A safety protection device for the comb teeth of an escalator or moving walk

Abstract

The present invention provides a comb tooth safety protection device, which is applied to an automatic elevator device. The automatic elevator device is an escalator or a moving walkway; it includes: an action link, the first end of the action link is connected to the comb plate of the automatic elevator device to form a first rotating pair; an action rotating shaft, the first end of the action rotating shaft is connected to the second end of the action link to form a second rotating pair, and a switch triggering mechanism is formed on the action rotating shaft, and the switch triggering mechanism is arranged near the safety switch of the automatic elevator device; when the comb plate has an abnormal displacement, the action rotating shaft is driven to rotate through the first rotating pair and the second rotating pair, and the switch triggering mechanism contacts the safety switch to trigger the safety switch to act to stop the operation of the automatic elevator device. Only one safety switch can be used to detect the displacement of the comb plate in multiple directions, and it can be applied to different specifications of escalators, such as escalators and moving walkways, and even special-shaped escalators such as spiral escalators, making the product have the advantages of low cost, wide applicability, and easy maintenance.

Description

Technical Field

[0001] The present invention relates to the field of safety devices for escalators and moving walks, and particularly to a safety protection device for the comb teeth of an escalator or a moving walk. Background Art

[0002] According to the provisions of 5.7.3.2.6 in GB16899-2011 for escalators and moving walks, when foreign objects are stuck and cause the comb teeth to fail to mesh properly with the steps or pallets, the escalator or moving walk should stop running automatically. When foreign objects are stuck between the comb plate and the step or pallet support, the front end of the comb plate will displace upward or backward. Currently, the comb plate safety devices configured on escalators in the market determine whether to trigger the safety switch to stop the escalator by detecting the displacement of the comb plate in the vertical and front-back directions.

[0003] For the patent of the comb plate safety device with the publication number CN108861988A, two safety switches are used to detect the displacement of the comb plate in two directions respectively. Then, six safety switches need to be configured for each escalator, increasing the hardware cost of the escalator.

[0004] For the patent of the comb plate safety device with the publication number CN109502467A, a structure of movable comb teeth is adopted. The comb plate is divided into a fixed side and a rotating side. An installation groove is provided at the connecting rotating shaft of the rotating position of the comb plate. There are a switch stopper, a limit switch and a return spring in the installation groove. However, the comb teeth of this structure are complex in structure and difficult to manufacture. The strength at the rotating shaft is poor. Once foreign objects are stuck, the comb teeth will surely be damaged, and the cost of replacing the comb teeth will be higher. And after using for a period of time, there will be situations such as dust accumulation or rusting of the return spring, resulting in the comb teeth being unable to reset normally.

[0005] For the patent of the comb plate safety device with the publication number CN109516359A, the comb plate is fixed on the comb plate seat through four hinge rods, and its initial position is tilted forward. In order to prevent the comb plate from shaking when people step on the comb plate, the hinge rods need a very large torque, which may cause the comb plate to have insufficient displacement after foreign objects are stuck. And when the action mechanism of this invention acts, the hinge rods turn from the inclined state to the vertical state, and the front-back displacement of the screw gradually becomes smaller. At the same time, there is no displacement amplification mechanism, and it is impossible to ensure that there is enough stroke to cause the switch to act. Summary of the Invention

[0006] The present invention provides a safety protection device for the comb teeth of an escalator or a moving walk, aiming to solve the technical problems in the prior art such as the large number of safety switches used in escalators, high cost, complex structure, and large occupied space.

[0007] A comb tooth safety protection device is applied to an automatic elevator device, and the automatic elevator device is an escalator or a moving walkway; it includes:

[0008] An action link, the first end of the action link is connected to the comb plate of the automatic elevator device to form a first rotating pair;

[0009] An action rotating shaft, the first end of the action rotating shaft is connected to the second end of the action link to form a second rotating pair, and a switch triggering mechanism is formed on the action rotating shaft, and the switch triggering mechanism is arranged near the safety switch of the automatic elevator device;

[0010] When the comb plate has an abnormal displacement, the action rotating shaft is driven to rotate through the first rotating pair and the second rotating pair, and the switch triggering mechanism contacts the safety switch to trigger the safety switch to act, so as to stop the operation of the automatic elevator device.

