JP6220475B1 - Shutter hoisting method for shutter opening / closing device, detachable holder and foot-type holder - Google Patents

Abstract

The present invention provides a shutter hoisting method for an opening / closing machine in which only one operator can perform the hoisting work of a shutter. An opening / closing machine switches a chain wheel around which a chain 41 is wound, a shift lever 44 for moving the chain wheel in the axial direction and coupling it to a brake drum, and switching the brake drum from a locked state to a released state. A brake lever 15 is provided. In the hoisting method, when the chain wheel and the brake drum are coupled by rotating the shift lever, the shift lever is held at the coupling position by using the detachable holder 60. When the brake lever is switched to the release position, the brake lever is switched to the release position and held using the foot-operated holder 80. While holding the brake lever in the released position, pull down the chain repeatedly to wind up the shutter. When it is wound up to a predetermined height position, the foot is released from the stepping plate 83 of the foot-operated holder and the brake lever is returned to the locked position. [Selection] Figure 2

Description

  The present invention relates to a shutter hoisting method in which a chain is repeatedly pulled down to wind up a shutter at the time of checking a shutter opening / closing device, etc., and a detachable holding tool and a stepping type holding tool used therefor.

  Conventionally, as a shutter opening / closing device, for example, as described in Patent Document 1, a chain wheel around which a chain is wound is juxtaposed with a motor, and the shutter is normally opened and closed by the motor, and an emergency such as a power failure occurs. It is known that the shutter can be opened and closed by operating the chain when the main power supply is shut off at the time of installation or inspection.

  Such a shutter opening / closing device usually includes two levers as an operation tool separately from the chain wheel. For one, the chain wheel is pivoted around the axis against the reaction force of the shift lever spring to move the chain wheel in the axial direction and couple it to the brake drum in an integrated manner (so that the rotation is integrated). The other shift lever is a brake lever for switching the brake drum from a locked state where it cannot rotate to a released state where it can rotate against the reaction force of the brake spring.

The shutter hoisting method of the shutter opening / closing device is performed according to the following procedure.
(1) First, by pulling a shift lever string connected to the distal end of the shift lever, the shift lever is rotated about the base end axis to couple the chain wheel and the brake drum together in a rotating manner. .
(2) Next, hold both sides of the chain firmly with both hands.
(3) Also, pull the own weight lowering string tied to the tip of the brake lever to switch the brake drum to the released state.
(4) With the weight drop string pulled, pull down the chain repeatedly to wind up the shutter.
(5) When the shutter is wound up to a predetermined height position, the self-weight drop string is released first while the chain is held, and then the shift lever string is released.

JP-A-6-185279

  However, in the conventional shutter hoisting method, both sides of the chain are held with both hands while the shift lever string is pulled, or the chain is pulled down repeatedly while the weight drop string is pulled. There is a problem that two or more workers are required for the hoisting work because it is necessary to wind up.

  The present invention has been made in view of such a point, and a first problem thereof is that the shutter winding of the shutter opening / closing machine that can perform the winding operation of the shutter by only one operator by using an appropriate holder. It is to provide the above method.

  The second object of the present invention is to provide a holder suitable for carrying out the shutter hoisting method.

  In order to solve the first problem, a first invention of the present invention is a chain wheel around which a chain is wound, and the chain wheel is moved in the axial direction so as to rotate integrally with a brake drum (rotation). A shift lever that is pivoted around the shaft against the reaction force of the shift lever spring in order to be coupled, and the brake drum resists the reaction force of the brake spring from a locked state where the brake drum cannot be rotated. And a shutter opening / closing machine having a brake lever for switching to a rotatable release state. As a method for winding the shutter of such a shutter opening / closing device, first, the chain lever and the brake drum are rotated by rotating the shift lever around the axis against the reaction force of the shift lever spring. When coupled together, the shift lever is held in the coupled position using a detachable holder attached in a predetermined state. Subsequently, when the brake lever is switched to the release position corresponding to the release state of the brake drum, the brake lever is installed using a foot-operated holding tool that is installed in a predetermined state and performs a switching operation and a holding operation by a stepping operation of a foot plate. Is switched to the release position and held. While holding the brake lever in the release position using the foot-operated holding tool, the chain is repeatedly pulled down by hand to wind up the shutter. When the shutter is rolled up to a predetermined height position, with the chain held by hand, the foot is released from the stepping plate of the foot-operated holding tool, and the brake lever is locked corresponding to the locked state of the brake drum. Return to. Thereafter, the shift lever is returned to its original position, the detachable holder is removed, and the stepping holder is removed from the installation location.

