Shutter drive shaft structure

Abstract

To provide a shutter drive shaft structure using an existing bearing.SOLUTION: The shutter drive shaft structure is composed of: a drive shaft assembly 3 composed of a main body 30 fixed to one of the existing left and right brackets and a shaft 31 protruding from the main body 30; and a hollow cylindrical rotating body 4 with an open base end. The rotating body 4 is provided with a sprocket 41 around the base end thereof, and an insertion part 43 through which the shaft 31 is inserted is formed on an end face 42 on a tip side of rotating body 4. The rotating body 4 internally mounts the main body 30, and is rotatably supported on the shaft 31, and the rotating body 4 is connected to a drive side end of a winding shaft 5.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a drive shaft structure for a shutter. [Background technology]

[0002] In a manual shutter, the shutter curtain is wound onto a winding shaft that is rotatably supported on left and right manual winding shafts provided on the surfaces of the left and right brackets, or the shutter curtain is unwound from the winding shaft to open and close the opening.

[0003] There are cases where a manual shutter needs to be modified to become electric (see Patent Document 1). In most cases, modifications are carried out while leaving the left and right brackets intact. To turn one of the existing brackets into a drive bracket, a drive shaft needs to be attached to that bracket, but the existing bracket is provided with a bearing that supports the manual winding shaft, and the existing bearing interferes with the attachment of the drive shaft.

[0004] In renovation work, for example, if only the underside of the shutter case is removable, the work space is limited, making it difficult to carry out on-site work to remove the existing bearings, and if the existing bearings are integrally formed with the bracket, it is not possible to remove just the bearings. [Patent Document 1] Patent Publication No. 2004-257167 DISCLOSURE OF THE INVENTION [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a shutter drive shaft structure that utilizes existing bearings and simplifies on-site work. [Means for solving the problem]

[0006] The technical means adopted by the present invention to solve such problems are as follows: a drive shaft assembly including a main body portion fixed to one of the existing left and right brackets and a shaft portion protruding from the main body portion; a hollow cylindrical rotor having an open base end; It consists of a sprocket is provided around the base end of the rotor, and an insertion portion through which the shaft portion is inserted is formed on an end surface of the tip end of the rotor; The rotating body accommodates the main body and is rotatably supported on the shaft portion, and the rotating body is connected to a drive side end of the winding shaft. The shutter drive shaft structure. In one embodiment, the rotor is cylindrical. In one embodiment, the inner wall of the rotating body and the main body are spaced apart and are in a non-contact state.

[0007] In one embodiment, a plurality of engagement pieces are protruding from the end surface of the tip side of the rotor, and are engaged with an engagement receiving portion of the drive side end of the winding shaft, An opening / closing mechanism is provided on the one bracket, The sprocket and the opening / closing device are connected by a chain.

[0008] In one embodiment, the shaft portion of the drive shaft assembly comprises a first portion that supports the rotating body and a second portion that protrudes from the rotating body, and the second portion supports the drive side end of the winding shaft. In one embodiment, the winding shaft includes an outer cylinder and an inner cylinder, the second portion is inserted into the inner cylinder, and the inner cylinder is supported by the second portion.

[0009] The assembly method of the shutter drive shaft structure adopted in the present invention is as follows: A drive shaft assembly is prepared, which includes a main body and a shaft protruding from the main body, and the main body is fixed to one of the existing left and right brackets. a rotating body including a hollow cylindrical body having an open base end and an end face at a tip end, a sprocket provided around the base end of the body, an insertion portion formed on the end face, and an engagement piece protruding from the end face; the body portion of the drive shaft assembly is fitted inside the body, and is rotatably supported by the shaft portion that passes through the insertion portion; connecting the sprocket to an opening / closing device fixed to the one bracket with a chain; Engaging the engagement piece on the end surface of the rotating body with a winding shaft; It consists of: [Effects of the Invention]

[0010] In this invention, the shutter drive shaft structure is composed of a drive shaft assembly fixed to an existing bearing and a rotating body with a sprocket mounted around it, and the rotating body is supported by the shaft portion of the drive shaft assembly and connected to the drive side end of the winding shaft, thereby providing a shutter drive shaft structure that utilizes existing bearings and further simplifies on-site work. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is an exploded perspective view of the drive shaft structure according to the first embodiment. [Figure 2] FIG. 1 is a side view of a drive shaft structure according to a first embodiment. [Figure 3] 3 is a front view seen from the arrow A in FIG. 2 (the opening / closing device is omitted). [Figure 4] 1 is a view of a drive shaft structure according to a first embodiment, seen obliquely from above. [Figure 5] 10 is an exploded perspective view of a drive shaft structure according to a second embodiment, and a perspective view of a driven-side bracket. FIG. [Figure 6] FIG. 10 is a side view of a drive shaft structure according to a second embodiment. [Figure 7] FIG. 7 is a front view seen from the arrow B in FIG. 6. [Figure 8] 10A and 10B are diagrams showing the connection between the drive shaft structure and the winding shaft according to the second embodiment. [Figure 9] 10 is an exploded perspective view of a drive shaft structure according to a third embodiment, and a perspective view of a driven-side bracket. FIG. [Figure 10] FIG. 10 is a side view of a drive shaft structure according to a third embodiment. [Figure 11] FIG. 11 is a front view seen from the arrow C in FIG. 10 (slats are omitted). [Figure 12] 10 is an exploded perspective view of a drive shaft structure according to a fourth embodiment, and a perspective view of a driven-side bracket. FIG. [Figure 13] FIG. 10 is a side view of a drive shaft structure according to a fourth embodiment. [Figure 14] FIG. 15 is a front view seen from the arrow D in FIG. 14 (slats are omitted). [Figure 15A] FIG. [Figure 15B] FIG. [Figure 16] FIG. 10 is a diagram showing a rotating body equipped with a sprocket. [Figure 17] 10 is a view showing a state in which the switch is temporarily fixed to the second member of the switch mounting structure. FIG. [Figure 18] FIG. 2 is a view showing a first member of the switchgear mounting structure. [Figure 19] FIG. 4 is a view showing a second member of the switchgear mounting structure. [Figure 20] 1 is a view showing an opening / closing mechanism mounting structure assembled from a first member and a second member. FIG. [Figure 21] The figure shows a positioning jig for the mounting holes of the switchgear. [Figure 22] 10A and 10B are diagrams illustrating a method for determining mounting holes using a positioning jig. [Figure 23] 10A and 10B are diagrams illustrating fine adjustment of the mounting position of the switchgear on the switchgear mounting base. DETAILED DESCRIPTION OF THE INVENTION

[0012] [A] Motorization of manual shutters [A-1] Overview This embodiment relates to the modification of a manual shutter, that is, the motorization of a manual shutter. In a manual shutter, a shutter curtain is wound onto a winding shaft rotatably supported on left and right manual winding shafts provided on the surface portions of the left and right brackets, or the shutter curtain is unwound from the winding shaft, and both widthwise ends of the shutter curtain are guided by grooves in guide rails G on the left and right sides of the opening and move up and down to open and close the opening. The modification according to this embodiment is carried out by leaving and utilizing the left and right brackets 1 and the bearings 2 provided on the surface portions 10 of the brackets 1.

[0013] After the modification, one bracket 1 becomes a drive-side bracket, and the other bracket 1 becomes a driven-side bracket. A drive shaft (drive shaft structure) 5A of the winding shaft 5 is mounted on the drive-side bracket, utilizing the bearing 2 of the existing one bracket. A driven shaft 54 ​​of the winding shaft 5 is mounted on the driven-side bracket, utilizing the bearing 2 of the existing other bracket (see FIGS. 3, 7, 11, and 14). The winding shaft 5 is rotatably supported between the left and right brackets 1 by a drive shaft at one end of its length and a driven shaft at the other end of its length. An opening / closing device 6 is attached to the drive-side bracket so as to face the drive shaft (drive shaft structure) of the winding shaft 5, and rotational force is transmitted to the drive shaft (drive shaft structure) of the winding shaft 5 via a chain C. Several embodiments are disclosed in this specification, but first, common elements, a drive shaft structure, and an opening / closing device mounting structure used in motorizing a manual shutter are described.

