JP2724688B2 - Automatic opening and closing device and retractable stage device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic switching device,
The present invention relates to an automatic opening / closing hinge used as a hinge mechanism, and further relates to a retractable stage device having the same.

[0002]

2. Description of the Related Art Conventionally, hinge mechanisms have been used for various machines and structures. Also, among stage devices installed in public halls, gymnasiums, various halls, and the like, there is a wall surface storage type stage device that stores a wall toward a wall surface in order to make effective use of space. Furthermore, among the above-mentioned wall-mounted stage devices, there are folding wall-mounted stage devices due to restrictions on ceiling height. However, these wall-mounted stage devices also have a hinge mechanism for storage and folding. Used.

[0003]

However, in the conventional hinge mechanism, particularly, the hinge mechanism used in the above-mentioned wall-mounted type stage is often of a manual type, and has a problem that it takes time to open and close.

[0004] Further, there is a type in which an electric opening and closing device is attached to the above-mentioned wall-storage type to automatically open and close, but the conventional electric opening and closing device has a problem that the installation space becomes large. In particular, in the conventional opening / closing device, there is a problem that the space in the vertical direction with respect to the axial direction of the hinge mechanism becomes large, and when it is used as a stage device, it cannot be applied to a low floor stage. .
Further, there is a problem that the cost merit in the case of the manual type is small because an additional device for the driving power source and the driving device is required.

Accordingly, the present invention is a small-sized automatic opening / closing device for a low floor which can be attached even in a small space.
An object of the present invention is to provide an automatic opening / closing device which can reduce the cost and can be easily attached to a hinge portion of a foldable stage device or the like, and a retractable stage device having the same.

An automatic opening / closing device according to the present invention has been created to solve the above-mentioned problems.
An automatic opening and closing device for opening and closing the two members by changing a relative angle between the two members, wherein the screw groove forming shaft having a screw groove formed therein , wherein one of the two members is used.
A screw groove forming shaft rotatably supported on the side of the shaft, and a driving unit for rotating the screw groove forming shaft .
Of the member on which the thread groove forming shaft is supported
A drive unit provided on the side, a nut screwed with the screw groove forming shaft, and an inner peripheral portion such that the nut is slidable in the axial direction inside, and gradually rotates as the nut moves in the axial direction. in cylindrical body twisting is applied, the two parts
The material is different from the member on which the thread groove forming shaft is supported.
A cylindrical body provided on the side of the member, and a rotation restricting portion for restricting rotation of the nut around the screw groove forming shaft, wherein the screw groove forming shaft of the two members is
And a rotation restricting portion provided on the side of the shaft-supported member .

Third, a screw groove forming shaft having a screw groove formed therein, a driving portion for rotating the screw groove forming shaft, a nut screwed with the screw groove forming shaft, and the nut being internally provided. A first hinge piece having one or a plurality of cylindrical bodies whose inner peripheral portion is twisted so that the nut is gradually rotated as the nut moves in the axial direction, and the first hinge piece. A second hinge piece having a plurality of cylinders alternately arranged in the cylinder, a pair of substantially rod-shaped rotation restricting members provided on an inner peripheral wall of the cylinder, wherein the nut shaft The second hinge piece having a rotation restricting member that restricts the rotation of the nut in the rotation direction by fitting on both sides of the screw groove , the screw groove forming shaft is rotatable.
A second hinge provided with the drive unit
And the driving section drives the
The relative angle between the first hinge piece and the second hinge piece changes.
Open and close.

Thirdly, there is provided an automatic opening / closing apparatus for opening and closing the two members by changing the relative angle between the two members, wherein the shaft has a thread groove formed therein, A driving unit for rotating the shaft, a nut screwed with the thread groove forming shaft, and the nut is slidable in the axial direction inside, and twisted to the inner peripheral portion so as to gradually rotate as the nut moves in the axial direction. A first hinge piece having a plurality of processed cylinders, and a plurality of cylinders alternately arranged on the plurality of cylinders of the first hinge piece, and on an inner peripheral wall of the cylinder, A second hinge piece provided with a pair of substantially rod-shaped rotation restricting members, which are provided on both sides of the nut with the shaft interposed therebetween and provided with a rotation restricting portion for restricting rotation of the nut in the rotation direction. It is characterized by the following.