  In this configuration, as in the conventional case, one worker holds the shift lever in his hand and holds it in the coupling position, while another worker holds both sides of the chain with both hands, It is not necessary for another worker to repeatedly pull the chain down and roll up the shutter while holding the brake lever in his / her release position, and only one operator can perform the hoisting operation of the shutter. .

  In addition, when the shutter is rolled up by repeatedly pulling the chain down by hand while the brake lever is held in the released position using the foot-operated holding tool, the emergency is triggered when the shutter is rolled up to the predetermined height position or in the middle When it is necessary to stop the hoisting of the shutter, it is necessary not only to stop the pulling down of the chain, but also to lift the shutter by releasing the foot from the foot plate of the foot-operated holder and returning the brake lever to the locked position. Therefore, safety can be improved accordingly.

  Here, the detachable holder is made of a rectangular plate member that is long in one direction, one end is attached to a support part that supports the chain wheel, and the other end part has an engaging part, When the shift lever is held in the coupling position, it is preferable that the other end is orthogonal to the shift lever and the engaging portion engages with the shift lever. In this case, since the structure of the detachable holder is simple, it is advantageous for implementation.

  The foot-operated holding tool includes a floor plate disposed on the floor, the ground, or a scaffold, a foot plate having one end rotatably connected to the floor plate, and one end at the other end of the foot plate. It is preferable that the rope is connected to the brake lever with a coil spring interposed in the middle or the other end thereof. In this case, since the stepping operation force of the treadle is transmitted to the brake lever via the coil spring, the operation force transmitted to the brake lever is suppressed compared to the case where the stepping operation force is directly transmitted to the brake lever. Thus, the operation force can be easily adjusted.

  In order to solve the second problem, a second invention of the present invention is a detachable holder used in the shutter hoisting method of the shutter opening / closing device according to the first invention, which is described below. The configuration is as follows.

  That is, the detachable holder is made of a rectangular plate member that is long in one direction, one end is attached to a support part that supports the chain wheel, and the other end part has an engaging part, When the shift lever is held at the coupling position, the other end is orthogonal to the shift lever and the engaging portion is engaged with the shift lever. In this case, since the structure of the detachable holder is simple, it is advantageous for implementation.

  The third invention is a foot-operated holding tool used in the shutter hoisting method of the shutter opening / closing device according to the first invention, and has the following configuration.

  That is, the foot-operated holding tool includes a floor plate disposed on the floor surface, the ground, or a scaffold, a foot plate having one end portion rotatably connected to the floor plate, and one end portion on the other end portion of the foot plate. The rope is connected to the brake lever with a coil spring interposed in the middle or on the other end side. In this case, since the stepping operation force of the treadle is transmitted to the brake lever via the coil spring, the operation force transmitted to the brake lever is suppressed compared to the case where the stepping operation force is directly transmitted to the brake lever. Thus, the operation force can be easily adjusted.

  According to the shutter hoisting method of the shutter opening / closing device of the present invention, by using a detachable holder that holds the shift lever in the coupling position and a stepping type holder that switches and holds the brake lever to the release position, The operator can perform the shutter hoisting work alone. In addition, when the shutter is rolled up by repeatedly pulling the chain down by hand while the brake lever is held in the released position using the foot-operated holding tool, the emergency is triggered when the shutter is rolled up to the predetermined height position or in the middle When it is necessary to stop the hoisting of the shutter, it is necessary not only to stop the pulling down of the chain, but also to lift the shutter by releasing the foot from the foot plate of the foot-operated holder and returning the brake lever to the locked position. Therefore, safety can be improved accordingly.

  According to the detachable holder of the present invention, since the structure of the detachable holder is simple, it is advantageous for implementation.

  According to the foot-operated holding tool of the present invention, the stepping operation force of the tread plate is transmitted to the brake lever via the coil spring, so that the stepping operation force is transmitted to the brake lever as compared with the case where the stepping operation force is directly transmitted to the brake lever. Therefore, the operation force can be easily adjusted.