[0014] [A-2] Drive shaft assembly The drive shaft assembly 3 is a member that is attached to the surface 10 of the existing bracket 1 of the manual shutter by utilizing the existing bearing 2 provided on the surface 10 of the bracket 1 (see Figures 1, 5, 9, and 12). As shown in Figures 15A and 15B, in this embodiment, two types of drive shaft assemblies 3 are used depending on the embodiment, but the basic structure is the same.

[0015] As shown in FIG. 15A, the drive shaft assembly 3 comprises a main body 30 and a shaft 31 protruding from the main body 30. The main body 30 of the drive shaft assembly 3 is a hollow rectangular parallelepiped that is open on the side opposite the shaft 31, and is attached to the face 10 of the bracket 1 using a bearing 2. The main body 30 has opposing first and second side surfaces 300, 301, and opposing third and fourth side surfaces 302, 303, and the first and second side surfaces 300, 301 have opposing insertion holes 306 formed therein. The base end of the shaft 31 is fixed to a front surface 307 of the main body 30, and the rear end of the main body 30 is open.

[0016] The shaft portion 31 is a columnar or cylindrical member with a circular cross section, and is composed of a first portion 310 on the base end side and a second portion 311 on the tip end side, with the first portion 310 having a slightly larger diameter than the second portion 311. A disk-shaped tip portion 312 having a slightly larger diameter than the second portion 311 is formed at the tip of the second portion 311. A groove 313 is formed around the entire periphery of the tip of the first portion 310. The drive shaft assembly 3 shown in FIG. 15A is attached to the bracket 1 by placing the main body portion 30 over the bearing 2 and fixing it to the bearing 2 (see FIGS. 5, 9, and 12). Details of the attachment of the drive shaft assembly 3 shown in FIG. 15A will be described later.

[0017] The drive shaft assembly 3 shown in FIG. 15B has the same configuration as the drive shaft assembly 3 shown in FIG. 15A except for some configuration of the main body 30 (presence or absence of bent pieces 304, 305), and the above description can be used to explain the common parts. However, the outer dimensions of the main body 30 of the drive shaft assembly 3 shown in FIG. 15A are larger than those of the main body 30 of the drive shaft assembly 3 shown in FIG. 15B. As shown in FIG. 15B, bent pieces 304, 305 are integrally formed at the base ends of the third and fourth side faces 302, 303 of the main body 30 and extend perpendicular to the third and fourth side faces 302, 303 so as to be spaced apart from each other. Insertion holes 308 are formed in the bent pieces 304, 305. The drive shaft assembly 3 shown in Fig. 15B is attached to the bracket 1 by positioning the main body 30 inside the bearing 2 and fixing it to the bearing 2, and fixing the bent pieces 304, 305 to the surface 10 of the bracket 1 (see Fig. 1). The details of the attachment of the drive shaft assembly 3 shown in Fig. 15B will be described later.

[0018] [A-3] Cylindrical rotating body A cylindrical rotor 4 is rotatably mounted on the drive shaft assembly 3 attached to the face 10 of one of the brackets 1. As shown in FIG. 16, the cylindrical rotor 4 comprises a hollow, approximately cylindrical main body 40 with an open base end and a circular end face 42 at the tip end, a sprocket 41 protruding in the outer circumferential direction from the base end of the main body 40, a through-hole 43 formed in the center of the end face 42, and two engagement pieces 44 protruding from the end face 42. The through-hole 43 is formed by a ring-shaped bushing 430 fitted in the center of the end face 42. The number of engagement pieces 44 is not limited to two, as long as there are more than one. A plurality of reinforcing ribs 47 are provided on the inner wall of the main body 40 of the cylindrical rotor 4.

[0019] [A-4] Drive shaft structure [A-4-1] Assembly of drive shaft assembly and cylindrical rotating body 4, the cylindrical rotating body 4 accommodates the main body 30 of the drive shaft assembly 3, and the first portion 310 of the shaft portion 31 is rotatably supported by the insertion portion 43 of the cylindrical rotating body 4. The inner wall of the cylindrical rotating body 4 and the main body 30 of the drive shaft assembly 3 are spaced apart and not in contact with each other. The tip end portion of the first portion 310 of the drive shaft assembly 3, including the groove 313, forms a protrusion located outside the end face 42 of the cylindrical rotating body 4, and the second portion 311 and the tip end portion 312 are located on the tip side of the protrusion. A washer 45 is provided on the base end side (closer to the end face 42 than the groove 313) of the tip end portion (protrusion) of the first portion 310, and a C-shaped retaining ring 46 is fitted into the groove 313. The washer 45 has a diameter larger than the C-shaped retaining ring 46, the first portion 310 of the drive shaft assembly 3, and the disk-shaped tip portion 312.

[0020] [A-4-2] Connection between cylindrical rotor and winding shaft The cylindrical rotating body 4 is connected to the drive side end of the winding shaft 5. As shown in FIG. 8, the winding shaft 5 according to this embodiment comprises an outer cylindrical body 50 around which the shutter curtain slats S (see FIGS. 2, 6, 10, and 13) are wound, an inner cylindrical body 51 extending inside the outer cylindrical body 50, and spacers 52 made of resin or metal fitted between the inner surface of the outer cylindrical body 50 and the outer surface of the inner cylindrical body 51 at the longitudinal ends and intermediate portion of the winding shaft 5. In this embodiment, the inner cylindrical body 51 and the driven shaft 54 ​​comprise a single continuous member. The inner cylindrical body 51 is a fixed shaft, and the outer cylindrical body 50 and spacer 52 are rotatable relative to the inner cylindrical body 51. A plurality of hollow engagement receiving portions 53 are formed at intervals in the circumferential direction between the inner surface of the outer cylindrical body 50 and the spacer 52, and engagement pieces 44 protruding from the end surface 42 of the cylindrical rotor 4 engage with the engagement receiving portions 53 on the drive-side end of the winding shaft 5, thereby connecting the cylindrical rotor 4 and the drive-side end of the winding shaft 5 and allowing them to rotate together. The shaft portion 31 of the drive shaft assembly 3 has a first portion 310 that journals the cylindrical rotor 4, and a second portion 311 and a tip portion 312 that are inserted into the internal space of the inner cylindrical body 51, with the tip portion 312 abutting or adjacent to the inner circumferential surface of the inner cylindrical body 51. The sprocket 41 mounted around the cylindrical rotor 4 is power-transmittingly connected to a sprocket 60 of the opening / closing device 6 mounted on the drive-side bracket by a chain C, so that the cylindrical rotor 4 and the winding shaft 5 rotate together when the opening / closing device 6 is driven. In this embodiment, the outer diameter of the main body 40 of the cylindrical rotating body 4 is approximately the same as the outer diameter of the winding shaft 5. As shown in Figures 3 and 7, one end (drive side) in the width direction of the shutter curtain (slat S) extends beyond the drive side end of the winding shaft 5 toward the drive side bracket, and one end side of the shutter curtain is in contact with or close to the outer peripheral surface of the main body 40 of the cylindrical rotating body 4.

[0021] [Note] a bracket provided with a bearing for the manual winding shaft; a drive shaft assembly including a main body portion fixed to the bearing and a shaft portion protruding from the main body portion; a rotating body around which sprockets are provided; It consists of The rotating body accommodates the main body and is rotatably supported on the shaft portion, and the rotating body is connected to a drive side end of the winding shaft. Shutter drive shaft structure. In one embodiment, the shaft portion of the drive shaft assembly includes a first portion that supports the rotating body, and a second portion that protrudes from the rotating body. a drive shaft assembly including a main body portion fixed to one of the left and right brackets (equipped with a bearing for the manual winding shaft) and a shaft portion protruding from the main body portion; a hollow cylindrical rotor having an open base end; It consists of a sprocket is provided around the base end of the rotor, and an insertion portion through which the shaft portion is inserted is formed on an end surface of the tip end of the rotor; The rotating body accommodates the main body and is rotatably supported on the shaft portion, and the rotating body is connected to a drive side end of the winding shaft. Shutter drive shaft structure. In one embodiment, the rotor is cylindrical. In one embodiment, the inner wall of the rotating body and the main body are spaced apart and are in a non-contact state. In one embodiment, a plurality of engagement pieces are protruding from the end surface of the tip side of the rotor, and are engaged with an engagement receiving portion of the drive side end of the winding shaft, An opening / closing mechanism is provided on the one bracket, The sprocket and the opening / closing device are connected by a chain. In one embodiment, the shaft portion of the drive shaft assembly comprises a first portion that supports the rotating body and a second portion that protrudes from the rotating body, and the drive side end of the winding shaft is supported by the second portion. In one embodiment, the winding shaft includes an outer cylinder and an inner cylinder, the second portion is inserted into the inner cylinder, and the inner cylinder is supported by the second portion. A drive shaft assembly is prepared, which comprises a main body and a shaft protruding from the main body, and the main body is fixed to one of the left and right brackets (equipped with a bearing for the manual winding shaft). a rotating body including a hollow cylindrical body having an open base end and an end face at a tip end, a sprocket provided around the base end of the body, an insertion portion formed on the end face, and an engagement piece protruding from the end face; the body portion of the drive shaft assembly is fitted inside the body, and is rotatably supported by the shaft portion that passes through the insertion portion; connecting the sprocket to an opening / closing device fixed to the one bracket with a chain; Engaging the engagement piece on the end surface of the rotating body with a winding shaft; A method for assembling a shutter drive shaft structure comprising:

