Automatic tightening mechanism for protective net

Abstract

The utility model provides a protective net automatic tightening mechanism which comprises a plurality of stand columns, a protective net is arranged between every two adjacent stand columns in a pulling mode, at least two pulling ropes are fixed to the protective net, sliding blocks are connected into the stand columns in a sliding mode, pulleys are arranged on the sliding blocks in a rotating mode, the sliding blocks and the stand columns are fixed through tension springs, and the stand columns are connected with rope winding wheels in a rotating mode. The pull rope is fixed with a rope winding wheel after bypassing the pulley, the rope winding wheel is directly connected with a motor, and the travel switch is connected with the motor and matched with the sliding block. The device is convenient to operate and simple in structure, when the protective net is loosened, the tension spring can drive the pull rope to tighten through the sliding block, so that the protective net is kept in a tensioned state, meanwhile, the rope winding wheel is arranged, and when the pull rope is loosened too much and the elasticity of the pull rope is weakened, the rope winding wheel winds a part of the pull rope, so that the pull rope is kept in the tensioned state again; and the protective net is continuously tightened.

Description

TECHNICAL FIELD

[0001] The utility model relates to passive protection net technical field, concretely relates to a protection net automatic tightening mechanism. BACKGROUND

[0002] In the complex terrain region such as mountainous area, hilly area, due to natural factors such as weathering, rainfall, earthquake, and human engineering activities such as road construction, mining, building construction, etc., the side slope instability, rock collapse, rockfall and other geological disasters occur from time to time, which constitute a serious threat to the road, building, personnel and equipment below. Passive protection net is a kind of flexible protection facilities for preventing rock and soil from falling and protecting personnel and equipment safety.

[0003] The patent with publication number CN 220644306 U discloses a safety type side slope passive protection net, which comprises a fixed column and a fixed frame, the inner side of the fixed column is provided with a fixed frame, the inner side of the fixed frame is provided with a buffer net, the buffer net and the fixed frame are fixedly connected, the inner wall of the fixed column is provided with a sliding groove, the inside of the sliding groove is provided with a sliding block, the sliding block and the sliding groove are slidingly connected, one side of the sliding block is provided with a spring, the spring and the sliding block are fixedly connected, one side of the buffer net is provided with a buffer ring, and the buffer ring is provided with a plurality of buffer rings. However, the device still has the following problems:

[0004] With the corrosion, wear and tear of the material of the protection net, the strength and elasticity decrease, or due to installation, slight geological activity, etc., when the net body is loose, the tightness of the protection net cannot be detected in time, which can easily lead to weakening of the protection effect. UTILITY MODEL CONTENT

[0005] In order to solve the problems existing in the prior art, a protection net automatic tightening mechanism is provided to solve the problem that the protection net cannot be tightened in time in the above technical problems.

[0006] The utility model solves the technical problems and adopts the technical scheme of:

[0007] The utility model provides a protection net automatic tightening mechanism, which comprises a plurality of stand columns, a protection net is arranged between adjacent two stand columns, at least two pull ropes are fixed on the protection net, a sliding block is slidingly connected in the stand column, a pulley is rotatably arranged on the sliding block, the sliding block and the stand column are fixed through a tension spring, the stand column is rotatably connected with a rope winding wheel, the pull rope is fixed with the rope winding wheel after winding around the pulley, the rope winding wheel is directly connected with a motor, and the protection net automatic tightening mechanism further comprises a travel switch connected with the motor, and the travel switch is matched with the sliding block.

[0008] Preferably, the travel switch is a first switch, a pressure rod is slidably connected to the stand, and two ends of the pressure rod are matched with the first switch and the sliding block respectively; when the sliding block drives the pressure rod to contact the first switch, the pressure rod presses the first switch at this time, and the motor starts to work.

[0009] Preferably, the first switch and the stand are fixed through a spring, the stand is slidably connected with a limiting rod for limiting the contraction of the spring, and the limiting rod is matched with the sliding block.

