Elevator

Abstract

To provide an elevator capable of suppressing meandering of a closing belt for closing a sill groove of an elevator door.SOLUTION: The elevator 10 (see FIG. 1) includes the sill groove blocking mechanism 60 that blocks the sill groove 52 by fitting the left-side blocking band 38B into the sill groove 52 that guides the door shoe 61L attached to the door lower end portion along with the opening operation of the left door 32, and retracts the left-side blocking band 61L from the sill groove 52 along with the closing operation of the left door 32, the sill groove blocking mechanism 60 includes the lower guide roller 61L that guides the left-side blocking band 67B to the sill groove 52, and the lower guide roller 67B is configured such that the width-direction central portion has a larger radius than the width-direction both end portions.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an elevator, and more particularly to an elevator equipped with a blocking strip that blocks a threshold groove that guides an elevator door. [Background technology]

[0002] Elevator entrances have threshold grooves to guide the door shoes attached to the bottom of the doors when the doors open and close. If pebbles, dust, or other foreign objects accumulate in the threshold groove, they can impede the opening and closing of the elevator doors and cause problems with elevator operation. For this reason, some elevators have through-holes in the threshold groove to allow foreign objects to escape, preventing the accumulation of foreign objects in the threshold groove.

[0003] However, if a through-hole is provided in the threshold groove, if a passenger drops a bicycle key or the like, the key is likely to fall through the through-hole into the elevator shaft. For this reason, it is difficult to provide a large through-hole in the threshold groove in conventional elevators, which poses the problem of not being able to adequately prevent foreign objects from accumulating in the threshold groove.

[0004] On the other hand, some elevators have threshold grooves that are blocked when elevator doors such as hall doors and car doors are open, making it difficult for foreign objects to enter the threshold grooves.

[0005] For example, Patent Document 1 discloses an elevator in which a blocking belt, housed in the shaft side of the elevator door and one end of which is connected to the center of the threshold groove, is pulled out in conjunction with the opening of the door and guided into the threshold groove by a guide roller attached to the lower end of the door, thereby temporarily blocking the threshold groove. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2021-147171 Summary of the Invention [Problem to be solved by the invention]

[0007] In the elevator described in Patent Document 1 above, there is a problem in that the blocking belt sent out into the threshold groove via the guide roller may snake, and when the blocking belt snakes, it does not fit smoothly into the threshold groove, which can easily cause problems with the opening and closing operation of the elevator door.

[0008] An object of the present invention is to provide an elevator that can suppress meandering of a blocking strip that blocks the threshold groove of an elevator door. [Means for solving the problem]

[0009] The elevator of the present invention is an elevator equipped with a threshold groove blocking mechanism in which a blocking belt fits into a threshold groove that guides a door shoe attached to the lower end of the door as the elevator door opens, blocking the threshold groove, and the blocking belt retracts from the threshold groove as the door closes.The threshold groove blocking mechanism includes a first guide roller that guides the blocking belt into the threshold groove, and the first guide roller is configured so that the diameter at the center in the width direction is larger than at both ends in the width direction.

[0010] In the elevator of the present invention, the threshold groove blocking mechanism includes a second guide roller upstream of the first guide roller in the sending direction in which the blocking strip is sent toward the threshold groove, and the second guide roller may be arranged so as to contact the surface of the blocking strip opposite to the surface in contact with the first guide roller.

