JP2004036199A - Opening-section open-close device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening-section open-close device by which a gap between an open-close member and a fixing member at a totally closed place can be made small, by preventing the deformation of the open-close member. <P>SOLUTION: In a movable type roof 20 opening and closing a window installed at a fixed roof, a plurality of wheels 33a to 33k capable of being abutted against rails 12a and 12b respectively are supported rotatably. In the rails 12a and 12b, when the roof 20 is positioned at the totally enclosed place, recessed sections 13a to 13k are formed at placed where there are the wheels 33a to 33k. When the wheels 33a to 33k for the roof 20 fall in the recessed sections 13a to 13k, the gap between the roof 20 and the fixed roof 10 becomes small. Then, each wheel 33a to 33k is divided into a plurality of groups A to D composed of two or more of the wheels. Each wheel 33a to 33k is disposed so that at least each one wheel of each group A to D is not opposed to the recessed sections 13a to 13k when the roof 20 is moved between the totally enclosed place and a totally open place. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an opening and closing device for opening and closing an opening. In particular, the present invention relates to an opening and closing device suitable for opening and closing an opening provided in a ceiling of a building.
[0002]
[Prior art]
In order to adjust the environment such as illuminance and temperature in a building, a method is used in which a window (opening) is formed on a fixed roof of the building and a movable roof (opening / closing member) for opening and closing the window is provided.
For example, a pair of rails are arranged on a fixed roof, and wheels that can roll on each rail are attached to a movable roof. Then, the movable roof is moved along the rail between a fully open position where the opening is fully closed and a fully open position where the opening is fully opened.
[0003]
[Problems to be solved by the invention]
When moving the movable roof (opening / closing member) along the rail, it is necessary to provide a gap between the movable roof and the fixed roof.
On the other hand, when the movable roof is moved to the fully closed position, it is necessary to seal the gap between the movable roof and the fixed roof to prevent rainwater from entering the building and ensure airtightness. .
Here, in the fully closed position, if the movable roof can be moved in the direction of the fixed roof and the gap between the movable roof and the fixed roof can be reduced, the gap between the movable roof and the fixed roof can be reduced. Easy to seal.
However, for example, when the movable roof of a building having a large room is made of glass, the movable roof becomes large and heavy, so that the movable roof is brought into contact with one of the rails by a plurality of wheels. Need to support. When the movable roof is made of glass, the glass may be broken when the movable roof is deformed.
For this reason, conventionally, it was not possible to move the large and heavy movable roof in the direction of the fixed roof in the fully closed position to reduce the gap between the movable roof and the fixed roof.
Accordingly, an object of the present invention is to provide an opening / closing device that can reduce the gap between the opening / closing member and the fixed member at the fully closed position while preventing deformation of the opening / closing member.
[0004]
[Means for Solving the Problems]
A first invention of the present invention for solving the above-mentioned problem is an opening and closing device as described in claim 1.
In the opening / closing device according to the first aspect, the first and second guide members to which the first and second groups of rotating members can abut, respectively, have the first and second guide members when the opening member is located at the fully closed position. A concave portion is provided at a position where each of the rotating members of the first and second groups exists. Thus, at the fully closed position, the opening member can be moved in the direction of the fixing member, and the gap between the opening member and the fixing member can be reduced. At this time, by making the shapes of the concave portions substantially the same, the opening / closing member does not deform when the opening / closing member is moved in the direction of the fixing member. Further, when the opening and closing member moves between the fully-closed position and the fully-opened position, at least two rotating members of the first and second groups, respectively, rotate the first group and the second group. The first guide member and the second guide member are disposed so as not to face the concave portions. Thus, the opening and closing member is always supported by at least two rotating members of the first and second groups while moving between the fully closed position and the fully opened position, so that the rotating member fits into the recess. Nothing. Therefore, when the opening and closing member moves between the fully closed position and the fully opened position, the opening and closing member does not deform.
According to a second aspect of the present invention, there is provided an opening / closing device according to the second aspect.