[0011] Further, the action link includes:

[0012] A link body;

[0013] A link rotating shaft, which is fixed at the first end of the link body and fixed on the comb plate to form a first rotating pair;

[0014] The link rotating shaft is arranged perpendicular to the radial direction of the link body.

[0015] Further, a link fixing plate is arranged on the comb plate, and specifically includes:

[0016] A first plate, which is fixed on the first surface of the comb plate;

[0017] A second plate, which is fixed on the second surface of the comb plate adjacent to the first surface;

[0018] An arc connecting part, the arc connecting part is connected between the first plate and the second plate, and the center of the arc connecting part has an opening, the link rotating shaft is limited in the arc connecting part, and the first end of the link body passes through the opening of the arc connecting part and is vertically connected to the link rotating shaft.

[0019] Further, a groove is opened along the edge of the comb plate, and a notch is opened on the groove, and the notch is arranged perpendicular to the radial direction of the groove;

[0020] The link rotating shaft is placed in the groove of the comb plate;

[0021] The first end of the link body passes through the notch of the comb plate and is connected to the link rotating shaft.

[0022] Further, two oppositely arranged convex blocks are fixed on one side of the comb plate;

[0023] The first end of the connecting rod body has a cylindrical barrel, which is rotatably sleeved on the connecting rod rotating shaft;

[0024] The connecting rod rotating shaft is fixed between two bumps.

[0025] Furthermore, a rotating shaft connecting plate is fixedly connected to the first end of the actuating rotating shaft, and the top end of the rotating shaft connecting plate is rotatably connected to the second end of the actuating connecting rod, thereby forming a second rotating pair.

[0026] Furthermore, the actuating connecting rod further includes a connecting rod connecting plate, which is fixed to the second end of the connecting rod body. The top ends of the connecting rod connecting plate and the rotating shaft connecting plate are connected by a rotating pin to form a second rotating pair.

[0027] Furthermore, the first end of the actuating connecting rod is higher than the second end of the actuating connecting rod;

[0028] The top end of the rotating shaft connecting plate is lower than the first end of the actuating rotating shaft;

[0029] When the comb plate is reset from the abnormal displacement, the second rotating pair is reset together with the reset of the comb plate under the action of gravity.

[0030] Furthermore, the comb plate is supported by a comb plate seat;

[0031] The safety protection device further includes at least one limiting mechanism, and the limiting mechanism is fixed on the comb plate seat;

[0032] The limiting mechanism is provided with a first limiting hole for the actuating rotating shaft to pass through, and the movement of the actuating rotating shaft is restricted through the first limiting hole, so that the actuating rotating shaft can rotate around its own axis.

[0033] Furthermore, the comb plate is supported by a comb plate seat;

[0034] The safety protection device further includes a switch bracket, and the switch bracket is fixed on the comb plate seat;

[0035] The safety switch is fixed on the switch bracket.

[0036] Furthermore, the switch bracket is provided with a second limiting hole for the actuating rotating shaft to pass through, and the movement of the actuating rotating shaft is restricted through the second limiting hole, so that the actuating rotating shaft can rotate around its own axis.

[0037] Furthermore, the safety switch is a normally open contact switch, and the switch triggering mechanism is a switch striker plate;

[0038] The actuating rotating shaft rotates to make the switch striker plate approach the safety switch, thereby triggering the action of the safety switch.

[0039] Further, a switch travel limit plate is fixed on the switch hitting plate, and a receiving opening for receiving the end of the switch travel limit plate is provided on the switch bracket, thereby restricting the rotation range of the switch hitting plate to protect the safety switch.

[0040] Further, the safety switch is a normally closed switch, and the switch triggering mechanism is a cam structure;

[0041] In the initial state, the cam structure contacts the safety switch. When the action rotating shaft rotates to make the contact degree of the cam structure with the safety switch change from deep to shallow and reach the switch travel of the safety switch, the safety switch is triggered to act.