FIG. 1 is a front view of a shutter switch to which a shutter hoisting method for a shutter switch according to an embodiment of the present invention is applied. FIG. 2 is an arrow view seen from the X direction of FIG. FIG. 3 is an enlarged cross-sectional view taken along line YY of FIG. 4 is a cross-sectional view taken along line ZZ in FIG. FIG. 5 is a configuration diagram showing an internal configuration of an electromagnetic solenoid which is a part of the shutter opening / closing device.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments that are modes for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows an overall configuration of a shutter switch 1 to which a shutter winding method of a shutter switch according to an embodiment of the present invention is applied. As shown in FIG. 2, the shutter opening / closing machine 1 has a plurality of mounting boss portions 2 on the back side thereof, and each mounting boss portion 2 abuts on a building-side mounting member 3 and is fixed with bolts 4 or the like. Thus, it is attached to the attachment member 3.

  Moreover, as shown in FIG. 1, the shutter opening / closing machine 1 has the output shaft 5 in the one end side of a longitudinal direction (left-right direction in FIG. 1). Two rows of drive sprockets 6 and 6 are attached to the output shaft 5, and these two rows of drive sprockets 6 and 6 are not shown, but are connected to two rows of driven sprockets attached to the spindle of the take-up drum. On the other hand, it is linked so that power can be transmitted through two rows of chains. The shutter opening / closing device 1 is configured by connecting a speed reduction unit 7, a motor unit 8, and a brake unit 9 in the axial direction from the output shaft 5 side. Although not shown, the speed reduction unit 7 is configured to decelerate the power from the motor unit 8 side and transmit it to the output shaft 5.

  As shown in FIGS. 3 and 4, the brake unit 9 includes a brake drum 12 that is rotatably attached to the motor shaft 11 by a key structure, and a brake drum 12 that is pressed against the brake drum 12 to generate a braking force. A pair of brake shoes 13, 13 that are locked in a non-rotatable state, a brake spring 14 that is constantly urged so that each brake shoe 13 is pressed against the brake drum 12 to maintain the brake drum 12 in a locked state, And a brake lever 15 for switching the drum 12 from a locked state where the drum 12 cannot rotate to a released state where the drum 12 can rotate against the reaction force of the brake spring 14.

  As shown in FIG. 4, the brake drum 12 is a circular member in plan view, and has a through hole 16 through which the motor shaft 11 passes in the center thereof. On one side of the brake drum 12, a recess 17 is provided in which a coupling pin 46 of a chain wheel 42 described later can be fitted. In the present embodiment, the four recesses 17 are formed in a fan shape with four equal intervals along the circumferential direction and a central angle of 90 degrees. However, the number and shape of the recesses 17 are not limited thereto.

  As shown in FIG. 4, each brake shoe 13 is a member that is curved in an arc shape in a plan view, and is arranged in a state of extending in the vertical direction with the brake drum 12 as the center. One end (lower end) of each brake shoe 13 is rotatably supported by a brake case 19 via a support shaft 18 made of a bolt. A brake lining 21 is fixed to an intermediate portion of each brake shoe 13 so as to face the outer peripheral surface of the brake drum 12, and the other end portions (upper end portions) of the respective brake shoes 13 are opposed to each other at a predetermined distance. A facing surface 22 is formed. A set pin 23 protruding upward is fixed to the other end of each brake shoe 13.

  As shown in FIG. 4, the brake spring 14 is formed of a compression coil spring disposed between the set pins 23 and 23 of the pair of brake shoes 13 and 13. The brake spring 14 is always urged so that the opposing surfaces 22 and 22 of the pair of brake shoes 13 and 13 are brought close to each other, whereby the outer periphery of the brake drum 12 is applied by the brake linings 21 and 21 of the pair of brake shoes 13 and 13. The brake drum 12 is maintained in a non-rotatable locked state with the surfaces sandwiched from both sides.

