WO2009107793A1

WO2009107793A1 - Automatic door closing device for sliding door, sliding door device having the automatic door closing device mounted thereto, and automatic door closing device kit

Info

Publication number: WO2009107793A1
Application number: PCT/JP2009/053723
Authority: WO
Inventors: 保夫風間
Original assignee: 日東工器株式会社
Priority date: 2008-02-29
Filing date: 2009-02-27
Publication date: 2009-09-03
Also published as: JP5462448B2; KR20100126300A; TW201000742A; JP2009228405A; CN101925715B; CN101925715A; TWI477689B

Abstract

An easily mountable automatic door closing device for a sliding door. The device has a flexibly woundable door closing cord (18) mounted to a door frame so as to extend in the opening and closing direction of the sliding door (20), a rotating member (32) mounted to the sliding door so as to be rotatable about an axis located at a predetermined position, an engagement holding member (36) for engaging the door closing cord with the peripheral surface of the rotating member, and a spring device which, when the rotating member rolls on the door closing code as the sliding door is moved from a door-closed position to a door-open position, accumulates in the spring device an urging spring force for rotating the rotating member in the direction opposite the direction in which the rotating member rolls.

Description

Sliding door automatic closing device, sliding door device to which the automatic closing device is attached, and automatic closing device kit

The present invention relates to an automatic door closing device for a sliding door.

There are several types of devices that automatically close an open sliding door. One type of device is a linear rack set horizontally in the upper horizontal frame of the door frame and a sliding door. Some include a door closing driving device that is fixed and operatively connected to the rack to drive the door to close when the door is opened. Specifically, the door-closing drive device includes a casing fixed to the sliding door, a gear that is rotatably attached to the casing and meshes with the rack and rolls along the rack as the sliding door is opened and closed. A holder for maintaining the engagement between the rack and the gear through the rack between the gear and a spring for closing the sliding door as the gear rolls along the rack when the sliding door is opened. A spring device that stores power, and a braking device that applies a brake when the sliding door that has been opened and a human hand is released is closed by the spring device. (For example, see Patent Document 1)

This type of automatic door closing device normally uses the flexibility of a rack formed of metal or hard plastic, and even if the sliding door moves up and down during opening and closing, the rack elastically deforms accordingly and meshes with the gear. To prevent the sliding door from being opened or closed.
JP 11-152955 A

However, in such a type of automatic door closing device, basically a linear rack needs to be set horizontally. Further, the door closing drive device is provided in the sliding door so that the lock insertion path for passing the rack formed between the gear and the holder is horizontal so that the rack is horizontally passed between the gear and the holder. Need to be fixed.

However, such setting work is difficult, and in particular, it is extremely difficult for an ordinary person to purchase and install such an automatic door closing device on a sliding door already installed at home. If the rack and the door closing drive device are not mounted horizontally, even if the rack is flexible as described above, it is likely to hinder the smooth opening and closing of the sliding door. For this reason, in the apparatus disclosed in the above-mentioned patent document, the vertical movement of the sliding door can be accommodated by attaching both ends of the rack so as to be movable up and down. However, for example, when the door-closing drive device is attached so as to pass through the rack at an angle, it also tends to hinder smooth opening and closing of the sliding door.

In view of these points, the present invention is easy to install and can be easily installed by a general person. The member corresponding to the rack (in the present invention, the door driving cord is used) and the door driving device are horizontal. It is an object of the present invention to provide an automatic opening / closing device for a sliding door which can be opened / closed without any problem even if the sliding door is not set.

That is, the present invention is an automatic door closing device (10) of a sliding door (in the embodiment described below, indicated by reference numeral 20, the same applies hereinafter),
A door-driving cord (18) that does not substantially extend in the length direction and is flexible so that it can be wound. A door closing drive cord (18) in which the portion (24) and the door opening position side end (26) are attached to one of the sliding door and the door frame;
A closing drive device (22) fixed to the other of the sliding door and the door frame, the rotating member (32) attached to the other of the sliding door and the door frame so as to be rotatable around an axis at a predetermined position. And an engagement holding member that engages the door-driving cord with the peripheral surface of the rotating member so that the rotating member rolls on the door-driving cord as the sliding door is opened and closed. 36), and the rotating member rolls on the door driving cord with relative movement between the door driving cord and the door driving device when the sliding door is moved from the door closing position toward the door opening position. Accordingly, there is provided an automatic door closing device for a sliding door having a door closing drive device (22) having a spring device for accumulating a spring urging force for rolling the rotating member in a direction opposite to the rolling.

In this automatic door closing device, the closing drive cord does not substantially extend in the length direction and is flexible so that it can be wound, so when the cord is set in the sliding door closing direction. In addition, unlike the above-described conventional device, it is not always necessary to set it exactly parallel to the opening / closing direction. That is, even when the cord is in a relaxed state, for example, the cord is engaged with the rotating member by the engagement holding member and is flexible enough to be wound. Therefore, it does not interfere with the smooth opening and closing of the sliding door. Further, even if the cord is set obliquely, the cord is flexible, so that it does not hinder the rolling of the rotating member along the cord. The same applies to the setting of the door closing drive.

