JPH0640287U - Door closure device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a door closing device that can obtain a sufficient pressure contact with a floor surface and can smoothly open and close the door without impairing airtightness and sound insulation performance. . [Structure] A rod 4 having one end fixed to a door 26 and the other end protruding from the suspension side of the door 26 toward the door frame 21.
The leaf spring 2 that pushes down the closing member 3 by bending downward as the rod is retracted is attached so that the center of the bending is located closer to the suspension base side than the center position in the width direction of the door 26.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a door closing device used to close a gap formed between a lower edge of a door and a floor surface in order to improve airtightness and sound insulation performance.

[0002]

[Prior art]

 Conventionally, an attempt to close the gap between the lower edge of the door and the floor surface in order to prevent drafts and improve soundproofing is disclosed in, for example, Japanese Utility Model Publication No. 60-102392. ing.

That is, the lower door closing device described in the above-mentioned publication includes a closing member (pressure contact member) provided at a lower end portion of the door in a state of being urged upward, and an end of the door on a hinged portion side. A linking mechanism that connects the closing member and the driving rod to each other, and the linking mechanism causes the linking mechanism to pull down the driving rod by abutting against the door frame when the door is closed. When the door is closed, the closing member projects downward from the lower end of the door to close the gap between the door and the floor surface, and when the door is opened, the drive rod and the door are closed. When the contact state with the frame is released, the closing member retracts so that the closing member does not interfere with the opening / closing operation of the door.

Further, in Japanese Utility Model Laid-Open No. 58-137786, a closing member (sealing base) that is movable upwards and downwards is provided at the lower end of a latent door and is movable by pulling and urging, and the closing member is provided on the side edge member of the main door. Between a position where a kicker, which abuts against the pivoting operating rod connected thereto to actuate the closing member downward through the pivoting operating rod, can contact the pivoting operating rod and a position where the kicker cannot contact the pivoting operating rod. If the kicker is set to a position where it can abut the pivot rod, the closing member will move downward at the same time as the closing of the sub-door and the gap between the sub-door and the floor will be opened. In addition to closing the door, the closing member can be retracted when the sub-door is opened.If the kicker is set in a position where it does not come into contact with the rotation operating rod, the closing member will be retracted even if the sub-door is closed. Of the door with a latent door that was left alone A closure device is disclosed.

[0005]

[Problems to be solved by the device]

 In such a door closing device, in order to smoothly open and close the door and ensure good airtightness and sound insulation, it is desirable that the closing member is in contact with the floor surface immediately before the door is closed. However, in general, if the timing adjustment between the lowering of the closing member and the closing of the door is difficult, and the closing member lowers too late with respect to the closing of the door, the opening and closing of the door will be smooth, but The pressure contact state of the closing member with the floor surface will be incomplete, resulting in drafts and insufficient soundproofing effect.

On the other hand, if the closing member descends too early with respect to the closing of the door, the closing member abutting the floor surface rubs against the floor surface, so that the door can be smoothly opened and closed. There is a problem in that the door is liable to be damaged or damaged especially at the door tip side of the closing member where the sliding distance with the floor surface becomes long, which is a problem in this kind of door closing device. It was

[0007]

[The purpose of the device]

 This invention has been made in view of the above problems in the conventional door closing device, and can open and close the door smoothly and ensure a sufficient pressure contact state with the floor surface. It is an object of the present invention to provide a door closing device that does not impair the airtightness and sound insulation performance and does not cause wear or damage to the closing member.

[0008]

[Means for Solving the Problems]

 A door closing device according to the present invention comprises a projecting member which is disposed so as to be retractable from a door suspension side to a side of a door frame which rotatably supports the door and a lower edge of the door. It is fixed to the door at one end side so that the center of deflection is located closer to the hanging side from the center position in the width direction of the door, and is connected to the projecting member at the other end side to project the protrusion. A spring that bends downward when a member is retracted, and a spring that is connected to a substantially central portion of the spring and moves up and down as the spring flexes, and the lower edge of the door in response to the retracting operation of the protruding member. It is characterized in that a structure is provided with a closing member that closes a gap formed between the floor and the floor surface, and the structure of such a door closing device is a means for solving the above-mentioned conventional problems. I am trying.

[0009]

[Function of the device]

 In the door closing device according to the present invention, in the closed state of the door, the projecting member projecting from the door suspension side to the door frame side is brought into contact with the door frame or a member provided on the door frame side. In the retracted state, the ridge connected to the projecting member bends downward, and the closing member connected to this spring projects downward, so that the lower edge of the door and the floor surface are separated. The gaps formed between them are closed to prevent drafts and improve sound insulation.

When the door is opened, the contact state of the protruding member with the door frame side is released by the rotation of the door, so that the spring extends due to its elasticity, and the closing member connected to the spring is opened. By raising it, the closed state of the gap is released and the door can be opened and closed smoothly. Also, when the door is closed, the protruding member comes into contact with the door frame or a member provided on the door frame side for retracting operation, whereby the spring bends downward, whereby the closing member. Project downwards and close the gap between the floor and.

