Door opening / closing device of elevator car and elevator

Abstract

To provide a door opening / closing device of an elevator car and an elevator capable of reducing countermeasures for various components damages and so on in a car door opening / closing device during an installing work of the car door opening / closing device.SOLUTION: A support frame 4 comprises a pair of brackets 50, 50 spaced apart in the left-right direction at the rear face. The pair of brackets 50, 50 comprises a body part 500 attached to the support frame 4 and a rear protrusion 501 protruding rearward from the top of the body part 500. The structure configured by grounding the bottom edge 50a of the body part 500 and the tip 50b of the rear protrusion 501 functions as a pedestal of the support frame 4. As a result, the damages and so on of the various components on the support frame 4 are prevented.SELECTED DRAWING: Figure 20

Description

[Technical Field]

[0001] The present invention relates to an elevator car door opening and closing device and an elevator. [Background technology]

[0002] A known example of this type of car door opening and closing device is one that includes: i) a door rail that supports the car door so that it can slide left and right; ii) a drive motor; iii) first and second pulleys that are provided above the door rail at a distance left and right and around which a drive belt that is operatively connected to the car door is wound; and iv) a plate-shaped support frame that supports the door rail, the drive motor, and the first and second pulleys (Patent Document 1).

[0003] Patent Document 1 discloses two types of car door opening and closing devices. One type of car door opening and closing device is shown in Figures 1 and 2. In this type, the first pulley is a speed reduction pulley to which rotation is transmitted from a drive motor via a speed reduction belt, the drive motor is disposed in an open space above a support frame, and the first pulley and second pulley are disposed in front of the support frame.

[0004] Another form of car door opening and closing device is shown in Figures 3 and 4. In this form, the first pulley is directly connected to the drive motor, and the drive motor, the first pulley, and the second pulley are arranged on the front surface of the support frame. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2011-514298 Summary of the Invention [Problem to be solved by the invention]

[0006] These car door opening and closing devices are assembled in a factory or at the elevator installation site. That is, first, the drive motor, first pulley, and second pulley are attached to the support frame, and an integrated structure of the door rail, drive motor, first pulley, second pulley, and support frame is constructed. Next, this integrated structure (if constructed in a factory, it is transported to the installation site) is lifted by a lifting means such as a crane and attached to the upper front surface of the car using fixing devices.

[0007] During this installation work, the integrated structure may be temporarily placed on the building floor from the rear side of the support frame before being lifted. In this case, care must be taken to insert and position a pedestal such as a batten between the support frame and the floor to prevent damage to the various components, such as the door rail, drive motor, first pulley, and second pulley.

[0008] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an elevator car door opening and closing device and an elevator that can reduce the need to worry about damage to various components of the car door opening and closing device during installation work. [Means for solving the problem]

[0009] The elevator car door opening and closing device according to the present invention comprises: a door rail that supports the car door so that the car door can slide left and right; A drive motor; a first pulley and a second pulley provided above the door rail and spaced apart in the left-right direction, around which a drive belt is wound and which is operatively connected to the car door; A door rail is provided on the front surface, and a support frame is provided to support the drive motor, the first pulley, and the second pulley. The support frame has a pair of brackets spaced apart on the rear side in the left-right direction, Each of the pair of brackets is a main body portion attached to a support frame; a rearward protruding portion protruding rearward from an upper portion of the main body portion, The bottom end of the main body and the tip of the rear protrusion are grounded to function as a base for the support frame. This is an elevator car door opening and closing device.

[0010] In addition, as one aspect of the elevator car door opening and closing device according to the present invention, The first pulley is directly connected to the drive motor, The drive motor, the first pulley, and the second pulley are disposed in an open space above the support frame and are attached to the support frame via a bracket. The above configuration can be adopted.

[0011] In addition, as one aspect of the elevator car according to the present invention, Each of the pair of brackets has a vertical length that is longer than the vertical length of the support frame. The above configuration can be adopted.

[0012] In addition, as one aspect of the elevator car according to the present invention, Each of the pair of brackets is attached to the support frame so that its position can be changed in the vertical direction. The above configuration can be adopted.

[0013] In addition, as one aspect of the elevator car according to the present invention, Each of the pair of brackets is attached to the support frame using a fastener; Fixtures are bolt and nut fasteners, Each of the pair of brackets has a vertically long slide slot as an insertion hole for the bolt shaft. The above configuration can be adopted.

[0014] In addition, as one aspect of the elevator car according to the present invention, Each of the pair of brackets has an engagement portion for a lifting device at a location on the rear protruding portion, the location being rearward of the center of gravity of the integrated structure of the door rail, the drive motor, the first pulley, the second pulley, and the support frame. The above configuration can be adopted.

[0015] Further, the elevator according to the present invention is The elevator car door opening and closing device is provided It's an elevator. [Effects of the Invention]

