Elevator guide rail

Abstract

The present invention discloses an elevator guide rail, which comprises a vertical arm and a horizontal arm, wherein the horizontal arm comprises a first arm and a second arm; the second arm is clamped on a gasket and an elevator shaft wall by a connecting piece; the connecting piece comprises a bolt, a nut and an annular plate; a center hole is provided at the center of the annular plate, through which the annular plate is sleeved on the screw rod of the bolt; the annular plate comprises a raised portion protruding toward the second arm of the elevator guide rail and a flat portion arranged opposite to the raised portion; the raised portion is in direct contact with the upper surface of the second arm and applies a locking force to the second arm toward the elevator shaft wall; a downwardly extending limiting protrusion is provided on the lower surface of the flat portion; a limiting plate is also provided between the annular plate and the gasket; a limiting groove is provided on the upper surface of the limiting plate, and the limiting protrusion is clamped in the limiting groove.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to an elevator guide rail. Background Art

[0002] Elevator guide rails are two or more vertical or inclined rigid rails installed in the elevator shaft or between floors. They are the safety rails for the elevator to travel up and down in the shaft. They are used to ensure that the elevator car and counterweight move up and down along the guide rails, and provide guidance for the elevator car or counterweight device. The guide rail is an important reference component of the elevator. It controls the running trajectory of the elevator car and ensures the transmission of operating signals. It is also an important component related to elevator safety and operation quality.

[0003] The elevator guide rail is installed on the hoistway wall and is fixed to the hoistway wall by the guide rail frame and the guide rail bracket. The commonly used guide rail for elevators is the "T"-shaped guide rail, which has the characteristics of strong rigidity, high reliability, safety and low cost. The guide rail surface must be smooth without obvious uneven surfaces. Since the guide rail is the shuttle rail for the guide shoe and the safety clamp on the elevator car, the gap must be ensured during installation. At the same time, the guide rail has to bear the task of stopping the elevator when an overspeed accident occurs, so its rigidity cannot be ignored.

[0004] Elevator guide rails are important components to ensure the safety and comfort of elevators.

[0005] The factor that affects the safety of elevator guide rails is mainly the material of the guide rails. If the guide rail material is too hard or uneven (partially too hard), the clamping will not get enough friction during the safety clamp braking, which will cause the brake to fail and the car to fall, the most serious condition in elevator accidents. The guide rails must also be strong enough to ensure the support of the car and the impact force during the safety clamp braking.

[0006] There are several factors that affect the comfort of the elevator:

[0007] a. Guide rail connection accuracy: The connection accuracy of solid guide rails is guaranteed by the end dimensions of the guide rails and the symmetry of the mortise and tenon joints. The connection accuracy of hollow guide rails and escalator guide rails is guaranteed by the end dimensions of the guide rails and the form and position tolerances. The connection accuracy of guide rails directly affects the stability and comfort of elevator operation.

[0008] b. Roughness of the guide rail surface: The roughness of the guide rail surface directly affects whether the guide shoe can run smoothly on the guide surface. It also affects the storage of lubricating oil, thereby affecting the running quality of the car.

[0009] c. Straightness and torsion of the guide rail: Any bending or torsion at any point on the guide rail will give the car a lateral force, affecting the car's up and down linear motion, making the car feel shaky. As the elevator speed increases, the car will vibrate, affecting comfort.

[0010] In the prior art, after the elevator guide rails are connected to the elevator shaft wall, the building height will be slightly reduced due to the sinking of the building masonry under natural conditions, which will cause a slight contraction of the building. This natural deformation of the building will affect the elevator guide rails, causing the clamping parts to deform, which will lead to deterioration of the running or operating conditions of the elevator car and counterweight device. In the most unfavorable case, this deformation will cause damage to the elevator guide rails, making the elevator device unusable. In addition, high-rise buildings will also produce the above effects due to drastic changes in temperature, wind or earthquakes. Therefore, precautions must be taken to allow longitudinal displacement between the elevator guide rails and the elevator shaft masonry. Summary of the invention

[0011] In order to overcome the problems existing in the prior art, the present invention provides an elevator guide rail, which can allow longitudinal displacement between the elevator guide rail and the elevator shaft masonry, thereby avoiding damage to the elevator guide rail due to slight contraction of the building.

