阅读说明：本技术 一种安全带爬梯锁定装置 (Safety belt cat ladder locking device ) 是由 马溢坚 蒋剑锋 章广琼 王松华 吴亢 于 2021-01-20 设计创作，主要内容包括：本发明涉及安全设备。目的是提供一种安全可靠的爬梯用的安全带爬梯锁定装置。技术方案是：一种安全带爬梯锁定装置,其特征在于：该装置包括锁扣装置以及连接锁扣装置的安全绳,所述锁扣装置包括锁体、夹紧机构和导向机构；所述锁体包括一端铰接在一起而另一端安装一锁杆的一对分锁体；所述锁杆的一端与其中一个分锁体铰接而另一端与另一个分锁体相抵靠,锁杆配套有复位弹簧；所述夹紧机构连接锁体,能够使一对分锁体打开或合拢；所述导向机构连接锁体,使锁体沿着梯子边杆的往上移动的同时,导向机构能够与梯子的横杆配合以防止锁体下坠。(The present invention relates to security devices. The purpose is to provide a safe and reliable safety belt ladder stand locking device for a ladder stand. The technical scheme is as follows: a safety belt ladder stand locking device is characterized in that: the device comprises a locking device and a safety rope connected with the locking device, wherein the locking device comprises a lock body, a clamping mechanism and a guide mechanism; the lock body comprises a pair of sub-lock bodies, one ends of which are hinged together, and the other ends of which are provided with a lock rod; one end of the lock rod is hinged with one of the sub-lock bodies, the other end of the lock rod is abutted against the other sub-lock body, and the lock rod is matched with a return spring; the clamping mechanism is connected with the lock body and can open or close the split lock bodies; the lock body is connected to guiding mechanism, and when making the lock body along the up-going removal of ladder limit pole, guiding mechanism can cooperate in order to prevent the lock body tenesmus with the horizontal pole of ladder.)

1. A safety belt ladder stand locking device is characterized in that: the device comprises a locking device (100) and a safety rope connected with the locking device, wherein the locking device comprises a lock body (10), a clamping mechanism (20) and a guide mechanism (30); the lock body comprises a pair of sub-lock bodies (11) with one ends hinged together and the other ends provided with a lock rod (12); one end of the lock rod is hinged with one of the sub-lock bodies, the other end of the lock rod is abutted against the other sub-lock body, and the lock rod is matched with a return spring; the clamping mechanism is connected with the lock body and can open or close the split lock bodies; the guide mechanism is connected with the lock body, so that the lock body can move upwards along a side rod (41) of the ladder (40), and meanwhile, the guide mechanism can be matched with a cross rod (42) of the ladder to prevent the lock body from falling.

2. The safety belt ladder locking apparatus of claim 1, wherein: the clamping mechanism (20) comprises a pair of clamping jaws (21) which are hinged on the outer side walls of the pair of split lock bodies (11) in a one-to-one mode; the tail ends of the pair of clamping jaws are connected through a threaded assembly, and the threaded assembly can expand or contract the tail ends of the pair of clamping jaws so that the front ends of the pair of clamping jaws can clamp a pair of split lock bodies and keep a distance between the split lock bodies to allow the cross rod to pass through.

3. The safety belt ladder locking apparatus of claim 2, wherein: the thread component comprises a thread cylinder (26) with positive and negative threads, a positive thread bolt (22) and a negative thread screw (29) which are respectively fixed at the tail ends of the two clamping jaws and are in thread fit with the two ends of the thread cylinder, and a plurality of locking nuts for locking the positive thread bolt, the negative thread screw and the thread cylinder.

4. The safety belt ladder locking apparatus of claim 1, wherein: each split lock body (11) includes an arc-shaped portion and a linear portion, and the guide mechanism (30) includes a pair of guide members (31) arranged side by side and mounted on the linear portions of the split lock bodies in a one-to-one manner.

5. The safety belt ladder locking apparatus of claim 4, wherein: each guide member (31) includes a fixed portion fixedly coupled to the linear portion of the sub-lock body (11), and a movable portion engaged with the fixed portion and capable of being elevated with respect to the fixed portion.