[0010] Preferably, the stand is fixedly connected with a second switch, and a warning lamp is further fixed to the outer side of the stand; the second switch is electrically connected with the warning lamp.

[0011] Preferably, a fixed wheel and a clamping wheel are rotatably connected to the stand, the pull rope is arranged between the fixed wheel and the clamping wheel, and the fixed wheel is coaxially fixed with a one-way bearing.

[0012] Preferably, the clamping wheel is rotatably sleeved on a rotating shaft, the rotating shaft is slidably connected with the stand, a screw rod is threadedly connected to the stand, and one end of the screw rod abuts against the rotating shaft.

[0013] Preferably, a plurality of insertion grooves are formed in the winding wheel, a plug rod capable of being inserted into the insertion grooves is slidably connected to the stand, and the plug rod is fixed to the stand through a compression spring.

[0014] Preferably, a bottom plate is fixed to the bottom of the stand, and a plurality of fixing nails are fixed to the bottom plate.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The utility model sets up the tension spring, when the protective net is loose, the tension spring is driven by the sliding block to make the pull rope be tightened, so that the protective net keeps the tension state, and simultaneously sets up the winding wheel, when the pull rope is loosened too much, leads to the tension spring elasticity to weaken, at this time, the winding wheel winds up a part of the pull rope, so that the tension spring keeps the tension state again, continuously keeps the tightening of the protective net, and helps to improve the protection effect of the protective net.

[0017] 2. The utility model sets up the first switch, when the pull rope is loosened to a certain degree, the tension spring will pull the sliding block to touch the first switch, the sliding block presses the first switch, the motor directly connected with the winding wheel is electrified, drives the winding wheel to wind up the pull rope, the total length of the pull rope is shortened, so that the sliding block is reset, at this time, the tension spring tension gradually increases, recovers the tension, and is favorable for keeping the tension of the tension spring to the pull rope when the pull rope is loosened subsequently.

[0018] 3. The utility model discloses set up the limit rod and the second switch, when the slider touches the first switch, makes the motor drive the rope reel and retracts once the pull rope, and the pull rope drives the slider to remove, and the slider will drive the limit rod and remove the location of spring, and the spring pulls the first switch and makes it not on the movement track of slider, when the pull rope relaxes again, will touch the second switch, make the alarm, when touch the second switch, explain the pull rope relaxation excessive at this time, and the intensity drops, and continue to use easy to cause the accident to take place, and timely alarm, convenient for staff positioning and overhauling. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and / or additional aspects and advantages of the utility model will become apparent and more readily appreciated from the following description of the embodiments, with reference to the following drawings, in which:

[0020] Figure 1 It is the utility model perspective view;

[0021] Figure 2 It is the utility model front view;

[0022] Figure 3 It is the utility model column internal structure's schematic view;

[0023] Figure 4 It is the utility model clamping wheel structure's schematic view;

[0024] Figure 5 It is the utility model tightening mechanism's schematic view (working state one);

[0025] Figure 6 It is the utility model tightening mechanism's schematic view (working state two)。

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, column;2, protective net;3, pull rope;4, slider;5, tension spring;6, rope reel;7, pulley;8, first switch;9, spring;10, limit rod;11, second switch;12, warning light;13, fixed wheel;14, clamping wheel;15, one-way bearing;16, rotating shaft;17, screw;18, bottom plate;19, fixed nail;20, slot;21, plug rod;22, pressure bar;23, power supply. DETAILED DESCRIPTION

[0028] The embodiments of the utility model will be described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and can not be understood as limiting the utility model.

