JPH043113Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a circular door opening/closing device, and in particular, is an improvement on the circular door opening/closing device that is normally used as a sliding automatic door.

[Conventional technology]

In recent years, circular door opening/closing devices have been put into practical use as automatic doors installed at the entrances of buildings.
For example, as shown in FIG. 17, this opening/closing device includes a pair of door bodies A, A whose cross section is curved in an arc shape,
A pair of door pockets B and B having an arcuate curved portion similar to this are placed facing each other on the indoor D side and the outdoor E side, respectively, across the windbreak room C. The doorway F on the indoor D side and the doorway G on the outdoor E side can be opened by separating the door roller mechanism (not shown) and each pair of door bodies A and A locked therein in an arc shape or approaching each other. It is configured to open and close. In front and behind the entrances F and G, there are human body detection parts H...H for detecting the presence of a person using a detection switch, etc. By driving the drive device based on this, the corresponding door bodies A, A are opened and closed as sliding doors. In that case, as shown in the figure, each door body A...A corresponds to each door bag B...
. . . It is usually arranged offset to the inside of the windbreak room C with respect to B.

However, according to the conventional circular door opening/closing device described above, when an unforeseen situation such as a fire or an earthquake occurs and people indoors have to evacuate, the evacuees rush to the entrance and exit as quickly as possible. try At this time, the person must wait until the door bodies A and A are opened and the entrances and exits F and G are wide enough to allow people to pass through, which creates a panic situation and is extremely dangerous.

In addition, in the event of a power outage due to an unexpected situation such as a fire or earthquake, the drive system will stop operating and the door will not open automatically, which will prevent evacuees attempting to evacuate outdoors. The door had to be pulled open manually, making it difficult to evacuate quickly and smoothly.

Therefore, in order to solve this problem, we proposed a circular door opening/closing device that is connected to a door wheel mechanism so that the door body can be horizontally rotated via a rotating shaft to operate as a hinged door, as shown in Fig. 16. did.

[Problem that the invention attempts to solve]

However, according to the above-mentioned circular door opening/closing device, when the door body is opened as a hinged door, the door body is connected to the door roller mechanism only at the upper part of the drawing side end via the rotating shaft, Due to the center of gravity of the body, the upper part of the draw side edge of the door body moves along the rail, and the lower part of the draw side edge moves along the grooved rail on the floor, so The dividing side end (open end) hangs down due to its own weight, resulting in a problem that the end of the door body and the floor interfere with each other.

[Means for solving problems]

In view of the above circumstances, this invention was developed by adding an opening mechanism to the circular door opening/closing device, which is normally used as a sliding automatic door, to enable quick and smooth entry and exit in times of emergency or emergencies. In addition to providing a device, it was a technical problem to avoid the drooping of the open end of the door body and the interference between the door body and the floor surface caused by this, especially when the door body is opened as a hinged door. The means for this purpose are a pair of door pockets, a pair of door bodies arranged in the entrance/exit formed between these door pockets and curved in an arc shape, and a door that supports these door bodies and is movable in forward and reverse directions. A pair of door roller mechanisms are arranged on the indoor side and the outdoor side, respectively, with a windbreak room separated, and a drive device is provided that drives each door body so as to separate or approach each other in an arc shape along the entrance/exit. In the circular door opening/closing device, each door body is arranged uniformly offset only on the outdoor side with respect to each corresponding door compartment, and the door body is connected to the door body via a rotating shaft fixed to the drawing side end of each door body. is connected to each corresponding door roller mechanism so as to be horizontally swivelable in the offset direction, and is attached above the draw side end of each door body to rotate integrally with the rotation shaft. a first fitted member; a first plunger having a first fitted member rotatably fitted and held in the first fitted member; a first fitted member and a first fitted member; a cam mechanism that moves the first plunger upward when the rotating shaft rotates; and a cam mechanism that is attached to the upper end of the first plunger with an elastic member interposed so that the rotating shaft rotates by a predetermined angle. an upper rotating shaft support mechanism having a first pressing body that is pressed against a rail that supports the door roller mechanism; a second fitted member that rotates integrally with the second fitted member; a second plunger having a second fitted member that is rotatably fitted and held in the second fitted member; and a second fitted member that rotates integrally with the second fitted member; and a second fitting member, so that when the rotating shaft rotates, the second fitting member
a cam mechanism that moves the plunger downward; a first elastic member that urges the second plunger upward; and a lower end of the second plunger that forces the second plunger upward with a larger urging force than the first elastic member. a second pressing body that is attached with a second biasing elastic member interposed therebetween and that is pressed against a grooved rail formed along the lower end of the door bag when the rotating shaft rotates by a predetermined angle; It is equipped with a lower rotating shaft support mechanism.

