A footboard suitable for shallow pit elevator

Abstract

The present application discloses a footboard suitable for shallow pit elevators, comprising: a first footboard mounted on the sill, and a second footboard slidably foldable relative to the first footboard, and further comprising: a driving member fixedly mounted relative to the shaft; a linkage rod rotatably mounted on the car bottom platform, one end of the linkage rod being a driving end matched with the driving member, and the other end being a swing end; a traction rope, one end of the traction rope being connected to the swing end, and the other end being connected to the second footboard. The footboard suitable for shallow pit elevators provided by the present application can automatically fold and unfold the footboard through a mechanical structure, has low production cost, good working stability, and is energy-saving and environmentally friendly.

Description

Technical Field

[0001] The present application relates to the technical field of elevators, and in particular to a toe guard suitable for shallow pit elevators. Background Art

[0002] The elevator door toe guard is installed below the door sill to prevent people from being cut and injured by the descending car after entering the shaft by mistake. The vertical height of the toe guard is an important factor in ensuring passenger safety. The national standard GB7588-2003 requires that the vertical height of the car toe guard should not be less than 750mm. In actual use, many elevators are affected by the installation environment. Especially when installing elevators in old buildings, the depth of the elevator pit is limited by underground pipes and other facilities, resulting in interference between the toe guard and the pit after the car is completely lowered. Summary of the invention

[0003] Based on this, an elevator car toe guard suitable for shallow pits is provided, which has high working reliability, is safe and stable, and is energy-saving and environmentally friendly.

[0004] A toeboard suitable for a shallow pit elevator comprises: a first toeboard installed on a sill, and a second toeboard slidably foldable relative to the first toeboard, and further comprises:

[0005] A drive member fixedly mounted relative to the hoistway;

[0006] A linkage rod is rotatably mounted on the car bottom platform, wherein one end of the linkage rod is a driving end matched with the driving member, and the other end is a swinging end;

[0007] A traction rope, one end of which is connected to the swing end, and the other end of which is connected to the second foot guard plate.

[0008] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0009] Optionally, it also includes a reversing wheel arranged on the car bottom platform for changing the extending direction of the traction rope.

[0010] Optionally, the axis of the reversing wheel is parallel to the horizontal plane.

[0011] Optionally, the driving member and the reversing wheel are respectively located on two sides of the rotation axis of the linkage rod.

[0012] Optionally, the reversing wheel is provided with a limiting groove for accommodating the traction rope, and is also provided with a blocking rod for preventing the traction rope from escaping from the limiting groove.

[0013] Optionally, the distance between the driving end and the rotation axis of the linkage rod is smaller than the distance between the swing end and the rotation axis of the linkage rod.

[0014] Optionally, the plane on which the rotation trajectory of the linkage rod lies is perpendicular to the surface of the toe guard.

[0015] Optionally, a mounting bracket is provided at the bottom of the car bottom platform, the linkage rod is rotatably mounted on the mounting bracket via a rotating shaft, and the linkage rod is provided with a strip hole for penetrating the rotating shaft.

[0016] Optionally, the portion where the traction rope is connected to the second toe guard plate is located at the bottom end of the second toe guard plate.

[0017] Optionally, a safety switch is provided on the first toe guard plate, and a trigger member cooperating with the safety switch to confirm the deployed state is provided on the second toe guard plate.

[0018] The toe guard provided in the present application and suitable for shallow pit elevators can automatically fold and unfold the toe guard through a mechanical structure, has low production cost, good working stability, and is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional view of a toeboard applicable to a shallow pit elevator in the present application (the second toeboard is in an unfolded state);

[0020] Figure 2 A schematic diagram of a toe guard applicable to a shallow pit elevator in the present application;

[0021] Figure 3 A side view of a toe guard applicable to a shallow pit elevator in the present application (the second toe guard is in an unfolded state);

[0022] Figure 4 A three-dimensional view of a toeboard applicable to a shallow pit elevator in the present application (the second toeboard is in a folded state);

[0023] Figure 5 This is a side view of the toeboard applicable to the shallow pit elevator in the present application (the second toeboard is in a folded state);

[0024] Figure 6 for Figure 1 A magnified view of part A in FIG.

[0025] Figure 7 for Figure 1 A magnified view of part B in FIG.

