JP2006257858A - Opening/closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an opening/closing device which enables an opening/closing body reaching a fully opened position to be kept in the fully opened position by using a return spring. <P>SOLUTION: This opening/closing device is equipped with a return spring which makes the pressure of a return spring force accumulated when a winding body for winding/unwinding the opening/closing body is turned in one direction, and which makes the return spring force utilized for the turning of the winding body in the other direction. The opening/closing device establishes the relationship: T<SB>1</SB>-T'<SB>1</SB>≤πEbh<SP>3</SP>N<SB>1</SB>/6L<SB>1</SB>. In the relationship, E represents a modulus of elasticity of a power spring as the return spring; b represents a width dimension; h represents a thickness dimension; L<SB>1</SB>represents the effective length, in the state of mutual noncontact with the inside and the outside, of the overall length of the winding of the power spring in the full opening of the opening/closing body; N<SB>1</SB>represents the number of the times of the winding of the power spring in terms of the effective length L<SB>1</SB>; T<SB>1</SB>represents self-weight torque around the central axis of the winding body, which is brought about by the self-weight of the opening/closing body in the fully opened state; and T'<SB>1</SB>represents upward resistance torque around the central axis of the winding body when the opening/closing body in the fully opened state is to be downward moved for closing. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a winding body that opens and closes the opening and closing body by winding and unwinding the opening and closing body, and a return spring force accumulated during rotation to one of the winding body that closes and moves the opening and closing body downward. The present invention relates to an opening / closing device provided with a mainspring spring used for rotating the winding body to open and move it to the other side, for example, a shutter device for disaster prevention in which the opening / closing body is a shutter curtain and an opening The present invention can be used for various shutter devices including a shutter device, and opening / closing devices such as a roll blind device, an awning device, and a smoke curtain device.

In Patent Document 1 below, a winding body for winding up a shutter curtain that is an opening / closing body and moving the shutter curtain up and down to open and close, and a winding body for closing and moving the shutter curtain downward are disclosed. A return spring force is accumulated during rotation to one of the two, and the accumulated return spring force is utilized for rotation to the other of the winding body for upward movement of the shutter curtain; A shutter device configured to include the is shown. The return spring used in this shutter device serving as an opening / closing device is a torsion coil spring.
Japanese Patent No. 2697541 (paragraph numbers 0007 and 0008, FIG. 2)

  When the shutter curtain that moves up and down is moved from the fully closed position or from the middle position to the fully opened position, it is preferable to maintain the shutter curtain in the fully opened position in order to ensure easy operation of the shutter curtain. The above-described return spring is desired to have a spring characteristic capable of realizing such a fully open position maintaining characteristic of the shutter curtain.

  An object of the present invention is to provide an open / close device that can return an open / close body that has reached a fully open position to the fully open position and maintain it with a spring.

The opening / closing apparatus according to the present invention is one of a winding body for winding and unwinding the opening / closing body to move the opening / closing body up and down, and one of the winding body for closing and closing the opening / closing body. A return spring force is accumulated during rotation to the return spring, and the accumulated return spring force is utilized for rotation to the other side of the winding body for upward movement of the opening and closing body; The return spring is a mainspring spring, the elastic coefficient of the mainspring spring is E, the width dimension is b, the thickness dimension is h, and the opening and closing body is fully opened. Of the total length of the mainspring spring wound, an effective length that is not in contact with the inside or outside is L ₁ , the number of windings of the mainspring spring with respect to this effective length L ₁ is N ₁ , and the opening / closing at the time of full opening Of the wound body by its own weight The weight torque heart axis T _1, the frictional force or the like generated between the guide member for guiding the movement of the closing body and the closing member when the closing member at the time of the fully opened attempts to move closed downward the 'when a _{1, T} 1 -T' an upward resisting torque around the center axis of the winding body T relationship ^{_{1 ≦ πEbh 3 N 1 / 6L}} 1 is characterized in that has a structure which satisfies based Is.

  As described above, the mainspring spring using the return spring force can be interpreted as a cantilever having one end as a fixed end and the other end as a free end. Therefore, when the elastic modulus of this cantilever is E, the section modulus is I, the length is L, and the bending moment (torque) T is applied to the cantilever, the deflection angle at the free end of the cantilever When θ (radian) occurs, the equation T = EIθ / L is established in terms of material mechanics.

Then, when the width of the spiral spring b, and thickness is h, the section modulus I of the spiral spring is I = bh ^3/12. Further, the deflection angle θ is a value corresponding to the number of windings N of the mainspring spring, and the deflection angle θ when the number of windings is 1 is θ = 2π.

For this reason, when the number of windings of the mainspring spring is N, the above T = EIθ / L can be rewritten as T = πEbh ³ N / 6L. In this case, T is a torque around the winding center due to the return spring force of the mainspring spring generated by winding of the mainspring spring, and L is an effective length in which the number of turns of the mainspring spring is N. That is, it becomes the length of the part which is not contacting inside and outside among the full length wound. This is because an original spring force is not generated by the contact between the inner and outer portions of the entire wound length.

For this reason, in the present invention, as described above, the mainspring spring as a return spring has an elastic coefficient E, a width dimension b, a thickness dimension h, and the mainspring spring is wound when the opening / closing body is fully opened. The effective length that is not in contact with the inside and outside of the entire length is L ₁ , the number of windings of the mainspring spring for this effective length is N _{1, and} the center axis of the winding body by the dead weight of the opening and closing body when fully opened The center axis of the winding body based on the frictional force generated between the opening / closing body and the guide member that guides the movement of the opening / closing body when the self-weight torque is T ₁ and the opening / closing body when fully opened is closed and moved downward A stopper member such as a lintel is arranged at the fully open position by adopting a configuration in which the relationship of T ₁ −T ′ ₁ ≦ πEbh ³ N ₁ / 6L ₁ is established, where T ′ ₁ is the upward resistance torque If open, fully open The opening / closing body that has reached the position can be maintained in the fully open state in which the stopper member is brought into contact with the return spring force of the mainspring spring, and the fully open position is not defined by a stopper member such as a lintel. The open / close body that has reached the fully open position can be maintained in the fully open state by the cooperation of members, means, devices, etc. that define the fully open position and the return spring force of the mainspring spring.

  As described above, it is only this return spring force to use the accumulated return spring force of the mainspring spring to rotate the winding body for the upward movement of the opening / closing body to the other side. For example, the return spring force is used to assist the opening / closing body opening movement force that acts on the opening / closing body or the winding body such as a manual operation force. It may be.

  Further, the opening / closing body opening moving force may be a driving force of a driving device such as an electric motor, and the present invention can return the mainspring spring as described above even in the case of an opening / closing device equipped with such a driving device. Since the opening / closing body can be maintained in the fully open position by the spring force, it is not necessary to provide a brake for stopping the opening / closing body in the fully open position in the drive device or the like.

Further, in the present invention, the effective length which is not in contact with one inside the other of the full-length are wound in the spiral spring in the fully closed position of the opening-and-closing member L _2, the power spring of this effective length L ₂ The number of windings is N ₂ , the self-weight torque around the central axis of the winding body due to the weight of the opening and closing body when fully closed is T ₂ , and the opening and closing body and the opening and closing of the opening and closing body when the opening and closing body tries to open upward when fully closed The downward resistance torque around the central axis of the winding body based on the frictional force generated between the guide member and the guide member that guides the movement of the body is T ′ _2, and πEbh ³ N ₂ / 6L ₂ ≦ T ₂ + T ′ _Two relationships may be established.

  When the above relationship is established, the opening / closing body that has reached the fully closed position can be maintained in the fully closed position without being moved from the fully closed state by the return spring force of the mainspring spring.

Therefore, as described above, the relationship of T ₁ −T ′ ₁ ≦ πEbh ³ N ₁ / 6L ₁ is established, and the relationship of πEbh ³ N ₂ / 6L ₂ ≦ T ₂ + T ′ ₂ is also established. In this case, it is possible to realize a configuration in which the opening / closing body that has reached the fully open position maintains its fully open state, and the opening / closing body that has reached the fully closed position maintains its fully closed state without opening and moving from the fully closed state. It becomes possible.

