Lock hook device for connecting ladders

Abstract

The lock hook device comprises a first pull rod and a second pull rod, the first pull rod extends downwards to be provided with a connecting rod used for being connected with the second pull rod, the second pull rod is provided with an inserting rod corresponding to the connecting rod, and the connecting rod is inserted into the inserting rod to form fixed connection; the first pull rod is shorter than the second pull rod; first lock hooks are arranged at the two ends of the first pull rod, second lock hooks are arranged at the two ends of the second pull rod, and during use, pedals of a ladder are arranged in the first lock hooks and the second lock hooks; according to the herringbone ladder, the first pull rod and the second pull rod are fixedly connected through the connecting rod and the inserting rod, the two ladders are combined into the herringbone ladder for use through the connection of the pull rods, and the two ladders are connected through the first lock hook and the second lock hook which are provided with the spring bolts, so that quick connection is facilitated; and a plurality of fixing holes and inserting holes are formed in the connecting rods and the inserting rods, so that the ladder can be suitable for being used in ladders with various pedal distances, and the application range is wider.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ladder, especially a locking hook device for connecting ladders. BACKGROUND

[0002] Firefighters need to use special ladders such as ladders and ladders for climbing operations in the process of fire emergency rescue, to achieve rapid access to the fire scene, evacuation of trapped personnel or establishment of rescue channels. However, the ladder needs to be evaluated when used, and there are certain requirements for the support point. When there is no support point in the chaotic fire environment, the ladder cannot be used. At this time, a ladder is needed to climb the operation without a support point. Since the time of fire rescue is time-consuming, the ladder needs to be combined into a ladder in a short period of time for climbing rescue. Therefore, a connecting device for quickly combining ladders into a ladder is needed. SUMMARY

[0003] In order to combine two ladders into a ladder without a support point in a short period of time, the utility model provides a locking hook device for connecting ladders.

[0004] The utility model solves the technical problems thereof by adopting the following technical scheme:

[0005] A locking hook device for connecting ladders, comprising a first pull rod and a second pull rod, the first pull rod extends downward and is provided with a connecting rod for connecting the second pull rod, the second pull rod is provided with a plug-in rod corresponding to the connecting rod, and the connecting rod is inserted into the plug-in rod to form a fixed connection; the length of the first pull rod is less than the length of the second pull rod; both ends of the first pull rod are provided with a first locking hook, and both ends of the second pull rod are provided with a second locking hook; when in use, the ladder steps are placed in the first locking hook and the second locking hook.

[0006] Since the distance between the steps of different ladders may differ, the locking hook device needs to be adjustable to adjust the distance between the first pull rod and the second pull rod to meet the use of ladders with different step distances. Therefore, in this technical scheme, the plug-in rod is a hollow structure with a plug-in slot in the center for inserting the connecting rod, and the connecting rod is inserted into the plug-in slot to be fixed.

[0007] The common way of forming fixed connection between the connecting rod and the plug-in rod is thread connection, plug-in connection and the like, but since the ladder needs to be adapted to various ladder spacings, the connecting rod and the plug-in rod are connected by a pin; the connecting rod and the plug-in rod are fixedly connected by a plug pin, a plurality of insertion holes are arranged on the side wall of the connecting rod, a corresponding fixing hole is arranged on the plug-in rod, and the plug pin is inserted into the fixing hole and the insertion hole from one side and is threaded out of the fixing hole and the insertion hole from the other side.

[0008] One end of the plug pin is provided with a gear ring, and the other end is provided with an elastic protrusion, and the sum of the diameter of the plug pin and the height of the elastic protrusion is greater than the hole diameter of the fixing hole.

[0009] The first and second hooks are provided with downwardly-opened notches, and the ladder steps are placed in the first and second hooks from the notches.

[0010] The first and second hooks are further provided with lock tongues, the lock tongues are in the shape of a circular arc, in the locked state, the lock tongues and the first and second hooks form a closed circular ring, and the ladder steps are placed in the formed closed circular ring.

