Elevator car and elevator

Abstract

To provide an elevator car and elevator that can reduce the weight of the car door device. [Solution] The cage door device includes a door rail 33 that supports the cage door so that it can slide in the left-right direction, a first pulley 351 and a second pulley 352 provided above the door rail 33 at a distance from each other in the left-right direction, around which a drive belt 353 that is operatively connected to the cage door is wound, and door position detection units 354 to 356 that detect when the cage door is in a predetermined position. The first pulley 351, the second pulley 352 and the door position detection units 354 to 356 are supported by the door rail 33 via brackets. As a result, the support frame that was required in conventional cage door devices is not needed. Therefore, the weight of the cage door device can be reduced.

Description

Technical Field

[0001] The present invention relates to an elevator car and an elevator provided with a car door device.

Background Art

[0002] As this type of car, i) a door rail provided in the left - right direction along the upper edge of the entrance and exit of the car, ii) a car door slidably supported by the door rail, iii) a first pulley and a second pulley provided at intervals in the left - right direction above the door rail, iv) a drive belt wound around the first pulley and the second pulley and operatively connected to the car door, and v) a plate - shaped support frame that supports the door rail, the first pulley, and the second pulley on the front surface, is known (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the conventional car, due to the relationship of arranging the door rail, the first pulley (when the drive motor is directly connected to the first pulley, the drive motor as well) and the second pulley on the front surface of the support frame, the height dimension of the support frame becomes large, and accordingly, the weight of the support frame becomes large, and ultimately, the weight of the car door device becomes large.

[0005] Therefore, in view of such circumstances, the present invention has been made, and an object thereof is to provide an elevator car and an elevator capable of reducing the weight of the car door device.

Means for Solving the Problems

[0006] The elevator car according to the present invention is A door rail that supports the cage door so that it can slide from side to side, A first pulley and a second pulley are provided above the door rail, spaced apart in the left-right direction, around which a drive belt that is operatively connected to the car door is wound, It includes a door position detection unit that detects whether the cage door is in a predetermined position, The first pulley, the second pulley, and the door position detection unit are supported by the door rail via a bracket. It's an elevator car.

[0007] As one embodiment of the elevator car according to the present invention, Equipped with a drive motor directly connected to the first pulley, The drive motor is supported by the door rail via a bracket. This configuration can be adopted.

[0008] As one embodiment of the elevator car according to the present invention, The bracket is attached to the rear of the door rail. This configuration can be adopted.

[0009] As one embodiment of the elevator car according to the present invention, The bracket comprises a first portion attached to the rear surface of the door rail at a height that does not reach the upper edge of the door rail, a second portion extending rearward from the first portion, and a third portion rising upward from the second portion. This configuration can be adopted.

[0010] As one embodiment of the elevator car according to the present invention, A door rail is a flat, plate-shaped component. This configuration can be adopted.

[0011] As one embodiment of the elevator car according to the present invention, The door rail is a rectangular member having an upper surface, a lower surface, a rear surface, and a front surface, with convex ridges provided along the longitudinal direction on each of the upper and lower surfaces, and a locking portion for a fixture provided on at least one of the upper surface, lower surface, rear surface, and front surface. The following configuration can be adopted.

[0012] As one aspect of the elevator car according to the present invention, the door rail includes a pair of brackets spaced apart in the left-right direction at the rear surface, each of the pair of brackets has a main body portion attached to the rear surface of the door rail, and a rear protruding portion protruding rearward from the upper part of the main body portion, and by grounding the lower end of the main body portion and the tip of the rear protruding portion, it functions as a pedestal for the door rail. The following configuration can be adopted.

[0013] Also, the elevator according to the present invention includes the above elevator car. It is an elevator.

Effects of the Invention

[0014] According to the present invention, the first pulley, the second pulley, and the door position detection unit are supported by the door rail via the brackets. As a result, the support frame that was necessary in the conventional car door device becomes unnecessary. Therefore, according to the present invention, the weight of the car door device can be reduced, and thus, the manufacturing cost can be reduced, the work efficiency of the installation work can be improved, and the operation cost can be reduced.