Further, in the present invention, at an intermediate position that is a position before the opening / closing body reaches the fully open position, an effective length that is not in contact with the inside / outside of the entire length of the wound spring spring is expressed as L ₃ , The number of windings of the mainspring spring for this effective length L ₃ is N ₃ , the self-weight torque around the central axis of the winding body due to the weight of the opening / closing body at the midway position is T ₃ , and the opening / closing body at the midway position opens upward and moves When T ′ ₃ is the downward resistance torque around the central axis of the winding body based on the frictional force generated between the opening / closing body and the guide member that guides the movement of the opening / closing body, T ₃ + T The relationship ' ₃ <πEbh ³ N ₃ / 6L ₃ may be established, and this relationship may be established in the range from the midway position to the fully open position.

  According to this, after the opening / closing body is manually opened and moved from the fully closed position to the middle position, the opening / closing body can be automatically opened and moved to the fully opened position by the return spring force of the mainspring spring. In this way, the structure in which the opening / closing body is naturally opened and moved by the return spring force of the mainspring spring from the midway position to the fully open position has a long vertical opening / closing distance and is operated by hand or hand up to the fully open position. This is particularly effective for a switchgear that does not reach.

In the present invention, the above-described relationship of T ₁ −T ′ ₁ ≦ πEbh ³ N ₁ / 6L ₁ , the relationship of πEbh ³ N ₂ / 6L ₂ ≦ T ₂ + T ′ ₂ , T ₃ + T ′ ₃ <πEbh ³ The switchgear in which the relationship of N ₃ / 6L ₃ is established may be a switchgear having a single number of mainspring springs, and the number of the mainspring springs is a plurality arranged in the axial direction of the winding body. It may be a device.

  In the case of a switchgear in which the number of mainsprings is a plurality arranged in the axial direction of the winding body, the elastic modulus E and the thickness dimension h of these mainspring springs are the same, and these Since the total width dimension of the mainspring spring is b, the opening / closing body that has reached the fully open position can be maintained in the fully open state, or the opening / closing body that has reached the fully closed position can be opened from the fully closed state. Maintain the fully closed state without moving, and after manually opening and moving the opening / closing body from the fully closed position to the middle position, open / close the opening / closing body to the fully open position by the return spring force of the mainspring spring. In addition, the plurality of mainsprings can be manufactured using the same material and the same thickness. In addition, the width dimension of the plurality of mainspring springs whose total width dimension is b may be the same width dimension for all the mainspring springs, or may be a different width dimension for all the mainspring springs. The same width dimension may be used for the mainspring spring, and different width dimensions may be used for the other mainspring springs.

  The present invention described above can be applied to an opening / closing device in which the opening / closing movement direction of the opening / closing body is the vertical direction. The vertical direction may be the vertical direction or the vertical direction having an inclination angle with respect to the vertical direction.

  Further, in the present invention, the fully open and fully closed of the opening / closing body may be that the opening such as an entrance / exit that is opened / closed by the opening / closing body is fully opened or fully closed, or the rotational speed of the winding body or the opening / closing body It may be defined by a winding limit, a feeding limit, etc. of the opening / closing body by the winding body set by the length of the guide member that guides the opening / closing movement of the opening / closing member.

  Further, in the present invention, when the number of the mainspring springs is a plurality arranged in the axial direction of the winding body, the winding body includes at least a central shaft that does not rotate during winding and unwinding of the opening and closing body, A plurality of rotating bodies, each of which is rotatable forward and backward around the central axis for winding and opening and closing the opening / closing body, and is arranged on the outer periphery of the central axis and spaced apart in the axial direction. The mainspring is provided on at least two of these rotary bodies, and one end of each of the mainspring springs is bent to one side in the circumferential direction of the winding body and locked to the central axis side. In addition, the other end of the mainspring spring is bent to the other side in the circumferential direction of the winding body and locked to the rotating body side, and the at least two rotating bodies provided with the mainspring spring are connected to the central shaft. Rising part rising in diameter direction and central axis A cylindrical portion having a width in the axial direction, and locking the other end of the mainspring spring to the cylindrical portion, and the cylindrical portion of the at least two rotating bodies to the rising portion It is preferable to arrange them on the same side of the central axis in the axial direction.

  According to this, one end of the mainspring spring can be locked to the central axis side by effectively utilizing the tightening force of the return spring force, and the other end can be locked to the cylindrical portion of the rotating body. For these rotating bodies, the shapes of these rotating bodies can be made common, thereby reducing the manufacturing cost of the entire winding body configured to include these rotating bodies. Each of the mainspring springs provided in the at least two rotating bodies may be a mainspring spring having the same winding direction, and the common use of the mainspring springs can also be achieved.

  The above-mentioned “center axis that does not rotate at the time of winding and unwinding the opening / closing body” may be an axis that does not always rotate, or, for example, a predetermined return spring force is applied to the mainspring spring. This means that when performing a tightening operation for accumulating pressure, the central axis may be rotated.

  Further, the interval between the plurality of rotating bodies arranged in the axial direction on the outer periphery of the central shaft is arbitrary, and when the number of rotating bodies is three or more, the intervals are the same. In addition, when the number of rotating bodies is two or more, all the rotating bodies or a part of the rotating bodies may be arranged in contact with each other.

  Furthermore, in the present invention, the number of rotating bodies may be two, or three or more.

  When the number of rotating bodies is 3 or more and a mainspring spring is provided for all of these rotating bodies, the cylindrical portion is the same in the axial direction of the central axis with respect to the rising portion for all of these rotating bodies. By arranging them on the side, all the shapes of these rotating bodies can be made common, that is, all the rotating bodies can have the same shape and structure, and there is no need to prepare rotating bodies having different shapes and structures. .

  In addition, in order to lock one end of the mainspring spring to the central axis side, a groove, slit, or protrusion provided directly on the central axis with one end of the mainspring spring bent to one side in the circumferential direction of the winding body The core member may be locked to the locked portion by a hole or the like, or the core member is fixed to the rotating body on which the mainspring spring is provided on the central axis, and the grooves, slits, and protrusions provided on the core member Alternatively, one end of the mainspring spring may be locked to the locked portion by a hole or the like.

  According to the latter, one end of the mainspring spring is locked to a winding core member prepared for each rotating body on which the mainspring spring is provided. Therefore, for each mainspring spring, the rotating body, the mainspring spring and the winding are provided. One mainspring spring unit including the core member can be formed. For this reason, an effect of facilitating the arrangement work of the mainspring spring on the central axis can be obtained.

  Further, the structure of the rotating body provided with the mainspring spring may be any structure as long as it has the rising portion and the cylindrical portion. For example, the rising portion and the cylindrical portion are integrated by press molding or the like. Or a first member that forms a rising portion and a second member that forms a cylindrical portion, and is formed by combining these first and second members. It may be a dish.

  When the rotating body is formed to include a first member that forms the rising portion and a second member that forms the cylindrical portion, and is formed by the combination of the first member and the second member, Since the rotating body can be a product having a divided structure including the first member and the second member, the rising portion and the cylindrical portion can be easily formed, and the other end of the mainspring spring is locked. The operation of forming the locked portion on the cylindrical portion can be easily performed.

  In addition, as described above, when the number of the mainspring springs is a plurality arranged in the axial direction of the winding body, the winding body includes at least a central shaft that does not rotate during winding and unwinding of the opening / closing body. A plurality of rotating bodies, each of which is rotatable forward and backward around the central axis for winding and opening and closing the opening / closing body, and is arranged in the axial direction on the outer periphery of the central axis. These rotating bodies are connected to each other by a connecting member, and the core member is selectively coupled to the central axis for each of the rotating bodies having the same number as the number of the mainspring springs, and is rotatable. By arranging these core members on the outer periphery of the central shaft and rotating these core members manually or by a drive device with respect to the central shaft, one end is coupled to the rotating body and the other end is coupled to the core member. The mainspring can be tightened It may be so.

