JP4781811B2 - Winding shaft end structure of switchgear - Google Patents

Description

  The present invention relates to an opening / closing device in which a winding shaft that can be rotated forward and backward to wind and unwind an opening / closing body such as a shutter curtain is supported upward by a winding shaft support means disposed on the lower side. Involved in the winding shaft end structure, for example, a shutter device for disaster prevention that forms a disaster prevention zone with a shutter curtain extended from the winding shaft when a disaster such as a fire occurs, or an opening that opens and closes an opening such as an entrance / exit with the shutter curtain The present invention can be used for various shutter devices including a part shutter device and the like, and opening and closing devices such as smoke proof curtain devices and roll screen devices.

In Patent Document 1 below, a winding shaft that can be rotated forward and backward to wind and unwind a shutter curtain that is an opening / closing body is supported upward by a winding shaft support means arranged on the lower side. The shutter device is shown. In this shutter device in which bending of the winding shaft having a long dimension is prevented by the winding shaft support means, the winding shaft, a bracket attached to the end of the winding shaft, and the bracket And a drive device for rotating the take-up shaft attached to a position shifted from the take-up shaft in the diameter direction of the take-up shaft, and endless traveling for transmitting the driving force of the drive device to the take-up shaft And a winding force transmission means having a chain as a member, and the winding shaft end structure is in a free state that is not fixed at a fixed position, whereby the shutter curtain is wound Even if the winding diameter of the shutter curtain on the winding shaft changes due to the feeding, the winding shaft end structure can freely move up and down to follow the change in the winding diameter.
JP 2003-41867 (FIGS. 2 and 3)

  By the way, if the winding shaft end structure is in a free state that is not fixed at a fixed position as described above, a tensile force is applied to the chain when the shutter curtain is wound and unwound by the winding shaft. By doing so, vertical winding force based on this tensile force is generated in the winding shaft end structure. When the winding shaft end structure is rotated in the vertical direction by this rotational force, there is a risk of hindering smooth winding and unwinding of the shutter curtain by the winding shaft. It is required to devise a shutter device that can prevent rotation in the direction.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a winding shaft end structure of a switchgear that can prevent the vertical rotation of the winding shaft end structure that is in a free state that is not fixed at a fixed position. By the way.

  The winding shaft end structure of the switchgear according to the present invention is supported upward by the winding shaft support means disposed on the lower side, and can be rotated forward and backward to wind and unwind the opening / closing body. A take-up shaft, a bracket attached to the end of the take-up shaft, and attached to the bracket at a position shifted in the diameter direction of the take-up shaft from the take-up shaft, and rotates the take-up shaft A winding shaft end structure that includes a driving device for driving and a driving force transmission means having an endless traveling member for transmitting the driving force of the driving device to the winding shaft. The shutter device in a free state that is not fixed at a position, further comprising a turning force counteracting structure for resisting a vertical turning force generated in the winding shaft end structure. Is.

  The winding shaft end structure of the switchgear according to the present invention includes a turning force counter structure for opposing the vertical turning force generated in the winding shaft end structure. Even when a winding force in the vertical direction based on the tensile force is generated in the winding shaft end structure due to a tensile force acting on the endless traveling member when the body is wound or unwound, the winding shaft end It is possible to prevent the partial structure body from rotating in the vertical direction by the rotational force counteracting structure body, thereby realizing smooth winding and unwinding of the opening / closing body by the winding shaft.

  Here, the tensile force acting on the endless traveling member may be the tensile force acting on the endless traveling member by the rotation of the winding shaft when the opening / closing body is closed and moved downward under its own weight, A tensile force acting on the endless traveling member when the drive device rotates the winding shaft in order to wind up or unwind from the winding shaft may be used.

  The endless running member may be a chain or a belt. That is, the driving force transmitting means may be a chain type or a belt type.

  The take-up shaft support means disposed below the take-up shaft and supporting the take-up shaft upward supports the take-up shaft with a rotating member such as a roller, for example. Alternatively, the winding shaft may be supported by a receiving member that does not rotate with a flat surface or curved surface in contact with the winding shaft, and further, both the rotating member and the non-rotating member. The winding shaft may be supported. The take-up shaft support means may be one in which a member that supports the take-up shaft is arranged at one place in the circumferential direction of the take-up shaft, for example, directly below the take-up shaft. It may be arranged at a plurality of locations.

  Further, the number of winding shaft support means in the length direction of the winding shaft is arbitrary, and may be one or plural, and the length of the winding shaft support means in the length direction of the winding shaft is also Is optional.

  Further, the number of the structure of the turning force counter structure and the number of means constituting the turning force counter structure is arbitrary. For example, the turning force counter structure is extended from the take-up shaft. You may comprise by the at least 2 rotational force countermeasure means arrange | positioned in the diametrical direction of a winding shaft with respect to a position.

  According to this, it is possible to effectively counter the turning force in the vertical direction generated in the winding shaft end structure by at least two turning force countermeasure means.

  In order to more effectively counter the vertical rotational force generated in the winding shaft end structure, one of the two rotational force counter means is provided with one rotational force counter means. What is necessary is just to use it as a means to make upward opposing force act on a winding-shaft end part structure, and to make the other rotational force opposing means act on the winding-shaft end part structure.

  In this way, one of the two turning force counter means is a means for applying an upward counter force to the winding shaft end structure, and the other turning force counter means is the winding shaft end. In the case of a means for applying a downward counter force to the part structure, the position of the rotational force counter means effectively counters the vertical rotational force generated in the winding shaft end structure. In order to be able to do so, it may be determined in relation to the feeding position where the opening / closing body is drawn from the winding shaft.

  That is, when the feeding position is a position between the axis position of the winding shaft and the arrangement position of the driving device, the one that causes an upward counter force to act on the winding shaft end structure Is arranged closer to the drive device arrangement position than the feeding position, and the other turning force countermeasure means for applying a downward counter force to the winding shaft end structure is wound from the feeding position. It is arranged on the axis position side of the spindle.

  In this way, the one turning force counter means for applying an upward counter force to the take-up shaft end structure is arranged closer to the arrangement position of the drive device than the feeding position, and downward to the take-up shaft end structure. In the case where the other turning force countermeasure means for applying the opposing force is arranged closer to the axial position of the take-up shaft than the feeding position, the other turning force countermeasure means is used as the take-up shaft end structure. It is preferable to use a means for allowing the to move in the vertical direction.

  According to this, the opening / closing body is wound and delivered by the winding shaft, whereby the winding diameter of the opening / closing body on the winding shaft changes, and the winding shaft moves up and down with respect to the winding shaft support means. Even so, since the winding shaft end structure can be moved in the vertical direction following the vertical movement, the opening / closing body can be smoothly wound and fed out by the winding shaft as predetermined.

