Super-large-width three-folding type elevator door guide rail
By using a prestressed traction mechanism in the elevator door guide rail to apply prestress on the long guide rail, the problem of increasing deflection of the long guide rail under load is solved, which improves durability and reduces the risk of door leaf scratches and jams.
Patent Information
- Application Number
- CN202422303672.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-20
AI Technical Summary
When the net door width of the elevator car is large, the bending stiffness of the long guide rail is relatively weak due to the increase in length, resulting in an increase in deflection under the action of load, affecting durability and may cause the door leaf to sink, scratch or jam.
An extra-large door wide three-fold elevator door guide rail is designed, which adopts an upper ridge frame plate, a long guide rail, a medium guide rail, a short guide rail, a first support frame and a second support frame. A prestressed traction mechanism is provided on both sides of the first support frame, and a prestressed traction center is applied to slow down the deflection increase rate.
It effectively slows down the deflection increase rate of long guide rails under load, improves the durability of long guide rails, reduces the risk of door leaf scratches and blockages, and makes the rail installation structure more compact, convenient installation and high durability.
Smart Images
Figure CN223032788U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of elevators and relates to an ultra-large door-width three-fold elevator door guide rail. Background Art
[0002] The three-fold elevator door is a special type of elevator door, which refers to a door leaf structure that can be folded into three parts when the elevator door is opened. The design of this door enables the elevator door to occupy less space when opened, thereby improving the utilization rate of the elevator hoistway. The three-fold elevator door is usually used in occasions where a larger opening width is required, such as freight elevators or service elevators in public places such as large shopping malls, supermarkets, and hospitals.
[0003] In the three-fold elevator door system, the elevator car door includes a fast door, a middle door, and a slow door, and also includes long guide rails, middle guide rails, and short guide rails with different lengths that cooperate with the above-mentioned car doors. When the net opening width of the elevator car is relatively large, when the long guide rail bears the fast door, the door hanging plate, and its own load, due to the increase in length, its flexural rigidity is relatively weakened, resulting in an increase in the deflection (i.e., the bending deformation of the long guide rail) under the action of the load. The increase in deflection will affect the durability of the long guide rail, thereby causing the door leaf to sink and the clearance with the sill to become smaller, and even posing a risk of door leaf scratching and jamming. Therefore, it is necessary to make improvements and enhancements. Summary of the Utility Model
[0004] The purpose of the utility model is to address the above problems existing in the prior art and propose an ultra-large door-width three-fold elevator door guide rail.
[0005] The purpose of the utility model can be achieved by the following technical solutions: An ultra-large door-width three-fold elevator door guide rail includes an upper sill frame plate, long guide rails, middle guide rails, and short guide rails arranged from long to short, and also includes a first support frame in the shape of an I and a second support frame in the shape of a C. The upper sill frame plate includes a main body part and side parts disposed on both sides of the main body part and perpendicular to the main body part. A pair of short guide rails are mirror-symmetrically fixed on the main body part. The second support frame is fixed on the main body part. A pair of middle guide rails are mirror-symmetrically arranged, and one end of the middle guide rail is fixed to the side part and the other end is fixed to the second support frame. Both ends of the long guide rail are fixed to the side parts. One end of the first support frame is fixed to the main body part and the other end is fixed to the middle of the long guide rail. Prestressed traction mechanisms are mirror-symmetrically arranged on both sides of the first support frame. The prestressed traction mechanism includes a traction sleeve, an adjustment sleeve, and a traction steel wire rope. The traction sleeve is penetrated and welded on the first support frame and the long guide rail. The adjustment sleeve is penetrated and welded on the main body part and is located directly above the first support frame. The traction steel wire rope slides through the traction sleeve and the adjustment sleeve, and both ends thereof are fixed with anchor heads. An adjustment nut that abuts against the anchor head is threadedly connected to the adjustment sleeve.
[0006] Preferably, from near to far relative to the main body are a short guide rail, a medium guide rail, and a long guide rail. The short guide rail and the medium guide rail have the same installation height, and the installation position of the long guide rail is above the short guide rail and the medium guide rail.
[0007] Preferably, after the traction steel wire rope is installed, it forms an angle of greater than or equal to 45° relative to the horizontal direction.
[0008] Preferably, a rubber ring sleeved outside the adjusting sleeve is embedded between the adjusting nut and the main body.
[0009] Preferably, several triangular reinforcing plates that are circumferentially unfolded at the inner end of the adjusting sleeve and are fixedly connected to the side surface of the main body are provided.
[0010] Preferably, an arc-shaped limiting groove for embedding the traction steel wire rope is formed at one end of the traction sleeve facing the main body.
