An adjustable anti-breaking device for lift cables

Abstract

The present invention provides an adjustable anti-breaking device for the lift cable, which includes a first U-shaped steel, a connecting piece, a triggering piece, and a contact sensor. One end of the first U-shaped steel is installed on the side wall of the lift, and the other end is suspended in the air and fixedly connected to the connecting piece. A rotating shaft is provided on the connecting piece, and a shaft hole corresponding to the rotating shaft is provided on the triggering piece. The opening of the first U-shaped steel faces the side, and the triggering piece is arranged inside the first U-shaped steel. One end of the triggering piece extends out of the first U-shaped steel and is provided with a supporting part, and the other end cooperates with the contact sensor. An elastic limiting element is arranged at the end of the triggering piece close to the sensor, and the elastic limiting element is connected to the side wall of the first U-shaped steel to provide a downward force for the triggering piece. For the adjustable anti-breaking device for the lift cable of the present invention, when the cable is stuck at both ends, the cable will press the supporting part and rotate the triggering piece, thereby triggering the contact sensor to cut off the power supply, protecting the cable, with a reliable structure and ensuring the safety of life and property during production.

Description

Technical Field

[0001] The invention belongs to the field of cable anti-breakage, and in particular relates to an adjustable anti-breakage device for a lift cable. Background Art

[0002] A construction lift is a construction machinery for carrying people and goods that is often used in construction. It is usually used in cooperation with a tower crane on a construction site. The driving force of the construction lift comes from a motor reducer, and the motor reducer is controlled by an electric control box. The cable of the electric control box is suspended in the air. During the operation of the construction lift, the cable is sometimes clamped, which will cause damage to the cable. In severe cases, the cable will be pulled off, resulting in a power outage and the construction lift being suspended in mid-air. Therefore, it is of great significance to research and invent an anti-pulling device for the cable of a construction lift. Summary of the Invention

[0003] In view of this, the present invention aims to provide an adjustable anti-breakage device for a lift cable, which triggers the contact sensor to cut off the power by the rotation of the trigger member, protects the cable, prevents the cable from being pulled off, and ensures the safety of life and property in production.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] An adjustable anti-breakage device for a lift cable includes a U-shaped steel one, a connecting member, a trigger member, and a contact sensor. One end of the U-shaped steel one is installed on the side wall of the lift, and the other end is suspended in the air and fixedly connected to the connecting member. A rotating shaft is provided on the connecting member, and a shaft hole corresponding to the rotating shaft is provided on the trigger member. The opening of the U-shaped steel one faces the side, the trigger member is arranged inside the U-shaped steel one, one end of the trigger member extends out of the U-shaped steel one and is provided with a support portion, and the other end cooperates with the contact sensor. An elastic limiting element is arranged at one end of the trigger member close to the sensor, and the elastic limiting element is connected to the side wall of the U-shaped steel one to provide a downward force for the trigger member.

[0006] Further, the connecting member includes a semi-circular plate and a C-shaped steel. The C-shaped steel is sleeved on one end of the U-shaped steel one suspended in the air. The opening of the C-shaped steel is arranged opposite to the opening of the U-shaped steel one. The inner side of the web of the C-shaped steel is fixedly connected to the opening of the U-shaped steel one. The non-circular arc end of the semi-circular plate is fixedly connected to the end face of the web of the C-shaped steel away from the lift.

[0007] Further, a semi-circular plate is also fixedly connected to the end face of the web of the U-shaped steel corresponding to the end face of the web of the C-shaped steel. A circular hole for inserting a rotating shaft is vertically arranged in the middle of a pair of the semi-circular plates.

[0008] Further, the trigger member includes a U-shaped steel two with an opening facing forward. The U-shaped steel two is arranged inside the U-shaped steel one. A square plate two is fixedly connected to the end face of the U-shaped steel two away from the rotating shaft. The contact sensor contacts the square plate two to sense the signal.