[0016] According to the present invention, the bracket functions as a base for the support frame by grounding the lower end of the main body and the tip of the rearward protruding portion to the floor of a building, etc. Therefore, according to the present invention, it is possible to reduce the need to worry about damage to various components of the car door opening and closing device during installation work for the car door opening and closing device. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of an elevator. [Figure 2] Fig. 2(a) is a front view of the car with the car door closed, as viewed from the landing side, and Fig. 2(b) is a front view of the car with the car door open. [Figure 3] FIG. 3 is a front view of the upper part of the car with the car doors closed. [Figure 4] FIG. 4 is a front view of the upper part of the car with the car doors open. [Figure 5] Fig. 5(a) is a cross-sectional view taken along line A in Fig. 3. Fig. 5(b) is a cross-sectional view taken along line B in Fig. 3. [Figure 6] Fig. 6(a) is a front view of the upper part of the car with the car door removed. Fig. 6(b) is a cross-sectional view taken along line C in Fig. 6(a). Fig. 6(c) is a cross-sectional view taken along line C in Fig. 6(a). Fig. 6(d) is an explanatory view of another example of Fig. 6(c). [Figure 7]Fig. 7(a) is a front view of part D in Fig. 6(a), and Fig. 7(b) is an exploded view of Fig. 7(a). [Figure 8] Figure 8(a) is a side view of Figure 7(a), and Figure 8(b) is an exploded view of Figure 8(a). [Figure 9] Fig. 9(a) is a front view of part E in Fig. 6(a), and Fig. 9(b) is an exploded view of Fig. 9(a). [Figure 10] Figure 10(a) is a side view of Figure 9(a), and Figure 10(b) is an exploded view of Figure 10(a). [Figure 11] Fig. 11(a) is a front view of part F in Fig. 6(a), and Fig. 11(b) is an exploded view of Fig. 11(a). [Figure 12] Figure 12(a) is a side view of a portion of Figure 11(a), and Figure 12(b) is an exploded view of Figure 12(a). [Figure 13] Figure 13(a) is a side view of another part of Figure 11(a), and Figure 13(b) is an exploded view of Figure 13(a). [Figure 14] Figure 14(a) is a front view of part G in Figure 6(a), and Figure 14(b) is an exploded view of Figure 14(a). [Figure 15] FIG. 15 is a front view of part H in FIG. 6(a). [Figure 16] FIG. 16 is a side view of FIG. [Figure 17] FIG. 17 is a front view of the integrated structure with the various components attached to the support frame. [Figure 18] Figure 18(a) is a front view of part I in Figure 17. Figure 18(b) is an exploded view of Figure 18(a). [Figure 19] Figure 19(a) is a side view of Figure 18(a), and Figure 19(b) is an exploded view of Figure 19(a). [Figure 20] 20(a) to 20(d) are explanatory diagrams showing the use of the bracket as a base. [Figure 21] FIG. 21 is an explanatory diagram of the installation work. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of an elevator according to the present invention will be described.

[0019] In the following, when a person standing on a floor looks at the car (as shown in Figure 2), the left side is referred to as "left," the right side as "right," the horizontal direction between left and right is referred to as the "left-right direction," and the left-right direction is indicated as X in the appropriate diagrams. Also, when a person standing on a floor looks at the car (as shown in Figure 2), the side closer to the person is referred to as "front," the side farther from the person is referred to as "rear" or "rear," the horizontal direction between front and back is referred to as the "front-to-back direction," and the front-to-back direction is indicated as Y in the appropriate diagrams. The left-to-right direction and the front-to-back direction are two directions that intersect at right angles on a horizontal plane.

[0020] The up-down direction is synonymous with the vertical direction and is a direction perpendicular to the left-right direction and the front-rear direction.

[0021] As shown in Figure 1, elevator 1 includes hoistway 2 and car 3. Hoistway 2 extends vertically in a building with multiple floors. Car 3 moves up and down in hoistway 2 by being driven by a drive mechanism, and stops at a designated floor by stopping the drive mechanism.

[0022] The car 3 is equipped with a car door device 30. The car door device 30 is equipped with a car door 31, a door support structure 32, and a door opening and closing device 35. The car door 31 moves left and right to open and close an opening (car entrance / exit) on the front of the car 3, allowing passengers to get on and off. The door support structure 32 is a structure that supports the car door 31 while enabling the car door 31 to open and close. The door opening and closing device 35 is a device for opening and closing the car door 31.

[0023] In contrast, the landing 20 on each floor includes a jamb 21 and a landing door device 22. The jamb 21 is formed on a wall surface, and the interior of the frame forms an opening of a size corresponding to the opening of the car 3. The landing door device 22 includes a landing door 23 and a door support structure 24. The landing door 23 moves left and right to open and close the opening (landing entrance / exit) in the jamb 21, allowing passengers to get on and off. The landing door 23 is normally closed by being biased by an elastic force, and is opened following the opening operation of the car door 31 of the car 3 stopped at the floor, and is closed in conjunction with the closing operation of the car door 31. The door support structure 24 is a structure that supports the landing door 23 while enabling the opening and closing operation of the landing door 23.

[0024] As shown in Fig. 2, the car door 31 includes a door panel 310 and a door hanger 311. The door panel 310 is arranged along a vertical plane and is the main part of the car door 31 that opens and closes the opening 3a of the car 3. The door hanger 311 is attached integrally with the door panel 310 at the upper end of the door panel 310. The door hanger 311 includes a pair of rollers 312, 312. The pair of rollers 312, 312 are provided at the upper end of the door hanger 311 with a gap between them in the left-right direction.

[0025] The door support structure 32 includes a door rail 33 and a threshold 34. The door rail 33 is a straight, horizontally elongated, flat, rectangular, plate-like member. The door rail 33 is provided in the horizontal direction on the upper front surface of the car 3 along the upper edge of the opening 3a of the car 3, with both ends extending laterally beyond the upper edge of the opening 3a. The rollers 312, 312 of the door hanger 311 engage with the upper edge of the door rail 33 from above and rotate, so that the car door 31 is hung from the door rail 33 in a state in which it can slide laterally along the door rail 33. The door rail 33 is a structure that supports the upper portion of the car door 31 while enabling the car door 31 to open and close. On the other hand, the threshold 34 is provided in the horizontal direction on the lower front surface of the car 3 along the lower edge of the opening 3a of the car 3, with both ends extending laterally beyond the lower edge of the opening 3a. The threshold 34 is a structure that supports the lower part of the car door 31 while allowing the car door 31 to open and close.