[0022] [A-5] Switching mechanism and mounting structure for switching mechanism [A-5-1] Background To motorize a manual shutter, it is necessary to provide an opening / closing mechanism 6 on the drive-side bracket. The installation of the opening / closing mechanism can depend on the configuration of the existing bracket 1 and the angle irons 11-14 that connect the left and right brackets 1. However, the strength of the bracket 1 for manual shutters may be weaker than that of brackets for electric shutters (for example, if the bracket plate thickness is thin). Therefore, if the opening / closing mechanism 6 is directly fixed to the bracket 1 in a cantilevered manner, the bracket may tilt due to the weight of the opening / closing mechanism and winding shaft. In this embodiment, the opening / closing mechanism installation mechanism is configured by supporting a long second member 8 between left and right first members 7 fixed to predetermined positions on the surface portions 10 of the left and right brackets 1.

[0023] [A-5-2] First member As shown in FIG. 18 , the first member 7 comprises a first vertical piece 70 that is fixed in contact with the face 10 of the bracket 1, a bottom piece 71 that extends horizontally from the lower end of the first vertical piece 70, and a second vertical piece 72 that rises vertically from one widthwise end of the bottom piece 71. The first vertical piece 70 has holes 700 formed therein for fastening the first member 7 to the face 10 of the bracket 1 with a plurality of screws 73. In this embodiment, either the bottom piece 71 or the second vertical piece 72 of the first member is selected as the mounting piece, and the second member 8 is connected to the selected piece. That is, in the first member 7 according to this embodiment, either the bottom piece 71 or the second vertical piece 72 functions as the mounting piece depending on the mounting manner of the opening / closing device 6, thereby achieving commonality of parts. In this specification, when the first member 7 is fixed to the surface portion 10 of the bracket 1, the front-rear direction or the projection direction of the surface portion 10 of the bracket 1 is referred to as the "width direction of the bottom piece 71".

[0024] A hole 710 for fastening an opening and closing device is formed in the bottom piece 71 of the first member 7, and a hole 720 for fastening an opening and closing device is formed in the second vertical piece 72. The hole 710 is an elongated hole extending in the width direction of the bottom piece 71, and in this embodiment, two holes 710 are formed spaced apart in the width direction. The hole 720 is an elongated hole extending in the height direction of the second vertical piece 72, and in this embodiment, two holes 720 are formed spaced apart in the height direction. In this embodiment, the base end edge of the second vertical piece 72 and the first vertical piece 70 are spaced apart, and a gap 74 is formed in a front view.

[0025] [A-5-3] Second member As shown in FIG. 19 , the second member 8 is an elongated member extending in the opening width direction, with one end in the lengthwise direction being the driving side and the other end being the driven side. The second member 8 according to this embodiment has an L-shaped cross section formed by a first side 80 and a second side 81. A hole 82 for securing a switch is formed at the driving side end of the first side 80, and a hole 83 for securing a switch is formed at a location spaced apart from the hole 82. The hole 82 is an elongated hole extending in the width direction of the first side 80 (a direction perpendicular to the length direction, which may be the height direction depending on the posture of the second member 8), and the hole 83 is an elongated hole extending in the width direction of the first side 80 (a direction perpendicular to the length direction, which may be the height direction depending on the posture of the second member 8). The length of the hole 82 is greater than the length of the hole 83. A hole 82 for securing the switch is formed at the drive-side end of the second side 81, and a hole 83 for securing the switch is formed at a location spaced from the hole 82. The hole 82 is an elongated hole extending in the width direction or height direction (direction perpendicular to the length direction) of the second side 81, and the hole 83 is an elongated hole extending in the width direction or height direction (direction perpendicular to the length direction) of the second side 81. The length of the hole 82 is greater than the length of the hole 83. The second member 8 according to this embodiment is fixed to the switch 6 and the first member 7 by selectively using the first side 80 or the second side 81. That is, in the second member 8 according to this embodiment, either the first side 80 or the second side 81 functions as an attachment side depending on the installation mode of the switch 6, thereby achieving commonality of parts. No holes are formed at the driven-side ends of the first side 80 and the second side 81. By making the hole 83 an elongated hole, tilting of the opening / closing device 6 is suppressed, and the chain C and the sprocket 60 can be smoothly engaged with each other.

[0026] [A-5-4] Switch mounting mechanism and switch mounting FIG. 20 shows an opening / closing device mounting base consisting of a second member 8 and left and right first members 7 fixed to both longitudinal ends of the second member 8. FIG. 20 shows a state in which the opening / closing device 6 is not attached. In reality, the left and right first members 7 are fixed to the face portions 10 of the left and right brackets 1 with screws 73, and the second members 8 are attached to the left and right first members 7. In this way, the left and right brackets 1 are connected by an opening / closing device mounting mechanism (the left and right first members 7 and the second member 8), and the opening / closing device 6 is supported by such an opening / closing device mounting mechanism. When the first vertical piece 70 of the first member 7 is fixed to the face portion 10 of the bracket 1 with the screws 73, the bottom piece 71 extends horizontally and away from the face portion 10 of the bracket 1.

[0027] The second member 8 is placed with both longitudinal end portions of the second side 81 overlapping the bottom pieces 71 of the left and right first members 7, and then the elongated holes 82 at the drive side end of the second side 81 of the second member 8 are aligned with the holes 710 in the bottom pieces 71 of the first member 7 and connected with screws 84, and the driven side end of the second side 81 of the second member 8 is connected with screws 85 inserted through the holes 710 in the bottom pieces 71 of the first member 7. In this embodiment, the second member 8 can be temporarily placed on the bottom pieces 71 of the left and right first members 7, which provides good workability.

[0028] The opening and closing device 6 is fixed to the first member 7 and the second member 8 by a screw 84 on the side closer to the drive-side bracket, and is fixed to the second member 8 by a screw 86 on the side farther from the drive-side bracket. The opening and closing device 6 has a screw hole for the screw 84 formed therein, but in this embodiment, the elongated hole 82 of the second member is positioned between the hole 710 (or hole 720) of the first member 7 and the screw hole of the opening and closing device 6, making it easy to see the screw hole on the opening and closing device 6 through the elongated hole 82, improving workability. When the opening and closing device 6 is attached to the opening and closing device attachment mechanism, the sprocket 60 of the opening and closing device 6 is positioned in the gap 74 between the base end edge of the first vertical piece 70 and the base end edge of the second vertical piece 72 of the first member 7 in a front view. Depending on the mounting mode of the opening / closing device 6 (the positional relationship between the sprocket 41 of the drive shaft structure and the sprocket 60 of the opening / closing device 6 and the extending direction of the chain C), the chain C may extend through the gap 74.

[0029] The opening / closing device 6 is temporarily fixed to the second member 8 using screws 86, and is then attached to the first member 7 fixed to the surface portions 10 of the left and right brackets 1. The fixing position of the first vertical piece 70 of the first member 7 relative to the surface portions 10 of the bracket 1 is determined, but the holes for inserting the screws 84 are formed from the elongated holes 710 to 720 and the elongated hole 82, so the attachment position of the second member 8 relative to the first member 7 can be adjusted by using these elongated holes (see FIG. 23). The attachment position of the opening / closing device 6 can be adjusted by adjusting the attachment position of the second member 8, and thus the tension of the chain can be adjusted.