[0029] As Figures 1-6As shown, the embodiment proposes an automatic tightening mechanism of protective net, which comprises a plurality of columns 1, a protective net 2 is arranged between two adjacent columns 1, at least two pull ropes 3 are fixed on the protective net 2, a sliding block 4 is slidably connected in the column 1, a pulley 7 is rotatably connected on the sliding block 4, the sliding block 4 is fixed with the column 1 through a tension spring 5, the column 1 is rotatably connected with a rope winding wheel 6, the pull rope 3 is fixed with the rope winding wheel 6 after passing through the pulley 7, the rope winding wheel 6 is directly connected with a motor, and the automatic tightening mechanism further comprises a travel switch connected with the motor and matched with the sliding block 4.

[0030] In the initial state, the tension spring 5 is in the stretched state, when the pull rope 3 is relaxed, the tension spring 5 is contracted under the elastic force, the sliding block 4 is pulled to move, and the sliding block 4 drives the pull rope 3 to move, so that the pull rope 3 is re-tensioned.

[0031] The motor can drive the rope winding wheel 6 to rotate, and the rope winding wheel 6 can wind the pull rope 3.

[0032] When the pull rope 3 is relaxed, the tension spring 5 is contracted to drive the pulley 7 to move, the pulley 7 drives the pull rope 3 to be re-tensioned, when the pull rope 3 is relaxed to a certain extent, the elastic force of the tension spring 5 is reduced, at this time, the motor is started to make the rope winding wheel 6 wind the pull rope, and the pulley 7 and the sliding block 4 are reset, so that the tension spring 5 is stretched to accumulate elastic force again, which is beneficial to tension the continuously relaxed pull rope 3.

[0033] The travel switch is a first switch 8, the column 1 is slidably connected with a pressing rod 22, both ends of the pressing rod 22 are matched with the first switch 8 and the sliding block 4 respectively, when the sliding block 4 drives the pressing rod 22 to contact the first switch 8, the pressing rod 22 presses the first switch 8 at this time, so that the motor starts to work.

[0034] The first switch 8 is fixed with the column 1 through a spring 9, the column 1 is slidably connected with a limiting rod 10 which limits the contraction of the spring 9, the limiting rod 10 limits the movement of the first switch 8 and the contraction of the spring 9, and the limiting rod 10 is matched with the sliding block 4.

[0035] When the pull rope 3 is relaxed, the sliding block 4 slides, the sliding block 4 drives the pressing rod 22 to slide, after the pressing rod 22 presses the first switch 8, the motor starts to rotate to wind the pull rope 3, the pulley 7 drives the sliding block 4 to move, when the tension spring 5 is stretched to the maximum length, the sliding block 4 drives the limiting rod 10 to slide and is separated from the first switch 8, at this time, the spring 9 is contracted to drive the first switch 8 to separate from the pressing rod 22, so that the first switch 8 is de-energized, the motor drives the rope winding wheel 6 to stop rotating, and the tension spring 5 is reset at this time.

[0036] The column 1 is fixedly connected with a second switch 11, and the column 1 is further fixedly connected with a warning lamp 12, and the second switch 11 is electrically connected with the warning lamp 12.

[0037] The first switch 8 and the second switch 11 are specifically press-type spring switches, which are generally composed of a press button, a spring, a fixed seat and a conductive contact. The press button is usually made of plastic or metal material and has certain pressing performance and mechanical strength. The spring functions to automatically reset the button and ensure the elasticity of the pressing. The fixed seat is used to fix the button and the spring and ensure that their positions do not change. The conductive contact is a key part of the circuit and is connected by pressing the button to make the contact connect or disconnect the circuit, thereby realizing the function of the switch.

[0038] The tension spring 5 has a front end in the stretching direction and a rear end in the contraction direction, and the second switch 11 is located at the rear end of the first switch 8.

