JP2006257863A - Winding member structure with return spring of opening and closing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a winding member structure with a return spring of an opening and closing device enabling a reduction in the size of the overall opening and closing device with the return spring. <P>SOLUTION: A winding body 4 taking in and letting off a shutter curtain 1 to open/close and move the shutter curtain 1 as an opening and closing body comprises a plurality of rotating bodies 22 axially disposed on a center shaft 20 and having power springs 26 as the return springs. An opening and closing machine 50 as a drive device for imparting a normal and reverse rotating forces to the winding body 4 is installed between two rotating bodies among the plurality of rotating bodies on the center shaft 20. The normal and reverse rotating forces are imparted from the opening and closing machine 50 to the winding body 4 through a pinion gear 55 and a ring gear 56. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention is a winding body that can be rotated forward and backward to wind the opening / closing body in order to open and close the opening / closing body, and the return spring force accumulated during one rotation of the forward / reverse rotation is the other. Various types of shutters including a disaster prevention shutter device having an opening / closing body serving as a shutter curtain and an opening shutter device. It can be used for a winder structure such as a device, an overhead door device, a roll blind device, an awning device, and a smoke proof curtain device.

  In Patent Document 1 below, the shutter curtain, which is an opening / closing body, is wound up to open and close, and the winding body that is wound out is forwarded to the winding body for forward and reverse rotation. A return spring force is accumulated during one rotation of the winding, and the accumulated return spring force is a return spring that is used as an auxiliary force for the other rotation of the winding body; A winding body structure with a return spring of a shutter device provided with an opening / closing device which is a driving device for applying at least one rotational force of the forward and reverse rotations is shown.

In such a winding body structure, the winding body is at least rotatable about the central axis for winding and unwinding the shutter curtain, and a central axis that does not rotate during winding and unwinding of the shutter curtain, A winding body main body disposed on the outer periphery of the central shaft, and one end of the return coil spring is connected to the central shaft and the other end is connected to the winding body main body. The winder body is rotatably supported by a pair of left and right brackets, and an open / close machine composed of a combination of a motor and a brake is mounted on one of the left and right brackets. It is mounted on a separate shaft from the main body, and is connected to the winder body through power transmission means such as a chain and sprocket.
Japanese Patent Laying-Open No. 2005-60967 (FIGS. 3 to 5)

  However, when the opening / closing machine is arranged on a separate axis from the winder body, the entire shutter device becomes large. For this reason, the device of the winding body structure with a return spring which can miniaturize the whole shutter apparatus provided with the return spring is calculated | required.

  An object of the present invention is to provide a winder structure with a return spring of an opening / closing device that can reduce the size of the entire opening / closing device provided with the return spring.

  The winding structure with a return spring of the switchgear according to the present invention includes a winding body that winds and unwinds the opening / closing body to open and close the opening / closing body, and the winding body for winding and unwinding. A return spring force is accumulated during one of the forward and reverse rotations, and the accumulated return spring force is used as an auxiliary force for the other rotation of the winder, and the winder And a drive device for applying a rotational force of at least one of the forward and reverse rotations to the winding structure with a return spring of the opening / closing device, wherein the winding body is at least the winding A center axis that does not rotate during unwinding, and a winder body that can be rotated forward and backward around the center axis for winding and unwinding the opening and closing body, and disposed on the outer periphery of the center shaft. The return spring is configured as A spiral spring that is spirally wound from one end to the other end at the same or substantially the same axial position of the central axis, and one end of the spiral spring is attached to the central axis The other end is attached to the winder body, and the drive device is attached to the central shaft.

  In the winding body structure with a return spring of the opening / closing device, the winding body is configured to have a central axis and a winding body main body that is arranged on the outer periphery of the central axis and is rotatable forward and backward. The return spring is a spiral spring that is spirally wound from one end to the other end at the same or substantially the same axial position of the central axis, and one end of the spiral spring is While being attached to the central shaft, the other end is attached to the winder body, and the drive device is attached to the central shaft. That is, in the present invention, the drive device is arranged coaxially with the winder body.

  For this reason, according to this invention, compared with the winding body structure with the return spring of the conventional opening / closing apparatus with which the drive device is arrange | positioned separately from the winding body main body, size reduction of the whole switching apparatus is achieved. Will be able to.

  The above-mentioned “at least the central axis that does not rotate during winding and unwinding” may be an axis that does not always rotate, or, for example, a predetermined return spring force is accumulated in the return spring. This means that the center axis may be rotated when performing a tightening operation for the purpose.

  In the present invention, the return spring is a spiral spring that is spirally wound from one end to the other end at the same or substantially the same position in the axial direction of the central axis. For this reason, the width dimension in the axial direction of the spiral spring can be reduced, whereby the axial length dimension of the entire winding body on which the return spring is disposed can be shortened.

  Furthermore, since the spiral spring is a spring having a small width dimension in the axial direction, the width dimension of the opening / closing body is made smaller than the opening / closing movement length of the opening / closing body, in other words, the opening / closing movement length of the opening / closing body is set to the width of the opening / closing body. It becomes possible to make it larger than the dimension.

  When the return spring is a spiral spring, the spiral spring may be a spring formed by winding a plate material into a spiral shape, that is, a mainspring spring, and a wire having a circular cross section, an elliptical cross section, or a rectangular cross section. Etc. may be spirally wound. Further, when the return spring is formed of any of these, the number of windings, the total length, and the like are arbitrary.

  If the spiral spring is a mainspring spring formed by winding a plate material in a spiral shape, the thickness of the plate material is small, so the diameter of the entire return spring can be reduced. ) Can be reduced.

  In the present invention, the size, shape, etc. of the drive device for applying at least one of the forward and reverse rotation forces to the winding body is arbitrary, but the maximum dimension in the diameter direction of the central axis of this drive device Is preferably equal to or smaller than the diameter of the wound body.

  According to this, the size of the central axis of the opening / closing device in the diameter direction can be further reduced.

  In the present invention, it is more preferable that the maximum dimension in the diameter direction of the central axis of the drive device is the same as or smaller than the diameter dimension of the spiral spring.

  When the diameter of the winding body is reduced, the diameter of the spiral spring is related to the stroke length of the opening / closing body, so the diameter cannot be reduced (in other words, the length of the spiral spring cannot be shortened). This is because if the diameter of the winding body is reduced, the number of rotations of the winding body per the same stroke of the opening / closing body increases, so a longer spiral spring is required, and the diameter dimension of the spiral spring must be rather increased. Because. For this reason, the minimum size (dimension) of the diameter (inner diameter) of the winding body is the same as or larger than the diameter dimension of the spiral spring.

  Therefore, if the maximum dimension in the diameter direction of the central axis of the drive unit is the same as or smaller than the diameter dimension of the spiral spring, the diameter of the winding body should be reduced to the same minimum size as that without the drive unit. Is possible.

  In the present invention, the position where the drive device is attached to the central axis is arbitrary, and may be, for example, a position where the winder body is disposed on the outer periphery of the central axis in the central axis. It may be a position separated in the direction (for example, an axial end portion of the central axis). The drive device may be provided so as to surround the entire circumference of the central axis, or may be provided so as to be biased toward a part of the circumferential direction of the entire circumference of the central axis.

  In the present invention, the shape, structure and the like of the winding body are arbitrary. As a first example of the winding body, the winding body is composed of one cylindrical rotating body arranged on the outer periphery of the central axis. A spiral spring is disposed between the inner peripheral surface of the rotating body and the outer peripheral surface of the central axis, and the other end of the spiral spring is attached to the inner peripheral surface of the rotating body. In the first example, the number of spiral springs to be arranged may be one or plural.

  As a second example of the winding body, a plurality of rotating bodies arranged in the axial direction on the outer periphery of the central axis, and a length extending in the axial direction of the central axis, And a connecting member to be connected. In the second example, the other end of the spiral spring may be attached to at least one of the plurality of rotating bodies. And in this 2nd example, it is preferable that a drive device is arrange | positioned in the diameter direction inside of a central axis rather than a connection member.