[Effect]

According to the above means, a circular door opening/closing device in which each door body normally operates as a sliding door by the operation of a door wheel mechanism and a drive device, and a function as a swinging door in which each door body pivots horizontally using its drawing side end as a fulcrum. You will be able to own it. By allowing each door body to function as a swinging door in this way, there is no need to wait until the door is opened wide enough to allow people to pass through, and there is no need to manually open the door in the event of a power outage. There is no need to draw the body apart, and just by pressing the door body, the door body opens as a hinged door and it becomes possible to immediately pass through the doorway.

Furthermore, by arranging each door body so that it is offset to the outdoor side with respect to its corresponding door compartment, and by making it possible to horizontally rotate in the direction of this offset, evacuees can manually move each door body completely during evacuation, etc. This means that the door can be opened in the direction of evacuation, that is, the door body can be opened in the direction in which the evacuee is traveling, allowing the evacuee to pass through the doorway smoothly without any hindrance.

When a person pushes the door body and the door body is opened as a hinged door via the rotating shaft attached to the drawing side end, the upper rotating shaft support mechanism When the first fitted member rotates, the first plunger moves upward via a cam mechanism configured between it and the first fitted member, and as a result, the first pressing body is pressed against the rail. The rotating shaft is supported at a predetermined position above the rotary shaft.

On the other hand, below the door body, the second fitted member of the lower rotating shaft support mechanism rotates as the rotating shaft rotates, and a cam mechanism configured between the second fitting member and the second fitting member rotates. The second plunger connects to the first
The elastic member is compressed and moved downward, and as a result, the second pressing body is pressed against the grooved rail, and the rotating shaft is placed at a predetermined position below it (a position vertically below the position supported by the upper rotating shaft support mechanism). Supported by At this point, the second elastic member interposed between the lower end of the second plunger and the second pressing body urges the second plunger upward with a larger urging force than the first elastic member. Therefore, the second elastic member is not compressed.

Furthermore, when the rotating shaft rotates by a predetermined angle or more as the door body opens, in the upper rotating shaft support mechanism, the elastic member interposed between the upper end of the first plunger and the first pressing body is pressed. By being contracted, only the first plunger is allowed to move further upward, and in the lower rotating shaft support mechanism, the second plunger is allowed to move further upward.
By compressing the elastic member, only the second plunger is allowed to move further downward.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the drawings.

First, the schematic structure of the circular door opening/closing device according to this invention will be explained based on FIG. 1.

A circular door opening/closing device 1 installed at an entrance connecting the outdoors (top front side of the drawing) and the indoors includes a pair of door pockets 2, 2 arranged on the outdoor side and having a cross section curved in an arc shape. A pair of door bodies 4, 4 which are arranged at the entrance 3 formed between the two door bags 2, 2 and similarly curved in an arc shape, and an indoor door bag which is arranged opposite to these with a wind protection room 5 in between. 2', 2', an entrance/exit 3', and door bodies 4', 4'. And each door pocket 2, 2, 2', 2' and each door body 4, 4, 4',
Rails 8, 8 are installed on the mounting member 7 in the blind 6 disposed above 4', and each door roller mechanism 9 is supported by the rails 8, 8 so as to be able to run forward and backward.
... 9, the door bodies 4, 4, 4', 4' are arranged to be drawn apart or approached each other.