[0039] When the pull rope 3 is relaxed again, the tension spring 5 drives the sliding block 4 and the pulley 7 to tension the pull rope 3. Since the spring 9 has pulled the first switch 8 to be separated from the pressure rod 22, even if the tension spring 5 drives the sliding block 4 to be reconnected with the pressure rod 22, the first switch 8 will not work. With the continuous relaxation of the pull rope 3, the sliding block 4 can continue to move downward. When the sliding block 4 pushes the pressure rod 22 to be connected with the second switch 11, the second switch 11 is powered on, the warning light 12 works, and it is indicated that the relaxation degree of the pull rope 3 is too large at this time, and the pull rope 3 needs to be repaired. After the warning light 12 is turned on, the maintenance personnel can also locate the position that needs to be repaired.

[0040] The stand 1 is also provided with a signal transmitter connected with the second switch 11. After the warning light 12 is turned on, the transmitter starts to work to transmit a signal to the backstage to remind the personnel to repair in time.

[0041] The stand 1 is rotatably connected with a fixed wheel 13 and a clamping wheel 14, and the pull rope 3 passes through the fixed wheel 13 and the clamping wheel 14. The fixed wheel 13 is coaxially fixed with a one-way bearing 15.

[0042] When the protective net is impacted after the tension spring 5 drives the pull rope 3 to be tensioned through the pulley 7, the one-way bearing 15 locks the fixed wheel 13, so that the fixed wheel 13 cannot rotate reversely, thereby preventing the pull rope 3 from being retracted and being beneficial to keeping the pull rope 3 tensioned.

[0043] The clamping wheel 14 is rotatably sleeved on a rotating shaft 16, the rotating shaft 16 is slidably connected with the stand 1, a screw rod 17 is threadedly connected with the stand 1, and one end of the screw rod 17 abuts against the rotating shaft 16.

[0044] By rotating the screw rod 17, the clamping wheel 14 can be close to the fixed wheel 13, the pull rope 3 can be further clamped, the clamping degree of the pull rope 3 is improved, and the clamping wheel 14 can adapt to the pull rope 3 with different diameters.

[0045] A plurality of insertion slots 20 are formed in the winding wheel 6, the stand 1 is slidably connected with an insertion rod 21 which can be inserted into the insertion slot 20, and the insertion rod 21 is connected with the stand 1 through a compression spring.

[0046] The insertion rod 21 enables the rope collecting wheel 6 to rotate only in the forward direction and cannot rotate in the reverse direction, which can further prevent the rope 3 from being pulled out again and causing the protective net to be loose when the clamping wheel 14 does not clamp the rope 3.

[0047] The bottom plate 18 is fixed at the bottom of the column 1, and a plurality of fixing nails 19 are fixed on the bottom plate 18.

[0048] The bottom plate 18 is fixed to the ground, and the fixing nails 19 are inserted into the ground, which can further reinforce the connection between the column 1 and the ground and improve the protection effect.

[0049] The power supply 23 is used to supply power to the entire device.

[0050] When it is necessary to release the rope 3, the screw rod 17 needs to be rotated in the reverse direction to loosen the clamping wheel 14, and the insertion rod 21 is pulled out, so that the rope 3 can be pulled to release the rope from the rope collecting wheel 6.

[0051] Specific working process:

[0052] S1: After the column 1 is fixed at a specified position by the bottom plate 18 and the fixing nails 19, the protective net 2 is installed on the column 1, one end of the rope on the protective net 2 is fixed to the column 1, the other end is fixed to the rope collecting wheel 6 on the adjacent column 1, then the rope collecting wheel 6 is rotated to make the rope 3 drive the pulley 7 and the sliding block 4 to rise, so that the sliding block 4 contacts the limiting rod 10;

[0053] S2: When the protective net material is corroded, worn, its strength and elasticity are decreased, or installed, slight geological activity, etc., the protective net is loose, the rope 3 can no longer maintain the tension state, at this time, under the action of the tension spring 5, the sliding block 4 and the pulley 7 are moved, and the rope 3 is re-tensioned;

