Elevator door device

Abstract

To provide an elevator door device capable of preventing adhesion of abrasion powder of an endless belt to a door rail and a roller of a door part.SOLUTION: The present invention includes: a door rail; a door part having a door panel and a roller and configured to move in an opening / closing direction by the roller rolling on the door rail; a door drive part configured to drive the door part; and an adhesion prevention part extending in the opening / closing direction. The door drive part includes a motor part configured to drive and rotate a drive pulley, a driven pulley which is disposed spaced apart from the drive pulley in the opening / closing direction, and an endless belt that is wound around the drive pulley and the driven pulley, and to which the door part is connected. The door rail is located below the drive pulley when viewed from the opening / closing direction. The adhesion prevention part is disposed between the drive pulley, and the door rail and the roller when viewed from the opening / closing direction, and disposed at a position corresponding to the drive pulley in the opening / closing direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an elevator door device. [Background technology]

[0002] 2. Description of the Related Art Conventionally, elevator door devices that are arranged at the entrance and exit of a car or the like have been known (see Patent Document 1). As shown in FIG. 22, this door device 100 comprises a door rail 101 attached to a frame 100b arranged above the car entrance 100a and extending in the opening and closing direction of the car entrance 100a, a door section 102 that opens and closes along the door rail 101, and a door drive section 105 that drives the door section 102 to open and close.

[0003] The door section 102 includes a door hanger 103 having a roller 103 a that moves in the opening and closing direction as the roller 103 a rolls on the door rail 101 , and a door panel 104 that is hung from the door hanger 103 .

[0004] The door drive unit 105 also has a motor 107 having a drive pulley 106, a driven pulley 108 arranged at an interval in the opening / closing direction from the drive pulley 106, and an endless belt 109 wound around the drive pulley 106 and the driven pulley 108. The drive pulley 106 and the driven pulley 108 are arranged above the door rail 101 so as to be located on both sides of the car entrance 100a in the opening / closing direction.

[0005] The door hanger 103 is connected to an endless belt 109, and when the belt 109 is rotated by a motor 107, the door portion 102 moves in the opening and closing direction. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] International Publication No. 2020 / 084679 Summary of the Invention [Problem to be solved by the invention]

[0007] In the above door device 100, the door rail 101 is disposed below the drive pulley 106, and when the door part 102 is opened or closed, the roller 103a of the door part 102 rolls on the door rail 101. At this time, the belt 109 is worn at the contact portion between the belt 109 and the drive pulley 106 due to the rotational driving force of the motor 107, and wear powder adheres to the door rail 101 and the roller 103a, which may make it difficult for the door part 102 to move along the door rail 101 to open or close.

[0008] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an elevator door device that prevents wear powder from the endless belt from adhering to the door rail and rollers of the door section. [Means for solving the problem]

[0009] The elevator door device according to the present invention comprises: An elevator door device, comprising: A door rail extending in the opening and closing direction of the door panel; a door section including the door panel and a roller rotatable about a rotation axis perpendicular to the opening / closing direction and extending in a horizontal direction, the roller rolling on the door rail to move in the opening / closing direction; a door driving unit that drives the door unit in the opening and closing direction; An adhesion prevention portion extending in the opening and closing direction, The door drive unit is A motor unit having a drive pulley and rotating the drive pulley; a driven pulley disposed at an interval in the opening / closing direction relative to the driving pulley; an endless belt that is wound around the drive pulley and the driven pulley and to which the door part is connected; The door rail is located below the drive pulley when viewed from the opening / closing direction, The adhesion prevention portion is disposed between the drive pulley and the door rail and the roller when viewed from the opening and closing direction, and is disposed at a position corresponding to the drive pulley in the opening and closing direction.

[0010] In this way, by arranging an adhesion prevention portion between the drive pulley and the door rail and roller located below the drive pulley at a position corresponding to the drive pulley in the opening and closing direction, adhesion of wear powder that has fallen from the endless belt (the portion wrapped around the drive pulley and its vicinity) to the door rail and roller is suppressed.

[0011] In the elevator door device, The adhesion prevention portion may have a dimension in the direction of the rotation axis of the roller such that the door rail and the roller are hidden when viewed downward from the position of the drive pulley.

[0012] With this configuration, wear powder that falls from the endless belt (the portion wrapped around the drive pulley and its vicinity) is less likely to reach the door rail and rollers located below, thereby effectively preventing wear powder from adhering to the door rail and rollers.