  According to this, the magnitude | size of the return spring force of a mainspring spring can be adjusted by winding of a mainspring spring, and, thereby, the return spring force which functions as mentioned above can be obtained.

  Furthermore, the opening / closing apparatus according to the present invention may be such that the rotation of the winding body for opening and closing the opening / closing body is manually operated, and a driving device using an electric motor or the like for rotating the winding body And the winding body may be rotated by a driving force from the driving device. In other words, the present invention can be applied to a manual switchgear and can also be applied to an automatic switchgear, and the present invention can also be applied to a manual and automatic combination switchgear. Furthermore, the present invention can be applied to a self-weight closing type opening / closing device in which the opening / closing body is closed and moved by its own weight, and a self-weight manual opening / closing device in which the opening / closing body is closed and moved by both its own weight and manual operation force.

  When the opening / closing device is provided with a driving device such as an electric motor for rotating the winding body, the driving device can be arranged at an arbitrary place. One example thereof is that the at least two rotating bodies provided with the mainspring springs are arranged adjacent to each other in the axial direction of the central axis, and the driving device is arranged between these rotating bodies.

  According to this, the drive device can be arranged by effectively using the space between the two rotating bodies. In addition, since the mainspring spring has a smaller width dimension in the axial direction of the central axis than a torsion coil spring or the like, it is possible to reduce the axial length dimension of the entire winding body including the driving device. The entire switchgear can be set to an arbitrary size, and the size can be reduced as necessary.

  Further, as described above, when a driving device is disposed between the at least two rotating bodies arranged adjacent to each other in the axial direction of the central axis, the interval between the rotating bodies is determined by the driving device. As long as there is a size that can be disposed, it may be the same as the size of the driving device, or may be larger than this size.

  Furthermore, the present invention can be applied to any opening / closing device. That is, the present invention can be applied to any opening / closing device such as a shutter device whose opening / closing body is a shutter curtain, a roll blind device, an awning device, a smoke proof curtain device, etc. It may be a shutter device for an opening that opens and closes with a shutter curtain, a shutter device for disaster prevention for forming a disaster prevention zone with a shutter curtain that is fully closed, a shutter device for a garage, or a shutter device for storage Further, it may be a platform for a vehicle such as a truck or a shutter device for a container. The disaster prevention shutter device includes an elevator disaster prevention shutter device in which the shutter curtain is closed and moved between the elevator and the elevator hall in the event of a disaster such as a fire. A shutter device is also included in which the shutter curtain is closed or opened and closed for people to enter and exit, and the shutter curtain is opened so that a fire extinguishing operation can be performed in the event of a disaster such as a fire.

  In addition, when the present invention is applied to a shutter device, the shutter curtain may be formed of an arbitrary material. That is, the shutter curtain may be formed by connecting a plurality of slats or a plurality of slats, or a plurality of pipes connected by links. May be formed of a thin member such as cloth or sheet, may be formed of a net, or may be formed of at least two of these.

  According to the present invention, the opening / closing body that has reached the fully open position can be returned to the fully open position and maintained by the spring.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 is an overall front view of a shutter device that is an opening / closing device according to the present embodiment, and this shutter device is an entrance / exit shutter device for opening / closing a building entrance / exit 10 with a shutter curtain 1 that is an opening / closing body. It is. The shutter device is of a manual type in which the shutter curtain 1 is closed and moved downward by its own weight and manual operation, and the shutter curtain 1 is opened and moved upward by manual operation.

  Guide rails 2 extending vertically are attached to a building housing 11 made of walls, pillars, and the like that form both the left and right sides of the entrance 10, and both widthwise ends of the shutter curtain 1 are installed inside these left and right guide rails 2. The left and right ends of the shutter curtain 1 are slidably inserted, and the shutter curtain 1 is guided by a guide rail 2 as a guide member and can be opened and closed in the vertical direction. A shutter case 3 is disposed at the upper part of the entrance / exit 10, and a winding body 4 that can be rotated in the forward and reverse directions is supported by left and right brackets 5 and is installed horizontally in the shutter case 3. The upper end portion of the shutter curtain 1 is connected to the winding body 4, and the opening / closing movement of the shutter curtain 1 in the vertical direction is from the winding body 4 by rotating the winding body 4 in one of the forward and reverse rotations. The shutter curtain 1 is unwound, and the shutter curtain 1 is wound around the winding body 4 by rotating the winding body 4 to the other side. The shutter curtain 1 is opened and closed on the lower surface 3A of the shutter case 3. The shutter curtain 1 is inserted through the provided lintel slit.

  The shutter curtain 1 is configured to include a seat plate 1A provided at a lower end portion which is a front end portion on the closing side, and a plurality of slats 1B connected to the upper portion of the seat plate 1A. The seat plate 1A is a shutter case. The shutter curtain 1 is in the fully open position when it reaches the lintel height position of the lower surface 3A of the shutter 3, and when the seat plate 1A reaches the floor 10A of the doorway 10, the shutter curtain 1 is fully closed. Position. For this reason, the area from the fully open position to the fully closed position is the opening / closing movement area H of the shutter curtain 1.

  Among the many slats 1B constituting the shutter curtain 1, two predetermined left and right handle portions 6 are provided on a predetermined slat 1B which is at the same height as the waist when the shutter curtain 1 is in the fully closed position. When the shutter curtain 1 is in the fully closed position, it is possible to lift the shutter curtain 1 by placing a hand on the handle portion 6 or engage the tip of the operation rod with the seat plate 1A. By raising the shutter curtain 1, the shutter curtain 1 is wound around the winding body 4 that rotates to the other of the forward and reverse rotations by this raising, and the shutter curtain 1 is moved to the fully open position. Can be made. Further, the tip of the operating rod is locked to the seat plate 1A of the shutter curtain 1 that has reached the fully open position, and the shutter curtain 1 is lowered with this operating rod, or the shutter 6 is pushed down by placing a hand on the handle 6. By performing or not performing the winding body, the shutter curtain 1 is rotated to the one of the forward and reverse rotations by lowering or pushing down by utilizing the dead weight of the shutter curtain 1. It is possible to draw out from 4 and move to the fully closed position.

  FIG. 2 shows the structure of the winding body 4. The winding body 4 is connected to the central axis 20 that is a non-rotating axis that does not rotate and the upper end of the shutter curtain 1, and can rotate forward and backward about the central axis 20. A rotating cage body for unwinding the shutter curtain 1 to rotate and move the shutter curtain 1 to close and move the shutter curtain 1 and winding the shutter curtain 1 to open and move the shutter curtain 1 by rotation to the other. The center shaft 20 is supported by the left and right brackets 5 described with reference to FIG. The rotating cage body 21 has a plurality of central axes 20 penetrating through the central portion, in the illustrated example, four rotating bodies 22 and a length extending in the axial direction of the central axis 20, and the axial direction of the central axis 20. And a bar-like member 23 serving as a connecting member for connecting these rotary bodies 22 arranged apart from each other, and the bar-like member 23 made of a pipe, a flat bar or the like is used as the winding body 4. Are provided in the circumferential direction.

  All of the four rotating bodies 22 that are each rotatable forward and backward with respect to the central axis 20 have the same shape and structure, and FIG. 3 shows one of these rotating bodies 22. It is a front sectional view. 4 is a cross-sectional view taken along line S4-S4 in FIG. 3, and FIG. 5 is a cross-sectional view taken along line S5-S5 in FIG. As shown in FIG. 3, the rotating body 22 has a cup shape in which one end portion in the axial direction of the central shaft 20 is substantially closed, and the other end portion 24B is open. A combination of the member 24 and a wheel member 25 which is disposed on the side of the open end 24B of the cup-shaped member 24 and serves as an end member having the open end 24B as a substantially closed end. It is a union by. A mainspring spring 26 spirally wound from one end to the other end is accommodated in the internal space S of the cup-shaped member 24.

