JP2015205768A - Bottom receiving device of elevator rail and elevator device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottom receiving device of an elevator rail and an elevator device having the same which can automatically absorb a compression load to the elevator rail due to the subsidence of an architectural structure.SOLUTION: A bottom receiving device of an elevator rail is provided at a lower end of an elevator rail 4 which is erected in a hoistway 1 and guides the moving up and down of lifting bodies 2, 3 that move up and down in the hoistway 1. The bottom receiving device of the elevator rail comprises: an anchor block 9 installed on a pit bottom surface 8 of the hoistway 1; a load receiving plate 6 installed at the lower end of an elevator rail 12 of the lowermost end; a guide rod 7 inserted into a hole provided in the load receiving plate 6, and erected on the anchor block 9; and a spring 5 which is inserted into the guide rod 7 below the load receiving plate 6 and absorbs a compression load of the elevator rail 4 due to the subsidence of an architectural structure.

Description

  The present invention relates to an elevator rail bottom receiving device and an elevator apparatus including the same.

  Due to secular change, the height of the building shrinks due to its own weight and sinks. Generally, an elevator rail is fixed to each floor with a span of 2.5 to 4 m in a building, but since a high-rise building has a larger amount of settlement than usual, a compressive load applied to the rail becomes large.

  As an elevator rail bottom receiving device, there are a plurality of elevator rails standing on the elevator hoistway to guide the elevator body, an elevator rail bolt fixing base installed on the bottom of the pit of the hoistway, The structure is provided with a jack bolt that is provided on a bolt fixing base directly under the elevator rail and that can absorb the compressive load of the elevator rail due to the settlement of the building by adjusting the screwing amount. (For example, see Patent Document 1)

JP 2006-160413 A

  However, because a very large load is applied to the bolts due to the shrinkage of the building, it is very difficult to manually adjust the screwing amount under a compressive load, and the compressive load applied to the rail due to the amount of settlement When the screwing is not adjusted immediately manually, the rail axis direction is bent, and it is necessary to frequently inspect the entire elevator rail.

  The present invention has been made from the above-described prior art, and an object of the present invention is to provide an elevator rail bottom receiving device that can automatically absorb the compressive load of the elevator rail due to the sinking of a building, and an elevator device including the same. There is to do.

  In order to achieve the above object, the present invention includes a lifting body that moves up and down in a hoistway, a plurality of elevator rails that are erected in the hoistway and guide the lifting of the lifting body, and the elevator An elevator rail bottom receiving device that receives a compressive load applied to the elevator rail is provided at the lower end of the rail. The elevator rail bottom receiving device includes a fixed base installed on the bottom surface of the pit of the hoistway and the lowermost elevator. A load receiving plate installed at the lower end of the rail, a guide bar inserted into a hole provided in the load receiving plate and erected on the fixed base, and inserted into the guide bar below the load receiving plate. And a spring that absorbs the compressive load of the elevator rail due to the settlement of the building.

  ADVANTAGE OF THE INVENTION According to this invention, the compressive load of the elevator rail by the settlement of a building can be absorbed automatically.

1 is a schematic side view showing an overall outline of an elevator apparatus according to Embodiment 1 of the present invention. It is a principal part expanded side view of the bottom receiving apparatus of the elevator rail in Embodiment 1 of this invention. It is a top view of the bottom part receiving apparatus of an elevator rail seen from the arrow A direction (downward) of FIG. It is a front view of the bottom part receiving apparatus of the elevator rail seen from the arrow B direction of FIG. It is a top view of the bottom part receiving apparatus of the elevator rail in Embodiment 2 of this invention seen from the arrow A direction (downward) of FIG. It is a front view of the bottom part receiving apparatus of the elevator rail in Embodiment 2 of this invention seen from the arrow B direction of FIG.

Embodiments of the present invention will be described below with reference to the drawings.
<Embodiment 1>
FIG. 1 is a schematic side view showing an overall outline of an elevator apparatus according to Embodiment 1 of the present invention. FIG. 2 is an enlarged side view of an essential part of the bottom receiving device for an elevator rail according to Embodiment 1 of the present invention. FIG. 3 is a plan view of the bottom receiving device of the elevator rail as seen from the direction of arrow A (downward) in FIG. FIG. 4 is a front view of the bottom receiving device of the elevator rail as seen from the direction of arrow B in FIG.