[0011] In the elevator of the present invention, the second guide roller may be configured so that the diameter of the central portion in the width direction is larger than the diameter of both end portions in the width direction. [Effects of the Invention]

[0012] In the elevator according to the present invention, the first guide roller is configured so that its diameter is larger at the widthwise center than at both widthwise ends. This causes the peripheral speed of the first guide roller to be faster at the widthwise center than at both widthwise ends. As a result, the occlusion zone is drawn to the widthwise center of the first guide roller, where the peripheral speed is faster, and is sent downstream in the moving direction. As a result, meandering of the occlusion zone can be suppressed. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing the overall configuration of an elevator according to one embodiment of the present invention. [Figure 2] FIG. 2 is a configuration diagram of the hall door included in FIG. 1 as seen from the elevator shaft side. [Figure 3] FIG. 3 is a diagram schematically illustrating a state in which the hall door shown in FIG. 2 is open. [Figure 4] Fig. 4(a) is a diagram showing the configuration of the lower guide roller and the left occlusion belt when viewed from the direction A shown in Fig. 3. Fig. 4(b) is a diagram showing a modified example of the lower guide roller shown in Fig. 4(a). DETAILED DESCRIPTION OF THE INVENTION

[0014] An elevator 10 according to one embodiment of the present invention will be described below with reference to the drawings. In each drawing, "X" indicates a horizontal direction X that is substantially perpendicular to the axial direction of the sheave 18A, "Y" indicates a horizontal direction Y that is perpendicular to the horizontal direction X, and "Z" indicates a vertical direction Z.

[0015] Fig. 1 is a diagram showing the schematic configuration of an elevator 10. As shown in Fig. 1, the elevator 10 is a traction-type rope elevator, and includes a car 20 suspended from one end of a main rope 12, and a counterweight (not shown) suspended from the other end of the main rope 12. The main rope 12 is stretched across a sheave 18A and a deflector sheave 18B of a hoisting machine 18 installed in a machine room M directly above a hoistway 17, and has the function of relatively raising and lowering the car 20 and the counterweight (not shown) by rotating the sheave 18A forward or backward using a hoisting machine motor (not shown).

[0016] The car 20 has a car door 21 on the front side. The elevator 10 also has hall doors 30-1, 30-2, 30-3, ... (hereinafter simply referred to as hall doors "30") at halls N1, N2, N3, ... (hereinafter simply referred to as hall doors "30" unless there is a need to distinguish between them) on each floor. These hall doors (elevator doors) 30 are doors that open both left and right, like the car doors 21, and are installed in positions that face each other when the car 20 stops at the hall N.

[0017] Fig. 2 is a diagram showing the configuration of the landing door 30 as seen from inside the elevator shaft 17. As shown in Fig. 2, the landing door 30 is made up of left and right doors 32, 34, and is suspended from a guide rail 42 via hangers 32A, 34A attached to the upper part. Since the configurations of the hangers 32A, 34A are the same, the following description will mainly focus on the hanger 32A, and a description of the hanger 34A will be omitted where appropriate. The hanger 32A is provided with rotatable rollers 32A-1, 32A-2 at both left and right ends, and is suspended from the guide rail 42 via the rollers 32A-1, 32A-2 so as to be movably suspended in the horizontal direction Y.

[0018] An interlocking mechanism 40 for the landing door 30 is provided above each hanger 32A, 34A, and is composed of a pair of rollers 43, 44 and a rope 46 stretched between the rollers 43, 44. The rope 46 forms a loop LP by being stretched between the rollers 43, 44. The hanger 34A supporting the right door 34 is connected to an upper portion 46U of the rope 46 that forms the loop LP via a connecting plate PL2, and the hanger 32A supporting the left door 32 is connected to a lower portion 46D of the rope 46 via a connecting plate PL1. Therefore, when one of the left and right doors 32, 34 moves, the other door moves in the direction opposite to the movement direction of the other door. With this configuration, the landing door 30 can be opened and closed in a left-right swinging manner. Furthermore, when the elevator car 20 has landed at the landing N, one of the hall doors 30 moves in the horizontal direction Y in conjunction with the opening and closing operation of the car door 21 via an engagement means (not shown). Therefore, the hall door 30 opens and closes in conjunction with the opening and closing operation of the car door 21.

