CN111870829B

CN111870829B - One-hand operation automatic protection descending device

Info

Publication number: CN111870829B
Application number: CN202010649358.2A
Authority: CN
Inventors: 付小华
Original assignee: Zhejiang Weihai Technology Co Ltd
Current assignee: Zhejiang Weihai Technology Co Ltd
Priority date: 2020-07-08
Filing date: 2020-07-08
Publication date: 2021-06-08
Anticipated expiration: 2040-07-08
Also published as: CN111870829A

Abstract

The invention discloses a single-hand operated automatic protection descender, aiming at solving the defect that the single-hand use and automatic protection of the traditional rope descender can not be achieved simultaneously. The rope braking device comprises an upper panel and a lower panel, wherein a main friction wheel and a braking trigger are arranged on the lower panel, the braking trigger is connected to the lower panel through a rotating connection point, a rope inlet is formed in the lower panel in the tangential direction of a guide groove and the main friction wheel, a rope enters the lower panel through the rope inlet in the tangential direction, the rope is wound on the main friction wheel and leaves the lower panel at the position far away from the rope inlet, a trigger main body and a braking handle are respectively arranged at two ends of the rotating connection point of the braking trigger, the lower panel is provided with the guide groove corresponding to the trigger main body, a main locking connector is connected in the guide groove in a sliding mode, the main locking connector abuts against the trigger main body, and the braking handle. The descender can be operated by one hand by pulling the pull rope away from the descender and changing the direction of the pull rope, so that the working state of the descender can be changed.

Description

One-hand operation automatic protection descending device

Technical Field

The invention relates to a high-altitude slow descending device, in particular to a single-hand operation automatic protection descending device.

Background

At present, the existing descender for the rope has two great defects, one is that the descender can be operated by one hand and can not realize automatic protection, and the descender can be operated by one hand and can not be operated by one hand; the inability to free the other hand of the rope during descent, particularly the particular range of use, is particularly important for freeing the hand, for example in fire rescue, military operations, etc. Such as 8-shaped rings, ATC, SIMPLE and other descenders, can be operated by one hand without a protection function, and a user can fall down after the hand is separated from the rope. Such as STOP, ID and other descenders, have an automatic braking function after being stressed, but can descend only by operating a handle with the other hand except a rope. Secondly, under the condition that the tail end of the rope is not tied with a protection knot, if the rope descends to the tail end, the rope can be separated, and a user faces the falling risk. This requires the user to be skilled in the use and time consuming to tie the rope tail. The descender without automatic protection completely depends on the grasping force of the hand holding the rope to achieve the purposes of controlling the descending speed and stopping when in use, when the descender descends to the tail of the rope, if the descender does not have a protection knot, the rope is difficult to stop descending through the grasping force of the hand, the rope can be separated from the descender to cause a falling accident, the existing descender with automatic protection also realizes descending through operating a handle by hands except the holding of the rope, the descending process is not greatly different from the descending process without automatic protection, the descending process usually has certain descending speed and inertia, if the descender reaches the tail of the rope without the protection knot, the handle is difficult to release in a very short time, and the possibility of separating from the rope is very high.

Chinese patent publication No. CN202777489U, entitled descender for a user descending a rope, discloses a descender for a user descending a rope, intended to slow down and regulate the descent of a user along the rope, having a system of arrest of said rope, which intervenes when the user lets go of the descender completely or if he/she grips it suddenly in panic, characterized in that it also allows the ascent, displacing said rope in the opposite direction, without activating any of the aforesaid arrest systems which would prevent said ascent. The rope-lowering device has the contradiction between single-hand use and automatic protection function, and can not release the other hand in the rope lowering process.