[0012] To achieve the above-mentioned purpose, the elevator guide rail of the present invention includes a vertical arm and a horizontal arm, and the horizontal arm includes a first arm and a second arm; the second arm is clamped on the gasket and the elevator shaft wall by a connecting piece; the connecting piece includes a bolt, a nut and an annular plate; a center hole is provided at the center of the annular plate, and the annular plate is sleeved on the screw rod of the bolt through the center hole; the annular plate includes a raised portion protruding toward the second arm of the elevator guide rail and a flat portion arranged opposite to the raised portion; the raised portion is in direct contact with the upper surface of the second arm and applies a locking force to the second arm toward the elevator shaft wall; a downwardly extending limiting protrusion is provided on the lower surface of the flat portion; a limiting plate is also provided between the annular plate and the gasket; a limiting groove is provided on the upper surface of the limiting plate, and the limiting protrusion is clamped in the limiting groove.

[0013] The gasket is arranged between the horizontal arm of the elevator guide rail and the elevator shaft wall.

[0014] Through holes are provided at corresponding positions of the elevator shaft wall, gasket and limit plate, and the screw of the bolt passes through the through hole and passes through the center hole of the annular plate. The top of the screw is locked by a nut, and the nut applies a locking force to the annular plate toward the elevator shaft wall, and then the elevator guide rail is pressed against the gasket and the elevator shaft wall by the raised part of the annular plate.

[0015] A pressure cap is also arranged between the nut and the annular plate; the pressure cap comprises a raised top and a horizontal bottom, wherein the raised top protrudes toward the annular plate; and the horizontal bottom is in close contact with the lower surface of the nut.

[0016] A through hole is arranged at the center of the pressure cap, and the screw rod of the bolt passes through the through hole.

[0017] A groove matching the top of the protrusion of the pressure cap is arranged on the top surface of the annular plate.

[0018] The thickness of the central portion of the annular plate is greater than the thickness of the raised portion and also greater than the thickness of the flat portion.

[0019] The bottom of the central portion of the annular plate is provided with a protrusion facing the limiting plate.

[0020] A constricted portion is provided at the contacting position between the vertical arm and the horizontal arm.

[0021] A gap allowed by tolerance is arranged between the limit plate and the horizontal arm of the elevator guide rail, and the limit plate is used to limit the horizontal displacement of the elevator guide rail.

[0022] The present invention has the following advantages: compared with the prior art, the elevator guide rail of the present invention has a simple structure and low cost, and can allow longitudinal displacement between the elevator guide rail and the elevator shaft masonry, thereby avoiding damage to the elevator guide rail due to slight contraction of the building. At the same time, while allowing longitudinal displacement, it can also limit lateral displacement between the elevator guide rail and the elevator shaft masonry, thereby avoiding difficulty in elevator operation caused by lateral displacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the elevator guide rail described in the present invention. DETAILED DESCRIPTION

[0024] The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] like Figure 1 As shown, the elevator guide rail of the present invention includes a vertical arm 30 and a horizontal arm, and the horizontal arm includes a first arm 20 and a second arm 21; the second arm is clamped on a gasket 32 ​​and an elevator shaft wall 31 by a connecting member; the connecting member includes a bolt 34, a nut 35 and an annular plate 36; a center hole is provided at the center of the annular plate, and the annular plate is sleeved on the screw of the bolt 34 through the center hole; the annular plate includes a raised portion 37 protruding toward the second arm 21 of the elevator guide rail and a flat portion 33 arranged opposite to the raised portion; the raised portion is in direct contact with the upper surface of the second arm and applies a locking force to the second arm toward the elevator shaft wall 31; a downwardly extending limiting protrusion 39 is provided on the lower surface of the flat portion; a limiting plate 40 is also provided between the annular plate 36 and the gasket 32; a limiting groove is provided on the upper surface of the limiting plate, and the limiting protrusion is clamped in the limiting groove.

[0026] The gasket 32 ​​is arranged between the horizontal arm of the elevator guide rail and the elevator shaft wall 31.

[0027] Through holes are provided at corresponding positions of the elevator shaft wall 31, gasket 32 ​​and limit plate 40, and the screw of the bolt 34 passes through the through hole and passes through the center hole of the annular plate 36. The top of the screw is locked by a nut 35, and the nut applies a locking force to the annular plate 36 toward the elevator shaft wall 31, and then the elevator guide rail is pressed against the gasket 32 ​​and the elevator shaft wall 31 by the raised portion 37 of the annular plate 36.