Brief Description of the Drawings

[0015] [Figure 1] FIG. 1 is a perspective view of an elevator. [Figure 2] FIG. 2(a) is a front view of the car seen from the landing side with the car door closed. FIG. 2(b) is a front view of the car with the car door open. [Figure 3]Figure 3 is a front view of the upper part of the cage with the cage door closed. [Figure 4] Figure 4 is a front view of the upper part of the cage with the cage door open. [Figure 5] Figure 5(a) is a cross-sectional view taken along line A in Figure 3. Figure 5(b) is a cross-sectional view taken along line B in Figure 3. [Figure 6] Figure 6(a) is a front view of the upper part of the cage with the cage door removed. Figure 6(b) is a cross-sectional view taken along line C in Figure 6(a). Figure 6(c) is another example of Figure 6(b). [Figure 7] Figure 7(a) is a front view of part D in Figure 6(a). Figure 7(b) is a side view of Figure 7(a). [Figure 8] Figure 8(a) is a front view of part E in Figure 6(a). Figure 8(b) is a side view of Figure 8(a). [Figure 9] Figure 9(a) is a front view of part F in Figure 6(a). Figure 9(b) is a side view of a part of Figure 9(a). Figure 9(c) is a side view of another part of Figure 9(a). [Figure 10] Figure 10(a) is a front view of part G in Figure 6(a). Figure 10(b) is a side view of Figure 10(a). [Figure 11] Figure 11(a) is a modified example of Figure 6(a). Figure 11(b) is another example of Figure 11(a). [Figure 12] Figure 12(a) is a cross-sectional view taken along line H in Figure 11(a). Figure 12(b) is a cross-sectional view taken along line I in Figure 11(b). [Figure 13] Figure 13(a) is a cross-sectional view of the door rail according to Embodiment 2. Figures 13(b) and (c) are explanatory views of the fixing structure of the door rail according to Embodiment 2. [Figure 14] Figures 14(a) to (e) are cross-sectional views of modified examples of the door rail according to Embodiment 2. [Figure 15] Figure 15(a) is a front view of the upper part of the cage with the cage door removed in the elevator according to Embodiment 3. Figure 15(b) is a cross-sectional view of the door rail according to Embodiment 3. [Figure 16]Figures 16(a) to (d) are explanatory diagrams showing how the bracket is used as a base. [Modes for carrying out the invention]

[0016] <Elevator according to Embodiment 1> The elevator according to Embodiment 1 will be described below. In the following, when a person standing on the floor is looking at the elevator 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 in appropriate diagrams, the left-right direction is denoted as X. Also, when a person standing on the floor is looking at the elevator car (as shown in Figure 2), the side closer to themselves is referred to as "front," the side further away from themselves is referred to as "back" or "rear," the horizontal direction between front and back is referred to as the "front-back direction," and in appropriate diagrams, the front-back direction is denoted as Y. The left-right direction and the front-back direction are two directions that are perpendicular to each other in the horizontal plane. The up-down direction is synonymous with the vertical direction and is a direction that is perpendicular to both the left-right direction and the front-back direction.

[0017] As shown in Figure 1, the elevator 1 comprises a hoistway 2 and a car 3. The hoistway 2 extends vertically within a building with multiple floors. The car 3 moves up and down within the hoistway 2 by the drive mechanism and stops at a designated floor when the drive mechanism is stopped.

[0018] The elevator car 3 is equipped with an elevator car door device 30. The elevator car door device 30 comprises an elevator car door 31, a door support structure 32, and a door opening / closing device 35. The elevator car door 31 moves left and right, opening and closing the opening at the front of the elevator car 3 (elevator entrance / exit), allowing people to get on and off. The door support structure 32 is a structure that supports the elevator car door 31 while enabling its opening and closing operation. The door opening / closing device 35 is a device for opening and closing the elevator car door 31.

[0019] In contrast, the landing 20 on each floor is equipped with a three-sided frame 21 and a landing door device 22. The three-sided frame 21 is formed on the wall surface, and the inside of the frame is an opening of a size corresponding to the opening of the elevator car 3. The landing door device 22 is equipped with a landing door 23 and a door support structure 24. The landing door 23 moves in the left-right direction, opening and closing the opening (landing entrance) in the three-sided frame 21, allowing people to get on and off. The landing door 23 is normally closed by an elastic force, opens in accordance with the opening operation of the elevator car door 31 of the elevator car 3 when it is stopped on the floor, and closes with the closing operation of the elevator 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.

[0020] As shown in Figure 2, the car door 31 comprises a door panel 310 and a door hanger 311. The door panel 310 is positioned along a vertical plane and is the main body of the car door 31 that opens and closes the opening 3a of the car 3. The door hanger 311 is integrally attached to the door panel 310 at its upper end. The door hanger 311 comprises a pair of rollers 312, 312. The pair of rollers 312, 312 are provided at the upper end of the door hanger 311, spaced apart in the left-right direction.