At this time, since the center of the flexure of the spring is displaced from the center position of the door in the width direction toward the suspension side, the flexure of the spring causes the center of the closing member to move. From this point, the position closer to the suspension base side is pushed downward, and the load is biased toward the suspension base side of the closing member, so the closing member comes into contact with the floor surface from the suspension base side, and the door tip side. Since the sliding distance of the door becomes shorter and the load applied to the door tip side becomes lighter, the opening and closing of the door will be smoother, and the wear and damage of the closing member will be reduced.

[0012]

【Example】

 Hereinafter, the invention will be specifically described with reference to the drawings.

FIGS. 1 to 4 illustrate an embodiment of a door closing device according to the present invention. In this embodiment, an example in which the closing device is attached to a sub-door of a movable partition is shown. There is.

That is, FIG. 2 shows a movable partition that is used, for example, for dividing a large conference room and using it for a conference of a small number of people, and each partition 21 to 24 is provided in an upper frame 25. It is designed to run horizontally by being suspended on a rail (not shown), and sub-doors (doors) 26 and 27 are freely rotatable via hinges on the two partitions 21 and 22 on the right side of the figure. It is attached to and forms a double door.

Closing members 21a and 22a are attached to the lower end portions of the partitions 21 and 22 excluding the opening for the latent door so as to be vertically movable, and the partitions 21 and 22 are located at predetermined positions. It interlocks with a lock mechanism (not shown) for fixing to, and projects downward from the lower end portion to close a gap formed with the floor surface 28. Further, closing members 23a and 24a having lengths substantially corresponding to the widths of the partitions 23 and 24 are attached to the lower ends of the partitions 23 and 24 having no subdoors, and the partitions 23 and 24 are locked. By interlocking with the mechanism, the airtightness and the sound insulation are secured by closing the gap between the floor 28 and the same as above.

As will be described later, the door closing device 1 according to the present invention is mainly composed of a leaf spring 2 (spring), a closing member 3, and a rod 4 (projecting member). They are attached to the lower ends of 6 and 27, respectively.

That is, FIG. 3A is a vertical cross-sectional view of a portion of the movable partition 21 including the subdoor 26. As shown in an enlarged view of FIG. There is provided a lower frame 26a made of a material having a substantially "U" -shaped cross section that opens downward, and the closing member 3 of the closing device 1 is provided in the lower frame 26a over substantially the entire length of the lower frame 26a. It is vertically movably accommodated and is connected to a lower frame 26a of the sub-door 26 via a leaf spring 2 as will be described later.

As shown in FIG. 3B, tight members 26b, 26b and 3a, 3a made of synthetic rubber are provided on the surfaces of the lower frame 26a and the closing member 3 which face each other, and the tight members 26b, 26b and 3a, 3a are made of synthetic rubber. It comes into contact with the surface to ensure airtightness and sound insulation. Also, cushion materials 3b 1 and 3b made of synthetic rubber are attached to the lower end surface of the closing member 3 so that when the closing member 3 protrudes downward, the close contact with the floor surface 28 is maintained. It is designed to enhance sound insulation and airtightness.

FIG. 1A is a cutaway front view of the lower end portion of the sub-door 26 showing the structure of the door closing device 1, in which the closing member 3 housed in the lower frame 26 a of the sub-door 26 is As shown in an enlarged view in FIG. 4 (a), one end is fixed to the lower frame 26a of the sub-door 26 by a spring stopper 5, and is slidably accommodated in a housing 6 which is also fixed to the lower frame 26a. The other end of the plate spring 2 is connected to the rod 4 via the connecting member 7 and to the substantially central portion of the plate spring 2 via the spring base 8.

The leaf spring 2 is arranged so that the center of deflection thereof (the center in the longitudinal direction) is located at the suspension base side, that is, in the rightward direction in the figure from the center position in the width direction of the sub-door 26. It is installed.

The rod 4 penetrates the front member 9 attached to the suspension-side-side prospective surface of the sub door 26 at the other end of the rod 4 connected to the leaf spring 2 through the connecting member 7, and the sub door. 26 is projected to the side of the partition 21 (door frame) that rotatably supports 26, and in this embodiment, the closed door 21 of the closing member 21a attached to the lower end of the partition 21 in the closed state. It is in contact with the recess 21c of the end piece 21b attached to the end on the 26 side. When the closing member 21a on the partition 21 side moves up and down in conjunction with the lock mechanism, the rod 4 is pressed by the protrusion 21d of the end piece 21b and is provided on the suspension base side of the subdoor 26. It comes and goes from the front material 9. A roller 4a is provided at the tip of the rod 4 for smoothing the retracting operation by contact with the end piece 21a.

The operation of the closure device 1 having the above structure will be described below.

First, after moving each partition 21 to 24 to a predetermined position, the crank handle mounted on the lock operation part 29 provided on the entire surface of each partition 21 to 24 is rotationally operated so that it is not shown. When the partitioning mechanism 21 to 24 is fixed at that position by the lock mechanism, the respective blocking members 21a to 24a project downward in synchronism with this and close the gap with the floor surface 28.