  Further, when the feeding position is at a position opposite to the position where the driving device is disposed with respect to the axis position of the winding shaft, a downward counter force is applied to the winding shaft end structure. The other turning force counter means is arranged closer to the drive device arrangement position than the axis position of the winding shaft, and the one turning force counter force acts on the winding shaft end structure. The means is arranged closer to the axial position of the winding shaft than the arrangement position of the driving device.

  In this way, the other turning force counter means for applying a downward counter force to the winding shaft end structure is arranged closer to the arrangement position of the drive device than the axial center position of the winding shaft, and the winding shaft end In the case where the one rotating force counter means for applying an upward counter force to the substructure is arranged closer to the axial center position of the winding shaft than the arrangement position of the drive device, the one rotating force counter means is The winding shaft end structure is preferably a means for allowing the structure to move in the vertical direction.

  According to this, also in this case, the opening / closing body is wound and unwound by the winding shaft, whereby the winding diameter of the opening / closing body on the winding shaft changes, and the winding shaft supports the winding shaft support means. Even if it moves up and down, the winding shaft end structure can be moved in the vertical direction following the vertical movement. It can be done.

  In addition, when the take-up shaft moves up and down with respect to the take-up shaft support means as described above, the turning power can cause the take-up shaft end structure to move in the vertical direction following the vertical movement. The countermeasure means may be one utilizing an elastic force such as a spring or rubber, or may be one utilizing the weight of a weight member or the like, and the principle of the counter force generation is arbitrary.

  Further, the counter force of one of the two counter-rotating power means described above may be applied to the winding shaft, may be applied to the bracket, the drive device, etc. You may make it act. Further, the counter force of the remaining rotational force counter means may be applied to the winding shaft, may be applied to the bracket, or may be applied to the drive device or the like.

  Further, the above-described end portion of the winding shaft may be directly connected to the main body portion of the winding shaft that winds and unwinds the opening / closing body, or is connected via a misalignment absorbing means such as a universal joint. May be.

  According to the latter, the winding diameter of the opening / closing body at the winding shaft changes due to winding and unwinding of the opening / closing body, and due to this change in winding diameter, the winding shaft moves up and down relative to the winding shaft support means, Even if the winding shaft end structure on which the counteracting force by the above-described rotational force counteracting structure acts on the vertical movement of the winding shaft cannot sufficiently move up and down, the main body of the winding shaft The misalignment occurring between the portion and the bracket to which the end of the winding shaft is attached can be absorbed by the misalignment absorbing means.

  In addition, one of the two turning force countering means has a contact portion that contacts the driving device, whereby the winding shaft end structure is attached to the driving device. The center may be rotatable in the vertical direction.

  According to this, the winding shaft end structure is rotatable in the vertical direction around the drive device with which the abutting portion is in contact, and the remaining of the two rotational force counter means Since it is sufficient that the counter force counter means acts on the winding shaft end structure with a counter force against the vertical rotating force generated in the winding shaft end structure, the at least two torque counters It is possible to simplify the entire structure of the turning force counteracting structure constituted by means.

  The abutting portion may be this member when the one turning force countering means of the two turning force countering means is formed of one member. In the case where the one turning force counter means of the two turning force counter means is formed by a plurality of members, the turning force counter means formed by these members. It may be part of the means itself, one of these members, or part of this one member.

  Further, the present invention described above includes a case where the above-described winding shaft end structure which is in a free state not fixed at a fixed position is provided only at one end of the winding shaft, and When it is provided at both ends of the take-up shaft and when the other end of the take-up shaft not provided with the take-up shaft end structure is in a non-free state fixed at a fixed position And the other end of the winding shaft can also be applied to a case where it is in a free state that is not fixed at a fixed position.

  When the other end of the winding shaft is also in a free state that is not fixed at a fixed position, the winding shaft end structure according to the present invention is the axial direction of the winding shaft. And a winding shaft movement blocking means for preventing the winding shaft from moving in the longitudinal direction of the diameter.

  According to this, even when the winding shaft end structure provided at one end of the winding shaft and the other end of the winding shaft are not fixed in a fixed position, The take-up shaft movement preventing means prevents the take-up shaft and the drive device attached to the take-up shaft through the bracket from moving in the axial direction of the take-up shaft and the diameter front-rear direction of the take-up shaft. Even if an unscheduled external force is applied to the take-up shaft or the driving device, the take-up shaft can be maintained at a predetermined position supported upward by the take-up shaft support means.

  In the present invention described above, the take-up shaft is supported upward by the take-up shaft support means disposed below the take-up shaft. However, the present invention is not limited to this, but can be applied to a small span. The present invention can also be applied to the opening / closing device of the above.

  Further, the present invention can be applied to any open / close device, that is, the open / close device to which the present invention is applied may be a shutter device in which the open / close body is a shutter curtain, and the open / close body is a smoke-proof hanging curtain. An anti-smoke banner device may be used, or a roll screen device having an opening / closing body as a screen may be used.

  Further, when the present invention is applied to a shutter device, the shutter device may be a shutter device for any purpose, and the shutter device is used for forming a disaster prevention section with a shutter curtain fed out from a winding shaft. It may be a shutter device for disaster prevention (including one for elevators), an opening shutter device that opens and closes openings such as doorways and windows with a shutter curtain, and may also be a shutter device for a garage, or a shutter device for storage. Alternatively, a vehicle-mounted shutter device mounted on a loading platform of a vehicle such as a truck may be used.

Furthermore, when the present invention is applied to a shutter device, the shutter device is a shutter device including the driving device for rotating the winding shaft. The present invention can be applied not only to a driving device but also to a shutter device having both automatic and manual functions that can be performed manually. Further, the present invention can be applied when the driving device winds a shutter curtain around a winding shaft. The rotation of the take-up shaft, which is used to rotate the take-up shaft and feeds out the shutter curtain, can also be applied to a shutter device or the like that uses the weight of the shutter curtain or the weight of the weight member.
In the present invention, the structure and type of the winding shaft are arbitrary. That is, the take-up shaft may be formed by connecting one shaft or a plurality of shafts in series, and for winding and feeding the shutter curtain around the outer periphery of the fixed shaft arranged at the center. The rotating member may be rotatably arranged. In the latter case, the rotating member includes a plurality of wheels rotatably fitted on the outer periphery of the fixed shaft and a bar-shaped connection that connects these wheels spaced apart in the axial direction of the fixed shaft. It may be formed including a member, or may be formed including these wheels and a pipe-shaped member that is fixedly fitted to the outer periphery of these wheels to couple the wheels together.