Therefore, compared with the above-described conventional automatic door closing device, its installation is extremely easy and can be easily set by ordinary people.

Specifically, the door closing drive cord can be loosened and attached to one of the sliding door and the door frame. By providing the door-driving drive cord with a certain degree of looseness, it is not necessary to strictly position and attach the door-driving device, and it can be set easily.

The door driving cord is attached to the door frame, and the opening position side end of the door driving cord is attached to the door frame via a member such as a coil spring (44) that can expand and contract in the opening / closing direction of the sliding door. Can be. Alternatively, the door-driving cord can be attached to the sliding door, and the door-position side end of the door-closing driving cord can be attached to the sliding door via a member that can be expanded and contracted in the sliding door opening and closing direction.

In this way, the door closing drive cord can be easily attached to the door frame without loosening in the opening / closing direction of the sliding door, and the door closing drive cord, the rotating member of the door closing drive device, and the engagement holding Even if the alignment with the member is not necessarily perfect, it can be adapted without difficulty.

Further, the door driving cord (18) has rack teeth (28) provided at a constant pitch along the length direction thereof, and the peripheral surface of the rotating member is provided at a pitch engaging with the rack teeth. Can have teeth.

Instead of providing rack teeth as described above, the peripheral surface of the rotating member and the door-driving drive cord can be frictionally engaged.

Further, the closing drive device has a casing that is removably fixed to a sliding door or a door frame to which the door is attached, and the casing houses the rotating member, the engagement holding member, and the spring device, The door-closing drive device can be attached to the sliding door as an integral unit. Specifically, the casing has an opening / closing direction side wall of the sliding door, and is an opening for passing a cable through the side wall, the opening having a size that does not hinder the bending that may occur when setting the automatic door closing device of the sliding door. Can be.

The present invention also provides a sliding door device having a sliding door and a door frame, to which the automatic closing device as described above is attached.

The present invention further includes
A sliding door automatic closing device kit,
A door-driving cord that does not substantially extend in the length direction and is flexible so that it can be wound. A door driving cord in which the door position side end is attached to one of the sliding door and the door frame;
A casing fixed to the other of the sliding door and the door frame, a rotating member rotatably mounted in the casing and rotatable around a predetermined axis, and an engagement holding member mounted in the casing. The closing drive cord is passed between the engagement holding member and the rotating member, and the closing drive cord is engaged with the peripheral surface of the rotating member, whereby the closing drive cord is An engagement holding member for rotating the rotation member around the predetermined axis when displaced between the rotation member and the engagement holding member in the length direction of the door closing drive cord; The door closing drive cord is mounted in the casing, and is displaced between the rotating member and the engagement holding member to a predetermined one in the length direction of the door closing driving cord. Roll on the door drive cord In with, and a closing drive device having a spring device for prestressing the spring force to roll the rotary member to said transfer motion in the opposite direction,
An automatic door closing device kit for a sliding door is provided in which a portion extending outward from the casing of the door-driving driving cord is wound.

Specifically, the portion of the door-driving cord that extends outward from the casing is bent so that the door-driving cord is wound as a whole by at least one turn.

Since the door-driving drive cord is wound, the kit can be assembled in a small size, making it easier to distribute and sell.

The door closing drive cord may be constituted by a coil spring at one end thereof.

Furthermore,
Distributing as having a support sheet on which the door-driving cord and the door-driving device are mounted, and a cover material that covers the door-driving cord and the door-driving device on the support sheet and is attached to come into contact with the support sheet It can also be easier to sell. Specifically, the cover material is transparent.

In the present invention, furthermore,
Prepare the automatic closing device kit as above,
Fix the casing of the door drive device to one of the sliding door and door frame,
In the state where the sliding door is closed, the door closing position side end of the door closing driving cord is fixed to the other of the sliding door and the door frame,
The door closing drive cord is extended in the opening and closing direction of the sliding door, and the automatic door closing device kit is set to the sliding door and the door frame so that the opening side end of the door driving coat is fixed to the other of the sliding door and the door frame A method for setting the automatic door closing device kit is provided.

By fixing the door closing drive device and appropriately displacing the door closing drive cord in the opening / closing direction with respect to the door closing drive device, the door closing drive cord can be set easily and appropriately.

Another method is to prepare an automatic door closing device kit as described above,
Fix the closing position side end of the closing drive cord to one of the sliding door and door frame,
In the state where the sliding door is closed and extended in the opening direction of the sliding door from the closing position side end where the door driving cord is fixed, the casing of the door driving device is fixed to the other of the sliding door and the door frame,
The automatic closing device kit is fixed to the sliding door and the door frame in such a manner that the door closing drive cord is extended from the closing position side end to the opening position side end and fixed to the sliding door and the door frame. It can also be set.