[0011] Since the rescue site is relatively complex, the first and second hooks are connected behind the ladder steps, and the stability of the connection needs to be maintained, the ladder steps cannot be taken out of the first and second hooks, otherwise the ladder will collapse, affecting the personal safety of the fire rescue personnel, therefore, in order to improve the safety of the hook device, an elastic cavity is arranged in the first and second hooks, a spring is arranged in the elastic cavity, the spring abuts against the lock tongue to make the lock tongue and the first and second hooks form a closed circular ring, and the ladder steps are placed in the closed circular ring formed by the first and second hooks and the lock tongue, so that the ladder steps are locked in the first and second hooks and cannot be taken out, and the safety of the hook device is improved.

[0012] The first and second hooks are further provided with lock tongues, the lock tongues are in the shape of a circular arc, in the locked state, the lock tongues and the first and second hooks form a closed circular ring, and the ladder steps are placed in the formed closed circular ring. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model is further described below in combination with the drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is an exploded schematic diagram of the utility model.

[0016] Figure 3 is a use state diagram of the utility model.

[0017] Figure 4 is Figure 2 is an enlarged view of A in the middle. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below by combining with specific implementation manners and referring to the drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0019] It is understood that the above description is only exemplary, and is not intended to limit the scope of the utility model.

[0020] With reference to Figures 1 to 4 A locking hook device for connecting ladders, comprising a first pull rod 1 and a second pull rod 2, the first pull rod 1 is provided with a connecting rod 10 for connecting the second pull rod 2, the second pull rod 2 is provided with a plug-in rod 20 corresponding to the connecting rod 10, the connecting rod 10 is inserted into the plug-in rod 20 to form a fixed connection; the length of the first pull rod 1 is less than the length of the second pull rod 2; both ends of the first pull rod 1 are provided with a first locking hook 11, both ends of the second pull rod 2 are provided with a second locking hook 21, and in use, the ladder steps are placed in the first locking hook 11 and the second locking hook 21; the utility model adopts a connecting rod and a plug-in rod to form a fixed connection between the first pull rod and the second pull rod, two ladders are combined into a ladder by the connection of the pull rod, and the first locking hook and the second locking hook with a locking tongue are used to connect two ladders, so that quick connection is facilitated; and a plurality of fixing holes and plug-in holes are arranged on the connecting rod and the plug-in rod, so that the ladder with various step spacings can be used, and the application range is more extensive.

[0021] The insertion rod 20 is a hollow structure, and a insertion slot 22 is arranged in the center of the insertion rod 20 for inserting the connecting rod 10, and the connecting rod 10 is inserted into the insertion slot 22 to be fixed; the connecting rod 10 and the insertion rod 20 are fixedly connected through the insertion pin 3, the side wall of the connecting rod 10 is provided with a plurality of insertion holes 12, the insertion rod 20 is provided with corresponding fixing holes 23, and the insertion pin 3 is inserted into the fixing hole 23 and the insertion hole 12 from one side and is pulled out from the fixing hole 23 and the insertion hole 12 from the other side; one end of the insertion pin 3 is provided with a gear ring 30, and the other end is provided with an elastic protrusion 31, and the sum of the diameter of the insertion pin 3 and the height of the elastic protrusion 31 is greater than the hole diameter of the fixing hole 23; the elastic protrusion in the embodiment adopts the structure disclosed in CN2319184Y, and details are not described herein again; in the embodiment, the insertion pin with the elastic protrusion is used to fix the connecting rod in the insertion slot, and when assembled, the insertion pin can be directly inserted into the fixing hole to achieve locking; conversely, when disassembled, the insertion pin is pulled outwards with force, and the elastic protrusion is retracted into the insertion pin; the insertion pin is used for locking, and disassembly is more convenient, and quick disassembly and assembly of the hook device can be achieved.