Disclosure of Invention

The invention overcomes the defect that the single-hand use and automatic protection of the conventional rope descender cannot be realized simultaneously, provides the rope descender which can simultaneously realize the single-hand operation and the automatic protection, can liberate the other hand of the rope in the descending process and simultaneously realize the automatic protection function, and aims to solve the problem that a user faces falling risks if the rope descends to the tail of the rope under the condition that the tail end of the rope is not tied with a protection knot in the conventional rope descender, so that the user is free from tying knots at the tail end.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a one-hand operation automatic protection descender, includes top panel and lower panel, is provided with main friction wheel and braking trigger on the lower panel, and the braking trigger is connected on the panel down through rotating the tie point, and the tangent direction of guide way and main friction wheel is equipped with the rope entry under on the panel, and the rope is followed through the rope entry tangent direction gets into panel down, the rope is convoluteed on main friction wheel and leaves panel down keeping away from rope entry position, and the braking trigger is equipped with trigger main part and brake lever respectively at the both ends of rotating the tie point, and the lower panel corresponds trigger main part position and is equipped with the guide way, sliding connection has the main lock connector in the guide way, main lock connector butt trigger main part, brake lever butt rope.

The descender has two use states, namely a hover-maintaining, automatic protection state and a descent state. Both states are determined by the state of the brake trigger. The trigger body and the butt of main lock connector of braking trigger, the human body is connected to the main lock connector, therefore, the trigger body has born the gravity that comes from human quality, adjust the relative gravity direction position of guide way through the gesture of panel under the adjustment, when making the main lock connector remove butt trigger body position, under leverage, the relative rotation tie point of brake handle rotates, the butt is on the rope, with rope pressure equipment in main friction pulley, trun into the relative friction force that main friction pulley tangent direction to the direction to prevent the removal of rope through the pressure of relative rope radial direction. By setting the length ratio between the trigger body and the brake lever, a force greater than the body weight can be generated at the brake lever by means of the lever, which translates into a corresponding frictional force greater than the body weight, thereby maintaining the hovering state. The second state, namely the descending state, only needs to pull the rope separated from the lower panel downwards to change the posture of the descender, the main lock connector moves to the other end of the guide groove and is separated from the trigger main body, the brake handle cannot give pressure corresponding to the rope, only small friction force generated by adhesion exists between the rope and the main friction wheel, the rope and the main friction wheel can move relatively, and under the action of gravity, a person carries the descender to descend. Therefore, the descending state can be kept only by keeping the rope leaving the lower panel downwards, and when the rope is adjusted to be upwards, the descending device immediately enters a protection state.

Another advantage of the present invention is that the hover mode is automatically entered when hands are released. In this regard, the present invention is realized by simplifying the present invention to a lever with a rope connected to the middle part, the weight of the person is concentrated on one end of the lever, the other end is the rope leaving the lower panel, i.e. the rope holding end, the two form an unequal arm lever, the arm of force of one end of the weight of the person is shorter, and the arm of force corresponding to the rope is longer. When one end of the rope is not pulled by a person, the lever can incline towards the human body under the action of gravity until the main lock connector moves to the lowest position of the guide groove, and at the moment, the rope inlet, the main lock connector and the gravity direction of the person are in a straight line to reach a stable state. Therefore, when a person does not pull the rope holding end downwards any more, the descender enters the automatic protection state.

A second object of the invention is to eliminate the need for tying knots at the tail end of the rope. In this regard, the principle of the automatic protection state of the upper section is the same. When the tail of the rope enters the lower panel, the rope handle end which can be pulled downwards does not exist necessarily, and the lever is tilted inevitably and enters an automatic protection state, so that a descender cannot fall off and fall down when the rope is used up.

Preferably, an auxiliary friction wheel is further provided, the auxiliary friction wheel, the main friction wheel and the brake trigger are arranged along the length direction of the lower panel, and the auxiliary friction wheel positions the rope to be attached to the main friction wheel. The friction wheel, the main friction wheel and the braking trigger are arranged along the length direction, and the rope leaves the lower panel and is far away from the rope inlet. The auxiliary friction wheel ensures that the wrap angle of the rope to the main friction wheel is large enough, and the friction force between the rope and the main friction wheel is improved.