The door roller mechanism 9 is composed of a pair of door hangers 9a and 9b each having a running wheel attached thereto that runs on the corresponding rail 8, and a hanging frame body 9c fixed astride both hangers 9a and 9b, The door engine 11 rotates the timing belt 10 fixed to one hanger 9a, so that the hanging frame 9c and the door bodies 4, 4' are guided and moved in an arc shape. And the door roller mechanism 9,
A drive device consisting of a timing belt 10, a door engine 11, etc. is attached to a mounting member 7 on the outdoor side.
It is provided on the outer periphery of the member 7, and on the inner periphery of the member 7 on the indoor side. In the figure, 18 is a controller that controls all of the door bodies.

Furthermore, in addition to the above-described layout, in this device 1, the pair of door bodies 4, 4 on the outdoor side are located on the outer periphery of the door pockets 2, 2, and the door bodies 4', 4' on the indoor side are located on the outer periphery of the door pockets 2, 2. , 2'. In other words, all the door bodies are uniformly offset toward the outdoors with respect to each corresponding door compartment.

In addition, as the timing belt 10, a total of four timing belts 10...10 are used corresponding to the four door bodies 4, 4, 4', 4', and this belt 10 is used to open and close the door body. It is wound between a center pulley 13 held by a bracket 12 located above the center of the path and a side pulley 14 located above the draw-side ends of the door bodies 4, 4'. The bracket 12 (see Fig. 2) holds a pair of gears 15, 15 coaxially fixed to a pair of center pulleys 13, 13, and these gears 15, 15 are meshed with each other. As a result, each pair of timing belts 10, 10 are driven simultaneously by the door engines 11 provided one each on the indoor side and the outdoor side. Further, the pair of center pulleys 13,
13 is the distance between both belts 10, 10 when belts 10, 10 are wound around both pulleys 13, 13, respectively.
The dimension L1 between the outer circumferential surfaces of 0 and 10 is larger than the dimension from the bottom to the tip of the teeth of the teeth carved on the circumferential surface of the center pulley 13 or of the belt 10 with the same specifications (total tooth depth). It is set to be smaller,
This is designed to prevent a misalignment between the belt 10 and the pulley 13, that is, a tooth skipping phenomenon.

Further, a plurality of guide roller brackets 16...16 are attached to the mounting member 7, and the timing belt is supported by the guide rollers 16a and 16b, two of which are held on each of these brackets 16...16. 10 is movable in a substantially arc-shaped state. Of the two guide rollers 16a and 16b, one roller 16a is a toothless roller because it comes into contact with the non-toothed side of the timing belt 10, and the other roller 16b comes into contact with the toothed side of the timing belt 10. Therefore, it is a toothed roller.

On the other hand, each door body 4, 4, 4', 4' is not only operated as a sliding door as described above, but also rotates horizontally around its opening side end (drawing side end) as a center of rotation. Each door wheel mechanism 9...9 is connected to each door so that it can also operate as a hinged door.

That is, the end of each door body 4, 4' in the closing direction is connected to a hanging frame body 9c of the door wheel mechanism 9 via a door holder 20 (details will be described later), and the action of this door holder 20 causes the door to close. The end portions of the bodies 4, 4' are configured to easily be in a hemline state with respect to the corresponding hanging frame body 9a. On the other hand, the end of each door body 4, 4' in the opening direction is fixed to a rotating shaft 30 rotatably held by the corresponding hanging frame 9c, and the end of the door body in the closing direction When the door body 4, 4' is in a state where it is separated from the hanging frame body 9c, each door body 4, 4' horizontally pivots toward the outdoor side with the rotation axis 30 as the center of rotation.

As shown in FIGS. 3 and 4, the door holder 20 has a cylindrical protrusion 22 having an annular V-groove 22a fixed to a bracket 21 fixed to the upper part of the door body 4, 4'. A pair of cylinder members 25, 25 each having a built-in compression coil spring for biasing the spherical engaging claws 24, 24 are screwed onto a perforated member 23 fixed to the lower end of the frame 9c, and also have the projections 22. It has a configuration in which it can be inserted into and removed from the hole 26 of the hole member 23. When the door body 4, 4' is operated as a sliding door, the protrusion 22 is pushed into the hole 26 of the perforated member 23, so that the spherical engaging claws 24, 24 are engaged with the V-groove 22a of the protrusion 22. When the door body 4, 4' and the hanging frame body 9c are engaged with each other, the door body 4, 4' and the hanging frame body 9c are securely locked, and when the door body 4, 4' is operated as a hinged door, the door body 4, 4' is pressed toward the outdoors. The V groove 22a of the projection 22 and the spherical engaging claw 2
4, 24 is disengaged and the protrusion 22 is pulled out from the hole 26 (see FIG. 15), and the door body 4,
4' and the hanging frame body 9c are in a state of edge cutting.