[0026] As shown in Figures 3 and 4, the door opening and closing device 35 includes a drive motor 350, a drive pulley 351, a driven pulley 352, and a drive belt 353. The drive motor 350 is provided at one end, either left or right, of the upper front surface of the car 3. The drive pulley 351 is provided coaxially with and integral with the drive shaft of the drive motor 350, and is directly connected to the drive motor 350. The driven pulley 352 is provided at the other end, either left or right, of the upper front surface of the car 3. The drive belt 353 is an endless belt wound around the drive pulley 351 and the driven pulley 352. The drive belt 353 is provided in the left-right direction and parallel to the door rail 33.

[0027] When the drive motor 350 is driven, the drive pulley 351 rotates, and accordingly, the drive belt 353 moves in a circular motion. As a result, the two left and right car doors 31, 31 (hatched portions) reciprocate along the door rail 33 (hatched portions) and perform opening and closing operations. One car door 31 is connected to one side of the drive belt 353. The other car door 31 is connected to the other side of the drive belt 353. As a result, the pair of car doors 31, 31 move in directions opposite to each other. In other words, the car door device 30 and the landing door device 22 are of a center-open type in which the opening 3a of the car 3 opens from the center.

[0028] Here, the connection structure between the car door 31 and the drive belt 353 will be described in detail. The door hanger 311 of the car door 31 is composed of a pair of first and second members. The pair of first and second members are plate-shaped members. The pair of first members are provided at a distance from each other in the left-right direction, and each is attached integrally to the upper end of the door panel 310. The second member connects the pair of first members. In one car door 31, the door hanger 311 has an extension portion 311a that extends upward. In the other car door 31, the door hanger 311 has an extension portion 311b that extends upward. The extension portions 311a, 311b are formed in the left or right half of the first member, divided along the center line in the left-right direction. The first member is manufactured by cutting the entire mold from a single plate material. Therefore, the extensions 311a and 311b are parts of the main body of the first member that extend and protrude upward, and are provided integrally with the main body.

[0029] As shown in Fig. 5, the upper ends of the extensions 311a and 311b are bent. The bent portions are portions that protrude rearward (or forward) and are disposed along a horizontal plane. One side of the drive belt 353 is fixed using a fixture while contacting the lower surface (or upper surface) of the bent portion of the extension 311a. The other side of the drive belt 353 is fixed using a fixture while contacting the upper surface (or lower surface) of the bent portion of the extension 311b.

[0030] The roller 312 is rotatably attached to the inner surface of the door hanger 311 (first member thereof). The roller 313 is rotatably attached to the inner surface of the door hanger 311 (second member thereof). The roller 312 contacts the upper edge of the door rail 33. The roller 313 contacts the lower edge of the door rail 33. The door rail 33 is attached to the front surface of the support frame 4 via legs 33a. The door rail 33 is provided in front of the support frame 4 and parallel to the support frame 4. The legs 33a are cylindrical members, and a plurality of them are provided at appropriate intervals in the left-right direction and attached to the front surface of the support frame 4.

[0031] In one car door 31, a switch operating body 314 is attached to the inner surface of (a first member of) the door hanger 311. The switch operating body 314 has a roller, and turns on the switch 354 when the car door 31 is in the closed state. In the other car door 31, the extension portion 311b (the bent portion of) the door hanger 311 has a detection piece 311c. The detection piece 311c is a detection piece for the limit switches 355, 356.

[0032] As shown in FIG. 6, the support frame 4 is a straight, horizontally elongated, flat, rectangular, plate-like member. The support frame 4 is provided in the horizontal direction on the upper front surface of the car 3 along the upper edge of the opening 3a of the car 3, with both ends extending laterally beyond the upper edge of the opening 3a. The support frame 4 is a member for mounting and supporting various components, which will be described later. The support frame 4 is rigid enough not to be easily deformed, and is a metal member made of, for example, iron, steel, stainless steel, or aluminum.

[0033] The support frame 4 includes a main body 40 and a forward protrusion 41. The main body 40 occupies the majority of the entire support frame 4, is straight, elongated in the left-right direction, flat, rectangular, plate-like, and is disposed along a vertical plane. The forward protrusion 41 is a portion that protrudes forward from the upper edge of the main body 40, is straight, elongated in the left-right direction, flat, rectangular, plate-like, and is disposed along a horizontal plane. The forward protrusion 41 has an upper surface 41a. The upper surface 41a is a horizontal surface. The main body 40 and the forward protrusion 41 are integrally formed. As an example, the main body 40 and the forward protrusion 41 are formed by bending the upper end of a single plate material forward.

[0034] The support frame 4 has a smaller height than conventional support frames, so that the upper edge of the support frame 4 (the upper edge of the main body 40 and the edge relating to the upper surface 41a of the forward protrusion 41; hereinafter, this also applies when referred to as the "upper edge of the support frame") is located at a height difference H lower than the top of the roller 312.