[0019] Door shoes 38A, 38B are connected to both ends of the lower end of the left door 32 via plates 36A, 36B, respectively. Each door shoe 38A, 38B is made of rubber, resin, or the like, and is guided in the horizontal direction Y along a threshold groove 52 provided in a metal threshold 50 installed at the landing N. Similarly to the left door 32, door shoes 37A, 37B are provided at both ends of the lower end of the right door 34, and both door shoes 37A, 37B are guided in the horizontal direction Y along the threshold groove 52.

[0020] Next, the configuration of the lower end portion of the landing door 30 will be described with reference to Fig. 3. Fig. 3 is a diagram showing the configuration when the landing door 30 shown in Fig. 2 is in an open state. In Fig. 3, the threshold 50 is shown in a state cut along a plane approximately parallel to the YZ plane.

[0021] As shown in FIG. 3 , the landing door 30 is equipped with a threshold groove closing mechanism 60. This threshold groove closing mechanism 60 includes a closing belt 61 that serves to close the threshold groove 52, and storage units 62 and 63 that move the closing belt 61 in accordance with the opening and closing operation of the landing door 30. The closing belt 61 serves to close the threshold groove 52 to prevent foreign objects such as pebbles from getting in when the landing door 30 is opened, and is a long member made of a flexible member such as rubber or synthetic resin and having a substantially rectangular cross section. Furthermore, the synthetic resin may be nylon resin, polyethylene resin, or fluororesin. Using a fluororesin member for the closing belt 61 has the advantage that, when the closing belt 61 fits into the threshold groove 52, it rubs against the side wall of the threshold groove 52, which reduces the generation of wear debris.

[0022] In addition, the central portion of the blocking band 61 is connected and fixed to the longitudinal central portion of the threshold groove 52 using a fixing device BR or a bolt (not shown).

[0023] Here, the blocking band 61 located closer to the left door 32 than the fixing device BR will be referred to as the left blocking band 61L, and the blocking band 61 located closer to the right door 34 than the fixing device BR will be referred to as the right blocking band 61R.

[0024] As shown in Figure 3, storage unit 62 has the role of sequentially sending out left occlusion belt 61L so that it fits into threshold groove 52 as left door 32 opens, and lifting and storing left occlusion belt 61L as door 32 closes. Storage unit 63 has the same configuration as storage unit 62, and sequentially sends out right occlusion belt 61R into threshold groove 52 as right door 34 opens, and lifts and stores right occlusion belt 61R as door 34 closes. As mentioned above, storage units 62 and 63 have the same configuration, so the following explanation will mainly focus on storage unit 62, and explanation of storage unit 63 will be omitted as appropriate.

[0025] The storage unit 62 includes the above-mentioned left closure belt 61L, a weight 68 connected to one end of the left closure belt 61L via a rope 65, and a guide 69 that guides the weight 68 in the vertical direction. The storage unit 62 also has lifting rollers 66A, 66B, a middle guide roller (second guide roller) 67A, and a lower guide roller (first guide roller) 67B that are each rotatably supported on the side surface 32P of the left door 32 facing the elevator shaft 17.

[0026] The lifting roller 66A is disposed directly above the guide 69, and the lifting roller 66B is disposed adjacent to the right side of the lifting roller 66A. Both lifting rollers 66A, 66B serve to suspend the weight 68 and the left occlusion belt 61L via the rope 65 so that they can move up and down relative to each other. The middle guide roller 67A is disposed adjacent to the lower end of the guide 69 disposed directly below the lifting roller 66A, and the lower guide roller 67B is disposed at the lower right end of the left door 32 adjacent to the plate 36B (the lower end on the end side that abuts against the right door 34). The left occlusion belt 61L is disposed so as to reach the guide 69 via the rollers 66A, 66B, 67A, and 67B when the left door 32 is closed.

[0027] The lower guide roller 67B has the role of sending the left occlusion belt 61L so that it fits into the threshold groove 52 as the left door 32 opens, and also of pulling the left occlusion belt 61L out of the threshold groove 52 and retracting it as the door 32 closes.