[0021] The door support structure 32 comprises a door rail 33 and a sill 34. The door rail 33 is a straight, long, flat, rectangular, plate-like member. The door rail 33 is provided in the left-right direction on the upper front of the car 3, along the upper edge of the opening 3a of the car 3, with both ends extending to the left and right 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 suspended from the door rail 33 in a state where it can slide along the door rail 33 in the left-right direction. The door rail 33 is a structure that supports the upper part of the car door 31 while enabling the opening and closing operation of the car door 31. On the other hand, the sill 34 is provided in the left-right direction on the lower front of the car 3, along the lower edge of the opening 3a of the car 3, with both ends extending to the left and right beyond the lower edge of the opening 3a. The threshold 34 is a structure that supports the lower part of the cage door 31 while enabling the opening and closing operation of the cage door 31.

[0022] As shown in Figures 3 and 4, the door opening and closing device 35 comprises a drive motor 350, a drive pulley 351, a driven pulley 352, and a drive belt 353. The drive motor 350 is provided on either the left or right end of the upper front of the car 3. The drive pulley 351 is provided coaxially and integrally with the drive shaft of the drive motor 350 and is directly connected to the drive motor 350. The driven pulley 352 is provided on either the left or right end of the upper front of the car 3. The drive belt 353 is an endless belt that is wrapped around the drive pulley 351 and the driven pulley 352. The drive belt 353 is provided in the left-right direction and is provided parallel to the door rail 33.

[0023] When the drive motor 350 is driven, the drive pulley 351 rotates, and consequently, the drive belt 353 moves in a circular motion. As a result, the two car doors 31, 31 (the hatched parts) reciprocate along the door rail 33 (the hatched parts), opening and closing. 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 opposite directions. In other words, the car door device 30 and the landing door device 22 are of the center-opening type, where the opening 3a of the car 3 opens from the center.

[0024] 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 spaced apart in the left-right direction and each is integrally attached 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 and 311b are formed in the left half or right half of the first member, divided by the center line in the left-right direction. The first member is manufactured by cutting the entire shape from a single sheet of material. Therefore, the extended portions 311a and 311b are extensions of the main body of the first member that protrude upward and are provided integrally with the main body.

[0025] As shown in Figure 5, the upper ends of the extended portions 311a and 311b are bent. The bent portion is a part that protrudes rearward (or forward) and is positioned along the horizontal plane. One side of the drive belt 353 is fixed using a fastener while in contact with the lower (or upper) surface of the bent portion of the extended portion 311a. The other side of the drive belt 353 is fixed using a fastener while in contact with the upper (or lower) surface of the bent portion of the extended portion 311b.

[0026] Roller 312 is rotatably mounted on the inner surface of the door hanger 311 (first member). Roller 313 is rotatably mounted on the inner surface of the door hanger 311 (second member). Roller 312 contacts the upper edge of the door rail 33. Roller 313 contacts the lower edge of the door rail 33.

[0027] In one car door 31, a switch operating body 314 is attached to the inner surface of the door hanger 311 (first member). The switch operating body 314 is equipped with a roller and turns on the switch 354 when the car door 31 is closed. In the other car door 31, the extended portion 311b (bent portion) of the door hanger 311 is equipped with a detection piece 311c. The detection piece 311c is a detection piece for limit switches 355 and 356.

[0028] As shown in Figure 6, the door rail 33 is also a member that attaches and supports various components described later. The door rail 33 has rigidity that does not easily deform and is a metal member made of, for example, iron, steel, stainless steel, or aluminum.

[0029] The door rail 33 is attached to the upper front of the car 3. For example, the door rail 33 is attached to the upper front of the car 3 via a bracket 50 and an appropriate bracket 50A (Figures 6(b), (c)). The upper front of the car 3 has a recess 3b that is recessed in the depth direction, and the door rail 33 is positioned in front of the recess 3b. As a result, the door rail 33 faces the back surface of the recess 3b with a gap between them, and an open space S is formed above the door rail 33. The bracket 50 is attached to at least both ends of the door rail 33. In addition, the bracket 50 is attached to appropriate locations between both ends of the door rail 33 (in this example, two locations that divide it into three equal parts) for the purpose of ensuring the rigidity of the door rail 33. The bracket 50A is connected to the bracket 50 and is attached to the outer surface of the car 3. As a result, the door rail 33 is fixed to the upper front of the car 3.

[0030] As another example, the door rail 33 is attached to the upper front of the car 3 via the front frame of the car 3. A pair of front frames is provided on at least both sides of the car 3, and the door rail 33 is positioned to straddle the pair of front frames. As a result, the door rail 33 faces the front of the car 3 with a gap between them, and a similar open space S is formed above the door rail 33.

[0031] The various components of the door opening / closing device 35, including 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 door rail 33. Additionally, a control box 37 is attached to an appropriate location on the door rail 33 as another component. These various components are attached to the door rail 33 via brackets. The brackets are provided at multiple locations on the door rail 33 and extend upward or backward from the upper edge of the door rail 33, provided that the rollers 312 (and rollers 313) of the door hanger 311 of the car door 31 do not come into contact with them. This allows the various components to be positioned within the open space S. The brackets are made of metal, such as iron, steel, stainless steel, or aluminum, and possess rigidity that prevents easy deformation.