[0030] [Note] A pair of short first members fixed to the surfaces of the left and right brackets; an elongated second member supported and fixed between the pair of first members; An opening / closing mechanism mounting mechanism comprising: The opening and closing device has a first end portion closer to the one bracket and a second end portion farther from the one bracket, the first member includes an attachment piece; the second member has an attachment side, and both end portions of the attachment side of the second member in the length direction abut against the attachment piece of the first member; The first end of the opening and closing device is fixed by a fixing means to the mounting piece of the first member fixed to the surface portion of the one bracket and to the mounting edge of the second member. Switchgear mounting mechanism. In one embodiment, holes are formed in the mounting piece of the first member and the mounting edge of the second member so that they align when in contact, and at least one of the holes is a long hole extending in a direction perpendicular to the length of the mounting edge. In one embodiment, the second end of the opening and closing device is fixed to the mounting edge of the second member by a fixing means. In one embodiment, a long hole extending in a direction perpendicular to the length of the mounting side is formed in the mounting side of the second member, corresponding to the second end of the opening and closing device. In one embodiment, a drive shaft structure for a winding shaft is provided on a surface portion of the one bracket, The sprocket of the opening and closing machine and the sprocket of the drive shaft structure are connected by a chain, The tension of the chain can be adjusted by adjusting the mounting position of the opening and closing device using the long hole. The fastening means includes screws and rivets.

[0031] [B] First embodiment A first embodiment will be described with reference to Figures 1 to 4. In the first embodiment, an existing bearing 2 formed on a surface portion 10 of an existing bracket 1 is made up of a first raised piece 20 and a second raised piece 21 that rise perpendicularly and face each other relative to the surface portion 10. Opposing insertion holes are formed in the first raised piece 20 and the second raised piece 21, and these insertion holes function as insertion holes for screws (bolts) 32. In the illustrated embodiment, the first raised piece 20 and the second raised piece 21 are formed by cutting and raising the plate material of the surface portion 10, the first raised piece 20 being trapezoidal, and the second raised piece 21 being approximately rectangular, with the width dimension of the first raised piece 20 being greater than the width dimension of the second raised piece 21.

[0032] In the first embodiment, the drive shaft assembly 3 shown in FIG. 15B is used. The dimensions of the main body 30 of the drive shaft assembly 3 (the dimension between the first side surface 300 and the second side surface 301) are approximately the same as (slightly smaller than) the dimension between the first raised piece 20 and the second raised piece 21 of the bearing 2, and when the main body 30 of the drive shaft assembly 3 is inserted between the first raised piece 20 and the second raised piece 21 of one of the brackets 1 (drive side bracket), the first side surface 300 and the second side surface 301 abut or are close to the surfaces of the opposing raised pieces 20, 21, respectively, and the opposing insertion holes formed in the first raised piece 20 and the second raised piece 21 are aligned with the opposing insertion holes 306 formed in the main body 30 of the drive shaft assembly 3, and the main body 30 of the drive shaft assembly 3 and the bearing 2 are fixed by screws 32 that penetrate the opposing raised pieces 20, 21, the first side surface 300, and the second side surface 301. Furthermore, in the drive shaft assembly 3, a pair of bent pieces 304, 305 extending away from each other are formed on the rear end edges of the third side surface 302 and the fourth side surface 303 of the main body portion 30, and the main body portion 30 is fixed with screws 33 with the pair of bent pieces 304, 305 abutting against the face portion 10 of the bracket 1.

[0033] The drive shaft assembly 3 fixed to the drive-side bracket comprises a main body 30 fixed to the face 10 of the bracket 1 and a shaft 31 protruding from the main body 30. The drive shaft assembly 3 is provided with a hollow cylindrical rotating body 4 whose base end is open. A sprocket 41 is provided around the outer periphery of the main body 40 of the cylindrical rotating body 4 on the base end side, and an insertion portion 43 through which the shaft 31 of the drive shaft assembly 3 is inserted is formed on an end face 42 on the tip side of the main body 40. The main body 40 of the cylindrical rotating body 4 accommodates the main body 30 of the drive shaft assembly 3 and is rotatably supported by the shaft 31. A washer 45 is provided on the shaft 31 of the drive shaft assembly 3 so as to abut or be close to the end face 42 of the cylindrical rotating body 4, and a C-shaped retaining ring 46 is fitted in a groove 313 adjacent to the washer 45. The main body 30 and the rising pieces 20, 21 of the drive shaft assembly 3 are positioned within the hollow of the main body 40 of the cylindrical rotary body 4 with a gap therebetween.

[0034] Two engagement pieces 44 protrude from an end surface 42 on the tip side of the cylindrical rotor 4, and the engagement pieces 44 engage with engagement receiving portions 53 on the drive-side end of the winding shaft 5, thereby connecting the cylindrical rotor 4 to the drive-side end of the winding shaft 5. The shaft portion 31 of the drive shaft assembly 3 has a first portion 310 that supports the cylindrical rotor 4, and a second portion 311 and a tip portion 312 that are inserted into the internal space of the inner cylindrical body 51, with the tip portion 312 abutting or adjacent to the inner circumferential surface of the inner cylindrical body 51. The sprocket 41 mounted around the cylindrical rotor 4 is power-transmittingly connected to a sprocket 60 of the opening / closing device 6 mounted on the drive-side bracket by a chain C, so that the cylindrical rotor 4 and the winding shaft 5 rotate together when the opening / closing device 6 is driven.

[0035] In the first embodiment, the opening / closing device 6 is attached using the rising piece 16 of the existing bracket 1 and the first angle member 11. The side of the opening / closing device 6 closer to the drive-side bracket is fixed with a screw 160 using the rising piece 16, and the side of the opening / closing device 6 farther from the drive-side bracket is fixed with a screw 170 via an attachment piece 17 provided using the angle member 11.

[0036] The left and right brackets of the manual shutter according to the first embodiment are connected by four angle bars 11 to 14, and the shutter case 15 has an upper surface portion 150, a front surface portion 151, and a lower surface portion 152, with the front surface portion 151 and the lower surface portion 152 being integrally formed as an L-shaped member when viewed from the side (see FIG. 2 showing the shutter case 15 after renovation). During renovation, the L-shaped members when viewed from the side of the front surface portion 151 and the lower surface portion 152 are removed, and the winding structure of the manual shutter and the shutter curtain (consisting of multiple slats S) are removed, leaving the left and right brackets 1 and bearings 2. The assembly method for the drive shaft structure of the shutter in this embodiment comprises the steps of preparing a drive shaft assembly 3 (consisting of a main body 30 and a shaft 31 protruding from the main body 30) and fixing the main body 30 to the bearing 2 on the face 10 of the bracket 1; preparing a cylindrical rotating body 4 (consisting of a hollow cylindrical main body 40 that is open at the base end and has an end face at the tip end, a sprocket 41 arranged around the base end of the main body 40, an insertion portion 43 formed on the end face 42, and an engagement piece 44 protruding from the end face 42); fitting the main body 30 of the drive shaft assembly 3 inside the main body 40 and supporting it so that it can rotate freely by the shaft 31 through which the insertion portion 43 is inserted; connecting the sprocket 41 of the cylindrical rotating body 4 to a sprocket 60 of the opening / closing mechanism 6 fixed to the drive side bracket with a chain C; and engaging the engagement piece 44 on the end face 42 of the cylindrical rotating body 4 with the engagement receiving portion 53 of the winding shaft 5.

