Automatic bolt anti-falling device of boarding ladder

Abstract

The utility model relates to the technical field of marine safety, in particular to an automatic bolt anti-falling device of a boarding ladder, which comprises a lifting track and a lifting platform positioned on the inner side of the lifting track, two pulley bases are fixedly mounted at the upper end of the lifting platform, and platform pulleys are mounted in the pulley bases through pulley fixing plates. According to the automatic bolt anti-falling device of the boarding ladder, the problem that after a steel wire rope of the boarding ladder is broken, a lifting platform of the boarding ladder falls to the bottommost layer to threaten the safety of personnel can be solved; the device adopts a mechanical reset structure and is triggered by the stress condition of the platform, so that the reliability is high, and the situation that the safety device is not triggered due to forgetting of personnel or electrical failure is avoided; the device is simple in structure and high in rigidity. Damage caused by long-time use is avoided; the device adopts a modular design, and is convenient to maintain and replace quickly after being damaged due to accidents.

Description

Technical Field

[0001] The utility model relates to the technical field of marine safety, in particular to an automatic bolt anti-falling device for a boarding ladder. Background Technique

[0002] The boarding ladder realizes the lifting of the platform by a hydraulic winch pulling a steel wire rope, and the steel wire rope pulling the lifting platform. During the use process, due to friction, fatigue, impact, etc., the steel wire rope also has the risk of breaking. The existing boarding ladder has no special safety mechanism, resulting in the inability to automatically lock in case of breakage, and the safety is very limited. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is that the steel wire rope of the existing boarding ladder has the risk of breaking due to friction, fatigue, impact, etc., and the safety is very limited.

[0004] The technical solution adopted by the utility model to solve its technical problems is: an automatic bolt anti-falling device for a boarding ladder, including a lifting track and a lifting platform located inside the lifting track. Two pulley bases are fixedly installed at the upper end of the lifting platform. Platform pulleys are installed inside the pulley bases through pulley fixing plates. A first automatic bolt and a second automatic bolt are respectively installed on both sides of the lifting platform. A plurality of track slots are opened on the inner side surface of the lifting track, and an elastic anti-falling mechanism for connecting the platform pulley with the first automatic bolt and the platform pulley with the second automatic bolt is arranged inside the lifting platform.

[0005] The elastic anti-falling mechanism includes a connecting plate, a compression spring, a bolt steel wire rope and a reversing pulley group arranged inside the lifting platform. The platform pulley is inserted into the lifting platform through a bottom connecting rod and connected with the connecting plate.

[0006] The compression spring is sleeved outside the bottom connecting rod and arranged between the inner top surface of the lifting platform and the upper surface of the connecting plate.

[0007] Both the first automatic bolt and the second automatic bolt are composed of a bolt base fixed on the side wall of the lifting platform, a bolt slidably inserted into the bolt base, and a bolt compression spring sleeved outside the bolt.

[0008] The connecting plate is respectively connected with the ends of the first automatic bolt and the second automatic bolt at adjacent positions through the bolt steel wire rope.

[0009] The bolt base adopts a split structure design and is fixed on the side wall of the lifting platform through bolt combination.

[0010] The beneficial effect of the utility model is:

[0011] (1) The automatic bolt anti-falling device for a boarding ladder of the present utility model can solve the problem of the threat to personnel safety caused by the falling of the lifting platform of the boarding ladder to the bottom layer after the steel wire rope of the boarding ladder breaks;

[0012] (2) This device adopts a mechanical reset structure, which is triggered by the force condition of the platform, has strong reliability, and avoids the situation where the safety device is not triggered due to personnel forgetting or electrical faults;

[0013] (3) This device has a simple structure and strong rigidity. It will not be damaged due to long-term use;

[0014] (4) This device adopts a modular design, which is convenient for quick repair and replacement in case of accidental damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 FIG. is a schematic structural diagram of the present utility model.

[0017] Figure 2 FIG. is an exploded schematic diagram of the structure of the elastic anti-falling mechanism in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will now be further described in detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present utility model in a schematic manner, and therefore only show the components related to the present utility model.

[0019] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0020] Figure 1 and Figure 2 As shown in FIG., an automatic bolt anti-falling device for a boarding ladder includes a lifting track 1 and a lifting platform 2 located inside the lifting track 1. Two pulley bases 3 are fixedly installed at the upper end of the lifting platform 2. Platform pulleys 4 are installed inside the pulley bases 3 through pulley fixing plates. A first automatic bolt 5 and a second automatic bolt 6 are respectively installed on both sides of the lifting platform 2. Two track slots 7 are opened on the inner side surface of the lifting track 1. An elastic anti-falling mechanism for connecting the platform pulley 4 with the first automatic bolt 5 and the platform pulley with the second automatic bolt 6 is arranged inside the lifting platform 2.

[0021] The elastic anti-falling mechanism includes a connecting plate 10, a compression spring 11, a bolt wire rope 12, and a reversing pulley set 13 disposed inside the lifting platform 2. The platform pulley 4 is inserted into the lifting platform 2 through a bottom connecting rod 14 and connected to the connecting plate 10.