[0042] Further, the safety switch is a normally open switch, and the switch triggering mechanism is a cam structure;

[0043] When the action rotating shaft rotates to make the contact degree of the cam structure with the safety switch change from shallow to deep and reach the switch travel of the safety switch, the safety switch is triggered to act.

[0044] Further, the safety switch is a photoelectric switch, and the switch triggering mechanism is a shielding plate;

[0045] When the action rotating shaft rotates, it causes the shielding plate to enter or leave the detection area of the safety switch, thereby triggering the safety switch to act.

[0046] Further, the safety switch is an inductive switch, and the switch triggering mechanism is a metal plate;

[0047] When the action rotating shaft rotates, it causes the metal plate to enter or leave the induction area of the inductive switch, thereby triggering the safety switch to act.

[0048] The beneficial technical effects of the present invention are as follows: The present invention converts the abnormal upward or backward displacement of the comb plate into the rotation angle of the action rotating shaft, thereby realizing the triggering of the safety switch. Only one safety switch can be used to detect the displacement of the comb plate in multiple directions, and it can be applied to different specifications of escalators, such as escalators and moving walks, and even special-shaped escalators such as spiral escalators. The product has the advantages of low cost, wide applicability, and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 It is a structural diagram of a comb safety protection device for an escalator or a moving walk according to the present invention;

[0050] Figure 2-1 It is a structural diagram of a preferred embodiment of the action connecting rod of a comb safety protection device for an escalator or a moving walk according to the present invention;

[0051] Figure 2-2 It is a structural diagram of a preferred embodiment of the action connecting rod of a comb safety protection device for an escalator or a moving walk according to the present invention;

[0052] Figure 2-3 Structural diagram of a preferred embodiment of the connection between the link shaft and the comb plate of a comb safety protection device for an escalator or moving walk of the present invention;

[0053] Figure 2-4 Structural diagram of another preferred embodiment of the connection between the link shaft and the comb plate of a comb safety protection device for an escalator or moving walk of the present invention;

[0054] Figure 3-1 Structural diagram of a preferred embodiment of the action shaft of a comb safety protection device for an escalator or moving walk of the present invention;

[0055] Figure 3-2 Structural diagram of another preferred embodiment of the action shaft of a comb safety protection device for an escalator or moving walk of the present invention;

[0056] Figure 3-3 Structural diagram of another preferred embodiment of the switch trigger mechanism of a comb safety protection device for an escalator or moving walk of the present invention;

[0057] Figure 3-4 Structural diagram of another preferred embodiment of the switch trigger mechanism of a comb safety protection device for an escalator or moving walk of the present invention;

[0058] Figures 4-1 to 4-7 Schematic diagram of calculation parameters of a preferred embodiment of the displacement of the comb plate and the rotation angle of the switch trigger mechanism of a comb safety protection device for an escalator or moving walk of the present invention;

[0059] Figure 5 Schematic diagram of the installation of a comb safety protection device for an escalator or moving walk of the present invention on a spiral escalator.

[0060] Wherein, 1 - action link; 2 - action shaft; 3 - safety switch; 4 - switch bracket; 5 - rotating pin; 6 - link fixing plate; 7 - comb plate; 8 - comb plate seat; 9 - limiting mechanism; 11 - link shaft; 12 - link body; 13 - link connecting plate; 21 - shaft body; 22 - switch trigger mechanism; 23 - switch stroke limiting plate; 24 - shaft connecting plate; 25 - receiving opening; 26 - limiting block; 61 - first plate; 62 - second plate; 63 - arc connecting part; 64 - opening; 70 - groove; 71 - convex block; 72 - notch. Specific embodiments

[0061] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0062] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0063] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not limited to the present invention.