Fourthly, in the above-mentioned third configuration, three or more cylinders provided on the second hinge piece are provided, and the rotation restricting portion provided between the cylinders at both ends is connected to another cylinder. It is characterized by exhibiting a structure supported by the body. Fifth, in any one of the first to fourth configurations, the torsion angle in the torsion processing performed on the cylindrical body is formed by changing according to the axial position of the cylindrical body. It is a feature.

Sixth, in any one of the first to fifth configurations, the driving unit is a motor operatively connected to a thread groove forming shaft, the motor having a substantially elongated cylindrical shape. It is characterized by having. Seventhly, a retractable stage device is provided with an automatic opening / closing device having any one of the first to fifth configurations.

[0011]

In the automatic opening / closing device of the first configuration according to the present invention, the drive section rotates the thread groove forming shaft. Then, since the rotation of the nut around the thread groove forming shaft is regulated by the rotation regulating portion, the nut moves along the axial direction of the thread groove forming shaft. Then, since the inner peripheral portion of the cylindrical body is subjected to the torsion processing, the cylindrical body is gradually rotated by the movement of the nut. Therefore, of the two members,
The member on the side where the shaft is attached and the cylinder
The member on the closed side opens and closes to function as a hinge mechanism.
You.

According to the automatic opening / closing device of the present invention, since the nut is moved into the torsionally formed rectangular cylinder by rotating the thread groove forming shaft to form the opening / closing hinge, the space in the direction perpendicular to the axial direction is saved. Can be made smaller,
The space in the axial direction can be reduced, and the entire apparatus can be extremely reduced in size. In particular, since the nut is screwed to the shaft in the rectangular cylinder, the cost can be reduced. Also, regarding the opening and closing angles of the two members that open and close, the members that open and close gradually open and close due to the rotation of the thread groove forming shaft, so that the opening and closing angles can be extremely finely controlled by controlling the number of rotations of the shaft.

[0013] In the automatic opening and closing device of the second configuration, the rotation restricting portion is provided in parallel with the shaft, and the shaft inserted at the eccentric position of the nut is provided. The nut cannot be rotated along the thread forming shaft by rotating the thread forming shaft without being able to rotate around the forming shaft. Here, in the present invention, since the rotation restricting portion is formed by the shaft, it can contribute to cost reduction.

Further, in the automatic opening and closing device of the third configuration, the drive unit rotates the thread groove forming shaft. Then, since the rotation of the nut around the thread groove forming shaft is regulated by the rotation regulating portion, the nut moves along the axial direction of the thread groove forming shaft. Then, since the inner peripheral portion of the cylindrical body provided on the first hinge piece is twisted, the first hinge piece gradually rotates by moving the nut. Therefore, the first
The relative angle between the hinge piece and the second hinge piece changes to open and close,
It functions as a printer mechanism.

Since the first hinge piece and the second hinge piece are alternately arranged, the opening and closing mechanism such as a shaft and a nut is concealed. The appearance is similar to that of, without impairing the aesthetic appearance, and is also excellent in safety. In particular, if the rotation restricting portion is supported at an intermediate position by using three or more cylindrical members of the second hinge piece as in the fourth configuration, the rotation restricting portion does not bend and can be opened and closed stably. You can get the action.

Further, in the fifth configuration, since the torsion angle is formed by changing the position in the axial direction of the cylindrical body, the opening / closing speed of the hinge can be changed. If the torsion angle near the ends is reduced and the torsion angle near the center is increased, the opening / closing operation will rotate slowly at the beginning, then the rotation speed will increase, and at the end of the opening / closing operation it will rotate slowly again. Can be realized.

Next, according to the automatic opening / closing device of the sixth configuration, since the motor has a substantially elongated cylindrical shape, the space in the direction perpendicular to the axial direction of the shaft is reduced, and the device is further downsized. be able to.