In the opening / closing device according to claim 2, the first and second guide members to which the rotating members forming the first and second groups can abut, respectively, have the opening member in the fully closed position. The concave portion is provided at a position where each rotating member constituting each group of the first group and the second group when located at the position. This has the same effect as the first invention. In addition, each rotating member and each concave portion of each group of the first group and the second group has at least each of the groups of the first group and the second group when the opening / closing member moves between the fully closed position and the fully opened position. One rotating member is disposed so as not to face a concave portion provided in the first and second guide members. Thus, while moving between the fully closed position and the fully opened position, the opening / closing member is supported within the interval equal to or less than the maximum interval between the rotating members forming adjacent groups, that is, within the set interval. Therefore, even when the opening / closing member is large and heavy, the opening / closing member does not deform when the opening / closing member moves between the fully closed position and the fully opened position.
According to a third aspect of the present invention, there is provided an opening / closing device according to the third aspect.
In the opening / closing device according to the third aspect, contact members are disposed on both sides of the opening in parallel with the moving direction of the opening / closing member, and the opening / closing member contacts the side surface of each contact member. A seal member is provided along a moving direction of the opening / closing member. Thereby, even when the opening / closing member moves to the fixed member side at the fully closed position, the gap between the opening / closing member and the fixed member can be sealed with a simple configuration.
According to a fourth aspect of the present invention, there is provided an opening / closing device according to the fourth aspect.
In the opening / closing device according to the fourth aspect, the seal member contacts both side surfaces of each contact member. Thereby, the gap between the opening / closing member and the fixing member can be more reliably sealed.
According to a fifth aspect of the present invention, there is provided an opening / closing device according to the fifth aspect.
In the opening and closing device according to the fifth aspect, the concave portion is formed on the open side inclined portion formed on the fully opened position side of the opening and closing member, and is formed on the fully closed position side of the opening and closing member, and is larger than the inclination of the open side inclined portion. It has a closed-side inclined portion set to be inclined. Thus, the opening and closing member can be reliably positioned at the fully closed position, and the rotating member can be easily moved between the fully closed position and the fully opened position.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
One embodiment of the present invention is shown in FIGS. In the present embodiment, the present invention is applied to a movable roof device that opens and closes a window provided on a fixed roof by moving the movable roof along a rail provided on the fixed roof of the building. .
1 is a plan view of the present embodiment, FIG. 2 is a view taken along the line II-II of FIG. 1, FIG. 3 is a conceptual diagram of a drive mechanism, and FIG. 4 is a shape and arrangement of recesses provided on rails. FIG.
In the following, the length direction of the rail (the moving direction of the movable roof 20) (the left-right direction in FIG. 1, the front and back direction in FIG. 2) is the "moving direction", and the direction connecting the rails (the vertical direction in FIG. 1). The direction in which the distance between the movable roof and the fixed roof changes (the front-to-back direction in FIG. 1 and the vertical direction in FIG. 2) refers to the “vertical direction”.
[0006]
As shown in FIGS. 1 and 2, windows 11 are provided on a fixed roof 10 provided on a ceiling of a building. A pair of rails 12a and 12b are provided on the fixed roof 10 along the window 11 along the moving direction. Further, the fixed roof 10 is provided with contact members 15a and 15b in parallel (moving direction) with the rails 12a and 12b. The contact members 15a and 15b are formed of, for example, steel.
[0007]
The movable roof 20 that opens and closes the window 11 has a main body 21 that is at least larger than the opening 11.
The main body 21 is formed of a frame and glass attached to the frame (both are not shown). When the main body 21 is made of glass, the inside of the building becomes bright.
[0008]
Further, wheel support portions 31 and 41 are provided at a lower portion of the main body portion 21 (a lower portion in FIG. 2) so as to correspond to the rails 12a and 12b provided on the fixed roof 10.
A wheel 33a is rotatably supported by the wheel support 31 via a support shaft 32a. Similarly, a wheel 43a is also rotatably supported by the wheel support portion 41 via a support shaft 42a. In the embodiment shown in FIG. 2, the outer peripheral portion of the wheel has a substantially U-shaped cross section when viewed from the moving direction.
Although FIG. 2 shows only the support shafts 32a and 42a and the wheels 33a and 43a, a plurality of support shafts and wheels are provided as shown in FIG. 4 (this point will be described later). The wheels supported by the wheel support shaft 31 can abut on the rail 12a (roll on the rail 12a), and the wheels supported by the wheel support shaft 41 can abut on the rail 12b (on the rail 12b). Can be rolled). In the embodiment shown in FIG. 2, a rail is inserted into a concave portion of an outer peripheral portion of a wheel having a substantially U-shaped cross section. This restricts the lateral movement of the wheels and thus the movable roof.