[0032] As shown in Figure 7, the bracket 51 supporting the drive motor 350 and drive pulley 351 is attached to the rear surface (back) of the door rail 33. The bracket 51 is detachably attached to the door rail 33 using a fastener 61. The fastener 61 is a combination of a bolt and a screw hole (including washers, spring washers, etc. as needed; the same applies hereafter when referring to the fastener). The fastener 61 is a combination of a bolt 610 and a screw hole 33b. The screw hole 33b is formed on the rear surface of the door rail 33. The lower end of the bracket 51 has a notched hole 51a as an insertion hole for the shaft of the bolt 610. The notched hole 51a is an open hole at its lower edge. The bolt 610 is inserted into the insertion hole of the bracket 51 from the rear of the door rail 33 and screwed into the screw hole 33b. The bracket 51 can be removed by pulling it upward with the fastener 61 loosened.

[0033] The bracket 51 is formed by bending a plate. The bracket 51 comprises a first part, a second part, and a third part. The first part is the part that is attached to the rear surface of the door rail 33. The first part is arranged vertically, and the upper edge of the first part is located above the width center of the door rail 33 and below the upper edge of the door rail 33. As a result, the first part is positioned at a height that does not reach the upper edge of the door rail 33 (a height that does not interfere with the roller 312 of the door hanger 311 of the cage door 31). The second part is the part that extends rearward (including diagonally rearward) from the upper edge of the first part. The third part is the part that rises upward from the tip of the second part. The drive motor 350 is attached to the third part.

[0034] As shown in Figure 8, the bracket 52 supporting the driven pulley 352 is attached to the rear surface of the door rail 33. The bracket 52 is detachably attached to the door rail 33 using a fastener 62. The fastener 62 is a fastener consisting of a bolt and a screw hole. The fastener 62 is a combination of a bolt 620 and a screw hole 33b. The lower end of the bracket 52 has a notched hole 52a as an insertion hole for the shaft of the bolt 620. The notched hole 52a is an open hole at the lower edge. The bolt 620 is inserted into the insertion hole of the bracket 52 from the rear of the door rail 33 and screwed into the screw hole 33b. The bracket 52 can be removed by pulling it upward with the fastener 62 loosened.

[0035] Bracket 52 is formed by bending a plate. Bracket 52 comprises a first part, a second part, and a third part. The first part is attached to the rear surface of the door rail 33. The first part is positioned vertically, and the upper edge of the first part is located above the width center of the door rail 33 and below the upper edge of the door rail 33. This positions the first part at a height that does not reach the upper edge of the door rail 33 (a height that does not interfere with the roller 312 of the door hanger 311 of the cage door 31). The second part is an extension from the upper edge of the first part to the rear (including diagonally to the rear). The third part is an upward-rising part from the tip of the second part. The driven pulley 352 is rotatably attached to the third part. 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 is adjusted.

[0036] As shown in Figure 9, the bracket 54 supporting the switch 354 is attached to the rear surface of the door rail 33. The bracket 54 is detachably attached to the door rail 33 using a fastener 64. The fastener 64 is a fastener consisting of a bolt and a screw hole. The fastener 64 is a combination of a bolt 640 and a screw hole 33b. The lower end of the bracket 54 has a through hole 54a as an insertion hole for the shaft of the bolt 640. The through hole 54a is a hole with a larger diameter than the shaft of the bolt 640. The bolt 640 is inserted into the through hole of the bracket 54 from the rear of the door rail 33 and screwed into the screw hole 33b. With the fastener 64 loosened, the bracket 54 can be adjusted in the left-right and up-down directions relative to the door rail 33.

[0037] Bracket 54 is formed by bending a plate. Bracket 54 comprises a first part, a second part, and a third part. The first part is the part that is attached to the rear surface of the door rail 33. The first part is arranged vertically, and the upper edge of the first part is located above the width center of the door rail 33 and below the upper edge of the door rail 33. This positions the first part at a height that does not reach the upper edge of the door rail 33 (a height that does not interfere with the roller 312 of the door hanger 311 of the cage door 31). The second part is the part that extends rearward (including diagonally rearward) from the upper edge of the first part. The third part is the part that rises upward from the tip of the second part. The switch 354 is attached to the third part so that it can be adjusted in the front-rear and left-right directions (by the amount of the gap between the bolt shaft and the insertion hole).