[0013] Further, the door device of the elevator is A frame member extending in the opening and closing direction is provided, The frame member includes: a first portion that extends in a planar direction perpendicular to a rotation axis direction of the roller and has one surface in the rotation axis direction on which the door rail is disposed; a second portion extending from an upper end of the first portion toward the one surface side in the rotation axis direction and extending in the opening / closing direction, The second portion may constitute the adhesion prevention portion.

[0014] In this way, by configuring the adhesion prevention portion using a part (second portion) of the member (frame member) on which the door rail is arranged, it becomes easier to reduce the number of parts and simplify the configuration.

[0015] in this case, A tip end portion in the rotation axis direction of the second portion may extend downward, or in an inclined direction that is gradually lower as it progresses toward the tip end.

[0016] With this configuration, the tip extending downward or in the inclined direction makes it even more difficult for wear powder that falls from the endless belt (the portion wrapped around the drive pulley and its vicinity) to reach the door rail and roller located below, thereby more effectively preventing wear powder from adhering to the door rail and roller.

[0017] Further, the door device of the elevator is A frame member extending in the opening and closing direction is provided, the motor unit is disposed at an upper end of the frame member, The adhesion prevention portion may be disposed between the drive pulley and an upper end of the frame member in the up-down direction.

[0018] In this way, by positioning the adhesion prevention section close to the drive pulley in the vertical direction, the adhesion prevention section prevents the wear powder from moving toward the door rail and roller immediately after it falls from the endless belt (i.e., before the area over which the wear powder falls expands: see Figure 15), thereby more effectively preventing the wear powder from adhering to the door rail and roller. Effect of the Invention

[0019] As described above, according to the present invention, it is possible to provide an elevator door device that suppresses adhesion of wear powder from the endless belt to the door rail and rollers of the door portion. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic diagram showing the configuration of an elevator door device according to this embodiment as viewed from the entrance / exit direction. [Diagram 2] FIG. 2 is a diagram showing the configuration of the door drive unit and its surroundings as viewed from the opening and closing direction. [Diagram 3]FIG. 3 is a diagram showing a configuration of an adhesion prevention portion, a door rail, a first roller, and their surroundings according to another embodiment, as viewed from the opening and closing direction. [Figure 4] FIG. 4 is a diagram showing a configuration of an adhesion prevention portion, a door rail, a first roller, and their surroundings according to another embodiment, as viewed from the opening and closing direction. [Diagram 5] FIG. 5 is a diagram showing a configuration of an adhesion prevention portion, a door rail, a first roller, and their surroundings according to another embodiment, as viewed from the opening and closing direction. [Figure 6] FIG. 6 is a diagram showing a configuration of an adhesion prevention portion, a door rail, a first roller, and their surroundings according to another embodiment, as viewed from the opening and closing direction. [Figure 7] FIG. 7 is a diagram showing the configuration of an adhesion prevention portion, a door rail, a first roller, and their surroundings according to another embodiment, as viewed from the opening and closing direction. [Figure 8] FIG. 8 is a diagram showing a configuration of an adhesion prevention portion, a door rail, a first roller, and their surroundings according to another embodiment, as viewed from the opening and closing direction. [Figure 9] FIG. 9 is a diagram showing an adhesion prevention portion according to another embodiment and its surrounding configuration as viewed from the entering / exiting direction. [Figure 10] FIG. 10 is a diagram showing an adhesion prevention portion according to another embodiment and its surrounding configuration as viewed from the entry / exit direction. [Figure 11] FIG. 11 is a view of the adhesion prevention portion as seen from the entrance / exit direction. [Figure 12] FIG. 12 is a top view of the adhesion prevention portion. [Figure 13] FIG. 13 is a cross-sectional view taken along the line XIII-XIII in FIG. [Figure 14] FIG. 14 is a diagram showing the cover member and its surrounding structure as viewed from the opening / closing direction. [Figure 15] FIG. 15 is a diagram showing the cover member and its surrounding structure as viewed from the entrance / exit direction. [Figure 16] FIG. 16 is a view showing a cover member according to another embodiment as viewed from the opening and closing direction. [Figure 17] FIG. 17 is a view showing a cover member according to another embodiment as viewed from the opening and closing direction. [Figure 18] FIG. 18 is a view showing a cover member according to another embodiment as viewed from the opening and closing direction. [Figure 19] FIG. 19 is a view showing a cover member according to another embodiment as viewed from the opening and closing direction. [Figure 20] FIG. 20 is a diagram showing a first bracket according to another embodiment and a configuration around the first bracket as viewed from the opening / closing direction. [Figure 21] FIG. 21 is a diagram showing a first bracket according to another embodiment and a configuration of its periphery as viewed from the opening / closing direction. [Figure 22] FIG. 22 is a schematic diagram showing the configuration of a conventional elevator door device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, one embodiment of the present invention will be described with reference to FIGS.