In this case, when the door bodies 4, 4' operate as hinged doors, horizontal rotation is performed with the above-mentioned rotation axis 30 as the center of rotation.
At the moment when the protrusion 22 comes out of the hole 26 of the perforated member 23, the direction in which the protrusion 22 comes out is perpendicular to the straight line L2 connecting the rotation shaft 30 and the protrusion 22. Therefore, as shown in FIG. 15, the bracket 21, the protrusion 22, and the perforated member 23 are connected to the door body 4 so that the axis of the protrusion 22 and the center line of the hole 26 are perpendicular to the straight line L2. , 4'.

In particular, in this circular door opening/closing device 1, an upper rotating shaft support mechanism 40 and a lower rotating shaft supporting mechanism 50 are provided above and below the opening direction side end of each door body 4, 4', respectively. .

The upper rotating shaft support mechanism 40 includes a first fitting member 41a whose lower end is an inclined surface 41d as shown in FIG.
A screw member 41c with a flange 11b formed at the upper end.
and a cylindrical member 42a whose upper end is an inclined surface 42c as shown in FIG.
a cam body 42 fixedly integrated with a first fitted member 42b; and a cam body 42 having concave portions 43a, 43a spanning the rail 8 at the upper end as shown in FIG. 8, and a hole substantially in the center thereof through which the screw member 41c passes. 43c, and a first pressing body 43 having shoes 43b made of rubber or the like that come into contact with and separate from the lower surface of the rail 8. As shown in FIG. 9, the flange 4 of the first plunger 41 is
1b and the upper surface of the first fitting member 41a, a plunger 41, which is formed by sandwiching the bottom wall 43d of the first pressing body 43 and an elastic member 44, moves upward against the elastic force of the elastic member 44. With the first fitting member 41a of the first plunger 41 rotatably fitted into the first fitted member 42b of the cam body 42, the cam body 42 and A rotating shaft 30 rotatably held on the hanging frame 9c is fixed to the hanging frame 9c using bolts 45.

On the other hand, the lower rotating shaft support mechanism 50
Cylindrical body 51a whose lower end is an inclined surface 51d as shown in the figure.
a cam body 51 which is fitted into a second fitted member 51b and which is integrally welded to a bracket 51c, and a second cam body 51 whose upper end is an inclined surface 52e as shown in FIG. The second plunger 5 has a fitting member 52a fixed to a screw member 52b, a retainer 52c at the upper part, and a flange 52d at the lower part.
2, and a second pressing body 53 having a through hole 53a formed in its upper surface as shown in FIG. As shown in FIG. 13, the second fitting member 52a of the second plunger 52 is inserted into the second fitting member 52a of the cam body
It is rotatably held within the fitted member 51b and the second
The screw member 52ba of the plunger 52 is loosely inserted into the hole 53a of the second pressing body 53, and a small spring constant is formed between the upper surface of the second fitted member 51b of the cam body 51 and the retainer 52c of the second plunger 52. With the first spring 54 interposed and the second spring 55 having a large spring constant interposed between the lower surface of the second fitting member 52a of the second plunger 52 and the upper surface of the second pressing body 53, the cam body 51
The bracket 51c and the door bodies 4, 4' are fixed using bolts 56, 56. and,
The second pressing body 53 is unrotatably loosely fitted into a groove-shaped rail 57 formed on the floor surface along the lower end of the door pockets 2, 2'. In addition, in this device 1, human body detection switches are provided before and after the outdoor entrance 3 and before and after the indoor entrance 3' shown in FIG. When a person enters or leaves the room, each door body 4, 4' is automatically opened as a sliding door.
When the door holder 20 is brought into a state of being cut off by pressing the door 4' toward the outdoors, the function of opening the door as a sliding door is stopped.