In this case as well, the closing drive device can be positioned appropriately with the closing position side end of the closing drive cord fixed to one of the sliding door and the door frame, so that easy and proper setting is possible.

In the present invention, the automatic door closing device (22) is further
The spring device is
A shaft that is coaxial with the rotating member;
When a spring is connected to the shaft body, wound around the shaft body and connected to the inner wall surface of the rotating member at the other end, and the sliding door is moved from the closed position to the open position A spring spring that rolls around the shaft body by the rotating member that rolls on the door-driving cord and rotates relative to the shaft body;
A spring biasing force adjusting member (152) fixed to one end of the shaft body, having a substantially circular outer peripheral surface, and having a plurality of engaging recesses (154) provided at intervals in the circumferential direction;
The shaft body is rotated at a predetermined position by elastically engaging the engagement recess (154) on the outer peripheral surface of the spring biasing force adjusting member (152) provided at a predetermined position of the door closing drive (22). Rotation prevention members (142) and (242) held in position can be provided.

With this configuration, it is possible to easily and easily adjust the spring force accumulated in the spring device even after the automatic door closing device is assembled, while further reducing the weight.

Further, in the present invention, as a specific configuration of the embodiment provided with the above rotation prevention member,
The rotation preventing member (142) is an elongated spring member extending so as to contact the rotating member, and both ends thereof are fixed to the door-closing drive device, and are directed to the spring biasing force adjusting member (152) at an intermediate position. And a spring member having an engaging portion (142-1) elastically engaged with the engaging recess 54,
The rotation preventing member (242) is an elongated spring member having one end fixed to the door closing drive device and extending toward the other end adjacent to the spring biasing force adjusting member, and the spring biasing force adjustment at the other end. A spring member having an engaging convex portion (242-1) protruding toward the outer peripheral surface of the member (152) and elastically engaging with the engaging concave portion (154) can be provided.

Moreover, in the present invention,
Adjacent to the spring biasing force adjusting member (152), it is rotatable around an axis parallel to the shaft body, and engages with the spring biasing force adjusting member (152) to prevent the spring spring from being caught too much. An overwinding prevention member (158)
The spring biasing force adjusting member (152) has one convex portion (164) on its outer peripheral surface,
The overwinding prevention member (158) has a plurality of recesses (162) provided on the outer peripheral surface thereof at predetermined intervals in a predetermined angular range in the circumferential direction.
Each time the spring biasing force adjusting member (152) makes one rotation, the convex portion (164) sequentially engages with the concave portion (162) to rotate the over-winding prevention member (158) by one increment. After engaging with the recess (162), the spring biasing force adjustment is performed by engaging the convex portion (164) of the spring biasing force adjusting member (152) with the outer peripheral surface of the overwinding prevention member (158). Further rotation of the member (152) can be prevented.

By providing the overwinding prevention member in this way, it is possible to efficiently prevent the spring biasing force adjustment member from being overwound and to use the apparatus in a stable state.

The present invention further provides:
The convex portion (164) is provided with a spring member passage concave portion (168), and the spring biasing force adjusting member rotates so that the convex portion (164) becomes the engaging portion (142-1) of the spring member. The spring member passing recess (168) passes around the engaging portion (142-1) of the spring member (142) and passes through the engaging portion (142-1) of the spring member (142). It is possible to prevent the rotation of the spring biasing force adjusting member (52) from being disturbed by contact with (142-1).

Thereby, when the spring biasing force adjusting member rotates, an excessive load is not applied to the spring member, so that the apparatus can be used stably and the apparatus can be used for a long time. .

Further, at least a part of the anti-winding member (158) is in contact with the over-winding prevention member (158), and the over-winding prevention member (158) can be provided with a rotational force resistance member (166) for imparting resistance to the rotation. .

The overwinding prevention member (658) is fitted around the second shaft body provided along the axis, and is frictionally engaged with the peripheral surface of the shaft body (658). -1), and can be rotated around the second shaft body.

The inner peripheral surface (658-1) has a circular shape as a whole, and extends at least part of the circular inner peripheral surface radially inward from the inner peripheral surface. It is possible to have a rotational force resistance member (684) that frictionally engages with the peripheral surface of the.