  As shown in FIG. 2, the mainspring springs 26 are provided on all the rotating bodies 22, and the mainspring springs 26 are made of the same material and have an elastic coefficient, thickness, width, and the like. It is produced by winding a plate material having the same dimensions and the same overall length in the same direction by the same number of times. If the total width is the same, the width of each mainspring may be different, or the width of some mainsprings may be the same and the width of other mainsprings may be different. Also good.

  As shown in FIG. 3, the wheel member 25 includes an annular flange portion 25 </ b> A forming an outer peripheral surface, and an end surface portion provided at one end portion in the axial direction of the central shaft 20 in the annular flange portion 25 </ b> A. 25B, and the bar-like member 23 for connecting the rotary members 22 to each other is inserted and coupled to the end face portion 25B. Further, the wheel member 25 has the other end portion 25C in the axial direction of the center shaft 20 that is open facing the cup-shaped member 24 and the end surface portion 25B facing the cup-shaped member 24 side. It is connected to the member 24. In this connection, the projecting piece 24D formed on the end portion on the opening end 24B side of the body portion 24C of the cup-shaped member 24 which is a sheet metal press-formed product is replaced with a hole formed in the end surface portion 25B of the wheel member 25. After insertion into 25D, the projecting piece 24D is bent (see also FIG. 4).

  From the above, in the present embodiment, the end surface portion 25B of the wheel member is the rising portion of the rotating body 22 rising in the diameter direction of the central shaft 20, and the body portion 24C of the cup-shaped member is the central shaft 20 This is a cylindrical portion of the rotating body 22 having a width in the axial direction. The wheel member 25 is a first member that forms the rotating body 22, and the cup-shaped member 24 is a second member that forms the rotating body 22.

  As shown in FIG. 3, the wheel member 25 has an outer diameter larger than that of the cup-shaped member 24, and the annular flange portion 25 </ b> A of the wheel member 25 forming a portion of this outer diameter is shown in FIG. 4. As shown in the figure, it is not a perfect circle centered on the central axis 20, but is a substantially spiral deformed circle whose distance from the central axis 20 gradually changes as it extends in the circumferential direction. . For this reason, the annular flange portion 25A is formed with a step portion 25E that is depressed in the diameter direction of the central shaft 20, and the upper end portion of the shutter curtain 1 is a coupling tool such as a bolt in the step portion 25E of each rotating body 22. The wheel member 25 is coupled to the outer surface of the annular flange portion 25A. For this reason, the annular flange portion 25 </ b> A in each rotating body 22 is a portion in the winding body 4 for winding up and feeding out the shutter curtain 1.

  The wheel member 25 having such an annular flange portion 25A is connected to the cup-shaped member 24 with the open end 25C facing away from the cup-shaped member 24 as described above. Thus, even if the coupling tool for coupling the upper end portion of the shutter curtain 1 to the outer surface of the annular flange portion 25A is a bolt, a nut or the like having a portion protruding toward the inner surface side of the annular flange portion 25A, this coupling operation is performed. The operator can easily do this by inserting a hand, a tool, or the like through the open end 25C.

  Further, as shown in FIG. 2, the core member 27 is arranged at a position corresponding to the arrangement position of each rotating body 22 on the outer peripheral surface of the central shaft 20. As shown in FIG. 3, these core members 27 are fixed to the central shaft 20 by the couplers 28 and 29, so that the core member 27 is not rotated as with the central shaft 20. It has become. As can be seen from FIG. 4, the coupler 28 is a bolt screwed into the core member 27 and the tip is pressed and fixed to the central shaft 20. The coupler 29 shown in FIG. It consists of a bolt that penetrates the core member 27 and the central shaft 20 and a nut that is screwed to the tip of this bolt that protrudes on the opposite side of the core member 27.

  Further, as can be seen from FIGS. 4 and 5, the core member 27 is a round pipe member, and the core member 27 corresponds to the arrangement position of the cup-shaped member 24 as shown in FIG. A slit 27A extending to the middle in the axial direction is formed at the position where the winding is performed, and receiving pieces 27B are formed at both ends in the axial direction of the core member 27 by cutting down, so that the circumferential direction of the core member 27 etc. The core member 27 is arranged coaxially with the central shaft 20 by the receiving pieces 27B formed in plural at intervals. In other words, the core member 27 is the same or substantially the same from the central shaft 20 over the entire circumference. It is arranged on the central axis 20 with a gap of a size.

  As shown in FIG. 3, holes 30 and 31 through which the central shaft 20 and the core member 27 are inserted are formed in the end surface portion 24 </ b> A of the cup-shaped member 24 and the end surface portion 25 </ b> B of the wheel member 25. Since these holes 30 and 31 are holes in which the core member 27 is loosely coupled with a slight gap therebetween, the end portion by the end surface portion 24A of the cup-shaped member 24 and the end portion by the end surface portion 25B of the wheel member 25 are provided. The part is a substantially closed end. For this reason, the internal space S of the cup-shaped member 24 is a substantially sealed space. Thus, the internal space S in which the mainspring spring 26 is housed is a substantially sealed space. Further, rust caused by moisture in the air is not easily generated, and the mainspring spring 26 is substantially cut off from an external force, and the mainspring spring 26 can be protected from the external environment.

  In addition, in order to make this internal space S in which the mainspring spring 26 is accommodated into a substantially sealed space or a sealed space with further improved sealing performance, it is attached to the cup-shaped member 24 and the wheel member 25 and rotated with the core member 27. The holes 30 and 31 may be closed by a sealing member that freely contacts.

  As shown in FIG. 3, a bearing 35 is disposed between the wheel member 25 and the core member 27, and the wheel member 25 and the cup-shaped member 24 are rotatable with respect to the core member 27 by the bearing 35. It has become. A plurality of bearings 35 are disposed in the circumferential direction between the outer ring member 35A, the inner ring member 35B, and the outer ring member 35A and the inner ring member 35B. Each of the bearings 35 is rotatably held by a retainer 35C. The outer ring member 35A is fastened to the end face 25B of the wheel member 25 by a fastening tool 36 (see FIG. 4) such as a rivet, and the inner ring member 35B is a coupling tool described above. 28 is coupled to the central shaft 20 together with the core member 27.

  As shown in FIG. 5, an inner end portion 26 </ b> A that is one end portion of the mainspring spring 26 disposed in the inner space S is bent to form a slit 27 </ b> A that is a locked portion of the core member 27. It is locked. Further, the outer end portion 26B, which is the other end portion of the mainspring spring 26, is bent to be locked to the locked piece 24E of the body portion 24C of the cup-shaped member 24. The locked piece 24E having a length extending in the circumferential direction of the winding body 4 is partially formed when the bulging portion 24F in the outer diameter direction is formed on the body portion 24C by press molding or the like. It is formed by leaving without cutting out.

  Thus, the inner end portion 26A of the mainspring spring 26 is coupled to the core member 27 which is coupled to the central shaft 20 disposed at the center of the winding body 4 and is a non-rotating member, and the outer end portion 26B. Is coupled to a cup-shaped member 24 that is a constituent member of the rotating body 22 that is rotatable about the central axis 20. Further, the winding direction of the mainspring spring 26 is rotated around the central axis 20 in the direction in which the shutter curtain 1 wound around the annular flange portion 25A of the wheel member 25 is unwound (in FIG. The mainspring 26 is in a direction to be tightened when it is rotated. Then, the inner end portion 26A and the outer end portion 26B of the mainspring spring 26 are bent in the circumferential direction of the winding body 4 so that the latched pieces of the slit 27A of the core member 27 and the trunk portion 24C of the cup-shaped member 24 are engaged. 24E, the inner end portion 26A and the outer end portion 26B are bent in opposite directions, and the bending direction is the annular flange portion of the wheel member 25 as described above. When the winder 4 is rotated about the central axis 20 in the direction in which the shutter curtain 1 is wound around 25A, the inner end portion 26A and the outer end portion 26B are separated from the slit 27A and the locked portion 24E. Instead, the mainspring spring 26 can be wound up.