[0064] See Figure 1 -4, the present invention provides a comb-tooth safety protection device, which is applied to an automatic elevator device. The automatic elevator device is an escalator or a moving walkway; characterized in that it includes:

[0065] An action link (1), the first end of the action link (1) is connected to the comb plate (7) of the automatic elevator device to form a first rotating pair;

[0066] An action rotating shaft (2), the first end of the action rotating shaft (2) is connected to the second end of the action link (1) to form a second rotating pair. A switch trigger mechanism (22) is formed on the action rotating shaft (2), and the switch trigger mechanism (22) is arranged near the safety switch (3) of the automatic elevator device;

[0067] When the comb plate (7) has an abnormal displacement, the action rotating shaft (2) is driven to rotate through the first rotating pair and the second rotating pair, and the switch trigger mechanism (22) contacts the safety switch (3) to trigger the action of the safety switch (3) to stop the operation of the automatic elevator device.

[0068] See Figure 1 And Figure 2-1 , further, the action link (1) includes:

[0069] A link body (12);

[0070] A link rotating shaft (11), fixed to the first end of the link body (12) and fixed to the comb plate (7) to form a first rotating pair;

[0071] The link rotating shaft (11) is arranged perpendicular to the radial direction of the link body (12).

[0072] See Figure 1 , further, a link fixing plate (6) is arranged on the comb plate (7), and specifically includes:

[0073] The first plate (61) is fixed to the first surface of the comb plate (7);

[0074] The second plate (62) is fixed to the second surface of the comb plate (7) adjacent to the first surface;

[0075] The arc-shaped connecting part (63) is connected between the first plate (61) and the second plate (62), and the center of the arc-shaped connecting part (63) has an opening (64). The connecting rod rotating shaft (11) is defined within the arc-shaped connecting part (63), and the first end of the connecting rod body (12) passes through the opening (64) of the arc-shaped connecting part (63) and is perpendicularly connected to the connecting rod rotating shaft (11).

[0076] See Figure 2-2 , further, a groove (70) is formed along the edge of the comb plate (7), and a notch (72) is formed on the groove (70). The notch (72) is arranged perpendicular to the radial direction of the groove (70);

[0077] The connecting rod rotating shaft (11) is placed within the groove (70) of the comb plate (7);

[0078] The first end of the connecting rod body (12) passes through the notch (72) of the comb plate (7) and is connected to the connecting rod rotating shaft (11).

[0079] See Figure 2-3 , further, two oppositely arranged convex blocks (71) are fixed on one surface of the comb plate (7);

[0080] The first end of the connecting rod body (12) has a cylindrical barrel, and the cylindrical barrel is rotatably sleeved on the connecting rod rotating shaft (11);

[0081] The connecting rod rotating shaft (11) is fixed between the two convex blocks (71).

[0082] See Figure 2-1 , further, a rotating shaft connecting plate (24) is fixedly connected to the first end of the actuating rotating shaft (2). The top end of the rotating shaft connecting plate (24) is rotatably connected to the second end of the actuating connecting rod (1), thereby forming a second rotating pair.

[0083] See Figure 2-2 , further, the actuating connecting rod (1) further includes a connecting rod connecting plate (13), which is fixed to the second end of the connecting rod body (12). The top ends of the connecting rod connecting plate (13) and the rotating shaft connecting plate (24) are connected by a rotating pin (5) to form a second rotating pair.

[0084] Further, the first end of the actuating connecting rod (1) is higher than the second end of the actuating connecting rod (1);

[0085] The top end of the rotating shaft connecting plate (24) is lower than the first end of the moving rotating shaft (2);

[0086] After the comb plate (7) is reset from the abnormal displacement, the second rotating pair is reset together with the reset of the comb plate (7) under the action of gravity.

[0087] Furthermore, the comb plate (7) is supported by a comb plate seat (8);

[0088] The safety protection device further includes at least one limiting mechanism (9), and the limiting mechanism (9) is fixed on the comb plate seat (8);

[0089] The limiting mechanism (9) is provided with a first limiting hole for the moving rotating shaft (2) to pass through, and the movement of the moving rotating shaft (2) is restricted through the first limiting hole, so that the moving rotating shaft (2) can rotate around its own axis.