Furthermore, according to the retractable stage device of the seventh configuration, since the space for the hinge mechanism can be reduced, no extra space is required, and in particular, the space in the direction perpendicular to the axial direction is reduced. By doing so, it can be easily applied to a low-floor type stage.

[0019]

An embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 1 and 2, an automatic opening / closing hinge P1 as an automatic opening / closing device according to a first embodiment of the present invention has two ends rotatably supported about opening / closing shaft portions 8a and 8b. It is for automatically opening and closing the two frames 2 and 4, and has an opening / closing mechanism section 20 and a driving section 40. Here, the opening / closing shaft 8a is supported by an end bracket 6a attached to the frame 2 and a pair of end brackets 7a attached to the frame 4, and is located at the other end of the opening / closing shaft 8a. The open / close shaft 8b is also pivotally supported by an end bracket 6b attached to the frame 2 and a pair of end brackets 7b attached to the frame 4.

The details of the opening / closing mechanism section 20 will be described below. As shown in FIGS. 1, 2 and 3, the opening / closing mechanism section 20 includes a shaft 10, a rotation regulating shaft 12,
And a nut 30a. Here, both ends of the shaft 10 are rotatably supported by shaft support portions 14 and 16 fixed to the frame 2, and the shaft 10 is provided with a thread groove as shown in FIG.

A shaft 12 for restricting rotation is supported on the shaft support 14 and the shaft support 16 in parallel with the shaft 10. Unlike the shaft 10, the rotation regulating shaft 12 is not provided with a thread groove.

Next, around the shaft 10 and the rotation regulating shaft 12, as shown in FIGS.
The twisted cylinder 22 is provided via a nut 30a.
That is, as shown in FIGS. 1, 2, and 3, the torsion square tube 22 has a tubular shape, and has a shape in which a normal square tube is twisted by 90 degrees between its ends. The cross-sectional shape of the torsion square tube 22 is a rectangular frame at any position, but the cross-section gradually rotates as the shaft 10 advances in the axial direction, from one end to the other end of the torsion square tube 22. Rotate 90 degrees in the direction perpendicular to the axis direction. As shown in FIG. 1 and FIG.
Has been fixed by.

As shown in FIG. 3, a nut 30a is slidably disposed in the torsion cylinder 22 while gradually rotating in the axial direction of the torsion cylinder 22. The details of the configuration of the nut 30a will be described. As shown in FIGS. 4 (a) to 4 (c), a screw hole 30a-2 is provided at the center, and an inner periphery of the screw hole 30a-2 is provided. A thread groove for meshing with a thread groove provided on the shaft 10 is provided. Further, an insertion hole 30a-4 for inserting the rotation restricting shaft 12 is provided between the screw hole 30-a and the side portion.

Next, the configuration of the driving section 40 will be described. The drive unit 40 has a configuration in which a motor 42 is fixed to the frame 2, and an output shaft of the motor 42 is connected to the shaft 10 via a coupling 48. The structure of the drive section 40 will be described in more detail. The motor 42 has a substantially elongated cylindrical shape, and both ends are supported by motor support sections 44 and 46. The motor support portions 44 and 46 are fixed to the frame 2. Since the motor 42 is formed in a substantially columnar shape, the space in the direction perpendicular to the axial direction of the shaft 10 is reduced.

The motor output shaft 42-1 of the motor 42
Is connected to the coupling 48. Further, the coupling 48 is connected to an end of the shaft 10 supported by the shaft support 16.

Next, the operation of the automatic opening / closing hinge P1 having the above configuration will be described. First, a case where the motor 42 rotates leftward when viewed from the motor side will be described. In this case, the shaft 10 rotates as shown by the solid arrows in FIGS. Then, the nut 3 screwed into the shaft 10
0a gradually moves to the shaft support portion 14 side.
Since the rotation of the nut 30a is regulated by the rotation regulating shaft 12, the nut 30a itself advances gradually without rotating. Then, since the torsion square tube 22 slidably provided around the nut 30a is formed by being twisted as described above, the torsion square tube 22 is gradually viewed from the motor 42 side as shown in FIG. And turn left. Therefore, the frame 4 gradually rotates with respect to the frame 2 as shown by the solid line in FIG.