  The shutter curtain may be formed entirely or substantially entirely by slats, may be formed by a panel, may be formed by a sheet, or may be formed by a pipe connected by a link. It may be formed of a net, or may be a composite of a plurality of different types of members, for example, a composite of a plurality of these, such as a slat and a sheet.

  According to the present invention, even if the winding shaft end structure is in a free state where the winding shaft end structure is not fixed at a fixed position, the winding shaft end structure can be prevented from rotating in the vertical direction. can get.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated based on drawing. FIG. 1 is a front view showing the entirety of a shutter device that is an opening / closing device to which a winding shaft end structure according to an embodiment of the present invention is applied, and this shutter in which the opening / closing body is a shutter curtain. The apparatus has a fire prevention and smoke prevention zone in the indoor space 2 by a shutter curtain 11 that is fed out from a winding shaft 10 that is horizontally arranged in a ceiling space 3 that is partitioned from the indoor space 2 by a ceiling member 1. It is a shutter device for disaster prevention.

  As shown in FIG. 2, which is a cross-sectional view taken along line S <b> 2-S <b> 2 of FIG. 1, the shutter curtain 11 whose upper end is coupled to the winding shaft 10 and wound around the winding shaft 10 is attached to the ceiling member 1. The ceiling space 3 reaches the indoor space 2 through a slit formed in the lintel member 4 provided, and the building housing 5 such as a wall or a pillar in the indoor space 2 shown in FIG. Since the left and right ends, which are both ends in the width direction of the shutter curtain 11, are slidably inserted into the attached guide rail 6, while being guided by these guide rails 6, the shutter curtain 11 is arranged on the winding shaft 10. It opens and closes up and down by winding and unwinding by forward and reverse rotation. The shutter curtain 11 is entirely or substantially entirely formed of a fireproof sheet coated with and / or impregnated with a fireproof paint, except for the metal seat plate 11A. The shutter curtain 11 is fully closed to form the disaster prevention section by landing on the floor 2A, and when the seat plate 11A reaches the lintel member 4 as the shutter curtain 11 rises, the shutter curtain 11 Fully open.

  As shown in FIG. 2, an L-shaped support member 31 is attached to the building housing 7 existing in the ceiling space 3, and as shown in FIG. A plurality of base members 32 are provided in the length direction of the shaft 10, and a base member 32 having a substantially full length of the winding shaft 10 is installed and fixed between the horizontal portions 31 </ b> A shown in FIG. 2 of these support members 31. On the base member 32, a winding shaft support means 33 is disposed below the winding shaft 10 and supports the winding shaft 10 upward. The take-up shaft support means 33 according to this embodiment includes two rollers 34 that are rotating members, and a roller holding member 35 that rotatably holds these rollers 34, and the two rollers 34. Is in contact with the shutter curtain 11 wound around the take-up shaft 10 from the lower side at two locations away from the take-up shaft 10 in the circumferential direction. 10 is a means for supporting the winding shaft 10 at two locations in the circumferential direction of the winding shaft 10 (or at two locations separated in the diameter horizontal direction or substantially the diameter horizontal direction of the winding shaft 2).

  A plurality of such winding shaft support means 33 are provided in the length direction of the winding shaft 10 as shown in FIG.

  Further, from the main body portion of the winding shaft 10 for winding and unwinding the shutter curtain 11, a right end portion 10A in FIG. 1 which is one end portion of the winding shaft 10 protrudes. The portion 10A is rotatably inserted into and attached to the bracket 37 shown in FIG. 3, which is a sectional view taken along the line S3-S3 of FIG. 1, and thus the bracket of the end portion 10A attached to the bracket 37. A large-diameter sprocket wheel 38 is fixed to the shaft end protruding from 37. In the present embodiment, the end portion 10A is directly connected to the main body portion of the winding shaft 10.

  The bracket 37 is attached with an opening / closing device 40 as a driving device for rotating the winding shaft 10 at a position away from the winding shaft 10 in the diameter direction of the winding shaft 10. The drive shaft 40A of the opening / closing machine 40 disposed on the same side as the take-up shaft 10 passes through the bracket 37, and a small-diameter sprocket wheel 41 is provided at the shaft end protruding through the bracket 37 of the drive shaft 40A. Is fixed, and a chain 42, which is an endless traveling member, is bridged between the small-diameter sprocket wheel 41 and the large-diameter sprocket wheel 38. The small-diameter sprocket wheel 41, the large-diameter sprocket wheel 38, and the chain 42 are used to transmit the rotational driving force from the driving shaft 40A of the opening / closing device 40, which is a combination of an electric motor and a brake, to the winding shaft 10. A transmission means is configured.

  And it has the winding shaft 10, the bracket 37 attached to the end part 10A of this winding shaft 10, the opening / closing machine 40 attached to this bracket 37, and the chain 42 which is an endless traveling member. The above-described driving force transmitting means constitutes the winding shaft end structure 50 on the end portion 10A side, which is one end portion of the winding shaft 10. In the winding shaft end structure 50, the bracket 37 to which the winding shaft 10 and the switch 40 are attached is not coupled to the building housing 7 existing in the ceiling space 3 and is fixed at a fixed position. Therefore, it is in a free state that is not fixed at a fixed position.

  When the take-up shaft end structure 50 is in a free state that is not fixed at a fixed position as described above, the take-up shaft end structure 50 receives a rotational force in the vertical direction as will be described later. Therefore, the shutter device for disaster prevention according to this embodiment is provided with a turning force counteracting structure 60 for resisting this turning force and suppressing the vertical rotation of the winding shaft end structure 50. ing. The structure of the turning force counterstructure 60 is configured as follows.

  As shown in FIG. 3, the building housing 7 has a U-shaped support having upper and lower arms 43 </ b> A and 43 </ b> B extending forward from the building housing 7 toward the winding shaft 10. As shown in FIG. 1, two members 43 are coupled in the length direction of the winding shaft 10 at positions corresponding to the positions where the winding shaft end structure 50 is disposed. As shown in FIG. 3, a base member 44 is installed and fixed between the lower arm portions 43B of these support members 43, and a top member 45 is installed and fixed between the upper arm portions 43A. .

  The base member 44 forms a support 46A and an abutting portion that is attached to the upper end of the support 46A and is in contact with the lower surface of the switch 40, so that the switch 40 can be received from below. A receiving structure 46 having a receiving member 46B, which is also a member, is disposed, and the receiving member 46B receives the opening / closing device 40 so as to be rotatable about a drive shaft 40A of the opening / closing device 40. . Further, on the upper surface of the bracket 37, a spring receiving member 47A is attached at a position directly above the end 10A of the winding shaft 10 penetrating the bracket 37 or on the right side in FIG. At the same time, a spring receiving member 47B is attached to the lower surface of the top member 45 at a position facing the spring receiving member 47A in the vertical direction, and a compression coil spring 47C which is an elastic member is provided between the spring receiving members 47A and 47B. The spring structure 47 is constituted by the spring receiving members 47A and 47B and the compression coil spring 47C.