Specifically, the inner peripheral surface has a plurality of concave portions (684-2) provided at predetermined intervals in the circumferential direction, and the concave portions are located radially outward from the inner peripheral surface. A protrusion having a bottom surface facing inward in the radial direction, projecting inward in the radial direction from the bottom surface, and having a tip end portion positioned at an inner position of the inner peripheral surface and press-engaged with the second shaft body It is possible to have a portion (684-1), and the convex portion (684-1) constitutes the rotational force resistance member (684).
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which shows the outline | summary of the sliding door apparatus which attached the automatic door closing apparatus which concerns on this invention, the figure which looked at the automatic door closing apparatus from the front on the right, and the figure which looked at the automatic door closing apparatus from the side on the left. 1 shows a first embodiment of an automatic door closing device according to the present invention, and shows the inside of the door closing drive device except for the side wall in front of the casing of the door closing drive device. It is the figure which looked at the automatic door closing device of Drawing 2 from the upper part. It is a figure which shows the example in case the closing drive cord does not pass linearly with respect to the closing drive device in the automatic closing device of FIG. FIG. 3 is a view similar to FIG. 2, showing a second embodiment of the automatic door closing device according to the present invention. It is a figure which shows the kit of the automatic door closing apparatus which concerns on this invention. FIG. 3 is a view similar to FIG. 2, showing a third embodiment of the automatic door closing device according to the present invention. FIG. 8 is an AA cross-sectional view of the automatic door closing device shown in FIG. FIG. 9 is a partially enlarged view of FIG. 8. 4 shows a fourth embodiment of an automatic door closing device according to the present invention, which is similar to FIG. 2. FIG. FIG. 9 is a view similar to FIG. 2, showing a fifth embodiment of the automatic door closing device according to the present invention. 6 shows the sixth embodiment of the automatic door closing device according to the present invention, and is a view showing only a spring biasing force adjusting member, a spring member, and an overwinding preventing member. FIG. FIG. 13 is a view similar to FIG. 12, showing a seventh embodiment of the automatic door closing device according to the present invention. FIG. 13 shows an eighth embodiment of the automatic door closing device according to the present invention and is a view similar to FIG. 12. 9 shows a ninth embodiment of an automatic door closing device according to the present invention, which is similar to FIG. FIG. 10 shows a tenth embodiment of an automatic door closing device according to the present invention, in which (a) is a view showing another aspect of the overwinding prevention member, and (b) is a BB cross-sectional view thereof.

FIG. 1 shows a sliding door device 12 to which a sliding door automatic closing device 10 according to the present invention is attached.

As illustrated, the automatic door closing device 10 includes a door closing drive cord 18 having a door closing position side end 24 and a door opening position side end 26 fixed to the upper frame portion 16 of the door frame 14, and a sliding door 20. And a door driving device 22 that is operatively connected to the door driving cord 18.

The closing drive cord 18 does not substantially extend in the length direction, is flexible enough to be wound, and extends in the opening / closing direction (horizontal direction in the illustrated example) of the sliding door 20. The door closing position side end 24 and the door opening position side end 26 at both ends are attached to the upper frame portion 16. Flexibility to the extent that it can be wound is opened and closed because it is made elongated like a rack made of synthetic resin or metal as disclosed in the above-mentioned JP-A-11-152955. It does not mean that the sliding door is flexible enough to move up and down, but it means that the sliding door is flexible enough to be wound up to a diameter of several tens of centimeters, for example. In the prototype made by the inventor of the present application, by using a flexible rack that can be wound to a diameter of about 30 cm, an automatic door closing device that is extremely easy to install and that can be smoothly opened and closed is used. I was able to.

As shown in FIG. 2, the door closing drive cord 18 is specifically composed of a core wire such as steel and a hard resin layer provided around the core member, and the door for driving the door closing is provided on the resin layer. The rack teeth 28 may be formed at a constant pitch along the length direction of the cord. Eyelets or the like can be attached to the closing position side end 24 and the opening position side end 26 and attached to the upper frame portion 16 with screws or the like.

The closing door driving device 22 is related to the casing 30 fixed to the sliding door 20, the gear 32 as a rotating member rotatably attached to the casing, and the rack teeth 28 of the closing drive cord 18 to the teeth 34 of the gear 32. And an engagement holding member 36 that allows the gear 32 to roll along the door closing drive cord 18 as the sliding door 20 is opened and closed, and is provided inside the gear 32 so as to be concentric with the gear. A spring biasing force that causes the gear 32 to roll in a direction opposite to the rolling movement of the gear 32 when the sliding door 20 is moved from the door closing position toward the door opening position is provided. And a spring device in which the mainspring 37 stores energy.

Specifically, in the spring device, one end of the spring spring 37 is connected to a shaft body (not shown) provided coaxially with the gear 32, and the other end is connected to the inner peripheral surface of the gear 32. As shown in FIG. 2, the shaft body is held at a predetermined angular position by engaging the spring member 42 with a hexagonal spring biasing force adjusting member 52 fixed to the end on the near side. It has become. That is, the spring biasing force adjusting member 52 rotates the shaft body by rotating the shaft body by engaging the tip of the driver with a linear groove 52-1 provided in the central portion thereof, and around the shaft body. The degree of entrainment of the mainspring is adjusted. The spring member 42 is U-shaped, and both ends and a central portion thereof are fixed to the casing 30, and two linear portions 42 ′ are engaged with two opposing surfaces of the hexagonal outer peripheral surface of the spring biasing force adjusting member 52. By doing so, the spring biasing force adjusting member is held at a required rotational position.

