the product life is long.

  1 to 4 show an embodiment of an opening / closing device for a rotating door according to the present invention, and a door is denoted by reference numeral A. FIG. The door A is formed so as to open and close the opening 2 of the frame B by rotating about the hinge 1 as a fulcrum. A pin support plate 3 is extended on the back surface of the door A, and pins 4 protruding upward are provided on the pin support plate 3.

  Reference numeral 5 denotes a frame of the switchgear, which is attached to the lower surface of the ceiling wall 6 of the frame B with screws or the like. An arm 8 is attached to the frame 5 so as to be rotatable from a closed position housed in the frame 5 of FIG. 2 to an open position of FIG. Further, the arm 8 is formed so as to be reversely biased between a closed position and an open position by a spring 12 stretched between a support point 10 on the arm 8 side and a support point 11 on the frame 5 side. . That is, the support point 10 on the arm side of the spring 12 is formed so as to urge the spring 12 against the arm 8 in the closing direction and the opening direction with a deadline C connecting the frame side support point 11 and the pivot 9 as a boundary. Yes. The deadline C is preferably at an angle of about 40 degrees with respect to the closed position. Further, when the arm 8 is biased in the door direction beyond the deadline C, a stopper 13 is provided so as to stop at a position slightly beyond the deadline C. Further, when the door A closes in a posture in which the arm 8 is waiting at the open position, a long groove 7 having an opening at the front end is provided at the front end portion of the arm 8 so that the pin 4 of the door A is slidably engaged. It has been.

  In addition, a damper 14 is provided in order to alleviate a sudden rotation by the spring 12 when the arm 8 rotates toward the closed position beyond the deadline C. In this embodiment, a so-called air damper is used as the damper 14, and as shown in FIG. 4, a cylinder 15 fixed to the frame 5 and a piston slidably accommodated in the cylinder 15. 16, a piston rod 17 that protrudes outward from the piston 16 through the front end wall of the cylinder 15, a fluid that generates resistance to movement of the piston rod 17 in the cylinder 15, that is, air, and the resistance In order to dampen the pressure, a minute air passage 18 formed between the cylinder 15 and the piston 16 and a spring 19 that constantly urges the piston rod 17 in a projecting posture. The force of the spring 19 is set smaller than the biasing force of the spring 12 that rotates the arm 8 in the closed position direction.

  The tip of the piston rod 17 is formed so as to come into contact with the end face 20 of the arm 8 when the arm 5 rotates in the closed position direction and approaches the end of the closed position. As a result, the tip of the piston rod 17 is pressed against the end face of the arm 8, and the arm 8 is slowly rotated to the closed position by the spring 12 while the resistance force by the fluid in the cylinder is gradually attenuated. .

  In FIG. 1, the door A is in a half-open state with respect to the arm 8 in the closed position, but this FIG. 1 is drawn for convenience in understanding the structure. 4 is engaged with the long groove 7 of the arm 8 in the closed position, and the door A is closed.

  FIG. 2 shows the closing process of the door A, and the arm 8 is waiting in the open position. When the door A is further operated by hand in the closing direction from this posture, the pin 4 of the door A engages with the long groove 7 of the arm 8 as shown in FIG. 3 and moves together with the arm 8 in the closing direction. When the arm 8 exceeds the deadline C, the urging force of the spring 12 is reversed, and the arm 8 is rotated together with the door A toward the closed position. When the arm 5 approaches the end of the closed position, the tip of the piston rod 17 comes into contact with the end surface 20 of the arm 8, and the piston rod 17 moves backward while gradually reducing the resistance force caused by the fluid in the cylinder. Rotates to the closed position. Thereby, the sudden closing movement of the door by the spring 12 can be eased, the door A can be closed smoothly, and the occurrence of vibration and impact sound due to impact can be prevented. Since the force of the spring 19 in the cylinder 15 is set smaller than the force of the spring 12, the closing motion of the door A is not impaired.