  The receiving structure 46 and the spring structure 47 constitute the above-described turning force counterstructure 60 according to this embodiment.

  The left end 10B of the winding shaft 10 shown in FIG. 1 is not provided with a bracket fixed to a fixed position, for example, by being connected to the building housing 7, so that this end 10B is also in a free state that is not fixed at a fixed position, like the winding shaft end structure 50 described above. Thus, the winding shaft end structure 50 provided at one end 10A of the winding shaft 10 and the other end 10B of the winding shaft not provided with the bracket are fixed at a fixed position. Even if the winding shaft 10 is in a free state, the shutter is dropped from a predetermined position where the winding shaft 10 is supported upward by the above-described winding shaft support means 33, or the winding shaft 10 moves in the axial direction to release the shutter. In order to prevent the position of the end portion in the width direction of the curtain 11 from deviating from the position of the left and right guide rails 6, the shutter shaft for disaster prevention according to this embodiment includes the winding shaft 10. Winding shaft movement blocking means 20 shown in FIG. 1 is provided for preventing the shaft and the winding shaft 10 from greatly moving in the longitudinal direction of the diameter beyond the predetermined value. The take-up shaft movement preventing means 20 includes first to fifth stopper members 21 to 25 shown in FIGS. 1 and 2.

  The first stopper member 21 disposed on one end 10A side of the winding shaft 10 shown in FIG. 1 is installed between the horizontal portions 31A of the plurality of support members 31 described above, as shown in FIG. The first stopper member 21 is erected on the fixed base member 32, and the disk member 26 coupled to the end portion 10 </ b> A of the winding shaft 10 and the main body of the winding shaft 10 from the opposite side. Opposite (see also FIG. 1). A second stopper member 22 disposed on the other end 10B side of the winding shaft 10 shown in FIG. 1 is also erected on the base member 32, and the second stopper member 22 is The end surface of the end portion 10B of the winding shaft 10 faces the main body of the winding shaft 10 from the opposite side. For this reason, even if an unscheduled external force having a component in the axial direction of the take-up shaft 10 is applied to the take-up shaft 10 or the like, the take-up shaft 10 is made to be wound by the stopper members 21 and 22. It is prevented from moving in the axial direction over a predetermined value.

  The third and fourth stopper members 23 and 24 shown in FIG. 1 are also erected on the base member 32, and these stopper members 23 and 24 are shown in FIG. As can be seen, it is arranged on the rear side of both ends 10A, 10B of the winding shaft 10, that is, between the winding shaft 10 and the building housing 7. A plurality of fifth stopper members 25 shown in FIG. 1 are arranged in the axial direction of the take-up shaft 10, and the fifth stopper members 25 are located forward of the building housing 7 as shown in FIG. It is L-shaped and includes a front extending portion 25A that extends to the bottom and a lower extending portion 25B that extends downward from the lower end of the front extending portion 25A and faces the winding shaft 10 on the side opposite to the building housing 7. The roller 27 facing the shutter curtain 11 wound around the winding shaft 10 in the front-rear direction is rotatably attached to the downward extending portion 25B.

  For this reason, even if an unscheduled external force having a component in the longitudinal direction of the diameter of the winding shaft 10 acts on the winding shaft 10 or the like, the third and fourth stopper members 23 and 24 and the fifth stopper member 25 The roller 27 prevents the take-up shaft 10 from moving greatly in the front-rear direction of the diameter of the take-up shaft 10, so that the take-up shaft 10 is separated from the two rollers 34 of the take-up shaft support means 33. It is prevented from falling.

  It should be noted that the roller 27 of the fifth stopper member 25 does not interfere with the shutter curtain 11 even when the winding diameter of the shutter curtain 11 wound around the winding shaft 10 is maximum. The member that contacts the shutter curtain 11 is a rotatable roller 27 even if the take-up shaft 10 moves forward due to the above-mentioned unscheduled external force. Therefore, damage to the shutter curtain 11 can be prevented.

  The disaster prevention shutter device described above is for a large span in which the take-up shaft 10 has a long dimension, but the take-up shaft 10 may be bent downward due to its own weight or the weight of the shutter curtain 11. This is prevented by the take-up shaft support means 33.

  The shutter curtain 11 of the shutter device for disaster prevention at the normal time is in a fully open state in which the seat plate 11A shown in FIG. 1 reaches the position of the lintel member 4. At this time, since the above-described brake of the opening / closing machine 40 is on, the winding shaft 10 is not allowed to rotate. Thus, when the winding shaft 10 is non-rotating and the shutter curtain 11 is fully open, a fire occurs, and a signal from the sensor that detects this fire controls the switch 40. The brake of the opening / closing device 40 is turned off by inputting to the device or when a worker operates a manual operation member (not shown) at the time of periodic inspection of the shutter device for disaster prevention. As a result, the braking force that has stopped the rotation of the winding shaft 10 disappears, so that the winding shaft 10 rotates by the weight of the shutter curtain 11 including the weight of the seat plate 11A, and the shutter curtain 11 rotates. The shutter curtain 11 is fully closed by being drawn downward from the front.

  Further, by operating a switch device (not shown), the drive shaft 40A of the electric motor of the switch 40 is rotationally driven, whereby the driving force by the small-diameter sprocket wheel 41, the large-diameter sprocket wheel 38, and the chain 42 described above. The take-up shaft 10 rotates in the opposite direction to the time when the shutter curtain 11 is extended through the transmission means, and the shutter curtain 11 is taken up by the take-up shaft 10 and lifts, and the shutter curtain 11 is in the fully open position. When reaching, the electric motor is stopped by a signal from a detection means (not shown) that detects the fully opened position, and the brake is turned on. As a result, the shutter curtain 11 stops at the fully open position.

  As described above, when the shutter curtain 11 is wound around the winding shaft 10 and is taken out from the winding shaft 10, the winding diameter of the shutter curtain 11 on the winding shaft 10 changes. The winding shaft end structure 50 provided at one end 10A of the winding shaft 10 supported upward by the winding shaft support means 33 and the other end 10B of the winding shaft are: Since the winding shaft 10 is in a free state that is not fixed at a fixed position, the winding shaft 10 moves up and down following the change in the winding diameter of the shutter curtain 11 with respect to the winding shaft support means 33. Therefore, the winding and unwinding of the shutter curtain 11 by the winding shaft 10 are performed smoothly.