As shown in FIGS. 2 and 3, the casing is provided with openings 33 for passing the door closing drive cords 18 on the left and right walls. The openings extend to the upper wall of the casing and are used for door closing driving. The cord 18 does not interfere with the bending that may occur when the sliding door automatic closing device is attached. The tooth width of the gear 32 is preferably wider than the width of the rack teeth so as to achieve stable engagement between the gear 32 and the rack teeth.

The engagement holding member 36 may be formed as a part of the casing 30 or may be fixed to the casing as a separate body. The engagement driving member 36 has a U-shape with a downward cross section and sandwiches the closing drive cord 18 from both sides. It is preferable to hold in this manner. By doing in this way, as shown in FIG. 4, even if the door closing drive cord 18 is set so as not to pass through the door closing drive device 22 in a horizontal view as shown in FIG. Therefore, the door closing drive device can be moved smoothly. Further, the engagement holding member 36 can be rotatably attached to the casing as a roller-shaped member so as to reduce friction with the door closing drive cord as much as possible.

In the illustrated example, the door closing drive device 22 has a gear 38 meshed with the gear 32, and when the gear 32 is rotated in accordance with the movement of the sliding door 32 toward the door closing position, the rotation is braked. A braking device 40 is provided. This braking device is disclosed in, for example, the above-mentioned Japanese Patent Application Laid-Open No. 11-152955 and is well known to those skilled in the art, and thus detailed description thereof is omitted.

FIG. 5 shows a modification of the embodiment shown in FIG.

That is, in this embodiment, the coil spring 44 is attached to the opening position side end portion 26 of the door closing drive cord 18, and the opening position side end portion 26 is attached to the upper frame portion 16 via the coil spring. It has been.

By doing so, the cord can be set without sagging by attaching the door-driving cord to the upper frame with the coil spring slightly extended. Further, the mounting position is not limited by the coil spring, and can be easily installed.

Although the embodiment of the present invention has been described, the present invention is not limited to this. For example, a gear as a rotating body may be a V-shaped pulley, and a closing drive cord may be a V-belt. Is possible.

FIG. 6 shows a kit 46 of the automatic door closing device for the sliding door described above. In other words, this kit includes the door closing drive cord 18 and the door closing drive device 22, and a portion of the door closing drive cord 18 extending from the casing 30 is wound, and as a whole, at least one turn is wound. It is supposed to be in a state. In a specific example, the diameter of this winding is approximately 30 cm. Further, this kit is in close contact with the support sheet 48 so as to cover the support sheet 48 on which the door closing drive cord 18 and the door closing drive device 22 are placed, and the door closing drive cord 18 and the door closing drive device 22 on the support sheet 48. And a cover member (not shown) attached in this manner. The cover material is preferably transparent so that the inside can be seen.

To set this automatic door closing device kit for sliding doors and door frames, proceed as follows.

First, the casing 30 of the door closing drive device 22 is fixed to one of the sliding door and the door frame, and the door closing position side end 24 of the door closing driving cord 18 is fixed to the other of the sliding door and the door frame in a state in which the sliding door is closed. . Next, the closing door driving cord 18 is extended in the opening / closing direction of the sliding door 20, and the opening side end 24 of the closing door driving coat is fixed to the other of the sliding door and the door frame.

In this case, the door closing drive device 22 can be appropriately moved along the door closing drive cord 18 after fixing the door closing position side end 24 of the door closing driving cord 18, so that it is set to an appropriate position. Can do.

As another method, the door closing position side end 24 of the door closing drive cord 18 is fixed to one of the sliding door and the door frame, the sliding door 20 is closed, and the door closing driving cord 18 is fixed from the fixed door closing position side end. In a state where the sliding door is extended in the opening direction, the door closing driving device 22 is moved along the door closing driving cable, the casing is fixed to the other of the sliding door and the door frame at an appropriate position, and then the door closing driving cord 18 is moved. Is fixed to the sliding door and the one of the door frames in a state of extending from the door closing position side end to the door opening position side end.

Also in this case, the door closing drive device 22 can be fixed after being appropriately displaced with respect to the door closing drive cord 18 with the end on the door closing position side fixed, and can be set to an appropriate position.

7 to 9 show a door closing drive device 22 according to another embodiment of the present invention.

Hereinafter, although this embodiment will be described, the basic configuration is the same as the apparatus shown in FIGS. 1 to 4 described above, and the same members are denoted by the same reference numerals, and the description thereof is omitted.

The door closing drive device 22 is different from the devices shown in FIGS. 1 to 4 in that a spring biasing force adjusting member 152 and a spring member 142 as a rotation preventing member for holding the spring biasing force adjusting member at a required angular position. And a substantially circular overwinding prevention member 158 provided adjacent to the spring biasing force adjustment member 152.

That is, the spring biasing force adjusting member 152 has a substantially circular outer peripheral surface, and a plurality of engaging recesses 154 are provided on the outer peripheral surface at predetermined intervals in the circumferential direction.