[0038] Switch 354 is a switch that detects when the car door 31 is in the closed position. Switch 354 includes a switch piece 354a. The switch piece 354a is pivotably mounted on the lower surface of the main body of the switch 354, and when the car door 31 is in the closed position, the switch operating body 314 of the car door 31 comes into contact with it, pushing it up and turning switch 354 ON. Switch 354 is an interlock switch that constitutes part of the safety circuit of the drive unit of the elevator 1.

[0039] The bracket 55 supporting the limit switch 355 is attached to the rear surface of the door rail 33. The bracket 55 is detachably attached to the door rail 33 using a fastener 65. The fastener 65 is a fastener consisting of a bolt and a screw hole. The fastener 65 is a combination of a bolt 650 and a screw hole 33b. The lower end of the bracket 55 has a through hole 55a as an insertion hole for the shaft of the bolt 650. The through hole 55a is a hole with a larger diameter than the shaft of the bolt 650. The bolt 650 is inserted into the through hole of the bracket 55 from the rear of the door rail 33 and screwed into the screw hole 33b. With the fastener 65 loosened, the bracket 55 can be adjusted in the left-right and up-down directions relative to the door rail 33.

[0040] Bracket 55 is formed by bending a plate. Bracket 55 comprises a first part, a second part, and a third part. The first part is the part that is attached to the rear surface of the door rail 33. The first part is arranged vertically, and the upper edge of the first part is located above the width center of the door rail 33 and below the upper edge of the door rail 33. This positions the first part at a height that does not reach the upper edge of the door rail 33 (a height that does not interfere with the roller 312 of the door hanger 311 of the cage door 31). The second part is the part that extends rearward (including diagonally rearward) from the upper edge of the first part. The third part is the part that rises upward from the tip of the second part. The limit switch 355 is attached to the third part so that it can be adjusted in the front-rear and left-right directions (by the amount of the gap between the shaft of a bolt and the insertion hole, not shown).

[0041] The limit switch 355 is a switch that detects when the cage door 31 is in the closed position. For example, the limit switch 355 is a proximity sensor. Note that the function of the limit switch 355 can also be performed by switch 354, so it is possible to eliminate the limit switch 355.

[0042] The limit switch 356 is a switch that detects when the cage door 31 is in the open position. The limit switch 356, the bracket 56 supporting the limit switch 356, the fastener 66, and the fixing structure are substantially the same as the limit switch 355, the bracket 55, the fastener 65, and the fixing structure, although they are arranged in a symmetrical manner as shown in Figure 6. For this reason, the explanation of the configuration is omitted as it is the same.

[0043] As shown in Figure 6, the bracket 57, fasteners, and fixing structure supporting the control box 37 are the same as the bracket 55, fasteners 65, and fixing structure supporting the limit switch 355. Therefore, the explanation of the configuration is omitted as it is the same.

[0044] The control box 37 houses a sub-control unit 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 installed on the door rail 33.

[0045] With the control box 37 removed, the integrated structure (hereinafter simply referred to as the "integrated structure") comprising the door rail 33, drive motor 350, drive pulley 351, driven pulley 352, and switches 354-356 is provided with at least one pair of brackets 50, 50 spaced apart in the left-right direction on its rear surface. As an example, the brackets 50 are arranged at a total of four locations: at each end of the door rail 33 and at two locations in between. The locations between the ends of the door rail 33 may be just one location in the center of the door rail 33 (around the area between switches 354 and 355).

[0046] As shown in Figure 10, the bracket 50 comprises a main body portion 500 and a rear projection portion 501. The main body portion 500 is a straight, flat, rectangular, plate-like portion arranged along a vertical plane. The rear projection portion 501 is a portion that protrudes rearward from the upper edge of the main body portion 500, and is a straight, flat, rectangular, plate-like portion arranged along a horizontal plane. The main body portion 500 and the rear projection portion 501 are integrally formed. As an example, the main body portion 500 and the rear projection portion 501 are formed in an inverted L shape by bending the upper part of a single plate material backward.

[0047] The bracket 50 (main body portion 500) has a vertical length that is longer than the vertical length of the door rail 33 (width of the door rail 33). As a result, the bracket 50 extends downward from the lower edge of the door rail 33, and the lower end 50a of the bracket 50 (main body portion 500) is located at a height below the lower edge of the door rail 33. In addition, the bracket 50 extends upward from the upper edge of the door rail 33, and the tip 50b of the bracket 50 (rear projection portion 501) is located at a height above the upper edge of the door rail 33.