[0028] Figure 4(a) is a diagram showing the configuration of the lower guide roller 67B and the left closure band 61L when viewed from the direction A shown in Figure 3. As shown in Figure 4(a), the lower guide roller 67B is rotatably attached directly above the threshold groove 52 via a support shaft AX provided on the side surface 32P of the left door 32, and is a barrel-shaped roller (so-called crown roller) with a diameter larger at the center than at both ends, and has a substantially symmetrical shape.

[0029] The inventors conducted extensive research and found that when the shape of the lower guide roller 67B is formed so that the diameter D1 at the center is greater than the diameters D2 and D3 at both ends, as in this embodiment, the peripheral speed of the peripheral surface of the lower guide roller 67B is faster at the center than at both ends. Here, the peripheral speed refers to the speed calculated by multiplying the diameter of the lower guide roller 67 by the circle ratio and the number of rotations of the roller 67 per unit time.

[0030] Therefore, the left occluding belt 61L is fed out while being drawn to the center of the lower guide roller 67B, which makes it possible to prevent the left occluding belt 61L from meandering.

[0031] Furthermore, the intermediate guide roller 67A is positioned slightly to the left of the lower guide roller 67B in a plan view, and is configured to contact the surface of the left occlusion belt 61L opposite to the surface that the lower guide roller 67B contacts. This intermediate guide roller 67A has the role of feeding the left occlusion belt 61L to or from the lower guide roller 67B in a slightly warped state. Because the left occlusion belt 61L is made of a flexible member as described above, it moves in a substantially L-shaped curved state (which can also be expressed as a warped state) between the lower guide roller 67B and the intermediate guide roller 67A, which are positioned relatively close to each other, causing the left occlusion belt 61L to apply a biasing force to both guide rollers 67A, 67B.

[0032] As a result, the left occlusion belt 61L can be moved while being pressed against the lower guide roller 67B, thereby enhancing the effect of the lower guide roller 67B in suppressing meandering of the left occlusion belt 61L. Also, as shown in Figure 3, the intermediate guide roller 67A is positioned below the position of one end of the left occlusion belt 61L that is connected to the rope 65 when the left door 32 is open. As a result, the left occlusion belt 61L is smoothly guided via the intermediate guide roller 67A even when the left door 32 is open.

[0033] Furthermore, as described above, when the left occlusion belt 61L is pulled out from the threshold groove 52 while being alternately sandwiched between the two guide rollers 67A, 67B, or when the left occlusion belt 61L is sent into the threshold groove 52, it is possible to suppress the swinging of the left occlusion belt 61L that accompanies the opening and closing operation of the left door 32. As a result, there is also the advantage that the swinging of the left occlusion belt 61L can be prevented from coming off the two guide rollers 67A, 67B.

[0034] The intermediate guide roller 67A may also be a barrel-shaped roller having the same configuration as the lower guide roller 67B described above. In this case, the effect of suppressing meandering in the left occlusion zone 61L can be obtained not only by the lower guide roller 67B but also by the intermediate guide roller 67A.

[0035] The lifting rollers 66A, 66B may be rollers with flanges (which may also be expressed as flanged rollers), which can prevent the left occluding belt 61L from falling off when the left occluding belt 61L is sent out or stored.

[0036] The weight 68 has the role of applying tension to the left occlusion belt 61L via the rope 65. The guide 69 is a long, substantially U-shaped member extending along the vertical direction Z, and has the role of guiding the weight 68 along the vertical direction Z and restricting the relative movement of the weight 68 with respect to the left door 32 in the horizontal direction Y.

[0037] In this embodiment, the guide 69 is made up of a substantially U-shaped elongated member, but a guide made up of a pipe-shaped elongated member may be used instead of the guide 69. In this case, the weight 68 can be moved (guided) in the space inside the pipe-shaped guide along the vertical direction Z to obtain the same effect as the guide 69 of this embodiment.

[0038] Therefore, the weight 68 is held in a state in which it can move mainly only in the vertical direction Z. As a result, it is possible to prevent the weight 68 from swinging in the horizontal direction Y relative to the left door 32 as the left door 32 opens and closes.