  In the second example of the winder body, the position where the driving device is disposed is arbitrary, but it is more preferably disposed between two of the plurality of rotating bodies. By disposing the driving device between the two rotating bodies, the sleeve dimension of the winding body (the dimension of the portion where the opening / closing body is not wound and not fed out) can be further shortened. Further, the drive device can be arranged by effectively using the space between the two rotating bodies.

  In the case where the driving device is disposed between two of the plurality of rotating bodies, the interval between the rotating bodies is arbitrary as long as the driving device can be disposed. It may be the same as the size of the driving device or may be larger than this size.

  In the second example of the winding body, the at least one rotating body to which the other end of the spiral spring is attached includes a rising portion rising in the diameter direction of the central axis, and an axial direction of the central axis. The other end of the spiral spring may be attached to the cylindrical portion. And when arrange | positioning a drive device in one edge part of the axial direction both ends of a center axis | shaft, the said at least 1 rotary body to which the other end of a spiral spring is attached is centered on the said drive device. More preferably, it is arranged adjacent to the inside in the axial direction of the shaft, and the cylindrical portion of the rotating body is arranged on the side opposite to the driving device side with respect to the rising portion.

  According to this, as compared with the case where the cylindrical portion of the at least one rotating body is disposed on the same side as the driving device side with respect to the rising portion, the axial length of the central axis of the cylindrical portion is reduced. Since it can shorten by the width | variety to the axial direction of a center axis | shaft, the sleeve dimension of a winding body can be shortened more.

  In the case where a plurality of rotating bodies are arranged on the outer periphery of the central axis so as to be separated from each other in the axial direction, the interval between these rotating bodies is arbitrary, and when the number of rotating bodies is 3 or more, The intervals may be the same or different.

  Further, the number of spiral springs provided in the at least one rotating body may be one or plural. In order to increase the number of spiral springs provided on the at least one rotating body, the size of the rotating body should be such that the maximum number of spiral springs can be arranged, and one end of each of the spiral springs and the other. A portion to which the end can be attached is provided on the central axis side and the cylindrical portion of the rotating body, so that one end and the other end of any number of spiral springs selected from the maximum number can be attached to these portions. You can do it.

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

  According to the latter, one end of the spiral spring is locked to the core member prepared for each rotor provided with the spiral spring, so that the rotor, the spiral spring, and the core are connected to one spiral spring. Thus, it is possible to form a single return spring unit that includes the members, and therefore, it is possible to obtain an effect that the arrangement work of the spiral spring on the central axis can be facilitated.

  In the present invention described above, the configuration of the drive device is arbitrary, and as an example, a drive unit for applying a rotational force of at least one of forward and reverse rotations to the winding body, and drive control of the drive unit. A control unit that executes the control unit. The control unit is separated from the drive unit, and the control unit and the drive unit are spaced apart in the axial direction of the central axis. Can be mentioned. According to this, since the control unit is separated from the drive unit, the dimension in the diameter direction of the central axis of the drive device can be shortened accordingly.

  In an example of the driving device, the driving unit and the control unit may be connected by a lead wire, or may not be connected by a lead wire.

  When the drive unit and the control unit are connected by a lead wire, a cutout portion through which the lead wire is inserted in the axial direction of the central axis may be formed on the central axis. According to this, since the lead wire can be inserted and stored in the notch portion of the central axis, it is possible to prevent the lead wire from interfering inside the winding body.

  Further, when the drive unit and the control unit are connected by a lead wire, the central axis may have a hollow portion, and the lead wire may be inserted and stored in the hollow portion. This also prevents the lead wire from interfering with the inside of the winding body.

  When the drive unit and the control unit are not connected by a lead wire, the control unit includes a transmission unit that transmits a radio signal for controlling the drive unit, and the drive unit includes the radio signal. May be provided with a receiving unit for receiving.

  The configuration of the drive unit is arbitrary, and examples include an electric motor and a brake. The drive unit further includes a speed reducer and a limit switch. Etc. may be included.

  In the present invention described above, when the opening / closing movement direction of the opening / closing body is a direction having a vertical component in which the upward movement is an open movement, the spiral spring is a torque generated by the accumulated return spring force. Is a spring having a region that increases at an increasing rate that gradually decreases, and in this region, there is a time when the opening / closing body is fully opened before the opening of the opening / closing body by the one rotation of the winding body starts, It is preferable that the torque increases as the opening / closing body is extended from when the opening / closing body is fully opened.

  When a spiral spring is provided in an opening / closing device that winds the opening / closing body by forward / reverse rotation of the winding body and moves it open / close up / down, the return spring force accumulated by the spiral spring opens the opening / closing body upward. It is used for this opening movement when moving, and it is also used as a restraining force to prevent the opening / closing body from closing and moving suddenly due to its own weight when the opening / closing body is closed downward. It is preferable that the spring characteristic of the spring is compatible with the weight torque of the opening / closing body around the central axis of the winding body.

  The self-weight torque is a value obtained by integrating the self-weight of the part of the opening / closing body fed out from the winding body and the winding diameter of the opening / closing body from the central axis of the winding body. The opening diameter of the opening / closing body changes from the winding body as it advances, but the winding diameter when the opening / closing body is fully open is large. The self-weight torque changes greatly. For this reason, it is desirable that the spiral spring has a spring characteristic adapted to such a change in its own weight torque.

  As described above, since the winding diameter of the opening / closing body from the winding body central axis when the opening / closing body is fully open is large, the winding body has a predetermined angle such as one rotation to feed the opening / closing body downward. When the rotation is performed, the length of the opening / closing body that is drawn downward by the rotation of the predetermined angle is longer than the rotation of the winding body that starts when the opening / closing body is not fully opened. When the opening / closing body is drawn out from the fully open position by the rotation of the winding body at the predetermined angle, the winding diameter of the opening / closing body decreases. The length contributes to an increase in the own weight torque of the opening / closing body, and the increase rate of the own weight torque at this time is large.

  For this reason, as described above, the spiral spring is a spring having a region in which the torque due to the accumulated return spring force gradually increases at an increasing rate, and within this region, due to one rotation of the winding body There is a time when the opening / closing body is fully opened before the opening / closing of the opening / closing body, and the torque increases with the extension of the opening / closing body since the opening / closing body is fully opened. Matching with the change in the weight torque of the opening / closing body when the body is drawn out from the fully open position, it is possible to smoothly open and close the opening / closing body by the relationship with the return spring force of the spiral spring. .

  In the above description, when the opening / closing body is fully opened, it may coincide with or substantially coincide with the starting point of the region where the torque of the spiral spring gradually increases.

  Further, as described above, the use of the accumulated return spring force of the spiral spring for the rotation of the winding body for the upward movement of the opening / closing body to the other side is only this return spring force. In this case, the winding body may be rotated to the other side. For example, the return spring force may be used to assist the manual operation force or the rotational force applied to the winding body by the driving device.

  In the present invention, if the spring has a region where the torque due to the return spring force accumulated as described above increases at an increasing rate that gradually decreases, the torque of the subsequent return spring may be arbitrarily changed. The torque increase rate may be a constant value or a substantially constant value, or the subsequent torque increase rate may be increased, or the subsequent torque increase rate may continue to decrease gradually. Good.

  When the opening / closing body is fully extended from the fully opened position, the winding diameter decreases, so that the retractable length of the opening / closing body when the winding body rotates at a predetermined angle such as one rotation to extend the opening / closing body downward. Gradually becomes shorter. For this reason, when the opening / closing body is fully extended, the rate of increase in the weight of the opening / closing body becomes a constant value or a value close to a constant value.

  When the opening / closing body reaches the fully closed position when the weight of the opening / closing body is a constant value or a value close to a certain value, the spiral spring is moved out of the opening / closing body. A spring having a region in which the rate of increase of the torque due to the return spring force becomes a constant value or a substantially constant value as the valve travels, and in this region, there is a time when the opening / closing body is fully closed. It is preferable to set.

  According to this, the spring characteristic of the return spring can be matched with the change in the weight torque of the opening / closing body until the opening / closing body is fully extended and the opening / closing body is fully closed.

  In addition, if the spiral spring according to the present invention has a region in which the rate of increase of the torque due to the return spring force becomes a constant value or a substantially constant value as the opening / closing body is advanced, the torque characteristics thereafter Can be any spring, for example, a spring that ends in this region, or a spring that subsequently increases or decreases in torque increase rate, for example. As for the latter, with regard to the spring in which the rate of increase in torque thereafter changes, when the opening / closing body reaches the fully closed position, a region where the rate of increase in torque is a constant value or a substantially constant value, It may be a boundary with a region where the increase rate is changing.