[0022] As shown in Fig. 1, an elevator door device according to this embodiment (hereinafter also simply referred to as "door device") is disposed at an opening (car entrance) 12 of an elevator car body 11, and opens and closes the opening 12. Thus, an elevator car 10 according to this embodiment includes the car body 11 and the door device 1.

[0023] Specifically, the door device 1 includes a frame member 2 disposed above the opening 12 in the car body 11. The door device 1 also includes a door rail 3 extending in the opening / closing direction of the opening 12 (left-right direction in FIG. 1), a door section 4 having a first roller (roller) 421 that moves in the opening / closing direction as the first roller 421 rolls on the door rail 3, and a door drive section 5 that drives the door section 4 to open and close. The door device 1 also includes an adhesion suppression section 6 for preventing adhesion of wear powder generated in the door drive section 5 to the door rail 3 and the first roller 421. In the door device 1 of this embodiment, the adhesion suppression section 6 is configured by a part (second portion) 22 of the frame member 2. The door device 1 of this embodiment also includes two door sections 4, and is a so-called center-opening door device in which the door sections 4 approach or move away from each other in the opening / closing direction to open and close the opening 12.

[0024] The frame member 2 extends in the opening / closing direction above the opening 12. Specifically, as shown in Fig. 2, the frame member 2 has a first section 21 that extends in a planar direction perpendicular to the entrance / exit direction of the opening 12 (left / right direction in Fig. 2) and has a door rail 3 disposed on one surface 21a in the entrance / exit direction, and a second section 22 that extends from an upper end of the first section 21 toward the one surface 21a in the entrance / exit direction and also extends in the opening / closing direction. The frame member 2 of this embodiment is formed by bending the upper end of a band-shaped member extending in the opening / closing direction. This frame member 2 is attached above the opening 12 in the car body 11 via an attachment member 13.

[0025] Specifically, the first portion 21 is a rectangular plate-like portion that is long in the opening / closing direction. The dimension of the first portion 21 in the opening / closing direction is greater than the dimension of the car body 11 in the opening / closing direction.

[0026] The second portion 22 is a strip-shaped portion that is long in the opening / closing direction, and extends continuously from one end of the first portion 21 to the other end in the opening / closing direction. In the second portion 22 of this embodiment, the dimension in the ingress / egress direction at each position in the opening / closing direction is the same. The dimension in the ingress / egress direction of the second portion 22 is a size that hides the door rail 3 and the first roller 421 that rolls on the door rail 3 when viewed from above the second portion 22 to the lower side. That is, the second portion 22 extends from the upper end of the first portion 21 to one side (the left side in FIG. 2) of the door rail 3 and the first roller 421 in the ingress / egress direction. The tip of the second portion 22 in the ingress / egress direction of the second portion 22 of this embodiment is located between the first bracket 43 and the first roller 421 of the door hanger 42 in the ingress / egress direction.

[0027] The second portion 22 in this embodiment is disposed at a position where a distance α1 between the second portion 22 and the first roller 421 (more specifically, an upper end of the first roller 421) in the vertical direction is smaller than a diameter of the first roller 421. Moreover, the distance α1 between the second portion 22 and the first roller 421 in the vertical direction is smaller than a distance α2 between the drive pulley 51 (more specifically, a lower end of the drive pulley 51) and the second portion 22.

[0028] Each of the two door sections 4 has a door panel 41, a door hanger 42 for suspending the door panel 41, and a first bracket 43 for connecting the door hanger 42 to the door drive section 5.

[0029] The door panel 41 is a panel member that extends in a plane direction perpendicular to the entry / exit direction, and has a rectangular plate shape that is long in the vertical direction.

[0030] The door hanger 42 has a hanger body 420 to which the door panel 41 is connected, a first roller (roller) 421 that is disposed on the hanger body 420 and rolls on the door rail 3, and a second roller 422 that is disposed on the hanger body 420 and rolls while abutting against the door rail 3 from below. The door hanger 42 of this embodiment has two first rollers 421 and one second roller 422.