Therefore, in this embodiment, switching control between operating the door bodies 4, 4' as sliding doors and operating them as swinging doors as described above is as follows.
This is done by the following means.

That is, as shown in FIG. 14, the side surface 4b (indoor side surface) of the frame 4a at the end of the door body 4, 4' in the closing direction is placed inside the frame 2a at one end of the door pockets 2, 2'. A directional photoelectric switch 60 is attached, and a control device 61 for controlling the drive of the door engine 11 based on an output signal from the photoelectric switch 60 is installed in the controller 1 in the door engine 6.
It is provided within 8. The above photoelectric switch 60
has a light projecting section that projects near-infrared modulated light, and a light receiving section that receives the light emitted from the light projecting section and reflected on the side surface of the door frame 4a, and as shown in the figure, the door When the bodies 4, 4' are in a state where they can operate as sliding doors, they are attached so that they are oriented in a predetermined direction so that the light emitted from the light projecting part can be received by the light receiving part. Further, the photoelectric switch 60 adjusts the length of the door body 4, 4' so that it always points toward the side surface 4b of the horizontal frame 4a of the door body 4, 4' even when the door body 4, 4' opens and closes as a sliding door. It is attached to the frame 4a. Furthermore, the control device 61 can be broadly classified into a first
As shown in FIG. 5, it consists of a detection section 62 and a control section 63, and the detection section 62 generates oscillation for sending a desired electrical signal to a light projection element 64 provided in the light projection section of the photoelectric switch 60. a circuit 65, a light receiving circuit 67 that converts the light received through the light receiving element 66 provided in the light receiving section of the photoelectric switch 60 into an electrical signal, an amplifier circuit 68 that amplifies this converted signal, and A detection circuit 69 receives a signal from an amplifier circuit 68 and extracts only an electric signal corresponding to the light emitted from the light projecting element 64, and a switch 70a is turned on and off based on the signal from the detection circuit 69. The output circuit 70 has an output circuit 70. Then, switch 7 of this output circuit 70
0a is emitted from the light emitting element 64 and is emitted from the door frame 4a.
While the light reflected by the side surface 4b is received by the light receiving element 66, the light receiving element 66 is in the ON state. On the other hand, the control section 63 includes a reset circuit 72 into which a signal from the output circuit 70 of the detection section 62 is input via a photocoupler 71, and a reset terminal that is set to HIGH or LOW based on the signal from the reset circuit 72. In addition to having a CPU 73, this CPU 7
The signal a from the human body detection switch mentioned above is input to 3, and the signal a from the door engine 1 is input from the CPU 73.
1 outputs an open signal b and a close signal c for opening and closing the door bodies 4, 4' as sliding doors. still,
In the figure, reference numerals 74 and 74 indicate pull-up resistors, and 75 indicates a capacitor for preventing chattering.

When each door body 4, 4' is operated as a sliding door, the switch 70 of the output circuit 70 is activated.
When a is in the ON state, a signal indicating this is input to the reset circuit 72 via the photocoupler 71, and the signal from the reset circuit 72 pulls up the reset terminal of the CPU 73 to HIGH, causing the CPU 73 to operate. It becomes possible.
Under such a state, the CPU 73 outputs an open signal b or a close signal c based on a signal a from the human body detection switch indicating whether or not a person entering or leaving the room has entered the human body detection range.

On the other hand, when each door body 4, 4' horizontally rotates via the rotation shaft 30 as a hinged door, the door body frame 4
Due to the side surface 4b of A being tilted from its original state, the light emitted from the light emitting element 64 is no longer received by the light receiving element 66, and accordingly, the switch 70a of the output circuit 70 is turned OFF. become. Therefore, the predetermined signal is no longer input to the reset circuit 72, and the reset terminal of the CPU 73 becomes LOW.
will be reset. And like this CPU7
3 is in the reset state, signal a indicating that a person entering or exiting the room has entered the human body detection range is sent to the CPU.
73, the open signal b from the CPU 73
The closing signal c is not outputted, and the automatic opening/closing operation of the door bodies 4, 4' is prevented. In this way, when each door body 4, 4' operates as a swinging door, its function as a sliding door is stopped.