6. The safety belt ladder locking apparatus of claim 5, wherein: in the pair of split lock bodies, two arc-shaped parts are correspondingly arranged in an arc shape, and one ends of the two arc-shaped parts are hinged with each other to form a shape which is suitable for the cross section of the side rod of the ladder; the locking rod is installed at the lower end of the arc-shaped part.

Technical Field

The invention relates to safety equipment, in particular to a safety belt ladder stand locking device for a ladder stand.

Background

People climb the ladder and have the risk of falling. To avoid or reduce this risk, the prior art uses safety belts. One end of the safety belt is connected with a ladder climber, the other end of the safety belt is connected with a fixture at a high position or connected with a ladder, and the safety belt drags the body of a person when the ladder climber falls.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a safe and reliable safety belt ladder stand locking device for a ladder stand.

In order to solve the technical problems, the invention provides the following technical scheme: safety belt cat ladder locking device, its characterized in that: the device comprises a locking device and a safety rope connected with the locking device, wherein the locking device comprises a lock body, a clamping mechanism and a guide mechanism; the lock body comprises a pair of sub-lock bodies, one ends of which are hinged together, and the other ends of which are provided with a lock rod; one end of the lock rod is hinged with one of the sub-lock bodies, the other end of the lock rod is abutted against the other sub-lock body, and the lock rod is matched with a return spring; the clamping mechanism is connected with the lock body and can open or close the split lock bodies; the lock body is connected to guiding mechanism, and when making the lock body along the up-going removal of ladder limit pole, guiding mechanism can cooperate in order to prevent the lock body tenesmus with the horizontal pole of ladder.

The clamping mechanism comprises a pair of clamping jaws which are hinged on the outer side walls of the pair of split lock bodies in a one-to-one mode; the tail ends of the pair of clamping jaws are connected through a threaded assembly, and the threaded assembly can expand or contract the tail ends of the pair of clamping jaws so that the front ends of the pair of clamping jaws can clamp a pair of split lock bodies and keep a distance between the split lock bodies to allow the cross rod to pass through.

The thread component comprises a thread cylinder with positive and negative threads, a positive bolt and a negative screw which are respectively fixed at the tail ends of the two clamping jaws and are in thread fit with the two ends of the thread cylinder, and a plurality of locking nuts used for locking the positive bolt, the negative screw and the thread cylinder.

Each sub-lock body comprises an arc-shaped part and a linear part, the guide mechanism comprises a pair of guide members which are arranged in parallel, and the pair of guide members are arranged on the linear parts of the pair of sub-lock bodies in a one-to-one mode.

Each guide member comprises a fixed part fixedly connected with the linear part of the sub-lock body and a movable part matched with the fixed part and capable of lifting relative to the fixed part.

In the pair of split lock bodies, two arc-shaped parts are correspondingly arranged in an arc shape, and one ends of the two arc-shaped parts are hinged with each other to form a shape which is suitable for the cross section of the side rod of the ladder; the locking rod is installed at the lower end of the arc-shaped part.

The user opens the split lock bodies around the hinge shafts of the split lock bodies and closes the split lock bodies on the side rods of the ladder, the user operates the clamping mechanism, the clamping mechanism clamps the split lock bodies, and the split lock bodies cannot be separated from the side rods but can be lifted along the side rods. The guide mechanism is positioned on the inner side of the side rod, clamps the cross rod of the ladder and can lift relative to the cross rod. The safety belt ladder locking device is characterized in that one end of the safety belt ladder locking device is connected with a user, the other end of the safety belt ladder locking device is connected with the lock body, the user moves upwards along the ladder to drive the lock body to ascend along the side rod, and the length of the guide mechanism is equal to or larger than the distance between the two cross rods, so that the guide mechanism at least clamps one cross rod of the ladder, and the lock body cannot rotate around the side rod. In the ascending process of the lock body, the guide mechanism passes through the surface of each cross rod, and each cross rod acts on the lock rod to force the lock rod to swing downwards; after the lock rod passes through each cross rod, the lock rod is reset and pressed on a branch lock body under the action of the reset spring. If the user falls, the lock rod can abut against the corresponding cross rod to enable the locking device to be in a locking state and cannot descend along the side rod, and the user is prevented from falling.