  The torque characteristics of the spiral spring described above may be based on the torque characteristics of a single spiral spring, or may be a combination of torque characteristics of a plurality of spiral springs.

  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.

  Furthermore, the present invention can be applied to any opening / closing device. That is, the present invention can be applied to an arbitrary opening / closing device such as a shutter device in which the opening / closing body is a shutter curtain, an overhead door device, a roll blind device, an awning device, a smoke-proof banner device, etc. An opening shutter device that opens and closes an opening such as an entrance / exit with a shutter curtain may be used, 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 storage device It may be a shutter device, or may be a loading platform of 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, it is possible to reduce the size of the entire switchgear including the return spring.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 shows an overall front view of a shutter device that is an opening / closing device adopting a winding structure with a return spring according to the present embodiment. It is the shutter device for entrances and exits for opening and closing the opening part 10 of this. In addition, the shutter device has its own weight and manual operation of the shutter curtain 1, or the shutter curtain 1 is closed and moved downward by a driving device whose specific structure will be described later, and the shutter curtain 1 is moved upward by manual operation or this driving device. It is a combination of manual type and automatic type that move open.

  A guide rail 2 extending vertically is attached to a building housing 11 made of walls, columns, and the like that form the left and right sides of the opening 10, and both widthwise ends of the shutter curtain 1 are installed inside these left and right guide rails 2. 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 above the opening 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 laid horizontally inside 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 position of the lintel of the lower surface 3A of the shutter 3, and when the seat plate 1A reaches the floor 10A of the opening 10, the shutter curtain 1 is fully opened. Closed position. Therefore, the region from the fully open position to the fully closed position is the vertical opening / closing movement length H of the shutter curtain 1, that is, the opening / closing movement area H.

  In the shutter device according to the present embodiment, the left and right width dimension D of the shutter curtain 1 is shorter than the vertical opening / closing movement length H.

  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.

  In addition, as shown in FIG. 1, an operating means for automatically opening and closing the shutter curtain 1 on the building housing 11 near the guide rail 2 of one of the pair of left and right guide rails 2 (right side in FIG. 1). A push button type opening / closing switch 12 is provided. The open / close switch 12 includes an open button 13, a close button 15, and a stop button 14, and is connected to an open / close machine 50 that is a drive device attached to the central axis of the winding body 4 through a lead wire 16. It is connected. The opening / closing machine 50 whose specific configuration will be described later includes a drive unit including an electric motor and a brake, and a control panel as a control unit.

  When the open button 13 of the opening / closing switch 12 is operated, one of the forward / reverse driving of the electric motor of the opening / closing machine 50 is performed, whereby the shutter curtain is rotated by one of the forward / reverse rotations of the winding body 4. 1 moves while being wound around the winding body 4. The shutter curtain 1 is guided by a pair of left and right guide rails 2 to open, and the seat plate 1A reaches the lintel forming the lower surface of the shutter case 3, and an upper limit switch (not shown) provided in the switch 50 is Until the shutter curtain 1 is actuated, the shutter curtain 1 is wound around the winding body 4 so that the shutter curtain 1 brings the opening 10 into a fully open state or a substantially fully open state.

  On the other hand, when the close button 15 of the open / close switch 12 is operated, the other of the forward / reverse drive of the electric motor of the opening / closing machine 50 is driven, and thereby the other of the forward / reverse rotations of the winding body 4 is performed. The shutter curtain 1 is closed while being unwound from the winding body 4, the seat plate 1A comes into contact with the floor 10A, the lower limit switch (not shown) provided in the switch 50 is activated, and the shutter curtain 1 is fully closed. Alternatively, the opening 10 is closed by the shutter curtain 1 by being substantially fully closed. At this time, the shutter curtain 1 is maintained in a fully closed state or a substantially fully closed state by an automatic or manual operation of a lock mechanism (not shown).

  In addition, in order to perform the opening / closing operation | movement of this shutter curtain 1 manually, it is possible by pulling the manual switching wire which is a manual switching means (not shown).

  In the present embodiment, the opening / closing switch 12 is a wired opening / closing switch connected to the opening / closing device 50 by the lead wire 16, but is attached to the transmitter and the opening / closing device 50 that transmits a wireless opening / closing control signal. A wireless open / close switch configured to include a receiver with an antenna for receiving a radio signal transmitted from the transmitter may be further provided.

  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. The winding body for winding the shutter curtain 1 in order to move the shutter curtain 1 in order to close and move the shutter curtain 1 by rotation to one of them, and to open and move the shutter curtain 1 by rotation in the other direction. The center shaft 20 is supported by the left and right brackets 5 described with reference to FIG. 1 so as not to rotate. The winding body 21 has a length extending in the axial direction of the central shaft 20 in the illustrated example, with a plurality of the central shafts 20 penetrating through the central shaft 20 in the illustrated example. The bar-shaped member 23 made of a pipe, a flat bar, or the like is formed by including a bar-shaped member 23 serving as a connecting member that connects these rotating bodies 22 arranged apart from each other in the direction. 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. In the internal space S of the cup-shaped member 24, a spiral spring 26, which is a return spring according to this embodiment and is spirally wound from one end to the other end, is accommodated. The spiral spring 26 is a mainspring spring in which a plate material is spirally wound at the same position or substantially the same position in the axial direction of the central shaft 20.

  As shown in FIG. 2, the mainspring springs 26 are provided on all the rotary bodies 22, and the mainspring springs 26 are made of the same material and have the same dimensions such as thickness and width. Since the plate material having the same overall length is produced by winding the same number of times in the same direction, the return spring used in this embodiment is one kind of spring. In addition, since these mainsprings 26 wind the board | plate material which has the same full length in the same direction by the same frequency | count, the to-be-latched part of each cup-shaped member 24 in each mainspring spring 26 mutually The central angle around the axis in the axial circumferential direction of 24E and the central angle between the slits 27A of the core members 27 are the same or substantially the same.

  The wheel member 25 has a shallow dish shape having an annular flange portion 25A forming an outer peripheral surface and an end surface portion 25B provided at one end portion of the annular flange portion 25A in the axial direction of the central shaft 20. 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 coupler 29, so that the core member 27 is a non-rotating member that does not rotate like the central shaft 20. ing. 3 includes a bolt that penetrates the core member 27 and the central shaft 20, and a nut that is screwed to the tip of the bolt that protrudes on the opposite side of the core member 27. The coupler 28 is used to fasten the inner ring member 35B and 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 26 </ b> B that is the other end portion of the mainspring spring 26 is bent to be locked to the locked portion 24 </ b> E of the trunk portion 24 </ b> C of the cup-shaped member 24. The locked portion 24E having a length extending in the circumferential direction of the winding body 4 is partly 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 to be locked portions of the slit 27A of the core member 27 and the trunk portion 24C of the cup-shaped member 24. 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 body 21 rotates about the central axis 20 in the direction in which the shutter curtain 1 wound around 25A is fed out, the inner end portion 26A and the outer end portion 26B are separated from the slit 27A and the locked portion 24E. The mainspring spring 26 can be wound up without detaching.

  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. Accordingly, when the shutter curtain 1 is opened and moved upward by manual operation using the handle portion 6 and the operation rod described above, this opening movement can be performed lightly.

  Further, between the two rotating bodies 22 of the plurality of rotating bodies 22 in the central axis 20 (in FIG. 2, as will be described later, the left end rotating body 22 and the right side of the rotating body 22 are adjacent to each other. An opening / closing machine 50 as a driving device for applying a rotational force of forward / reverse rotation to the winding body 4 is attached between the rotating body 22 and the disposed rotating body 22.

