JP2007063867A - Door closer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door closer which is different in idea from a conventional door closer using a rack, a pinion and a hydraulic damper. <P>SOLUTION: An output torque shaft 12 which is fixedly provided with a horizontal working arm 13 is rotatably planted on a horizontal base plate 11; the tip of a piston 15 of a spring damper 14 of such a type as to be cushioned during protrusion is linked to the tip of the working arm 12; the base end of a cylinder 10 of the spring damper is supported so as to be swingable on the base plate; the base plate is mounted to the door 8; and the torque shaft 12 is connected to a door frame via a link mechanism which is composed of a main arm 6 and a fork arm. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a novel door closer.

  The door closer automatically closes the swing door by using a spring and a link mechanism. For example, as shown in Patent Document 1, FIG. 1 and FIG. 2, a compression coil spring 2 is provided in a cast cylinder 1. The rack 3 biased by this and the pinion 4 that meshes with the rack 3 are provided.

  Then, the movement of the rack that is moved to the right by being pushed by the compression coil spring 2 at the time of closing the door is converted into the rotation of the pinion 4, and the rotation of the pinion shaft 5 (see FIG. 1) coupled to the pinion 4 is changed to the main. It is transmitted to the door 8 through a link mechanism comprising the arm 6 and the fork arm 7, and the door opened as shown by a chain line in FIG. 1 is closed as indicated by a solid line.

In that case, the door 8 is accelerated and vigorously collides with the door frame, and noise and vibration are generated. Therefore, the hydraulic oil is filled in the cylinder 1 and the viscous resistance generated when the hydraulic oil passes through the orifice 9 is generated. Is used to buffer the rack 3 and the drive mechanism linked thereto.
Japanese Patent Laid-Open No. 10-037585

  Of course, door closers using the above hydraulic dampers have been practically used with their intended functions. However, a compression coil spring 2, hydraulic oil, rack 3, pinion 4, or orifice 9 or the like is incorporated in the cylinder 1. Therefore, the structure is complicated and therefore generally expensive.

  Further, since the cylinder 1 has a complicated structure, it cannot be manufactured only by turning or grinding, and a casting such as aluminum must be further worked by turning or grinding, which is troublesome. .

  Furthermore, in principle, the door cannot be held in a state where the door is opened at a certain angle. For example, in order to keep the door open for carrying luggage into the room, an additional opening holding mechanism must be provided. The structure as a door closer is further complicated.

  In addition, since the hydraulic oil sealed in the casting cylinder is used at a high pressure, there is still room for improvement, such as a high-performance sealing mechanism for preventing oil leakage.

  Accordingly, an object of the present invention is to provide a novel door closer that has a different idea from the conventional door closer.

  In order to achieve the above object, the invention according to claim 1 is characterized in that an output torque shaft having a horizontal operating arm fixed on a horizontal substrate is rotatably installed, and at the tip of the operating arm, The piston tip of the type of spring damper that is cushioned when protruding is linked and the base end of the cylinder of the spring damper is pivotably supported on the board, while this board is attached to one of the door and door frame The output torque shaft is connected to the other via a link mechanism including a main arm and a fork arm.

  According to the first aspect of the present invention configured as described above, when the force of opening the door is applied in the direction of pushing the piston of the spring damper into the cylinder via the link mechanism, While the tip of the piston protruding from the cylinder is pushed against the tip of the operating arm, torque is generated in the output torque shaft, and this torque is transmitted to the door via the link mechanism consisting of the main arm and the fork arm. Since this is closed while buffering, the structure becomes very simple.

  Further, if the operating arm is lengthened, it operates even if the output of the spring damper is small, so that not only can the force for opening the door be reduced, but also the impact when closing the door can be reduced.

  Furthermore, since the torque of the output torque shaft becomes zero when the spring damper and the operating arm are in a straight line, the door can be opened without incorporating an additional mechanism using this door opening angle as a speculative angle. Can be kept in a state.

  In addition, when opening the door beyond the speculative angle, the torque of the output torque shaft acts in the direction to open the door, so it will automatically open when the door is opened beyond the speculative angle without incorporating an additional mechanism. Further, it is possible to maintain the door opening angle.

  In addition, since the angle between the operating arm and the piston at one opening angle of the door can be arbitrarily set, in other words, since various link mechanisms for closing the door can be designed, for example, the output torque near the door closing angle is increased. By increasing the degree of buffering, there are various effects such as reducing the speed of the piston and eliminating the speed switching device built in the conventional door closer.

  A horizontal operating arm is fixed to the output torque shaft equivalent to the conventional pinion shaft, and the tip of this operating arm is pushed by the tip of the piston of a spring damper that is buffered when protruding. However, it was possible to construct a novel door closer having various functions.

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 3, reference numeral 11 denotes a substrate, and the substrate 11 in the illustrated embodiment is an elongated rectangular plate-like body.

  An output torque shaft 12 is rotatably installed at one end of the substrate 11 (lower left corner in the illustrated embodiment). In the illustrated embodiment, for example, one end of the output torque shaft 12 is supported by a ball bearing (not shown) mounted at the lower left corner of the substrate 11.

The other end portion of the output torque shaft 12 is fixed with a base end of a working arm 13 that is horizontal and parallel to the substrate 11 in the context of FIG. 3. The tip of the piston 15 of the spring damper indicated by reference numeral 14 is linked.

  Here, the connection between one member and another member via a mechanistic joint is referred to as a link connection.

  As shown in FIG. 4, the spring damper 14 is a cylinder 10 filled with hydraulic oil, in which a piston 15 urged outwardly by the compression coil spring 2 is housed.