The wheel support portions 31 and 41 may be configured by one support portion that is long in the movement direction, or may be configured by a plurality of support portions along the movement direction. In the case of a configuration including a plurality of support portions, a support portion may be provided for each wheel, or a support portion may be provided for each group described later.
[0009]
Further, on the lower part of the main body 21 (the lower part in FIG. 2), the seal member supporting parts 34, 35, 44, 45 are provided in the moving direction in correspondence with the contact members 15a, 15b provided on the fixed roof 10. Is provided.
The seal member support portions 34 and 35 are provided so as to be located on both sides in the lateral direction with respect to the contact member 15a. The seal members 36 and 37, which can abut on the lateral sides of the contact member 15a, are attached to the seal member holding portions 34 and 35 by attachment means such as bolts and adhesives.
Similarly, the seal member support portions 44 and 45 are provided so as to be located on both sides in the lateral direction with respect to the contact member 15b. The seal members 46 and 47, which can abut on the lateral sides of the contact member 15b, are also attached to the seal member support portions 44 and 45 by attachment means.
The seal members 36, 37, 46, 47 are formed of an elastically deformable elastic material such as ethylene propylene rubber. When the movable roof 20 moves in the moving direction and the vertical direction, since the seal members 36, 37, 46, and 47 are elastically deformable, the seal members 36, 37, 46, and 47 are further elastically deformable. The seal members 36, 37, 46, 47 maintain the state of contact with the contact members 15a, 15b even when they move in the horizontal direction. That is, the sealing action is maintained.
Note that the seal member holding portions 34, 35, 44, and 45 may be configured by one holding portion that is long in the moving direction, or may be configured by a plurality of holding portions.
Further, the contact members 15a, 15b and the seal members 36, 37, 46, 47 are arranged such that the movable roof 20 is fully closed (for example, the position where the window 11 is fully closed as shown by a solid line in FIG. 1) and fully opened. When moving between the positions (for example, the position where the window 11 is fully opened as shown by the dashed line in FIG. 1), the contact state between the seal members 36, 37, 46, 47 and the contact members 15a, 15b. Is preferably maintained.
[0010]
In this embodiment, the fixed roof 10 corresponds to the fixing member of the present invention, the window 11 corresponds to the opening of the present invention, the movable roof 20 corresponds to the opening and closing member of the present invention, and the rails 12a and 12b correspond to the opening and closing members of the present invention. The wheels 33a and 43a correspond to the guide member of the present invention, and the rotating members of the present invention.
[0011]
Next, a drive mechanism of the movable roof 20 will be described. Various drive mechanisms can be used as the drive mechanism for the movable roof 20.
For example, a wheel drive type in which the wheels 33a and 43a are driven by a motor or the like can be used. When this method is used, it is necessary to mount a power supply device on a movable roof or provide a trolley wire on a fixed roof and provide a sliding member sliding on the movable roof with the trolley wire.
Alternatively, it is possible to use a traction drive type that applies a driving force to the movable roof using a traction member such as a traction rope.
In the present embodiment, as will be described later, a concave portion is formed on the surface of the rails 12a and 12b on which the wheels come into contact, and the movable roof is vertically moved in the fully closed position (the movable roof 20 and the fixed roof 10 (In the direction of reducing the gap between the rails), and the recesses formed in the rails 12a and 12b have inclined portions. For this reason, it is preferable to use a traction drive type as the drive mechanism of the movable roof 20.
[0012]
FIG. 3 shows a conceptual diagram of a traction drive type drive mechanism.
The movable roof 20 is provided with a fixing portion for fixing one end side of a traction member, for example, a traction rope. One fixing portion may be provided, or one pair or a plurality of pairs may be provided on both sides in the moving direction. In the driving mechanism shown in FIG. 3, two pairs of fixing portions are provided in the lateral direction. FIG. 3 shows only a pair of fixing portions 51a and 54a.