[0011] Compared with the prior art, the utility model has the following advantages:
[0012] It can effectively slow down the increasing rate of the deflection of the long guide rail under the action of load, improve the durability of the long guide rail, and reduce the risk of the door leaf scratching and jamming; the guide rail installation structure is more compact, convenient to install, and has high durability. Description of the Drawings
[0013] Figure 1 is a schematic cross-sectional structure diagram of the whole of the utility model.
[0014] Figure 2 is a schematic cross-sectional structure diagram at the prestressed traction mechanism.
[0015] Figure 3 is a schematic cross-sectional structure diagram of the upper sill plate horizontally.
[0016] In the figure, 1. Upper sill plate; 11. Main body; 12. Side part; 2. Long guide rail; 3. Medium guide rail; 4. Short guide rail; 5. First support frame; 6. Second support frame; 7. Prestressed traction mechanism; 71. Traction sleeve; 711. Limiting groove; 72. Adjusting sleeve; 73. Traction steel wire rope; 74. Anchor head; 75. Adjusting nut; 76. Rubber ring; 8. Movable pulley block. Detailed Embodiment
[0017] The following are specific embodiments of the utility model and in combination with the drawings, the technical solutions of the utility model are further described, but the utility model is not limited to these embodiments.
[0018] As Figures 1 - 3As shown, a three-fold elevator door guide rail with an extra-large door width includes an upper sill frame plate 1 and a long guide rail 2, a middle guide rail 3, and a short guide rail 4 arranged from long to short, and also includes an I-shaped first support frame 5 and a C-shaped second support frame 6. The upper sill frame plate 1 includes a main body 11 and side portions 12 located on both sides of the main body 11 and arranged at 90 degrees to the main body 11. A pair of the short guide rails 4 are fixedly connected to the main body 11 in a mirror image, and the second support frame 6 is fixedly connected to the main body 11. A pair of the middle guide rails 3 are arranged in a mirror image, and one end of the middle guide rail 3 is fixedly connected to the side portion 12 and the other end is fixedly connected to the second support frame 6. Both ends of the long guide rail 2 are fixed to the side portion 12. One end of the first support frame 5 is fixedly connected to the main body 11 and the other end is fixedly connected to the middle part of the long guide rail 2. Prestressed traction mechanisms 7 are mirrored on both sides of the first support frame 5. The prestressed traction mechanism 7 includes a traction sleeve 71, an adjustment sleeve 72 and a traction wire rope 73. The traction sleeve 71 is penetrated and welded on the first support frame 5 and the long guide rail 2. The adjustment sleeve 72 is penetrated and welded on the main body 11 and is located directly above the first support frame 5. The traction wire rope 73 is slidably penetrated in the traction sleeve 71 and the adjustment sleeve 72 and anchor heads 74 are fixedly connected at both ends. An adjusting nut 75 that abuts against the anchor head 74 is threadedly connected to the adjusting sleeve 72.
[0019] The working principle of the utility model in actual application is as follows: the part of the long guide rail 2 with the largest bending deformation is located in the middle position farthest from the two ends. The middle part of the long guide rail 2 is fixedly connected to the main body 11 by the first support frame 5, and then prestressed traction mechanisms 7 are mirrored on both sides of the first support frame 5. During installation, the adjusting nut 75 is rotated to push the anchor head 74 at one end of the adjusting sleeve 72 to move, so as to drive the two anchor heads 74 to move away from each other. At this time, a prestress will be applied to the middle part of the long guide rail 2 along the direction of the traction wire rope 73, which is used to slow down the rate of increase of the deflection generated by the long guide rail under load, improve the durability of the long guide rail, and reduce the risk of scratching and jamming of the door leaf.
[0020] Furthermore, relative to the main body 11, from near to far, there are the short guide rail 4, the middle guide rail 3 and the long guide rail 2, the installation height of the short guide rail 4 and the middle guide rail 3 is the same, the installation position of the long guide rail 2 is located above the short guide rail 4 and the middle guide rail 3, and a movable pulley group 8 is installed on the door hanging plate that cooperates with the short guide rail 4 and the middle guide rail 3, and the installation height of the long guide rail 2 is staggered from the short guide rail 4 and the middle guide rail 3. This arrangement not only allows the long guide rail 2 to avoid the installation of the movable pulley group 8, making the guide rail installation structure more compact, but also makes the load distribution of the upper sill frame plate 1 more uniform, rather than concentrated at the lower end, which is beneficial to improving the durability of the upper sill frame plate 1.