  In the elevator apparatus according to the present embodiment, as shown in FIG. 1, an elevator rail 4 that guides elevators such as a car 2 and a counterweight 3 is erected on an elevator hoistway 1. A spring 5 that automatically adjusts the amount of subsidence of the rail is installed on the lowermost rail 12 of the elevator rail 4.

  As shown in FIG. 2, an elevator rail bottom receiving device provided in the elevator apparatus has at least a load receiving plate 6 that contacts the lower surface of the lowermost rail 12 and a load receiving plate 6 facing the lower surface of the lowermost rail 12. And a guide bar 7 that guides the movement of the spring 5 and the load receiving plate 6, and a fixed base 9 that supports the guide bar 7 upright.

Therefore, in this embodiment, the load receiving plate 6 is installed between the elevator rail 4 and the spring 5, and the guide rod 7 inserted into the spring 5 from the load receiving plate 6 is installed up to the hoistway pit bottom surface 8.
The hole through which the guide rod 7 provided in the load receiving plate 6 is inserted is not screwed with the guide rod 7, and the load receiving plate 6 is adjusted downward or the length of the rail is adjusted as the lower end of the rail sinks. When the compressive load is removed by, for example, the elastic force of the spring 5 disposed below is received, each can be freely moved upward. That is, the hole through which the guide bar 7 provided in the load receiving plate 6 is inserted is set to be slightly larger than the diameter of the guide bar 7. However, the upper end of the guide bar 7 is provided with a head provided on a bolt or the like, and this head is larger than the hole provided in the load receiving plate 6.

  As shown in FIG. 3, a spring 5 is inserted into the guide rod 7 below the load receiving plate 6, and the spring 5 is held by the guide rod 7. The spring 5 urges the load receiving plate 6 upward by its elastic force. That is, the hole through which the guide bar 7 provided in the load receiving plate 6 is inserted is set to be smaller than the diameter of the spring 5.

  As shown in FIG. 2, when the spring 5 receives a compressive load and / or when the compressive load is removed by adjusting the length of the rail as shown in FIG. It is attached to stand the guide rod 7 so as not to move in any direction other than the vertical direction along the guide rod 7 when moving upward, and is a nut-like threadedly engaged with a screw groove provided on the guide rod 7. Is formed of things. Note that the thread groove provided on the surface of the guide rod 7 may be provided only in a portion screwed with the fixing base 9 or may be provided uniformly throughout. However, in consideration of a problem caused by the spring 5 or the load receiving plate 6 being caught in a thread groove or the like, if it is provided only in the portion screwed with the fixing base 9, it is possible to make the problem less likely to occur.

  In the present embodiment, the fixed base 9 is placed on the pit bottom surface 8, and the back surface thereof is fixed to the rail mounting plate 14. Further, the rail mounting plate 14 has a size that overlaps with a predetermined length parallel to the back surface of the lowermost rail 12, and the lowermost rail 12 is sandwiched between the sliding clips 13. As a result, the fixing base 9 is fixed on the lowermost end rail 12 and thus on the pit bottom surface 8 below the elevator rail 4.

  Thus, the guide bar 7 only serves to hold and support the positions of the spring 5 and the load receiving plate 6, and the load receiving plate 6 is in an inserted state in which the guide rod 7 is not screwed with the guide rod 7, and compressive load is applied. I do not receive it. Accordingly, the level of processing accuracy, material strength, material, and the like required for the guide bar is not as high as the level for jack bolts, which is a conventional adjustment technique. Therefore, the cost can be reduced by using the guide bar 7.

  For example, as shown in FIG. 4, in a state where the elevator rail 12 is sunk, the sunk amount 10 can be automatically adjusted up to the compressible amount of the two springs 5. Therefore, even if a compressive load is applied, it is held by the spring force, so that there is no need to manually turn a bolt with a large load that hinders rotation of the bolt or the like.

  As described above, according to the present embodiment, rail bending caused by a strong compressive load on the rail can be prevented, and adjustment is not required until the spring is compressed, so frequent inspection of the entire elevator rail is required. Can be eliminated. Therefore, compared with the adjustment by the bolt, it contributes to reducing the frequency of adjusting the rail.