[0031] The hanger body 420 is a plate-like portion that is connected to the upper end of the door panel 41 and extends upward from the upper end. The hanger body 420 of this embodiment has a rectangular shape that is elongated in the opening and closing direction.

[0032] Each of the two first rollers 421 is disposed on the hanger body 420 so as to be rotatable about a first rotation axis (rotation axis) 421a extending in the entry / exit direction (i.e., perpendicular to the opening / closing direction and horizontal). These two first rollers 421 are disposed on the hanger body 420 with an interval therebetween in the opening / closing direction and each of them abuts against the door rail 3 from above.

[0033] The second roller 422 is disposed in the hanger body 420 so as to be rotatable about a second rotation shaft 422a extending in the entry / exit direction. The second roller 422 is disposed in the hanger body 420 in a state in which the second roller 422 abuts against the door rail 3 from below so as to sandwich the door rail 3 between the first roller 421 and the second roller 422 in the vertical direction.

[0034] The first bracket 43 is a member extending upward from the hanger body 420, and a tip of the first bracket 43 is connected to the endless belt 55 of the door drive unit 5.

[0035] The door drive unit 5 has a drive pulley 51, a motor unit 50 that rotates and drives the drive pulley 51, a driven pulley 54 that is arranged at a distance from the drive pulley 51 in the opening and closing direction, and an endless belt 55 that is wound around the drive pulley 51 and the driven pulley 54.

[0036] The motor unit 50 is a drive source for moving the door unit 4 in the opening and closing direction, and specifically includes a drive pulley 51 and a motor 53 having a drive shaft 52 for rotating the drive pulley 51. The drive shaft 52 extends in the opening and closing direction, and the motor 53 drives and rotates the drive shaft 52. As a result, the drive pulley 51 connected to the drive shaft 52 rotates around the drive shaft 52. The drive pulley 51 in this embodiment is a pulley provided with a plurality of teeth arranged in the circumferential direction on its peripheral edge.

[0037] In the door device 1 of this embodiment, the position of the door portion 4 in the fully open position and the fully closed position is maintained by the torque of the motor 53 (i.e., the control of the motor 53), and the position of the door portion 4 is not maintained by a mechanical mechanism such as a position maintaining mechanism.

[0038] The motor unit 50 is disposed at the upper end of the frame member 2. The motor unit 50 in this embodiment is attached to the upper end of the frame member 2 (more specifically, to the second portion 22) via the second bracket 23. That is, the door device 1 in this embodiment also has the second bracket 23 for attaching the motor unit 50 to the frame member 2. The motor unit 50 is also disposed outside the opening 12 in the opening / closing direction (see FIG. 1). In this state, the drive pulley 51 is located above the door rail 3 when viewed from the opening / closing direction (see FIG. 2).

[0039] The driven pulley 54 is attached to the upper end of the frame member 2 via the third bracket 24 so as to be rotatable around a rotation axis 54a extending in the entry / exit direction. This driven pulley 54 is disposed at the same position as the drive pulley 51 of the motor unit 50 in the up-down direction. The driven pulley 54 is also disposed outside the opening 12 in the opening / closing direction (the opposite outside of the motor unit 50 (drive pulley 51)). In this state, the driven pulley 54 is located above the door rail 3 when viewed from the opening / closing direction. The driven pulley 54 of this embodiment is a pulley provided with a plurality of teeth arranged in the circumferential direction on its peripheral edge, similar to the drive pulley 51.

[0040] The endless belt 55 is wound around the drive pulley 51 and the driven pulley 54 that are spaced apart in the opening / closing direction. In this wound state, the entire area of ​​the endless belt 55 in the opening / closing direction is located above the door rail 3 when viewed from the opening / closing direction (see FIG. 2). Of the parts of the endless belt 55 wound around the drive pulley 51 and the driven pulley 54 that are located between the two pulleys 51 and 54, the first bracket 43 of one of the two door parts 4 is connected to the upper part (upper part), and the first bracket 43 of the other of the two door parts 4 is connected to the lower part (lower part). The endless belt 55 of this embodiment is a toothed belt.