[0035] The support frame 4 is attached to the upper front surface of the car 3. As an example, the support frame 4 is attached to the upper front surface of the car 3 via a bracket 50 and an appropriate bracket 50A (FIG. 6(c)). The upper front surface of the car 3 has a recess 3b recessed in the depth direction, and the support frame 4 is disposed in front of the recess 3b. As a result, the support frame 4 faces the rear surface of the recess 3b with a gap between them, and an open space S is formed above the support frame 4. The open space S is the space between the front offset surface and the rear offset surface based on the vertical plane of the support frame 4 (main body 40 thereof). The open space S is a space for arranging various components, which will be described later. The brackets 50 are attached to both ends of the support frame 4. The bracket 50A is connected to the bracket 50 and attached to the outer surface of the car 3. As a result, the support frame 4 is fixed to the upper front surface of the car 3. The brackets 50, 50A are members made of metal, such as iron, steel, stainless steel, or aluminum, that have sufficient rigidity to not easily deform.

[0036] As another example, the support frame 4 is attached to the upper front surface of the car 3 via the front frame 3A of the car 3 (FIG. 6(d)). A pair of front frames 3A are provided on both sides of the car 3, and the support frame 4 is arranged across the pair of front frames 3A, 3A. As a result, the support frame 4 faces the front surface of the car 3 with a gap between them, and a similar open space S is formed above the support frame 4. The support frame 4 is attached to the pair of front frames 3A, 3A at both ends. As a result, the support frame 4 is fixed to the upper front surface of the car 3.

[0037] The various components of the door opening and closing device 35, such as the drive motor 350 (and drive pulley 351), driven pulley 352, switch 354, and limit switches 355 and 356, are attached to appropriate locations on the support frame 4. A control box 37, another component, is also attached to an appropriate location on the support frame 4. These various components are attached to the support frame 4 via brackets. The brackets are provided at multiple locations on the upper edge of the support frame 4 and extend upward, backward, or forward from the upper edge of the support frame 4. This allows the various components to be arranged in the open space S. The brackets supporting the switch 354 and limit switches 355 and 356 are positioned between the bracket supporting the drive motor 350 (and drive pulley 351) and the bracket supporting the driven pulley 352, but are naturally arranged so as not to interfere with the drive belt 353. The brackets are made of a metal having sufficient rigidity to resist deformation, such as iron, steel, stainless steel, or aluminum.

[0038] As shown in Figures 7 and 8, a bracket 51 that supports the drive motor 350 and the drive pulley 351 is attached to the rear surface (back surface) of the support frame 4 (the main body 40 thereof). The bracket 51 is detachably attached to the support frame 4 (the main body 40 thereof) using a fastener 61. The fastener 61 is a bolt and nut fastener. The fastener 61 is a combination of two bolts 610, 610 and one plate nut (two nuts welded to a plate) 611 (including appropriate washers, spring washers, etc., as necessary). The support frame 4 (the main body 40 thereof) (the upper end portion) has a round hole as an insertion hole for the shank of the bolt 610. The bracket 51 (the lower end portion) has a notched hole 51a that is open at the lower edge as an insertion hole for the shank of the bolt 610. The bolt 610 is inserted into the insertion holes of the support frame 4 and the bracket 51 from the front of the support frame 4 and is screwed into the plate nut 611. This allows the fixing device 61 to be fixed and released by rotating it from the front of the support frame 4. The insertion hole of the bracket 51 is a notched hole 51a. This allows the bracket 51 to be removed by pulling it up with the fixing device 61 loosened.

[0039] Bracket 51 is formed by bending a plate material. The bent portion is a portion that protrudes rearward and is disposed along a horizontal plane. The bent portion has an upper surface 51b. Upper surface 51b is a surface that is visible from the front of support frame 4 and is a horizontal plane. Bracket 51 is attached to support frame 4 so that upper surface 51b is close to upper surface 41a of (the forward protruding portion 41 of) support frame 4 and is at the same height (flush) as upper surface 41a.

[0040] The drive motor 350 has a base surface (lower surface) 350a, and is attached to the bracket 51 so that the base surface 350a contacts the upper edge of the support frame 4. The drive motor 350 is attached to the bracket 51 so that the base surface 350a contacts the upper surface 41a of the support frame 4 and the upper surface 51b of the bracket 51 across the bracket 51.

[0041] The drive motor 350 is attached to the bracket 51 so that its position can be adjusted in the front-rear direction (by the gap between the bolt shaft and the insertion hole). The drive motor 350 is attached to the bracket 51 so that the tip of the base surface 350a coincides with the tip of the upper surface 41a of the support frame 4.

[0042] As shown in Figures 9 and 10, the bracket 52 supporting the driven pulley 352 is attached to the rear surface of the support frame 4 (the main body 40 thereof). The bracket 52 is detachably attached to the support frame 4 (the main body 40 thereof) using a fastener 62. The fastener 62 is a bolt and nut fastener. The fastener 62 is a combination of two square root bolts 620, 620 and two nuts 621, 621 (including appropriate washers, spring washers, etc., as necessary). The (upper end of the) support frame 4 (the main body 40 thereof) has a square hole 42a as an insertion hole for the shank of the square root bolt 620. The (lower end of the) bracket 52 has a square hole 52a as an insertion hole for the shank of the square root bolt 620. The square root bolt 620 is inserted into the insertion hole of the bracket 52 and the support frame 4 from the rear of the support frame 4, and a nut 621 is screwed into it from the front of the support frame 4. As a result, the fixing device 62 can be fixed and released by rotating it from the front of the support frame 4. The square root portion of the square root bolt 620 fits into the square holes 42a, 52a. This restricts movement and rotation of the bracket 52 relative to the support frame 4 in a vertical plane.