[0026] Figure 8 This is a schematic diagram of the cooperation between the safety switch and the trigger member in the footboard of a shallow pit elevator applicable to the present application;

[0027] Figure 9aA side view of a guide rail in a toeboard of a shallow pit elevator applicable to the present application;

[0028] Figure 9b for Figure 9a C-direction view in;

[0029] Fig.9c This is a schematic diagram of the guide rail in the toeboard of a shallow pit elevator applicable to the present application.

[0030] In the figure: 1. car bottom platform; 2. driving member; 3. mounting bracket; 4. linkage rod; 41. driving end; 42. swing end; 43. strip hole; 5. first footboard; 6. second footboard; 61. folding edge; 7. first guide member; 71. guide groove; 72. bottom screw hole; 73. side screw hole; 74. mounting hole; 75. slide groove; 8. reinforcement plate; 81. strip hole; 9. traction rope; 10. sill; 11. guide strip; 12. reversing wheel; 13. gear lever; 14. support; 15. trigger member; 16. safety switch; 17. second guide member; 18. fixing clamp. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0032] In order to better describe and illustrate the embodiments of the present application, reference may be made to one or more drawings, but the additional details or examples used to describe the drawings should not be considered as limiting the scope of the invention of the present application, any of the currently described embodiments or preferred methods.

[0033] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] See also Figure 1As shown, a toeboard suitable for a shallow pit elevator comprises: a first toeboard 5 installed on a sill 10, and a second toeboard 6 slidably foldable relative to the first toeboard 5, and further comprises:

[0036] A driving member 2 fixedly mounted relative to the hoistway;

[0037] A linkage rod 4 is rotatably mounted on the car bottom platform 1, one end of the linkage rod 4 is a driving end 41 matched with the driving member 2, and the other end is a swing end 42;

[0038] A traction rope 9 , one end of which is connected to the swing end 42 , and the other end of which is connected to the second foot guard plate 6 .

[0039] See also Figure 3 As shown, when the elevator car has not reached the pit, the second footboard 6 is in the unfolded state, see Figure 5 As shown, when the elevator car approaches the elevator pit, the driving member 2 acts on the driving end 41 of the linkage rod 4 to rotate the linkage rod 4, and the swinging end 42 of the linkage rod 4 pulls the second foot guard 6 to move upward, and the second foot guard 6 switches to a folded state to avoid interference with the pit.

[0040] When the elevator car reaches the pit position, the second toe guard 6 is automatically retracted through the action of the driving member 2, thereby reducing the space occupied by the toe guard, so that the toe guard can be stably accommodated in the shallow pit when the car descends to the bottom position; when the elevator car leaves the pit, the linkage rod 4 is separated from the action of the driving member 2 and reset, and the second toe guard 6 switches to the unfolded state under the action of its own gravity to ensure that the vertical height of the toe guard reaches more than 750mm, thereby effectively blocking and protecting the passengers, and having good safety and working stability.

[0041] When the elevator car approaches the pit, it decelerates until it stops. When the elevator leaves the pit, it gradually accelerates from rest. In the present application, the action of the linkage rod 4 is performed when the car speed is slow, and the corresponding folding and unfolding process of the second foot guard plate 6 is also relatively smooth and orderly. Compared with the bending or electrically controlled lifting method in the prior art, the stress deformation of the mechanical parts can be effectively reduced.

[0042] By adjusting the height of the driving member 2, the position of the reversing wheel 12, the length of the linkage rod 4, and the fixed position of the end of the traction rope 9, different movable strokes of the second toe guard 6 can be coordinated.

[0043] When the second foot guard 6 is switched between the unfolded state and the folded state, it does not need to be assisted by electronic equipment, the production cost of the linkage rod 4 and the traction rope 9 is low, and the reliability is extremely high.

[0044] See also Figure 1As shown, the bottom of the second toe guard 6 is provided with a folded edge 61 which is arranged obliquely relative to the vertical plane. When the second toe guard 6 descends and touches a foreign object, the guiding effect of the folded edge 61 can effectively reduce the damage.

[0045] The first foot guard 5 and the second foot guard 6 are provided with mutually cooperating guide mechanisms, which can take various forms, see Figure 1 As shown, the first foot guard plate 5 is provided with guide grooves 71 on two opposite sides in the horizontal direction.

[0046] Two opposite sides of the second foot guard plate 6 in the horizontal direction are provided with guide strips 11 matching with the corresponding guide grooves 71 .

[0047] The guide mechanisms on both sides in the horizontal direction can improve the stability of the movement of the second foot guard 6 and avoid the second foot guard 6 from getting stuck.

