Elevator system

Abstract

An object of the present invention is to provide an elevator apparatus in which it is not necessary to secure a large space in a height direction above an upper pulley, and the upper pulley can be disposed at a height substantially equal to that of a sheave.SOLUTION: The elevator device includes a hoisting machine 102 having a sheave 102a, a counterweight 105, lower pulleys 251 suspended from machine beams 103 via lower pulley support bases 252, upper pulleys 201 installed above the lower pulleys 251, upper pulley support beams 202 supporting the upper pulleys 201, and a main rope 107. A sheave 102a portion of the hoisting machine 102 and the upper pulley 201 are arranged such that their center heights substantially coincide with each other, and the upper-pulley support beams 202 support the upper pulley 201 at a position lower than an upper end of the upper pulley 201.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] In the elevator system of Patent Document 1, one end of the rope extending from the sheave toward the car first extends downward along the back surface of the first weight rail and is then raised by a lower return pulley attached to a lower return pulley mount. The rope then changes direction by 90 degrees and is guided along the side wall of the hoistway 1 by the first upper return pulley and the second upper return pulley. The rope then descends directly under the second upper return pulley and suspends the car via the first car hoisting pulley and the second car hoisting pulley attached to the bottom of the car, and the rope raised by the second hoisting pulley is secured by a car-side rope stopper (see paragraph 0018 and Figures 1 to 3). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-26976 Summary of the Invention [Problem to be solved by the invention]

[0004] It is known that narrow spacing between the sheaves and return sheaves on which the ropes are hung has an adverse effect on rope fatigue, and in some regions, standards require a certain spacing between them. Patent Document 1 does not specifically describe the support structure for the first upper return sheave and the second upper return sheave.

[0005] Fig. 5 is a vertical cross-sectional view showing the configuration of an elevator apparatus 100' according to a comparative example of the present invention. Fig. 6 is a horizontal cross-sectional view showing the configuration of an elevator apparatus 100' according to a comparative example of the present invention. 5 and 6, the support structure for the upper return pulley (upper pulley) 201 can be such that it is suspended from the upper return pulley support beam via a rod 205. In this case, however, for example, there is only a space S1 in the height direction above the upper pulley 201 and the upper pulley support beam 202, making it difficult to place a winch for suspending the upper pulley 201 and the upper pulley support beam 202 in this space S1, and thus making it difficult to install the upper pulley 201. Of course, it is possible to make the space in the height direction larger than S1, but in this case, the hoistway HW needs to be made higher, which limits the buildings to which the elevator apparatus 100' can be applied.

[0006] An object of the present invention is to provide an elevator device in which the upper pulley can be disposed at approximately the same height as the sheave, without the need to secure a large vertical space above the upper pulley. [Means for solving the problem]

[0007] In order to solve the above problems, the elevator device of the present invention comprises: A car that moves up and down within the elevator shaft, When the elevator shaft is viewed from above, a machine beam is arranged between a rear portion of the elevator car and a rear side wall surface of the elevator shaft; a hoisting machine installed on the machine beam and having a sheave; a counterweight that moves up and down below the machine beam; a lower pulley rotatably suspended from the machine beam via a lower pulley support; an upper pulley rotatably installed above the lower pulley; an upper pulley support beam that supports the upper pulley; a main rope that is hung on a car pulley provided on the car, the upper pulley, the lower pulley, the sheave of the hoist, and a counterweight pulley provided on the counterweight; The sheave and the upper pulley of the hoist are arranged so that their center heights are approximately the same, and the upper pulley support beam supports the upper pulley at a position lower than the upper end of the upper pulley. [Effects of the Invention]

[0008] According to the present invention, an elevator device can be provided in which the upper pulley can be positioned at approximately the same height as the sheave, without the need to secure a large vertical space above the upper pulley.

[0009] Problems, configurations, and effects other than those described above will become apparent from the following description of the embodiments. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a cross-sectional view parallel to the vertical direction showing the configuration of an elevator apparatus according to an embodiment of the present invention. [Figure 2] 1 is a cross-sectional view parallel to the horizontal direction showing the configuration of an elevator apparatus according to an embodiment of the present invention. [Figure 3] FIG. 3 is a cross-sectional view taken along the line III-III in FIG. [Figure 4] 1 is a plan view showing an upper pulley and its support beam (upper pulley support beam) according to an embodiment of the present invention. FIG. [Figure 5] FIG. 2 is a cross-sectional view parallel to the vertical direction showing the configuration of an elevator apparatus according to a comparative example of the present invention. [Figure 6] FIG. 2 is a cross-sectional view parallel to the horizontal direction showing the configuration of an elevator apparatus according to a comparative example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0012] The configuration of the elevator device 100 will be described with reference to FIGS. Fig. 1 is a vertical cross-sectional view showing the configuration of an elevator system 100 according to an embodiment of the present invention. Fig. 2 is a horizontal cross-sectional view showing the configuration of an elevator system 100 according to an embodiment of the present invention. 1, the lower part of the hoistway HW is omitted and only the upper part is shown. Also, FIG. 2 shows the hoistway HW as seen from above the car 104.