  Even when the shutter curtain 11 is wound or unwound by the winding shaft 10, even if an unforeseen external force acts on the winding shaft 10 or the like, the winding shaft movement blocking means 20 described above causes the winding shaft 10. Is prevented from moving more than a predetermined value in the axial direction of the winding shaft 10 and in the longitudinal direction of the diameter of the winding shaft 10, and the winding shaft 10 is maintained at a predetermined position.

  In the above, as shown in FIG. 3, in the present embodiment, in the horizontal direction of the diameter of the winding shaft 10, the feeding position A where the shutter curtain 11 is fed from the winding shaft 10 is the axis of the winding shaft 10. It is a position between the lead position B and the arrangement position C of the switch 40. Therefore, as described above, when the shutter curtain 11 that has been fully opened is drawn downward by its own weight including the weight of the seat plate 11A from the fully opened position, the shutter curtain 11 rotates counterclockwise in FIG. 3 to perform this drawing. The take-up shaft 10 and the large-diameter sprocket wheel 38 cause a tensile force E to act on the lower step portion 42A of the chain 42. Due to this tensile force E, the bracket 37 has the take-up shaft support means 33. Specifically, the turning force D in the vertical direction centered on the winding shaft 10 supported in FIG. 3 is generated in the left direction in FIG. The take-up shaft end structure 50 tends to rotate in the vertical direction around the take-up shaft 10, specifically, in the left direction in FIG. 3.

  Even if the shutter device for disaster prevention according to the present embodiment includes the winding shaft end structure 50 configured to include the bracket 37 in which the rotational force D is generated, the shutter for disaster prevention is provided. The apparatus includes a turning force counterstructure 60 constituted by the receiving structure 46 and the spring structure 47 described above, and the receiver disposed on the position C of the opening / closing device 40 relative to the feeding position A. The structure 46 serves as a rotative power counter means for applying an upward counter force for countering the rotatory power D to the winding shaft end structure 50, specifically, to the opening / closing device 40. The spring structure 47 disposed on the axis position B side of the take-up shaft 10 faces the take-up shaft end structure 50, specifically, the bracket 37, and faces the downward force to counter the rotational force D. It becomes a countermeasure against rotational force that applies force.

  Therefore, the vertical rotation of the winding shaft end structure 50 by the rotational force D is suppressed by the receiving structure 46 and the spring structure 47, and thereby the winding shaft The unwinding by the dead weight of the shutter curtain 11 from 10 is performed smoothly.

  Then, when the shutter curtain 11 reaches the fully closed position, in other words, the extension length of the shutter curtain 11 from the winding shaft 10 is the maximum, and the shutter curtain weight corresponding to this extension length Even if a large rotational force in the same direction as the rotational force D is generated in the winding shaft end structure 50 around the winding shaft 10 supported by the winding shaft support means 33, the winding shaft end is caused by this rotational force. The rotation of the partial structure 50 in the left direction in FIG. 3 is also suppressed by the rotational force counteracting structure 60 including the receiving structure 46 and the spring structure 47.

  Further, the winding diameter of the shutter curtain 11 on the winding shaft 10 changes due to the winding and unwinding of the shutter curtain 11, and the winding shaft 10 around which the shutter curtain 11 is wound is wound by the change in the winding diameter. Although it moves up and down with respect to the shaft support means 33, the winding shaft end structure 50 including the bracket 37 to which the end portion 10 A of the winding shaft 10 is attached has a spring structure 47. A downward counter force acts, and this counter force is due to the spring elastic force of the spring structure 47. The spring structure 47 is the winding shaft end on which the counter force by the spring structure 47 acts. Since this is a counteracting means for allowing the vertical movement of the part structure 50, the winding diameter of the shutter curtain 11 on the winding shaft 10 changes, whereby the winding shaft 10 becomes the winding shaft. Support means 3, the winding shaft end structure 50 can be freely rotated in the vertical direction around the opening / closing device 40 received by the receiving structure 46. The winding and unwinding of the shutter curtain 11 in which the winding diameter of the shutter curtain 11 on the take-up shaft 10 changes can be smoothly performed as predetermined by the take-up shaft 10.

  4 to 7 are rotational force countermeasure means for applying a downward opposing force to the winding shaft end structure 50 in order to counter the rotational force D of the rotational force counterstructure 60. Each alternative embodiment of the spring structure 47 is shown.

  4 instead of the spring structure 47, the upper surface of the shutter curtain 11 wound around the winding shaft 10 near the end 10A of the winding shaft 10 is pressed downward by the elastic force of the spring. It becomes the spring structure 70 which does. The spring structure 70 is disposed on the lower surface of a support member 71 that extends forward from the building housing 7 to the top of the take-up shaft 10, and is disposed below the spring support member 70A. A spring receiving member 70B connected to the spring receiving member 70A via 70C, and two rollers 70E rotatably attached to the spring receiving member 70B via a holding member 70D. Yes. Two rollers 70E arranged in the circumferential direction of the take-up shaft 10 due to the compression elastic force of the compression coil spring 70C cause the take-up shaft 10 that is a constituent member of the take-up shaft end structure 50 to rotate. It is pressed downward via the shutter curtain 11 wound around the take-up shaft 10, so that a downward counter-force for countering the rotational force D is a constituent member of the take-up shaft end structure 50. Is acting on the winding shaft 10.

  In the spring structure 70 in this embodiment as well, the part of the winding shaft end structure 50 on which the counter force by the spring structure 70 is applied, specifically, the shutter curtain 11 is wound. Change of the winding diameter of the shutter curtain 11 on the take-up shaft 10 because the portion near the end portion 10A of the main body portion of the take-up shaft 10 is a rotational force counter means that allows the portion to move in the vertical direction. Even if the take-up shaft 10 moves up and down with respect to the take-up shaft support means 33, the take-up shaft end structure 50 can freely move up and down around the opening / closing device 40 received by the receiving structure 46. Accordingly, the shutter curtain 11 can be smoothly wound and fed out by the winding shaft 10 in a predetermined manner.

  5 instead of the spring structure 47, the bracket 37, which is a constituent member of the winding shaft end structure 50, is attached to the bracket 37 as shown in FIG. The spring hook member 80A attached at the right position, the spring hook member 80B attached to the base member 82 of the horizontal portion 81A of the support member 81 coupled to the building housing 7, and both ends of these spring hook members 80A, 80B A spring structure 80 is formed by the tension coil spring 80C that is hung. The L-shaped support member 81 in this embodiment replaces the support member 43 in the embodiment of FIGS. 1 and 3, and two of these support members 81 provided in the axial direction of the winding shaft 10. The base member 82 is erected and fixed between the horizontal portions 81A, and the other base member 83 erected and fixed between the horizontal portions 81A is also used in the receiving structure shown in FIGS. A body 46 is arranged.