[0048] Bracket 50 is attached to the rear surface of the door rail 33. Bracket 50 is detachably attached to the door rail 33 using a fastener 60. Fastener 60 is a bolt and nut fastener. Fastener 60 is a combination of a bolt 600 and a nut 33c. The nut 33c is attached to the leg 33a of the door rail 33. More specifically, the leg 33a is formed by a hat bend, which bends both sides of a single metal plate in an offset shape, and is attached to the rear surface of the door rail 33 using a fastener, while the nut 33c is fixed to this inner recess by welding or the like. The main body 500 of bracket 50 has a sliding elongated hole 500a as an insertion hole for the shaft of the bolt 600. The sliding elongated hole 500a is a hole that is long in the vertical direction. The bolt 600 is inserted into the insertion hole of bracket 50 from the rear of the door rail 33 and screwed into the nut 33c. With the fastener 60 loosened, the bracket 50 can be repositioned vertically relative to the door rail 33 and can slide.

[0049] The bracket 50 is equipped with an eyebolt 502 as an engaging portion for the lifting device. The eyebolt 502 is located on the rear projection 501, behind the center of gravity of the integral structure. The eyebolt 502 is provided so as to protrude upward from the upper surface of the rear projection 501.

[0050] Bracket 50 is equipped with a fastener 60A at the end of the rear projection 501. The fastener 60A is a bolt-nut fastener, consisting of one bolt 600A and one nut 601A. The fastener 60A is used to secure bracket 50 and bracket 50A (Figures 6(b), (c)).

[0051] As shown in Figures 11 and 12, the door rail 33 is equipped with a cover 38. The cover 38 covers part or all of the open space S in the left-right direction from the front, rear and above. As a result, the switch 354, limit switches 355, 356 and driven pulley 352 are covered by the cover 38 (Figure 11(a)). Alternatively, the drive motor 350, drive pulley 351, switch 354, limit switches 355, 356 and driven pulley 352 are covered by the cover 38 (Figure 11(b)). In either case, the upper part of the cage door 31 (the upper part of the door hanger 311) and the drive belt 353 are also covered by the cover 38.

[0052] The bracket 58, fasteners, and fixing structure supporting the cover 38 are the same as those supporting the bracket 57, fasteners, and fixing structure of the control box 37. Therefore, the description of the configuration is omitted as it is the same.

[0053] As shown in Figures 3 and 4, the car door device 30 includes a landing door engagement device 39. The landing door engagement device 39 engages with the engaged body (for example, a roller) 230 of the landing door 23 when the car door 31 is opened (and closed), thereby causing the landing door 23 to open (and close) in conjunction with the opening (and closing) of the car door 31. The landing door engagement device 39 comprises a first engaging body 390, a second engaging body 391, and a link 392 on the car door 31 side, and a cam 393 on the entrance / exit side of the car 3.

[0054] The first engaging body 390 is fixed. The second engaging body 391 is provided to move between a first state (Figure 3) and a second state (Figure 4) in which it is closer to the first engaging body 390 than in the first state, and the distance (width) between them becomes narrower. The link 392 is operably connected to the second engaging body 391 at one end. As shown in Figure 3, when the car door 31 is closed, the other end (roller) of the link 392 comes into contact with the cam 393, displacing the second engaging body 391 from the second state to the first state. Then, as shown in Figure 4, when the car door 31 opens and the other end of the link 392 moves away from the cam 393, the second engaging body 391 is displaced from the first state to the second state by its own weight.

[0055] As shown in Figure 9, the cam 393 is located at an intermediate position in the left-right direction of the door rail 33 and is attached to the front of the door rail 33 via a bracket 394.

[0056] <Elevator according to Embodiment 2> Next, we will describe the elevator according to Embodiment 2. In the following, we will mainly describe the differences from the elevator according to Embodiment 1, and will omit descriptions of the same points, as they are the same as described above.

[0057] As shown in Figure 13(a), the door rail 33 is a rectangular member having an upper surface 330, a lower surface 331, a rear surface 332, and a front surface 333. As an example, the door rail 33 is made of extruded aluminum.

[0058] The upper surface 330 has a first protrusion 334 along its longitudinal direction. The lower surface 331 has a second protrusion 335 along its longitudinal direction. The first protrusion 334 and the second protrusion 335 have a semicircular cross-section and, together with the front surface 333, constitute a rail section. Specifically, the first protrusion 334 forms the upper edge of the rail section, and the roller 312 of the door hanger 311 of the car door 31 contacts and engages with it from above, while the second protrusion 335 forms the lower edge of the rail section, and the roller 313 of the door hanger 311 of the car door 31 contacts and engages with it from below.

[0059] The lower surface 331 is provided with an enlarged portion 336 along its longitudinal direction. The enlarged portion 336 is intended to increase the area of ​​the rear surface 332 and enhance rigidity.