[0013] The X-axis, Y-axis, and Z-axis directions are defined as shown in Figures 1 and 2. The X-axis direction is horizontal and coincides with the width direction of the car 104 (see Figure 2). The Y-axis direction is horizontal and coincides with the depth direction of the car 104. The Z-axis direction is vertical (up and down direction) and coincides with the ascending and descending direction of the car 104 and counterweight 105.

[0014] 1, elevator apparatus 100 includes a car 104 and a counterweight 105 that move up and down in a hoistway HW, a rope 107 connected to car 104 and counterweight 105, a hoist 102 around which rope 107 is wound, a guide rail 109 that is erected in the hoistway HW and guides the car 104 and counterweight 105 as they move up and down, and an upper pulley 201 and a lower pulley 251 that change the running direction of rope 107. The elevator apparatus 100 also includes a control panel (not shown) that controls the operation of the elevator apparatus 100.

[0015] The counterweight 105 includes two counterweight pulleys 105a1 and 105a2 around which a rope 107 is hung. The counterweight pulleys 105a1 and 105a2 are provided on the upper part of the counterweight 105. As shown in FIG. 2, the counterweight 105 is guided in its vertical movement by two guide rails 109B. The counterweight 105 moves up and down below the machine beam 103.

[0016] Note that one guide rail 109B is disposed below the hoisting machine 102, and therefore would normally be hidden behind the hoisting machine 102 and would not be able to be shown in Figure 2. However, in order to clearly explain the arrangement of the guide rail 109B, the guide rail 109B is shown in Figure 2 with the hoisting machine 102 visible.

[0017] 2, the car 104 includes car pulleys 104b1 and 104b2 around which the rope 107 is hung. The car pulleys 104b1 and 104b2 are provided at the bottom of the car 104. The car 104 is guided in its vertical movement by two guide rails 109A.

[0018] The elevator car 104 has a car door 104a on the side facing the elevator hall 112. On the elevator hall 112 side, an entrance door 112a is provided at a position opposite the car door 104a.

[0019] In the space between the elevator car 104 and the elevator shaft wall HW1, except for the side on which the car door 104a is provided, the hoisting machine 102 and equipment such as a governor and control panel (not shown) are arranged.

[0020] In this embodiment, the hoisting machine 102 is arranged in the space between the back surface of the car 104 and the elevator shaft wall HW1 (back side wall surface) facing the back surface. To enable such an arrangement, the hoisting machine 102 is configured as a thin hoisting machine in which the dimension in the direction of the rotation axis (y-axis) of the sheave 102a is smaller than the dimension in the horizontal direction and in the direction perpendicular to the rotation axis direction (x-axis). A counterweight 105 is also arranged in the space in which the hoisting machine 102 is arranged.

[0021] The machine beam 103 is fixed to two counterweight guide rails 109B, and the hoisting machine 102 is fixed to the hoistway wall HW1 via the machine beam 103 and the counterweight guide rails 109B.

[0022] The upper pulley 201 is a pulley that is rotatably installed above the lower pulley 251, and in this embodiment is composed of two pulleys 201a and 201b. The two upper pulleys 201a and 201b are arranged in the space on the left side of the car 104 when viewed from the elevator hall 112 side. However, the upper pulleys 201a and 201b can also be arranged in the space on the right side of the car 104.

[0023] The upper pulleys 201a and 201b are supported by an upper pulley support beam 202 and fixed within the hoistway HW. The upper pulley support beam 202 is fixed to the hoistway wall HW1 via a fixing member 203 fixed to the hoistway wall HW1. In this case, at least the upper pulley 201a arranged on the hoisting machine 102 side is arranged so that the height position of its center roughly coincides with the height position of the center of the sheave 102a. Here, "roughly" means that when the sheave 102a and the upper pulley 201a are projected onto an imaginary plane parallel to the vertical direction (for example, the plane shown in FIG. 1), the rotation axis 201x of the upper pulley 201a is allowed to deviate within a range A1 of projection in the height direction of the sheave 102. Preferably, the upper pulley 201a is arranged so that its rotation axis 201x is within a range A2 of projection in the height direction of the rotation axis 102x of the sheave 102.