  In the embodiment of FIG. 5, a downward opposing force against the rotational force D acts on the bracket 37 by the tensile elastic force of the tension coil spring 80 </ b> C of the spring structure 80.

  The spring structure 80 in this embodiment is also a rotational force countermeasure means that allows the vertical movement of the portion of the take-up shaft end structure 50 composed of the bracket 37 and the like on which the counter force by the spring structure 80 acts. Therefore, even if the winding diameter of the shutter curtain 11 on the winding shaft 10 changes and the winding shaft 10 moves up and down with respect to the winding shaft support means 33 due to the change in the winding diameter, The winding shaft end structure 50 can freely rotate in the vertical direction around the opening / closing device 40 received by the receiving structure 46, thereby winding the shutter curtain 11 and winding it. The shaft 10 can be smoothly performed as specified.

  6 instead of the spring structure 47 is a weight member attached to the upper surface of the bracket 37 at a position directly above the end portion 10A of the winding shaft 10 or on the right side of FIG. 90. Due to the weight of the weight member 90, a downward opposing force against the rotational force D acts on the bracket 37.

  The spring weight member 90 in this embodiment is also a rotational force countermeasure means that allows the vertical movement of the portion of the winding shaft end structure 50 composed of the bracket 37 and the like on which the counter force by the weight member 90 acts. For this reason, even if the winding diameter of the shutter curtain 11 on the winding shaft 10 changes and the winding shaft 10 moves up and down with respect to the winding shaft support means 33 due to the change in the winding diameter. The winding shaft end structure 50 can freely rotate in the vertical direction around the opening / closing device 40 received by the receiving structure 46, whereby the winding of the shutter curtain 11 by the winding shaft 10. Can be taken out smoothly as specified.

  7 instead of the spring structure 47 is also a weight structure 100 that generates a downward counter force against the rotational force D by the weight of the weight member. The weight structure 100 is fitted into a ring member 101 with a groove 101A attached to an end 10A of the winding shaft 10 protruding from the large-diameter sprocket wheel 38, and a groove 101A of the ring member 101. A bar member 103 suspended from the loop-shaped wire member 102; a receiving member 104 attached horizontally or substantially horizontally to the lower end of the bar member 103; and a weight member 105 mounted on the receiving member 104. The weight member 105 is formed with a notch 105A into which the bar member 103 is inserted.

  In this embodiment, the weight of the weight member 105 allows a downward countering force that opposes the rotational force D to act on the winding shaft 10, and an arbitrary number of weight members 105 are stacked on the receiving member 104. Therefore, the magnitude of the downward opposing force acting on the winding shaft 10 can be appropriately set by selecting the number of weight members 105 to be stacked.

  In the spring weight structure 100 in this embodiment, the portion of the take-up shaft end structure 50 to which the counter force by the weight member 105 is applied is specifically the end 10A of the take-up shaft 10. Is a counteracting means for allowing the power to move in the vertical direction. For this reason, the winding diameter of the shutter curtain 11 on the winding shaft 10 changes, and the winding shaft 10 changes due to the change in the winding diameter. Even if the winding shaft support means 33 moves up and down, the winding shaft end structure 50 can freely rotate in the vertical direction around the opening / closing device 40 received by the receiving structure 46. Thus, the shutter curtain 11 can be wound and fed out by the winding shaft 10 as predetermined.

  FIG. 8 shows a positional relationship between the feeding position A where the shutter curtain 11 is drawn from the winding shaft 10, the axial position B of the winding shaft 10, and the arrangement position C of the switch 40. Are different embodiments. That is, in this embodiment, the feeding position A is a position opposite to the position C of the opening / closing device 40 with respect to the axial position B of the winding shaft 10. In this embodiment, a U-shaped support member 91 is used instead of the support member 43 in the embodiment of FIGS. 1 and 3. A top member 92 is installed and fixed between the upper arm portions 91A of the two support members 91 provided in the axial direction of the winding shaft 10, and a base member 93 is installed between the lower arm portions 91B. It is fixed.

  As described above, in this embodiment, the feeding position A is a position opposite to the position C of the opening / closing device 40 with respect to the axial position B of the winding shaft 10, so that it is in a fully opened state. When the shutter curtain 11 is drawn downward from the feeding position A by its own weight including the weight of the seat plate 11A from the fully opened position, the winding shaft 10 and the large-diameter sprocket wheel that rotate clockwise in FIG. 8 to perform this feeding. 38, a tensile force G acts on the upper stage portion 42B of the chain 42. Due to the tensile force G, the bracket 37 constituting the winding shaft end structure 50 is attached to the winding shaft. The vertical turning force F about the winding shaft 10 supported by the support means 33, specifically, the right turning force F in FIG. 8 is generated.

  The rotating force opposing structure 60 according to the present embodiment for countering the rotating force F is a receiving member that serves as two rotating force counters arranged in the longitudinal direction of the diameter of the winding shaft 10. The structure 110 and the spring structure 120 are included. The receiving structure 110, which is disposed on the position C side of the opening / closing device 40 with respect to the axial position B of the winding shaft 10 and disposed immediately above or substantially above the opening / closing device 40, includes the top member 92. The support 110 </ b> A that is suspended and fixed to the lower end of the support 110 </ b> A, and a receiving member 110 </ b> B that is a member that is in contact with the upper surface of the switch 40 and that also receives the switch 40 from above. The receiving member 110 </ b> B receives the opening / closing device 40 so as to be rotatable about a drive shaft 40 </ b> A of the opening / closing device 40. Moreover, it arrange | positions in the axial center position B side of the winding shaft 10 rather than the arrangement position C of the switch 40, and is arrange | positioned in the position of the right side of FIG. The spring structure 120 is interposed between a spring receiving member 120A attached to the lower surface of the bracket 37, a spring receiving member 120B attached to the upper surface of the base member 93, and the spring receiving members 120A and 120B. And a compression coil spring 120C.

  In this embodiment, the receiving structure 110 applies a downward counter force to the switch 40 with respect to the rotational force F, and the spring structure 120 is directed upward to the bracket 37 by the compression elastic force of the compression coil spring 120C. A counter force is applied, and thereby the vertical rotation of the winding shaft end structure 50 constituted by the winding shaft 10, the bracket 37, the opening / closing device 40, and the like is suppressed.

  Further, the spring structure 120 of this embodiment has a rotational force that allows the vertical movement of the portion of the take-up shaft end structure 50 including the bracket 37 and the like on which the counter force by the spring structure 120 acts. Therefore, the winding diameter of the shutter curtain 11 on the winding shaft 10 changes, and the winding shaft 10 moves up and down relative to the winding shaft support means 33 due to the change in the winding diameter. Even so, the winding shaft end structure 50 can freely rotate in the vertical direction around the opening / closing device 40 whose upper surface is in contact with the receiving member 110B of the receiving structure 110. The shutter curtain 11 can be wound and unwound by the shaft 10 as predetermined.