  A rectangular parallelepiped cam 24 is disposed between the opposing surfaces 22 of the pair of brake shoes 13, 13, and the brake lever 15 is connected to the cam 24 via a brake lever shaft 25. The brake lever shaft 25 extends in a direction parallel to the motor shaft 11 and penetrates the cam 24 and is fixed to the cam 24 by welding. As shown in FIG. 3, one end of the brake lever shaft 25 is inserted into an insertion hole 26 provided in the brake case 19 and is rotatably supported, and an intermediate portion of the brake lever shaft 25 is The end plate 27, which is a side plate of the brake unit 9, is rotatably supported by the end plate 27 via a bearing 28 while penetrating the end plate 27. The other end of the brake lever shaft 25 is fixed to the base end of the brake lever 15. When the brake lever 15 is turned counterclockwise from the state indicated by the phantom line in FIG. 4, the turning operation force is transmitted to the cam 24 via the brake lever shaft 25, and the cam 24 is at the edge portion. The contact surfaces 22 and 22 of the pair of brake shoes 13 and 13 are brought into contact with each other, and the distance between the facing surfaces 22 and 22 is increased against the reaction force (biasing force) of the brake spring 14. Thereby, the brake linings 21 and 21 of the pair of brake shoes 13 and 13 are respectively separated from the outer peripheral surface of the brake drum 12 and switched to a release state in which the brake drum 12 can rotate.

  As shown in FIG. 3, the end plate 27 has a plurality of (three in FIG. 4) hexagonal struts 31, 31, 31 interposed between the brake case 19 and the brake case 19 in order to ensure a predetermined space. It is supported by. Each hexagonal column 31 has male screw portions 31 a and 31 b at both ends, and one male screw portion 31 a is screwed into a screw hole 32 provided in the brake case 19 and fixed. The other male screw portion 31b is screwed and fixed to a nut 33 (see FIG. 2) in a state of passing through the end plate 27, except in the case of a hexagonal column 31 corresponding to a position where a detachable holder 60 described later is attached. ing.

  The brake unit 9 incorporates a manual opening / closing mechanism 40 for manually opening / closing the shutter at the time of inspection or the like. 2 and 3, the manual opening / closing mechanism 40 is shifted so that the chain wheel 42 around which the chain 41 is wound and the chain wheel 42 are moved in the axial direction to be coupled to the brake drum 12 in an integral manner. And a shift lever 44 that is rotated about an axis against the reaction force of the lever spring 43.

  The chain 41 is composed of an endless link chain, and is wound around the upper half of the chain wheel 42.

  As shown in FIG. 3, the chain wheel 42 is disposed concentrically at the end of the motor shaft 11 with the chain wheel shaft 45 interposed therebetween. The chain wheel 42 is fitted to the chain wheel shaft 45 so as to be relatively rotatable and move integrally in the axial direction. The chain wheel shaft 45 is fitted to the end portion of the motor shaft 11 so as to be relatively rotatable and to be relatively movable in the axial direction by a predetermined distance.

  The chain wheel 42 is provided with coupling pins 46 at two locations across the chain wheel shaft 45. Each coupling pin 46 protrudes from the side surface of the chain wheel 42 on the brake drum 12 side. When the chain wheel 42 moves from the position away from the brake drum 12 by a predetermined distance in the axial direction toward the brake drum 12 integrally with the chain wheel shaft 45 as shown in FIG. It fits into the corresponding recess 17. When the chain wheel 42 is rotated from this state, each coupling pin 46 comes into contact with the wall surface of the recess 17, and when the brake drum 12 is in the released state, the brake drum 12 is coupled to the chain wheel 42 with respect to the rotation of the chain wheel 42. Rotate together.

  The chain wheel shaft 45 extends to the outside of the end plate 27 (on the side opposite to the arrangement side of the chain wheel 42) through a through hole 47 provided in the end plate 27 and a center hole 49 of the boss member 48. The boss member 48 includes a cylindrical portion 48a having a center hole 49 and an annular flange portion 48b integrally formed at one end of the cylindrical portion 48a. The flange portion 48 b is fixed to the peripheral portion of the through hole 47 on the outer surface of the end plate 27 by bolting. The cylindrical portion 48 a is provided with a guide pin 51 made of a screw rod in a state in which a part thereof protrudes inside the center hole 49, and a part of the guide pin 51 (on the outer peripheral surface of the chain wheel shaft 45 ( A spiral guide groove 52 is formed in which a portion protruding inside the center hole 49 is fitted. When the spiral guide groove 52 is viewed in the center line direction of the chain wheel shaft 45, the angle between two straight lines connecting both ends of the guide groove 52 and the center point is about 90 degrees. When viewed in a direction perpendicular to the center line of the first, it extends over a predetermined distance in the axial direction. Therefore, the chain wheel shaft 45 moves by a predetermined distance in the axial direction while rotating about 90 degrees around the center line under the guide by the fitting of the guide pin 51 and the guide groove 52. The chain wheel 42 is supported by the end plate 27 via a chain wheel shaft 45 and a boss member 48 so as to be rotatable and movable in a predetermined distance in the axial direction. The end plate 27 constitutes a support portion that supports the chain wheel 42.