[0043] The bracket 52 is formed using a plate material. The driven pulley 352 is rotatably attached to the bracket 52. Although not shown, the driven pulley 352 is attached to the bracket 52 so that its position can be adjusted in the left-right direction. By adjusting the left-right position of the driven pulley 352, the tension of the drive belt 353 can be adjusted.

[0044] As shown in Figures 11 and 12, a bracket 54 that supports the switch 354 is attached to the rear surface of the support frame 4 (the main body 40 thereof). The bracket 54 is detachably attached to the support frame 4 (the main body 40 thereof) using a fastener 64. The fastener 64 is a bolt and nut fastener. The fastener 64 is a combination of two bolts 640, 640 and one plate nut 641 (including appropriate washers, spring washers, etc., as necessary). The support frame 4 (the main body 40 thereof) (the upper end) has an elongated hole 44a as an insertion hole for the shaft of the bolt 640. The bracket 54 (the lower end) has an elongated hole 54a as an insertion hole for the shaft of the bolt 640. The elongated hole 44a is an elongated hole that is long in either the left-right direction or the up-down direction (up-down direction in the illustrated example). The elongated hole 54a is an elongated hole that is long in either the left-right direction or the up-down direction (left-right direction in the illustrated example). The bolt 640 is inserted into the insertion hole of the support frame 4 and the bracket 54 from the front of the support frame 4 and is screwed into the plate nut 641. This allows the fixing device 64 to be fixed and released by rotating the support frame 4 from the front. The insertion holes of the support frame 4 and the bracket 54 are elongated holes 44a, 54a that are long in directions perpendicular to each other (left-right direction and up-down direction). This allows the position of the bracket 54 relative to the support frame 4 to be adjusted in the left-right direction and up-down direction.

[0045] The bracket 54 is formed by bending a plate material at multiple locations. The bracket 54 is formed so that the switch 354 is disposed behind the drive belt 353. The bent portion formed in the middle of the bracket 54 is a portion that protrudes rearward and is disposed along a horizontal plane. The bent portion has an upper surface 54b. The upper surface 54b is a surface that is visible from the front of the support frame 4 and is a horizontal plane. The bracket 54 is attached to the support frame 4 so that the upper surface 54b is close to the upper surface 41a of the support frame 4 (the forward protruding portion 41) and is at the same height (flush) as the upper surface 41a.

[0046] The switch 354 is attached to the bracket 54 so that its position can be adjusted in the front-to-rear and left-to-right directions (by the amount of the gap between the bolt shaft and the insertion hole). The vertical position of the switch 354 is adjusted by adjusting the vertical position of the bracket 54 so that the upper surface 54b of the bracket 54 is at the same height as the upper surface 41a of the support frame 4.

[0047] Switch 354 is a switch that detects whether car door 31 is in the closed position. Switch 354 includes switch piece 354a. Switch piece 354a is provided to be swingable on the underside of the main body of switch 354, and when car door 31 is in the closed state, switch operating body 314 of car door 31 abuts against switch piece 354a, thereby being pushed up and turning switch 354 ON. Switch 354 is in the form of an interlock switch that constitutes part of the safety circuit of the drive device of elevator 1.

[0048] As shown in Figures 11 and 13, a bracket 55 supporting the limit switch 355 is attached to the rear surface of the support frame 4 (the main body 40 thereof). The bracket 55 is detachably attached to the support frame 4 (the main body 40 thereof) using a fastener 65. The fastener 65 is a bolt and nut fastener. The fastener 65 is a combination of two bolts 650, 650 and one plate nut 651 (including appropriate washers, spring washers, etc., as necessary). The support frame 4 (the main body 40 thereof) (the upper end portion) has an elongated hole 45a as an insertion hole for the shaft portion of the bolt 650. The bracket 55 (the lower end portion) has an elongated hole 55a as an insertion hole for the shaft portion of the bolt 650. The elongated hole 45a is an elongated hole that is long in either the left-right direction or the up-down direction (up-down direction in the illustrated example). The elongated hole 55a is an elongated hole that is long in either the left-right direction or the up-down direction (left-right direction in the illustrated example). The bolt 650 is inserted into the insertion hole of the support frame 4 and the bracket 55 from the front of the support frame 4 and is screwed into the plate nut 651. This allows the fixing device 65 to be fixed and released by rotating the support frame 4 from the front. The insertion holes of the support frame 4 and the bracket 55 are elongated holes 45a, 55a that are long in directions perpendicular to each other (left-right direction and up-down direction). This allows the position of the bracket 55 relative to the support frame 4 to be adjusted in the left-right direction and up-down direction.

[0049] Bracket 55 is formed by bending a plate material at multiple locations. The bent portion formed in the middle of bracket 55 is a portion that protrudes rearward and is disposed along a horizontal plane. The bent portion has an upper surface 55b. Upper surface 55b is a surface that is visible from the front of support frame 4 and is a horizontal plane. Bracket 55 is attached to support frame 4 so that upper surface 55b is close to upper surface 41a of support frame 4 (forward protruding portion 41) and is at the same height (flush) as upper surface 41a.

[0050] The limit switch 355 is attached to the bracket 55 so that its position can be adjusted in the front-to-rear and left-to-right directions (by the amount of the gap between the shaft of a bolt (not shown) and the insertion hole). The vertical position of the limit switch 355 is adjusted by adjusting the vertical position of the bracket 55 so that the upper surface 55b of the bracket 55 is at the same height as the upper surface 41a of the support frame 4.