  FIG. 6 shows an initial state of winding of the mainspring spring 26, and FIG. 7 shows an end state of winding. 6, the outer layer portion of the mainspring spring 26 is a tightly wound portion 26 </ b> C in which two winding portions adjacent in the inner and outer radial directions are in contact with each other, and the inner layer portion is in the inner and outer radial directions. The two winding portions adjacent to each other are coarse winding portions 26D that are not in contact with each other, and at the end of winding in FIG. 7, the outer layer portion of the mainspring spring 26 is adjacent to the two inner and outer radial directions. The winding portion is a coarse winding portion 26E that is not in contact with each other, and the inner layer portion is a close winding portion 26F in which two winding portions adjacent in the inner and outer diameter directions 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 in which two winding portions adjacent in the inner and outer diameter directions are not in contact with each other.

  By the way, as described above, the mainspring 26, which has the inner end portion 26 </ b> A locked by the core member 27 coupled to the center shaft 20 and is tightened by the extension of the shutter curtain 1, has the center shaft 20 in terms of material mechanics. It can be considered that it is the same as a cantilever with one end on the side being a fixed end and the other end being a free end. The elastic modulus of the cantilever is E, the section modulus is I, the length is L, and when the bending moment (torque) T is applied to the cantilever, the deflection angle θ (radian) at the free end of the cantilever ) Occurs, the equation T = EIθ / L is established in terms of material mechanics.

Then, when the width of the spiral spring 26 b, the thickness is h, the section modulus I of spiral spring 26 is I = ^bh 3/12. Further, the deflection angle θ is a value corresponding to the number of windings N of the mainspring spring 26, and the deflection angle θ when the number of windings is 1 is θ = 2π.

Therefore, when the number of turns of the mainspring spring 26 is N, 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 26 generated by the winding of the mainspring spring 26, that is, around the central axis 20 of the winding body 4. L is the effective length of the mainspring spring 26 in which the number of windings is N, that is, the length of the portion of the entire length of the mainspring 26 that is not in contact with the inside or outside of the entire length. This is because the original spring force is not generated by the contact of the entire length of the mainspring spring 26 that is in contact with the inside and outside of the entire length of the mainspring spring 26.

In FIG. 6, which shows an initial state of winding of the mainspring spring 26, the outer layer portion that occupies most of the mainspring spring 26 is wound by two winding portions adjacent in the inner and outer radial directions. Since the closely wound portions 26C are in contact with each other, the effective length L at this time is short. When winding of the mainspring spring 26 starts from the state of FIG. 6, the number N of windings increases and an effective length L is generated from the densely wound portion 26 </ b> C, and this effective length L gradually increases. At this time, since the effective length is still short, as can be seen from the above equation T = πEbh ³ N / 6L, the torque T due to the return spring force of the mainspring spring 26 increases at a gradually increasing rate.

  Thereafter, when the mainspring spring 26 is further tightened, the above-described closely wound portion 26C in which the two adjacent winding portions in the inner and outer diameter directions are in contact with each other gradually disappears, and the effective length L becomes the mainspring spring 26. Therefore, the increase rate of the torque T due to the return spring force of the mainspring spring 26 gradually decreases with the progress of the tightening of the mainspring spring 26. Decreases to a constant value or substantially constant value. That is, the torque T increases linearly or substantially linearly as the mainspring 26 is tightened.

Thereafter, when the mainspring spring 26 is further tightened, the state of FIG. 7 is approached, and therefore, the inner layer portion of the mainspring spring 26 has a closely wound portion 26F in which two winding portions adjacent to each other in the inner and outer diameter directions are in contact with each other. Since the tightly wound portion 26F increases as the tightening of the mainspring spring 26 proceeds, the effective length L gradually decreases, and the number of turns N increases. As can be seen from the above equation T = πEbh ³ N / 6L, the torque T due to the return spring force 26 increases at a gradually increasing rate, and is shown in FIG. 7 at the end of tightening of the mainspring spring 26. Thus, most of the winding of the mainspring spring 26 is a closely wound portion 26F in which two winding portions adjacent in the inner and outer diameter directions are in contact with each other.

  FIG. 8 is a graph in which the horizontal axis represents the number of rotations of the winding body 4 that winds the mainspring spring 26, and the vertical axis represents the torque around the central axis 20 of the winding body 4. FIG. 8 shows a line A indicating the change of the torque T expressed as the total torque of all the mainspring springs 26 with respect to the rotational speed of the winding body 4. As can be seen from the above description, the line A starts with the initial stage of tightening shown in FIG. 6, and the torque T increases at an increasing rate that gradually decreases as the number of rotations of the winding body 4 increases. 1 region a, a second region b in which the rate of increase of the torque T becomes a constant value or a substantially constant value following this region a, and a third region in which the torque T gradually increases after this region b. It consists of the area | region c, and the end point of this area | region c is the winding tightening end of the mainspring spring 26 shown by FIG. The rotational speed of the winding body 4 and the number of windings N of the mainspring spring 26, which are the horizontal axes of the graphs of FIG. 8 and FIG. 9 to be described later, are as follows. The number of windings N is increased by 1.

  FIG. 8 also shows the fully opened position of the shutter curtain 1 that coincides with the boundary position between the initial winding range α and the intermediate range β for the mainspring spring 26, the intermediate range β, and the final tightening range γ. The fully closed position of the shutter curtain 1 that coincides with the boundary position is shown. As can be seen from these ranges α, β, and γ, the fully open position of the shutter curtain 1 is in the first region a where the torque T increases at an increasing rate that gradually decreases, and the fully closed position of the shutter curtain 1 Is in the second region b where the rate of increase of the torque T is a constant value or a substantially constant value.

  Further, FIG. 8 also shows a torque B around the central axis 20 of the winding body 4 that is required when the shutter curtain 1 is opened and moved upward. This torque B is the weight of the shutter curtain 1 shown in FIG. 5 that is drawn out from the winding body 4 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 downward resistance generated based on the friction between the guide rail 2 and the shutter curtain 1 shown in FIG. The self-weight torque due to the self-weight W of the shutter curtain 1 is the self-weight W and the horizontal distance from the central portion of the central shaft 20 shown in FIG. 5 to the position where the self-weight W acts, in other words, from the center of the central shaft 20. It is a value obtained by integrating the winding diameter R of the shutter curtain 1.

  FIG. 8 also shows the torque C around the central axis 20 of the winding body 4 that attempts to close and move the shutter curtain 1 downward. This torque C 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 This is a value obtained by subtracting the resistance torque around the central axis 20 due to the upward resistance generated based on friction with the curtain 1 or the like.

  As described above, the self-weight torque in both the torque B and the torque C includes the self-weight W of the portion of the shutter curtain 1 fed out from the winding body 4 and the winding diameter of the shutter curtain 1 from the central portion of the central shaft 20. Both the self-weight W and the winding diameter R are related to the amount of the shutter curtain 1 fed out from the winding body 4 (the number of rotations of the winding body 4). Further, the resistance torque generated when the shutter curtain 1 is opened and moved upward and the resistance torque generated when the shutter curtain 1 is closed and moved downward are the shutter curtain 1 shown in FIG. It is a constant value or a substantially constant value over the entire vertical opening / closing movement length H.

  When the shutter curtain 1 that has been fully opened is drawn out by rotating the winding body 4 by a predetermined angle such as one rotation, the winding diameter R when the shutter curtain 1 is fully open is large. The length of the shutter curtain 1 that is drawn downward by the rotation of the winding body 4 is longer than that of the rotation of the winding body 4 that starts when the shutter curtain 1 is not fully opened. Become. For this reason, the winding diameter R is reduced by the rotation of the winding body 4 that extends the shutter curtain 1 from the fully open position, but the lowering length of the shutter curtain 1 is less than the reduction of the winding diameter R. This contributes to an increase in the own weight torque of the curtain 1. For this reason, when the shutter curtain 1 is extended from the fully open position, the rate of increase of the own weight torque of the shutter curtain 1 is large.

  Note that 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 torques B and C do not change smoothly as shown in FIG. 8, but change as shown in the torques B and C in FIG.

  According to this embodiment, as described above, the mainspring 26 is a spring having a region a where the torque T due to the accumulated return spring force gradually increases at an increasing rate, and in this region a, There is a time when the opening / closing body is fully opened before the shutter curtain 1 starts to be unwound due to one rotation of the winding body 4, and the torque T increases with the unwinding of the shutter curtain 1 after the opening / closing body is fully opened. Therefore, the spring characteristic of the mainspring spring 26 is that the change in the self-weight torque of the shutter curtain 1 when the shutter curtain 1 is extended downward from the fully open state, in other words, the torque represented by the lines B and C including the resistance torque. Therefore, the shutter curtain 1 can be smoothly opened and closed vertically by the relationship with the return spring force of the mainspring spring 26. It can be.

