JPH1029776A - Guide rail for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the bending rigidity of a bent section, reducing the distortion of the bent section against a load from a guiding device so as to improve comfortable riding by providing a reinforcement in the bent section of a rib groove shape steel elevator guide rail composed by bending a steel plate. SOLUTION: A reinforcement 11 is provided in the bent section 10 of a guide rail 4 so as to increase the bending rigidity of the bent section 10 of the same, and distortion caused by a load from a car guiding device is reduced. Accordingly, when the car guiding device passes on the guiding surfaces 4a and 4b of the guide rail 4, no distortion occurs even if the guiding surface 4a receives a large load by supporting the deviation load of a car 1. By providing the reinforcement 11 on the full length of the guide rail 4, distortion by the car guiding device is reduced for the entire guide rail 4. But even by providing one, two or some reinforcements 11 only in a joint portion, a level difference produced in the joint portion is reduced and thus comfortable riding is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an elevator guide rail.

[0002]

2. Description of the Related Art A guide rail of a conventional small elevator will be described with reference to FIGS.

A car 1 of an elevator is suspended by a main rope 2 and travels between floors 5 while being guided by guide rails 4 in a hoistway 3 of the elevator.

The main rope 2 has one end attached to the car 1 and the other end connected to a hoist (not shown) to suspend the car 1. In a small elevator or the like, the main rope 2 is attached to the landing 5 closer to the landing than the center of gravity of the car 1 and suspended (FIG. 4).

The guide rail 4 is made of a steel plate bent in a U-shape in cross section (rib groove steel shape). In a small elevator, the guide rail 4 is installed near the landing 5 in the hoistway 3.

A car guide device 8 comprising guide wheels 6 and 7 is provided at the upper and lower portions of the car 1, respectively. Guide wheels 6,
7 on the guide surfaces 4a and 4b of the guide rail 4, so that the car 1 can move freely in the vertical direction.
It has a function of restraining in the width direction and the depth direction.

The length of each guide rail 4 is about 3 meters, and a plurality of guide rail joint plates 9 are used by connecting the inside of the hoistway vertically.

When the car 1 travels in the vertical direction, the car 1 travels while being restrained in the width direction and the depth direction by the car guide device 8, but the seam portions of the guide surfaces 4a and 4b of the guide rail 4 are smoothly connected. If there is a level difference, the car guide device 8 will vibrate when passing through the joint between the guide surfaces 4a and 4b, and the ride quality will be degraded.

For this reason, there is also a method in which an adjusting portion is provided at a joint portion of the guide rail 4 and the adjusting portion is appropriately bent when the guide rail 4 is installed, thereby eliminating the step of the joint of the guide rail 4 (actual opening). 60-130268).

[0010]

However, even if the guide surfaces 4a and 4b can be smoothly installed without any level difference, the guide rails 4 are not moved when the car guide device 8 passes.
To be elastically deformed under the load from
Therefore, there is a step at the joint portion of the guide rail which does not elastically deform.

In particular, the guide surface 4a receives a load of 100 kgf or more to support an eccentric load caused by the main rope 2 being connected to a position different from the center of gravity of the car 1, and the joint of the guide surface 4a is a car guide device. At the time of 8 passes, a step of about 1 mm is generated, and the ride quality is extremely deteriorated.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce a step at a guide rail joint portion caused by a load applied to a guide rail when passing through a guide device, and to reduce a vibration of a car.

[0013]

According to the present invention, reinforcement (gusset) 11 is provided at a bent portion 10 of an elevator guide rail having a U-shaped cross section (rib-shaped steel shape) formed by bending a steel plate.
To increase the bending rigidity of the bent portion and reduce the bending of the bent portion against the load from the guide device. As a result, it is possible to reduce the step at the joint portion of the guide rail when passing through the car guide device, and to reduce vibration when the car guide device passes through the joint portion of the guide rail, thereby improving ride comfort.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on an embodiment shown in FIG.

A reinforcement 11 is provided at a bent portion 10 of the guide rail 4. Thereby, the bending rigidity of the bent portion 10 of the guide rail is increased, and the bending caused by the load of the car guide device 8 is reduced.

As a result, the guide surfaces 4a,
When the car guide device 8 passes over the car 4b, even if the guide surface 4a receives a large load while supporting the deviation load of the car 1, it does not bend.

If the reinforcement 11 is provided over the entire length of the guide rail 4, the deflection caused by the car guide device 8 can be reduced over the entire guide rail 4. However, only one, two or several reinforcements 11 are provided only at the joints. In addition, it is possible to reduce the level difference generated at the seam portion by inserting the joint, and it is possible to effectively improve the riding comfort.

Further, since the effect of the reinforcement 11 is caused by the passage of the car guide device 8, the reinforcement 11 may be provided only on the guide surface 4a side.

As an embodiment of the reinforcement 11, a triangular steel plate is welded to the bent portion of the guide rail 4 as in the reinforcement 11a (FIG. 2), or a press is used as in the reinforcement 11b (FIG. 3). It is also possible to use a triangular reinforcement with ribs formed on a thin steel plate. Further, at the time of press molding of the guide rail, a rib may be directly formed on the bent portion to form reinforcement.

[0020]

According to the present invention, the bending rigidity of the bent portion of the guide rail is increased, and the elastic deformation of the bent portion of the guide rail when the car passes through the guide device, that is, the step at the joint portion is reduced.

Therefore, the vibration generated by the step is reduced to reduce the vibration transmitted to the car.

[Brief description of the drawings]

1 is a perspective view of a guide rail according to the present invention,

FIG. 2 is a partially detailed perspective view of FIG. 1;

FIG. 3 is a perspective view of a guide rail according to another embodiment of the present invention,

FIG. 4 is a cross-sectional view of a conventional elevator,

FIG. 5 is a perspective view of a conventional guide rail.

[Explanation of symbols]

 Reference Signs List 1 car 2 main rope 3 hoistway 4 guide rail 5 landing 6, 7 guide wheel 8 car guide device 9 seam plate 11, 11a, 11b reinforcement

Claims (5)

[Claims] 1. An elevator guide rail in the form of a rib-groove steel formed by bending a steel plate for guiding a car traveling, wherein reinforcement is provided near a guide surface at an end of the guide rail. . 2. An elevator guide rail according to claim 1, wherein said reinforcement is provided only at a portion in contact with a guide surface of a car guide device. 3. The guide rail of an elevator according to claim 1, wherein the reinforcement is formed by welding a polygonal steel plate to a bent portion of the guide rail. 4. The guide rail of an elevator according to claim 1, wherein said reinforcement is formed of a triangular thin steel plate provided with a force bone by rib projection. 5. The guide rail of an elevator according to claim 1, wherein said reinforcement is formed by taking out a rim simultaneously with molding of the guide rail.