[0090] Furthermore, the moving rotating shaft (2) is parallel to the front end of the comb plate (7).

[0091] Furthermore, the comb plate (7) is supported by a comb plate seat (8);

[0092] The safety protection device further includes a switch bracket (4), and the switch bracket (4) is fixed on the comb plate seat (8);

[0093] The safety switch (3) is fixed on the switch bracket (4).

[0094] Furthermore, the switch bracket (4) is provided with a second limiting hole for the moving rotating shaft (2) to pass through, and the movement of the moving rotating shaft (2) is restricted through the second limiting hole, so that the moving rotating shaft (2) can rotate around its own axis.

[0095] Furthermore, the safety switch (3) is a normally open contact switch, and the switch trigger mechanism (22) is a switch striker plate;

[0096] The moving rotating shaft (2) rotates to make the switch striker plate approach the safety switch (3), thereby triggering the action of the safety switch (3).

[0097] Furthermore, a switch stroke limiting plate is fixed on the switch striker plate, and the switch bracket (4) is provided with a receiving opening (25) for receiving the end of the switch stroke limiting plate (23), thereby restricting the rotation range of the switch striker plate to protect the safety switch (3).

[0098] Specifically, the switch hitting plate is arranged below the safety switch (3), and the switch stroke limiting plate (23) is fixed below the switch hitting plate. When the comb plate (7) moves upward or backward, the action connecting rod (1) drives the action rotating shaft (2) to rotate, and the switch hitting plate also rotates accordingly, contacts the safety switch (3), and triggers the safety switch (3) to open. Due to the existence of the accommodation opening (25), the rotation range of the switch hitting plate is limited, so that it can avoid over-contacting the safety switch (3) and damaging the safety switch (3), thereby protecting the safety switch. Further, a limiting block (26) is also arranged on the switch bracket (4), which is arranged below the switch hitting plate to further limit the movement range of the switch hitting plate.

[0099] See Figure 3-3 and Figure 3-4 , further, the safety switch (3) is a normally closed switch, and the switch triggering mechanism (22) is a cam structure;

[0100] In the initial state, the cam structure contacts the safety switch (3). When the action rotating shaft (2) rotates to make the contact degree of the cam structure with the safety switch (3) change from deep to shallow and reach the switch stroke of the safety switch (3), the safety switch (3) is triggered to act.

[0101] See Figure 3-3 and Figure 3-4 , further, the safety switch (3) is a normally open switch, and the switch triggering mechanism (22) is a cam structure;

[0102] When the action rotating shaft (2) rotates to make the contact degree of the cam structure with the safety switch (3) change from shallow to deep and reach the switch stroke of the safety switch (3), the safety switch (3) is triggered to act.

[0103] As a normally open switch, when the contact of the cam structure with the safety switch (3) gradually deepens to a certain degree, i.e., the switch stroke, the safety switch (3) acts to control the escalator or moving walk to stop.

[0104] As a normally closed switch, when the contact of the cam structure with the safety switch (3) gradually becomes shallower to a certain degree, i.e., the switch stroke, the safety switch (3) acts to control the escalator or moving walk to stop.

[0105] Specifically, the cam structure is disc-shaped, and its axis is not coincident with the action rotating shaft (2), and it makes eccentric rotation along with the action rotating shaft (2). Specifically, as Figure 3-4 shown, the cam structure has a pointed end. As a normally open switch, when the pointed end contacts the safety switch (3), the safety switch (3) acts to control the escalator or moving walk to stop. As a normally closed switch, when the pointed end is away from the safety switch (3), the safety switch (3) acts to control the escalator or moving walk to stop.

[0106] Specifically, as another preferred embodiment of the present invention, the switch trigger mechanism (22) is a disc structure, and the axis line of the disc structure is coaxial with the rotation axis of the action rotating shaft (2). A sector-shaped opening is provided on the disc structure. The safety switch (3) is a normally open switch, and the switch contacts are within the sector-shaped opening. When the action link (1) drives the action rotating shaft (2) to rotate, the disc structure starts to rotate, the switch contacts leave the sector-shaped opening, and under the pressure of the disc structure, they move upward by a certain distance to cause the safety switch (3) to act, controlling the escalator or moving walk to stop.