  In addition, since the spring characteristic is matched with the self-weight torque of the shutter curtain 1 when the shutter curtain 1 is extended downward from the fully opened state, only the mainspring spring 26 as a return spring is used. Since there is no need to use a combination of springs, it is effective in terms of the number of parts and the configuration of the return spring.

  When the shutter curtain 1 is fully extended from the fully open position, the winding diameter R decreases, so that the winding body 4 rotates at a predetermined angle such as one rotation in order to extend the shutter curtain 1 downward. The extended length of the shutter curtain 1 is gradually shortened. For this reason, when the payout from the fully open shutter curtain 1 proceeds, the increase rate of the own weight torque of the shutter curtain 1 becomes a constant value or a value approximated to a constant value, and the increase rate of the own weight torque becomes such a value. In this embodiment, the shutter curtain 1 reaches the fully closed position.

  The mainspring spring 26 of the present embodiment has the region b in which the rate of increase of the torque T is a constant value or a substantially constant value following the region a. In this region b, the shutter curtain 1 is Because the shutter curtain 1 is fully closed, the unwinding of the shutter curtain 1 proceeds until the shutter curtain 1 is fully closed, and the spring characteristic of the mainspring spring 26 is the change in its own weight torque of the shutter curtain 1, in other words, The torque characteristics represented by the lines B and C including the resistance torque are matched.

In FIG. 8, lines A ₁ and A ₂ are shown. 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 actuality of the spring spring 26. shows a 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, while spiral spring 26 is wound up to the fully closed position the shutter curtain 1 from the fully open position a case is reached, the line a ₂ are the opposite case.

As shown in FIG. 8, the torque indicated by the line B is larger than the torque indicated by the lines A ₁ and A ₂ for the entire vertical opening / closing movement length H of the shutter curtain 1. In addition, since the torque indicated by the line C is smaller than the torque indicated by the lines A ₁ and A ₂ , an opening movement operation force or a closing movement operation force is not applied to the shutter curtain 1. The shutter curtain 1 can be stopped at an arbitrary position of the vertical opening / closing movement length H, and in order to open and move the shutter curtain 1, the torque and the line B indicated by the lines A ₁ and A ₂ are used. becomes better if caused to act an operating force corresponding to the difference between the indicated torque to the shutter curtain 1, to move to close the shutter curtain 1, the line a ₁ It becomes better if caused to act an operating force corresponding to a difference between the torque indicated by the torque and the line C indicated by A ₂ to the shutter curtain 1.

  The operating force is due to manual operation, but can also be applied to the case where the operating force is applied by the opening / closing device 50 as a driving device. In this way, the operating force is applied by the opening / closing device 50. The shutter curtain can be opened and closed by a small driving force of the electric motor of the opening / closing machine 50.

FIG. 9 shows an embodiment in which a mainspring 26 having different spring characteristics is used. In FIG. 9, those corresponding to A, A ₁ , A ₂ , a, b, c, α, β, γ in FIG. 8 are A ′, A ′ ₁ , A ′ ₂ , a ′, b ′, Indicated as c ′, α ′, β ′, γ ′.

In this embodiment, the shutter curtain of torque T (including the torque taking into account the hysteresis expressed by the lines A ′ ₁ and A ′ ₂₎ due to the return spring force of the mainspring spring 26 represented by the line A ′. The value of 1 when fully opened is larger than the value of the aforementioned torque represented by lines B and C when the shutter curtain 1 is fully opened. For this reason, when the shutter curtain 1 reaches the fully open position, the seat plate 1A at the lower end of the shutter curtain 1 comes into contact with the lower surface 3A of the shutter case 3 described with reference to FIG. The shutter curtain 1 is automatically moved to the fully open position where the seat plate 1A comes into contact with the lintel by moving the shutter curtain 1 to the fully open position by manual operation. Will do.

  Also in this embodiment, as in the embodiment described with reference to FIG. 8, the fully open position of the shutter curtain 1 is in the region a ′ where the torque T of the mainspring spring 26 gradually increases and decreases, The fully closed position of the shutter curtain 1 is in a region b ′ where the rate of increase of the torque T of the mainspring spring 26 is a constant value or a substantially constant value.

  The torques A and A ′ in the graphs of FIGS. 8 and 9 described above are the total values of the torques (substantially equal to each) by the mainspring springs 26 provided on the winding body 4.

  8 and 9, when the shutter curtain 1 reaches the fully open position, the shutter curtain is prevented from closing and moving downward even if an unexpected downward external force acts on the shutter curtain 1. Therefore, the winder body 4 is provided with a manual brake device for preventing the winder body 4 from rotating, or the shutter curtain constituting member such as a seat plate can be freely engaged and disengaged at the place where the lintel is disposed. A manual stop device having an engaging member that engages with the shutter curtain 1 may be provided so that when the shutter curtain 1 is closed and moved downward, the brake device and the stop device can be released manually. Good. These brake devices and stop devices may automatically operate so that the shutter curtain 1 does not rebound, for example, when the shutter curtain 1 reaches the fully open position from the position that is not the fully open position.

  The mainspring spring 26, which is housed in the internal space S of each cup-shaped member 24 constituting the winding body 4 of FIG. 3 and serves as a return spring, may have the spring characteristics shown in FIG. 9 may have the spring characteristic shown in FIG.

  In order to allow the mainspring spring 26 having these spring characteristics to be used at the up / down opening / closing movement length H in FIG. 1, the mainspring spring 26 is tightened when the shutter curtain 1 is fully opened or fully closed. 8 and 9 must be able to realize the torque characteristics, and an operation capable of realizing this must be performed on the mainspring spring 26. This operation is performed as follows.

  Before the winding core member 27 of each rotating body 22 is coupled to the central shaft 20 by the coupler 29 shown in FIG. 3, the winding body 4 formed by the rotating body 22 and the bar-shaped member 23. 3 is rotated with respect to the central axis 20 by the tool 40 shown in FIG. 3 while being stopped by a restraining tool or the like (not shown), thereby being stored in the internal space S of the cup-shaped member 24. Each mainspring spring 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. Each of the mainspring springs 26 is wound by such a rotation operation. In other words, the operation of accumulating the return spring force to the mainspring springs 26 is performed in FIGS. 8 and 9. This is performed until the torque 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.

  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 of the mainspring spring 26 reaches a predetermined value, the mainspring spring 26 is tightened. Even when the work is finished, the core member 27 and the rotating body 22 are fixed to the central shaft 20 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. can do. 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 upper end portion of the shutter curtain 1 to which the seat plate 1A is attached in advance is inserted while being lifted from below to the lintel formed on the lower surface 3A of the shutter case 3 shown in FIG. As described above, the operation of coupling the upper end portion of 1 to the annular flange portion 25A of the wheel member 25 of each rotating body 22 is performed. At this time, the shutter curtain 1 is lowered to a substantially fully closed position. 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. Then, the shutter curtain 1 is wound up to the fully open position. Thereafter, an operation of installing the left and right guide rails 2 is performed. At this time, the guide rails 2 are inserted so that both end portions in the width direction of the lower end portion of the shutter curtain 1 are inserted into the upper end portions of the left and right guide rails 2. Is moved to the installation position.

  With the shutter curtain 1 lowered to the substantially fully closed position, 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 are inserted. By removing the nut from the bolt that has been removed and pulling out the bolt, the return spring force accumulated in the mainspring spring 26 is in a releasable state, and the winding body comprising the respective rotating bodies 22 and bar-like members 23. Since the main body 21 is rotatable about the central axis 20, the winding body 4 applies the return spring force already accumulated in the mainspring spring 26 as a rotational biasing force by applying a small pushing force to the shutter curtain 1. The shutter curtain 1 is rotated to open and move while being used, and the shutter curtain 1 reaches the fully open position.

  As a result of the above-described operations, the tightening state of all the mainspring springs 26 when the shutter curtain 1 is fully opened or fully closed can realize the torque characteristics shown in FIGS.