[0024] The upper pulleys 201a and 201b do not need to be disposed at the same height, but by disposing them at the same height, it is possible to standardize parts, such as by sharing the shaft bracket 204 that supports the upper pulleys 201a and 201b, thereby reducing manufacturing costs. Therefore, in this embodiment, the upper pulleys 201a and 201b are disposed at the same height.

[0025] The counterweight pulley 105a2 is normally hidden behind the machine beam 103 and cannot be shown in the figure. However, in order to clearly explain the arrangement of the counterweight pulley 105a2, the counterweight pulley 105a2 is shown in Figure 2 with the machine beam 103 visible.

[0026] As shown in Fig. 1, one end of the rope 107 pulled out from the sheave 102a toward the car 104 extends downward and is hung on a lower pulley 251 arranged below the hoisting machine 102. The lower pulley 251 is rotatably suspended from the machine beam 103 by a lower pulley support 252 extending downward from the machine beam 103, and is fixed within the hoistway HW. At this time, the lower pulley 251 is arranged at a position where the distance L1 between its center and the center of the sheave 102a is equal to or greater than a certain length.

[0027] The rope 107, whose extending direction is changed upward by the lower pulley 251, is hung on an upper pulley (first upper pulley) 201a. At the upper pulley 201a, the rope 107 is changed so that its extending direction is horizontal and away from the hoist 102 (toward the entrance door 112a).

[0028] When sufficient spacing is required between the sheave 102a and the lower pulley 251 and between the upper pulley 201a and the lower pulley 251, it is preferable to make the distance L1 between the center of the sheave 102a and the center of the lower pulley 251 the same as the distance L2 between the center of the upper pulley 201a and the center of the lower pulley 251. This allows the sheave 102a, the upper pulley 201a, and the lower pulley 251 to be arranged compactly. Therefore, in this embodiment, the distance L1 between the center of the sheave 102a and the center of the lower pulley 251 and the distance L2 between the center of the upper pulley 201a and the center of the lower pulley 251 are set to be the same length.

[0029] 2, the lower pulley 251 is disposed at an angle with respect to the hoistway wall HW1 on which the counterweight guide rail 109B is disposed so that the rope 107 extending vertically downward from the sheave 102a is wound around the lower pulley 251, and the rope 107 extending vertically upward from the lower pulley 251 is wound around the upper pulley 201a. In this case, the hoisting machine 2 is disposed at a position offset from the center in the X-axis direction of the hoistway wall HW1 on which the hoisting machine 2 is disposed to the side of the hoistway wall HW1 on which the upper pulley 201a is disposed. Furthermore, the upper pulley 201a is disposed at a position offset from the center in the y-axis direction of the hoistway wall HW1 on which the upper pulley 201a is disposed to the side of the hoistway wall HW1 on which the hoisting machine 2 is disposed. This allows the hoisting machine 2 and the upper pulley 201a to be disposed compactly, and enables the lower pulley 251 to be made smaller.

[0030] The rope 107 extending from the upper pulley 201a is guided by an upper pulley (second upper pulley) 201b along the hoistway wall HW1 on which the upper pulleys 201a and 201b are arranged. The rope 107 extending vertically downward from the upper pulley 201b is hung on a car pulley 104b1 of the car 104.

[0031] The rope 107 hung on the car pulley 104b1 is changed in direction so that its extending direction is horizontal and heads toward the opposite hoistway wall HW1 from the hoistway wall HW1 on which the upper pulleys 201a and 201b are arranged.

[0032] The rope 107 extending from the car pulley 104b1 extends along the bottom surface of the car 104 and is hooked onto the opposite car pulley 104b2. The rope 107 hooked onto the car pulley 104b2 is changed so that its extension direction faces vertically upward, and one end of the rope is fastened to a rope fixing part on the car side (not shown) near the ceiling HW2 of the elevator shaft HW.

[0033] Meanwhile, the other end of rope 107 extending from sheave 102a toward counterweight 105 extends vertically downward and is hooked around counterweight pulleys 105a1 and 105a2. The extending direction of rope 107 hooked around counterweight pulley 105a1 is changed at counterweight pulley 105a1 to a horizontal direction along the hoistway wall HW1 on which hoisting machine 102 is disposed. The rope 107 extending from counterweight pulley 105a1 is hooked around counterweight pulley 105a2, where its extending direction is changed to a vertically upward direction. The other end of rope 107 extending vertically upward from counterweight pulley 105a2 is fastened to rope fixing portion 107a on the counterweight side.