One ends of the tow ropes 52a, 55a are fixed to the fixing portions 51a, 54a. Similarly, one end sides of the towing ropes 52b and 55b are fixed to another pair of fixing portions (not shown).
The other ends of the pulling ropes 52a, 52b are fixed to winding / rewinding drums 53a, 53b. Similarly, the other ends of the pulling ropes 55a and 55b are fixed to the winding / rewinding drums 57a and 57b via rollers 56a and 56b.
The winding / rewinding drums 53a and 57a on one side are connected by a connecting means such as a belt. Similarly, the other winding / rewinding drums 53a and 57a are connected by connecting means.
Further, the winding / rewinding drum 53a on one side and the winding / rewinding drum 53b (or 57a and 57b) on the other side are connected by a counter shaft 58.
Further, a drive device such as a drive motor is attached to one of the winding / rewinding drums (for example, the winding / rewinding drum 57a).
Thus, by rotating the winding / rewinding drum 57a by the drive motor, the winding / rewinding length of each pair of traction ropes 52a, 55a, 52b, 55b arranged in the lateral direction is made equal. Can be.
[0013]
Next, recesses formed in the rails 12a and 12b will be described with reference to FIG.
For example, in the case where a movable roof that opens and closes a window having a large opening area is made of glass, if the movable roof (for example, a frame body of the main body) is distorted or deformed, the glass attached to the movable roof is broken. there is a possibility. Therefore, when such a movable roof is used, the number of wheels that can abut on each of the rails 12a or 12b is set to three or more, and the movable roof is distorted by setting the interval (support interval) of the wheels within a set interval. And deformation must not occur.
In the present embodiment, as shown in FIG. 4, three or more wheels 33a to 33k are provided as wheels that can contact the rail 12a. Wheels that can contact the rail 12b are also provided.
In this embodiment, wheels that can contact the rail 12a correspond to the first group of rotating members of the present invention, and wheels that can contact the rail 12b correspond to the second group of rotating members of the present invention. I do.
[0014]
Further, in the present embodiment, the movable roof 20 is closed (closed position) in the direction in which the gap between the movable roof 20 and the fixed roof 10 is reduced (vertical direction) (downward in FIGS. 2 and 4). The rails 12a and 12b are formed with recesses on the surfaces of the rails 12a and 12b with which the wheels 33a to 33k can contact.
That is, as shown in FIG. 4, when the movable roof 20 is located at the fully closed position (for example, the position shown by a solid line in FIG. 1), the wheels 12a provided on the movable roof 20 are located on the rail 12a. At positions where the wheels 33a to 33k exist, recesses 13a to 13k into which the wheels 33a to 33k can drop (fall) can be formed.
Each of the recesses 13a to 13k is formed in the same shape. For example, like the concave portion 13a shown in FIG. 4, the closed side inclined portion 13a1 formed on the front closed position side (the left side in FIG. 4) of the movable roof 20, and the flat portion 13a2 forming the bottom of the concave portion 13a. And an open-side inclined portion 13a3 formed on the fully open position side (the right side in FIG. 4) of the movable roof 20. The closed-side inclined portion 13a1 has a large inclination because it acts as a stopper for preventing the wheel 33a that has dropped (falled) into the concave portion 13a from moving to the front closed position side. On the other hand, the open-side inclined portion 13a3 suddenly descends when the movable roof descends (falls) from the upper surface of the rail 12a to the flat portion 13a2 of the concave portion 13a or rises from the flat portion 13a2 of the concave portion 13a to the upper surface of the rail 12a. Alternatively, in order to suppress the ascending and to enable the ascending or descending with a small driving force, the inclination is smaller than the inclination of the closed-side inclined portion 13a1.
For example, the depth of the flat portion 13a2 of the concave portion 13a is set to about 2 cm, and the inclination angle of the open-side inclined portion 13a3 is set to about 6 degrees (the length of the open-side inclined portion 13a3 is about 20 cm).
[0015]
By the way, when the concave portions 13a to 13k are formed in the rails 12a at positions where the wheels 33a to 33k are present when the movable roof 20 is located at the fully closed position, the movable roof 20 is moved between the fully closed position and the fully open position. When moving the wheels, the wheels pass through the positions where the recesses 13a to 13h are formed. Normally, the wheel 33k provided closest to the fully opened direction does not pass through the recess.