  Next, the opening / closing machine 50 that is attached to the central shaft 20 of the winding body 4 shown in FIG. 2 and that is a driving device for applying a rotational force of forward and reverse rotation to the winding body 4 will be described. FIG. 10 is an enlarged view of the switch 50 in a state in which the winding body 4 shown in FIG. 2 is rotated 90 degrees or substantially 90 degrees from the back side to the near side, and FIG. 11 shows S11 in FIG. FIG.

  As shown in FIG. 2, of the four rotating bodies 22 constituting the winding body 21 of the winding body 4, the two rotating bodies 22 disposed adjacent to each other in the axial direction of the central axis 20. As shown in FIG. 11, there is an upper bracket member 57 and a lower bracket member between the leftmost rotary body 22 and the rotary body 22 disposed adjacent to the right side of the rotary body 22 in FIG. The upper bracket member 57, which is coupled to each other by a coupling tool 59 such as a screw while sandwiching the central shaft 20 and is prevented from rotating with respect to the central shaft 20 by a detent member 60 using a long-axis screw or the like, is illustrated in FIG. As shown in FIG. 2 and FIG. 10, the electric motor 51, the brake 52, the speed reducer 53, and the control panel 54 are integrally attached. The electric motor 51, the brake 52, and the speed reducer 53 constitute a drive unit of the switch 50, and the control panel 54 is a control unit of the switch 50. A pinion gear 55 is attached to the drive shaft 51 </ b> A of the electric motor 51 of the switch 50. Although not shown, the drive unit of the switch 50 also includes a lower limit switch and an upper limit switch.

  A ring gear 56 is attached to the bar-like member 23 which is a connecting member for connecting the respective rotating bodies 22, and this attachment is performed by attaching the bar-like member 23 to a recess 56 </ b> A formed in the ring gear 56 as shown in FIG. 11. The pinion gear 55 is meshed with teeth 56B formed on the inner peripheral portion of the ring gear 65. Thereby, forward / reverse rotational force is applied from the opening / closing machine 50 to the winding body 4 via the pinion gear 55 and the ring gear 56.

  In addition, although the electric power supplied to the switch 50 is supplied from an external power source connected by a lead wire (not shown), a battery power source may be attached to the switch 50.

  In this embodiment, the opening / closing machine 50 is attached to the central shaft 20, and the maximum dimension in the diameter direction of the central shaft 20 of the opening / closing machine 50 is the three bar-shaped members 23 constituting the winding body 21. It is smaller than the diameter of the enclosed circle (more precisely, the inner diameter), and is arranged on the inner side in the diameter direction of the central axis 20 than these bar-shaped members 23.

  In the present embodiment, the opening / closing device 50 is disposed between two rotating bodies 22 arranged adjacent to each other in the axial direction of the central shaft 20, and is provided on each rotating body 22. The return spring is a mainspring spring 26 which is a spiral spring having a smaller axial dimension (a width dimension in the axial direction) of the central shaft 20 than a torsion coil spring or the like. The axial dimension of the handle 4 is small.

  For this reason, according to this embodiment, compared with the shutter apparatus provided with the conventional return spring which has arrange | positioned the opening / closing machine 50 on a different axis from the winding body 4, size reduction of the whole shutter apparatus can be achieved. It becomes like this.

  According to the embodiment described above, the mainspring spring 26 has the regions a and a ′ in which the torque T due to the return spring force accumulated by the unwinding of the shutter curtain 1 from the winding body 4 gradually increases. (Refer to FIG. 8 and FIG. 9). In this region a, a ′, there is a fully opened time before the shutter curtain 1 starts to be unwound by one rotation of the winding body 4, and this fully opened. Since the torque T increases as the shutter curtain 1 is extended from the time, it has a spring characteristic that matches the change in its own weight torque when the shutter curtain 1 is extended downward from the fully open position. The mainspring 26 can be used to constitute a shutter device.

  The mainspring spring 26 is a spring having regions b and b ′ (see FIGS. 8 and 9) in which the rate of increase of the torque T becomes a constant value or a substantially constant value as the shutter curtain is advanced. Since there is a time when the shutter curtain 1 is fully closed in the regions b and b ′, the mainspring spring has a spring characteristic adapted to the change in the own weight torque of the shutter curtain 1 over the entire range from the fully open to the fully closed of the shutter curtain 1. 26 can be used to form a shutter device.

  In the 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 has a diameter of the central shaft 20. 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 rotating body 22 is formed as described above. It has a shape and structure having an upstanding 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 the embodiment described so far, as shown in FIG. 2, each rotating body 22 is arranged so that the cylindrical portion 24 </ b> C is on the same side in the axial direction of the central shaft 20 with respect to the rising portion 25 </ b> B. Is arranged. 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.

  In the embodiments described so far, the inner end portion 26 </ b> A of the mainspring spring 26 is not locked to the central shaft 20, and the inner end portion 26 </ b> A is a core member prepared for each rotating body 22. 27, the mainspring spring unit including the rotating body 22, the mainspring spring 26, and the core member 27 can be formed with respect to one mainspring spring 26, and a plurality of mainspring spring units are centered. The mainsprings 26 are arranged on the central shaft 20 only by being arranged on the shaft 20, and the main body of the winding body described above is connected by connecting the mainspring spring units with the bar-shaped member 23 described above. 21 can be formed, and these operations can be easily performed.

  Furthermore, in the embodiment described so far, each rotating body 22 is not formed by a single 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 which is a member, the rotating body 22 having the locked portion 24E can be easily manufactured by press working or the like.

  Further, the return spring in the embodiments described so far is the mainspring spring 26, 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.

  Since the mainspring spring 26 is a spring whose axial dimension is smaller than that of a torsion coil spring or the like, as shown in FIG. Even if it is arranged in the direction, the axial length of the central shaft 20, that is, the axial dimension (axial dimension) of the wound body 4 that winds and feeds the shutter curtain 1 can be shortened. Therefore, as described in FIG. 1, the shutter device in which the left-right width dimension D of the shutter curtain 1 is smaller than the vertical opening / closing movement length H of the shutter curtain 1, in other words, the vertical opening / closing movement length of the shutter curtain 1. The embodiment described so far can be applied to a shutter device in which the height H is larger than the left and right width dimension D of the shutter curtain 1.

  FIG. 12 is a view showing a winding body structure with a return spring according to another embodiment, and is the same view as FIG. 2. 13 is a cross-sectional view taken along line S13-S13 in FIG. 12, and FIG. 14 is a cross-sectional view taken along line S14-S14 in FIG.

  As shown in FIG. 12, the opening / closing device 150 that is a drive device according to this embodiment includes an electric motor 151, a brake 152, a speed reducer 153, and a control panel 154, similar to the opening / closing device 50 shown in FIG. 2. Unlike the switch 50 shown in FIG. 2, the control panel 154 that is a control unit of the drive unit includes an electric motor 151, a brake 152, and a speed reducer that constitute the drive unit of the drive unit. It is separated from 153 and attached to the central shaft 120.

  Similarly to the opening / closing machine 50 shown in FIG. 2, a ring gear 156 is attached to the bar-like member 23 which is a connecting member for connecting the respective rotating bodies 122, and this attachment is as shown in FIG. Further, this is performed by fitting the bar-like member 23 into the concave portion 156A formed in the ring gear 156, and the pinion gear 155 meshes with the teeth 156B formed on the inner peripheral portion of the ring gear 156. Thereby, the rotational force of forward / reverse rotation is applied from the opening / closing machine 150 to the winding body 104 having the winding body main body 121 and the central shaft 120 via the pinion gear 155 and the ring gear 156.

  As shown in FIG. 13, the upper bracket member 157 and the lower bracket member 158 are central axes between the left end rotating body 122 and the rotating body 122 disposed adjacent to the right side of the rotating body 122. The upper bracket member 157, which is coupled to each other by a coupling tool 59 such as a screw while sandwiching 120, and is prevented from rotating with respect to the central shaft 120 by a rotation preventing member 160 using a long screw or the like, drives the switch 150. The electric motor 151, the brake 152, and the speed reducer 153 that constitute the unit are attached, and a pinion gear 155 is attached to a drive shaft 151A (see FIG. 12) of the electric motor 151. As in the embodiment shown in FIG. 2, the drive unit of the switch 150 includes a lower limit switch and an upper limit switch (not shown).