[0022] Both sides of the pulley base 3 are provided with long hinge holes. After the pin shaft of the platform pulley 4 is installed, the position of the pin shaft in the long hinge hole can be determined by the dynamic balance of the elastic force of the compression spring 11 and the tensile force received by the platform pulley 4.

[0023] To cooperate with elastic control, the compression spring 11 is sleeved around the bottom connecting rod 14 and disposed between the inner top surface of the lifting platform 2 and the upper surface of the connecting plate 10.

[0024] To integrate horizontal telescopic adjustment, both the first automatic bolt 5 and the second automatic bolt 6 are composed of a bolt base 561 fixed on the side wall of the lifting platform 2, a bolt 562 slidably inserted into the bolt base 561, and a bolt compression spring 563 sleeved outside the bolt 562.

[0025] To cooperate with tensile control, the connecting plate 10 is connected to the ends of the first automatic bolt 5 and the second automatic bolt 6 at adjacent positions through the bolt wire rope 12.

[0026] To facilitate modular loading and unloading, the bolt base 561 adopts a split structure design and is fixed on the side wall of the lifting platform 2 through bolt combinations.

[0027] When the lifting component of the boarding ladder operates normally, the platform pulley 4 at the top of the lifting platform 2 is subjected to an upward force under the influence of the winch wire rope, driving the bolt wire rope 12 of the elastic anti-falling mechanism to tighten upward. The first automatic bolt 5 and the second automatic bolt 6 are in the retracted state. At this time, the lifting platform 2 can rise and fall freely; when the lifting platform 2 is about to fall, when the tensile force of the winch wire rope on the platform pulley 4 is insufficient, the elastic force of the bolt compression springs 563 of the first automatic bolt 5 and the second automatic bolt 6 is greater than the tensile force of the bolt wire rope 12. The first automatic bolt 5 and the second automatic bolt 6 extend and reset outward, and are inserted into the track slots 7 on the inner side surface of the lifting track 1, and the lifting platform 2 is braked.

[0028] Specific process:

[0029] 1. During normal operation, the platform pulley 4 at the top of the lifting platform 2 is subjected to an upward tensile force from the wire rope.

[0030] 2. After the bolt wire rope 12 is tightened, it moves upward with the platform pulley 4.

[0031] 3. The first automatic bolt 5 and the second automatic bolt 6 are retracted under the action of the bolt wire rope 12. At this time, the lifting platform 2 can move freely up and down under the pulling of the winch wire rope;

[0032] 4. When the lifting platform 2 is about to fall due to insufficient force, the latch wire rope 12 retracts, and the first automatic latch 5 and the second automatic latch 6 reset. During the falling process of the lifting platform 2, the first automatic latch 5 and the second automatic latch 6 are inserted into the track slots 7 on the inner side of the lifting track 1 to complete braking;

[0033] 5. When the winch wire rope is tightened and the lifting platform 2 is under normal force, the first automatic latch 5 and the second automatic latch 6 are retracted from the track slots 7 on the inner side of the lifting track 1. At this time, the lifting platform 2 can freely lift and lower.

[0034] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An automatic latch anti-falling device for a boarding ladder, comprising a lifting track (1) and a lifting platform (2) located inside the lifting track (1), characterized in that: Two pulley bases (3) are fixedly installed on the upper end of the lifting platform (2), and platform pulleys (4) are installed inside the pulley bases (3) through pulley fixing plates. A first automatic latch (5) and a second automatic latch (6) are respectively installed on both sides of the lifting platform (2). A plurality of track slots (7) are opened on the inner side of the lifting track (1), and an elastic anti-falling mechanism for connecting the platform pulley (4) and the first automatic latch (5) and the platform pulley (4) and the second automatic latch (6) is arranged inside the lifting platform (2).

2. The automatic latch anti-falling device for a boarding ladder according to claim 1 is characterized in that: The elastic anti-fall mechanism comprises a connecting plate (10), a compression spring (11), a latch wire rope (12) and a reversing pulley block (13) arranged inside the lifting platform (2); the platform pulley (4) is inserted into the lifting platform (2) through a bottom connecting rod (14) and connected to the connecting plate (10).

3. The automatic latch anti-falling device for a boarding ladder according to claim 2, characterized in that: The compression spring (11) is sleeved on the periphery of the bottom connecting rod (14) and is arranged between the inner top surface of the lifting platform (2) and the upper surface of the connecting plate (10).

4. The automatic latch anti-falling device for a boarding ladder according to claim 1, characterized in that: The first automatic latch (5) and the second automatic latch (6) are both composed of a latch base (561) fixed on the side wall of the lifting platform (2), a latch (562) slidably inserted in the latch base (561), and a latch compression spring (563) sleeved on the outside of the latch (562).

5. The automatic latch anti-falling device for a boarding ladder according to claim 2, characterized in that: The connecting plate (10) is respectively connected to the ends of the first automatic latch (5) and the second automatic latch (6) at adjacent positions via latch steel wire ropes (12).

6. The automatic latch anti-falling device for a boarding ladder according to claim 4, characterized in that: The latch base (561) adopts a split structural design and is fixed to the side wall of the lifting platform (2) by means of a bolt assembly.

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