The invention has the beneficial effects that: the clamping mechanism can control the opening of the lock body, so that the lock body can be matched with the side rods of ladders with different sizes. The guide mechanism can enable the whole locking device to rise along the side rod of the ladder in a straight line without deflection, so that the safety and the reliability in use are ensured, and favorable conditions are provided for a user to climb the ladder smoothly.

Drawings

The invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of a locking device of the present invention.

Fig. 2 is a perspective view of the locking device at another angle (viewed from below in fig. 1).

Fig. 3 is a schematic view of the connection between the screw assembly and the clamping jaw according to the present invention.

Fig. 4 is a schematic sectional structure view of a-a in fig. 3.

Fig. 5 is a schematic view of the usage state of the present invention.

The symbols in the drawings illustrate that:

100. a locking device;

10. a lock body; 11. a lock body is separated; 12. a lock lever; 13. hinging a shaft; 14. a lug; 15. a hinge ear; 16. a connecting ear for connecting a safety belt;

20. a clamping mechanism; 21. a clamping jaw; 210. a strip-shaped groove; 22. an orthodontic bolt; 23. a first locking nut; 24. a nut; 25. a bolt head; 26. a threaded barrel; 27. a second locking nut, 29, a reverse threaded rod;

30. a guide mechanism; 31. a guide member;

40. a ladder; 41. a side bar; 42. a cross bar.

Detailed Description

The following further description is made with reference to the embodiments shown in the drawings.

The safety belt ladder locking device shown in fig. 1 and 2 comprises a locking device 100 and a safety rope (for the sake of clarity, omitted in the figures) connected with the locking device; the lock catch device comprises a lock body 10, a clamping mechanism 20 and a guide mechanism 30, wherein the lock body comprises a pair of sub lock bodies 11, one ends of the sub lock bodies are hinged together (the arc parts of the two sub lock bodies are correspondingly arranged in an arc shape, and the shape which is suitable for the cross section of a side rod of a ladder is formed after the one ends of the two sub lock bodies are hinged), and a lock rod 12 is arranged at the other end (namely a linear part) of the sub lock bodies; one end of the lock rod 12 is hinged with one lock body and the other end is abutted against the other lock body to limit the upward swinging of the lock rod; the locking rod is matched with a return spring (omitted in the drawing), and the return spring applies force to the locking rod to enable the locking rod to have the tendency of upwards abutting against the other lock body; the clamping mechanism is connected with the lock body and can enable the split lock bodies to swing around a hinge axis to be opened or closed; the guide mechanism comprises two pairs of spaced apart guides 31 each connecting a separate one of the lock bodies so that the lock bodies can be moved in engagement (in the direction of the length of the side bar) on the side bar 41 of the ladder 40 whilst the guide mechanism can be engaged with the cross bar 42 of the ladder to effect one-way upward movement of the device. The length of the guide piece is larger than or equal to the distance between two adjacent cross rods, so that the cross rods are always clamped between the two pairs of guide pieces, and the sub-lock bodies cannot rotate around the axis of the side rod.

In operation (see fig. 5), the user operates the clamping mechanism 20 to open the pair of split locking bodies 11 about their hinge axes 13 and then close them on the side bars 41 of the ladder 40, so that the pair of split locking bodies cannot be separated from the side bars but can be lifted up and down in the length direction of the side bars. The guide mechanism 30 is located inside the side bar 41, and it is movable (unidirectional in the length direction of the side bar) relative to the crossbar 42 while holding the crossbar of the ladder. One end of the safety belt is connected with a user, and the other end of the safety belt is connected with a connecting lug 16 of the lock body 10; the user wears the safety belt and moves up the ladder 40 to drive the lock body to ascend along the side rod 41. When the lock rod 12 meets the cross rod 42, the cross rod impacts the lock rod, so that the lock rod (overcoming the acting force of the return spring) swings downwards around the hinged shaft of the lock rod and the sub-lock body 11; and after the locking bar 12 passes the cross bar 42, the locking bar is reset by the reset spring. If the user drops down on the ladder, the locking bar 12 can abut against the corresponding cross bar 42 because the locking bar is pressed against a unlocking body 11 (the locking bar can only swing downwards but cannot swing upwards beyond the unlocking body), so that the locking device no longer runs down the side bar 41, preventing the user from further dropping down.