[0048] See also Figure 9a , Figure 9b , Fig.9c As shown, the guide groove 71 is a dovetail groove, and the guide strip 11 has a cross-sectional shape corresponding to the dovetail groove shape. During the mutual folding and unfolding of the first toe guard 5 and the second toe guard 6, the guide strip 11 only performs linear reciprocating motion in the guide groove 71.

[0049] The first foot guard 5 is a plate member, and first folding edges are respectively provided on both sides of the first foot guard 5 in the horizontal direction. The guide groove 71 is provided on the first guide member 7, see Figure 9a , Figure 9b , Fig.9c The first guide component 7 is provided with a bottom edge abutting against the first folded edge, and a side edge abutting against the first foot guard plate 5, and screw holes are respectively provided on the bottom edge and the side edge. The first guide component 7 is fixedly installed on the first foot guard plate 5 by bolts passing through the bottom edge screw holes 72 and the first folded edge, and bolts passing through the side edge screw holes 73 and the first foot guard plate 5.

[0050] The second foot guard 6 is a plate member, and second folded edges are respectively provided on both sides of the second foot guard 6 in the horizontal direction. The guide strip 11 is arranged on the second guide component 17. The guide strip 11 and the second guide component 17 can be an integral structure. The second guide component 17 is in contact with the second folded edge and fixed by bolts.

[0051] The second guide member 17 is used not only to support the guide bar 11 , but also to play a certain balancing role together with the guide bar 11 , so that the second foot guard 6 can maintain the consistency of displacement on both sides in the horizontal direction during the movement.

[0052] When the second foot guard 6 is in the expanded state, the second guide component 17, the guide bar 11 and the gravity of the second foot guard 6 can keep the second foot guard 6 in the expanded state, that is, within a certain upward thrust range, the second foot guard 6 can maintain the expanded state, further ensuring safety and working stability.

[0053] In a top view in the use state, the first guide member 7 and the second guide member 17 are located between the first folded edge and the second folded edge, and the guide strip 11 and the guide groove 71 are slidably matched with each other.

[0054] The first guide component 7 and the second guide component 17 can correspondingly increase the force strength of the first foot guard 5 and the second foot guard 6, prevent the board surfaces of the first foot guard 5 and the second foot guard 6 from being deformed, and improve safety and reliability.

[0055] For increased security, see Figure 8 As shown, a safety switch 16 is disposed on the first foot guard 5, and a trigger member 15 is disposed on the second foot guard 6 for cooperating with the safety switch 16 to confirm the unfolded state. Figure 8 In order to express the structure clearly, perspective drawing is used.

[0056] See also Figure 9a As shown, a slide groove 75 is provided on the side of the first guide member 7, and the length of the slide groove 75 defines the travel of the trigger member 15. Figure 8 As shown, the trigger member 15 is a trigger rod, which is fixed at the top of the second foot guard 6, passes through the slide groove 75 and extends to the inside of the guide groove 71 to cooperate with the safety switch 16. The cooperation between the trigger rod and the slide groove 75 also plays a certain guiding role in the movement of the second foot guard 6, making the movement of the second foot guard 6 smoother.

[0057] See also Fig.9c As shown, a mounting hole 74 is provided on the bottom edge of the first guide member 7, and the safety switch 16 is fixed on the first guide member 7. The contact arm of the safety switch 16 passes through the mounting hole 74 and extends into the guide slot 71 to cooperate with the trigger rod. The safety switch 16 is an electrical switch.

[0058] The safety switch 16 is fixed to the bottom end of the first foot guard 5. When the first foot guard 5 and the second foot guard 6 are in the unfolded state, the trigger 15 triggers the safety switch 16. When the second foot guard 6 is folded relative to the first foot guard 5, the trigger 15 is disengaged from the safety switch 16. Through the cooperation of the trigger 15 and the safety switch 16, the abnormality of the unfolded state of the second foot guard 6 is discovered in time to ensure safety.

[0059] At least one safety switch 16 is provided on the first foot guard 5, and correspondingly, a corresponding trigger member 15 is provided on the second foot guard 6. In order to improve safety, safety switches 16 can also be provided on both sides of the first foot guard 5 in the horizontal direction, and corresponding trigger members 15 can be provided on both sides of the second foot guard 6 in the horizontal direction. The accuracy of the detection of the unfolded state of the second foot guard 6 is ensured by the redundant settings on both sides.