[0041] The adhesion prevention unit 6 is a member or portion that is disposed between the endless belt 55 and the door rail 3 and first roller 421 in the vertical direction and blocks wear powder that falls from the endless belt 55, thereby preventing the wear powder from adhering to (reaching) the door rail 3 and the first roller 421. The adhesion prevention unit 6 is disposed between the drive pulley 51 and the door rail 3 and the first roller 421 when viewed from the opening / closing direction, and is disposed at a position that corresponds at least to the drive pulley 51 in the opening / closing direction.

[0042] As described above, the adhesion prevention portion 6 of the present embodiment is configured by a part of the frame member 2 (specifically, the second portion 22 of the frame member 2). Therefore, the adhesion prevention portion 6 is formed in a range including the arrangement range of the endless belt 55 in the opening and closing direction.

[0043] In the door device 1 configured as described above, the motor 53 of the door drive unit 5 drives and rotates the drive pulley 51 around the drive shaft 52, causing the endless belt 55 wrapped around the drive pulley 51 and the driven pulley 54 to rotate. In other words, the upper and lower parts of the endless belt 55 move in opposite directions in the opening and closing direction, causing the door parts 4 (door panels 41) connected to the upper and lower parts to move away from or approach each other along the door rail 3, resulting in the opening 12 of the car body 11 being opened and closed.

[0044] During opening and closing of the door device 1, the teeth of the endless belt 55 mesh with the teeth of the pulleys 51 and 54, causing wear and generating wear powder at the portions of the endless belt 55 corresponding to the pulleys 51 and 54. In particular, the amount of wear powder generated at the portion of the endless belt 55 corresponding to the drive pulley 51 is significant because this is the portion to which the rotational driving force from the motor 53 is transmitted. The wear powder generated from the endless belt 55 in this manner falls downward.

[0045] In this case, the door device 1 of this embodiment is an elevator door device 1, and includes a door rail 3 extending in the opening and closing direction of a door panel 41, the door panel 41, and a first roller (roller) 421 that can rotate around a first rotation axis (rotation axis) 421a that is perpendicular to the opening and closing direction and extends horizontally, and the first roller 421 moves in the opening and closing direction as the first roller 421 rolls on the door rail 3, a door drive unit 5 that drives the door unit 4 in the opening and closing direction, and an adhesion prevention unit 6 (in the example of this embodiment, the second part 22) extending in the opening and closing direction. The door drive unit 5 has a drive pulley 51, a motor unit 50 which rotates and drives the drive pulley 51, a driven pulley 54 which is arranged at a distance from the drive pulley 51 in the opening and closing direction, and an endless belt 55 which is wound around the drive pulley 51 and the driven pulley 54 and to which the door unit 4 is connected, the door rail 3 is located below the drive pulley 51 when viewed from the opening and closing direction, and the adhesion prevention unit 6 (second portion 22) is located between the drive pulley 51 and the door rail 3 and the first roller 421 when viewed from the opening and closing direction, and is located at a position corresponding to the drive pulley 51 in the opening and closing direction.

[0046] In this way, by arranging the adhesion prevention portion 6 (second portion 22) between the drive pulley 51 and the door rail 3 and first roller 421 located below the drive pulley 51 at a position corresponding to the drive pulley 51 in the opening and closing direction, adhesion of wear powder that has fallen from the endless belt 55 (the portion wrapped around the drive pulley 51 and its vicinity) to the door rail 3 and first roller 421 is suppressed.

[0047] Furthermore, in the door device 1 of this embodiment, the adhesion prevention portion 6 (second portion 22) is disposed between the driven pulley 54 and the door rail 3 and first roller 421 as viewed from the opening / closing direction, and also at a position corresponding to the driven pulley 54 in the opening / closing direction. This also prevents wear powder that has fallen from the endless belt 55 (the portion wound around the driven pulley 54 and its vicinity) from adhering to the door rail 3 and the first roller 421.

[0048] Furthermore, in the door device 1 of this embodiment, the adhesion prevention portion 6 (second portion 22) is disposed between the endless belt 55 and the door rail 3 and the first roller 421 as viewed from the opening / closing direction over the entire arrangement area of ​​the endless belt 55 in the opening / closing direction. This also prevents wear powder that falls from the endless belt 55 at positions where the pulleys 51 and 54 are not present from adhering to the door rail 3 and the first roller 421.

[0049] Moreover, in the door device 1 of this embodiment, the adhesion prevention part 6 (second portion 22) is disposed between the drive pulley 51 and the second roller 422 located below the drive pulley 51 as viewed from the opening / closing direction. This also prevents wear powder that has fallen from the endless belt 55 (the portion wound around the drive pulley 51 and its vicinity) from adhering to the second roller 422.