[0051] The limit switch 355 is a switch that detects whether the car door 31 is in the closed position. As an example, the limit switch 355 is a proximity sensor. Note that the role of the limit switch 355 can also be performed by the switch 354, so it is possible to eliminate the limit switch 355.

[0052] As shown in Figure 14, limit switch 356 is a switch that detects when car door 31 is in the open position. The limit switch 356, the bracket 56 that supports limit switch 356, the fixture 66, and the fixing structure are substantially the same as, but arranged in a line-symmetrical relationship with, the limit switch 355, the bracket 55, the fixture 65, and the fixing structure shown in Figures 11 and 13. Therefore, a description of the configuration will be omitted as it is the same.

[0053] As shown in Figures 15 and 16, a bracket 57 that supports the control box 37 is attached to the rear surface of (the main body 40 of) the support frame 4. The bracket 57 is detachably attached to (the main body 40 of) the support frame 4 using a fastener 67. The fastener 67 is two bolts 670, 670 (including appropriate washers, spring washers, etc., as necessary). The (upper end of) the support frame 4 (the main body 40) has a round hole as an insertion hole for the shaft of the bolt 670. The (lower end of) the bracket 57 has a screw hole 57a for the bolt 670. The bolt 670 is inserted into the insertion hole of the support frame 4 from the front of the support frame 4 and screws into the screw hole 57a. As a result, the fastener 67 can be fixed and released by rotating the support frame 4 from the front.

[0054] The control box 37 houses a sub-controller for the control unit (main control unit) of the entire elevator 1. Alternatively, the control box 37 houses a relay unit for the control unit of the entire elevator 1. The control box 37 may not be provided on the support frame 4.

[0055] 17 shows an integrated structure (hereinafter simply referred to as "integrated structure") of the door rail 33, drive motor 350, drive pulley 351, driven pulley 352, switches 354 to 356, and support frame 4, to which everything except the control box 37 has been attached. This integrated structure is an intermediate product in the installation work, as explained in the section [Problem to be solved by the invention].

[0056] The integrated structure (support frame 4) is provided with a pair of brackets 50, 50 spaced apart in the left-right direction on the rear surface. As an example, the brackets 50 are disposed at each end of the support frame 4. These brackets 50 are the same as those explained in the explanation using FIG. 6.

[0057] As shown in FIGS. 18 and 19 , the bracket 50 includes a main body 500 and a rearward protruding portion 501. The main body 500 is a straight, flat, rectangular, plate-like portion that is disposed along a vertical plane. The rearward protruding portion 501 is a portion that protrudes rearward from the upper edge of the main body 500, and is a straight, flat, rectangular, plate-like portion that is disposed along a horizontal plane. The main body 500 and the rearward protruding portion 501 are integrally formed. As an example, the main body 500 and the rearward protruding portion 501 are formed into an inverted L-shape by bending the upper part of a single plate material backward.

[0058] The bracket 50 (main body 500) has a vertical length H50 that is longer than the vertical length H4 of the support frame 4 (main body 40). As a result, the bracket 50 extends and protrudes downward from the lower edge of the support frame 4, and a lower end 50a of the bracket 50 (main body 500) is located at a height position below the lower edge of the support frame 4. In addition, the bracket 50 extends and protrudes upward from the upper edge of the support frame 4, and a tip 50b of the bracket 50 (rear protrusion 501) is located at a height position above the upper edge of the support frame 4.

[0059] The bracket 50 is attached to the rear surface of the support frame 4 (the main body 40 thereof). The bracket 50 is detachably attached to the support frame 4 (the main body 40 thereof) using a fastener 60. The fastener 60 is a bolt and nut fastener. The fastener 60 is a combination of two bolts 600, 600 and two nuts 601, 601 (including appropriate washers, spring washers, etc., as necessary). The (upper end of) the support frame 4 (the main body 40 thereof) has a through hole 40a as an insertion hole for the shank of the bolt 600. A plurality of through holes 40a are provided side by side in the left-right direction, and appropriate two through holes 40a, 40a are selected. The bracket 50 (the main body 500 thereof) has a slide elongated hole 500a that is long in the up-down direction as an insertion hole for the shank of the bolt 600. Two slide elongated holes 500a are provided side by side in the left-right direction. The two slide elongated holes 500a, 500a are arranged symmetrically about the center line of the width of (the main body 500 of) the bracket 50 in the left-right direction. Each of the two slide elongated holes 500a, 500a is formed to be longer than the length H4 of the support frame 4 in the up-down direction. The bolt 600 is inserted into the insertion holes of the support frame 4 and the bracket 50 from the front of the support frame 4 and is screwed into the nut 601. This allows the fixing device 60 to be fixed and released by rotating the support frame 4 from the front. The insertion hole of the bracket 50 is the slide elongated hole 500a. This allows the bracket 50 to be moved in the up-down direction and slid when the fixing device 60 is loosened.

[0060] Bracket 50 includes eyebolt 502 as an engaged portion for a lifting tool. Eyebolt 502 is provided at a location on rearward protruding portion 501, rearward of the center of gravity of the integrated structure. Eyebolt 502 is provided so as to protrude upward from the upper surface of rearward protruding portion 501.

[0061] The bracket 50 has a fixing device 60A at the end of the rear protruding portion 501. The fixing device 60A is a bolt and nut fastener, and is a combination of one bolt 600A and one nut 601A. The fixing device 60A is used to fix the bracket 50 and the bracket 50A together (FIG. 6(c)).