The spring member 142 is a rod-shaped spring material set so as to contact the spring force adjusting member 152. An engaging convex portion 142-1 as an engaging protrusion is provided at the substantially central portion of the spring member 142, and the engaging convex portion 142-1 is elastically engaged with the engaging concave portion 154. The force adjusting member 152 is held at a required angular position.

The overwinding prevention member 158 is for preventing the spring spring inside the gear 32 from being overwound, and is rotatable around an axis parallel to the shaft body. The circular outer circumferential surface has a predetermined angle in the circumferential direction. A plurality of recesses 162 are provided at equal intervals in the range. Correspondingly, the spring biasing force adjusting member 152 is provided with one convex portion 164 on its peripheral surface, and the convex portion 164 is engaged with the concave portion 162 each time the spring biasing force adjusting member is rotated once. In combination, the overwinding prevention member 158 is rotated by a predetermined angle.

When the spring urging force adjusting member 152 is rotated a predetermined number of times, the outer peripheral surface of the overwinding preventing member 158 has no concave portion 162 with which the convex portion 164 engages. The overwinding prevention member prevents the rotation and prevents the spring spring from being overwound.

As shown in FIG. 8, the spring urging force adjusting member 152 has a central portion protruding into an opening provided in the wall of the casing 30 so that the linear groove 152-1 is exposed to the outside. ing. The overwinding preventing member 158 is rotatably attached around a shaft portion 30-1 as a second shaft body provided on the wall of the casing. Further, an O-ring 166 as a rotational force resistance member is provided between the overwinding prevention member 158 and the shaft portion 30-1, and a resistance force in the rotational direction of the overwinding prevention member due to frictional force is applied. Yes. As a result, even when the concave portion 162 of the overwinding prevention member 158 is disengaged from the engagement convex portion 142 of the spring biasing force adjusting member 152, the overwinding prevention member 158 is stationary without rattling in the rotational direction.

Moreover, as shown in FIG. 9, the convex part 164 has a semicircular concave part 168 formed at the center in the width direction. This is to allow the concave portion 168 to pass over the engaging convex portion 142-1 when the convex portion 164 passes through the engaging convex portion 142-1 of the spring member 142. .

It should be noted that both

end portions

24 and 26 of the closing drive cord 18 are attached to the position adjusting member 172, respectively. The position adjustment member 172 has a plurality of recesses arranged in the vertical direction, and adjusts the height of the end portions by hooking the

end portions

24 and 26 to appropriate recesses.

FIG. 10 shows a door closing drive device according to still another embodiment of the present invention, which is not the O-ring 166 shown in FIG. A leaf spring 174 that is engaged with the outer peripheral surface of the overwinding prevention member is used. In this respect, unlike the embodiments shown in FIGS. 7 to 9, the other points are the same.

FIG. 11 shows a door closing drive device according to still another embodiment of the present invention, which is different from the embodiment shown in FIG. 7 in a spring member 242 as a rotation preventing member. That is, one end of the spring member 242 is fixed to the casing and is bent at about 90 °, and the other end is provided with an engaging portion 242-1 that engages with the engaging recess 154. . In this respect, unlike the embodiments shown in FIGS. 7 to 9, the other points are the same.

FIG. 12 shows a door closing drive device according to still another embodiment of the present invention, and this device is different from the embodiment shown in FIG. 7 in a spring member 342 as a rotation preventing member. In other words, the spring member 342 is provided with two rod-shaped spring materials whose both ends are fixed to the casing at positions facing each other with the spring biasing force adjusting member 152 interposed therebetween. In this respect, unlike the embodiments shown in FIGS. 7 to 9, the other points are the same.

FIG. 13 shows a door closing drive device according to still another embodiment of the present invention, and this device is different from the embodiment shown in FIG. 7 in a spring member 442 as a rotation preventing member. That is, the spring member 442 is a U-shaped spring material whose both ends and a central portion are fixed to the casing. The spring force adjusting member 152 is sandwiched between the straight portions of the U-shaped spring material, An engaging projection 442-1 provided at the center is engaged with the engaging recess 154. In this respect, unlike the embodiments shown in FIGS. 7 to 9, the other points are the same.

FIG. 14 shows a closing drive device according to still another embodiment of the present invention, in which a leaf spring 474 is provided to engage with the outer peripheral surface of the overwinding prevention member, and the overwinding prevention member has a resistance force. Unlike the embodiment shown in FIG. 13, the other points are the same.