[0050] Furthermore, in the door device 1 of this embodiment, the adhesion prevention unit 6 has a dimension in the in-out direction (direction of the first rotation shaft (rotation shaft) 421a of the first roller 421) that hides the door rail 3 and the first roller (roller) 421 when viewed downward from the position of the drive pulley 51. Therefore, wear powder that has fallen from the endless belt 55 (the portion wrapped around the drive pulley 51 and its vicinity) is less likely to reach the door rail 3 and first roller 421 located below, and this effectively prevents the adhesion of wear powder to the door rail 3 and first roller 421.

[0051] Moreover, in the door device 1 of this embodiment, the adhesion prevention part 6 has a dimension in the in-out direction that hides the second roller 422 when viewed downward from the position of the drive pulley 51. Therefore, wear powder that has fallen from the endless belt 55 (the portion wrapped around the drive pulley 51 and its vicinity) is unlikely to reach the second roller 422 located below, and therefore adhesion of wear powder to the second roller 422 is also effectively suppressed.

[0052] The door device 1 of this embodiment includes a frame member 2 extending in the opening / closing direction, and the frame member 2 has a first portion 21 extending in a plane direction perpendicular to the direction of the first rotation shaft 421a of the first roller 421 and having the door rail 3 disposed on one surface 21a in the direction of the first rotation shaft 421a, and a second portion 22 extending from the upper end of the first portion 21 toward the one surface 21a in the direction of the first rotation shaft 421a and extending in the opening / closing direction. In the door device 1 of this embodiment, the second portion 22 of the frame member 2 constitutes the adhesion suppression portion 6. In this way, by forming the adhesion suppression portion 6 using a part (second portion) 22 of the member (frame member) 2 on which the door rail 3 is disposed, it becomes easier to reduce the number of parts and simplify the configuration.

[0053] It should be noted that the elevator door device of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the present invention. For example, the configuration of one embodiment can be added to the configuration of another embodiment, or part of the configuration of one embodiment can be replaced with the configuration of another embodiment. Furthermore, part of the configuration of one embodiment can be deleted.

[0054] The door device 1 in the above embodiment is disposed on the car body 11 so as to open and close the opening 12 of the car body 11, but is not limited to this configuration. The door device 1 may be disposed on an opening of a landing (i.e., an opening that communicates between the landing and the elevator shaft) and may open and close the opening.

[0055] Further, the door device 1 in the above embodiment is a so-called center-opening type, but is not limited to this configuration. The door device 1 may be a so-called single-opening type.

[0056] In the door device 1 of the above embodiment, the adhesion prevention portion 6 is configured by a part (second portion) 22 of the frame member 2, but is not limited to this configuration. The adhesion prevention portion 6 may be configured by a part of a member other than the frame member 2, an independent member, etc.

[0057] In addition, the specific shape of the adhesion suppression portion 6 is not limited. In the above embodiment, the adhesion suppression portion 6 (second portion 22) extends from the first portion 21 to the outside of the door rail 3 and the first roller 421 in the entry / exit direction, but is not limited to this configuration. When viewed from above to below the adhesion suppression portion 6, the adhesion suppression portion 6 may extend to a position where the tip of the adhesion suppression portion 6 in the entry / exit direction overlaps with a part of the door rail 3 and the first roller 421. Even with this configuration, the adhesion suppression portion 6 prevents at least a part of the wear powder that falls from the endless belt 55 from moving toward the door rail 3 and the first roller 421, thereby suppressing adhesion of the wear powder to the door rail 3 and the first roller 421.

[0058] In addition, although the adhesion prevention part 6 in the above embodiment extends straight from the first part 21 in the inward / outward direction, the present invention is not limited to this configuration. As shown in Figs. 3 to 5, the tip of the adhesion prevention part 6 (second part 22) in the inward / outward direction (direction of the first rotating shaft 421a) may extend downward or in an inclined direction that is positioned downward as it advances toward the tip. In this way, by extending the tip of the adhesion prevention part 6 in the inward / outward direction downward or in the inclined direction (downward direction), it becomes more difficult for wear powder that has fallen from the endless belt 55 to reach the door rail 3 and rollers 421, 422 located below, and adhesion of wear powder to the door rail 3 and rollers 421, 422 is more effectively suppressed.