On the other hand, when the motor 42 rotates clockwise as viewed from the motor side, the shaft 10 rotates as shown by the broken arrow in FIGS. 1 and 3, and the nut 30a is It gradually moves from the shaft support 14 to the shaft support 16. As a result, the torsion cylinder 22 gradually rotates clockwise as viewed from the motor 42 side as shown in FIG. 1, so that the frame 4 gradually rotates with respect to the frame 2 as shown by a broken line in FIG.

As described above, the frames 2 and 4 can be opened and closed automatically by rotating the motor 42 in the normal and reverse directions. In particular, in the present embodiment, the nut 30a is slidable in the twisted torsion cylinder 22 and the nut 10a is moved in the axial direction by rotating the shaft 10, and the frames 2, 4 are opened and closed. Since the elongated cylindrical motor 42 is used, the space in the direction perpendicular to the axial direction can be reduced.
Since the nut 30a is slid inside, the space in the axial direction can be reduced, and the whole apparatus can be extremely reduced in size. Also, regarding the opening / closing angle of the hinge mechanism, since the frame gradually opens and closes by the rotation of the motor, the opening / closing angle can be extremely finely controlled by controlling the number of rotations of the motor. Further, in the present embodiment, the configuration is such that the nut screwed to the shaft is slid in the torsion angle cylinder, so that the cost can be reduced.

Next, another embodiment of the nut provided in the torsion square cylinder 22 will be described. The nut 30b is shown in FIG.
As shown in (a) to (c), the nut 30a has substantially the same configuration as that of the nut 30a, and is provided with a screw hole 30b-2 provided with a screw groove at the center thereof. An insertion hole 30 through which the rotation regulating shaft 12 is inserted.
The point that b-4 is provided is the same, but differs in that the protrusions 30b-6 are provided at the four corners. By doing so, the contact area between the nut 30b and the inner peripheral surface of the torsion square cylinder 22 can be reduced, so that the nut 30b slides easily in the torsion square cylinder 22 and operation problems are reduced. can do.

A nut 3 which is another embodiment of the nut
In 0c, as shown in FIGS. 6A to 6C, wheels 30c-6 are mounted on the upper and lower sides of the nut main body 30c-1. The wheel 30c-6 is connected to the nut body 30c-
Nut main body 3 through a shaft portion provided on
0c-1, and the bearing facilitates the sliding of the nut 30c within the torsion cylinder 22. The nut body 30c-1 has the nuts 30a, 30
A screw hole 30c-2 is provided as in the case of b.
An insertion hole 30c-4 is provided. According to the nut 30c of the present embodiment, the twisted cylinder 22 is formed by the wheels 30c-6.
Since the sliding inside is easy, troubles in operation of the hinge mechanism can be reduced.

In the above embodiment, a torsion cylinder having a rectangular cross section has been described as an example.
As long as the nut is gradually rotated by sliding the nut in the axial direction, the nut is not limited to the twisted cylinder having the rectangular frame-shaped cross section as described above.

That is, various types of cylinders for sliding the nut inside can be considered as shown in FIG. Here, the one shown in FIG. 7 (a) is formed by twisting a rectangular tube having a rectangular frame-shaped cross section, which is of the same type as the above embodiment. Next, the one shown in FIG.
This cylinder is formed by twisting the cylinder 62 formed with 0, and in the case of this type of cylinder, a nut having a basic shape having a circular cross section and having concave portions on both sides is used.
Next, what is shown in FIG. 7C is one in which a spiral groove 66 is formed in a cylinder 64 having a circular frame-shaped cross section, and the final outer shape is the same as that of the above-described type of FIG. is there. Next, what is shown in FIG. 7D is one in which a ring-shaped member 68 having a rectangular opening provided on a thin circular member is laminated and fixed, and each ring-shaped member has an internal space. Are slightly shifted in the direction of rotation so as to form a twist. Further, the cylinder shown in FIG. 7E is formed by twisting a cylinder 72 having convex portions formed on all sides of the inner wall.