[0009] Furthermore, the elastic limiting element includes a long bolt, a nut and a spring. Multiple pairs of bolt holes are correspondingly arranged at the lower side walls of the second U-shaped steel and the lower side wall of the first U-shaped steel at the end far from the rotating shaft. The long bolt passes upward through the bolt holes of the first U-shaped steel and the second U-shaped steel from the lower surface of the first U-shaped steel and is screwed with the nut. The spring is sleeved on the long bolt and is arranged between the upper surface of the bolt head and the lower surface of the first U-shaped steel.

[0010] Furthermore, the trigger passes through the connecting piece and a pair of trapezoidal plates are arranged in contact with the inner surface of the semi-circular plate at the rotating shaft. A rotating shaft hole is correspondingly arranged on each of the pair of trapezoidal plates for the rotating shaft. The right-angled side of the trapezoidal plate faces upward, and the short bottom side of the trapezoidal plate is fixedly connected to the second U-shaped steel. The outer side of the supporting part is an arc surface, and it is fixedly connected between the pair of trapezoidal plates and near the diagonal of the right-angled side and the long bottom side of the trapezoidal plate.

[0011] Furthermore, a fixing plate is arranged on the upper surface of the first U-shaped steel at the end far from the rotating shaft, and a cable pressing plate is arranged at a position corresponding to the upper part of the fixing plate. The fixing plate and the cable pressing plate are connected by bolts;

[0012] A pair of cable pressing plates are vertically and fixedly connected to one side of the long bottom edge of the trapezoidal plate, and the upper end surface of the cable pressing plate close to the trapezoidal plate is smoothly fixedly connected to the lower end of the supporting part;

[0013] Both the upper and lower sides of the C-shaped steel are semi-circular. The upper end of the opening of the C-shaped steel is fixedly connected to the upper side of the web of the first U-shaped steel close to it. The upper side of the C-shaped steel and the upper surface of the first U-shaped steel cooperate to form a semi-circular cylinder for passing the cable;

[0014] The upper ends of the two semi-circular plates are higher than the upper surface of the connection between the second U-shaped steel and the arc-shaped supporting part to limit the wire and cable from sliding out of both sides of the supporting part.

[0015] Furthermore, the cable pressing plate includes an arc-shaped plate and square connecting plates fixedly connected to both sides of the arc-shaped plate. The supporting part of the arc-shaped plate bulges outward and forms a space for avoiding the cable inside.

[0016] Furthermore, the first U-shaped steel is fixed on the side wall of the elevator through a mounting plate. The mounting plate is vertically and fixedly connected to the end of the first U-shaped steel far from the rotating shaft. The mounting plate is provided with a wire passing hole for the cable to pass through, and the wire passing hole is arranged above the first U-shaped steel.

[0017] Compared with the prior art, the adjustable elevator cable anti-breakage device of the present invention has the following advantages:

[0018] When the cables at both ends of the elevator cable anti-breakage device of the present invention are stuck, the cables will press the supporting part to rotate and trigger the contact sensor, thereby cutting off the power supply to protect the cables. The structure is stable and reliable, ensuring the safety of life and property during production. Description of the Drawings

[0019] The accompanying drawings, which form a part of this application, are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the upper side structure of an adjustable elevator cable anti-breaking device according to an embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of the structure of an adjustable elevator cable anti-breaking device according to an embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of the upper side structure of a trigger according to an embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of a trigger according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 1 - First U-shaped steel; 11 - Semi-cylindrical tube; 12 - Fixed plate; 2 - Connecting piece; 21 - Semi-circular plate; 22 - First square plate; 3 - Trigger; 31 - Second U-shaped steel; 32 - Second square plate; 33 - Trapezoidal plate; 331 - Rotating shaft hole; 4 - Contact sensor; 5 - Rotating shaft; 6 - Elastic limiting element; 61 - Long bolt; 62 - Nut; 63 - Spring; 7 - Support part; 8 - Cable pressing plate; 81 - Arc plate; 82 - Connecting plate; 9 - Mounting plate; 91 - Threading hole. Detailed implementation manners

[0026] To make the purpose, technical solutions and advantages of this application clearer and more understandable, the following further elaborates on this application in detail with reference to specific embodiments and the accompanying drawings.

