JPH0449190A - Cage frame structure for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) This invention relates to an elevator car frame structure.

(Prior Art) Generally, as a car frame structure that supports an elevator car, for example, as shown in FIG. The first guide rail 105 is provided on the left and right vertical frames 107 (the opposite side is not shown), the upper and lower upper frames 109 and lower frames 111, and the upper frame 109 side and the lower frame 111 side. It consists of a pair of upper and lower guide rollers 11.3115 that roll along the second rail surface 101.103, and a car compartment 119 is placed on a floor support frame 117 fixed to the lower frame 111.

(Problem to be Solved by the Invention) As described above, the car frame is connected to the first part of the guide rail 105. Second
It ascends or descends within the hoistway 121 while being guided vertically by a pair of upper and lower guide rollers 113 and 115 that roll along rail surfaces 101 and 103. In this case, for example, in the case of an indirect hydraulic elevator, the lobe 125 for lifting and lowering is connected to the extension of the hitch frame 123 extending from the lower frame 111 as shown in the figure, so that the traction as shown in FIG. The point is a position where the lobes 125 are connected, and is in a state where it greatly protrudes from the center of gravity G of the car compartment 119.

For this reason, when an upward pulling force is applied by the rope 125, a bending moment is generated that tends to overturn the cage 119.

The unbalanced load P due to this bending moment is S...
As is clear from the equation of the distance W1 between the upper and lower guide rollers...car weight W2...carrying load, all of them act on the guide rail 105 via the pair of upper and lower guide rollers 113, 115.

This load is much larger compared to other roving methods.

Furthermore, since the deceleration reaches 5G when the safety device is in operation, the guide rail 107 is required to have a section modulus that can withstand this load. Increasing the section modulus of the guide rail 107 not only leads to an increase in the cost of the guide rail itself, but also increases the cost of accompanying auxiliary parts, such as fish plates, rail clips, brackets installed on the guide rail, or safety. The equipment also becomes larger, leading to increased costs. Especially 1. Increasing the size of the safety device has the disadvantage that the weight of the car increases, and the load acting on the guide rail 107 increases, resulting in a vicious cycle being repeated.

SUMMARY OF THE INVENTION The present invention has been made to eliminate the above-mentioned drawbacks, and aims to reduce the stress generated in the guide rail during operation of the safety device.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides the following features:
Left and right vertical frames arranged along a guide rail having a rail surface and a second rail surface, upper and lower upper frames and lower frames, and a first guide rail provided on the upper frame side and the lower frame side. ．．
The guide rail includes a pair of upper and lower guide rollers that roll along a second rail surface, and a stopper member that faces the first rail surface and the second rail surface of the guide rail is provided on the vertical frame.

(Function) According to this elevator car frame structure, when the safety is operated, the stopper member is placed in the first position of the guide rail. Since the guide rails are in contact with the second rail surfaces, no concentrated load is applied to the guide rails and deformation can be suppressed. As a result, a guide rail with a small section modulus can be used, so that the supplementary parts and safety devices attached to the guide rail can be downsized, and the weight of the entire car frame can be reduced.

(Embodiment) Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 4.

1 in the figure shows a hydraulic elevator with a back plunger quib that moves up and down in the hoistway 2, and the hydraulic elevator 1
The car room 3 is constituted by a car side plate 5, a car floor 7, and a car ceiling 9, and is placed on a floor support frame 15 of a car frame 13 via a vibration-proof rubber 11.

The car frame 13 is the first. Left and right vertical frames 21 (one side is not shown) each having a U-shaped cross section are arranged along one guide rail having a second rail surface 15.17, and upper and lower upper rails each having a U-shaped cross section. 23 and a lower frame 25, and the floor receiving frame 15 is fixedly supported on the lower frame 25.

The first guide rail 19 is located on the upper frame 23 side and the lower frame 25 side. Guide rollers 27.29 are provided which roll along the second rail surfaces 1.5, 1.7.

Further, the first guide rail 19 is provided on the inner wall surfaces 21a, 21a of the left and right bent portions of the vertical frame 21. 2nd rail surface 15.17
Stopper members 31 and 33 facing each other are fixed on the top and bottom.

The stomper member 31.33 is the first. 2nd rail surface 15.
A slight gap is ensured with respect to the car frame 17, so that vertical movement of the car frame 13 is not hindered.

On the other hand, the guide rail 19 is attached to the lower frame 25 in an emergency.
A roll-type safety device W35 and a hitch frame 37 are each provided, and the hitch frame 37 has a lobe at its tip that is traction-controlled by a hydraulic device (not shown) that can extend and retract up and down. 39 are connected.

According to the car frame structure configured in this way, the lobes 39
The car frame 13 moves up and down within the hoistway 2 by the traction control. When the car frame 13 moves up and down, the guide roller 27.2
9 is the first and second rail surface 15.17 of the guide rail 19
Transfer according to.

At this time, the stopper members 31 and 33 are connected to the guide rail 19.
No. 1. Since it is separated from the second rail surface 15.17, the vertical movement of the car frame 13 is not affected equally.

Next, when the safety device 35 is activated in an emergency,
A large load is input to the guide rail 19 via the guide rollers 27 and 29, and a bending moment acts on the guide rail 19 and the vertical frame 21.

At this time, the stopper members 31 and 33 are in the first position. Since the receiver carries the load by strongly contacting the second rail surfaces 15 and 17, concentrated loads are avoided as shown in Fig. 3, and the bending moment b of the guide rail 19 is reduced by D compared to the conventional case a. You will be able to get it. Therefore, it is possible to use the guide rail 19 with a small section modulus.

It should be noted that when the stopper members 31 and 33 are in safety operation, the coefficient of friction due to contact increases, so the car deceleration changes and the safety device 35 is adversely affected. It is desirable to have trouble with this.

Moreover, although the stopper members 31 and 33 are arranged one each on the upper and lower sides in this embodiment, it is also possible to provide a plurality of them.

〔Effect of the invention〕

As described above, according to the present invention, the maximum bending moment generated in the guide rail can be suppressed by the stopper member, so that a guide rail with a small section modulus can be used.

Along with this, it becomes possible to downsize the supplementary parts corresponding to the guide rails, downsize the safety device, etc., and it becomes possible to reduce the weight of the entire car frame. Moreover, it is also very favorable in terms of cost due to its miniaturization and weight reduction.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing the car frame structure of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, Fig. 3 is a bending moment diagram, and Fig. 4 is a schematic perspective view of the safety device. 5 is a schematic side view similar to FIG. 1 showing the conventional example, and FIG. 6 is an explanatory diagram showing the balanced state of the car frame. 15..First rail surface 17..Second rail surface 19..Guide rail 21..Vertical frame 23..Upper frame 25..Lower frame 2729..Guide roller 31.33..Stopper member Fig. 2

Claims (1)

[Claims] Left and right vertical frames arranged along a guide rail having a first rail surface and a second rail surface, upper and lower upper frames and lower frames, and guide rails provided on the upper frame side and the lower frame side. A pair of upper and lower guide rollers that roll along the first and second rail surfaces are provided, and the vertical frame is provided with a stopper member that faces the first and second rail surfaces of the guide rail. Characteristic elevator car frame structure.