  For this reason, when the shutter curtain 1 is drawn out from the winding body 4 and closed, the return spring force is accumulated in the mainspring spring 26 by winding, and the shutter curtain 1 is moved to open. When the winding body 4 is wound, the accumulated return spring force is used as an auxiliary force for assisting the rotation of the winding body 4. As a result, when the shutter curtain 1 is opened and moved upward by manual operation using the handle portion 6 or the operating rod described above, this opening movement can be performed lightly.

  FIG. 6 shows an initial state of winding of the mainspring spring 26, and FIG. 7 shows an end state of winding. In the initial stage of winding shown in FIG. 6, the outer layer portion of the mainspring spring 26 is a tightly wound portion 26C in which two winding portions adjacent inside and outside are in contact with each other, and the inner layer portion is adjacent to the inside and outside. The two coiled portions 26D are coarsely coiled portions 26D that are not in contact with each other. At the end of tightening in FIG. 7, the outer layer portion of the mainspring spring 26 is in contact with the two coiled portions adjacent to each other inside and outside. The inner layer portion is a tightly wound portion 26F in which two adjacent winding portions are in contact with each other. For convenience of understanding, the closely wound portions 26C and 26F in FIGS. 6 and 7 are shown in a state where two adjacent winding portions inside and outside are not in contact with each other.

The elastic coefficient of each mainspring spring 26 is E, the thickness dimension is h, the total width dimension of all the mainspring springs 26 is b, and the mainspring springs 26 are in contact with each other inside and outside of the entire length of the wound mainspring 26. When the effective length that has not been set is L and the number of turns of the mainspring spring 26 for this effective length L is N, as described above, the return spring force of the mainspring spring 26 is caused by the tightening of the mainspring spring 26. The theoretical torque T around the central axis 20 is T = πEbh ³ N / 6L.

FIG. 8 is a graph in which the horizontal axis is the rotational speed of the winding body 4 and the vertical axis is the torque around the central axis 20 of the winding body 4. In FIG. 8, a change in the torque T expressed by the above formula (T = πEbh ³ N / 6L) of the mainspring spring 26 whose return spring force is increased by being tightened is shown by a line A. 8, the fully opened position of the shutter curtain 1 that coincides with the boundary position between the winding initial range α and the intermediate range β relating to the winding of the mainspring spring 26, and the boundary between the intermediate range β and the winding final stage γ. The fully closed position of the shutter curtain 1 that coincides with the position is shown.

When the mainspring spring 26 starts to be wound in the same direction as the direction in which the shutter curtain 1 is extended from the initial state of winding tightening in FIG. 6 in which most of the entire length of the mainspring spring 26 is in contact with the inside and outside, The closely wound portion 26 </ b> C in FIG. 6 that has been in contact is reduced, and the effective length L of the mainspring spring 26 is increased. However, since the effective length L at this time is still short and the number of windings N of the mainspring spring 26 with respect to this effective length L increases, the above formula (T = πEbh ³ N / 6L) gives As indicated by line A, the torque T gradually decreases as the rotational speed of the winding body 4 increases in the entire initial tightening range α and in the initial portion of the intermediate range β beyond the fully open position. Will increase at a large increase rate. Thereafter, the effective length L of the mainspring spring 26 becomes a constant value or a substantially constant value that is the same as or substantially the same as the entire length of the mainspring spring 26, and only the number of turns N increases, so the increase rate of the torque T gradually decreases. After that, the increasing rate of the torque T becomes a constant value or a substantially constant value. Thus, the transition of the increasing rate of the torque T to a constant value or a substantially constant value continues until the initial portion of the final tightening range γ beyond the fully closed position. When the mainspring spring 26 is further tightened, the tightly wound portions 26F that are in contact with each other inside and outside of FIG. 7 increase, the effective length L of the mainspring spring 26 decreases, and the number of turns N of the mainspring spring 26 also increases. From the above equation (T = πEbh ³ N / 6L), as shown by line A in FIG. 8, the increase rate of the torque T increases again in the intermediate portion and the final portion of the final tightening range γ. To do.

  In other words, the fully open position of the shutter curtain 1 is set to a position within a range where the increasing rate of the torque T of the mainspring spring 26 gradually decreases, and the fully closed position of the shutter curtain 1 is The increase rate of the torque T of the mainspring spring 26 is set at a position within a range where the torque T is a constant value or a substantially constant value.

  In FIG. 8, a change in torque around the central axis 20 of the winding body 4 required when the shutter curtain 1 is opened and moved upward is indicated by a line B. As for this torque, the weight of the shutter curtain 1 shown in FIG. 5 drawn out from the winding body 4 is caused by its own weight (including the weight of the seat plate 1A) W and the weight of the shutter curtain 1 upward. This is the total value of the resistance torque around the central axis 20 due to the resistance generated based on the friction between the guide rail 2 and the shutter curtain 1 shown in FIG. The dead weight torque due to the dead weight W of the shutter curtain 1 is the dead weight W and the horizontal distance R from the central portion of the central shaft 20 shown in FIG. 5 to the position where the own weight W acts, in other words, the central portion of the central shaft 20. Is a value obtained by integrating the winding diameter R of the shutter curtain 1 from.

  Further, in FIG. 8, a change in torque around the central axis 20 of the winding body 4 that attempts to close and move the shutter curtain 1 downward is indicated by a line C. This torque is derived from the self-weight torque around the central axis 20 due to the self-weight W of the portion of the shutter curtain 1 that is fed from the winding body 4, and when the shutter curtain 1 attempts to close and move downward, the guide rail 2 and the shutter curtain 1 is a value obtained by subtracting the resistance torque around the central axis 20 due to the upward resistance force generated based on friction with 1 or the like.

  When the magnitude of the own weight torque due to the own weight W and the magnitude of the resistance torque caused by the upward resistance force generated based on the own weight W are the same, the winding body 4 that attempts to close and move the shutter curtain 1 downward. The torque around the central axis 20 is zero. When the weight torque and the resistance torque are the same in the entire opening / closing movement area H of the shutter curtain 1, the line C is within the range of the opening / closing movement area H of the shutter curtain 1 in FIG. This is consistent with the horizontal axis.

  As described above, the torque indicated by the line B and the torque indicated by the line C include the own weight W of the portion of the shutter curtain 1 fed from the winding body 4 and the central portion of the central shaft 20. And the horizontal distance R to the position where the own weight W is acting, and both the own weight W and the horizontal distance R are the amount by which the shutter curtain 1 is fed out from the winding body 4 (winding up). The number of rotations of the body 4). For this reason, the torque around the central axis 20 necessary to open and move the shutter curtain 1 upward is also the torque around the central axis 20 that attempts to close and move the shutter curtain 1 downward (line C is the horizontal axis in FIG. 8). 8 except for the case where the axis coincides with the axis), as indicated by lines B and C in FIG. In addition, when the thickness of the shutter curtain is large and / or the mass of the shutter curtain is large, since the amount of change in the horizontal distance R and the own weight W when the winding body 4 makes one rotation is large, this curvilinear change is Become prominent.

  In addition, the winding diameter R of the shutter curtain 1 does not actually change smoothly with respect to the number of rotations of the winding body 4 due to the thickness of the slat 1B constituting the shutter curtain 1 and the like. The actual lines B and C do not change smoothly as shown in FIG. 8, but change as shown in lines B and C in FIG.

In the present embodiment, L _{1 is} an effective length of the entire length of the mainspring spring 26 that is wound when the shutter curtain 1 is fully opened, and the mainspring 26 is not in contact with each other. number of times N _1, the center axis T ₁ the weight torque around the winding body 4 due to the weight of the shutter curtain 1 when fully _opened, the shutter curtain 1 Toko when the shutter curtain 1 at full open attempts to move closed downward an upward resisting torque around the center axis of Makitokarada 4 based on the frictional force and the like generated between the guide rail 2 to guide the movement of the shutter curtain 1 'when a _1, T 1 _-T' T ₁ ≦ The configuration is such that the relationship of πEbh ³ N ₁ / 6L ₁ is established. For this reason, the shutter curtain 1 that has reached the fully open position maintains the fully open state in which the shutters 1 that are arranged at the fully open position are in contact with the torque T generated by the mainspring spring 26.