[0027] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the embodiments of this application should have the ordinary meanings understood by those with ordinary skills in the field to which this application belongs. The "first", "second" and similar terms used in the embodiments of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] An adjustable anti-breaking device for a lift cable includes a first U-shaped steel 1, a connecting piece 2, a triggering piece 3, and a contact sensor 4. One end of the first U-shaped steel 1 is installed on the side wall of the lift, and the other end is suspended in the air and fixedly connected to the connecting piece 2. A rotating shaft 5 is provided on the connecting piece 2, and the triggering piece 3 is provided with a rotating shaft hole corresponding to the rotating shaft 5.

[0030] The opening of the first U-shaped steel 1 faces the side. The triggering piece 3 is arranged inside the first U-shaped steel 1. One end of the triggering piece 3 extends out of the first U-shaped steel 1 and is provided with a supporting part 7 for supporting the cable, and the other end cooperates with the contact sensor 4 arranged inside the first U-shaped steel 1.

[0031] An elastic limiting element 6 is arranged at one end of the triggering piece 3 close to the sensor, and the elastic limiting element 6 is connected to the side wall of the first U-shaped steel 1 to provide a downward force for the triggering piece 3.

[0032] As Figure 1 、 Figure 2 , the connecting piece 2 includes a semi-circular plate 21 and a C-shaped steel 22. The C-shaped steel 22 is sleeved on one end of the first U-shaped steel 1 suspended in the air. The opening of the C-shaped steel 22 is arranged opposite to the opening of the first U-shaped steel 1. The inner side of the web of the C-shaped steel is fixedly connected to the opening of the first U-shaped steel. The non-circular arc end of the semi-circular plate 21 is fixedly connected to the end face of the web of the C-shaped steel away from the lift.

[0033] As Figure 1 、 Figure 2 , a semi-circular plate 21 is also fixedly connected to the end face of the web of the U-shaped steel corresponding to the end face of the web of the C-shaped steel. A circular hole for inserting the rotating shaft 5 is vertically arranged in the middle of a pair of the semi-circular plates 21.

[0034] As Figure 1 、 Figure 2 , the triggering piece 3 includes a second U-shaped steel 31 with an opening facing forward. The second U-shaped steel 31 is arranged inside the first U-shaped steel 1. A square plate 32 is fixedly connected to the end face of the second U-shaped steel 31 away from the rotating shaft 5, and the contact sensor 4 contacts the square plate 32 to sense the signal.

[0035] When the square plate 32 rotates upward around the rotating shaft 5, it will touch the contact sensor 4, and the motor of the device can be stopped.

[0036] As Figure 1 、 Figure 2, the elastic limiting element 6 includes a long bolt 61, a nut 62 and a spring 63. Multiple pairs of bolt holes are correspondingly arranged at the lower side walls of the second U-shaped steel 31 and the first U-shaped steel 1 at the end far from the rotating shaft 5. The long bolt 61 passes upward through the bolt holes of the first U-shaped steel 1 and the second U-shaped steel 31 from the lower surface of the first U-shaped steel 1 and is screwed with the nut 62. The spring 63 is sleeved on the long bolt 61 and is arranged between the upper surface of the bolt head and the lower surface of the first U-shaped steel 1.

[0037] During normal movement, the force provided by the spring is relatively large, restricting the cable from pressing on the support portion 7 and driving the rotation of the trigger member, so it will not contact the contact sensor. When the abnormal cable is stuck, the cable will press on the support portion, rotate the rotating shaft, and the end of the U-shaped steel will trigger the sensor.

[0038] Such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , the trigger member 3 passes through the connecting member 2 and a pair of trapezoidal plates 33 are arranged in contact with the inner surface of the semi-circular plate at the rotating shaft 5. A rotating shaft hole 331 is correspondingly arranged on each of the pair of trapezoidal plates 33 for the rotating shaft 5. The right-angled sides of the trapezoidal plates 33 are arranged upward, and the short bottom sides of the trapezoidal plates 33 are fixedly connected to the second U-shaped steel 31. The outer side of the support portion 7 is an arc-shaped surface, which is fixedly connected between the pair of trapezoidal plates 33 and near the diagonal of the right-angled side and the long bottom side of the trapezoidal plates 33.