[0059] In this case, it is preferable that the vertical position of the tip 6a of the adhesion prevention portion 6 is located at or near the upper end position of the first roller 421 (see FIG. 4), and it is more preferable that the vertical position of the tip 6a is located below the upper end of the first roller 421 (see FIG. 5). The lower the tip 6a is located, the more difficult it becomes for wear powder that has fallen from the endless belt 55 to reach the door rail 3 and the first roller 421 (i.e., the more difficult it becomes for powder to adhere to them).

[0060] 6 to 8, the tip of the adhesion preventive section 6 in the insertion / removal direction may extend upward or in an inclined direction that is positioned upward as it proceeds toward the tip. In this way, by having the tip of the adhesion preventive section 6 in the insertion / removal direction extend upward or in the inclined direction (rising tip direction), wear powder that has fallen from the endless belt 55 is accumulated (retained) on the adhesion preventive section 6, and the fall of wear powder into the elevator shaft, etc. can be suppressed.

[0061] In this way, when the tip of the adhesion prevention part 6 in the insertion / removal direction extends upward, or in an inclined direction that moves upward as it progresses toward the tip, the adhesion prevention part 6 may be arranged (formed) only at positions corresponding to each pulley 51, 54 in the opening / closing direction (the dotted areas in Figure 9), as shown in Figure 9.

[0062] 10 to 13, the adhesion prevention unit 6 may be configured to be able to place an open-topped container B thereon. Specifically, the adhesion prevention unit 6 has a bottom wall 60 extending horizontally, a front wall 61 extending upward from one edge of the bottom wall 60 in the entry / exit direction, and a rear wall 62 extending upward from the other edge of the bottom wall 60 in the entry / exit direction.

[0063] The bottom wall 60 is a part fixed to the frame member 2 (more specifically, the second part 22), and is a rectangular plate that is elongated in the opening / closing direction in a plan view. The front wall 61 is a rectangular plate that is elongated in the opening / closing direction when viewed from the entrance / exit direction. The dimension of the front wall 61 in the opening / closing direction is smaller than the dimension of the bottom wall 60 in the opening / closing direction, and the front wall 61 is disposed in the center of the bottom wall 60 in the opening / closing direction. The rear wall 62 is a rectangular plate that is elongated in the opening / closing direction when viewed from the entrance / exit direction, and the dimension in the opening / closing direction is the same as the dimension of the bottom wall 60 in the opening / closing direction.

[0064] According to this configuration, wear powder that falls from the endless belt 55 can be collected in the container B. In addition, the use of the container B makes it easy to dispose of the wear powder. In this case, it is preferable that the adhesion prevention unit 6 is configured to be able to hold the container B.

[0065] In the door device 1 of the above embodiment, the adhesion prevention portion 6 is disposed at the upper end of the frame member 2, but the present invention is not limited to this configuration. The adhesion prevention portion 6 may be configured to be disposed between the drive pulley 51 and the upper end of the frame member 2 in the vertical direction, as shown in Figs. 14 to 19, for example. For example, as follows.

[0066] The door device 1 includes a cover member 7 attached to the motor unit 50, and a part or all of this cover member 7 may constitute the adhesion prevention unit 6. Specifically, this cover member 7 has a fixing unit 71 for fixing the cover member 7 to the motor unit 50 or the frame member 2, the adhesion prevention unit 6, and a scattering prevention unit 72 for preventing scattering of wear powder in the inflow and outflow directions.

[0067] The fixing portion 71 is fixed to the frame member 2, the second bracket 23, the casing of the motor 53, etc. by means of fastening members such as bolts, welding, or the like.

[0068] The adhesion prevention part 6 is a plate-like part extending from the upper end of the fixing part 71, and may extend in the in / out direction as viewed from the opening / closing direction (see Figs. 14, 16, and 17), or may extend in an inclined direction (upwardly extending) that is positioned upward as it advances toward the tip side (see Figs. 18 and 19). The cover member 7 may also be configured without the scattering prevention part 72. That is, the cover member 7 may be configured by the fixing part 71 and the adhesion prevention part 6.

[0069] As described above, by positioning the adhesion prevention section 6 close to the drive pulley 51 in the vertical direction, the adhesion prevention section 6 prevents the wear powder from moving toward the door rail 3 and first roller 421 immediately after it falls from the endless belt 55 (i.e., before the area over which the wear powder falls expands: see the arrow in Figure 15), thereby more effectively preventing the adhesion of the wear powder to the door rail 3 and first roller 421.