Further, in the present embodiment, the effective length that is not in contact with the inside or outside of the entire length of the mainspring spring 26 when the shutter curtain 1 is fully closed is L ₂ , and the effective length L ₂ is The number of turns of the mainspring spring 26 is N ₂ , the self-weight torque around the central axis of the winding body 4 due to the weight of the shutter curtain 1 when fully closed is T ₂ , and the shutter curtain 1 when fully closed is about to open and move upward. Taki the downward resisting torque around the center axis of Makitokarada 4 based on the frictional force and the like generated between the shutter curtain 1 and the guide rail 2 to guide the movement of the shutter curtain 1 and T _'2 when, PaiEbh ³ N ₂ / 6L ₂ ≦ T ₂ + T ′ ₂ is established. Therefore, the shutter curtain 1 that has reached the fully closed position is maintained in the fully closed state without opening and moving from the fully closed state by the torque T of the mainspring spring 26.

Furthermore, in the present embodiment, the effective length that is not in contact with the inside or outside of the entire length of the mainspring spring 26 wound at the middle position where the shutter curtain 1 is in the position before reaching the fully open position is expressed as L. ₃ , the number of turns of the mainspring spring for this effective length L ₃ is N ₃ , the self-weight torque around the central axis of the winding body 4 due to the self-weight of the shutter curtain 1 at the midway position is T ₃ , and the shutter curtain at the midway position Downward resistance torque around the central axis of the winding body 4 based on the frictional force and the like generated between the shutter curtain 1 and the guide rail 2 that guides the movement of the shutter curtain 1 when 1 is going to open and move upward 'when a _{3, T} 3 + T' to T ^₃ <πEbh ₃ relationship N ₃ / 6L ₃ is satisfied, and a fully open position this relationship from the middle position It is adapted to hold a range of in.

  As a result, after the shutter curtain 1 is manually opened and moved from the fully closed position to the intermediate position, the shutter curtain 1 is naturally moved to the fully opened position by the torque T of the mainspring spring 26.

  The intermediate position may be a substantially fully open position close to the fully open position.

  In addition, when the shutter curtain 1 reaches the fully open position, even if an unexpected downward external force is applied to the shutter curtain 1, the shutter curtain 1 is prevented from closing and moving downward. A manual brake device that prevents the winding body 4 from rotating is provided, and an engagement member that is detachably engaged with a shutter curtain constituent member such as a seat plate is provided at an arrangement location such as the lintel. A manual stop device may be provided, or when the shutter curtain 1 is closed and moved downward, the brake device and the stop device may be released manually.

FIG. 8 shows lines A ₁ and A ₂ , and these lines A ₁ and A ₂ correspond to the theoretical torque T of the spring spring 26 indicated by the line A, and the spring spring 26. shows the real material and entrainment torque of spiral spring 26 which hysteresis is considered to occur on the basis of the state or the like, the line a ₁ is fully closed while spiral spring 26 is wound up shutter curtain 1 from the fully open position a case to reach the position, the line a ₂ are the opposite case. In this embodiment, even if the torque T of the mainspring spring 26 is a value affected by such hysteresis, the relationship of T ₁ −T ′ ₁ ≦ πEbh ³ N ₁ / 6L ₁ and πEbh ³ The relationship of N ₂ / 6L ₂ ≦ T ₂ + T ′ _{2 and} the relationship of T ₃ + T ′ ₃ <πEbh ³ N ₃ / 6L ₃ are established.

  In other words, in this embodiment, the elastic coefficient E, the thickness dimension h, and the width dimension b of the mainspring spring 26 are selected so that these relationships are established, and the fully open position of the shutter curtain 1 with respect to the number of windings of the mainspring spring 26. The fully closed position is set.

Then, as shown in Figure 8, a torque indicated by the line B than the torque indicated by the line A _1, A ₂ is not increased, are shown by the line A _1, A ₂ By providing a region in which the torque indicated by the line C is smaller than the torque, in this region, the shutter curtain 1 is brought to its position in a state where the opening / closing moving force is not applied to the shutter curtain 1. The shutter curtain 1 can be stopped and moved to open and move the shutter curtain 1 with an operating force corresponding to the difference between the torque indicated by the lines A ₁ and A ₂ and the torque indicated by the line B. becomes better if caused to act on the 1, torque to move to close the shutter curtain 1 is indicated by the torque and the line C indicated by the line a _1, a ₂ It becomes better if caused to act an operating force corresponding to the difference in shutter curtain 1.

  The operating force is due to manual operation, but the present embodiment can also be applied when the operating force is driven by a driving device such as an electric motor. Thus, the operating force is applied to an electric motor or the like. In the case of using a driving device, the shutter curtain can be opened and closed by a small driving force of the driving device.

According to the above embodiment, since the relationship of T ₁ −T ′ ₁ ≦ πEbh ³ N ₁ / 6L ₁ is established, the shutter curtain 1 that has reached the fully open position is placed in the lintel that is disposed at the fully open position. It can be maintained in the fully open state in which the mainspring spring 26 is brought into contact with the torque T.

Further, since the relationship of πEbh ³ N ₂ / 6L ₂ ≦ T ₂ + T ′ ₂ is also established, the shutter curtain 1 that has reached the fully closed position is maintained in the fully closed state without being moved from the fully closed state. be able to.

Further, since the relationship of T ₃ + T ′ ₃ <πEbh ³ N ₃ / 6L ₃ is also established, after the shutter curtain 1 is manually opened and moved from the fully closed position to the intermediate position, the shutter curtain 1 is moved. The spring of the mainspring 26 can be opened and moved to the fully open position. In this way, the configuration in which the shutter curtain 1 naturally opens and moves from the midway position to the fully open position with the torque of the mainspring spring 26 has a long vertical opening / closing distance and is operated by hand or hand up to the fully open position. 1 is particularly effective for a shutter device in which the member does not reach, for example, a shutter device in which the opening / closing movement region H shown in FIG. 1 of the shutter curtain 1 is larger than the width dimension of the shutter curtain 1. The size of the opening / closing movement region H may be two to three times or more.

  By the way, in order to ensure that the torque T having a predetermined magnitude of the mainspring spring 26 is properly used in the opening / closing movement region H of FIG. 8, the mainspring spring 26 when the shutter curtain 1 is fully opened or fully closed is used. The tightening state must be capable of realizing the torque characteristic indicated by line A in FIG. 8, and an operation capable of realizing this must be performed on the mainspring spring 26. This operation is performed as follows.

  Before the core member 27 of each rotary body 22 is coupled to the central shaft 20 by the couplers 28 and 29 shown in FIG. 3, the winding formed by the rotary body 22 and the bar-shaped member 23 is formed. While the rotation of the body 4 is stopped by a restraining tool (not shown), the respective core members 27 are rotated with respect to the central axis 20 by the tool 40 shown in FIG. 3, thereby being stored in the internal space S of the cup-shaped member 24. Each of the mainspring springs 26 is tightened. The tool 40 is provided with a protrusion that engages with a notch 41 generated when the receiving piece 27B is formed by cutting down the axial end of the core member 27. When the tool 40 is rotated, The core member 27 rotates about the central axis 20 by the rotational force from the protrusion. By such a rotation operation, the respective mainspring springs 26 are wound, and a return spring force is generated in these mainspring springs 26. The operation of accumulating the pressure until the mainspring spring 26 generates a torque having the same magnitude as the torque around the central axis 20 of the winding body 4 due to the return spring force of all the mainspring springs 26 when the shutter curtain 1 is fully closed. Do.

  Thereafter, the core member 27 in each rotating body 22 is coupled to the central shaft 20 by the coupling members 28 and 29, and is formed in the hole 42 and the inner ring member 35B formed in the outer ring member 35A of the bearing 35. The bolt 43 is inserted into the hole 43 formed in the core member 27 and the hole 44 formed in the central shaft 20, and the nut is screwed into the end of the bolt penetrated to the opposite side. . As a result, the core member 27 and the rotating body 22 are fixed to the central shaft 20 by a coupling tool including these bolts and nuts.