Next, the operation of this embodiment will be explained.

The circular door opening/closing device 1 has all door bodies 4,
4' is arranged offset to the outdoor side with respect to the corresponding door pockets 2, 2', and can be horizontally rotated toward the outdoor side via the rotating shaft 30, so that the person leaving the room can move as shown below. It is possible to exit from indoors to outdoors by following these steps.

That is, in the event of an unexpected situation such as a fire or an earthquake, evacuees should first open the pair of door bodies 4' located at the indoor entrance 3', as shown in Figure 16.
By pushing 4' toward the outdoor side as shown by arrow X, both door bodies 4',
4' is opened as a hinged door, and brought into contact with both stoppers 80, 80, as shown by reference numeral V or V' in the figure. In this state, the evacuee passes through the indoor doorway 3', enters the windbreak room 5, and then opens the pair of door bodies 4, 4 provided at the outdoor doorway 3. , by pushing toward the outdoor side as shown by arrow Y, mark W or mark
Contact the stoppers 81, 81 as shown by W',
The user passes through this outdoor doorway 3 and exits outdoors.

In that case, especially in the upper rotating shaft support mechanism 40 shown in FIG.
When not rotating, that is, when operating as a sliding door, as shown in the figure, the inclined surface 41d of the first plunger 41 and the inclined surface 42c of the cam body 42 are in close contact with each other, so that the first pressing body 43 is show 4
3b and the rail 8 are separated by a predetermined dimension, but when the cam body 42 rotates with the rotation of the door bodies 4, 4', the first pressing body 43 is placed in a non-rotatable state and the rail 8 Because it straddles both slopes 4
The state of contact between 1d and 42c changes and the first plunger 41 moves upward, thereby causing the
3b comes into contact with the rail 8, and the upper part of the rotating shaft 30 is supported in a predetermined position. When the door bodies 4, 4' further rotate from such a state, only the first plunger 41 is moved against the elastic member 44.
moves upward while being compressed, and the collar portion 41b is separated from the bottom wall 43c of the first pressing body 43.

On the other hand, the lower rotating shaft support mechanism 50 shown in FIG.
In this case, when the rotating shaft 30 and the door bodies 4, 4' are not rotated, the inclined surface 52e of the second plunger 52 and the inclined surface 51d of the cam body 51 are aligned as shown in the figure.
Due to their close contact, the bottom surface 57a of the grooved rail 57 and the second pressing body 53 are separated by a predetermined distance, but the cam body 51 rotates as the door bodies 4, 4' rotate. Possibly the first spring 54
The plunger 52 moves downward while being compressed, so that the pressing body 53 comes into contact with the bottom surface 57a of the grooved rail 57, and the rotating shaft 30 is supported below. When the door bodies 4, 4' further rotate from this state, only the second plunger 52 moves downward while compressing the second spring 55, and as a result, the upper wall of the pressing body 53 and The flange 52d of the plunger 52 is separated. At this time,
The second spring 55 maintains the grooved rail 57 in a state in which it is always in contact with the bottom surface 57a.

When the door body 4, 4' is opened as a hinged door, the upper and lower rotating shaft support mechanisms 40, 50 operate to provide upper support at the end of the door body 4, 4' in the opening direction. Since the point and the lower support point are arranged substantially on a vertical line at predetermined positions on the door movement path, the door bodies 4, 4' are horizontally turned around this vertical line.

In the above embodiment, the wind protection chamber has a substantially perfect circular shape in plan view, but the invention is not limited to this. For example, the wind protection chamber may have a cocoon shape or a long shape in plan view. The same applies to circular objects.

[Effect of idea]

As described above, according to this invention, a means for operating as a swinging door is added to the circular door opening/closing device that normally operates as a sliding door, and all the door bodies are opened toward the outdoors. Since the entrance is configured to open in the evacuation direction, the entrance is opened simply by the evacuee pressing the door body in the evacuation direction, allowing the evacuee to pass through quickly and smoothly.