[0037] [Note] a bracket provided with a bearing for the manual winding shaft; a drive shaft assembly including a main body portion fixed to the bearing and a shaft portion protruding from the main body portion; a rotating body around which sprockets are provided; It consists of The rotating body accommodates the main body and is rotatably supported on the shaft portion, and the rotating body is connected to a drive side end of the winding shaft. The shutter drive shaft structure The bearing is made up of a pair of opposing raised pieces that protrude perpendicularly from the surface of the bracket, The main body is a rectangular parallelepiped, and is fixed to the bearing while being received between the opposing raised pieces. In one embodiment, the main body portion has opposing first and second side surfaces, and opposing third and fourth side surfaces, the first and second side surfaces abutting or being close to the surfaces of the opposing raised pieces, and the first and second side surfaces being fixed to the opposing raised pieces by fixing means (e.g., through-hole screws). In one embodiment, a pair of bent pieces extending away from each other are formed on the rear end edges of the third and fourth side faces of the main body, and the main body is fixed with fixing means (e.g., screws or rivets) with the pair of bent pieces abutting the surface of the bracket.

[0038] [C] Second embodiment A second embodiment will be described with reference to Figures 5 to 8. In the second embodiment, an existing bearing 2 formed on a surface portion 10 of an existing bracket 1 is U-shaped in side view and includes a pair of opposing vertical pieces 22, 22 extending upright from the surface portion 10 and a bottom piece 23 extending horizontally upright from the surface portion 10 and formed by integrating the lower ends of the pair of vertical pieces 22, 22. A bent piece 24 is formed on the base end side of the pair of vertical pieces 22, 22, and a bent piece 25 is formed on the base end side of the bottom piece 23. The bearing 2 is fixed with screws in a state in which the bent pieces 24, 25 are in contact with the surface portion 10 of the bracket 1. Opposite insertion holes are formed in the pair of vertical pieces 22, 22, and these insertion holes function as insertion holes for screws (bolts) 34.

[0039] 15A is used in the second embodiment. The dimensions of the internal space of the main body 30 of the drive shaft assembly 3 are such that the bearing 2 (a pair of vertical pieces 22, 22, and a bottom piece 23) can be housed therein. When the main body 30 is placed over the bearing 2, the upper surface of the main body 30 (the inner surface of the third side surface 302) abuts against the upper ends of the pair of vertical pieces 22 of the bearing 2, and the inner surfaces of the first side surface 300 and the second side surface 301 abut against or are close to the outer surfaces of the pair of vertical pieces 22, 22, respectively. Opposing insertion holes formed in the pair of vertical pieces 22 of the bearing 2 and opposing insertion holes 306 formed in the main body 30 of the drive shaft assembly 3 are aligned, and the main body 30 of the drive shaft assembly 3 and the bearing 2 are fixed by screws 34 that penetrate the first side surface 300, the second side surface 301, and the pair of vertical pieces 22, 22. In the drive shaft structure according to the second embodiment, even if the weight of the winding shaft 5 and the shutter curtain acts on the drive shaft assembly 3 and the tip side of the drive shaft assembly 3 tends to tilt downward around the screw 34, the upper surface of the main body 30 (the inner surface of the third side surface 302) abuts against the upper ends of the pair of vertical pieces 22 of the bearing 2, and the base end side of the lower surface of the main body 30 (the inner surface of the fourth side surface 303) abuts against the bottom piece 23 of the bearing 2, thereby restricting the tilt of the drive shaft assembly 3. The drive shaft structures according to the third and fourth embodiments have the same advantageous effects.

[0040] The drive shaft assembly 3 fixed to the drive-side bracket comprises a main body 30 fixed to the face 10 of the bracket 1 and a shaft 31 protruding from the main body 30. The drive shaft assembly 3 is provided with a hollow cylindrical rotating body 4 that is open at its base end. A sprocket 41 is provided around the base end of the main body 40 of the cylindrical rotating body 4, and an insertion portion 43 through which the shaft 31 of the drive shaft assembly 3 is inserted is formed on an end face 42 of the main body 40 at its tip end. The main body 40 of the cylindrical rotating body 4 accommodates the main body 30 of the drive shaft assembly 3 and is rotatably supported by the shaft 31. A washer 45 is provided on the shaft 31 of the drive shaft assembly 3 so as to abut or be close to the end face 42 of the cylindrical rotating body 4, and a C-shaped retaining ring 46 is fitted in a groove 313 adjacent to the washer 45.

[0041] Two engagement pieces 44 protrude from an end surface 42 on the tip side of the cylindrical rotor 4, and the engagement pieces 44 engage with engagement receiving portions 53 on the drive-side end of the winding shaft 5, thereby connecting the cylindrical rotor 4 to the drive-side end of the winding shaft 5. The shaft portion 31 of the drive shaft assembly 3 has a first portion 310 that supports the cylindrical rotor 4, and a second portion 311 and a tip portion 312 that are inserted into the internal space of the inner cylindrical body 51, with the tip portion 312 abutting or adjacent to the inner circumferential surface of the inner cylindrical body 51. The sprocket 41 mounted around the cylindrical rotor 4 is power-transmittingly connected to a sprocket 60 of the opening / closing device 6 mounted on the drive-side bracket by a chain C, so that the cylindrical rotor 4 and the winding shaft 5 rotate together when the opening / closing device 6 is driven.

[0042] In the second embodiment, the opening / closing device 6 is attached to the driving-side bracket via an opening / closing device attachment mechanism consisting of a first member 7 and a second member 8. The first member 7 has a first vertical piece 70 abutted against a predetermined portion of the face portion 10 of the bracket 1 and fixed with screws 73, and both longitudinal end portions of the second side 81 of the second member 8 are placed on the bottom pieces 71 of the left and right first members 7, with the long holes 82 in the driving-side end of the second side 81 of the second member 8 and the holes 710 in the bottom pieces 71 of the first member 7 aligned and connected from below with screws 84, and the driven-side end of the second side 81 of the second member 8 is connected with screws 85 inserted from below into the holes 710 in the bottom pieces 71 of the first member 7. The opening / closing mechanism 6 is fixed to the first member 7 and the second member 8 by a screw 84 on the side closer to the drive side bracket, and is fixed to the second side 81 of the second member 8 by a screw 86 (see Figure 17) on the side farther from the drive side bracket.

[0043] The left and right brackets of the manual shutter according to the second embodiment are connected by four angle bars 11 to 14, and the shutter case 15 has an upper surface portion 150, a front surface portion 151, and a lower surface portion 152 (see FIG. 6 showing the shutter case 15 after renovation). During renovation, the lower surface portion 152 is removed, leaving the left and right brackets 1 and bearings 2, and the winding structure of the manual shutter and the shutter curtain (consisting of multiple slats S) can be removed. The assembly method for the drive shaft structure of the shutter in this embodiment comprises the steps of preparing a drive shaft assembly 3 (consisting of a main body 30 and a shaft 31 protruding from the main body 30) and fixing the main body 30 to the bearing 2 on the face 10 of the bracket 1; preparing a cylindrical rotating body 4 (consisting of a hollow cylindrical main body 40 that is open at the base end and has an end face at the tip end, a sprocket 41 arranged around the base end of the main body 40, an insertion portion 43 formed on the end face 42, and an engagement piece 44 protruding from the end face 42); fitting the main body 30 of the drive shaft assembly 3 inside the main body 40 and supporting it so that it can rotate freely by the shaft 31 through which the insertion portion 43 is inserted; connecting the sprocket 41 of the cylindrical rotating body 4 to a sprocket 60 of the opening / closing mechanism 6 fixed to the drive side bracket with a chain C; and engaging the engagement piece 44 on the end face 42 of the cylindrical rotating body 4 with the engagement receiving portion 53 of the winding shaft 5.

[0044] [Note] a bracket provided with a bearing for the manual winding shaft; a drive shaft assembly including a main body portion fixed to the bearing and a shaft portion protruding from the main body portion; a rotating body around which sprockets are provided; It consists of The rotating body accommodates the main body and is rotatably supported on the shaft portion, and the rotating body is connected to a drive side end of the winding shaft. The shutter drive shaft structure The bearing has a pair of opposing raised pieces and a base, and is generally U-shaped in cross section, The main body is a hollow rectangular parallelepiped with an opening on the side opposite to the shaft, and is fixed to the bearing in a state where it covers the bearing. In one embodiment, the upper surface of the main body abuts against the upper ends of the opposing raised pieces of the bearing, and a pair of opposing side surfaces of the main body abut against or are close to the surfaces of the opposing raised pieces, and the pair of side surfaces and the pair of raised pieces are fixed by fixing means (e.g., through-hole screws). It should be noted that the drive bearing structure of the shutter described above is also employed in the drive bearing structures of the third and fourth embodiments described below.