  A plurality of holes 43 and 44 in the inner ring member 35B and the core member 27 are formed in the circumferential direction. For this reason, when the return spring force due to the winding of the mainspring spring 26 reaches a predetermined value, the mainspring spring 26 Even when the tightening operation of the winding member is finished, the core member 27 and the rotating body 22 are moved to the central axis by the above-described bolt and nut coupler while maintaining the return spring force or the return spring force close to the return spring force. 20 can be fixed. Also, a plurality of holes in the core member 27 for inserting the bolts of the coupler 29 are formed in the circumferential direction.

  Next, the shutter curtain 1 from which the seat plate 1A has been removed in advance is inserted while being suspended from above on the lintel formed on the lower surface 3A of the shutter case 3 shown in FIG. The both ends of the shutter curtain 1 protruding in the width direction are inserted into the left and right guide rails 2, the seat plate 1 </ b> A is attached, and the shutter curtain 1 is further lowered to the fully closed position. Then, the operation | work which couple | bonds the upper end part of the shutter curtain 1 with the annular flange part 25A of the wheel member 25 of each rotary body 22 is performed as mentioned above. Then, the nut is removed from the bolt inserted through the hole 42 of the outer ring member 35A of the bearing 35, the hole 43 of the inner ring member 35B, the hole 44 of the core member 27, and the hole of the central shaft 20, and the bolt is pulled out. Work is performed and the couplers 28 and 29 are left as they are.

  As a result, the return spring force accumulated in the mainspring spring 26 is in a releasable state, and the winding body 4 composed of the respective rotating bodies 22 and the bar-like member 23 is rotatable about the central axis 20. By applying a small push-up force to the curtain 1, the winding body 4 rotates to open and move the shutter curtain 1 while using the return spring force already accumulated in the mainspring spring 26 as a rotation biasing force. 1 reaches the fully open position.

  Thus, the tightening state of all the mainspring springs 26 when the shutter curtain 1 is fully opened, fully closed, or the like can realize the torque characteristics indicated by the line A in FIG.

  In the present embodiment described above, as described with reference to FIG. 3, in each rotating body 22 that is a member forming the winding body 4, the end surface portion 25 </ b> B of the wheel member 25 is in the diameter direction of the central shaft 20. Further, the body portion 24C of the cup-shaped member 24 is a cylindrical portion having a width in the axial direction of the central shaft 20, and each of the rotating bodies 22 has such a configuration. It has a shape and structure having a rising portion 25B and a cylindrical portion 24C. Then, the bent outer end portion 26B of the mainspring spring 26 is locked to the locked portion 24E formed in the cylindrical portion 24C as described with reference to FIG. The bending direction of the end portion 26 </ b> B and the bending direction of the inner end portion 26 </ b> A of the mainspring spring 26 locked to the core member 27 by the slit 27 </ b> A are opposite to each other in the circumferential direction of the winding body 4. . Thereby, when the winding body 4 rotates around the central axis 20 in the direction in which the shutter curtain 1 wound around the annular flange portion 25A of the wheel member 25 is extended, the mainspring spring 26 and the inner end portion 26A are connected. The outer end portion 26B can be tightened without being disengaged from the slit 27A and the locked portion 24E.

  By the way, when two types of rotating bodies in which the position of the cylindrical portion 24C with respect to the rising portion 25B is opposite to each other in the axial direction of the central shaft 20 are provided in each rotating body 22, these rotations are performed. As one of the bodies, the rotating body 22 shown in FIG. 3 can be used as it is, but as another rotating body, the rotating body 22 shown in FIG. The direction cannot be reversed and used as it is. This is because, for the rotating body 22 in which the axial direction of the central shaft 20 is reversed, the direction of the locked portion 24E for locking the outer end portion 26B of the mainspring spring 26 is opposite to the direction of FIG. This is because the outer end portion 26B cannot be locked to the locked portion 24E, and the mainspring spring 26 cannot be tightened.

  For this reason, in this embodiment, as shown in FIG. 2, the rotating bodies 22 are arranged such that the cylindrical portion 24C is on the same side in the axial direction of the central shaft 20 with respect to the rising portion 25B. ing. Thereby, the shape and structure of all the rotary bodies 22 can be made the same, and by making these rotary bodies 22 common, the reduction of the manufacturing cost of the whole winding body 4 is reduced, and these rotary bodies 22 are made into the center axis | shaft 20. Ease of work at the time of arrangement can be achieved.

  Further, according to the present embodiment, the mainspring springs 26 provided in the respective rotating bodies 22 may be the mainspring springs having the same winding direction. Therefore, all the mainspring springs 26 can be made common.

  Further, in this embodiment, the inner end portion 26A of the mainspring spring 26 is not locked to the central shaft 20, and this inner end portion 26A is related to the core member 27 prepared for each rotating body 22. Since the mainspring spring 26 is stopped, a mainspring spring unit including the rotating body 22, the mainspring spring 26, and the winding core member 27 can be formed with respect to one mainspring spring 26. The mainsprings 26 are arranged on the central shaft 20 simply by being arranged, and the mainspring spring unit 21 is connected by the bar-shaped member 23 described above to form the rotary cage body 21 described above. These operations can be easily performed.

  Furthermore, in this embodiment, each rotary body 22 is not formed by one member, but is a wheel member 25 that is a first member that includes a rising portion 25B, and a second member that includes a cylindrical portion 24C. Since it is formed by joining the cup-shaped member 24, the rotating body 22 having the locked portion 24E can be easily manufactured by press working or the like.

  In this embodiment, a mainspring spring 26 is used as a return spring, and the mainspring spring 26 spirals from one end portion to the other end portion at the same position or substantially the same position in the axial direction of the central shaft 20. Since the spiral spring is wound, the width of the central shaft 20 in the axial direction is small, so that the entire axial length of the winding body 4 can be shortened. Further, since the mainspring spring 26 is formed by spirally winding a plate material having a small thickness, the mainspring spring 26 can be housed and disposed in the space S having a small diametrical dimension. The overall diameter of the body 4 can also be reduced.

  The shutter device described above is a manual type that manually opens and closes the shutter curtain 1. Next, an embodiment of an automatic shutter device that automatically opens and closes the shutter curtain 1 will be described. explain.

  Of the left and right brackets 5 that support both ends of the central shaft 20 in the winding body 4 of the embodiment shown in FIG. 9, the side on which the cup-shaped member 24 on which the cylindrical portion 24C of the rotating body 22 is formed faces. The bracket 5 is provided with an opening / closing device 50 comprising a combination of an electric motor and a brake, and a pinion gear 51 is attached to a drive shaft 50A of the opening / closing device 50 which is a driving device. A ring gear 52 is attached to the outer peripheral surface of the cup-shaped member 24 of the rotating body 22 closest to the switch 50 among the plurality of rotating bodies 22, that is, the outer peripheral surface of the cylindrical portion 24C. The pinion gear 51 is meshed with the teeth formed on the outer peripheral portion. For this reason, the rotational force of forward / reverse rotation is applied from the opening / closing machine 50 to the winding body 4 via the pinion gear 51 and the ring gear 52.

  According to this embodiment, the length of the bar-shaped member 23 that connects the plurality of rotating bodies 22 arranged in the axial direction of the central shaft 20 is the rotating body 22 arranged at both ends of the central shaft 20 in the axial direction. For this reason, the bar-shaped member 23 has a length that does not extend to the switch 50 side beyond the rotating body 22 closest to the switch 50, and the ring gear 52 is attached to the bar-shaped member 23. Even if it cannot be attached, the ring gear 52 can be attached to the winding body 4 by using the cup-shaped member 24 of the rotating body 22 closest to the opening / closing machine 50.

  FIG. 10 shows an automatic shutter device according to another embodiment, and FIG. 11 is a sectional view taken along line S11-S11 in FIG.