Of the above various cylinders, FIG.
(E) and (e) have an advantage that the appearance is not impaired because the twisted portion is not visually recognized.

Next, an automatic opening / closing hinge P2 as a second embodiment will be described. The automatic opening / closing hinge P2 is shown in FIG.
As shown in FIG. 9, a first hinge piece 102 and a second hinge piece 112 are provided, and the first hinge piece 102 and the second hinge piece 112 are opened and closed with each other.

That is, the first hinge piece 102 has substantially cylindrical cylindrical portions 104-1 and 104-2, and has a flat plate portion 103 extending from the cylindrical portions 104-1 and 104-2. doing. Also, the second hinge piece 214
Similarly, substantially cylindrical portions 114-1, 114-2,
114-3, and the cylindrical portions 114-1, 1
14-2, 114-3, and has a flat plate portion 113, and the cylindrical portion 104-1 of the first hinge piece 102 is the second hinge portion 102.
The hinge piece 112 is arranged between the cylindrical parts 114-1 and 114-2, and the cylindrical part 104-2 is arranged between the cylindrical parts 114-2 and 114-3 of the second hinge piece. The first hinge piece 102 and the second hinge piece 112 are formed of an extruded aluminum material.

Here, spiral splines are formed on the inner periphery of the cylindrical portions 104-1 and 104-2 of the first hinge piece 102, and are formed so as to mesh with the spiral splines formed on the nut 130. Have been. In addition, the second
Cylindrical parts 114-1, 114-2, 11 of hinge piece 112
Reference numeral 4-3 has a space with a substantially circular cross section inside, and has a diameter through which a nut 130 described later can pass.

Next, in the cylindrical portions of the first hinge piece 102 and the second hinge piece 112, the first hinge piece 102
An opening and closing mechanism for rotating the and the second hinge piece 112 with each other is provided. That is, as shown in FIG. 9, the shaft 120, the rotation restricting member 122, and the nut 130 sliding on the shaft 120 are provided in each of the cylindrical portions.
And a motor (not shown).

Here, a thread groove is formed in the shaft 120 as shown in FIG.
The other end is connected to the output shaft of a motor housed in the inside, and the other end is rotatably mounted inside the cylindrical portion 114-3.

The rotation restricting member 122 is formed by the cylindrical portions 114-1, 114-2, 114 of the second hinge piece 112.
-3, which is attached to the inner peripheral wall, and is provided as a pair on the left and right. The rotation regulating member 122 is attached to the second hinge piece 112 by press-fitting. The rotation restricting member 122 restricts rotation of the nut 130 described later.

As shown in FIG. 9, the nut 130 has a spiral spline on its outer periphery, and has a concave portion on the left and right for fitting with the rotation regulating member 122. Therefore, when the shaft 120 rotates, the nut 13
0 will slide on the shaft 120. The axial length of the nut is, as shown in FIG.
14-2 is formed longer than the axial length. Therefore, the nut 130 is securely engaged with the spline of the first hinge piece 102 even when passing through the cylindrical portion 114-2.

Next, the operation of the automatic opening / closing hinge P2 having the above configuration will be described. First, the case where the motor rotates left as viewed from the motor side will be described. In this case, the shaft 120 rotates as shown by the solid arrow in FIG.
Then, the nut 13 screwed into the shaft 120
0 gradually moves to the cylindrical portion 114-3 side. Since the rotation of the nut 130 in the rotation direction is restricted by the rotation restricting member 122, the nut 130 itself does not rotate. Then, the cylindrical portion 10 of the first hinge piece 102
Since the spiral splines are formed on the inner circumferences of 4-1 and 104-2, the first hinge piece 102 gradually rotates rightward when viewed from the motor side.

On the other hand, when the motor rotates clockwise as viewed from the motor side, the shaft 120 rotates as shown by the dashed arrow in FIG. It gradually moves from the third side to the cylindrical part 114-1 side. Thereby, the first hinge piece 112 rotates to the left as viewed from the motor side.