[0045] [D] Third and Fourth Embodiments [D-1] Background A third embodiment will be described with reference to Figures 9 to 11, and a fourth embodiment will be described with reference to Figures 12 to 14. The third and fourth embodiments have the same basic configuration, except for the fixed position of the opening and closing device 6. In the third embodiment, the fixed position of the opening and closing device 6 is located outside (away from the frame) the shutter core (guide rail G), which is the elevator shaft for the shutter curtain, and in the fourth embodiment, the fixed position of the opening and closing device 6 is located inside (closer to the frame) the shutter core (guide rail G), which is the elevator shaft for the shutter curtain.

[0046] [D-2] Third embodiment A third embodiment will be described with reference to Figures 9 to 11. In the third embodiment, a bearing 2 formed on a surface portion 10 of an existing bracket 1 comprises a generally U-shaped portion 2a in a side view. Bent pieces 26, 27 are formed on the base end sides of a pair of vertical portions 22', 22' of the U-shaped portion 2a, and a bent piece 28 is formed on the base end side of a bottom portion 23', and the bearing 2 is fixed with screws in a state where the bent pieces 26, 27, 28 are in contact with the surface portion 10 of the bracket 1 (see Figure 22). An insertion hole for a screw (bolt) 34 is formed in the pair of vertical portions 22', 22'.

[0047] 15A is used in the third embodiment. The dimensions of the internal space of the main body 30 of the drive shaft assembly 3 are such that the bearing 2 (pair of vertical portions 22′, 22′ and bottom portion 23′) can be housed therein. When the main body 30 is placed over the bearing 2, the upper surface of the main body 30 (the inner surface of the third side surface 302) abuts against the upper ends of the pair of vertical portions 22′ of the bearing 2, the inner surfaces of the first side surface 300 and the second side surface 301 abut against or are close to the outer surfaces of the pair of vertical portions 22′, 22′, respectively. Opposing insertion holes formed in the pair of vertical portions 22′ of the bearing 2 and opposing insertion holes 306 formed in the main body 30 of the drive shaft assembly 3 are aligned, and the main body 30 of the drive shaft assembly 3 and the bearing 2 are fixed together by screws 34 that penetrate the first side surface 300, the second side surface 301 and the pair of vertical portions 22′, 22′.

[0048] The drive shaft assembly 3 fixed to the drive-side bracket comprises a main body 30 fixed to the face 10 of the bracket 1 and a shaft 31 protruding from the main body 30. The drive shaft assembly 3 is provided with a hollow cylindrical rotating body 4 that is open at its base end. A sprocket 41 is provided around the base end of the main body 40 of the cylindrical rotating body 4, and an insertion portion 43 through which the shaft 31 of the drive shaft assembly 3 is inserted is formed on an end face 42 of the main body 40 at its tip end. The main body 40 of the cylindrical rotating body 4 accommodates the main body 30 of the drive shaft assembly 3 and is rotatably supported by the shaft 31. A washer 45 is provided on the shaft 31 of the drive shaft assembly 3 so as to abut or be close to the end face 42 of the cylindrical rotating body 4, and a C-shaped retaining ring 46 is fitted in a groove 313 adjacent to the washer 45.

[0049] Two engagement pieces 44 protrude from an end surface 42 on the tip side of the cylindrical rotor 4, and the engagement pieces 44 engage with engagement receiving portions 53 on the drive-side end of the winding shaft 5, thereby connecting the cylindrical rotor 4 to the drive-side end of the winding shaft 5. The shaft portion 31 of the drive shaft assembly 3 has a first portion 310 that supports the cylindrical rotor 4, and a second portion 311 and a tip portion 312 that are inserted into the internal space of the inner cylindrical body 51, with the tip portion 312 abutting or adjacent to the inner circumferential surface of the inner cylindrical body 51. The sprocket 41 mounted around the cylindrical rotor 4 is power-transmittingly connected to a sprocket 60 of the opening / closing device 6 mounted on the drive-side bracket by a chain C, so that the cylindrical rotor 4 and the winding shaft 5 rotate together when the opening / closing device 6 is driven.

[0050] In the third embodiment, the opening / closing device 6 is attached to a predetermined portion of the face portion 10 of the drive-side bracket (the front end side of the bracket 1 protruding from the main body) via an opening / closing device attachment mechanism consisting of a first member 7 and a second member 8. In a side view, the first member 7 has a second vertical piece 72 rising from the front end (the side away from the main body) of the bottom piece 71, and the second member 8 has a second side 81 rising vertically from the rear end (the side closer to the main body) of the horizontal first side 80 (see FIG. 10). The first member 7 is fixed with screws 73 by abutting the first vertical piece 70 against a predetermined portion of the face portion 10 of the bracket 1, and with both longitudinal end portions of the first side 80 of the second member 8 placed on the bottom pieces 71 of the left and right first members 7, the elongated holes 82 in the drive-side end of the first side 80 of the second member 8 are aligned with the holes 710 in the bottom pieces 71 of the first member 7 and connected from below with screws 84, and the driven-side end of the first side 80 of the second member 8 is connected with screws 85 inserted from below into the holes 710 in the bottom pieces 71 of the first member 7. The opening and closing device 6 is fixed to the first member 7 and the second member 8 with screws 84 on the side closer to the drive-side bracket, and is fixed to the second member 8 with screws 86 (see FIG. 17 ) on the side farther from the drive-side bracket. The determination of the mounting position of the first member 7 in the third embodiment will be described later.

[0051] The left and right brackets of the manual shutter according to the third embodiment are connected by four angle bars 11 to 14, and the shutter case 15 has an upper surface 150, a front surface 151, and a lower surface 152 (see FIG. 10 showing the shutter case 15 after renovation). During renovation, the lower surface 152 is removed, leaving the left and right brackets 1 and bearings 2, and the manual shutter's winding structure and shutter curtain (consisting of multiple slats S) can be removed. The assembly method for the drive shaft structure of the shutter in this embodiment comprises the steps of preparing a drive shaft assembly 3 (consisting of a main body 30 and a shaft 31 protruding from the main body 30) and fixing the main body 30 to the bearing 2 on the face 10 of the bracket 1; preparing a cylindrical rotating body 4 (consisting of a hollow cylindrical main body 40 that is open at the base end and has an end face at the tip end, a sprocket 41 arranged around the base end of the main body 40, an insertion portion 43 formed on the end face 42, and an engagement piece 44 protruding from the end face 42); fitting the main body 30 of the drive shaft assembly 3 inside the main body 40 and supporting it so that it can rotate freely by the shaft 31 through which the insertion portion 43 is inserted; connecting the sprocket 41 of the cylindrical rotating body 4 to a sprocket 60 of the opening / closing mechanism 6 fixed to the drive side bracket with a chain C; and engaging the engagement piece 44 on the end face 42 of the cylindrical rotating body 4 with the engagement receiving portion 53 of the winding shaft 5.

[0052] [D-3] Fourth embodiment A fourth embodiment will be described with reference to Figures 12 to 14. In the fourth embodiment, a bearing 2 formed on a surface portion 10 of an existing bracket 1 comprises a generally U-shaped portion 2a in a side view. Bent pieces 26, 27 are formed on the base end sides of a pair of vertical portions 22', 22' of the U-shaped portion 2a, and a bent piece 28 is formed on the base end side of a bottom portion 23', and the bearing 2 is fixed with screws in a state where the bent pieces 26, 27, 28 are in contact with the surface portion 10 of the bracket 1 (see Figure 22). An insertion hole for a screw (bolt) 34 is formed in the pair of vertical portions 22', 22'.

[0053] 15A is used in the fourth embodiment. The dimensions of the internal space of the main body 30 of the drive shaft assembly 3 are such that the bearing 2 (pair of vertical portions 22′, 22′ and bottom portion 23′) can be housed therein. When the main body 30 is placed over the bearing 2, the upper surface of the main body 30 (the inner surface of the third side surface 302) abuts against the upper ends of the pair of vertical portions 22′ of the bearing 2, the inner surfaces of the first side surface 300 and the second side surface 301 abut against or are close to the outer surfaces of the pair of vertical portions 22′, 22′, respectively. Opposing insertion holes formed in the pair of vertical portions 22′ of the bearing 2 and opposing insertion holes 306 formed in the main body 30 of the drive shaft assembly 3 are aligned, and the main body 30 of the drive shaft assembly 3 and the bearing 2 are fixed by screws 34 that penetrate the first side surface 300, the second side surface 301 and the pair of vertical portions 22′, 22′.

