Chain breakage monitoring device for main driving chain of escalator

Abstract

The utility model discloses a chain breakage monitoring device for a main driving chain of an escalator. The chain breakage monitoring device comprises a bending piece, a beating rod, a limiting structure and a microswitch, the bending piece is arranged on a truss of the escalator; the beating rod is arranged below the main driving chain and is rotationally connected with the bending piece; the beating rod is of an L-shaped structure and is provided with a first long arm and a second long arm which are connected with each other; the first long arm extends below the main driving chain; the limiting structure is arranged on the bending piece and used for limiting the rotating angle of the beating rod relative to the bending piece; the microswitch is arranged on the bending piece, and the trigger end of the microswitch is in contact fit with the free end of the second long arm; when the beating rod rotates, the microswitch is triggered. The device can reduce the installation space of the whole structure, can be installed on the inner side or the outer side of the main driving chain, is flexible in installation mode, can limit the rotation position of the beating rod so as to prevent the beating rod from making contact with the rotation chain wheel, effectively meets the monitoring requirement of the main driving chain, and is high in practicability.

Description

Technical Field

[0001] The utility model relates to the technical field of escalators, in particular to a main drive chain breakage monitoring device for an escalator. Background Art

[0002] At present, in an escalator, during the operation of the main drive chain, it is necessary to monitor the breakage or excessive slack of the main drive chain. When the main drive chain breaks, the escalator is controlled to stop running to protect the safety of passengers.

[0003] In the prior art, such as the Chinese invention patent with the application number 201210485866.7, it discloses a breakage protection position for an escalator. A striking rod and a limit switch are installed on one side of the main drive chain. When the main drive chain breaks, the main drive chain drops and hits the striking rod, and the striking rod rotates to trigger the limit switch, and then the brake acts to stop the escalator from running. In the above technical solution, the striking rod is a long-arm structure, which occupies a large overall space. Generally, it can only be installed outside the annular main drive chain for breakage monitoring. The installation method is not flexible and it is difficult to meet the detection requirements of the main drive chain. In addition, the rotation position of the striking rod cannot be controlled. When the rotation angle of the striking rod is too large, there is a situation of contacting the rotating sprocket during movement, which is likely to damage the rotating sprocket. Summary of the Utility Model

[0004] Aiming at the above existing technical problems, the purpose of the utility model is to propose a main drive chain breakage monitoring device for an escalator, which can reduce the installation space of the overall structure, can be installed inside or outside the main drive chain, has a flexible installation method, and can limit the rotation position of the striking rod to prevent the striking rod from contacting the rotating sprocket, effectively meeting the monitoring requirements of the main drive chain and having strong practicability.

[0005] The technical solution of the utility model is realized as follows: A main drive chain breakage monitoring device for an escalator includes a bending member, a striking rod, a limiting structure, and a microswitch;

[0006] The bending member is arranged on the truss of the escalator;

[0007] The striking rod is arranged below the main drive chain and is rotatably connected to the bending member; the striking rod has an L-shaped structure and has a first long arm and a second long arm connected to each other; the first long arm extends below the main drive chain;

[0008] The limiting structure is arranged on the bending member and is used to limit the rotation angle of the striking rod relative to the bending member;

[0009] The microswitch is arranged on the bending member, and the trigger end of the microswitch is in contact and cooperation with the free end of the second long arm; when the striking rod rotates, the microswitch is triggered.

[0010] Further, the hitting rod is arranged inside the main drive chain and below the upper chain part of the main drive chain.

[0011] Further, the chain break monitoring device includes a C-shaped part, a T-shaped bolt, and a mating nut; the C-shaped part is fixed to the truss; the T-shaped end of the T-shaped bolt is slidably connected to the C-shaped part; the bending part is arranged on one side of the C-shaped part and has a fixed state of being fixed to the C-shaped part by the T-shaped bolt and the mating nut.

[0012] Further, a recessed part is provided at the free end of the second long arm; the microswitch includes a trigger roller; the trigger roller is received in the recessed part.

[0013] Further, the limiting structure includes limiting parts arranged on opposite sides of the first long arm or opposite sides of the second long arm.

[0014] Further, a rotating connection assembly is provided at the rotating connection position between the bending part and the hitting rod; the rotating connection assembly includes a sleeve and a bolt assembly; the sleeve is arranged between the bending part and the hitting rod; the bolt assembly penetrates between the hitting rod, the sleeve, and the bending part and has a pre-tightened state of locking the hitting rod, the sleeve, and the bending part to each other; in the pre-tightened state, the bolt assembly has a pre-tightening force that enables the hitting rod to rotate relative to the bending part.

[0015] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0016] 1. By the combined use of the hitting rod in the present utility model, when the main drive chain breaks or is overly loose, the main drive chain touches the hitting rod and drives the hitting rod to rotate, thereby driving the microswitch to be triggered and output a signal, and then controlling the escalator to stop running according to this signal. By designing the hitting rod as an L-shaped structure, the size of the hitting rod can be reduced, and thus the installation space of the overall structure can be reduced. The overall structure can be installed inside or outside the main drive chain, and the installation method is flexible, effectively meeting the assembly requirements.

