JP3184933U - Simple automatic closing device for door - Google Patents

Abstract

A simple automatic closing device that can be applied to a relatively light door at a low cost.
A stretchable bag member 12 having a wall-side fixture 10 at one end and a door-side fixture at the other end, and a wall-side fixture and a door-side fixture along the stretchable bag member. And an elastic long member 5 that is disposed between the doors and applies a closing force to the door. The elastic bag member expands and contracts with the opening and closing of the door, and its volume 7 changes. The valve device 13 that allows gas to enter and exit due to the volume change is disposed on the stretchable bag member. This valve device has a large-diameter valve hole for intake and a small-diameter valve hole 15a for exhaust, and opens the large-diameter valve hole by a negative pressure when the elastic bag member is expanded, and by a positive pressure when contracting The automatic closing is gradually performed by the operation of the one-way valve body 15 that closes the large-diameter valve hole.
[Selection] Figure 1

Description

  The present invention relates to a simple automatic closing device for a door that automatically closes an opened door.

  Many types of automatic door closing devices are known and are available on the market. The doors are automatically closed when the doors at the entrance of the building are opened by hand and then released. . Among them, as shown in, for example, Patent Documents 1 and 2, the most frequent case has a complicated mechanism including a piston mechanism, a working fluid, a brake valve, and a link mechanism. These known automatic closing devices are intended for heavy door opening and closing operations and exhibit high performance commensurate with the complexity of the configuration.

  By the way, the doors of homes are often opened and closed more frequently than the entrances, but it is difficult to invade mosquitoes, dogs and cats, and the doors must be closed one by one. Even though there is an example of attaching an automatic closing device to the door of the entrance door, there are few examples of attaching to the door of the doorway. In order to save energy by limiting the heating and cooling to one room, it is preferable to attach an automatic closing device to the door of the entrance / exit that partitions the rooms, but there are few examples.

JP 2004-3293 A JP 2010-248739 A

Conventional automatic closing devices have high performance, but are complicated and expensive, so they are not suitable for installation on doors for entrance doors and doors for entrances and exits.
An object of the present invention is to provide a simple automatic closing device for a door that is adapted to be attached to a lightweight door with a simple and inexpensive configuration.

  The door automatic closing device according to the present invention includes a stretchable bag member having a wall-side fixture on one end and a door-side fixture on the other end, and the wall side extending along the stretchable bag member. An elastic long member that is disposed between the fixture and the door-side fixture and elastically expands and contracts to apply a closing force to the door. The elastic bag member expands and contracts as the door is opened and closed, and its volume changes. A valve device that allows gas to enter and exit due to the volume change is disposed at an appropriate portion of the stretchable bag member. This valve device is composed of a valve hole forming member having a large diameter valve hole and a one-way valve body which is arranged to open and close the large diameter valve hole from one direction in the valve hole forming member and which has a small diameter valve hole. To do. The one-way valve body opens the large-diameter valve hole by a negative pressure when the stretchable bag member is expanded, and closes the large-diameter valve hole by a positive pressure when contracting, whereby the door The opening operation by hand becomes easier and the automatic closing is performed slowly.

  This simple automatic closing device for a door does not require a rotating mechanism or a link mechanism, and does not have an airtight sliding portion like a piston mechanism, and therefore can be applied inexpensively to a light door.

The expanded sectional view of the wall side attachment part which shows one Example of this invention Enlarged sectional view of the door-side mounting portion of the same embodiment Sectional drawing which shows the guide cylinder of the Example Longitudinal sectional view showing the elastic bag member of the embodiment The expanded perspective view which shows the principal part of the valve apparatus of the Example The perspective view of the principal part of the wall side fixture of the Example Vertical sectional view of the valve device part of the same embodiment Plan view of the entrance / exit part of the building of the same embodiment The top view of the entrance-and-exit part of a state different from FIG. 8 of the Example Partially cutaway plan view showing a modification of the present invention

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 8 and 9, the automatic closing device 1 is connected between the door 3 provided at the entrance 2 of the building and the wall 4 and automatically closes the door 3 opened by hand. Has the effect of rotating in the direction. In the automatic closing device 1, the closing force of the door 3 is obtained by an elastic long member connected between the door 3 and the wall 4, for example, a rubber string 5 in which a plurality of members are bundled. A telescopic guide cylinder 6 (FIG. 3) for accommodating and guiding the rubber cord 5 and an air damper 7 for preventing the automatic automatic closing of the door and automatically closing it gently are provided.