As described above, by rotating the motor forward and backward, the first hinge piece 102 and the second hinge piece 112 can be opened and closed automatically. In this embodiment, similarly to the first embodiment, the hinge itself can be reduced in size and the opening / closing angle can be finely controlled.
Since it is concealed by each cylindrical portion of the hinge piece 112, the appearance is similar to that of the conventional hinge member, without deteriorating the aesthetic appearance, and also excellent in safety.

Further, the automatic opening / closing hinge P of the second embodiment is used.
In 2, the rotation regulating member 122 provided between the cylindrical portion 114-1 and the cylindrical portion 114-3 is also supported by the cylindrical portion 114-2. Can be obtained. That is, in the first embodiment, since the rotation regulating shaft 12 is only supported between the shaft supporting portions 14 and 16, the rotation regulating shaft 12 may be bent.
In the second embodiment, there is no danger. In the second embodiment, only the cylindrical portion 114-2 supports the rotation restricting member 122 at the intermediate position. However, when the automatic opening / closing hinge becomes long, the rotation restricting member 122 is rotated from the second hinge piece 112 side as needed. By providing a cylindrical portion for supporting the regulating member 122, it is possible to cope with an automatic opening / closing hinge that is long in the axial direction. In the second embodiment, since the nut 130 is supported on both sides by the rotation restricting member 122, there is no offset load on the shaft 120, and stable rotation can be obtained.

The torsion cylinder 2 in the first embodiment described above.
It is conceivable to change the opening / closing speed of the opening / closing member by gradually changing the inclination angle of the twist of the spiral spline of the cylindrical portions 104-1 and 104-2 of the first hinge piece 102 in the second and second embodiments. . That is, for example, in the torsion angle cylinder 22 of the first embodiment, the inclination angle of the torsion is made gentle at both ends and steep near the center, so that the automatic opening / closing hinge is opened from the closed state or opened. When changing from the open state to the closed state, it is possible to realize an operation of slowly rotating at the beginning of the opening and closing operation, thereafter increasing the rotation speed, and slowly rotating again at the end of the opening and closing operation. .

Next, the automatic opening / closing hinge P of each of the above embodiments will be described.
1, a specific application example of P2 will be described. A case will be described in which the automatic opening and closing hinges P1 and P2 of each of the above embodiments are applied to a stage device that can be stowed on the wall surface W and stored.

The stage device Q1 is configured as shown in FIG. 10. The stage of the stage device Q1 has a stage main body 201 provided on a stage girder 202 and stage legs 205 to 208 provided on the stage girder 202. . Here, the stage leg 205 located in the front row is rotatably attached to a support bracket 203 attached to the stage girder 202.
Is provided with a wheel holder 209 provided with wheels 210. A support fitting 214 is provided at the lower end near the wall surface, and the arm S1 is rotatably mounted on the support fitting 214.
Is attached. The distal end of the arm S1 is connected to a stage girder 202 of the stage, and automatic connecting hinges P1 and P2 are provided at this connection portion.

The operation of the stage device Q1 having the above configuration will be described.
1 is at the position indicated by C in FIG. Then, when the stage is deployed and put into the use state, the automatic opening / closing hinges P1 and P2 are opened to rotate the arm S1 from B to the position indicated by A, so that the stage becomes parallel to the floor surface F. To do. Conversely, to change the stage from the deployed state to the housed state, the automatic opening and closing hinges P1 and P2 are closed, and the arm S1 is rotated and housed in the positions shown from A to B, and further from B to C. Here, the stage device Q1 is provided with a limit switch (not shown) for detecting that it has been deployed and a limit switch (not shown) for detecting that it has been stored. The opening operation or the closing operation is stopped when the storage unit is in the storage state.

Next, the automatic opening / closing hinge P of each of the above embodiments will be described.
A case will be described in which the present invention is applied to a stage device in which P1 and P2 can be stored while being leaned against a wall surface W in a folded state.

The stage device Q2 is configured as shown in FIG. 11, and the stage is composed of a front stage and a rear stage. In the previous stage, a stage body 221-1 is provided on a stage girder 222-1.
Similarly, the rear stage is configured such that a stage body 221-2 is provided on the stage girder 222-2, and the stage leg 224 is mounted on the stage girder 222-2. I have. further,
The stage device Q2 is provided with a pair of swing arms 226 via a connecting portion 228, and ends of the respective swing arms 226 are connected to stage girders 222-1 and 222-2 in the front stage and the rear stage. . The automatic opening / closing hinges P1 and P2 of this embodiment are provided at this connection portion.