[0062] The (lower end of) the support frame 4 (main body 40) has a notched hole 40b that opens at the lower edge. A plurality of notched holes 40b are provided at appropriate intervals in the left-right direction over the entire length of the support frame 4. The notched holes 40b are used as insertion holes for the shank of a bolt 600A of a fixing device 60A to fix the support frame 4 to another bracket 50A (FIG. 6(c)).

[0063] The configuration of the elevator 1 according to this embodiment is as described above. According to the elevator 1 according to this embodiment, as shown in Fig. 20 , the bracket 50 grounds the lower end 50a of the main body 500 and the tip 50b of the rear protruding portion 501 on the floor of a building or the like, thereby raising the support frame 4 above the floor and functioning as a base for the support frame 4. Therefore, during installation work for the door opening and closing device 35, it is possible to reduce the need to worry about damage to the various components of the door opening and closing device 35, such as the door rail 33, drive motor 350, drive pulley 351, driven pulley 352, and switches 354 to 356.

[0064] Moreover, in the elevator 1 according to this embodiment, the rearward protruding portion 501 of the bracket 50 is provided so as to protrude rearward from the upper portion of the main body 500. This causes the support frame 4 to be inclined so that the upper portion is farther away from the floor. Therefore, various components arranged in the open space above the support frame 4 are sufficiently spaced away from the floor, and undesirable situations such as hitting the floor can be reliably prevented.

[0065] Furthermore, in the elevator 1 according to this embodiment, the bracket 50 has a vertical length H50 that is longer than the vertical length H4 of the support frame 4. This ensures that the lower end 50a and the tip 50b of the bracket 50 are in contact with the floor or the like of a building. This allows the integrated structure to be placed on the floor or the like in a stable state.

[0066] Furthermore, in the elevator 1 according to this embodiment, the bracket 50 is attached to the support frame 4 so that its position can be changed in the vertical direction. Therefore, the bracket 50 can be changed to a position appropriate for use as a base or as a bracket for fixing the integrated structure to the car 3.

[0067] Furthermore, in the elevator 1 according to this embodiment, the bracket 50 is attached to the support frame 4 using the fixing device 60, which is a bolt and nut fastener, and the bracket 50 has a slide slot 500a that is long in the vertical direction as an insertion hole for the shaft of the bolt 600. Therefore, the bracket 50 can be slid and its position changed without removing the fixing device 60.

[0068] Furthermore, in the elevator 1 according to this embodiment, the slide slot 500a is formed to be longer than the vertical length H4 of the support frame 4. This allows the bracket 50 to slide a large distance.

[0069] Furthermore, in the elevator 1 according to this embodiment, the bracket 50 includes an engaged portion 502 at a location on the rearward protruding portion 501 that is rearward of the center of gravity of the integrated structure. As a result, as shown in FIG. 21 , when the integrated structure is suspended by the suspension device 7 at the engaged portion 502, the support frame 4 is tilted so that the lower portion is positioned further rearward. This state makes it easier for the shank of the bolt 600A of the fixing device 60A attached to the lower bracket 50A to be inserted into the notched hole 40b of the support frame 4 when the integrated structure is lowered. This allows the work of assembling the integrated structure to the car 3 to be carried out smoothly during installation of the door opening and closing device 35.

[0070] Furthermore, in the elevator 1 according to this embodiment, the support frame 4 is provided with brackets 51 to 57 at multiple locations on its upper edge, and supports various components, such as the drive motor 350 (and drive pulley 351), driven pulley 352, switch 354, limit switches 355 and 356, and control box 37, via the brackets 51 to 57. This eliminates the need to ensure an area in front of the support frame 4 for arranging these various components. This allows the height dimension of the support frame 4 to be reduced, thereby reducing the weight of the support frame 4, which in turn reduces the manufacturing cost of the car 3, improves the efficiency of installation work, and reduces operating costs.

[0071] Furthermore, in the elevator 1 according to this embodiment, the drive pulley 351 is directly connected to the drive motor 350, and the drive motor 350 is supported on the support frame 4 via the bracket 51. The drive motor 350 has a base surface 350a, and is attached to the bracket 51 so that the base surface 350a is in contact with the upper edge of the support frame 4. As a result, in a system in which the drive belt 353 is directly driven by the drive motor 350 (direct drive system), the height position of the drive belt 353 can be brought closer to the rollers 312 of the car door 31, and it is possible to suppress the application of an unbalanced load (unbalanced torque) to the car door 31 due to driving. This improves the stability of the car door 31 in its left-right movement, allowing the car door 31 to open and close smoothly and quietly.

[0072] Furthermore, in the elevator 1 according to this embodiment, the upper edge of the support frame 4 is positioned lower than the top of the rollers 312. This allows the height position of the drive belt 353 to be closer to the rollers 312, and makes it possible to further suppress the application of an unbalanced load (unbalanced torque) to the car door 31 due to driving. This further improves the stability of the car door 31 in its left-right movement, allowing the car door 31 to open and close more smoothly and quietly. Moreover, the height dimension of the support frame 4 can be made smaller, making it lighter.

[0073] Furthermore, in the elevator 1 according to this embodiment, the support frame 4 is a member that is long in the left-right direction and is arranged along a vertical plane, and various components are arranged above the support frame 4 in an open space S between a front offset surface and a rear offset surface that are based on the vertical plane of the support frame 4. This allows the area above the support frame 4 to be neatly configured.

[0074] Furthermore, in the elevator 1 according to this embodiment, the brackets 50 to 58 are attached to the support frame 4 using fasteners 60 to 68 that can be fixed and unlocked by rotating them from the front. This improves the workability of repair, replacement, and maintenance work when it becomes necessary to repair or replace various components after the elevator 1 has been constructed.