[0054] S3: After the rope 3 is relaxed to a certain extent, the sliding block 4 moves to the rear end of the tension spring 5, the sliding block 4 drives the pressure rod 22 to press the first switch 8, the first switch 8 is powered on, the motor drives the rope collecting wheel 6 to wind the rope 3, and at the same time drives the sliding block 4 to rise, so that the tension spring 5 is recharged, which is conducive to the subsequent tensioning of the rope 3;

[0055] S4: After the sliding block 4 moves to the front end of the tension spring 5, the limiting rod 10 will be removed from the limiting position of the first switch 8, the spring 9 pulls the first switch 8 away from the pressure rod 22, the first switch 8 is powered off, and the motor drives the rope collecting wheel 6 to stop rotating, at this time the tension spring 5 is recharged;

[0056] S5: When the rope 3 is relaxed again, the tension spring 5 is contracted again, and when the sliding block 4 drives the pressure rod 22 to contact the second switch 11, it indicates that the rope 3 is relaxed too much at this time, the second switch 11 is pressed to drive the warning light 12 to be powered on and flash to alarm, and the signal transmitter transmits a signal to the background to remind the maintenance.

[0057] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A protective net automatic tightening mechanism, comprising a plurality of upright columns (1), a protective net (2) being pulled between two adjacent upright columns (1), characterized in that, The protective net (2) is fixed with at least two pull ropes (3), the sliding block (4) is slidably connected in the stand (1), the pulley (7) is rotatably connected on the sliding block (4), the sliding block (4) is fixed between the stand (1) through the tension spring (5), the stand (1) is rotatably connected with the rope collecting wheel (6), the pull rope (3) is fixed with the rope collecting wheel (6) after passing through the pulley (7), the rope collecting wheel (6) is directly connected with the motor, and the travel switch connected with the motor is further included, and the travel switch is matched with the sliding block (4).

2. A self-tightening mechanism for a protective net according to claim 1, characterized in that, The travel switch is a first switch (8), the pressure rod (22) is slidably connected with the stand (1), and the two ends of the pressure rod (22) are matched with the first switch (8) and the sliding block (4) respectively, when the sliding block (4) drives the pressure rod (22) to contact the first switch (8), the pressure rod (22) presses the first switch (8) at this time, and the motor starts to work.

3. A self-tightening mechanism for a protective net according to claim 2, characterized in that, The first switch (8) is fixed between the stand (1) through the spring (9), the stand (1) is slidably connected with the limiting rod (10) for limiting the contraction of the spring (9), and the limiting rod (10) is matched with the sliding block (4).

4. A self-tightening mechanism for a protective net according to claim 3, characterized in that, The stand (1) is fixedly connected with the second switch (11), and the stand (1) is further fixed with the warning lamp (12) outside, and the second switch (11) is electrically connected with the warning lamp (12).

5. The automatic tightening mechanism of a protective net according to claim 1, characterized in that, The stand (1) is rotatably connected with the fixed wheel (13) and the clamping wheel (14), the pull rope (3) is arranged between the fixed wheel (13) and the clamping wheel (14), and the fixed wheel (13) is coaxially fixed with the one-way bearing (15).

6. A self-tightening mechanism for a protective net according to claim 5, characterized in that, The clamping wheel (14) is rotatably arranged on the rotating shaft (16), the rotating shaft (16) is slidably connected with the stand (1), the screw rod (17) is threadedly connected with the stand (1), and one end of the screw rod (17) abuts against the rotating shaft (16).

7. The automatic tightening mechanism of a protective net according to claim 1, characterized in that, A plurality of insertion grooves (20) are formed in the rope collecting wheel (6), the stand (1) is slidably connected with the insertion rod (21) capable of being inserted into the insertion groove (20), and the insertion rod (21) is fixed with the stand (1) through the compression spring.

8. A protective net automatic tightening mechanism according to claim 1, characterized in that, The bottom plate (18) is fixed at the bottom of the stand (1), and a plurality of fixing nails (19) are fixed on the bottom plate (18).

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