[0060] When there is a foreign object (person or object) under the toe guard in the shaft, the elevator car descends and the second toe guard 6 first touches the foreign object. When the force exerted by the foreign object on the second toe guard 6 is greater than the gravity of the second guide component 17, the guide strip 11 and the second toe guard 6, the second toe guard 6 folds upward, the trigger 15 disengages from the safety switch 16, and the elevator stops running to prevent the car from continuing to descend and causing damage to the foreign object. Compared with the second toe guard 6 being set to a bent shape or an overall rigid structure, it is safer.

[0061] The driving member 2 is fixed relative to the shaft, and can be arranged at the bottom of the pit or fixed on the shaft wall. If the driving member 2 and the second foot guard 6 are located on the same side of the rotation axis of the linkage rod 4, it is not necessary to arrange Figure 1 The reversing wheel 12 shown in the figure directly drives the driving end 41 of the linkage rod 4 to move through the driving member 2, and the traction rope 9 pulls the second foot guard plate 6 to move upward or downward in the same direction as the driving end 41.

[0062] The contact surface between the driving member 2 and the linkage rod 4 is point contact or line contact (the top surface of the driving member 2 can be set as a horizontal plane). By reducing the contact area, the noise caused by the collision is effectively reduced, and the relative slip between the linkage rod 4 and the driving member 2 is facilitated, making the rotation process of the linkage rod 4 smoother, extending the service life, and improving the safety of taking the elevator.

[0063] The driving member 2 and the second foot guard 6 are located on both sides of the rotation axis of the linkage rod 4, see Figure 3 , Figure 5 As shown, the car further includes a reversing wheel 12 arranged on the car bottom platform 1 for changing the extending direction of the traction rope 9 .

[0064] See also Figure 5 As shown, when the second toe guard 6 rises to the highest position, the driving end 41 of the linkage rod 4 is located at the upper limit position, the swing end 42 of the linkage rod 4 is located at the lower limit position, the wrap angle of the traction rope 9 on the reversing wheel 12 is the largest, and the winding state of the traction rope 9 on the reversing wheel 12 is the most stable, so that the second toe guard 6 is stably maintained in the folded state.

[0065] See also Figure 7As shown, a support 14 is installed at the bottom of the car platform, and a reversing wheel 12 is installed on the support 14 through a rotating shaft. The reversing wheel 12 is arranged adjacent to one side of the foot guard, and the axis of the reversing wheel 12 is parallel to the horizontal plane. The reversing wheel 12 is provided with a limiting groove for accommodating the traction rope 9, and a stopper bar for preventing the traction rope 9 from escaping from the limiting groove. When the second foot guard 6 is subjected to force below, the stopper bar 13 is used to prevent the traction rope 9 from escaping from the limiting groove, thereby improving stability and reliability.

[0066] The two ends of the traction rope 9 are respectively fixed to the swing end 42 of the linkage rod 4 and the second foot guard plate 6. There are many ways to fix the traction rope 9, for example, see Figure 6 As shown, the end of the traction rope 9 is fixed to the swing end 42 or the second foot guard 6 via a fixing clamp 18 .

[0067] The fixing clamp 18 includes a threaded barrel and a clamping screw. The barrel wall is provided with relatively arranged through holes. One end of the barrel is closed as the bottom of the barrel. The outer periphery of the barrel is provided with a limiting step. The wire rope passes through the through hole. By rotating the clamping screw, the end of the clamping screw and the bottom of the barrel are matched to clamp and fix the wire rope.

[0068] The length of the wire rope can be easily adjusted by rotating the compression screw, which is convenient for replacing parts on site and also convenient for later maintenance.

[0069] See also Figure 3 , Figure 5 As shown, the distance between the driving end 41 and the rotation axis of the linkage rod 4 is smaller than the distance between the swing end 42 and the rotation axis of the linkage rod 4, that is, the force arm of the driving end 41 is smaller than the force arm of the swing end 42, and the driving end 41 has a smaller stroke to meet the movement stroke of the second foot guard 6.

[0070] The linkage rod 4 is a rod with the same cross-section, and the distance between the driving end 41 and the rotation axis of the linkage rod 4 is smaller than the distance between the swing end 42 and the rotation axis of the linkage rod 4. The gravity of the swing end 42 can be made greater than the gravity of the driving end 41, so that the traction rope 9 can always remain in a tensioned state during the folding and unfolding process of the second foot guard 6, thereby improving the stability of the movement of the second foot guard 6.