  On the other hand, between the rotating body 122 disposed adjacent to the right side of the leftmost rotating body 122 and the rotating body 122 disposed adjacent to the right side of the rotating body 122, the upper bracket member 161 and the lower bracket The upper bracket member 161, in which the member 162 is coupled to each other by a coupling tool 59 such as a screw while sandwiching the central shaft 120 and is prevented from rotating with respect to the central shaft 120 by a rotation preventing member 170 such as a long-axis screw, The control panel 154 separated from the electric motor 151, the brake 152, and the speed reducer 153 is attached.

  The control panel 154, the electric motor 151, the brake 152, and the speed reducer 153 are connected by a lead wire 165 (see FIG. 14). The lead wire 165 is solid as shown in FIG. The central shaft 120 is inserted into a recess 120A (see FIGS. 13 and 14), which is a notch formed over the entire axial length of the central shaft 120, and is stored therein. For this reason, in this embodiment, the lead wire 165 does not get in the way inside the winding body main body 121 of the winding body 104. The recess 120A, which is a notch, does not have to be formed over the entire axial length of the central shaft 120. Of the total axial length of the central shaft 120, the portion to which the switch 150 is attached or a core member It may be partially formed such as a portion to which 27 is attached. The lead wire 165 may be a lead wire as power supply means, a lead wire as signal transmission means, or both.

  The electric power supplied to the electric motor 151 or the like that is the drive unit of the switch 150 is supplied from an external power source connected by a lead wire (not shown) inserted through the recess 120A. On the other hand, a dedicated battery power source (not shown) is built in the control panel 154, and the control panel 154 is operated by power supplied from the battery power source. The control panel 154 is also supplied from an external power source. It may operate by electric power. Electric power is supplied from an external power source to the control panel 154, and power is supplied from the control panel 154 to the electric motor 151 connected to the control panel 154 through the lead wire 165, and the control panel 154 is supplied to the electric motor 151. The operation of the electric motor 151 may be controlled by turning on and off the power supply. It is also possible to supply power to drive units other than the electric motor 151 via the control panel 154.

  As described above, in this embodiment, the control panel 154 of the switch 150 is separated from the electric motor 151, the brake 152, and the speed reducer 153 and attached to the center shaft 120. It becomes possible to make the maximum dimension in the diameter direction of 120 smaller. This makes it possible to reduce the diameter dimension of the ring gear 156 as shown in FIG. 13, and as shown in FIG. 12, the rising of the rotating body 122 constituting the winding body main body 121 of the winding body 104. The diameter dimension of the part 125 can also be reduced.

  Therefore, according to the present embodiment, it is possible to further reduce the size of the entire shutter device as compared with the embodiment shown in FIG.

  In this embodiment, the rotating body 122 is disposed between the control panel 154, the electric motor 151, the brake 152, and the speed reducer 153, but the control panel 154, the electric motor 151, the brake 152, the speed reducer 153, and the like. May be arranged between the two rotating bodies 122. The control panel 154 may be divided and arranged with the rotating body 122 interposed therebetween.

  FIG. 15 shows another embodiment of a notch formed in the central shaft 120 shown in FIG. As shown in FIG. 15, the cutout portion formed in the central shaft 120 may be a cutout portion 120 </ b> B in which the upper portion of the central shaft 120 is cut out horizontally or substantially horizontally. In short, the cutout portion may be any shape as long as the lead wire 165 can be inserted and stored.

  FIG. 16 shows a cross-sectional view of the central shaft 120 having a hollow portion and a lead wire 165 inserted through the hollow portion. The central shaft 120 shown in FIG. 16 is formed of a hollow member such as a pipe having a hollow portion 120D inside, similar to the central shaft 20 according to the embodiment shown in FIG. Two holes 120 </ b> C are provided apart from each other in the axial direction of the central shaft 120. In this embodiment, after the lead wire 165 is inserted into the hollow portion 120D of the central shaft 120 from one of the two holes 120C, the leading end portion of the inserted lead wire 165 is inserted from the other hole 120C. The lead wire 165 is housed in the hollow portion 120D of the central shaft 120 by picking out (pulling out). In this embodiment, it is preferable in terms of construction if the lead wire 165 is removable from the drive unit and / or the control unit of the switch.

  In the embodiment of FIG. 16, the central shaft 120 is not formed with two holes 120C, but one long hole is formed in the axial direction of the central shaft 120, and the lead wire 165 is formed from the long hole. May be stored so as to be pushed into the hollow portion 120D of the central shaft. In this case, even if the lead wire 165 is not removable from the drive unit and the control unit of the switch, the workability is not greatly impaired.

  FIG. 17 shows a winding structure with a return spring according to still another embodiment. In this embodiment, the drive device is the same as the switch 50 shown in FIG. 2, but unlike the embodiment of FIG. 2, this switch 50 is one end of both ends of the central shaft 20. (A right end portion in FIG. 17).

  And the number of the rotary bodies 22 which comprise the wound body main body 221 of the wound body 204 is two, but rotation of one of these rotary bodies 22 is shown in FIG. Rotating body 22 (located on the opening / closing device 50 adjacent to the inner side in the axial direction of the central shaft 20) (in other words, the rotating body 22 on the right side in FIG. 17) The cylindrical portion 24 and the core member 27 are obtained by inverting the cylindrical portion 24 and the core member 27 of the left rotating body 22 which is the other rotating body in the axial direction of the central shaft 20.

  In FIG. 17, the direction of the locked portion 24E of the cylindrical portion 24C of the right rotating body 22 is not shown, but the direction of the locked portion 24E of the cylindrical portion 24C of the left rotating body 22 It is the same. The reason for this structure is that the right rotating body 22 in which the axial direction of the central shaft 20 is simply reversed is a locked portion for locking the outer end portion 26B of the mainspring spring 26. The direction of 24E is opposite to the direction of the locked portion 24E of the left rotating body 22, and the outer end portion 26B cannot be locked to the locked portion 24E. It is because it cannot be tightened.

  In the present embodiment, the opening / closing machine 50 attached to the central shaft 20 is disposed so as to be spaced outward in the axial direction from the axial end of the winding body main body 221 of the winding body 204 that winds and feeds the shutter curtain 1. Therefore, the sleeve dimension of the winding body 204 (the dimension of the portion where the shutter curtain 1 is wound and not fed out) becomes longer. In other words, the axial dimension of the winding body 204 (the dimension of the portion where the shutter curtain 1 is wound and fed out) is shortened accordingly.

  However, in the present embodiment, the right rotating body 22 which is one rotating body of the two rotating bodies 22 is obtained by reversing the left rotating body 22 in the axial direction of the central axis 20. Yes. Therefore, according to the present embodiment, the shaft of the winding body 204 is compared with the case where the cylindrical portions 24 of the two rotating bodies 22 are arranged on the same side in the axial direction of the central shaft 20 with respect to the rising portion 25B. The dimension can be increased by the width dimension in the axial direction of the cylindrical portion 24 of the rotating body 22.

  FIG. 18 shows a winding body structure with a return spring according to still another embodiment. In this embodiment, which is a modified example of the embodiment of FIG. 17, the winding body 304 is wound in the vicinity of the end on the side where the opening / closing device 50 is attached, of both axial ends of the central shaft 20. A disk member 325 having the same or substantially the same diameter as the rising portion 25B of the rotating body 22 constituting the handle body 321 and having a hole into which each of the plurality of bar-shaped members 23 is inserted and coupled is formed. It is attached.

  Accordingly, the opening / closing machine 50 is disposed between the right rotating body 22 and the disk member 325, and the axial dimension of the winding body 304 of this embodiment is the same as that of the winding body 204 in FIG. It can be longer than the axial dimension. In other words, according to this embodiment, the sleeve size of the wound body 204 of FIG. 17 can be further shortened.

  19 and 20 show a modified example of the winding structure with a return spring according to the embodiment shown in FIG. FIG. 19 is a partially enlarged view of the front view of the wound body 4 ′ according to this modification, and is the same view as FIG. 2. 20 is a cross-sectional view taken along line S20-S20 in FIG.