[0070] The adhesion prevention portion 6 does not have to be constituted by only one member, that is, by only the portion 22 of the frame member 2 or by only the portion 6 of the cover member 7. For example, the adhesion prevention portion 6 may include both the portion 22 of the frame member 2 and the portion 6 of the cover member 7.

[0071] In the door device 1 of the above embodiment, the endless belt 55 is a toothed belt, but is not limited to this configuration. The endless belt 55 may be another type of belt, such as a V-belt.

[0072] In the door device 1 of the above embodiment, the first bracket 43 connecting the hanger body 420 and the endless belt 55 extends straight upward from one surface 420a of the hanger body 420 (see Figs. 1 and 2), but is not limited to this configuration. As shown in Fig. 20, the first bracket 43 may be bent so as to protrude to one side in the ingress / egress direction (left side in Fig. 20) at a position corresponding to the adhesion prevention part 6 (second part 22) in the up-down direction. In addition, the first bracket 43 may extend upward at a position spaced from one surface 420a of the hanger body 420 on one side in the ingress / egress direction (see Fig. 21). With such a configuration, it is easy to ensure the dimension of the adhesion prevention part 6 in the ingress / egress direction. [Explanation of symbols]

[0073] 1...door device, 2...frame member, 21...first portion, 21a...one side, 22...second portion (adhesion prevention portion), 23...second bracket, 24...third bracket, 3...door rail, 4...door portion, 41...door panel, 42...door hanger, 420...hanger body, 421...first roller (roller), 421a...first rotating shaft (rotating shaft), 422...second roller, 422a...second rotating shaft, 43...first bracket, 5...door drive portion, 50...motor portion, 51...drive pulley, 52...drive shaft, 53...motor, 54 ... driven pulley, 54a... rotating shaft, 55... endless belt, 6... adhesion prevention portion, 6a... tip, 7... cover member, 71... fixed portion, 72... scattering prevention portion, 10... cage, 11... cage body, 12... opening, 13... mounting member, 100... door device, 100a... cage entrance / exit, 100b... frame, 101... door rail, 102... door portion, 103... door hanger, 103a... roller, 104... door panel, 105... door drive portion, 106... drive pulley, 107... motor, 108... driven pulley, 109... belt, B... container

Claims

1. An elevator door device, comprising: A door rail extending in the opening and closing direction of the door panel; a door section including the door panel and a roller rotatable about a rotation axis perpendicular to the opening / closing direction and extending in a horizontal direction, the roller rolling on the door rail to move in the opening / closing direction; a door driving unit that drives the door unit in the opening and closing direction; An adhesion prevention portion extending in the opening and closing direction, The door drive unit is A motor unit having a drive pulley and rotating the drive pulley; a driven pulley disposed at an interval in the opening / closing direction relative to the driving pulley; an endless belt that is wound around the drive pulley and the driven pulley and to which the door part is connected; The door rail is located below the drive pulley when viewed from the opening / closing direction, An elevator door device, wherein the adhesion prevention portion is disposed between the drive pulley and the door rail and the roller when viewed from the opening / closing direction, and is disposed at a position corresponding to the drive pulley in the opening / closing direction.

2. 2. The elevator door device according to claim 1, wherein the adhesion prevention portion has a dimension in a direction of a rotation axis of the roller such that the door rail and the roller are hidden when viewed downward from the position of the drive pulley.

3. A frame member extending in the opening and closing direction is provided, The frame member includes: a first portion that extends in a planar direction perpendicular to a rotation axis direction of the roller and has one surface in the rotation axis direction on which the door rail is disposed; a second portion extending from an upper end of the first portion toward the one surface side in the rotation axis direction and extending in the opening / closing direction, The elevator door device according to claim 1 or 2, wherein the second portion constitutes the adhesion prevention portion.

4. 4. The elevator door device according to claim 3, wherein a tip end portion of the second portion in the direction of the rotation axis extends downward or in an inclined direction that becomes gradually lower as it advances toward the tip end.

5. A frame member extending in the opening and closing direction is provided, the motor unit is disposed at an upper end of the frame member, The elevator door apparatus according to claim 1 or 2, wherein the adhesion prevention portion is disposed between the drive pulley and an upper end of the frame member in the vertical direction.

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