Furthermore, when the door body is opened as a hinged door, the rotation axis of the door body is reliably supported by the operation of the upper rotation shaft support mechanism and the lower rotation shaft support mechanism, so that the door body cannot be opened. The drooping of the edges and the resulting interference between the door body and the floor surface are effectively prevented.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a perspective view showing the overall configuration of a circular door opening/closing device, and Fig. 2 is a partially cutaway enlarged front view showing the structure around the center pulley provided in this device. Fig. 3 is an enlarged vertical sectional side view of the main part showing the structure of the door holder provided in this device, Fig. 4 is an enlarged longitudinal sectional front view of the main part cut along the line of Fig. 3, and Fig. 5 is
6, 7, and 8, which are partially cutaway plan views viewed from the line, respectively show the first plunger, the cam body, and the first plunger, which are the components of the upper rotating shaft support mechanism provided in this device.
FIG. 9 is a perspective view showing the pressing body; FIG.
Figures 1 and 12 are perspective views showing the cam body, second plunger, and second pressing body, which are the components of the lower rotary shaft support mechanism provided in this device, and Figure 13 shows the structure of the lower rotary shaft support mechanism. 14 is a control system diagram of the circular door opening/closing device, FIG. 15 is a circuit diagram showing the configuration of the control device, and FIG. 16 is a schematic plan view of the circular door opening/closing device showing the operation. FIG. 17 is a schematic plan view showing a conventional example. 1... Circular door opening/closing device, 2, 2'... Door pocket,
3, 3'... Doorway, 4, 4'... Door body, 8... Rail, 9... Door roller mechanism, 9c... Hanging frame body, 30...
...Rotating shaft, 40... Upper rotating shaft support mechanism, 41...
...first plunger, 41a...first fitting member, 4
2b...First fitted member, 44...Elastic member, 5
0... Lower rotating shaft support mechanism, 51b... Second fitted member, 52... Second plunger, 52a... Second fitting member, 54... First elastic member, 55... Second elastic member , 57...grooved rail.

Claims (1)

[Scope of utility model registration request] A pair of door pockets, a pair of door bodies arranged in an entrance/exit formed between these door pockets and curved in an arc shape, and a pair of door roller mechanisms that support these door bodies and can run in forward and reverse directions, respectively. , a circular door opening/closing device which is arranged on the indoor side and the outdoor side with a windbreak room separated, and is equipped with a drive device that drives each door body in an arc shape along the entrance or exit so as to draw or approach each other. Each door body is arranged uniformly offset only on the outdoor side with respect to each corresponding door compartment, and the offset direction is determined through a rotating shaft fixed to the drawing side end of each door body. It is connected to the corresponding door roller mechanism so that it can rotate horizontally, and
a first fitted member that is attached above the draw-side end of each of the door bodies and rotates integrally with the rotation shaft;
a first plunger having a first fitting member rotatably fitted and held in the first fitted member;
a cam mechanism configured between the fitted member and the first fitting member and configured to move the first plunger upward when the rotating shaft rotates; and an elastic member attached to the upper end of the first plunger. an upper rotating shaft support mechanism having a first pressing body that is pressed against a rail supporting the door roller mechanism when the rotating shaft rotates by a predetermined angle; a second fitting member that is attached below the end and rotates integrally with the rotating shaft; and a second fitting member that is rotatably fitted and held by the second fitting member. a plunger, the second fitted member and the second fitted member;
a cam mechanism configured between the fitting member and the second plunger to move the second plunger downward when the rotating shaft rotates; a first elastic member that biases the second plunger upward; A second elastic member is attached to the lower end of the door pocket to urge the second plunger upward with a larger urging force than the first elastic member, and when the rotating shaft rotates by a predetermined angle, the second plunger is attached to the lower end of the door bag. A circular door opening/closing device characterized by comprising a lower rotary shaft support mechanism having a second pressing body pressed against a groove-shaped rail formed along the lower rotary shaft support mechanism.