  As shown in FIG. 19, also in this modification, as in the embodiment of FIG. 2, between the two rotating bodies 22 ′ constituting the winding body 21 ′ of the winding body 4 ′, FIG. As shown, the upper bracket member 57 ′ and the lower bracket member 58 ′ are coupled to each other with a coupling tool 59 such as a screw while sandwiching the central shaft 20, and the central shaft 20 is coupled to the central shaft 20 with a non-rotating member 60 such as a long-axis screw. An electric motor 51 ′, a brake 52 ′, a speed reducer 53 ′, and a control panel 54 ′ are integrally attached to the upper bracket member 57 that is prevented from rotating. The electric motor 51 ′, the brake 52 ′, and the speed reducer 53 ′ constitute a drive unit for the opening / closing machine 50 ′, and the control panel 54 ′ serves as a control unit for the opening / closing machine 50 ′. A pinion gear 55 'is attached to the drive shaft 51A' of the electric motor 51 'of the opening / closing machine 50'. A ring gear 56 'is attached to the bar-like member 23 connecting the respective rotating bodies 22', and a pinion gear 55 'meshes with teeth 56B' formed on the inner peripheral portion of the ring gear 56 '.

  In this modification, the maximum dimension in the diameter direction of the central shaft 20 of the opening / closing device 50 ′ attached to the central shaft 20 is that of the mainspring spring 26 housed in the cup-shaped member 24 constituting the rotating body 22 ′. It is smaller than the diameter dimension. For this reason, as shown in FIG. 19, the diameter dimension of the ring gear 56 ′ and the wheel member 25 ′ is also small (compared to FIG. 10), and as shown in FIG. The portion 24F is in contact with one of the three bar-like members 23.

  For this reason, according to the present modification, the diameter dimension of the winding body can be reduced to the same minimum size as in the case where there is no switch, and the entire shutter device is compared with the embodiment of FIG. Further downsizing can be achieved.

  In the present invention, the opening / closing body is wound to open / close the opening / closing body, and the winding body that is rolled out is accumulated during one of the forward and reverse rotations of the winding body for winding and unwinding. In order to provide a spiral spring which is a return spring used as an auxiliary force for the other rotation of the winding body, and to apply at least one rotational force of forward and reverse rotation to the winding body This drive device can be used when the opening / closing device is provided.

It is a front view showing the whole shutter device which is an opening-and-closing device with which a winding structure with a return spring concerning one embodiment of the present invention is adopted. 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 figure similar to FIG. 8 which shows embodiment at the time of using the mainspring spring from which a spring characteristic differs. It is an enlarged view of the switch which is a drive device attached to the central axis of the winding body of FIG. It is the S11-S11 line sectional view of FIG. It is a plane sectional view which shows the winding body structure with a return spring which concerns on another embodiment, and is a figure similar to FIG. It is the S13-S13 sectional view taken on the line of FIG. It is the S14-S14 sectional view taken on the line of FIG. It is a figure similar to FIG. 14 which shows another embodiment of the notch part formed in the central axis of the winding body of FIG. FIG. 15 is a view similar to FIG. 14 showing a cross-sectional view of the central axis having a hollow portion and a lead wire inserted through the hollow portion. It is a plane sectional view which shows the winding body structure with a return spring which concerns on another another embodiment, and is a figure similar to FIG. It is a plane sectional view showing a winding body structure with a return spring concerning still another embodiment, and is a figure similar to FIG. It is a figure which shows the modification of the winding body structure with a return spring which concerns on embodiment of FIG. 2, and is a figure similar to FIG. FIG. 20 is a cross-sectional view taken along line S20-S20 in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shutter curtain 4,104,204,304,4 'Winding body 20,120 Center axis 120A Recessed part 120B Notch part 120D Hollow part 21,121,221,321,21' Winding body Main body 22, 122, 22 ′ Rotating body 23 Bar-shaped member as connecting member 26 Mainspring spring as return spring 50, 150, 50 ′ Opening and closing device 51, 151, 51 ′ as driving device Electric motor as driving unit of driving device Motor 52, 152, 52 ′ Brake 54, 154, 54 ′ Drive unit control unit 156 Control panel 156 drive unit control unit 156 Lead wire a, a ′ Increase due to return spring force of mainspring spring gradually decreases Area that increases at a rate

Claims (11)

The return spring force is accumulated during one of the winding body that winds and unwinds the opening / closing body to move the opening / closing body and the forward / reverse rotation of the winding body for winding and unwinding. The accumulated return spring force is used as an auxiliary force for the other rotation of the winding body, and at least one of the forward and reverse rotations is applied to the winding body. A winding body structure with a return spring of an opening and closing device configured to include a drive device for
The winding body has at least a central axis that does not rotate during winding and unwinding, and can be rotated forward and backward around the central axis to wind and unwind the opening and closing body, and is disposed on the outer periphery of the central shaft A wound body main body, and
The return spring is a spiral spring that is spirally wound from one end to the other end at the same or substantially the same axial position of the central axis, and one end of the spiral spring is While being attached to the central shaft, the other end is attached to the winding body,
The winding structure with a return spring of an opening / closing device, wherein the driving device is attached to the central shaft.   The winding structure with a return spring of the switchgear according to claim 1, wherein the spiral spring is a mainspring spring formed by winding a plate material in a spiral shape. Body structure.   The winding body structure with a return spring of the switchgear according to claim 1 or 2, wherein a maximum dimension in a diameter direction of the central axis of the driving device is the same as or smaller than a diameter dimension of the winding body. A winding structure with a return spring of the switchgear.   The winding structure with a return spring of the switchgear according to claim 3, wherein a maximum dimension in a diameter direction of the central axis of the drive device is the same as or smaller than a diameter dimension of the spiral spring. Winding member structure with return spring for opening and closing device.   The winding body structure with a return spring of the switchgear according to any one of claims 1 to 4, wherein the winding body main body includes a plurality of rotating bodies disposed axially apart on an outer periphery of the central shaft. And a connecting member that connects the rotating bodies with a length extending in the axial direction of the central axis, and at least one rotation of the plurality of rotating bodies The other end of the spiral spring is attached to the body, and the drive device is arranged on the diametrically inner side of the central axis with respect to the connecting member. Body structure.   The winding structure with a return spring of the switchgear according to claim 5, wherein the driving device is disposed between two of the plurality of rotating bodies. Winder structure with a return spring of the device.   The winding structure with a return spring of the switchgear according to any one of claims 1 to 6, wherein the driving device is configured to apply at least one rotational force of the forward and reverse rotations to the winding body. A drive unit, and a control unit that executes drive control of the drive unit. The control unit is separated from the drive unit, and the control unit and the drive unit are arranged on the central axis. A winding structure with a return spring for an opening / closing device, wherein the winding body structure is spaced apart in the axial direction.   The winding structure with a return spring of the switchgear according to claim 7, wherein the control unit and the driving unit are connected by a lead wire, and the lead wire is connected to the central axis in the axial direction of the central axis. A winder structure with a return spring for an opening / closing device, characterized in that a notch portion inserted through is formed.   The winding structure with a return spring of the switchgear according to claim 7, wherein the control unit and the drive unit are connected by a lead wire, the central axis has a hollow portion, and the lead wire A winding structure with a return spring of an opening / closing device, wherein the winding body is inserted into a hollow portion.   The winding structure with a return spring of the opening and closing device according to any one of claims 1 to 9, wherein the opening and closing movement direction of the opening and closing body is a direction having a vertical component in which the upward movement is an opening movement, The spiral spring is a spring having a region in which the torque due to the accumulated return spring force gradually increases at an increasing rate, and the opening / closing member by the one rotation of the winding body is in this region. A winding structure with a return spring for an opening / closing device, wherein the opening / closing body is fully opened before the opening of the opening / closing body, and the torque increases with the opening / closing of the opening / closing body after the opening / closing body is fully opened.   The winding structure with a return spring of the switchgear according to claim 10, wherein the spiral spring has a region where the rate of increase of the torque becomes a constant value or a substantially constant value as the opening / closing body is advanced. A winding structure with a return spring for an opening / closing device, wherein the opening / closing body is fully closed when the opening / closing body is fully closed.

Images