JP2007303077A - Opening/closing device of folding door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inexpensively provide an opening/closing device of a folding door, which cushions a shock during the closing of the folding door by incorporating a damper for alleviating the rapid closing motion of the folding door. <P>SOLUTION: In the folding door 1, right and left door bodies are foldably connected together via a center hinge 2, and urged to a closing position by means of a spring which is incorporated into the center hinge. The folding door 1 is equipped with the damper 10 for alleviating the rapid closing motion of the folding door 1. The damper comprises: a piston, a piston rod 13 which is extended out in a door-body closing direction; a fluid for generating a resistance force against the movement of the piston; and a spring for urging the piston rod 13 so as to put it into a protruding attitude. A spring force is set smaller than a door-body closing force of the spring. A cylinder slides with a sliding body 3 in the door-body closing direction along a rail in the vicinity of the closing position of the door body, and the rapid closing motion of the door body is alleviated by making a leading end of the piston rod 13 abut on the fixing surface 7. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a folding door opening / closing device, and more particularly, to a folding door opening / closing device provided with a damper that alleviates a sudden closing movement of the folding door.

Conventionally, when closing a folding door by hand, the left and right door bodies are forcibly forced by the spring force built into the center hinge that connects the left and right door bodies of the folding door, even if the hand is released near the end of the closing motion. In general, it is formed so as to close to the final closed position where it becomes a linear posture. Such a center hinge is disclosed in Patent Documents 1 to 4, for example.
Japanese Patent Publication No. 55-47191 Japanese Utility Model Publication No. 63-134088 No. 03-30541 Japanese Patent Laid-Open No. 03-228989

  However, the force of the spring built into the center hinge acts abruptly in the vicinity of the end of the folding door closing movement, so there are problems such as the generation of vibration and impact sound due to the impact when the folding door is closed. there were.

  Accordingly, the present invention incorporates a damper that reduces the sudden closing motion of the folding door by the spring near the end of the closing motion of the folding door, thereby reducing the impact when the folding door is closed and smoothly folding the folding door. The main purpose is to provide a door opening and closing device at a low cost.

  In order to achieve the above object, the present invention takes the following technical means. That is, in the folding door opening and closing device according to the present invention, the left and right door bodies are foldably connected by the center hinge, and the sliding body provided at the end of at least one door body is slidably mounted on the rail. And a folding door that is urged to a closed position where the left and right door bodies are in a linear posture by a spring incorporated in the center hinge, and includes a damper that alleviates a sudden closing movement of the door body, The damper includes a cylinder slidably mounted on the rail, a piston slidably received in the cylinder, and extends from the piston through the end wall of the cylinder toward the door body closing direction. A piston rod, a fluid that generates resistance to the movement of the piston rod in the cylinder, and a spring that constantly urges the piston rod in a projecting posture. The cylinder is set to be smaller than the closing force of the spring body incorporated in the hinge, and the cylinder slides along the rail along the rail in the door closing direction at least near the closing motion end of the door body, It was set as the structure currently formed so that the sudden closing motion of a door body might be eased by contact | abutting with a fixed surface.

  Here, the damper mentioned above means that when the piston rod in the cylinder receives an external pressure to push the piston rod into the cylinder, the piston in the cylinder causes the resistance of the fluid pressure in the cylinder (generally, this resistance is applied). This is a type of shock absorber that is gradually moved in the direction of pushing in the piston rod while attenuating the resistance force.

  In addition, it is preferable to use a vertical surface of a fixed frame built around the folding door as the fixed surface with which the tip of the piston rod comes into contact. However, a separate vertical contact piece may be fixed to the rail. Good.

  In the present invention, the cylinder of the damper is provided with an engagement piece with which the sliding body engages so that the cylinder engages with the sliding body and moves together in the vicinity of the closing end of the door body. It is good to do.