Here, for example, when the wheels 33d to 33f simultaneously pass through the positions where the concave portions 13g to 13i are formed, the contact between the wheels 33d to 33f and the rail 12a is released. In such a case, since the distance between the wheels 33c and 33g that are in contact with the rail 12a is increased, the movable roof 20 may be distorted or deformed due to the weight of the movable roof. In particular, when only one wheel is in contact with the rails 12a and 12b, the possibility that the movable roof 20 is distorted or deformed becomes extremely high.
[0016]
In the present embodiment, a plurality of wheels that can respectively contact the rails 12a and 12b are divided into a plurality of groups including two or more wheels. Then, when the movable roof 20 moves between the fully closed position and the fully open position, each wheel that can abut against the rails 12a and 12b so that at least one wheel of each group does not face each recess. Each recess is provided.
In this case, even when only one wheel of each of the adjacent groups comes into contact with the rail, the distance between the wheels contacting the rail is set to be within the set interval. Preferably, the wheels are divided into groups.
In the embodiment shown in FIG. 4, among the wheels 33a to 33k that can contact the rail 12a, the wheels 33a to 33c are in the group A, the wheels 33d to 33f are in the group B, the wheels 33g to 33i are in the group C, and the wheels 33j. , 33k are divided into groups D. Then, while the movable roof 20 is moving between the fully closed position and the fully opened position, at least one wheel of each of the groups A to D is moved between the wheels 33a to 33k and the concave portions 13a to 13k that can contact the rail 12a. They are arranged so as not to face the concave portions 13a to 13k formed in the rail 12a.
The numerical values shown in FIG. 4 show an example in which the wheels 33a to 33k and the recesses 13a to 13k are provided so as to satisfy such conditions.
In addition, as a method of supporting each of the wheels 33a to 33k on the movable roof 20, a method of individually supporting the wheels 33a to 33k or a method of supporting each of the groups may be used.
[0017]
As described above, in the present embodiment, when the movable roof is located at the fully closed position, at the position where each wheel provided on the movable roof is present, a concave portion where each wheel can drop is provided. I have. Thereby, at the fully closed position, the movable roof can be moved in a direction in which the gap between the movable roof and the fixed roof is reduced, and the sealing between the movable roof and the fixed roof is facilitated.
Here, since the concave portion is formed with a closed-side inclined portion having a large inclination toward the fully-closed position, the movable roof can be reliably positioned at the fully-closed position. In addition, since the concave portion is formed with an open-side inclined portion having a small inclination toward the fully open position, the movable roof can smoothly move down from the rail and ascend upward from the fully closed position onto the rail, Distortion and deformation of the movable roof can be prevented.
Further, a plurality of wheels that can contact each rail are divided into a plurality of groups including two or more wheels. When the movable roof moves between the fully closed position and the fully open position, at least one wheel of each group is disposed so as not to face the concave portion. Thereby, when the movable roof moves between the fully closed position and the fully open position, the movable roof is always supported at intervals within the set interval, thereby preventing the movable roof from being distorted or deformed. be able to.
[0018]
The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions are possible.
For example, in the embodiment, the rotating members of the first group and the second group are divided into groups, and when the opening / closing member moves between the fully closed position and the fully opened position, at least one rotating member of each group is attached to each recess. Although each rotating member and each concave portion are provided so as not to oppose each other, the method of arranging each rotating member and the concave portion is not limited to this. For example, when the opening / closing member moves between the fully closed position and the fully opened position, a method in which at least two rotating members of each of the first and second groups are arranged so as not to face each concave portion may be used. Even in this case, since the opening / closing member is supported at at least two places with respect to the first guide member and the second guide member, it is possible to prevent the opening / closing member from being distorted or deformed.
Further, the shapes of the concave portions formed in the first and second guide members are not limited to the shapes shown in FIG.
In addition, although the seal members capable of contacting are provided on both side surfaces of the contact member, a seal member capable of contacting only one side surface of the contact member may be used as the seal member.
Further, as a sealing method before and after the moving direction, a method utilizing contact between the contact member and the seal member, or various known sealing methods can be used.