[0034] The configuration of the elevator apparatus 100 will be described with reference to Figures 3 and 4. Figure 3 is a cross-sectional view taken along line III-III in Figure 1. Figure 4 is a plan view showing an upper pulley 201 and its support beam (upper pulley support beam) 202 according to one embodiment of the present invention. As shown in Fig. 3, the upper pulleys 201a and 201b in this embodiment are supported by a shaft bracket 204 and an upper pulley support beam 202 and fixed within the hoistway HW. The upper pulley support beam 202 (see Figs. 1, 2, and 3) is fixed to the hoistway wall HW1 via a fixing member 203 fixed to the hoistway wall HW1.

[0035] As shown in Fig. 4, the rotating shaft 201x of the upper pulleys 201a and 201b is rotatably supported by a shaft bracket 204. The shaft bracket 204 is fastened to the first upper pulley support beam 202a using a bolt 206. The fastening structure of the shaft bracket 204 using the bolt 206 is not limited to that shown in Fig. 4, and other fastening structures may also be used.

[0036] The first upper pulley support beam 202a is fixed via a second upper pulley support beam 202b to a fixed member 203 fixed to the elevator shaft wall HW1.

[0037] The upper pulley support beam 202 (202a, 202b) is fixed between the upper pulleys 201a, 201b or between the upper pulley support beam 202 and the elevator shaft wall HW1 via an elastic body 207.

[0038] In this embodiment, the upper pulley support beams 202 (202a, 202b) are fixed to the shaft brackets 204 of the upper pulleys 201a, 201b, and the fixing points of the upper pulley support beams 202 (202a, 202b) to the upper pulleys 201a, 201b are the shaft brackets 204. In this case, the elastic body 207 is provided between the upper pulley support beams 202 (202a, 202b) and the shaft brackets 204. Alternatively, the elastic body 207 may be provided between the first upper pulley support beam 201a and the second upper pulley support beam 201b.

[0039] The upper pulley support beams 202 (202a, 202b) are fixed to a fixed member 203 that is fixed to the hoistway wall HW1, and the fixed point of the upper pulley support beams 202 (202a, 202b) with the hoistway wall HW1 is the fixed member 203. In this case, the elastic body 207 is provided between the upper pulley support beams 202 (202a, 202b) and the fixed member 203.

[0040] With the above-described configuration, the shaft bracket 204, the first upper pulley support beam 202a, and the second upper pulley support beam 202b are positioned below the upper pulleys 201a and 201b. In this case, the upper pulley support beams 202a and 202b and the elastic body 207 are positioned lower than the lower ends 201B of the upper pulleys 201a and 201b.

[0041] In order to ensure a vertical space S1 (see Figure 3) above the upper pulleys 201a, 201b and the upper pulley support beams 202a, 202b, the upper pulley support beams 202a, 202b should support the upper pulleys 201a, 201b at a position lower than the upper ends 201A of the upper pulleys 201a, 201b.

[0042] The support structure of the upper pulleys 201a, 201b in this embodiment allows a large vertical space S1 to be secured, and the upper pulley 201 and the upper pulley support beam 202 can be hung with a winch to carry out installation work for the upper pulley 201 and the upper pulley support beam 202.

[0043] The elevator device 100 of the above-described embodiment has the following features. (1) A car 104 that moves up and down within the elevator shaft HW; When the elevator shaft HW is viewed from above, a machine beam 103 is disposed between the rear portion of the elevator car 104 and a rear wall surface HW1 of the elevator shaft HW; a hoisting machine 102 installed on a machine beam 103 and having a sheave 102a; A counterweight 105 that moves up and down below the machine beam 103; a lower pulley 251 rotatably suspended from the machine beam 103 via a lower pulley support 252; an upper pulley 201 (201a, 201b) rotatably installed above the lower pulley 251; an upper pulley support beam 202 (202a, 202b) supporting the upper pulley 201 (201a, 201b); a main rope 107 that is hung on car pulleys 104b1 and 104b2, an upper pulley 201 (201a and 201b), a lower pulley 251, a sheave 102a of the hoist 102, and counterweight pulleys 105a1 and 105a2 that are provided on the counterweight 105; Equipped with The sheave 102a of the hoisting machine 102 and the upper pulley 201 (201a, 201b) are arranged so that their center heights are approximately the same, and the upper pulley support beam 202 (202a, 202b) supports the upper pulley 201 (201a, 201b) at a position lower than the upper end 201A of the upper pulley 201 (201a, 201b).