  The shift lever 44 is provided at the extending side end of the chain wheel shaft 45 so as to protrude radially outward from the outer peripheral surface thereof.

  As shown in FIGS. 2 and 3, the shift lever spring 43 is formed of a tension coil spring, one end of which is the base end of the shift lever 44 (the end on the chain wheel shaft 45 side), and the other end is The end plate 27 is latched at the distal end portion of the latch member 53 whose base end portion is planted. Here, when the shift lever 44 is in the separation position indicated by the solid line in FIGS. 2 and 3, the shift lever spring 43 is positioned on the end plate 27 side of the shift lever 44 as shown in FIG. For this reason, when the shift lever 44 is rotated from the separation position around the axis (around the axis of the chain wheel shaft 45) to the coupling position indicated by the phantom line in FIGS. As a result of this, the chain wheel shaft 45 and thus the chain wheel 42 are moved axially in one direction (leftward in FIG. 3) and coupled to the brake drum 12.

  In the shutter hoisting method of the present embodiment, a detachable holder 60 is used for holding the shift lever 44 in the coupling position when the shift lever 44 is rotated about its axis.

  As shown in FIGS. 2 and 3, the detachable holder 60 includes a holder body 61 and a hexagonal column 62 that supports the holder body 61. The hexagonal strut 62 has female threaded portions 62a and 62b at both ends, and one female threaded portion 62a is screwed into the male threaded portion 31b of the hexagonal strut 31 penetrating the end plate 27, and the hexagonal strut 62 is It is fixed to the end plate 27.

  The holder main body 61 is a rectangular plate member that is long in one direction. A long hole 63 that is long in the longitudinal direction of the holder main body 61 is provided at one end of the holder main body 61, and the screw 64 is screwed into the other female screw part 62 b of the hexagonal column 62 through the long hole 63 to hold the holder main body 61. The tool body 61 is fixedly supported by the hexagonal column 62. The holder main body 61 has an engaging portion 65 made of a hexagon socket head bolt at the other end portion 61a. When the shift lever 44 is held at the coupling position, the other end portion 61a is orthogonal to and engages with the shift lever 44. The joining portion 65 is adapted to engage with the shift lever 44.

  Further, in the shutter winding method of the present embodiment, when the brake lever 15 is switched to the release position corresponding to the release state of the brake drum 12, the brake lever 15 is switched to the release position and held separately. A foot-operated holding tool 80 is used.

  The electromagnetic solenoid 70 is for switching the brake lever 15 between a locked position and a released position corresponding to the locked state of the brake drum 12 when the shutter opening / closing device 1 is energized. Is attached to the outer surface of the end plate 27 at a lower position. As shown in FIG. 5, the electromagnetic solenoid 70 includes a movable iron core 71 extending in the vertical direction, an excitation coil 72 surrounding the outer periphery of the movable iron core 71, and a plunger connected to the upper end of the movable iron core 71. 73 and a solenoid rod 74 that connects the plunger 73 and the tip of the brake lever 15. When the exciting coil 72 is energized by energization, the plunger 73, the movable iron core 71, and the solenoid rod 74 move downward from the illustrated position by a predetermined dimension, whereby the brake lever 15 is switched from the locked position to the released position. .

  As shown in FIG. 2, the foot-operated holding tool 80 is connected to a floor plate 81 installed on the floor surface, the ground, or a scaffold, and the floor plate 81 and one end thereof are rotatably connected via a hinge member 82. And a rope 86 having one end connected to the other end of the tread 83 via a glass pin 84, a length adjusting fixture 85, and the like. The rope 86 is connected to the brake lever 15 with a coil spring 87, a garapina 88, an electromagnetic solenoid 70, and the like interposed on the other end side. The length adjusting fixture 85 is for adjusting the length of the rope 86 so that the rope 86 hangs down with a predetermined gap between the other end portions of the floor plate 81 and the footboard 83.