[0021] Furthermore, if Figure 2As shown, after the traction steel wire rope 73 is installed, it forms an angle of greater than or equal to 45° relative to the horizontal direction. Applying a prestress in the direction of the traction steel wire rope 73 to the middle of the long guide rail 2, the prestress can be decomposed into a vertical direction and a horizontal direction. When the traction steel wire rope 73 forms an angle of greater than or equal to 45° relative to the horizontal direction after installation, the prestress in the vertical direction is greater than or equal to the prestress in the horizontal direction, which is more conducive to slowing down the increasing rate of the deflection of the long guide rail under the action of the load.
[0022] A rubber ring 76 sleeved outside the adjusting sleeve 72 is embedded between the adjusting nut 75 and the main body part 11. Vibration will occur during the up and down movement of the elevator. The rubber ring 76 is used to buffer the friction and collision between the anchor head 74 and the adjusting nut 75, and can also be used to shield the threads outside the adjusting sleeve 72 to prevent dust accumulation and rust, so as to improve durability.
[0023] A number of triangular reinforcing plates 721 that are circumferentially unfolded at the inner end of the adjusting sleeve 72 and are fixedly connected to the side surface of the main body part 11 are provided. In order to reduce the material cost and its own load, the thickness of the main body part 11 is generally relatively thin on the premise of ensuring strength. The function of the reinforcing plate 721 is to improve the welding strength between the adjusting sleeve 72 and the main body part 11.
[0024] Furthermore, as Figure 3 shown, an arc-shaped limiting groove 711 for embedding the traction steel wire rope 73 is opened at one end of the traction sleeve 71 facing the main body part 11. The limiting groove 711 is used to prevent the traction steel wire rope 73 from shaking and rubbing against the edge of the end of the traction sleeve 71, so as to improve the durability of the traction steel wire rope 73.
[0025] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.
Claims
1. A three-fold elevator door guide rail with an extra-large door width, comprising an upper sill frame plate (1) and a long guide rail (2), a middle guide rail (3), and a short guide rail (4) arranged from long to short, characterized in that: The invention also comprises an I-shaped first support frame (5) and a C-shaped second support frame (6), the upper sill frame plate (1) comprises a main body (11) and side portions (12) located on both sides of the main body (11) and arranged at 90 degrees to the main body (11), a pair of short guide rails (4) are fixedly connected to the main body (11) in a mirror-image manner, the second support frame (6) is fixedly connected to the main body (11), a pair of middle guide rails (3) are arranged in a mirror-image manner, and one end of the middle guide rail (3) is fixedly connected to the side portion (12) and the other end is fixedly connected to the second support frame (6), the two ends of the long guide rail (2) are fixed to the side portion (12), one end of the first support frame (5) is fixedly connected to the main body (11) and the other end is fixedly connected to the long guide rail (2). The guide rail (2) is fixedly connected in the middle, and prestressed traction mechanisms (7) are mirror-imaged on both sides of the first support frame (5), and the prestressed traction mechanism (7) comprises a traction sleeve (71), an adjustment sleeve (72) and a traction wire rope (73). The traction sleeve (71) is penetrated and welded on the first support frame (5) and the long guide rail (2), and the adjustment sleeve (72) is penetrated and welded on the main body (11) and is located directly above the first support frame (5). The traction wire rope (73) is slidably penetrated in the traction sleeve (71) and the adjustment sleeve (72) and anchor heads (74) are fixedly connected at both ends thereof. The adjustment sleeve (72) is threadedly connected with an adjustment nut (75) abutting against the anchor head (74).
2. The three-fold elevator door guide rail with extra-large door width according to claim 1, characterized in that: Relative to the main body (11), from near to far, there are the short guide rail (4), the middle guide rail (3) and the long guide rail (2); the installation height of the short guide rail (4) and the middle guide rail (3) is the same, and the installation position of the long guide rail (2) is located above the short guide rail (4) and the middle guide rail (3).
3. The three-fold elevator door guide rail with extra-large door width according to claim 1, characterized in that: After installation, the traction steel wire rope (73) is at an angle of greater than or equal to 45° relative to the horizontal direction.
4. The three-fold elevator door guide rail with extra-large door width according to claim 1, characterized in that: A rubber ring (76) sleeved on the outside of the adjusting sleeve (72) is embedded between the adjusting nut (75) and the main body (11).
5. The three-fold elevator door guide rail with extra-large door width according to claim 1, characterized in that: A plurality of reinforcing plates (721) are circumferentially extended from the inner end of the adjusting sleeve (72) and are in a triangular shape and fixedly connected to the side surface of the main body (11).
6. The three-fold elevator door guide rail with extra-large door width according to claim 1, characterized in that: An arc-shaped limiting groove (711) for the traction wire rope (73) to be embedded is formed at one end of the traction sleeve (71) facing the main body (11).