  Furthermore, in the present invention, it is preferable in terms of cost that the damper is provided with an air vent hole on the wall surface of the piston or cylinder and the fluid filled in the cylinder is air.

  Since the present invention is configured as described above, when the folding door is closed, the sliding body of the door body presses the cylinder of the damper near the end of the closing motion to generate a resistance force due to fluid in the cylinder. The door hinge can be moved slowly in the closing direction by the spring force of the center hinge while gradually attenuating, so that the sudden closing movement of the folding door by the spring of the center hinge is alleviated and the folding door is closed smoothly Therefore, it is possible to prevent generation of vibration and impact sound due to an impact, and it is possible to manufacture the damper at a low cost because it has a simple structure in which the damper is incorporated into the rail.

  1 to 6 show an embodiment of a folding door opening and closing device according to the present invention, and reference numeral 1 denotes a folding door. The folding door 1 includes a pair of left and right door bodies 1a and 1b that are foldably connected by a center hinge 2. Each door body 1a and 1b has a sliding body 3 formed by sliding pins on the upper and lower surfaces of the free end portion. The sliding body 3 is incorporated so as to be slidable along the rails 5 attached to the upper and lower ridges 4. In the drawing, the lower rail and the sliding body are omitted. As shown in FIG. 1, the upper rail 5 is formed in two stages, that is, an upper rail 5a and a lower rail 5b. The sliding body 3 is fitted to the lower rail 5b so as to be able to travel, and a cylinder of a damper 10 described later is placed on the upper rail 5a. 11 is slidably mounted. In this embodiment, the sliding body 3 of the door body 1b is fixed to the rail 5, but it may be allowed to slide along the rail.

  When the left and right doors 1a and 1b are closed to the closed position where the left and right door bodies 1a and 1b are in the linear posture, the left and right positions of the center hinge 2 are close to the end of the closing motion. What incorporates the spring (not shown) which forces the door bodies 1a and 1b toward the closed position is used. Since the mechanism of the center hinge is a technique widely known from the above patent documents and the like, detailed description thereof is omitted.

  In the present invention, a damper 10 is provided to alleviate a sudden closing movement of the doors 1a, 1b by the spring of the center hinge 2.

  In the present embodiment, a so-called air damper is used as the damper 10, and a cylinder 11 slidably mounted on the upper rail 5 a of the rail 5 and a piston slidably accommodated in the cylinder 11. 12, the piston rod 13 extending from the piston through the end wall of the cylinder toward the door closing direction (left direction in FIGS. 2 to 6), and the movement of the piston rod 13 within the cylinder 11. A fluid that generates a resistance force, that is, air, an air vent hole 14 formed in an end wall of the cylinder 11 to attenuate the resistance force, and a spring 15 that constantly biases the piston rod 13 in a protruding posture. The force of the spring 15 is set smaller than the door closing force of the spring incorporated in the center hinge 2.

  The cylinder 11 is engaged with the sliding body 3 of the door body 1a in the vicinity of the end of the closing motion of the suspension door 1 so that the cylinder 11 moves in the door body closing direction along the rail together with the sliding body 3. An engagement piece 16 extending downward is provided.

  In the above configuration, when the folding door is closed from the folding position (open position) of the folding door 1 in FIG. 3, the sliding body 3 of the door body 1 a is engaged with the cylinder 11 as shown in FIG. The cylinder 11 moves with the sliding body 3 in the door closing direction (left direction in the figure) by engaging with the piece 16. As a result, the tip of the piston rod 13 protruding from the cylinder 11 hits the vertical fixing surface 7 of the frame 6, and a resistance force by air is generated against the movement of the cylinder 11 in the cylinder 11. Since this air gradually escapes from the air vent hole 14, the resistance force gradually attenuates. Thereby, the sliding body 13 of the door body 1a is slowly moved in the closing direction by the force of the spring of the center hinge 2, and finally the resistance force of the air in the cylinder 11 becomes zero, as shown in FIG. The cylinder rod 13 is pushed into the cylinder 11 and the folding door 1 is closed at the closed position. Thereby, the sudden closing motion of the folding door by the spring of the center hinge 2 can be eased, the folding door can be closed smoothly, and the occurrence of vibration and impact sound due to impact can be prevented. The force of the spring 15 in the cylinder 11 is set to be smaller than the closing force of the spring body incorporated in the center hinge 2, so that the closing movement of the folding door is not impaired.