[0044] (2) The upper pulley support beams 202 (202a, 202b) are fixed to the upper pulleys 201 (201a, 201b) or to the elevator shaft wall HW1 via elastic bodies 207.

[0045] (3) The upper pulley support beam 202 (202a, 202b) and the elastic body 207 are disposed at a position lower than the lower end 201B of the upper pulley 201 (201a, 201b).

[0046] (4) The upper pulley 201 (201a, 201b) is disposed above the upper pulley support beam 202 (202a, 202b) by the shaft bracket 204, The upper pulley support beams 202 (202a, 202b) are disposed at a position lower than the lower ends 201B of the upper pulleys 201 (201a, 201b).

[0047] (5) When the sheave 102a and the upper pulley 201 (201a, 201b) are projected onto a virtual plane parallel to the vertical direction, the rotation axis 201x of the upper pulley 201 (201a, 201b) is within the projection range A1 in the height direction of the sheave 102a.

[0048] (6) When the sheave 102a and the upper pulley 201 (201a, 201b) are projected onto a virtual plane parallel to the vertical direction, the rotation axis 201x of the upper pulley 201 (201a, 201b) is within the height-wise projection range A2 of the rotation axis 102x of the sheave 102a.

[0049] The present invention is not limited to the above-described embodiments, but includes various modifications. For example, the above-described embodiments are intended to provide a detailed explanation of the present invention in an easy-to-understand manner, and the present invention is not necessarily limited to those including all of the described configurations. Furthermore, it is possible to add, delete, or replace part of the configuration of the embodiments with other configurations. [Explanation of symbols]

[0050] 102...hoisting machine, 102a...sheave, 102x...rotating shaft of sheave 102a, 103...machine beam, 104...car, 104b1, 104b2...car pulley, 105...balance weight, 105a1, 105a2...balance weight pulley, 107...main rope, 201 (201a, 201b)...upper pulley, 201A...upper end of upper pulley 201 (201a, 201b), 201B...lower end of upper pulley 201 (201a, 201b), 201x...rotating shaft of upper pulley 201 (201a, 201b), 202 (202a, 202b)...upper pulley support beam, 203...fixed point between the upper pulley support beam 202 (202a, 202b) and the elevator shaft wall HW1 (fixed member fixed to the elevator shaft wall HW1), 204...fixed point between the upper pulley support beam 202 (202a, 202b) and the upper pulley 201 (201a, 201b) (axis bracket), 207...elastic body, 251...lower pulley, 252...lower pulley support base, A1...height direction projection range of the sheave 102a, A2...height direction projection range of the rotation axis of the sheave 102a, HW...elevation shaft.

Claims

1. A car that moves up and down within the elevator shaft, When the elevator shaft is viewed from above, a machine beam is arranged between a rear portion of the elevator car and a rear side wall surface of the elevator shaft; a hoisting machine installed on the machine beam and having a sheave; a counterweight that moves up and down below the machine beam; a lower pulley rotatably suspended from the machine beam via a lower pulley support; an upper pulley rotatably installed above the lower pulley; an upper pulley support beam that supports the upper pulley; a main rope that is hung on a car pulley provided on the car, the upper pulley, the lower pulley, the sheave of the hoist, and a counterweight pulley provided on the counterweight; Equipped with An elevator device in which the sheave and the upper pulley of the hoisting machine are arranged so that their center heights are approximately the same, and the upper pulley support beam supports the upper pulley at a position lower than the upper end of the upper pulley.

2. The elevator system of claim 1, The upper pulley support beam is fixed to the upper pulley or to a hoistway wall via an elastic body.

3. The elevator system of claim 2, An elevator device in which the upper pulley support beam and the elastic body are positioned lower than the lower end of the upper pulley.

4. The elevator system of claim 1, The upper pulley is disposed above the upper pulley support beam by an axle bracket; An elevator device in which the upper pulley support beam is positioned lower than the lower end of the upper pulley.

5. The elevator system of claim 1, The upper pulley is an elevator device in which, when the sheave and the upper pulley are projected onto an imaginary plane parallel to the vertical direction, the rotation axis of the upper pulley is within the projection range of the sheave in the height direction.

6. The elevator system of claim 1, The upper pulley is an elevator device in which, when the sheave and the upper pulley are projected onto an imaginary plane parallel to the vertical direction, the rotation axis of the upper pulley is within the projection range in the height direction of the rotation axis of the sheave.

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