  An orifice 9 and a check valve 16 are respectively provided in flange portions formed at the inner end of the piston 15 and fluid-tightly fitted with the inner hole of the cylinder 10. In the embodiment shown in FIG. When is pushed into the cylinder, the check valve opens and the orifice 9 does not operate.

  On the other hand, when no external force is applied to the piston 15, the check valve 16 is closed, the orifice 9 is operated, and the piston 15 is buffered.

  The spring damper 14 having such a structure is well known in the art, and a spring damper of a type that is buffered when the piston 15 is pushed into the cylinder is used as a shock absorber for a motorcycle, for example.

  Returning to FIG. 3, the base end of the spring damper 14 in which the tip of the piston is linked to the tip of the operating arm 13 is supported on the substrate 11 so as to be swingable.

  In this case, it is important to prevent the spring damper 14 from being bent in the thickness direction of the substrate. Therefore, the length direction of the output torque shaft 12 depends on the dimensions of the cylinder of the spring damper 14. The coupling position of the operating arm 13 is set appropriately.

  Then, as shown in FIG. 5, the board 11 is housed in a suitable outer case 17 and attached to the door 8, and the output torque shaft 12 that protrudes out of the outer case 17 through the ceiling plate of the outer case 17. One end of the main arm 6 is fixed to the head.

  One end of the fork arm 7 is linked to the other end of the main arm 6 and the other end of the fork arm 7 is connected to the door frame via a bracket 18 that is linked to the other end of the fork arm 7.

  In the door closer according to one embodiment of the present invention constructed as described above, the piston 15 of the spring damper pushes the tip of the operating arm 13 when the door is closed, and torque is applied to the output torque shaft 12 in the same manner as the pinion shaft in the conventional closer. And the output torque shaft 12 operates as a door closer, as is apparent from the fact that the output torque shaft 12 is coupled to a link mechanism comprising a main arm and a fork arm in the same manner as a conventional door closer.

  When the angular interval between the main arm 6 and the operating arm 13 is a value as shown in FIG. 3, for example, when the main arm 6 is at the angular position shown by the solid line in FIG. The shafts are aligned, and at this time, as described above, the output of the output torque shaft 12 becomes zero.

  At this time, as shown by a chain line in FIG. 5, if the door 8 is set to be at an angular position perpendicular to the door frame, the door is automatically released if the hand is released before the opening angle of the door 8 reaches 90 degrees. The door automatically turns to the open angle position of 180 degrees when the hand is released after having been closed 90 degrees.

  A link mechanism having various operating characteristics can be designed by variously setting the angular interval between the door 8 and the main arm 6 and the angular interval between the main arm 6 and the operating arm.

  6 to 8 show another embodiment of the present invention. In the spring damper in this embodiment, as shown in FIG. 6, a flange 19 is formed at the base end of the piston 15 and the cylinder 10 is free. A brake hole 21 and a brake orifice 22 are formed inside the end portion (opposite the base end).

  In the spring damper configured as described above, in the constant speed stroke shown in FIG. 6, the hydraulic oil moves from the left side of the cylinder 10 to the right side through the (constant speed) orifice 5 as indicated by an arrow. The piston extends at a constant speed.

  When the piston 15 extends to the position shown in FIG. 7, the flange 19 of the piston is fitted into the brake hole 21, and the hydraulic oil must pass through both the brake orifice 22 and the (constant speed) orifice 9. The brake is applied.

  When the piston further extends and reaches the end as shown in FIG. 8, the flange 19 penetrates through the brake hole 21 and the brake is released.

  Therefore, if the link mechanism is set so that the door 8 is closed with the piston 15 fully extended as shown in FIG. 8, the brake is applied just before the door is closed, and the shock at the time of closing the door is greatly increased. It is reduced.

The diagrammatic top view of the door mouth equipped with the conventional door closer. The diagrammatic longitudinal cross-sectional view of the cylinder of the conventional door closer. The schematic plan view which shows the principal part of the door closer by one Example of this invention. The diagrammatic longitudinal cross-sectional view which shows an example of a spring damper. 1 is a diagrammatic plan view of a door opening equipped with a door closer according to an embodiment of the present invention. FIG. FIG. 5 is a diagrammatic longitudinal sectional view of a spring damper according to the invention as set forth in claim 2 and shows a constant speed stroke. FIG. 5 is a diagrammatic longitudinal sectional view of a spring damper according to the invention as set forth in claim 2, showing a state where a brake is applied. FIG. 6 is a diagrammatic longitudinal sectional view of a spring damper according to a second aspect of the present invention, showing a state where the piston is brought to the end and the brake is released at the same time.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder 2 Compression coil spring 3 Rack 4 Pinion 5 Pinion shaft 6 Main arm 7 Fork arm 8 Door 9 Orifice 10 Cylinder 11 Board | substrate 12 Output torque shaft 13 Actuating arm 14 Spring damper 15 Piston 16 Check valve 17 Outer cover 18 Bracket 19 Flange 21 Brake hole 22 Brake orifice

Claims (2)

  An output torque shaft having a horizontal operating arm fixed on a horizontal substrate is rotatably installed, and the tip of the piston of a spring damper that is buffered when protruding is linked to the end of this operating arm. At the same time, the base end of the cylinder of the spring damper is supported so as to be able to swing on the board. On the other hand, this board is attached to one of the door and the door frame, and the output torque shaft is connected to the link mechanism comprising the main arm and the fork arm. The door closer is connected to the other through the door.   A flange is formed at the base end of the piston of the spring damper, while a brake hole and a brake orifice are formed on the free end of the cylinder of the spring damper in a fluid-tight manner with the flange, and these are formed at the end of the piston stroke. 2. The door closer according to claim 1, wherein the brake is applied to the piston by fitting the flange and the brake hole so that the hydraulic oil passes through both the brake orifice and the orifice.

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