  And when it reaches a level where a certain amount of compressive load is applied, it is possible to adjust the length such as by cutting the rail and easily return to a state where it can be automatically adjusted even if a compressive load is applied again. .

  In the present embodiment, an example in which two springs 5 are provided has been described. However, the present invention is not limited to this example, and a plurality of three or more springs 5 may be provided.

  In addition, by installing the above-mentioned elevator rail bottom receiving device in the elevator device, it is advantageous for elevator maintenance, and it is difficult to cause rail bending due to compressive load, and the elevator device has improved safety. Is possible.

<Embodiment 2>
FIG. 5 is a plan view of the bottom receiving device for an elevator rail according to the second embodiment of the present invention as seen from the direction of arrow A (downward) in FIG. 6 is a front view of the bottom receiving device for an elevator rail according to the second embodiment of the present invention as seen from the direction of arrow B in FIG. In the present embodiment, the embodiment is different from that in FIG. 2, but since it is the same as in the drawing, FIG. 2 is also used in this embodiment. The overall outline of the elevator apparatus is the same as that shown in FIG.

  In the first embodiment, when the guide rail sinks together with the building, the two springs 5 automatically absorb the compression load of the elevator rail, but the spring constants of the two springs need to be aligned. Therefore, it takes time for adjustment, and there is a possibility that a difference occurs between the left and right spring forces. For this reason, in the second embodiment, as shown in FIGS. 5 and 6, the two springs 5 are replaced with one 8-shaped spring 11, thereby automatically stabilizing the compression load of the elevator rail. The position of the spring can be fixed by the guide rod 7.

  The embodiment of the present invention also exerts a great effect particularly on a high-rise building with a high building height with a large amount of subsidence, but it is also effective on a normal building. In addition, according to the embodiment of the present invention, since there is no work for manually adjusting the screwing amount, the frequency of the inspection in the rail axis direction and the inspection of the entire rail can be reduced, which is described in the first embodiment. The same effect can be obtained.

  Further, in this embodiment, by using one 8-shaped spring 11, it is possible to absorb a compressive load with one spring while suppressing rattling of the spring. However, if some backlash can be allowed, the two guide rods 7 can be configured by one elliptical or circular spring.

DESCRIPTION OF SYMBOLS 1 Elevator hoistway 2 Car 3 Counterweight 4 Elevator rail 5 Spring 6 Load receiving plate 7 Guide bar 8 Pit bottom surface 9 Fixing base 10 Settling amount 11 Eight-shaped spring 12 Bottom end elevator rail 13 Sliding clip 14 Rail mounting plate

Claims (3)

A lifting body that moves up and down in the hoistway, a plurality of elevator rails standing in the hoistway to guide the lifting and lowering of the lifting body, and a compressive load applied to the elevator rail at the lower end of the elevator rail In the elevator apparatus provided with the bottom receiving device of the receiving elevator rail,
The elevator rail bottom receiving device includes a fixed base installed on the bottom surface of the pit of the hoistway, a load receiving plate installed at the lower end of the lowermost elevator rail, and a hole provided in the load receiving plate. A guide rod inserted and erected on the fixed base; and a spring that is inserted below the load receiving plate and is inserted into the guide rod to absorb the compression load of the elevator rail due to the settlement of the building. Elevator device characterized.   2. The elevator apparatus according to claim 1, wherein two guide rods are erected at a predetermined interval, and the spring has an 8-shaped shape when viewed from above, and is inserted through the two guide rods. An elevator device characterized by that. In the elevator rail bottom receiving device provided at the lower end of the elevator rail for guiding the lifting and lowering of the lifting body standing and rising in the hoistway in the hoistway,
A fixed base installed at the bottom of the pit of the hoistway, a load receiving plate installed at the lower end of the lowermost elevator rail of the elevator rail, and the fixed base inserted through a hole provided in the load receiving plate An elevator rail comprising: a guide rod erected on the base plate; and a spring that is inserted through the guide rod below the load receiving plate and absorbs the compressive load of the elevator rail due to the settlement of the building. Bottom receiving device.