[0039] The arc-shaped surface of the support portion can effectively reduce the friction between the cable and the support portion and extend the service life of the cable.

[0040] Such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , a fixing plate 12 is arranged on the upper surface of the first U-shaped steel 1 at the end far from the rotating shaft 5, and a cable pressing plate 8 is arranged at a position corresponding to the upper part of the fixing plate. The fixing plate 12 and the cable pressing plate 8 are connected by bolts; the distance between the cable pressing plates can be adjusted by the connecting bolts.

[0041] A pair of cable pressing plates 8 are vertically and fixedly connected to one side of the long bottom edge of the trapezoidal plate 33, and the upper end surface of the cable pressing plate 8 close to the trapezoidal plate 33 is smoothly fixedly connected to the lower end of the support portion;

[0042] Both the upper and lower sides of the C-shaped steel 22 are semi-circular. The upper end of the opening of the C-shaped steel 22 is fixedly connected to the upper side of the web of the first U-shaped steel 1 close to it. The upper side of the C-shaped steel 22 and the upper surface of the first U-shaped steel 1 cooperate to form a semi-circular cylinder 11 for passing the cable;

[0043] The upper ends of the two semi-circular plates 21 are higher than the upper surface of the connection between the second U-shaped steel and the arc-shaped support portion 7 to limit the wire and cable from sliding out of both sides of the support portion 7.

[0044] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , the cable pressing plate 8 includes an arc-shaped plate 81 and square connecting plates 82 fixedly connected to both sides of the arc-shaped plate. The supporting part of the arc-shaped plate 81 bulges outward, and a space for avoiding the cable is formed inside.

[0045] As Figure 1 , Figure 2 , the first U-shaped steel 1 is fixed on the side wall of the elevator by the mounting plate 9. The mounting plate 9 is vertically fixedly connected to the end of the first U-shaped steel 1 away from the rotating shaft. The mounting plate 9 is provided with a wire passing hole 91 for the cable to pass through, and the wire passing hole 91 is arranged above the first U-shaped steel.

[0046] Working process:

[0047] One end of the cable is connected to the elevator car, passes through the wire passing hole on the mounting plate 9, the cable pressing plate and the semi-cylindrical barrel on the upper side of the first U-shaped steel, bypasses the supporting part 7, and passes through the cable pressing plate at the lower end of the supporting part 7, and finally is connected to the motor frame to wind and unwind the cable. When the motor rotates to wind the cable, it may be interfered by the scaffolding or other obstacles on the construction site, and the cable at the elevator car end is stuck. While the motor continues to rotate to wind the cable, the force of the cable pressing on the supporting part 7 will increase, so that it exceeds the limiting force of the spring in the limiting part, and the second U-shaped steel rotates upward around the rotating shaft 5, and the side surface of the second square plate touches the contact sensor, so that the motor stops rotating to protect the cable.