FIG. 15 shows a door closing drive device according to still another embodiment of the present invention. This device includes a spring biasing force adjusting member 552, a spring member 542 as a rotation preventing member, and an overwinding preventing member 558. 7 different from the form shown in FIG. That is, the spring urging force adjusting member 552 has a hexagonal outer peripheral surface, and the spring member 542 is formed into an M shape by bending a single bar-shaped spring material three times, and both ends are fixed and folded. The curved parts are also fixed. The spring biasing force adjusting member 552 has two opposing surfaces engaged with the spring member 542. The overwinding prevention member 558 is substantially circular, and has a plurality of concave portions 562 that engage with the respective apex portions of the hexagonal spring biasing force adjusting member 552 over the entire outer peripheral surface thereof. In addition, one protrusion 582 is provided on the outer peripheral surface, and when the spring biasing force adjusting member 552 engages with the protrusion 582, the rotation is stopped. In these points, unlike the embodiments shown in FIGS. 7 to 9, the other points are the same.

16 (a) and 16 (b) show an overwinding prevention member used in a door closing drive device according to still another embodiment of the present invention. The overwinding prevention member 658 of this embodiment can be used in place of the overwinding prevention member 158 and the O-ring 166 in the door closing drive device of the embodiment shown in FIG.

The overwinding prevention member 658 is formed on the inner circumferential surface 658-1 which is circular as a whole and is fitted to the shaft portion (30-1 shown in FIG. 8) of the casing as the second shaft body. Three rotational force resistance members 684 that impart resistance to the rotation to the 658 are provided at three equal intervals. Each rotational force resistance member 684 protrudes inward in the radial direction from the bottom surface of the recess (684-2) provided in the inner peripheral surface 658-1, and the tip portion thereof becomes the inner position of the inner peripheral surface 658-1. The convex portion (684-1) is configured to be press-engaged with the second shaft body. By having this rotational force resistance member, a resistance force in the rotational direction of the overwinding prevention member due to frictional force is applied.