  The guide tube 6 includes first and second guide tube members 8 and 9 which are curved in a semicircular shape, and the telescopic telescope which has the first guide tube member 8 inserted into the second guide tube member 9. Combine with the structure. The attachment end 8a of the first guide cylinder member 8 is attached to the wall 4 via the first attachment (wall-side attachment) 10 (FIG. 1), and the attachment end 9a of the second guide cylinder member 9 is attached. It attaches to the door 3 via the 2nd attachment (door side attaching part) 11 (FIG. 2). Thus, when the door 3 is opened and closed, the first guide cylinder member 8 slides and moves with respect to the second guide cylinder member 9, and the guide cylinder 6 expands and contracts in an arc shape.

  The air damper 7 includes a bellows-like stretchable bag member 12 (FIG. 4) housed in the guide cylinder 6 and a valve device 13 (FIG. 4) provided at an appropriate portion, for example, one end of the stretchable bag member 12. 1 and FIG. 5). As shown in FIG. 1, one end of the elastic bag member 12 is hermetically sealed with a valve hole forming film 14, which is a valve hole forming member constituting the valve device 13, on the connecting tube portion 10 a formed on the first fixture 10. 2 and the other end of the elastic bag member 12 is hermetically bonded to the outer periphery of the closed end of the connecting tube portion 11a formed on the second fixture 11. As shown in FIG. Thereby, when the telescopic structure guide tube 6 expands and contracts by opening and closing the door 3, the stretchable bag member 12 also expands and contracts.

  When the elastic bag member 12 expands and contracts by opening and closing the door 3, the volume changes, and accordingly, gas is sucked and discharged through the valve device 13. As shown in FIGS. 6 and 7, the valve hole forming film 14 of the valve device 13 is attached so as to cover the projecting end opening of the connecting cylinder portion 10a of the first fixture 10, and the diameter is large at an appropriate portion thereof. A one-way valve body 15 having a small diameter valve hole 15a is provided in the valve hole 14a and the large diameter valve hole 14a.

  The valve hole forming film 14 having the large diameter valve hole 14a, the small diameter valve hole 15a, and the one-way valve body 15 is formed by integral molding with synthetic rubber. By forming the end groove 14a at the time of molding, the one-way valve body 15 is integrally connected to the edge of the large diameter valve hole 14a via the connecting piece 15b, and the one-way valve body 15 is connected to the connecting piece 15b. It is possible to move in and out of the large diameter valve hole 14a with bending. In order to maintain the large-diameter valve hole 14a in a closed state only for the airflow in the exhaust direction of the one-way valve body 15, a stopper portion 10c is formed inside the connecting cylinder portion 10a of the first fixture 10. .

  In order to allow the gas in the elastic bag member 12 to enter and exit between the inside and outside of the guide tube 6, a portion of the outer periphery of the connecting tube portion 10 a and the outer periphery of the first guide tube member 8 that is close to the mounting end Ventilation openings 10b and 8b are formed respectively. Of the both ends of the rubber string 5 accommodated in the guide tube 6, one end side is clamped with the fixture 10 by a support ring 16 as shown in FIG. 1, and the other end side is supported as shown in FIG. The ring 17 is clamped by the fixture 11, thereby connecting the ends of the rubber cord 5 to the attachment end sides of the first guide cylinder member 8 and the second guide cylinder member 9, respectively.

  Next, the operation of the above configuration will be described. When the door 3 is stationary at the open position or the closed position, there is no pressure difference between the inside and the outside of the stretchable bag member 12, so that the one-way valve body 15 has a diameter as shown by a solid line in FIG. The large valve hole 14a is maintained in a substantially closed state in which only the end groove 14b having a small opening area is vented. When the door 3 is in the closed state shown in FIG. 8, the guide tube 6 is in the most shortened state, and the elastic bag member 12 and the rubber string 5 are also in the most shortened state.

  When the door 3 is rotated in the opening direction by hand as shown in FIG. 9, the guide cylinder 6 extends in an arc shape due to the relative sliding of the first and second guide cylinder members 8 and 9, and accordingly. The elastic bag member 12 and the rubber string 5 are extended. When the elastic bag member 12 expands, negative pressure is generated as the volume thereof increases, so that the one-way valve body 15 is deformed inward of the bag member as shown by an imaginary line in FIG. It opens, and gas flows into the elastic bag member 12 through this valve hole 14a. At this time, since the diameter of the large-diameter valve hole 14a through which the gas passes is relatively large, the negative pressure of the stretchable bag member 12 is easily extended to be small, and thereby the door 3 can be opened with a light force.