  Next, an operation procedure when manually lifting the shutter in the shutter opening / closing device 1 (that is, the shutter winding method of the present embodiment) will be described.

  First, the detachable holder 60 is attached to the end plate 27 in a predetermined state (specifically, the holder body 61 is fixedly supported by the hexagonal column 62). Before and after that, the foot-operated holding tool 80 is placed in a predetermined state, that is, in a state where the switching operation and the holding operation can be performed by the stepping operation of the foot plate 83.

  Subsequently, the shift lever 44 is rotated from the separation position to the coupling position around the axis against the reaction force of the shift lever spring 43 to move the chain wheel 42 in the axial direction, and the chain wheel 42 and the brake drum 12 Are coupled together in a rotating manner.

  Next, the shift lever 44 is held at the coupling position by using the detachable holder 60.

  Subsequently, the brake lever 15 is switched to the release position against the reaction force of the brake spring 14 by the stepping-type holder 80, that is, by the stepping operation of the stepping plate 83, and is held.

  Next, the chain 41 is repeatedly pulled down by hand while the brake lever 15 is held in the released state using the foot-operated holding tool 80 to wind up the shutter.

  When the shutter is rolled up to a predetermined height position (the height position immediately before the seat plate at the lower end of the shutter contacts the shutter case or the ceiling surface), the foot plate 83 of the foot-operated holding tool 80 with the chain 41 held by hand. The foot is released from the brake lever 15 and the brake lever 15 is returned to the locked position.

  Thereafter, the shift lever 44 is returned to the original separation position, the detachable holder 60 is removed from the end plate 27, and the stepping type holder 80 is removed from the installation location.

  Thus, a series of operations for winding up the shutter is completed.

  According to such a work procedure, a single worker can be obtained by using the detachable holder 60 that holds the shift lever 44 in the coupling position and the foot-holding holder 80 that holds the brake lever 15 by switching to the release position. The shutter can be rolled up only by itself.

  In addition, when the shutter 41 is rolled up by repeatedly pulling down the chain 41 by hand while the brake lever 15 is held at the release position by using the foot-operated holding tool 80, when the shutter is wound up to a predetermined height position, or When it is necessary to urgently stop the winding of the shutter on the way, not only the pulling down of the chain 41 is stopped, but also the foot is released from the tread plate 83 of the stepping type holder 80 to return the brake lever 15 to the locked position. As a result, the winding of the shutter can be stopped, so that the safety can be improved accordingly.

  In particular, in this embodiment, the holder main body 61 of the detachable holder 60 is formed of a rectangular plate member that is long in one direction, and one end of the holder main body 61 is attached to the end plate 27 that supports the chain wheel 42 via the hexagonal column 62. The other end portion 61a has an engaging portion 65, and when the shift lever 44 is held at the coupling position, the other end portion 61a is orthogonal to the shift lever 44 in a side view and the engaging portion 65 is The shift lever 44 is engaged. In this case, since the structure of the detachable holder 60 is simple, it is advantageous for implementation.

  Further, the foot-operated holding tool 80 includes a floor plate 81 disposed on the floor surface, the ground, or a scaffold, a foot plate 83 having one end rotatably connected to the floor plate 81, and the other end of the foot plate 83. The rope 86 is connected to the brake lever 15 with a coil spring 87 interposed on the other end side. In this case, since the stepping operation force of the tread plate 83 is transmitted to the brake lever 15 via the coil spring 87, the operation force transmitted to the brake lever 15 compared to the case where the stepping operation force is directly transmitted to the brake lever 15. Therefore, the operation force can be easily adjusted.

  In addition, this invention is not limited to the said embodiment, A various other form is included. For example, in the above-described embodiment, the external drum brake device in which the pair of brake shoes 13 and 13 are brought into pressure contact with the outer peripheral surface of the brake drum 12 to exert the braking force has been described. The present invention can be similarly applied to an inscribed drum brake device in which a pair of brake shoes are pressed against the inner peripheral surface of a shaped brake drum to exert a braking force.

  Moreover, in the said embodiment, as the shutter rolling-up method of the shutter opening / closing machine 1, first, the attachment of the detachable holder 60 and the installation of the foot-operated holder 80 were performed. When attaching the detachable holder 60, the shift lever 44 is rotated around the axis so that the chain wheel 42 and the brake drum 12 are coupled together in a rotationally integrated manner. It may be performed simultaneously with holding. Further, the installation of the foot-operated holder 80 may be performed immediately before the brake lever 15 is switched to the release position.