  When the door A is opened from the door closed position in FIG. 4, the arm 8 also rotates with the door to the open position in FIG. 3, so that there is no restriction to hold down the tip of the piston rod 17, and the piston rod 17 protrudes by the force of the spring 19. Gradually return to posture.

In the embodiment shown in FIGS. 1 to 4, the pin support plate 3 for supporting the pin 4 is made of an elastic material, and the portion of the tip of the pin 3 facing the arm 8 is formed by an inclined surface 4a. Yes.
Accordingly, when the arm 8 is accidentally pushed into the closed position by hand or the like with the door A opened (see FIG. 1), the door 4 is closed in the closing direction, as shown in FIG. The inclined surface 4a comes into contact with the lower edge of the arm 8, the pin support plate 3 is elastically deformed, and the pin 4 moves downward, and is fitted into the long groove 7 of the arm 8 as shown in FIG. Therefore, it can operate normally from the next operation.

  Further, as shown in FIG. 7, the pin 4 having the inclined surface 4 a can be formed so that it can be elastically moved up and down by the spring 21. In the embodiment shown in FIGS. 6 and 7, the inclined surface 4a may be formed on the lower edge of the arm 8 as shown in FIG.

  In the above embodiment, an air damper using air is used as the damper 14. However, as shown in FIG. 9, oil is filled in the closed chamber space of the cylinder 15, and the left and right oil chambers separated by the piston 16 are communicated. It is also possible to use an oil damper having a structure in which the communication hole 22 is provided.

  Although the embodiments of the present invention have been described above, the present invention is not necessarily limited to the structures of these embodiments. For example, in the above embodiment, the frame 5 of the apparatus is attached to the frame B and the pin 4 is attached to the door A. However, the frame 5 can be attached to the door A and the pin 4 can be attached to the frame B. is there. In addition, the present invention can be implemented with appropriate modifications within the scope of the present invention, achieving the object of the present invention, and achieving the above effects.

  The opening / closing device for a swing door according to the present invention can be used for swing doors such as joinery and furniture.

BRIEF DESCRIPTION OF THE DRAWINGS Explanatory perspective view which shows one Example of the opening / closing apparatus of the rotation door which concerns on this invention. The partial cross section top view which shows the closing process of the door in this invention. The partial cross-sectional top view similar to FIG. 2 which shows the closing process of the door in this invention. The partial cross section top view which shows the attitude | position which the door closed in this invention. Sectional drawing which shows one Example of the damper in this invention. Sectional drawing which shows one Example of the pin in this invention. Sectional drawing which shows the other Example of the pin in this invention. Sectional drawing which shows another Example of the pin in this invention. Sectional drawing which shows the other example of the damper in this invention.

Explanation of symbols

A Door B Frame C Deadline 2 Frame opening 4 Pin 5 Frame 7 Long groove 8 Arm 2 Center hinge 3 Glide 4 框 5 Rail 10 Arm side support point 11 Frame side support point 12 Spring 14 Damper

Claims (3)

  An opening / closing device for a rotary door that opens and closes an opening of a frame body, and includes a frame of an opening / closing device attached to one of the frame body or the door and a pin attached to the other. A pivot arm having a long groove that freely engages is provided, and the arm is formed so as to be pivotable from a closed position stored in the frame to an open position starting from the frame by a predetermined angle. The spring is stretched between the support point on the side and the support point on the frame side so as to be reversely biased to the closed position and the open position with the deadline as a boundary. A damper is provided to relieve abrupt rotation by the spring when rotating toward the closed position beyond the position where the pin waits in the open position during the door closing process. To have opening and closing device of the pivoting door is formed so as to engaged in the long groove of the arm.   2. The opening / closing device for a rotating door according to claim 1, wherein the door is provided with the pin, and the frame is provided with a frame of the opening / closing device.   The pin is held by a pin support plate, and an inclined surface is provided at a portion of the upper end of the pin facing the arm or a lower edge portion of the arm facing the pin so that the pin or the pin support plate can move up and down elastically. The opening / closing apparatus of the rotation door of Claim 1 or 2 currently formed in this.

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