  When the hand is released from the opened door 3, the door automatically rotates in the closing direction due to the contraction force of the rubber cord 5. The elastic bag member 12 also contracts due to the rotation in the closing direction, the internal gas pressure changes to a positive pressure, and the one-way valve body 15 closes the large-diameter valve hole 14a as shown by the solid line in FIG. Thereafter, the gas in the elastic bag member 12 is exhausted through the small diameter valve hole 15 a formed in the one-way valve body 15.

  Since the small-diameter valve hole 15a has a relatively small diameter, exhaust is gradually performed, and the shrinkage speed of the elastic bag member 12 is reduced accordingly. Therefore, the closing speed of the door 3 becomes slow, and the rubber string 5 shrinks. Sudden automatic closing of the door 3 by force is prevented. As the door 3 is opened and closed, the rubber string 5 expands and contracts along the arc-shaped surface, which is the inner surface of the guide tube 6, so that the direction of the force always faces the tangential direction of the arc trajectory of the door. As a result, the contraction force of the rubber string 5 can be effectively contributed to the closing force of the door 3.

  In the above embodiment, the guide tube 6 is a guide member for contracting the shrinkable bag member and the elastic long member along the arc axis, so any structure capable of obtaining this action may be used. It is not limited to the telescopic structure of the member. The elastic long member for obtaining the closing force of the door is a rubber string, but a metal coil spring may be used. In the said Example, although the elastic bag member 12 was made into the bellows tube, it is not restricted to this, What is necessary is just an airtight bag which hold | maintains circular arc shape, or is hold | maintained and expands / contracts.

  When the elastic bag member 12 is a bellows tube or a bag member that expands and contracts while maintaining an arc shape, the guide tube 6 is not necessary, and the elastic bag member 12 may have the function of the rubber cord 5. A specific example thereof is a modification shown in FIG. In this example, the elastic telescopic tube 18 is connected between the wall 4 and the door 3 via the wall-side fixture 10 and the door-side fixture 11 as described above. The elastic telescopic tube 18 has a configuration in which the tube wall is formed into a bellows-like tube having a V-shaped bent portion 19 continuously. The tube wall including the V-shaped bent portion 19 is formed into a thick wall with synthetic rubber, and in particular, the opening angle of the V-shaped bent portion 19 is formed into a shape close to zero degrees in a natural state.

  Accordingly, the elastic telescopic tube 18 brings a closing force to the door 3 by a strong elastic force due to the thick wall of the V-shaped bent portion 19 when the door 3 is opened as shown in FIG. Abrupt closing at this time is prevented by the valve device 13 similar to the above-described device mounted on the wall-side fixture 10. In this configuration, the bellows-like elastic telescopic tube 18 serves as the above-described guide tube 6 and the rubber cord 5 as a result of holding a strong elastic force and a forming brazing that expands and contracts while maintaining an arc shape by the thick bellows wall. It will be.

  3 is a door, 5 is a rubber string, 6 is a guide tube, 7 is an air damper, 8 is a first guide tube member, 9 is a second tube member, 10 and 11 are fixtures, 12 is an elastic bag member, 13 is a valve device, 14 is a valve forming membrane, 14a is a large diameter valve hole, 15 is a one-way valve body, 15a is a small diameter valve hole, 18 is an elastic telescopic tube, and 19 is a V-shaped bent portion.

Claims (4)

  A stretchable bag member having a wall-side fixture on one end side and a door-side fixture on the other end side, and disposed between the wall-side fixture and the door-side fixture along the stretchable bag member, An elastic long member for applying a force in the closing direction to the door, and a valve device that is arranged at an appropriate part of the elastic bag member and allows gas in and out of the elastic bag member, The valve device includes a valve hole forming member having a large diameter valve hole, and a one-way valve body disposed on the valve hole forming member so as to open and close the large diameter valve hole from one direction and having a small diameter valve hole. The one-way valve body is characterized in that the large-diameter valve hole is opened by a negative pressure when the elastic bag member is expanded, and the large-diameter valve hole is closed by a positive pressure when contracting. A simple automatic closing device for doors.   Furthermore, it has the guide cylinder which becomes the 1st and 2nd guide cylinder member combined with the telescope structure, this guide cylinder is arrange | positioned between the said wall side fixture and the said door side fixture, and this guide The simple automatic closing device for a door according to claim 1, wherein the elastic bag member and the elastic long member are accommodated in a cylinder.   3. The door automatic simple closing device according to claim 1, wherein the elastic long member is a rubber or a metal spring. 3. The door automatic closing device according to claim 1, wherein the elastic bag member and the elastic long member are made of a bellows-like elastic elastic tube having both functions. .

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