  Furthermore, in the above-described embodiment, the rope 86 having one end connected to the foot plate 83 as the foot-operated holding tool 80 is provided with the coil spring 87, the galapina 88, the electromagnetic solenoid 70, and the like on the other end. However, the present invention is not limited to this. For example, the rope 86 may be configured to be connected to the brake lever 15 at a position different from that of the electromagnetic solenoid 70 without interposing the electromagnetic solenoid 70 on the other end side, or the rope 86 may be coiled in the middle (that is, in the middle portion). It may be configured to be coupled to the brake lever 15 with a spring interposed. Further, the foot-operated holding tool 80 does not include the floor plate 81 disposed on the floor surface, and the foot plate 83 connected to the lower end portion of the rope 86 suspended from the brake lever 15 directly contacts the floor surface or the like. You may comprise.

DESCRIPTION OF SYMBOLS 1 Shutter opening and closing machine 12 Brake drum 14 Brake spring 15 Brake lever 27 End plate (support part)
40 Manual Opening / Closing Mechanism 41 Chain 42 Chain Wheel 43 Shift Lever Spring 44 Shift Lever 60 Removable Holder 61 Holder Main Body 65 Engagement Section 80 Foot-holding Holder 81 Floor Plate 83 Footplate 86 Rope 87 Coil Spring

Claims (5)

A chain wheel around which the chain is wound, and a shift lever that is rotated around the shaft against the reaction force of the shift lever spring in order to move the chain wheel in the axial direction so as to rotate and couple to the brake drum. And a shutter winding method for a shutter opening / closing machine comprising a brake lever for switching the brake drum from a locked state where the brake drum cannot rotate to a released state where the brake drum can rotate against a reaction force of a brake spring,
First, when the shift lever is rotated around an axis against the reaction force of the shift lever spring and the chain wheel and the brake drum are coupled together in a rotating manner, a detachable holder attached in a predetermined state. To hold the shift lever in the coupling position,
Subsequently, when the brake lever is switched to the release position corresponding to the release state of the brake drum, the brake lever is installed using a foot-operated holding tool that is installed in a predetermined state and performs a switching operation and a holding operation by a stepping operation of a foot plate. And switch to the release position,
While holding the brake lever in the released position using the foot-operated holder, the chain is repeatedly pulled down by hand to wind up the shutter,
When the shutter is rolled up to a predetermined height position, with the chain held by hand, the foot is released from the stepping plate of the foot-operated holding tool, and the brake lever is locked corresponding to the locked state of the brake drum. To
Thereafter, the shift lever is returned to its original position, the detachable holder is removed, and the stepping type holder is removed from the installation location.   The detachable holder is made of a rectangular plate member that is long in one direction, one end of which is attached to a support that supports the chain wheel, the other end has an engaging portion, and the shift lever 2. The shutter of the shutter opening and closing machine according to claim 1, wherein the other end portion is orthogonal to the shift lever and the engaging portion is engaged with the shift lever when the shutter is held at the coupling position. Winding method.   The foot-operated holding tool has a floor plate disposed on the floor, the ground, or a scaffold, the foot plate having one end rotatably connected to the floor plate, and one end at the other end of the foot plate. The shutter opening / closing machine according to claim 1, wherein the rope is connected to the brake lever with a coil spring interposed in the middle or at the other end thereof. Shutter winding method. A detachable holder used in the method for winding the shutter of the shutter opening and closing machine according to claim 1,
The detachable holder is made of a rectangular plate member that is long in one direction, one end of which is attached to a support that supports the chain wheel, the other end has an engaging portion, and the shift lever A detachable holder, wherein the other end portion is orthogonal to the shift lever and the engaging portion engages with the shift lever when the lever is held at the coupling position. A foot-operated holding tool used in the shutter hoisting method of the shutter opening and closing machine according to claim 1 or 2,
The foot-operated holding tool has a floor plate disposed on the floor, the ground, or a scaffold, the foot plate having one end rotatably connected to the floor plate, and one end at the other end of the foot plate. And a rope that is connected to the brake lever with a coil spring interposed in the middle or at the other end thereof.

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