[0054] The drive shaft assembly 3 fixed to the drive-side bracket comprises a main body 30 fixed to the face 10 of the bracket 1 and a shaft 31 protruding from the main body 30. The drive shaft assembly 3 is provided with a hollow cylindrical rotating body 4 that is open at its base end. A sprocket 41 is provided around the base end of the main body 40 of the cylindrical rotating body 4, and an insertion portion 43 through which the shaft 31 of the drive shaft assembly 3 is inserted is formed on an end face 42 of the main body 40 at its tip end. The main body 40 of the cylindrical rotating body 4 accommodates the main body 30 of the drive shaft assembly 3 and is rotatably supported by the shaft 31. A washer 45 is provided on the shaft 31 of the drive shaft assembly 3 so as to abut or be close to the end face 42 of the cylindrical rotating body 4, and a C-shaped retaining ring 46 is fitted in a groove 313 adjacent to the washer 45.

[0055] Two engagement pieces 44 protrude from an end surface 42 on the tip side of the cylindrical rotor 4, and the engagement pieces 44 engage with engagement receiving portions 53 on the drive-side end of the winding shaft 5, thereby connecting the cylindrical rotor 4 to the drive-side end of the winding shaft 5. The shaft portion 31 of the drive shaft assembly 3 has a first portion 310 that supports the cylindrical rotor 4, and a second portion 311 and a tip portion 312 that are inserted into the internal space of the inner cylindrical body 51, with the tip portion 312 abutting or adjacent to the inner circumferential surface of the inner cylindrical body 51. The sprocket 41 mounted around the cylindrical rotor 4 is power-transmittingly connected to a sprocket 60 of the opening / closing device 6 mounted on the drive-side bracket by a chain C, so that the cylindrical rotor 4 and the winding shaft 5 rotate together when the opening / closing device 6 is driven.

[0056] In the fourth embodiment, the opening / closing device 6 is attached to a predetermined portion of the face portion 10 of the drive-side bracket (the base end side of the bracket 1 protruding from the main body) via an opening / closing device attachment mechanism consisting of a first member 7 and a second member 8. In a side view, the first member 7 has a second vertical piece 72 rising from the front end (the side farther from the main body) of the bottom piece 71, and the second member 8 has a first side 80 rising vertically from the front end (the side farther from the main body) of a horizontal second side 81 (see FIG. 13). The first member 7 has the first vertical piece 70 abutted against a predetermined portion of the face portion 10 of the bracket 1 and fixed with screws 73, and both longitudinal end portions of the second side 81 of the second member 8 are overlapped and abutted against the second vertical pieces 72 of the left and right first members 7, and the long holes 82 in the drive-side end of the first side 80 of the second member 8 are aligned with the holes 720 in the second vertical pieces 72 of the first member 7 to connect them from the front with screws 84, and the driven-side end of the first side 80 of the second member 8 is connected with screws 85 inserted from the front into the holes 720 in the second vertical pieces 72 of the first member 7. The opening and closing device 6 is fixed to the first member 7 and the second member 8 with screws 84 on the side closer to the drive-side bracket, and is fixed to the second member 8 with screws 86 (see FIG. 17 ) on the side farther from the drive-side bracket. The determination of the mounting position of the first member 7 in the fourth embodiment will be described later.

[0057] The left and right brackets of the manual shutter according to the fourth embodiment are connected by four angle bars 11 to 14, and the shutter case 15 has an upper surface portion 150, a front surface portion 151, and a lower surface portion 152 (see FIG. 13 showing the shutter case 15 after renovation). During renovation, the lower surface portion 152 is removed, leaving the left and right brackets 1 and bearings 2, and the winding structure of the manual shutter and the shutter curtain (consisting of multiple slats S) can be removed. The assembly method for the drive shaft structure of the shutter in this embodiment comprises the steps of preparing a drive shaft assembly 3 (consisting of a main body 30 and a shaft 31 protruding from the main body 30) and fixing the main body 30 to the bearing 2 on the face 10 of the bracket 1; preparing a cylindrical rotating body 4 (consisting of a hollow cylindrical main body 40 that is open at the base end and has an end face at the tip end, a sprocket 41 arranged around the base end of the main body 40, an insertion portion 43 formed on the end face 42, and an engagement piece 44 protruding from the end face 42); fitting the main body 30 of the drive shaft assembly 3 inside the main body 40 and supporting it so that it can rotate freely by the shaft 31 through which the insertion portion 43 is inserted; connecting the sprocket 41 of the cylindrical rotating body 4 to a sprocket 60 of the opening / closing mechanism 6 fixed to the drive side bracket with a chain C; and engaging the engagement piece 44 on the end face 42 of the cylindrical rotating body 4 with the engagement receiving portion 53 of the winding shaft 5. In the fourth embodiment, the chain C extends through a gap 74 between the base end edge of the second vertical piece 72 and the first vertical piece 70 .

[0058] [D-4] Positioning jig When a manual shutter is motorized using an operator 6, the sprocket 41 of the cylindrical rotor 4 and the output shaft (sprocket 60) of the operator 6 must be installed with a precise distance between them. In this embodiment, the installation position of the operator 6 is determined by the installation position of the first member 7, so it is important to install the first member 7 accurately. In this embodiment, the first member 7 is attached to the face 10 of the bracket 1 with five screws 73. To install the first member 7 to the face 10 of the bracket 1, screw holes for fixing the screws 73 must be formed in the face 10 of the bracket 1. Since the face 10 of the bracket 1 of an existing manual shutter does not have holes drilled, positioning on-site is difficult. Furthermore, depending on the installation location of the operator 6, the operator 6 may be installed inside or outside the shutter curtain due to space limitations within the shutter case 15. In each case, precise positioning of the first member 7 is required.

[0059] In this embodiment, a positioning jig 9 is used to determine the mounting position of the first member 7. By determining the positions of multiple (for example, three) holes that can form the vertices of a triangle, it is possible to determine the positions of all holes (mounting positions of the first vertical pieces 70 of the first member 7), and therefore in this embodiment, a positioning jig 9 is used to determine the positions of three holes.

[0060] The positioning jig 9 has contact portions 90 and 91 formed on the edges formed by cutting out both ends of a horizontally rectangular plate in a predetermined shape in the width direction, and a positioning portion 92 consisting of three holes is formed on the surface of the plate at a position spaced from the contact portion 90, and a positioning portion 93 consisting of three holes is formed at a position spaced from the contact portion 91. In this embodiment, the contacted portions are the edges of the left and right bent pieces 26 and 27 and the lower bent piece 28 of the bearing 2, and the positions of the three holes of the positioning portion 92 and the positioning portion 93 are determined by contacting the contact portions 90 and 91 of the positioning jig 9 to parts of the bearing 2.

[0061] The positioning jig 9 according to this embodiment includes a first positioning set consisting of a first contact portion 90 and a first positioning portion 92, and a second positioning set consisting of a second contact portion 91 and a second positioning portion 93. The first contact portion 90 and the second positioning portion 93 are located on a first side (the right side in the embodiment of FIG. 21) of the positioning jig 9, and the second contact portion 91 and the first positioning portion 92 are located on a second side (the left side in the embodiment of FIG. 21) of the positioning jig. The positioning jig 9 also includes an inclined edge 94 as a mark for determining the orientation of the positioning jig 9 during alignment.

[0062] The positioning jig 9 abuts the abutting portion 90 against the portion of the bearing 2 fixed to the face 10 of the bracket 1 as the abutted portion, thereby determining the posture and position of the positioning jig 9 on the face 10 of the bracket 1 and assuming the positioning posture, and the positioning portion 92 determines the positions of the three mounting holes on the face 10 of the bracket 1. The positioning jig 9 abuts the abutting portion 91 against the portion of the bearing 2 fixed to the face 10 of the bracket 1 as the abutted portion, thereby determining the posture and position of the positioning jig 9 on the face 10 of the bracket 1 and assuming the positioning posture, and the positioning portion 93 determines the positions of the three mounting holes on the face 10 of the bracket 1.