[0039] The threshold 50 is provided with a threshold groove 52, which has a substantially U-shaped cross section when cut on the XZ plane, extending in the longitudinal direction, i.e., along the horizontal direction Y. This threshold groove 52 has discharge holes (not shown) provided in multiple locations on the bottom surface. This allows foreign objects such as pebbles that fall into the threshold groove 52 to be discharged through the discharge holes (not shown) into the elevator shaft 17, preventing foreign objects such as pebbles from accumulating in the threshold groove 52.

[0040] In the elevator 10 of this embodiment, the lower guide roller 67B is configured so that the diameter D1 at the widthwise center is larger than the diameters D2 and D3 at both widthwise ends. As a result, the peripheral speed of the lower guide roller 67B is faster at the widthwise center than at both widthwise ends. Therefore, the left occlusion belt 61L is pulled toward the widthwise center of the lower guide roller 67B, which has a faster peripheral speed, and is sent downstream in the moving direction. As a result, meandering of the left occlusion belt 61L can be suppressed.

[0041] Next, a lower guide roller 77B, which is a modification of the lower guide roller 67B, will be described using FIG. 4(b). In FIG. 4(b), components identical to those in the above embodiment are designated by the same reference numerals as appropriate. As shown in FIG. 4(b), the lower guide roller 77B has the same configuration as the lower guide roller 77B in the above embodiment, except for its attachment position relative to the left door 32. The lower guide roller 77B is attached to the side surface 32P of the left door 32 so that the vertical position of the lowermost peripheral surface in the center is slightly lower than the vertical position of the opening edge 52P of the threshold groove 52, or is at the same vertical position as the opening edge 52P. This allows the left occlusion belt 61L to fit more securely within the threshold groove 52.

[0042] In addition, in the above embodiment, an example has been described in which the landing door 30 is provided with the threshold groove closing mechanism 60, but the present invention is not limited to this. For example, the car door 21 may be provided with the threshold groove closing mechanism. In this case, too, the same effects as those of the above embodiment can be obtained.

[0043] The present invention can be implemented in various forms, including improvements, modifications, and variations based on the knowledge of those skilled in the art, without departing from the spirit of the invention. Furthermore, the invention can be implemented in a form in which any of the features of the invention are replaced with other technology, as long as the same action or effect is achieved. [Explanation of symbols]

[0044] 10 Elevator 12 Main rope 17 Elevator shaft 20 Car 30, 30-1, 30-2, 30-3 Landing doors (elevator doors) 32 Left door 32P side 37A, 37B, 38A, 38B door shoes 50 Threshold 52 Threshold groove 52P open end 60 Threshold groove closing mechanism 61 Zonula occludens 61L Left occluder 61R Right occluder 62,63 Storage Unit 65 Rope 67A Intermediate guide roller (second guide roller) 67B Lower guide roller (first guide roller) D1,D2,D3 diameter X,Y horizontal direction Z vertical direction

Claims

1. An elevator equipped with a threshold groove closing mechanism in which a blocking belt fits into a threshold groove that guides a door shoe attached to a lower end of the elevator door as the elevator door opens, thereby closing the threshold groove, and the blocking belt retracts from the threshold groove as the elevator door closes, The threshold groove closing mechanism includes a first guide roller that guides the closing band into the threshold groove, and the first guide roller is configured so that the diameter of the widthwise center portion is larger than that of the widthwise end portions. Elevator.

2. The threshold groove closing mechanism includes a second guide roller upstream of the first guide roller in the feeding direction in which the closure band is fed toward the threshold groove, and the second guide roller is arranged to contact the surface of the closure band opposite to the surface that the first guide roller contacts.

2. The elevator of claim 1.

3. The second guide roller is configured so that the diameter at the center in the width direction is larger than the diameter at both end portions in the width direction.

3. The elevator of claim 2.

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