[0048] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-breaking device for a lift cable, characterized in that: It includes U-shaped steel one (1), a connecting piece (2), a triggering piece (3), and a contact sensor (4). One end of the U-shaped steel one (1) is installed on the side wall of the elevator, and the other end is suspended in the air and fixedly connected to the connecting piece (2). A rotating shaft (5) is provided on the connecting piece (2), and the triggering piece (3) is provided with a rotating shaft hole corresponding to the rotating shaft (5). The opening of the U-shaped steel one (1) faces the side. The triggering piece (3) is arranged inside the U-shaped steel one (1). One end of the triggering piece (3) extends out of the U-shaped steel one (1) and is provided with a supporting part (7) for supporting the cable, and the other end cooperates with the contact sensor (4) arranged inside the U-shaped steel one (1). An elastic limiting element (6) is arranged at one end of the triggering piece (3) close to the sensor. The elastic limiting element (6) is connected to the side wall of the U-shaped steel one (1) to provide a downward force for the triggering piece (3). The connecting piece (2) includes a semi-circular plate (21) and a C-shaped steel (22). The C-shaped steel (22) is sleeved on one end of the U-shaped steel one (1) suspended in the air. The opening of the C-shaped steel (22) is arranged opposite to the opening of the U-shaped steel one (1). The inner side of the web of the C-shaped steel is fixedly connected to the opening of the U-shaped steel one. The non-arc end of the semi-circular plate (21) is fixedly connected to the end face of the web of the C-shaped steel away from the elevator. A semi-circular plate (21) is also fixedly connected to the end face of the web of the U-shaped steel corresponding to the end face of the web of the C-shaped steel. Circular holes for inserting the rotating shaft (5) are vertically arranged in the middle of a pair of the semi-circular plates (21). The triggering piece (3) includes a U-shaped steel two (31) with an opening facing forward. The U-shaped steel two (31) is arranged inside the U-shaped steel one (1). A square plate two (32) is fixedly connected to the end face of the U-shaped steel two (31) away from the rotating shaft (5). The contact sensor (4) contacts the square plate two (32) to sense the signal. The elastic limiting element (6) includes a long bolt (61), a nut (62), and a spring (63). Multiple pairs of bolt holes are correspondingly arranged at the lower side walls of the U-shaped steel two (31) and the U-shaped steel one (1) at one end away from the rotating shaft (5). The long bolt (61) passes through the bolt holes of the U-shaped steel one (1) and the U-shaped steel two (31) upward from the lower surface of the U-shaped steel one (1) and is screwed with the nut (62). The spring (63) is sleeved on the long bolt (61) and is arranged between the upper surface of the bolt head and the lower surface of the U-shaped steel one (1). The triggering piece (3) passes through the connecting piece (2) and a pair of trapezoidal plates (33) are arranged in contact with the inner surface of the semi-circular plate at the rotating shaft (5). A rotating shaft hole (331) is correspondingly arranged on a pair of the trapezoidal plates (33) for the rotating shaft (5). The right-angle sides of the trapezoidal plates (33) face upward. The short bottom side of the trapezoidal plate (33) is fixedly connected to the U-shaped steel two (31). The outer side of the supporting part (7) is an arc-shaped surface, which is fixedly connected between a pair of trapezoidal plates (33) and close to the diagonal of the right-angle side and the long bottom side of the trapezoidal plate (33). On the upper surface of the end of the first U-shaped steel (1) far from the rotating shaft (5), a fixing plate (12) is provided. A cable pressing plate (8) is arranged at a position corresponding to the upper part of the fixing plate. The fixing plate (12) and the cable pressing plate (8) are connected by bolts. On one side of the long bottom edge of the trapezoidal plate (33), a pair of cable pressing plates (8) are vertically fixed. The upper end surface of the cable pressing plate (8) close to the trapezoidal plate (33) is smoothly fixed to the lower end of the supporting part. Both the upper and lower sides of the C-shaped steel (22) are semi-circular. The upper end of the opening of the C-shaped steel (22) is fixed to the upper side of the web of the first U-shaped steel (1) close to it. The upper side of the C-shaped steel (22) and the upper surface of the first U-shaped steel (1) cooperate to form a semi-cylindrical tube (11) for passing cable wires. The upper ends of the two semi-circular plates (21) are higher than the upper surface of the connection between the second U-shaped steel and the arc-shaped supporting part (7) to limit the cable wires from sliding out of both sides of the supporting part (7).

2. The anti-breaking device for a lift cable according to claim 1, characterized in that: The cable pressing plate (8) includes an arc-shaped plate (81) and square connecting plates (82) fixed on both sides of the arc-shaped plate. The supporting part of the arc-shaped plate (81) bulges outward to form a space for avoiding the cable inside.

3. The anti-breaking device for the lift cable according to claim 1, characterized in that: The first U-shaped steel (1) is fixed on the side wall of the elevator through a mounting plate (9). The mounting plate (9) is vertically fixed to the end of the first U-shaped steel (1) far from the rotating shaft. The mounting plate (9) is provided with a wire passing hole (91) for the cable to pass through. The wire passing hole (91) is arranged above the first U-shaped steel.

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