  FIG. 9 shows a spring that is a counteracting means for applying an upward counterforce to the winding shaft end structure 50 in order to counteract the counterrotating force F in the counterrotating structure 60 of FIG. An alternative embodiment to the structure 120 is shown.

  In this embodiment, instead of the top member 92 shown in FIG. 8, a top member 94 having a large width in the longitudinal direction of the diameter of the winding shaft 10 is used, and the receiving structure 110 is disposed on the top member 94. ing. A spring structure 130 instead of the spring structure 120 of FIG. 8 is attached to the lower surface of the top member 94 at a position directly above the end 10A of the winding shaft 10 or on the right side of FIG. A spring hanging member 130A, a spring hanging member 130B attached to the upper surface of the bracket 37 just below the spring hanging member 130A, and a tension coil spring 130C having both ends hung on these spring hanging members 130A and 130B. Yes.

  For this reason, in the embodiment of FIG. 9, an upward opposing force against the rotational force F acts on the bracket 37 by the tensile elastic force of the tension coil spring 130 </ b> C.

  Further, the spring structure 130 of this embodiment also has a rotational force that allows the vertical movement of the portion of the take-up shaft end structure 50 including the bracket 37 and the like on which the counter force by the spring structure 130 acts. Since it is a counter means, the winding diameter of the shutter curtain 11 on the winding shaft 10 changes, and the winding shaft 10 moves up and down relative to the winding shaft support means 33 due to this change in winding diameter. In addition, the winding shaft end structure 50 can freely rotate in the vertical direction around the opening / closing device 40 as in the embodiment of FIG. 8, and therefore the winding of the shutter curtain 11 by the winding shaft 10. Can be taken out as required.

  In the embodiment of FIGS. 8 and 9, the winding shaft end structure 50 in the normal state where the shutter curtain 11 is not unwound due to its own weight has a winding shaft due to the weight of the switch 40 and the like. 9 and FIG. 9 centering on the winding shaft 10 supported by the support means 33 is acting, but the seat plate 11A described above reaches the position of the lintel 4. Even when the shutter curtain 11 is fully opened, at least the weight of the shutter curtain 11 due to the weight of the seat plate 11A acts on the winding shaft end structure 50, and the weight of the shutter curtain 11 due to the weight of the seat plate 11A. Is acting in a direction to counteract the turning force acting on the take-up shaft end structure 50 due to the weight of the opening / closing device 40 or the like, so that a counter force for facing the turning force F is applied to the take-up shaft end portion. Structure 50 Even if the rotational force countermeasure means to act is the receiving structure 110 and the spring structures 110 and 120 described above, the winding shaft end structure 50 is centered on the winding shaft 10 in the left direction in FIGS. There is no turning to.

  In each of the embodiments described so far, one end portion 10A of the winding shaft 10 attached to the bracket 37 and the main body portion of the winding shaft 10 where the shutter curtain 11 is wound and fed are directly connected. FIG. 10 shows a structure in which this one end portion 10A and the main body portion of the winding shaft 10 are connected via a universal joint 36 serving as a misalignment absorbing means. The embodiment which becomes is shown.

  According to this embodiment, it is universal that the main body portion of the take-up shaft 10 and the take-up shaft end structure 50 including the bracket 37 to which the end portion 10A of the take-up shaft 10 is attached are in a misaligned state. Since it is allowed by the joint 36, when the winding shaft 10 moves up and down with respect to the winding shaft support means 33 due to the change in the winding diameter of the shutter curtain 11, the vertical force is counteracted by the rotational force counter structure. Even if the take-up shaft end structure 50 receiving the rotation of the take-up shaft end structure 50 cannot sufficiently rotate in the vertical direction due to the counteracting force of the turning force counter structure, the main body portion of the take-up shaft 10 and the take-up shaft 10 The universal joint 36 can absorb the misalignment that occurs with the bracket 37 to which the end portion 10A is attached.

  In other words, according to the embodiment of FIG. 10, the respective rotational powers constituting the rotational power counter structure for applying the counter force against the above-described rotational power D and the rotational power F to the winding shaft end structure 50. The countermeasure means may be the same as the rotational force countermeasure means 46, 47, 70, 80, 90, 100, 110, 120, 130 of the above-described embodiment, and these rotational force countermeasure means 46, 47, 70, The structure may be simpler than 80, 90, 100, 110, 120, and 130. For this reason, the structure of the turning force countermeasure means is simplified, that is, the structure of the turning force countermeasure structure is simplified. Can be achieved.

  In the present invention, a winding shaft that winds up and opens a shutter curtain or other open / closed body is supported upward by the winding shaft support means, and the winding shaft end structure provided at the end of the winding shaft is constant. The present invention can be used for an opening / closing device such as a shutter device in a free state that is not fixed in position.

It is a front view which shows the whole shutter device for disaster prevention used as the switchgear which has the winding-shaft end part structure which concerns on one Embodiment of this invention. It is the S2-S2 sectional view taken on the line of FIG. It is the S3-S3 sectional view taken on the line of FIG. FIG. 4 is a view similar to FIG. 2 showing a first alternative embodiment of the turning force countermeasure means instead of the spring structure shown in FIG. 3. It is a figure similar to FIG. 3 which shows 2nd another embodiment of the rotational force countermeasure means instead of the spring structure shown by FIG. It is a figure similar to FIG. 3 which shows 3rd another embodiment of the rotational force countermeasure means instead of the spring structure shown by FIG. FIG. 6 is a view similar to FIG. 3 showing a fourth alternative embodiment of the turning force countermeasure means instead of the spring structure shown in FIG. 3. The same as FIG. 3 showing another embodiment of the positional relationship between the feeding position where the shutter curtain as the opening / closing body is drawn from the winding shaft, the axial center position of the winding shaft, and the arrangement position of the opening / closing device as the driving device. FIG. FIG. 9 is a view similar to FIG. 3 showing another embodiment of the turning force countermeasure means instead of the spring structure shown in FIG. 8. It is a figure similar to FIG. 1 which shows another embodiment which connected the edge part of the winding shaft provided with the winding shaft structure with the main-body part of the winding shaft via the misalignment absorption means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Winding shaft 10A, 10B End part of winding shaft 11 Shutter curtain which is opening and closing body 20 Winding shaft movement prevention means 33 Winding shaft support means 36 Universal joint which is misalignment absorbing means 37 Bracket 40 Opening and closing which is driving device Machine 42 Chain which is an endless traveling member 46 Receiving structure which is a rotational force counter means for upward counter force 47 Spring structure which is a rotational force counter means for downward counter force 50 Winding shaft End structure 60 Twist power counter structure 70 Spring structure serving as a rotational force counter means for downward counter force 80 Spring structure serving as a rotational force counter means for downward counter force 90 Downward WEIGHT MEMBER AS A TURNING COUNTER FOR A COUNTER FORCE DESCRIPTION OF SYMBOLS 110 Receiving structure used as counter-rotating force for downward counter force 120 Spring structure serving as counter-rotating force for upward counter force 130 Torque counter means for upward counter force A spring structure A A delivery position where the shutter curtain is drawn out from the take-up shaft B Axial position of the take-up shaft C Placement position of the switch