The operation of the stage device Q2 having the above configuration will be described. In FIG. 11, a solid line indicates a state where the stage is expanded. In this state, when the automatic opening / closing hinges P1 and P2 of the present embodiment are deployed in the direction indicated by B in the drawing, the angle between the two swing arms 126 is reduced, and the front stage and the rear stage are folded. And can be stored in a state of leaning against the wall surface W. In particular, in the stage device Q2, since the stage can be folded and stored, it is not necessary to take a storage space so high from the floor F. In the case of the stage device Q2 as well, a limit switch (not shown) for detecting that it has been deployed and a limit switch (not shown) for detecting that it has been stored are provided. In the case of becoming or the storage state, the opening operation or the closing operation is stopped.

In the above description of the application example, the case where the present invention is applied to a stage device is described. However, the present invention is not limited to this, and the present invention can be applied to any member that requires an opening / closing mechanism.

[0053]

According to the automatic opening and closing device according to the first aspect of the present invention, the opening and closing hinge is formed by moving the nut into the torsionally formed cylinder by rotating the thread groove forming shaft. The space in the direction perpendicular to the direction can be reduced, and the space in the axial direction can be reduced, so that the entire apparatus can be extremely miniaturized. In particular, since the nut is screwed to the shaft in the cylinder, the cost can be reduced. Also,
Regarding the opening and closing angle of the two members that open and close, the member that opens and closes gradually opens and closes due to the rotation of the thread groove forming shaft. Therefore, the opening and closing angle can be extremely finely controlled by controlling the rotation speed of the screw groove forming shaft. .

Further, in the automatic opening and closing device according to the second aspect, the shaft is provided parallel to the shaft and inserted through the eccentric position of the nut as the rotation restricting portion. The nut cannot be rotated around the groove forming shaft, and the nut can be moved along the screw groove forming shaft by rotating the screw groove forming shaft. Here, in the present invention,
Since the rotation restricting portion is formed by the shaft, it can contribute to cost reduction.

Further, in the automatic opening and closing device according to the third aspect, since the cylindrical body of the first hinge piece and the cylindrical body of the second hinge piece are alternately arranged, the opening and closing of the shaft, the nut and the like are performed. Since the mechanism is concealed, the appearance is similar to that of the conventional hinge member, without deteriorating the aesthetic appearance, and is excellent in safety. In particular, as in the automatic opening / closing device according to the fourth aspect, if the second hinge piece has three or more cylinders to support the rotation restricting portion at an intermediate position, the rotation restricting portion may bend. And a stable opening and closing operation can be obtained.

In the structure of the fifth aspect, since the torsion angle is formed by changing the position in the axial direction of the cylindrical body, the opening / closing speed of the hinge can be changed. If the torsion angle near the both ends is reduced and the torsion angle near the center is increased, the opening and closing operation will rotate slowly at the beginning, then the rotation speed will increase, and at the end of the opening and closing operation it will rotate again slowly. Operation can be realized. Next, according to the automatic opening / closing device having the configuration of the sixth aspect, since the motor has a substantially elongated cylindrical shape, the space in the direction perpendicular to the axial direction of the shaft can be reduced, and the device can be further downsized. it can.

Further, according to the retractable stage device of the seventh aspect, the space for the hinge mechanism can be reduced, so that no extra space is required. In particular, the space in the direction perpendicular to the axial direction is reduced. By reducing the size, it can be easily applied to a low-floor type stage.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of an automatic opening / closing hinge according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of an automatic opening / closing hinge according to a first embodiment of the present invention.

FIG. 3 is an explanatory view showing a main part of an opening / closing mechanism according to the first embodiment of the present invention.

4A and 4B are diagrams showing a configuration of a nut in the first embodiment according to the present invention, wherein FIG. 4A is a perspective view thereof, and FIG.
Is a front view thereof, and (c) is a side view thereof.