[0075] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0076] In the above embodiment, the door devices 30, 22 are of a center-opening type (2CO) with one door on each side. However, the present invention is not limited to this. It goes without saying that the present invention can also be applied to a side-opening type (2S) door device with two doors, a center-opening type (4CO) door device with two doors on each side, and a side-opening type (1S) door device with one door.

[0077] In the above embodiment, the door rail 33 is provided separately from the support frame 4 and attached to the front surface of the support frame 4 via the legs 33a. However, the present invention is not limited to this. The door rail may be formed by appropriately bending a plate material of the support frame and provided integrally with the support frame.

[0078] In the above embodiment, the first pulley is the driving pulley 351 and the second pulley 352 is the driven pulley. However, the present invention is not limited to this. The first pulley may be a speed reduction pulley to which rotation is transmitted from the driving motor via a speed reduction belt.

[0079] In the above embodiment, the rearward protrusion 501 of the bracket 50 is formed by bending the upper part of a single plate material rearward. However, the present invention is not limited to this. The rearward protrusion may be a separate member from the main body and may be joined to the main body by welding or the like. Furthermore, the position of the rearward protrusion is not limited to the upper edge of the main body.

[0080] Furthermore, as long as there is no physical interference, it is naturally possible to apply the technical elements described above to other configurations, to replace the technical elements described above with other configurations, to combine the technical elements described above, etc., and this is naturally intended by the present invention. [Explanation of symbols]

[0081] 1... elevator, 2... hoistway, 20... landing, 21... three-sided frame, 22... landing door device, 23... landing door, 24... door support structure, 3...cage, 3a...opening, 3b...recess, 3A...front frame, 30...car door device, 31...car door, 310...door panel, 311...door hanger, 311a, 311b...extension portion, 311c...detection piece, 312...roller, 313...roller, 314...switch operating body, 32...door support structure, 33...door rail, 33a...leg, 34...sill, 35...Door opening and closing device (car door opening and closing device), 350... drive motor, 350a... base surface, 351... drive pulley, 352...Driven pulley, 353...Drive belt, 354...switch, 354a...switch piece, 355...Limit switch, 356...Limit switch, 37...control box, 4...support frame, 40...main body, 40a...through hole, 40b...notched hole, 41...forward protrusion, 41a...upper surface, 42a...rectangular hole, 44a...long hole, 45a...long hole, 46a...long hole, 50...bracket, 50a...lower end (first end), 50b...tip (second end), 500...main body, 500a...slide slot, 501...rear protruding portion, 502...engagement portion for hoisting tool (eye bolt), 50A...bracket, 51...bracket, 51a...notched hole, 51b...upper surface, 52...bracket, 52a...square hole, 54...bracket, 54a...long hole, 54b...upper surface, 55...bracket, 55a...long hole, 55b...upper surface, 56...bracket, 56a...long hole, 56b...upper surface, 57...bracket, 57a...screw hole, 60...Fixing fixture, 600...Bolt, 601...Plate nut, 60A...fixtures, 600A...bolts, 601A...nuts, 61...Fixing tool, 610...Bolt, 611...Plate nut, 62...Fixing tool, 620...Square root bolt, 621...Nut, 64...Fixing fixture, 640...Bolt, 641...Plate nut, 65...Fixing fixture, 650...Bolt, 651...Plate nut, 66...Fixing fixture, 660...Bolt, 661...Plate nut, 67...Fixtures, 670...Bolts, 7...Hanging tool, H...height difference, H4...length of the support frame 4 in the up-down direction (height dimension), H50...length of the bracket 50 in the up-down direction (height dimension), S...open space, X...left-right direction, Y...front-rear direction

Claims

1. a door rail that supports the car door so that the car door can slide left and right; A drive motor; a first pulley and a second pulley provided above the door rail and spaced apart in the left-right direction, around which a drive belt operatively connected to the car door is wound; a door rail on the front side, and a support frame that supports a drive motor, a first pulley, and a second pulley; The support frame has a pair of brackets spaced apart in the left-right direction on the rear surface, Each of the pair of brackets is a main body portion attached to a support frame; a rearward protruding portion protruding rearward from an upper portion of the main body portion, The bottom end of the main body and the tip of the rear protrusion are grounded to function as a base for the support frame. Elevator car door opening and closing device.

2. The first pulley is directly connected to the drive motor, The drive motor, the first pulley, and the second pulley are disposed in an open space above the support frame and are attached to the support frame via a bracket.

2. The elevator car door opening and closing device according to claim 1.

3. Each of the pair of brackets has a vertical length that is longer than the vertical length of the support frame.

3. The elevator car door opening and closing device according to claim 1 or 2.

4. Each of the pair of brackets is attached to the support frame so that its position can be changed in the vertical direction.

3. The elevator car door opening and closing device according to claim 1 or 2.

5. Each of the pair of brackets is attached to the support frame using a fastener; The fasteners are bolt and nut fasteners, Each of the pair of brackets has a vertically long slide slot as an insertion hole for the bolt shaft.

5. The elevator car door opening and closing device according to claim 4.

6. Each of the pair of brackets has an engagement portion for a lifting device at a location on the rearward protruding portion, the location being rearward of the center of gravity of the integrated structure of the door rail, the drive motor, the first pulley, the second pulley, and the support frame.

3. The elevator car door opening and closing device according to claim 1 or 2.

7. The elevator car door opening and closing device according to claim 1 or 2 is provided. Elevator.

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