[0107] Further, as another preferred embodiment of the present invention, the safety switch (3) is a photoelectric switch, and the switch trigger mechanism (22) is a shielding plate;

[0108] When the action rotating shaft (2) rotates, it causes the shielding plate to enter or leave the detection area of the safety switch (3), thereby triggering the safety switch (3) to act.

[0109] Further, as another preferred embodiment of the present invention, the safety switch (3) is an inductive switch, and the switch trigger mechanism (22) is a metal plate;

[0110] When the action rotating shaft (2) rotates, it causes the metal plate to enter or leave the induction area of the inductive switch, thereby triggering the safety switch (3) to act.

[0111] As a specific embodiment of the present invention, refer to Figures 4-1 to 4-7 , when the comb plate (7) moves upward by S1 or backward by S2, through the first rotating pair and the second rotating pair, the action link (1) and the action rotating shaft (2) are linked, and the action rotating shaft (2) rotates counterclockwise, so that the switch trigger mechanism (22) contacts the switch contacts of the safety switch (3), pushing the switch contacts to move upward by the distance of the switch stroke, thereby triggering the action of the switch and causing the escalator or moving walk to stop. That is, when the front end of the comb plate (7) is stuck by foreign objects and undergoes an upward or backward displacement (upward displacement S1, backward displacement S2), the action rotating shaft (2) is driven by the action link (1) to rotate by an angle of θ, and the switch hitting plate (switch trigger mechanism (22)) rotates upward by the same angle. When the displacement at the position of the switch contacts reaches S3, the safety switch (3) can be triggered to act, realizing safe stop of the ladder.

[0112] In the present invention, by modifying the length ratio of the rotating shaft connecting plate (6)(24) to the actuating link (1), the amplification ratio of the displacement of the actuating mechanism to the comb plate (7) can be controlled. For different escalators or moving walks, by simply changing the length L1 of the link (1) and the length L2 of the rotating shaft connecting plate (6)(24), the rotation angle θ1 or θ2 of the switch striking plate can be obtained. Before calculation, it is necessary to first confirm the shaft positions of the first and second rotating pairs according to the escalator structure. The rotating shaft of the first rotating pair can be considered as the rotation axis of the link rotating shaft (11), and the rotation axis of the second rotating pair can be considered as the rotation axis of the actuating rotating shaft (2). Determine the relative distances LA, LB, and the spacing L between them, as shown in Figure 4-2 . In the second step, according to the displacement (S1 or S2) at the end of the link, calculate the spacing LC (corresponding to S1) or LD (corresponding to S2) between the first and second rotating pairs after displacement. Calculate the angles θA or θB after displacement according to the cosine theorem. The specific formulas are as follows.

[0113]

[0114]

[0115]

[0116] θ A =θ A2 -θ A1 (Formula 4)

[0117]

[0118]

[0119] θ B =θ B2 +θ B1 (Formula 7)

[0120] The difference between the angles θA or θB and the original angle θ is the rotation angle θ1 or θ2 of the switch striking plate (that is, the rotation angle of the actuating rotating shaft (2)). The formulas are as follows:

[0121] θ1 = θ - θ A (Formula 8);

[0122] θ2 = θ - θ B (Formula 9);

[0123] Calculate the ratio between the length L2 of the rotating shaft connecting plate (6) (24) and the effective length L3 of the switch hitting plate from the rotation angle θ1 or θ2 of the switch hitting plate (i.e., the rotation angle of the moving shaft (2)), determine the switch position and the contact travel. The effective length L3 can be considered as the distance between the rotation axis of the moving shaft (2) and the point on the switch hitting plate where the switch hitting plate can move the switch contact of the safety switch (3) upward by a distance S3). The position and size of the switch travel limiting plate (23) need to be calculated and confirmed by back-calculation through the maximum travel Smax of the switch contact. See Figure 4 for details.