FIG. 5 is a view showing another embodiment of the nut according to the present invention, wherein (a) is a perspective view, (b) is a front view, and (c) is a side view.

FIG. 6 is a view showing another embodiment of the nut according to the present invention, wherein (a) is a perspective view, (b) is a front view, and (c) is a side view.

FIG. 7 is an explanatory view showing another configuration of the cylindrical body.

FIG. 8 is a perspective view showing a configuration of an automatic opening / closing hinge according to a second embodiment of the present invention.

FIG. 9 is a partially broken perspective view showing a configuration of an automatic opening / closing hinge according to a second embodiment of the present invention.

FIG. 10 is an explanatory diagram showing a configuration of a stage device to which an automatic opening / closing hinge according to the present invention is applied.

FIG. 11 is an explanatory diagram showing a configuration of a stage device to which the automatic opening / closing hinge according to the present invention is applied.

[Explanation of symbols]

2, 4 frame 10, 120 shaft 12 rotation regulating shaft 20 opening / closing mechanism section 22 torsion square tube 24 fixing member 30a, 30b, 30c, 130 nut 40 driving section 42 motor 44, 46 motor supporting section 48 coupling 102 first hinge Piece 112 Second hinge piece 104-1, 104-2, 114-1, 114-2, 1
14-3 Cylindrical part 122 Rotation regulating member Q1, Q2 Stage device

Claims (7)

(57) [Claims] 1. The method according to claim 1, wherein the relative angle between the two members is changed to
An automatic opening / closing device for opening and closing two members, wherein a screw groove forming shaft having a screw groove formed therein ,
And <br/> thread groove formed shaft which is rotatably supported on either one side of one of the members, the drive unit for rotating the screw groove forming shaft, the two
Member in which the thread groove forming shaft is supported
A driving unit provided on the side of the nut, a nut screwed with the screw groove forming shaft, and an inner peripheral portion which is slidable in the axial direction inside the nut and gradually rotates as the nut moves in the axial direction. the screw of the twisting is in decorated with the cylindrical body, the two members
The groove forming shaft is installed on the side of a member different from the
A cylindrical body that is kicked, a rotary regulating portion for regulating a rotation about the screw groove formed shaft above the nut, the Ne of the two members
A shaft provided on the side of the member on which the
An automatic opening / closing device, comprising: a rotation restricting portion . 2. The automatic opening / closing device according to claim 1, wherein the rotation restricting portion is a shaft disposed parallel to the shaft and inserted through an eccentric position of the nut. 3. A screw groove forming shaft having a screw groove formed therein, a driving unit for rotating the screw groove forming shaft, a nut screwed with the screw groove forming shaft, and the nut sliding inside in the axial direction. A first hinge piece having one or a plurality of cylinders which are movable and whose inner peripheral portion is twisted so as to rotate gradually as the nut moves in the axial direction; and a cylinder body of the first hinge piece. A second hinge piece having a plurality of cylindrical bodies disposed on the inner peripheral wall of the cylindrical body, a pair of substantially rod-shaped rotation restricting members provided on both sides of the nut shaft A second hinge piece having a rotation restricting member that fits and restricts rotation of the nut in the rotation direction, and rotatably mounts the thread groove forming shaft.
And a second hinge piece provided with the drive section, and the first hinge piece is formed by driving the drive section.
The fact that the relative angle of the second hinge piece changes to open and close
Automatic opening and closing device. 4. A structure in which three or more cylinders provided on the second hinge piece are provided, and another cylinder supports a rotation regulating portion provided between the cylinders at both ends. Item 3
The automatic opening / closing device according to claim 1. 5. The automatic machine according to claim 1, wherein the torsion angle in the torsion processing performed on the cylindrical body is changed depending on the position of the cylindrical body in the axial direction. Switchgear. 6. The motor according to claim 1, wherein the drive unit is a motor operatively connected to the thread forming shaft, the motor having a substantially elongated cylindrical shape. Automatic switchgear. 7. A retractable stage device equipped with the automatic opening / closing device according to any one of claims 1 to 6.