[0060] The rear surface 332 is provided with a T-groove 337 or dovetail groove (hereinafter simply referred to as "T-groove") along its longitudinal direction. A pair of T-grooves 337 are provided side by side in the vertical direction. The T-grooves 337 receive the head (hexagonal head) of a bolt so as not to rotate around its axis and are slidable at any point along its longitudinal direction. The front surface 333 is also provided with a T-groove 337 along its longitudinal direction. The top surface 330 is provided with screw holes 338 at appropriate locations along its longitudinal direction. The T-grooves 337 and screw holes 338 function as locking parts for the fastener.

[0061] As shown in Figure 13(b), brackets 50 and 51-58 can be attached to the rear surface 332 using T-grooves 337 and fasteners. Brackets 51-58 can also be attached to the top surface 330 using screw holes 338 and fasteners.

[0062] As shown in Figure 13(c), brackets can be attached to the front surface 333 in areas that do not interfere with the cage door 31 (for example, the center or end of the door rail 33) using T-grooves 337 and fasteners. In the illustrated example, the bracket is attached to the center of the door rail 33 and supports the door lock device switch (interlock switch) 40.

[0063] As shown in Figure 14, the door rail 33 can take on various forms. For example, in the door rail 33 shown in Figure 14(a), two first protrusions 334 and two second protrusions 335 are provided to support two car doors, such as in a side-opening type (2S) door system with two doors or a center-opening type (4CO) door system with two doors on each side.

[0064] <Elevator according to Embodiment 3> Next, we will describe the elevator according to Embodiment 3. In the following, we will mainly describe the differences from the elevator according to Embodiment 1, and will omit descriptions of the same points, as they are the same as described above.

[0065] As shown in Figure 15, the door rail 33 is integrated with the brackets 51-58. For example, the door rail 33 is a sheet metal material formed by bending a single sheet of material that has been cut into a predetermined shape.

[0066] <Effects of elevators according to each embodiment> In the elevators according to Embodiments 1 to 3, various components such as the drive motor 350 (and drive pulley 351), driven pulley 352, switch 354, limit switches 355, 356, and control box 37 are supported on the door rail 33 via brackets 51 to 57. This eliminates the need for a support frame, which was required in conventional car door devices. As a result, the weight of the car door device 30 can be reduced, which in turn reduces the manufacturing cost of the car 3, improves the efficiency of installation work, and reduces operating costs.

[0067] According to the elevators of embodiments 1 to 3, the brackets 51 to 58 are attached to the rear, top, or bottom surface of the door rail 33. This allows the front surface of the door rail 33 to be neatly arranged.

[0068] In the elevator according to Embodiments 1 and 2, the fastener 61 of the bracket 51 supporting the drive motor 350 is a bolt / screw fastener, and the bracket 51 has a notched hole 51a that is open at the lower edge, which serves as an insertion hole for the shaft portion of the bolt 610. As a result, the drive motor 350 and the bracket 51 can be removed by pulling them upward with the fastener 61 loosened. Therefore, the workability of installation and removal operations can be improved.

[0069] In the elevator according to Embodiments 1 and 2, the fixing device 62 of the bracket 52 supporting the driven pulley 352 is a bolt / screw fastener, and the bracket 52 has a notched hole 52a that is open at the lower edge, which serves as an insertion hole for the shaft portion of the bolt 620. As a result, the bracket 52 can be removed by pulling it upward while the fixing device 62 is loosened. Therefore, the workability of installation and removal operations can be improved.

[0070] In the elevators according to Embodiments 1 and 2, the fasteners 64 to 66 of the brackets 54 to 56 that support the switch 354 and limit switches 355 and 356 are bolt and screw-hole fasteners, and the brackets 54 to 56 have through holes 54a to 56a that are larger in diameter than the shafts of the bolts 640 to 660, serving as insertion holes for the shafts of the bolts 640 to 660. As a result, the left-right and up-down positions of the brackets 54 to 56, and consequently the left-right and up-down positions of the switch 354 and limit switches 355 and 356, can be adjusted or fine-tuned.

[0071] In the elevators according to Embodiments 1 to 3, the bracket 50 is attached to multiple locations on the door rail 33 that do not interfere with other brackets 51 to 58 and various components. As a result, the door rail 33 is firmly fixed to the car 3 by the multiple brackets 50. Therefore, it is possible to effectively prevent the door rail 33 from undergoing deformation such as twisting due to the load of the car door 31.

[0072] In the elevator according to Embodiments 1 to 3, as shown in Figure 16, the bracket 50 lifts the door rail 33 off the floor by grounding the lower end 50a of the main body 500 and the tip 50b of the rear projection 501 to the building floor, and functions as a base for the door rail 33. Therefore, during the installation of the door opening and closing device 35, it is possible to reduce the need to worry about damage to various components such as the door rail 33, drive motor 350, drive pulley 351, driven pulley 352, and switches 354 to 356.