Then, as shown in FIG. 1B and FIG. 4B which is an enlarged view of FIG. 1B, the end piece 21b attached to the closing member 21a on the partition 21 side also moves downward, The projection 21d formed on the end piece 21b pushes the rod 4 protruding from the front end 9 of the subdoor 26 from the front end 9 to the left in the figure to retract and operate the rod 4.

As a result, the leaf spring 2 fixed to the sub-door 26 by the spring stopper 5 on one end side and connected to the rod 4 via the connecting member 7 on the other end side bends downward, so that the spring base 8 The closing member 3 connected to the central portion of the leaf spring 2 is projected downward through the lower end edge of the sub-door 26 and the floor surface 28 as shown by the phantom line in FIG. The gap formed between and can be closed to ensure sound insulation and airtightness.

When the sub-door 26 is opened in this state, the rotation of the sub-door 26 opens the gap between the sub-door 26 and the projection 21d of the end piece 21b, so that the leaf spring 2 is elastic. Thus, the closed state is released when the closing member 3 is pulled in and the closed state is released, so that the sub-door 26 can be smoothly opened and closed.

Further, when the sub-door 26 is closed, as shown in FIGS. 1 (a) and 4 (a), the rod 4 comes into contact with the projection 21d of the end piece 21b again, so that the leaf spring 2 bends downward, and the closing member 3 connected to the leaf spring 2 projects downward and enters a closed state.

At this time, since the leaf spring 2 is attached to the suspension base side with respect to the center of the latent door 26, the position of the closing member 3 closer to the suspension base side is pressed downward, and the load is increased. Since the closing member 3 is biased toward the hanging side of the closing member 3, the closing member 3 comes into contact with the floor surface 28 from the hanging side, which reduces the sliding distance on the door end side and reduces the load applied on the door end side. As a result, the opening and closing of the sub-door 26 becomes smooth and wear and damage of the closing member 3 can be reduced.

When the movable partition 21 is moved, when the sub-door 26 is closed and the crank handle is reversely operated to release the locked state of the partition 21, the closing member 21a is simultaneously opened. As a result, the rod 4 moves away from the projection 21d 1 of the end piece 21b and abuts against the recess 21c as shown in FIGS. 1 (a) and 4 (a), so that the leaf spring 2 is not bent. The blocking member 3 is lifted and the blocked state is released so that the blocking member 3 can move.

Further, the closing device 1 attached to the sub-door 27 of the partition 22 has a similar structure and operates in exactly the same manner.

In this embodiment, an example in which the door closing device 1 is mounted on the sub-door 26 of the movable partition 21 is shown, but the door closing device according to the present invention is not limited to such a sub-door. It goes without saying that it can also be applied to entrance doors and indoor doors leading to the next room or corridor.

Although the leaf spring 2 is illustrated as the spring, the leaf spring is not necessarily limited to a plate-like spring, and may be a spring that bends downward in response to the retracting operation of the rod 4, such as a piano wire. Even a stick-shaped spring can be used. Further, the rod 4 as the projecting member is not particularly limited in shape, and rods other than rod-shaped members can be used.

[0033]

[Effect of device]

 As described above, the door closing device according to the present invention has the above-described structure, in particular, the spring that pushes down the closing member by bending downward is such that the center of the bending is from the center position in the width direction of the door toward the hanging side. Since it is installed so that it is positioned, sufficient pressure contact with the floor can be secured, airtightness and sound insulation performance are not impaired, and the door can be opened and closed smoothly. It is possible to bring about an excellent effect that the blocking member is not worn or damaged.

[Brief description of drawings]

1 (a) and 1 (b) are cutaway front views near a lower end of a subdoor (door) illustrating the structure and operation of a door closing device according to an embodiment of the present invention.

FIG. 2 is a front view showing the entire movable partition equipped with the door closing device shown in FIG.

3 (a) is a vertical cross-sectional view of the movable partition shown in FIG. (B) It is sectional drawing which expands and shows the closing device of the door in the subdoor shown in FIG.

4 (a) and (b) are enlarged views of the door closing device shown in FIGS. 1 (a) and 1 (b), respectively.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door closing device 2 Leaf spring (spring) 3 Closing member 4 Rod (projecting member) 21 Movable partition (door frame) 26 Latent door (door) 28 Floor surface

Claims (1)

[Scope of utility model registration request] 1. A projecting member, which is disposed so as to be retractable from a suspension side of a door to a side of a door frame that rotatably supports the door, and a protruding member that is disposed along a lower end edge of the door to prevent bending. The door is fixed at one end side to the door so that the center is located closer to the suspension side from the center position in the width direction of the door, and is connected to the protruding member at the other end side and is lowered by the retracting operation of the protruding member. A spring that bends to the side, and moves up and down as the spring extends, being connected to a substantially central portion of the spring, and between the lower edge of the door and the floor surface in response to the retracting operation of the protruding member. A door closing device comprising a closing member for closing a gap formed.