[0028] A pressure cap 41 is further provided between the nut 35 and the annular plate 36; the pressure cap comprises a raised top and a horizontal bottom, wherein the raised top protrudes toward the annular plate 36; and the horizontal bottom is in close contact with the lower surface of the nut.

[0029] A through hole is provided at the center of the pressing cap 41, and the screw rod of the bolt 34 passes through the through hole.

[0030] A groove matching the top of the protrusion of the pressing cap 41 is provided on the top surface of the annular plate 36 .

[0031] The thickness of the central portion of the annular plate 36 is greater than the thickness of the raised portion 37 and also greater than the thickness of the flat portion 33 .

[0032] The bottom of the central portion of the annular plate 36 is provided with a protrusion facing the limiting plate 40 .

[0033] The contact portion between the vertical arm 30 and the horizontal arm is provided with a neck portion.

[0034] A gap allowed by tolerance is provided between the limit plate 40 and the horizontal arm of the elevator guide rail, and the limit plate 40 is used to limit the horizontal displacement of the elevator guide rail.

[0035] The elevator guide rail of the present invention directly contacts the upper surface of the second arm by the tilting portion and applies a locking force toward the elevator shaft wall 31 to the second arm. This locking force is perpendicular to the elevator shaft wall 31 and presses the elevator guide rail against the elevator shaft wall 31. Since the elevator guide rail does not form a completely rigid connection with the elevator shaft wall 31, longitudinal displacement between the elevator guide rail and the elevator shaft masonry is allowed. At the same time, since the limit plate 40 can limit the horizontal displacement of the elevator guide rail, and the limit protrusion 39 is stuck in the limit groove on the upper surface of the limit plate, the limit plate 40 itself will not be displaced in the lateral direction, thereby avoiding the uneven operation of the elevator due to the horizontal displacement of the elevator guide rail and will not cause damage to the elevator.

[0036] Further preferably, connectors may be provided on both the left and right sides of the elevator guide rail, so that the first arm 20 and the second arm 21 are clamped on the gasket 32 ​​and the elevator shaft wall 31 by their respective connectors.

[0037] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. An elevator guide rail, characterized in that: The elevator guide rail comprises a vertical arm and a horizontal arm, the horizontal arm comprises a first arm and a second arm; the second arm is clamped on the gasket and the elevator shaft wall by a connecting piece; the connecting piece comprises a bolt, a nut and an annular plate; a center hole is provided at the center of the annular plate, through which the annular plate is sleeved on the screw rod of the bolt; the annular plate comprises a raised portion protruding toward the second arm of the elevator guide rail and a flat portion arranged opposite to the raised portion; the raised portion is in direct contact with the upper surface of the second arm and applies a locking force to the second arm toward the elevator shaft wall; a downwardly extending limiting protrusion is provided on the lower surface of the flat portion; a limiting plate is also provided between the annular plate and the gasket; a limiting groove is provided on the upper surface of the limiting plate, and the limiting protrusion is clamped in the limiting groove; A pressure cap is also provided between the nut and the annular plate; the pressure cap comprises a raised top and a horizontal bottom, the raised top protruding toward the annular plate; the horizontal bottom is in close contact with the lower surface of the nut; A through hole is provided at the center of the pressure cap, and the screw rod of the bolt passes through the through hole; The top surface of the annular plate is provided with a groove matching the top of the protrusion of the pressure cap; A gap allowed by tolerance is arranged between the limit plate and the horizontal arm of the elevator guide rail, and the limit plate is used to limit the horizontal displacement of the elevator guide rail.

2. The elevator guide rail according to claim 1, characterized in that The gasket is arranged between the horizontal arm of the elevator guide rail and the elevator shaft wall.

3. The elevator guide rail according to claim 1, characterized in that Through holes are provided at corresponding positions of the elevator shaft wall, gasket and limit plate, and the screw of the bolt passes through the through hole and passes through the center hole of the annular plate. The top of the screw is locked by a nut, and the nut applies a locking force to the annular plate toward the elevator shaft wall, and then the elevator guide rail is pressed against the gasket and the elevator shaft wall by the raised part of the annular plate.

4. The elevator guide rail according to claim 1, characterized in that The thickness of the central portion of the annular plate is greater than the thickness of the raised portion and also greater than the thickness of the flat portion.

5. The elevator guide rail according to claim 1, characterized in that The bottom of the central portion of the annular plate is provided with a protrusion facing the limiting plate.

6. The elevator guide rail according to claim 1, characterized in that A constricted portion is provided at the contacting position between the vertical arm and the horizontal arm.

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