[0017] 2. By the combined use of the limiting structure in the present utility model, the rotation position of the hitting rod can be limited to prevent the rotation angle of the hitting rod from being too large and contacting the return sprocket, effectively protecting the return sprocket, effectively meeting the monitoring requirements of the main drive chain, and having strong practicability.

[0018] 3. By the combined use of the C-shaped part and the T-shaped bolt in the present utility model, the up and down positions of the bending part and the hitting rod can be adjusted so that the distance between the hitting rod and the drive chain meets the requirements, and it has strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The following further illustrates the technical solution of the present utility model with reference to the drawings:

[0020] Figure 1 It is an assembly schematic diagram of the overall structure of the present utility model;

[0021] Figure 2 is Figure 1 the enlarged view at position A in

[0022] Figure 3 It is an assembly schematic diagram of the striking rod of the present utility model;

[0023] Figure 4 It is a structural schematic diagram of the bending part of the present utility model;

[0024] Figure 5 is Figure 4 the side view structural schematic diagram of

[0025] Wherein: 1, main drive chain; 11, rotary sprocket; 12, truss; 2, bending part; 21, limiting part; 3, rotating connection assembly; 31, sleeve; 32, bolt assembly; 4, striking rod; 41, first long arm; 42, second long arm; 421, recess; 5, micro switch; 51, trigger roller; 6, C-shaped part; 7, T-shaped bolt; 71, mating nut. Specific embodiments

[0026] The following combines the accompanying drawings to elaborate on the preferred embodiments of the present utility model, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present utility model.

[0027] As Figures 1-5 shown is a main drive chain 1 breakage monitoring device for an escalator according to this embodiment. Through this detection device, the breakage situation of the main drive chain 1 can be monitored, and in addition, the over-relaxation situation of the main drive chain 1 can also be monitored. The breakage monitoring device includes a bending part 2, a striking rod 4, a limiting structure, a micro switch 5, and a C-shaped part 6. Among them, the bending part 2 is formed by sheet metal bending and is arranged on the truss 12 of the escalator through the C-shaped part 6. Specifically, the C-shaped part 6 is fixed on the truss 12 and extends in the up and down direction. A T-shaped bolt 7 is assembled on the C-shaped part 6, and the T-shaped end of the T-shaped bolt 7 is slidably connected with the C-shaped part 6 to be able to adjust the up and down position. A mating nut 71 is arranged corresponding to the T-shaped bolt 7. The bending part 2 is arranged on one side of the C-shaped part 6, and an assembly hole for the T-shaped bolt 7 to penetrate is processed on the bending part 2. The bending part 2 is fixed on the C-shaped part 6 through the T-shaped bolt 7 and the mating nut 71 to form a fixed state. By loosening the mating nut 71, the bending part 2 can move up and down, so that the up and down position of the bending part 2 can be adjusted.

[0028] The foregoing striking rod 4 is arranged below the main drive chain 1. The striking rod 4 is connected to the bending member 2 through a rotating connection assembly 3 so as to be able to rotate up and down relative to the bending member 2. Through the above structural design, when the main drive chain 1 breaks or is overly slack, the main drive chain 1 touches the striking rod 4 so as to be able to drive the striking rod 4 to rotate.

[0029] In this embodiment, the striking rod 4 can be arranged inside the main drive chain 1, and a monitoring distance is formed between the striking rod 4 and the upper chain part of the main drive chain 1. In addition, the striking rod 4 can also be arranged below the outside of the main drive chain 1 to form a monitoring distance with the lower chain part of the main drive chain 1.

[0030] Specifically, the striking rod 4 of this embodiment has an L-shaped structure and has a first long arm 41 and a second long arm 42 that are connected to each other. The first long arm 41 extends below the main drive chain 1 and forms an up-and-down distance with the main drive chain 1. In the initial state, the second long arm 42 extends in the up-and-down direction. The foregoing microswitch 5 is installed on the bending member 2, and the microswitch 5 is a conventional component of the prior art. The trigger end of the microswitch 5 is in contact and cooperation with the free end of the second long arm 42. When the striking rod 4 rotates, the microswitch 5 is triggered, thereby outputting a trigger signal. The escalator central control system controls the braking action according to this trigger signal to control the escalator to stop running.

[0031] A recess 421 is machined on the free end of the foregoing second long arm 42. The microswitch 5 includes a trigger roller 51. The trigger roller 51 is arranged at the trigger end of the microswitch 5. The trigger roller 51 is received in the recess 421. Through the above structural design, the second long arm 42 can be in full contact with the microswitch 5, making the triggering of the microswitch 5 more sensitive and stable.