Further, as a sealing method, an elastic member such as rubber (for example, air tight rubber) is provided on the opening / closing member, and an elastic member such as rubber is provided at a position facing the elastic member provided on the opening / closing member when the opening / closing member is located at the fully closed position. A method of providing a member (for example, air tight rubber) can also be used. In this case, at the fully closed position, when the opening / closing member moves in a direction in which the gap between the opening / closing member and the fixed member decreases, the elastic member provided on the opening / closing member and the fixed member comes into pressure contact with each other. The space between the opening and closing member and the fixing member is automatically sealed.
Further, in the embodiment, the group closest to the fully open position (group D in FIG. 4) is also constituted by two or more rotating members. However, the rotating member closest to the fully open position has a concave portion between the fully closed position and the fully open position. , The group closest to the fully open position may be composed of one rotating member.
Further, although the opening and closing member is guided by the two guide members, the number of the guide members may be three or more. In this case, a rotating member is provided corresponding to each guide member.
Although the case where the opening / closing member made of glass is used has been described, the present invention can be applied to the case where an opening / closing member made of various materials other than glass is used.
Further, the shape and structure of the fixing member and the opening / closing member can be variously changed.
Various drive mechanisms can be used as the drive mechanism of the opening / closing member.
Further, the present invention can be used as an opening and closing device for opening and closing various openings other than windows provided on a fixed roof of a building.
[0019]
【The invention's effect】
As described above, by using the opening and closing device according to claims 1 to 5, it is possible to reduce the gap between the opening and closing member and the fixed member at the fully closed position while preventing the deformation of the opening and closing member. it can.
[Brief description of the drawings]
FIG. 1 is a plan view of an embodiment of the present invention.
FIG. 2 is a view taken along line II-II in FIG.
FIG. 3 is a conceptual diagram of a driving mechanism according to an embodiment of the present invention.
FIG. 4 is a diagram showing a configuration and an arrangement state of a concave portion according to an embodiment of the present invention.
[Explanation of symbols]
10 Fixed roof (fixed member)
11 windows (openings)
12a, 12b rail (guide member)
15a, 15b Contact member 20 Movable roof (opening / closing member)
33a-33k, 43a Wheel (rotating member)
36, 37, 46, 47 Sealing members 13a to 13k recess

Claims (5)

First and second guide members, a first group of rotating members that can contact the first guide member, and a second group of rotating members that can contact the second guide member are rotatably supported. An opening and closing device comprising: an opening and closing member movable along the first and second guide members between a fully closed position and a fully opened position.
The first and second groups of rotating members each have at least three or more rotating members, and the first and second guide members have the first group and the second group when the opening member is located at the fully closed position. A concave portion is provided at a position where each rotating member of the group exists, and each rotating member and each concave portion of the first and second groups move when the opening / closing member moves between the fully closed position and the fully open position. At least two rotating members of each of the first group and the second group are arranged so as not to face the concave portion,
Opening opening and closing device. First and second guide members, a first group of rotating members that can contact the first guide member, and a second group of rotating members that can contact the second guide member are rotatably supported. An opening and closing device comprising: an opening and closing member movable along the first and second guide members between a fully closed position and a fully opened position.
The first and second groups of rotating members are divided into groups constituted by a plurality of rotating members, and the first and second guide members have the first group and the second group when the opening member is located at the fully closed position. A concave portion is provided at a position where each rotating member of each group of the second group exists, and each rotating member and each concave portion of each group of the first group and the second group have an opening / closing member in a fully closed position and a fully open position. At least one rotating member of each of the first group and the second group is arranged so as not to face the recess when moving between the first group and the second group.
Opening opening and closing device. 3. The opening and closing device according to claim 1, wherein contact members are provided on both sides of the opening in parallel with a moving direction of the opening and closing member. An opening / closing device in which a seal member abutting on a side surface is provided along a moving direction of the opening / closing member. 4. The opening / closing device according to claim 3, wherein the seal member contacts both side surfaces of each contact member. The opening / closing device according to any one of claims 1 to 4, wherein the concave portion has a closed-side inclined portion formed on the fully closed position side of the opening / closing member, and an opening formed on the fully opened position side of the opening / closing member. An opening and closing device having a side inclined portion, wherein the inclination of the closed side inclined portion is set to be larger than the inclination of the open side inclined portion.

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