[0124] See Figures 4-1 to 4-7 The parameter design for the switch hitting plate, which is a switch triggering mechanism, is given. For some of the switches mentioned in the previous part of the present invention, the calculation formulas (1)-(9) are also applicable. The main idea is to control the amplification ratio of the displacement of the comb plate (7) by the action mechanism by modifying the length ratio of the rotating shaft connecting plate (6) (24) and the action link (1). The lengths of the rotating shaft connecting plate (6) (24) and the action link (1) are used as design parameters to convert the displacement of the comb plate (7) into the rotation angle θ1 or θ2 of the moving shaft (2), the upward displacement S1, and the backward displacement S2. Considering comprehensively the length parameters of the rotating shaft connecting plate (6) (24), the action link (1), the relevant dimensional parameters of a specific escalator or moving walkway, as well as the type of safety switch (which may include the switch travel) and the type of switch triggering mechanism, the specific parameter values in the safety protection device required for the escalator or moving walkway can be obtained.

[0125] The comb plate safety protection device disclosed in the present invention mainly converts the displacements of the escalator comb plate in several different directions into the rotation of the switch triggering mechanism (22) in the same direction by rotation, and can use only one safety switch (3) to detect the displacements of the comb plate in several directions. Through design and calculation, escalators of different specifications and sizes can accurately control the displacement travel of the switch trigger by changing the length ratio of the action link (1) and the rotating shaft connecting plate (6) (24), which is convenient and fast. At the same time, the rotating pair between the moving shaft (2) and the action link (1) is located below, and the gravity can be used to assist the rotating mechanism to accurately reset, significantly improving the reliability of the switch.

[0126] See Figure 5 , the safety protection device of the present invention can also be used for spiral escalators. Safety protection devices are installed on both the inner and outer sides of the spiral escalator, effectively improving safety detection, with a simple structure, low cost, and small occupied space.

[0127] The above are only the preferred embodiments of the present invention, and do not limit the implementation manners and protection scope of the present invention. For those skilled in the art, it should be realized that all the solutions obtained by equivalent substitution and obvious changes made by using the specification and illustrated content of the present invention should be included in the protection scope of the present invention.

Claims

1. A comb-tooth safety protection device is applied to an automatic elevator device, and the automatic elevator device is an escalator or a moving walkway; characterized in that, Comprising: An actuating link, the first end of the actuating link being connected to the comb plate of the escalator equipment to form a first rotating pair; An actuating rotating shaft, the first end of the actuating rotating shaft being connected to the second end of the actuating link to form a second rotating pair, a switch triggering mechanism being formed on the actuating rotating shaft, and the switch triggering mechanism being arranged near a safety switch of the escalator equipment; When the comb plate undergoes abnormal displacement, the actuating rotating shaft is driven to rotate through the first rotating pair and the second rotating pair, and the switch triggering mechanism contacts the safety switch so as to trigger the safety switch to act and realize the stop of the escalator equipment; The actuating link includes: A link body; A link rotating shaft, fixed to the first end of the link body and fixed to the comb plate, constituting the first rotating pair; The link rotating shaft is arranged perpendicular to the radial direction of the link body; A rotating shaft connecting plate is fixedly connected to the first end of the actuating rotating shaft, and the top end of the rotating shaft connecting plate is rotatably connected to the second end of the actuating link, thereby forming the second rotating pair; The actuating rotating shaft can rotate around its own axis.

2. The comb tooth safety protection device according to claim 1, wherein A link fixing plate is arranged on the comb plate, and specifically includes: A first plate, fixed to the first surface of the comb plate; A second plate, fixed to the second surface of the comb plate adjacent to the first surface; An arc connecting portion, the arc connecting portion being connected between the first plate and the second plate, and the center of the arc connecting portion having an opening, the link rotating shaft being defined within the arc connecting portion, and the first end of the link body passing through the opening of the arc connecting portion and being perpendicularly connected to the link rotating shaft.