[0032] In this embodiment, the foregoing limiting structure is fixed on the bending member 2 and is used to limit the rotation angle of the striking rod 4 relative to the bending member 2. The limiting structure includes limiting parts 21 arranged on opposite sides of the first long arm 41 or opposite sides of the second long arm 42. The limiting parts 21 are integrally formed on the bending member 2 by bending. When the striking rod 4 rotates a certain angle, the striking rod 4 contacts the limiting parts 21 to limit the further rotation of the striking rod 4. Through the limitation of the limiting parts 21, the striking rod 4 is prevented from rotating too large an angle and contacting the return sprocket 11.

[0033] In this embodiment, the aforementioned rotating connection assembly 3 is connected to the middle position of the striking rod 4. The rotating connection assembly 3 includes a sleeve 31 and a bolt assembly 32. The sleeve 31 is installed between the bending member 2 and the striking rod 4. The bolt assembly 32 penetrates between the striking rod 4, the sleeve 31 and the bending member 2, and has a pre-tightened state that locks the striking rod 4, the sleeve 31 and the bending member 2 to each other. In the pre-tightened state, the bolt assembly 32 has a pre-tightening force that enables the striking rod 4 to rotate relative to the bending member 2. Under the action of this pre-tightening force, after assembly, an initial state of relative fixation is formed between the striking rod 4 and the bending member 2. Moreover, when the striking rod 4 is acted upon by the external force of the main drive chain, the striking rod 4 can rotate relative to the bending member 2.

[0034] During specific assembly, the striking rod 4 is fixed to the bending member 2 through the bolt assembly 32 and the sleeve 31. The microswitch 5 is fixed to the bending member 2, and the trigger roller 51 of the microswitch 5 is received in the recess 421 of the second long arm 42 of the striking rod 4. The bending member 2 is installed on the C-shaped member 6 through the T-shaped bolt 7 and the mating nut 71. By loosening the mating nut 71, the up-and-down position of the bending member 2 can be adjusted, and thus the distance between the first long arm 41 of the striking rod 4 and the main drive chain 1 can be adjusted. When the main drive chain 1 breaks or becomes overly loose, the main drive chain 1 touches the striking rod 4 and drives the striking rod 4 to rotate, thereby driving the microswitch 5 to be triggered and output a signal. Subsequently, the escalator is controlled to stop running according to this signal. In the above method, the striking rod 4 is designed as an L-shaped structure to reduce the size of the striking rod 4, and thus the installation space of the overall structure can be reduced. The overall structure can be installed inside or outside the main drive chain 1, and the installation method is flexible, effectively meeting the assembly requirements. The limiting portion 21 on the bending member 2 can limit the rotation position of the striking rod 4 to prevent the rotation angle of the striking rod 4 from being too large and contacting the return sprocket 11, effectively protecting the return sprocket 11 and effectively meeting the monitoring requirements of the main drive chain 1, with strong practicability.

[0035] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An escalator main drive chain break monitoring device, comprising a bending part, a beating rod, a limit structure, and a micro switch; characterized in that: The bending member is arranged on the truss of the escalator; The beating rod is arranged below the main driving chain and is rotatably connected to the bending member; the beating rod is L-shaped and has a first long arm and a second long arm connected to each other; the first long arm extends to the bottom of the main driving chain; The limiting structure is arranged on the bending part, and is used to limit the rotation angle of the beating stick relative to the bending part; The micro switch is arranged on the bending part, and the triggering end of the micro switch contacts and cooperates with the free end of the second long arm; when the beating stick rotates, the micro switch is triggered.

2. The escalator main drive chain break monitoring device according to claim 1, characterized in that: The beating rod is arranged inside the main driving chain and below the upper chain part of the main driving chain.

3. The escalator main drive chain break monitoring device according to claim 1, characterized in that: The chain break monitoring device includes a C-shaped part, a T-shaped bolt, and a matching nut; the C-shaped part is fixed on the truss; the T-shaped end of the T-shaped bolt is slidably connected to the C-shaped part; the bending part is arranged on one side of the C-shaped part, and is fixed on the C-shaped part by the T-shaped bolt and the matching nut.

4. The escalator main drive chain break monitoring device according to claim 1, characterized in that: A recessed portion is provided on the free end of the second long arm; the micro switch comprises a trigger roller; and the trigger roller is accommodated in the recessed portion.

5. The escalator main drive chain break monitoring device according to claim 1, characterized in that: The limiting structure includes limiting parts arranged on two opposite sides of the first long arm or on two opposite sides of the second long arm.

6. The escalator main drive chain break monitoring device according to claim 1, characterized in that: A rotating connection assembly is provided between the bending part and the beating rod at the rotating connection position; the rotating connection assembly includes a sleeve and a bolt assembly; the sleeve is provided between the bending part and the beating rod; the bolt assembly is inserted between the beating rod, the sleeve and the bending part, and has a pre-tightening state for locking the beating rod, the sleeve and the bending part with each other; in the pre-tightening state, the bolt assembly has a pre-tightening force that enables the beating rod to rotate relative to the bending part.

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