[0071] See also Figure 1 As shown, the plane where the rotation track of the linkage rod 4 is located is perpendicular to the board surface of the footboard. A mounting bracket 3 is provided at the bottom of the car bottom platform 1, and the mounting bracket 3 is arranged away from the footboard. The linkage rod 4 is rotatably mounted on the mounting bracket 3 through a rotating shaft, and a strip hole 43 for passing the rotating shaft is provided on the linkage rod 4.

[0072] The strip hole 43 extends along the length direction of the linkage rod 4. The strip hole 43 can play a certain position adjustment role in the rotation process of the linkage rod 4, increase the rotation freedom of the linkage rod 4, reduce the force of the shaft on the linkage rod 4, and extend the service life of the linkage rod 4.

[0073] See also Figure 1 As shown, the portion where the traction rope 9 is connected to the second foot guard plate 6 is located at the bottom end of the second foot guard plate 6 .

[0074] A reinforcing plate 8 is provided on the second foot guard 6 . The reinforcing plate 8 is located in the middle of the second foot guard 6 in the horizontal direction. The traction rope 9 is connected to the reinforcing plate 8 .

[0075] At least two strip holes 81 are provided on the reinforcing plate 8, and each strip hole 81 extends along the running direction of the second foot guard plate 6. The fixing clamp 18 for fixing the end of the traction rope 9 is located in one of the strip holes 81 (specifically, the cylindrical part of the fixing clamp 18 is located in one of the strip holes 81, and the limiting step is against the reinforcing plate 8), and can move in the strip hole 81.

[0076] When the toe guard is subjected to vibration or oblique force, the movement of the fixing clip 18 in the strip hole 81 can avoid affecting the linkage rod 4 and the reversing wheel 12, and prevent the components from bending or loosening due to excessive vibration, thereby improving safety.

[0077] The application has a simple and ingenious design, low cost, high stability, long service life, is convenient for factory mass production, easy installation, and convenient later maintenance.

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A toe guard suitable for a shallow pit elevator, comprising: A first footboard installed on the sill, and a second footboard slidably foldable relative to the first footboard, characterized in that it also includes: A drive member fixedly mounted relative to the hoistway; A linkage rod is rotatably mounted on the car bottom platform, wherein one end of the linkage rod is a driving end matched with the driving member, and the other end is a swinging end; A traction rope, one end of which is connected to the swing end, and the other end of which is connected to the second foot guard, and the end of the traction rope is fixed to the swing end or the second foot guard by a fixing clip; A mounting bracket is provided at the bottom of the car bottom platform, the linkage rod is rotatably mounted on the mounting bracket via a rotating shaft, and a strip hole for penetrating the rotating shaft is provided on the linkage rod; The second toe guard is provided with a reinforcing plate, which is located in the middle of the second toe guard in the horizontal direction. The traction rope is connected to the reinforcing plate. The reinforcing plate is provided with at least two strip holes, each of which extends along the running direction of the second toe guard. The fixing clamp for fixing the end of the traction rope is located in one of the strip holes and can move in the strip hole.

2. The toeboard suitable for shallow pit elevator according to claim 1, characterized in that: It also includes a reversing wheel arranged on the car bottom platform for changing the extending direction of the traction rope.

3. The toeboard for shallow pit elevators according to claim 2, characterized in that: The axis of the reversing wheel is parallel to the horizontal plane.

4. The toe guard for shallow pit elevators according to claim 2, characterized in that: The driving member and the reversing wheel are respectively located on two sides of the rotation axis of the linkage rod.

5. The toe guard for shallow pit elevators according to claim 2, characterized in that: The reversing wheel is provided with a limiting groove for accommodating the traction rope, and is also provided with a blocking rod for preventing the traction rope from escaping from the limiting groove.

6. The toeboard suitable for shallow pit elevator according to claim 1, characterized in that: The distance between the driving end and the rotation axis of the linkage rod is smaller than the distance between the swing end and the rotation axis of the linkage rod.

7. The toeboard for shallow pit elevators according to claim 1, characterized in that: The plane where the rotation track of the linkage rod is located is perpendicular to the board surface of the foot guard board.

8. The toe guard for shallow pit elevators according to claim 1, characterized in that: The portion where the traction rope is connected to the second foot guard is located at the bottom end of the second foot guard.

9. The toe guard for shallow pit elevators according to claim 1, characterized in that: The first toe guard is provided with a safety switch, and the second toe guard is provided with a trigger member that cooperates with the safety switch to confirm the unfolded state.

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