  As shown in FIG. 11, the upper bracket member 60 and the lower bracket member 61 sandwich the central shaft 20 between the two rotating bodies 22 arranged adjacent to each other in the axial direction of the central shaft 20. As shown in FIG. 10, the upper bracket member 60 is coupled to each other by a coupling tool 62 such as a screw and is prevented from rotating with respect to the central axis 20 by a rotation preventing member 63 such as a long-axis screw. An opening / closing device 70 comprising a combination of an electric motor and a brake is attached, and a pinion gear 71 is attached to a drive shaft 70A of the opening / closing device 70 which is a drive device. A ring gear 72 is attached to the bar-like member 23 that connects the respective rotating bodies 22, and this attachment is performed by fitting the bar-like member 23 into a recess 72 </ b> A formed in the ring gear 72 as shown in FIG. 11. The pinion gear 71 meshes with the teeth formed on the inner peripheral portion of the ring gear 72. For this reason, also in this embodiment, the rotational force of forward and reverse rotation is applied from the opening / closing machine 70 to the winding body 4 via the pinion gear 71 and the ring gear 72.

  According to this embodiment, the return spring provided in each rotating body 22 is a mainspring spring 26 having a smaller width dimension in the axial direction of the central shaft 20 than a torsion coil spring or the like. Even if the opening / closing device 70 is arranged between the two rotating bodies 22 arranged adjacent to each other, the overall axial length of the winding body 4 can be reduced. Thereby, the winding body 4 can be set to an arbitrary size, and the size of the winding body 4 can be reduced as necessary.

  In the present invention, the return spring force accumulated during one rotation of the winding body for winding and unwinding is wound on the winding body that winds and opens the opening and closing body to move the opening and closing body up and down. This can be used when a mainspring spring used for the other rotation of the winding body is provided.

It is a front view showing the whole shutter device which is an opening and closing device concerning one embodiment of the present invention. It is a front view which shows the winding body which a shutter curtain is wound up and is drawn out. It is front sectional drawing which shows the rotary body which is a structural member of a winding body. FIG. 4 is a cross-sectional view taken along line S4-S4 of FIG. FIG. 5 is a cross-sectional view taken along line S5-S5 of FIG. It is the figure which looked at the initial tightening state of the mainspring spring which is a return spring from the same direction as FIG. It is the figure which looked at the final tightening state of the mainspring spring from the same direction as FIG. It is a graph which shows the torque around the central axis by the return spring force of the mainspring spring, and the torque around the central axis regarding the opening and closing movement of the shutter curtain. It is a plane sectional view showing a winding structure of an automatic shutter device that automatically opens and closes a shutter curtain. It is a plane sectional view showing a winding body structure of an automatic shutter device according to another embodiment. It is the S11-S11 sectional view taken on the line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shutter curtain which is an opening / closing body 2 Guide rail which is a guide member 4 Winding body 20 Center axis 22 Rotating body 24 Cup-shaped member which is 2nd member 25 Wheel member which is 1st member 24C , The body portion 25B of the cup-shaped member, and the rising portion of the rotating body, the end surface portion of the wheel member 26, the mainspring spring 26A, the inner end portion of the mainspring spring 26B, the outer end portions 26C, 26F of the mainspring spring, and the densely wound portion 26D of the mainspring spring 26E Coarse winding portion of mainspring spring 27 Core member 50, 70 Opening / closing machine as drive unit

Claims (10)

There is a return spring force when the winding body is wound up and rolled out to move the opening and closing body up and down and when the winding body is rotated to one side of the winding body for closing and closing the opening and closing body. A return spring that is accumulated and includes a return spring in which the accumulated return spring force is used to rotate the winding body to the other side for upward opening movement of the opening / closing body. In
The return spring is a mainspring spring, and the elastic coefficient of the mainspring spring is E, the width dimension is b, the thickness dimension is h, and the total length of the winding of the mainspring spring when the opening / closing body is fully opened is Of these, the effective length that is not in contact with the inside and the outside is L ₁ , the number of windings of the mainspring spring for this effective length L ₁ is N ₁ , and the center of the winding body by the dead weight of the opening / closing body when fully opened The self-weight torque around the axis is T ₁ , based on the frictional force generated between the opening / closing body and a guide member that guides the movement of the opening / closing body when the opening / closing body is about to move downward and close when fully opened. when the upward resisting torque around the center axis of the winding body was T _'1,
T ₁ −T ′ ₁ ≦ πEbh ³ N ₁ / 6L ₁
An opening / closing device characterized in that the relationship is established. 2. The opening / closing apparatus according to claim 1, wherein an effective length that is not in contact with the inside or outside of the entire length of the mainspring spring wound when the opening / closing body is fully closed is L ₂ , and this effective length L the number of turns of the spiral spring for ₂ N _2, wherein the weight torque around the center axis of the winding body by its own weight of the closing body in the fully closed position T _2, wherein the said opening and closing member when fully closed is above the winding down of the resistance torque of the central axis of up body based on frictional force or the like generated between the movable member when attempting to move a guide member for guiding the movement of the opening and closing member opening and a T _'2 When
πEbh ³ N ₂ / 6L ₂ ≦ T ₂ + T ′ ₂
An opening / closing device characterized in that the relationship is established. The opening / closing apparatus according to claim 1 or 2, wherein the opening / closing body is in contact with the inside / outside of the entire length of the mainspring spring wound at a midway position that is a position before the opening / closing body reaches the fully open position. No effective length is L ₃ , the number of windings of the mainspring spring is N ₃ for this effective length of L ₃ , and the self-weight torque around the central axis of the winding body due to the self-weight of the opening / closing body at the intermediate position is T _3. A central axis of the winding body based on a frictional force or the like generated between the opening / closing body and a guide member that guides the movement of the opening / closing body when the opening / closing body at the midway position is about to open upward and move when around the downward resisting torque it was T _'3,
A switchgear characterized in that a relationship of T ₃ + T ′ ₃ <πEbh ³ N ₃ / 6L ₃ is established, and this relationship is established in a range from the midway position to the fully open position.   4. The switchgear according to claim 1, wherein the number of the mainspring springs is a plurality arranged in the axial direction of the winding body, and the elastic modulus E and the thickness of the mainspring springs. An opening and closing device characterized in that the dimension h is the same, and the total width dimension of these mainspring springs is b. 5. The opening / closing apparatus according to claim 4, wherein the winding body includes at least a central axis that does not rotate during the winding and unwinding of the opening / closing body and a central axis that winds up and closes the opening / closing body. A plurality of rotating bodies arranged in the axial direction on the outer periphery of the central axis and being separated from each other in the axial direction.
At least two of the rotating bodies are provided with the mainspring springs, and one end of each of the mainspring springs is bent to one side in the circumferential direction of the winding body to be on the central axis side. And the other end of the mainspring spring is bent to the other side in the circumferential direction of the winding body and locked to the rotating body side,
The at least two rotating bodies provided with the mainspring spring include a rising portion that rises in the diameter direction of the central axis, and a cylindrical portion that has a width in the axial direction of the central axis. And the other end of the mainspring spring is locked to the cylindrical portion, and the cylindrical portions of the at least two rotating bodies are on the same side in the axial direction of the central axis with respect to the rising portion. A switchgear characterized by being arranged.   6. The opening / closing apparatus according to claim 5, wherein the number of the rotating bodies provided with the mainspring spring is three or more, and the cylindrical portion of the entire rotating body is in relation to the rising portion. An opening / closing device arranged on the same side of the central axis in the axial direction.   The switchgear according to claim 5 or 6, wherein a core member is fixed to the central shaft for each of the at least two rotating bodies, and the one end of the mainspring spring is locked to the core member. A switchgear characterized by that.   8. The opening / closing apparatus according to claim 5, wherein the at least two rotating bodies include a first member that forms the rising portion and a second member that forms the cylindrical portion. An opening / closing device in which the rotating body is formed by coupling the first member and the second member.   The switchgear according to any one of claims 1 to 8, further comprising a drive device for rotating the winding body.   The opening / closing device according to any one of claims 4 to 9, further comprising a driving device for rotating the winding body, wherein the at least two rotating bodies are adjacent to each other in the axial direction of the central axis. The opening / closing device is characterized in that the drive device is disposed between the rotating bodies.

Images