Claims (16)

A take-up shaft that is supported upward by a take-up shaft support means arranged on the lower side and can be rotated forward and backward to wind and unwind the open / close body, and attached to the end of the take-up shaft Bracket, a bracket attached to the bracket at a position shifted from the winding shaft in the diameter direction of the winding shaft, and a driving device for rotating the winding shaft, and a driving force of the driving device for the winding force. A driving force transmission means having an endless traveling member for transmitting to the take-up shaft, and the take-up shaft end structure that is configured to include a free state that is not fixed at a fixed position ;
In the winding shaft end portion structure of the opening / closing device in which a tensile force acts on one of the upper stage portion and the lower step portion of the endless traveling member when the opening / closing body is drawn downward from the winding shaft,
A counter-rotating structure for counteracting the vertical rotating force generated in the winding shaft end structure by the tensile force ;
The turning force counterstructure is configured by at least one turning force counter means arranged to be shifted in a diameter direction of the winding shaft with respect to a feeding position where the opening / closing body is drawn from the winding shaft,
The one turning force counter means supports the take-up shaft structure so as to be rotatable in the vertical direction around a portion corresponding to the drive unit in the take-up shaft end structure. The winding shaft end structure of the switchgear characterized by the above. The winding shaft end structure of the switchgear according to claim 1, wherein the rotating force opposing structure body is both in a diametrical direction of the winding shaft with respect to a feeding position where the switching body is drawn from the winding shaft. winding shaft end structure of the switchgear, characterized in that it is constituted by two pivoting force countermeasures that are arranged offset.   3. The winding shaft end structure of the switchgear according to claim 2, wherein one of the two turning force counter means exerts an upward counter force on the winding shaft end structure. The winding shaft end structure of the switchgear, wherein the other rotating force counter means is means for applying a downward counter force to the winding shaft end structure. The winding shaft end structure of the switchgear according to claim 3, wherein the one turning force counter means for applying an upward counter force to the winding shaft end structure is the winding shaft end structure. Of the opening / closing device, the winding shaft structure is supported by the one turning force counter means so as to be pivotable in the vertical direction around a portion corresponding to the driving device. Winding shaft end structure. 4. The winding shaft end structure of the switchgear according to claim 3, wherein the other turning force counter means for applying a downward counter force to the winding shaft end structure is the winding shaft end structure. Of the opening / closing device, the winding shaft structure is supported by the one turning force counter means so as to be pivotable in the vertical direction around a portion corresponding to the driving device. Winding shaft end structure. The winding shaft end structure of the switchgear according to claim 4 , wherein the feeding position is a position between an axial center position of the winding shaft and an arrangement position of the driving device. The one rotational force countermeasure means for applying an upward counter force to the shaft end structure is disposed on the drive device arrangement position side with respect to the feeding position , and the winding shaft end structure is arranged in the vertical direction. The other turning force counter means for applying a downward counter force to the winding shaft end structure is configured to move the winding shaft against the payout position . A winding shaft end structure of an opening / closing device, characterized in that the winding shaft end portion structure is arranged on the axial center side. The winding shaft end structure of the switchgear according to claim 6, wherein the other turning force counter means includes a spring that applies a spring force to the winding shaft end structure. The winding shaft end structure of the switchgear that is characterized. The winding shaft end part structure of the switchgear according to claim 7, wherein the spring force of the spring of the other turning force counter means acts on the opening / closing body wound around the winding shaft. A winding shaft end structure of an opening / closing device, which acts on the winding shaft end structure through the opening / closing body and the winding shaft. The winding shaft end structure of the opening / closing device according to claim 8, wherein the other turning force counter means includes a rotatable roller that contacts the opening / closing body by a spring force of the spring. Winding shaft end structure of the opening and closing device. The winding shaft end structure of the switchgear according to claim 6, wherein the other turning force counter means includes a weight member that acts on the winding shaft end structure. The winding shaft end structure of the switchgear that is characterized. In the winding shaft end portion structure of the switchgear according to claim 5 , the feeding position is a position opposite to a position where the driving device is disposed with respect to an axial center position of the winding shaft, the winding shaft end structure downwardly of the other pivoting force countermeasures for applying a counterforce is arranged in the arrangement position side of the driving device with the axis position of the winding shaft, the winding The means for allowing the shaft end structure to move in the vertical direction is provided, and the one turning force counter means for applying an upward counter force to the winding shaft end structure is the driving device. The winding shaft end structure of the switchgear, wherein the winding shaft end structure is arranged at a position approaching the feeding position from the arrangement position. The winding shaft end structure of the switchgear according to claim 11, wherein the one turning force counter means includes a spring that applies a spring force to the winding shaft end structure. The winding shaft end structure of the switchgear that is characterized. The take-up shaft end structure of the switchgear according to any one of claims 1 to 12, wherein the one turning force counter means has a portion in contact with the drive device, and the take-up shaft end structure A winding shaft end structure of an opening / closing device, wherein the body is rotatable in the vertical direction around the drive device. The winding shaft end portion structure of the switchgear according to any one of claims 1 to 13 , wherein the end portion of the winding shaft and the main body portion of the winding shaft that winds and unwinds the opening and closing body are directly connected. A winding shaft end structure of a switchgear characterized by a coupled structure. The winding shaft end portion structure of the opening and closing device according to any one of claims 1 to 13 , wherein the end portion of the winding shaft and the main body portion of the winding shaft that winds and unwinds the opening and closing body, A winding shaft end structure of a switchgear, characterized in that it is structured to be connected via a misalignment absorbing means. The winding shaft end structure of the switchgear according to any one of claims 1 to 15 , wherein the winding shaft end structure is provided at one end of the winding shaft, and the other of the winding shafts. The end portion of the winding shaft is in a free state that is not fixed at a fixed position, and prevents the winding shaft from moving in the axial direction of the winding shaft and in the longitudinal direction of the diameter of the winding shaft. A winding shaft end structure of a switchgear characterized by comprising winding shaft movement blocking means.

Images