[0073] In the elevator according to Embodiments 1 to 3, the rear projection 501 of the bracket 50 is provided to project rearward from the upper part of the main body 500. As a result, the door rail 33 is inclined so that it is further away from the floor at the top. Therefore, the various components placed in the open space above the door rail 33 are sufficiently far from the floor, and undesirable situations such as hitting the floor can be reliably avoided.

[0074] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention.

[0075] In the above embodiment, the door devices 30 and 22 are of the center-opening type (2CO) with one door on each side. However, the present invention is not limited thereto. Needless to say, the present invention can also be applied to side-opening type (2S) door devices with two doors, center-opening type (4CO) door devices with two doors on each side, and side-opening type (1S) door devices with one door.

[0076] In the above embodiment, the first pulley is a drive pulley 351, and the second pulley 352 is a driven pulley. However, the present invention is not limited thereto. The first pulley may also be a reduction pulley whose rotation is transmitted from the drive motor via a reduction belt.

[0077] Unless there is 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, and to combine the technical elements described above with each other, and this is naturally what the present invention intends. [Explanation of Symbols]

[0078] 1...Elevator, 2...Hoistway, 20...Landing, 21...Three-sided frame, 22...Landing door device, 23...Landing door, 230...Engaged body (roller), 24...Door support structure, 3...Car, 3a...Opening, 3b...Recess, 30...Car door device, 31...Car door, 310...Door panel, 311...Door hanger, 311a, 311b...Extended part, 311c...Detection piece, 312...Roller, 313...Roller, 314...Switch operating body, 32...Door support structure, 33...Door rail, 33a...Leg, 3 3b...Screw hole, 33c...Nut, 330...Top surface, 331...Bottom surface, 332...Rear surface, 333...Front surface, 334...First protrusion, 335...Second protrusion, 336...Enlarged section, 337...T-groove, 338...Screw hole, 34...Sill, 35...Door opening / closing device, 350...Drive motor, 351...Drive pulley, 352...Driven pulley, 353...Drive belt, 354...Switch, 354a...Switch piece, 355...Limit switch, 356...Limit switch, 37...Control box, 38...Cover 39... Landing door engaging device, 390... First engaging body, 391... Second engaging body, 392... Link, 393... Cam, 394... Bracket, 40... Interlock switch, 50... Bracket, 50a... Lower end (first end), 50b... Front end (second end), 500... Main body, 500a... Sliding slot, 501... Rear projection, 502... Engaged part for hanging device (eyebolt), 50A... Bracket, 51... Bracket, 51a... Notch hole, 52... Bracket, 52a... Notch hole, 54...Bracket, 54a...Through hole, 55...Bracket, 55a...Through hole, 56...Bracket, 56a...Through hole, 57...Bracket, 58...Bracket, 60...Fixing device, 600...Bolt, 60A...Fixing device, 600A...Bolt, 601A...Nut, 61...Fixing device, 610...Bolt, 62...Fixing device, 620...Bolt, 64...Fixing device, 640...Bolt, 65...Fixing device, 650...Bolt, 66...Fixing device, 660...Bolt, S...Open space, X...Left / right direction, Y...Front / back direction

Claims

1. A door rail that supports the cage door so that it can slide from side to side, A first pulley and a second pulley are provided above the door rail, spaced apart in the left-right direction, around which a drive belt that is operably connected to the car door is wound. It includes a door position detection unit that detects whether the cage door is in a predetermined position, The first pulley, the second pulley, and the door position detection unit are supported by the door rail via a bracket. An elevator car.

2. Equipped with a drive motor directly connected to the first pulley, The drive motor is supported by the door rail via a bracket. The elevator car according to claim 1.

3. The bracket is attached to the rear of the door rail. An elevator car according to claim 1 or claim 2.

4. The bracket comprises a first portion attached to the rear surface of the door rail at a height that does not reach the upper edge of the door rail, a second portion extending rearward from the first portion, and a third portion rising upward from the second portion. The elevator car according to claim 3.

5. A door rail is a flat, plate-shaped component. An elevator car according to claim 1 or claim 2.

6. The door rail is a rectangular member having a top surface, bottom surface, rear surface, and front surface. The top surface and bottom surface each have a protrusion along the longitudinal direction, and at least one of the top surface, bottom surface, rear surface, and front surface is provided with a locking portion for a fastener. An elevator car according to claim 1 or claim 2.

7. The door rail has a pair of brackets spaced apart on the rear side in the left-right direction. Each of the pair of brackets is, The main body is attached to the rear of the door rail, It is equipped with a rear projection that protrudes from the upper part of the main body, By grounding the lower end of the main body and the tip of the rear projection, it functions as a base for the door rail. An elevator car according to claim 1 or claim 2.

8. The elevator car is provided as described in claim 1 or claim 2. Elevator.

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