Claims

An automatic closing device for a sliding door,
A door-driving cord that does not substantially extend in the length direction and is flexible so that it can be wound, wherein the door-driving cord extends in the opening / closing direction of the sliding door, and the sliding door and the door frame A door-driving driving cord having an opening position side end and a closing position side end attached to one of the
A door driving device fixed to the other of the sliding door and the door frame, wherein the driving device is rotatably attached around an axis extending in a direction perpendicular to the opening / closing direction of the sliding door at a fixed position of the sliding door and the door frame with respect to the other. A rotating member that engages with the peripheral surface of the rotating member, and the rotating member rolls on the closing drive cord as the sliding door is opened and closed. When the joint holding member and the sliding door are moved from the door closing position toward the door opening position, the rotating member moves on the door driving cord with relative movement between the door driving cord and the door driving device. An automatic door closing device for a sliding door comprising: a door drive device having a spring device including a member that accumulates a spring urging force that is moved by movement to roll the rotating member in a direction opposite to the rolling.
It has a member which is connected to the opening position side end of the door closing drive cord and can be expanded and contracted in the opening and closing direction of the sliding door, and the opening position end is connected to the sliding door and the door frame via the expandable member The automatic door closing device for sliding doors according to claim 1, wherein the automatic door closing device is attached to one or the other.
The automatic door closing device for a sliding door according to claim 2, wherein the extendable member is a coil spring.
The door closing cord has rack teeth provided at a constant pitch along the length direction thereof, and the peripheral surface of the rotating member has teeth provided at a pitch engaging with the rack teeth. The automatic door closing device for a sliding door according to any one of claims 1 to 3.
The closing drive device has a casing that is removably fixed to the sliding door or door frame to which the door is attached, and the casing holds the rotating member, the engagement holding member, and the spring device. The automatic door closing device for a sliding door according to claim 4.
The automatic door closing device for a sliding door according to any one of claims 1 to 3, wherein the peripheral surface of the rotating member and the door closing drive cord are frictionally engaged.
The closing drive device has a casing that is removably fixed to the sliding door or door frame to which the door is attached, and the casing houses the rotating member, the engagement holding member, and the spring device. The automatic door closing device for a sliding door according to any one of claims 1 to 3.
The casing has an opening / closing direction side wall of the sliding door, and an opening for passing the cable through the side wall having a size that does not prevent the bending that may occur when setting the automatic door closing device of the sliding door. The automatic door closing device for a sliding door according to claim 7.
A sliding door device having a sliding door and a door frame, to which the automatic door closing device according to any one of claims 1 to 3 is attached.
A sliding door automatic closing device kit,
A door-driving cord that does not substantially extend in the length direction and is flexible so that it can be wound, wherein the door-driving cord extends in the opening / closing direction of the sliding door, and the sliding door and the door frame A closing drive cord having both ends attached to one of the
A casing fixed to the other of the sliding door and the door frame, a rotating member that is rotatably attached to the casing and that is rotatable around an axis extending in a direction perpendicular to the opening / closing direction of the sliding door, and attached to the casing An engagement holding member, wherein the door closing drive cord is passed between the engagement holding member and the rotating member, and the door closing driving cord is engaged with the peripheral surface of the rotating member, When the door closing drive cord is displaced between the rotating member and the engagement holding member in the length direction of the door closing driving cord, the rotating member is rotated around the axis. The engagement holding member and the casing are attached to the casing, and the door closing drive cord is displaced between the rotating member and the engagement holding member to a predetermined one in the length direction of the door closing drive cord, thereby The rotating member rotates Along to that, the rotary member and a closing drive device having a spring device for prestressing the spring force to roll in the opposite direction to the rotation,
An automatic door closing device kit for a sliding door in which a portion extending outward from the casing of the door closing drive cord is wound.
The automatic door closing of the sliding door according to claim 10, wherein a portion of the door driving cord extending outward from the casing is bent so that the door driving cord is wound as a whole by at least one turn. Equipment kit.
The automatic door closing device kit according to claim 10 or 11, wherein the door closing drive cord has one end portion constituted by a coil spring.
A support sheet on which the door-driving cord and the door-driving device are placed; and a cover material attached to the support sheet so as to cover the door-driving cord and the door-driving device on the support sheet. The automatic door closing device kit according to claim 10 or 11, wherein
The automatic door closing device kit according to claim 13, wherein the cover material is transparent.
The spring device is
A shaft that is coaxial with the rotating member;
When a spring is connected to the shaft body, wound around the shaft body and connected to the inner wall surface of the rotating member at the other end, and the sliding door is moved from the closed position to the open position A spring spring that rolls around the shaft body by the rotating member that rolls on the door-driving cord and rotates relative to the shaft body;
A spring biasing force adjusting member fixed to one end of the shaft body;
A rotation preventing member that is provided at a predetermined position of the door closing drive device and elastically engages with an outer peripheral surface of the spring biasing force adjusting member to hold the shaft body at a predetermined rotation position;
The automatic door closing device for a sliding door according to claim 1, comprising:
16. The automatic door closing of a sliding door according to claim 15, wherein the outer peripheral surface of the spring biasing force adjusting member is polygonal, and the rotation preventing member is formed by a spring member elastically engaged with at least one surface of the polygon. apparatus.
The spring biasing force adjusting member has a substantially circular outer peripheral surface, and has a plurality of recesses provided at intervals in the circumferential direction thereof,
16. The automatic door closing device for a sliding door according to claim 15, wherein the rotation preventing member is formed of a spring member having an engaging protrusion that is elastically engaged with the recess.
18. The sliding door according to claim 17, wherein the spring member is an elongated spring member extending so as to be in contact with the rotating member, and both ends thereof are fixed to the door-closing driving device, and the engagement protrusion is provided at an intermediate position. Automatic door closing device.
The one end of the spring member is fixed to the door closing drive device, extends toward the other end adjacent to the spring biasing force adjusting member, and the engagement convex portion is provided at the other end. Automatic door closing device.
An overwinding preventing member that is rotatable around an axis parallel to the shaft body and that is adjacent to the spring biasing force adjusting member and that engages with the spring biasing force adjusting member to prevent the spring spring from being excessively wound. Have
The spring biasing force adjusting member has one convex portion on its outer peripheral surface,
The overwinding prevention member has a plurality of recesses provided on the outer peripheral surface thereof at predetermined intervals in a predetermined angular range in the circumferential direction,
Each time the spring biasing force adjusting member makes one rotation, the convex portion sequentially engages with the concave portion, rotates the over-winding preventing member by a predetermined angle, and engages with the final engaging concave portion. The automatic door closing device for a sliding door according to any one of claims 17 to 19, wherein the spring biasing force adjusting member is prevented from further rotating by engaging with an outer peripheral surface of the overwinding preventing member.
The convex portion is provided with a recess for passing a spring member, and when the spring biasing force adjusting member rotates and the convex portion passes through the engaging portion of the spring member, the convex portion and the spring member 21. The automatic door closing device for a sliding door according to claim 20, wherein the engagement portion does not interfere with rotation of the spring biasing force adjusting member.
21. The automatic door closing device for a sliding door according to claim 20, further comprising a rotational force resistance member that at least partially abuts against the overwinding prevention member and imparts a resistance force against the rotation of the overwinding prevention member.
The overwinding preventing member has an inner peripheral surface that is fitted around a second shaft body provided along the axis and is frictionally engaged with a peripheral surface of the shaft body, 21. The automatic door closing device according to claim 20, wherein the automatic door closing device is rotatable around a shaft body.
The inner peripheral surface has a circular shape as a whole, and at least a part of the circular inner peripheral surface extends radially inward from the inner peripheral surface to be frictionally engaged with the peripheral surface of the second shaft body. 24. The automatic door closing device according to claim 23, further comprising a rotational force resistance member.
The inner peripheral surface has a plurality of concave portions provided at predetermined intervals in the circumferential direction, and the concave portions are located radially outward from the inner peripheral surface and have a bottom surface facing radially inward. And projecting inward in the radial direction from the bottom surface, and having a convex portion whose tip end portion is located at an inner position of the inner peripheral surface and press-engaged with the second shaft body. 25. The automatic door closing device according to claim 24, which constitutes a rotational force resistance member.