Preferably, as shown in fig. 2, the bottom (bottom end of the linear portion) of one of the pair of sub-lock bodies 11 is provided with a pair of lugs 14, one end of the lock rod 12 is hinged on the pair of lugs, and the other end is pressed against the bottom of the other sub-lock body; the reset spring is a torsion spring which is arranged on an articulated shaft of the lock rod and the lug and applies force to the lock rod to enable the lock rod to have upward swinging potential energy.

As shown in fig. 2: the clamping mechanism 20 comprises a pair of clamping jaws 21 which are hinged on the outer side walls of the pair of split lock bodies 11 in a one-to-one manner; the tail ends of the pair of clamping jaws are connected through the thread assembly, the thread assembly can stretch or furl the tail ends of the pair of clamping jaws, and the front ends of the pair of clamping jaws can clamp the pair of split lock bodies. The outer side wall of each sub-lock body 11 is provided with a hinge lug 15, the middle part of the clamping jaw 21 is provided with a hinge hole and is hinged with the hinge lug through a hinge pin, so that the front end of the clamping jaw can act on the front end of the sub-lock body 11 to enable the sub-lock body to be folded.

In the thread component, two ends of a thread cylinder 26 are respectively provided with a positive internal thread and a negative internal thread, and a positive bolt 22 with a bolt head 25 is tightly fixed in a strip-shaped groove 210 of one clamping jaw through a nut 24 and can be locked by a first locking nut 23; the counter-threaded rod 29 is inserted in the strip-shaped groove of one jaw and is screwed and fixed on both sides by the nut 24 (and is also locked by the other first locking nut 23); one end of the orthodontic bolt and one end of the inverted-tooth screw are simultaneously matched with the positive and negative internal threads at the two ends of the thread cylinder, and the two clamping jaws can be driven to approach or leave in opposite directions only by rotating the thread cylinder, so that the clamping jaws can drive the pair of split locking bodies to fold or separate; after the adjustment of the threaded cylinder is completed, the threaded cylinder can be locked by the second locking nut 27, so that the distance between the two clamping jaws is kept unchanged by keeping the relative position of the threaded cylinder and the counter-threaded screw (another second locking nut can be added for locking the relative position of the threaded cylinder and the orthodontic bolt).

Each minute lock body 11 includes an arc-shaped portion and a linear portion; the guide mechanism 30 includes two pairs of guides 31 arranged in parallel, the two pairs of guides being mounted in a one-to-one manner on the linear portions of a pair of split lock bodies. Wherein the arc-shaped part of the pair of split lock bodies is folded on the side bar 41 of the ladder, and the linear part of the pair of split lock bodies and the two pairs of guide members 31 (the two pairs of guide members are respectively installed on the linear part through the fixing part) are folded on both sides of the cross bar of the ladder. As can be seen in fig. 3: the linear part of one sub-lock body and a pair of guiding pieces 31 arranged on the linear part are positioned at the outer side of the ladder rail, and the linear part of the other sub-lock body and a pair of guiding pieces 31 arranged on the linear part are positioned at the inner side of the ladder rail; the distance between the guides on the two sub-lock bodies is greater than the diameter of the cross bar (obviously, the distance between the two sub-lock bodies is also kept to avoid interference with the cross bar when in use).

As a modification, each guide includes a fixed portion fixedly connected to the linear portion of the sub-lock body 11, and a movable portion engaged with the fixed portion and capable of moving up and down relative to the fixed portion (the fixed portion is separately provided with a through hole, the movable portion is slidably inserted into the through hole, and a locking screw is provided to laterally lock the movable portion on the fixed portion), that is, the total length of the guide can be adjusted or changed to accommodate the distance between two rails of different ladders. Alternatively, the movable portion of the guide is U-shaped.

The above description is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that the present invention is not limited thereto

The idea of the invention may be changed in the specific embodiments and the application range, and the content of the present description should not be construed as limiting the invention.