[0022] The first hook 11 and the second hook 21 are provided with notches with openings downward, and the steps of the ladder are placed into the first hook 11 and the second hook 21 from the notches; the first hook 11 and the second hook 21 are further provided with a lock tongue 4, the lock tongue 4 is in the shape of a circular arc, in the locked state, the lock tongue 4 and the first hook 11 and the second hook 21 form a closed circular ring, and the steps of the ladder are placed in the closed circular ring; the first hook 11 and the second hook 21 are provided with an elastic cavity, and a spring is installed in the elastic cavity, the spring tightly presses the lock tongue 4 to form a closed circular ring with the first hook 11 and the second hook 21; in the embodiment, the lock tongue 4 is arranged on the first hook 11 and the second hook 21, after the first hook 11 and the second hook 21 hook the steps of the ladder, in order to prevent the steps of the ladder from being unhooked when the ladder shakes or moves, the lock tongue and the first hook 11 and the second hook 21 form a closed connecting circular ring, and the safety of the hook device is improved.

[0023] In use, the insertion pin 3 is pulled out of the fixing hole, the lock tongue 4 is pulled, the steps of the ladder are placed into the first hook 11 and the second hook 21 from the notches, after the first hook 11 and the second hook 21 hook the steps of the ladder, the relative positions between the connecting rod 10 and the insertion rod 20 are adjusted, the included angle between the two ladders is adjusted, after the relative positions between the connecting rod 10 and the insertion rod 20 are determined, the insertion pin 3 is inserted into the fixing hole to fix the positions of the connecting rod 10 and the insertion rod 20, and the assembly is completed; the spacing between the fixing holes can be adaptively produced according to specific needs, a larger number of fixing holes can be arranged to increase the adjustment accuracy, and more kinds of ladders with different step spacings can be adapted.

[0024] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0025] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0026] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A carabiner device for connecting a ladder, characterized in that The utility model provides a ladder, including first pull rod (1) and second pull rod (2), first pull rod (1) is provided with the connecting rod (10) for connecting second pull rod (2) to the downward extension, second pull rod (2) is provided with the plug-in rod (20) corresponding with connecting rod (10), connecting rod (10) is inserted into plug-in rod (20) and forms fixed connection, the length of first pull rod (1) is less than the length of second pull rod (2), both ends of first pull rod (1) are provided with first lock hook (11), both ends of second pull rod (2) are provided with second lock hook (21), when using, the step of ladder is placed in first lock hook (11) and second lock hook (21).

2. A carabiner device for connecting a ladder according to claim 1, characterized in that The plug-in rod (20) is a hollow structure, and a plug-in slot (22) is arranged at the center for inserting the connecting rod (10), and the connecting rod (10) is inserted into the plug-in slot (22) to be fixed.

3. A carabiner device for connecting a ladder according to claim 2, characterized in that The connecting rod (10) and the plug-in rod (20) are fixedly connected through a bolt (3), a side wall of the connecting rod (10) is provided with a plurality of insertion holes (12), the plug-in rod (20) is provided with corresponding fixing holes (23), and the bolt (3) is inserted into the fixing hole (23) and the insertion hole (12) from one side and passes through the fixing hole (23) and the insertion hole (12) from the other side.

4. A carabiner arrangement for connecting a ladder according to claim 3, characterized in that One end of the bolt (3) is provided with a gear ring (30), and the other end is provided with an elastic protrusion (31), and the sum of the diameter of the bolt (3) and the height of the elastic protrusion (31) is greater than the hole diameter of the fixing hole (23).

5. The carabiner device for connecting a ladder according to claim 1, wherein The first lock hook (11) and the second lock hook (21) are provided with notches with downward openings, and the steps of the ladder are placed in the first lock hook (11) and the second lock hook (21) from the notches.

6. The carabiner device for connecting a ladder according to claim 1, wherein The first lock hook (11) and the second lock hook (21) are further provided with a lock tongue (4), the lock tongue (4) is in the shape of a circular arc, in the locked state, the lock tongue (4) and the first lock hook (11) and the second lock hook (21) form a closed ring, and the steps of the ladder are placed in the closed ring.

7. A carabiner arrangement for connecting a ladder according to claim 6, characterized in that The first lock hook (11) and the second lock hook (21) are provided with an elastic cavity, and a spring is installed in the elastic cavity, and the spring tightly presses the lock tongue (4) to form a closed ring with the first lock hook (11) and the second lock hook (21).

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