  Further, when the folding door is opened from the folding door closed position in FIG. 4, there is no restriction for suppressing the tip of the piston rod 13, so that the piston rod 13 returns to the protruding posture by the force of the spring 15.

  In the present invention, as shown in FIG. 7, the cylinder 11 and the sliding body 3 may be connected by a connecting portion 17 so that the sliding body 3 and the cylinder 11 always slide integrally. Good.

  In the above embodiment, the air damper using air is used. However, as shown in FIG. 9, the cylinder 11 is filled with oil, and the communication hole 18 for communicating the left and right oil chambers separated by the piston 12 is formed. It is also possible to use an oil damper having a provided structure. In the embodiment shown in FIG. 8, fluid such as air can be used instead of oil.

  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, the sliding body 3 may be a roller instead of a pin. In this case, it is preferable to install the damper 10 integrally with the frame of the sliding body 3 as shown in FIG. 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 folding door opening and closing device according to the present invention can be used for all folding doors such as joinery and furniture.

The perspective view of the principal part which shows one Example of the opening / closing apparatus of the folding door which concerns on this invention. The schematic plan view which shows the closed position of the folding door in this invention. The schematic plan view which shows the open position of the said folding door. Sectional drawing which shows the closing process of the said folding door. It is sectional drawing which shows the closing process of the said folding door, Comprising: The process further developed from the state of FIG. Sectional drawing which shows the closed position of the said folding door. Sectional drawing which shows another Example of the opening / closing apparatus of the folding door which concerns on this invention. The perspective view which shows another Example of the opening / closing apparatus of the folding door which concerns on this invention. A sectional view showing an example of a damper called the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folding door 1a, 1b Door body 2 Center hinge 3 Sliding body 4 框 5 Rail 7 Fixed surface 10 Damper 11 Cylinder 12 Piston 13 Piston rod 14 Air vent 15 Spring 16 Engagement piece 17 Connection part

Claims (4)

  The left and right door bodies are foldably connected by a center hinge, a sliding body provided at the end of at least one door body is slidably mounted on the rail, and the left and right door bodies are mounted by springs incorporated in the center hinge. A folding door that is biased to a closed position in a linear posture, and includes a damper that relieves a sudden closing movement of the door body, and the damper includes a cylinder that is slidably mounted on the rail, , A piston slidably stored in the cylinder, a piston rod extending from the piston through the cylinder end wall toward the door closing direction, and resistance to movement of the piston rod in the cylinder And a spring that constantly biases the piston rod in a projecting posture, and the force of the spring closes the door of the spring incorporated in the center hinge. The cylinder is slid in the door closing direction along the rail along with the sliding body at least in the vicinity of the closing motion end of the door body, and the door body suddenly moves by contact with the tip of the piston rod and the fixed surface. A folding door opening and closing device that is designed to relieve the undue closing movement.   2. The folding door opening and closing device according to claim 1, wherein the cylinder of the damper is provided with an engagement piece so that the cylinder of the damper engages with the sliding body and moves together in the vicinity of the closing end of the closing motion of the door body.   The folding door opening and closing device according to claim 1, wherein the cylinder of the damper is connected to the sliding body of the door body via a connecting portion and is configured to always move together with the sliding body.   The folding door opening and closing device according to any one of claims 1 to 3, wherein the damper includes an air vent hole in a wall surface of a piston or a cylinder, and the fluid filled in the cylinder is formed by an air damper.

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