3. The comb tooth safety protection device according to claim 1, characterized in that, A groove is formed along the edge of the comb plate, and a notch is formed in the groove, and the notch is arranged perpendicular to the radial direction of the groove; The link rotating shaft is placed in the groove of the comb plate; The first end of the link body passes through the notch of the comb plate and is connected to the link rotating shaft.

4. A comb tooth safety protection device according to claim 1, characterized in that, Two oppositely arranged convex blocks are fixed on one surface of the comb plate; The first end of the link body has a cylindrical barrel, and the cylindrical barrel is rotatably sleeved on the link rotating shaft; The link rotating shaft is fixed between the two convex blocks.

5. The comb tooth safety protection device according to claim 1, characterized in that, The actuating link further includes a link connecting plate, fixed to the second end of the link body, and the top ends of the link connecting plate and the rotating shaft connecting plate are connected by a rotating pin to form the second rotating pair.

6. The comb tooth safety protection device according to claim 1, wherein, The first end of the actuating link is higher than the second end of the actuating link; The top end of the rotating shaft connecting plate is lower than the first end of the actuating rotating shaft; When the comb plate is reset from the abnormal displacement, the second rotating pair is reset together with the reset of the comb plate under the action of gravity.

7. The comb tooth safety protection device according to claim 1, characterized in that, The comb plate is supported by a comb plate seat; The safety protection device further includes at least one limiting mechanism, and the limiting mechanism is fixed on the comb plate seat; A first limiting hole for the actuating rotating shaft to pass through is arranged on the limiting mechanism, and the movement of the actuating rotating shaft is restricted through the first limiting hole, so that the actuating rotating shaft can rotate around its own axis.

8. The comb tooth safety protection device according to claim 1, characterized in that, The comb plate is supported by a comb plate seat; The safety protection device further includes a switch bracket which is fixed on the comb plate seat; The safety switch is fixed on the switch bracket.

9. The comb tooth safety protection device according to claim 8, characterized in that, The switch bracket is provided with a second limit hole for the action rotating shaft to pass through, and the movement of the action rotating shaft is restricted through the second limit hole, so that the action rotating shaft can rotate around its own axis.

10. A comb tooth safety protection device according to claim 8, characterized in that, The safety switch is a normally open contact switch, and the switch triggering mechanism is a switch striker plate; The rotation of the action rotating shaft causes the switch striker plate to approach the safety switch, thereby triggering the action of the safety switch.

11. A comb tooth safety protection device according to claim 10, characterized in that, A switch stroke limiting plate is fixed on the switch striker plate, and a receiving opening for receiving the end of the switch stroke limiting plate is provided on the switch bracket, so as to limit the rotation range of the switch striker plate to protect the safety switch.

12. A comb tooth safety protection device according to claim 1, characterized in that, The safety switch is a normally closed switch, and the switch triggering mechanism is a cam structure; In the initial state, the cam structure contacts the safety switch. When the rotation of the action rotating shaft causes the contact degree of the cam structure with the safety switch to change from deep to shallow and reach the switch stroke of the safety switch, the action of the safety switch is triggered.

13. The comb tooth safety protection device according to claim 1, wherein, The safety switch is a normally open switch, and the switch triggering mechanism is a cam structure; When the rotation of the action rotating shaft causes the contact degree of the cam structure with the safety switch to change from shallow to deep and reach the switch stroke of the safety switch, the action of the safety switch is triggered.

14. A comb tooth safety protection device according to claim 1, characterized in that, The safety switch is a photoelectric switch, and the switch triggering mechanism is a shielding plate; When the action rotating shaft rotates, it causes the shielding plate to enter or leave the detection area of the safety switch, thereby triggering the action of the safety switch.

15. A comb tooth safety protection device as claimed in claim 1, wherein, The safety switch is an inductive switch, and the switch triggering mechanism is a metal plate; When the action rotating shaft rotates, it causes the metal plate to enter or leave the induction area of the inductive switch, thereby triggering the action of the safety switch.

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