[0063] The contact portion 90 has a plurality of sides that contact the contacted portion. The contact portion 90 is made up of a first vertical side 900, a first horizontal side 901 that extends horizontally from the bottom end of the first vertical side 900, a second vertical side 902 that hangs down from the first horizontal side 901, and a second horizontal side 903 that extends horizontally from the bottom end of the second vertical side 902. As shown in the upper diagram of Figure 22, the positioning jig 9 determines the positioning posture by abutting the first vertical side 900 of the abutment portion 90 against the vertical edge of the first bent piece 26 of the bearing 2, the first horizontal side 901 against the horizontal lower edge of the first bent piece 26 of the bearing 2, the second vertical side 902 against the vertical side edge of the third bent piece 28, and the second horizontal side 903 against the horizontal lower edge of the third bent piece 28, and the position where the screw hole is to be formed is determined by marking the surface portion 10 of the bracket 1 from the three holes of the positioning portion 92.

[0064] The contact portion 91 has a plurality of sides that come into contact with the contacted portion. The contact portion 91 is made up of a first vertical side 910, a first horizontal side 911 that extends horizontally from the bottom end of the first vertical side 910, a second vertical side 912 that hangs down from the first horizontal side 911, and a second horizontal side 913 that extends horizontally from the bottom end of the second vertical side 912. As shown in the lower diagram of Figure 22, the positioning jig 9 abuts the first vertical side 910 of the abutment portion 91 against the vertical edge of the second bent piece 27 of the bearing 2, the first horizontal side 911 against the horizontal lower edge of the second bent piece 27 of the bearing 2, the second vertical side 912 against the vertical side edge of the third bent piece 28, and the second horizontal side 913 against the horizontal lower edge of the third bent piece 28, thereby determining the positioning posture, and the position where the screw hole is to be formed is determined by marking the surface portion 10 of the bracket 1 from the three holes of the positioning portion 93.

[0065] [Note] The opening / closing mechanism is configured by supporting a long second member between first members fixed to predetermined positions on the surfaces of the left and right brackets, The first member comprises a first vertical piece fixed in contact with the bracket surface, a bottom piece extending horizontally from the lower end of the first vertical piece, and a second vertical piece rising vertically from one end of the bottom piece in the width direction, and the bottom piece and the second vertical piece of the first member have holes formed therein for fixing a switchgear, and the bottom piece and the second vertical piece selectively serve as mounting pieces for the switchgear, A hole for fixing a switch is formed on one end side in the longitudinal direction of the second member, and the one end side of the switch is fixed by a fixing means in a state where the hole for fixing a switch is aligned with the hole for fixing a switch of the selected mounting piece. Switchgear mounting mechanism. In one aspect, the second member has an L-shaped cross section from the first side and the second side, and a hole for fixing an opening / closing device is formed on one end side of the length of the first side, and the second member is configured so that the first side is selectively set as a horizontal side or a vertical side to serve as an attachment side, and the hole for fixing an opening / closing device of the attachment side is aligned with the hole for fixing an opening / closing device of the selected attachment piece, and one end side of the opening / closing device is fixed with a fixing means. In one aspect, when the bottom piece is selected as the mounting piece and an opening / closing device is attached, the first edge of the second member is fixed from below by a fixing means with the first edge abutting the underside of the bottom piece as a horizontal edge. In one aspect, when the second vertical piece is selected as the mounting piece and an opening / closing device is attached, the first edge of the second member is fixed from the front by a fixing means with the first edge abutting the outer surface of the second vertical piece as a vertical edge. In one embodiment, the base end edge of the second vertical piece and the first vertical piece are spaced apart from each other, forming a gap when viewed from the front. The fastening means includes screws and rivets.

[0066] [Note] A positioning jig for determining the mounting hole position of the switchgear mounting base on the surface of the bracket, an abutting portion that abuts against an abutted portion that is an element fixed to a surface portion of the bracket or a part of the bracket; a mounting hole positioning portion; Equipped with When the abutting portion abuts against the abutted portion, the position of the positioning jig is determined to be a positioning position, and the position of a mounting hole on a surface portion of the bracket is determined by the positioning portion. Positioning jig. In one embodiment, the opening / closing machine comprises left and right first members fixed to left and right brackets, and a second member attached between the first members, and the opening / closing machine mounting base is the first member fixed to one of the brackets (the driving side bracket). In one embodiment, the positioning jig is a plate. In one embodiment, the contact portion has a plurality of sides that contact the contacted portion. In one embodiment, the abutted portion is a bearing fixed to a surface portion of the bracket. In one embodiment, the positioning portion is a plurality of holes. In one embodiment, the positioning jig comprises a first positioning set consisting of a first contact portion and a first positioning portion, and a second positioning set consisting of a second contact portion and a second positioning portion. In one embodiment, the first contact portion and the second positioning portion are located on a first side of the positioning jig, The second contact portion and the first positioning portion are located on a second side of the positioning jig. In one embodiment, the positioning jig includes a mark that determines the orientation of the positioning jig when aligned. [Explanation of symbols]

[0067] 1 bracket 2 bearings 20 First rising piece 21 Second rising piece 22 Vertical piece (rising piece) 23 Bottom piece 22´ Vertical section (rising piece) 23´ bottom 3 Drive shaft assembly 30 Main body 300 1st aspect 301 Second aspect 302 Third aspect 303 Fourth aspect 304, 305 Bent pieces 306 Insertion hole 31 Shaft 310 Part 1 311 Part 2 312 Tip 4 Cylindrical rotating body (rotating body) 40 Main Unit 41 sprocket 42 End face 43 Insertion part 44 Engagement piece 5 Winding shaft 53 Engagement receiving portion 6. Opening and closing mechanism 60 sprocket 7 First member 70 1st vertical piece 71 Bottom piece (mounting piece) 710 Hole for fixing the switch 72 Second vertical piece (mounting piece) 720 Hole for fixing the switch 74 Gap 8 Second member 80 First side (mounting side) 81 Second side (mounting side) 82 Hole for fixing the switch 83 Hole for fixing the switch 9 Positioning jig 90, 91 Contact part 92, 93 Positioning part (3 holes) 94 Inclined Edge (Mark)

Claims

1. a drive shaft assembly including a main body portion fixed to one of the existing left and right brackets and a shaft portion protruding from the main body portion; a hollow cylindrical rotor having an open base end; It consists of a sprocket is provided around the base end of the rotor, and an insertion portion through which the shaft portion is inserted is formed on an end surface of the tip end of the rotor; The rotating body accommodates the main body and is rotatably supported on the shaft portion, and the rotating body is connected to a drive side end of the winding shaft. Shutter drive shaft structure.

2. The shutter drive shaft structure according to claim 1 , wherein the rotating body is cylindrical.

3. The inner wall of the rotating body and the main body are spaced apart and in a non-contact state.

3. The shutter drive shaft structure according to claim 1 or 2.

4. A plurality of engagement pieces are protruding from the end surface of the tip side of the rotor, and are engaged with an engagement receiving portion of the drive side end of the winding shaft, An opening / closing mechanism is provided on the one bracket, The sprocket and the opening / closing device are connected by a chain. The shutter drive shaft structure according to claim 1.

5. The shaft portion of the drive shaft assembly includes a first portion that supports the rotating body and a second portion that protrudes from the rotating body, and the second portion supports a drive side end portion of the winding shaft. The shutter drive shaft structure according to claim 4.

6. A drive shaft assembly is prepared, which includes a main body and a shaft protruding from the main body, and the main body is fixed to one of the existing left and right brackets. a rotating body including a hollow cylindrical body having an open base end and an end face at a tip end, a sprocket provided around the base end of the body, an insertion portion formed on the end face, and an engagement piece protruding from the end face; the body portion of the drive shaft assembly is fitted inside the body, and is rotatably supported by the shaft portion that passes through the insertion portion; connecting the sprocket to an opening / closing device fixed to the one bracket with a chain; Engaging the engagement piece on the end surface of the rotating body with a winding shaft; A method for assembling a shutter drive shaft structure comprising:

Images