Preferably, a return spring is connected to the brake trigger at the pivot connection point, and the return spring drives the brake trigger to pivot to a state in which the brake lever is disengaged from the rope. If no return spring is present, the brake lever may be separated from the rope in a bouncing manner during the descent, resulting in a certain jerk. The abrasion of the brake handle can be obviously improved and the service life of the device can be reduced for a long time. The adoption of the reset spring can improve the use feeling and is smoother.

Preferably, the guide groove is inclined in the direction of the auxiliary friction wheel. The top of the rope is connected with a protection station, passes through the descender and reaches the rope holding end, and when the descender enters an automatic protection state. The rope from the protection platform, the length direction of the guide groove and the gravity direction of the human body corresponding to the main lock connector are in a straight line. And because the guide slot is obliquely arranged, the lower panel is tilted but the length direction of the lower panel cannot become vertical. When the lower panel is pulled to a descending state, the component force generated by the pulling force corresponding to one end, close to the auxiliary friction wheel, of the lower panel is smaller as the pulling force is closer to the tangential direction of the lower panel, and the pulling force is smaller. The pulling directions of the hands of the person are approximately the same, the component force of the current lower panel inclined direction corresponding to the pulling direction is smaller, and the pulling of the person is more in line with the human engineering.

Preferably, the lower panel is connected with a trigger positioning plate in a turnover mode, and the trigger positioning plate is connected with the lower panel in a matched and rotating mode to brake a trigger. The trigger positioning plate is used primarily to position the brake trigger so that it can rotate about the pivot connection point. Secondly, the side wall of the brake handle can limit the brake handle, so that the brake handle is prevented from being too far away from the rope, and the reaction is prevented from slowing down.

Preferably, the guide groove is in a kidney-shaped hole shape, and one end of the guide groove close to the main friction wheel is provided with the auxiliary friction plate. When entering into the decline state, the gesture when rope enters into rope entry also can change, is so that with the laminating of auxiliary friction piece near the guide way more, has improved frictional force at the descending in-process, and is safer. The reason for setting up guide way waist hole form is because the main lock connector is cylindric, and the main lock connector of can laminating can be glued to the guide way both ends.

Preferably, the main friction wheel is connected with a rotation preventing shaft for preventing the main friction wheel from rotating at an eccentric position. The rotation-proof shaft can avoid the rotation of the main friction wheel, static friction rather than dynamic friction is carried out between the rope and the main friction wheel, and the friction force is larger.

Preferably, the end of the brake handle is provided with a brake point, and the main friction wheel is provided with a corresponding auxiliary brake notch corresponding to the position of the brake point. The braking point has great pressure intensity, which causes rope deformation, and the rope is embedded in the auxiliary braking gap to generate better braking effect.

Preferably, when the main lock connector abuts against an end of the guide groove remote from the main friction wheel, the main lock connector abuts against the trigger body, and the brake lever presses the rope against the main friction wheel. The above structure describes the connection of the brake trigger and the rope in the automatic protection state.

Preferably, when the main lock connector abuts against one end of the guide groove close to the main friction wheel, the rope leaving the lower panel inclines downwards, the brake handle is kept separated from the rope through the return spring, and the rope passes through the lower panel. The above construction describes the connection of the brake trigger and the rope in a lowered condition.

Compared with the prior art, the invention has the beneficial effects that: (1) the descender can be operated by one hand by pulling the pull rope away from the descender and changing the direction of the pull rope, so that the working state of the descender can be changed; (2) when the pull rope leaving the descender is not pulled any more, the descender automatically enters a protection mode; (3) the descender can automatically form a protection mode when the rope is descended and the tail end of the rope is not tied with a protection knot, so that a descender cannot fall off and fall down when the rope is used up.

Drawings

FIG. 1 is a schematic illustration of the descent state of the present invention;

FIG. 2 is a schematic diagram of the automatic protection state of the present invention;

FIG. 3 is a schematic view of the upper and lower panels of the present invention;

FIG. 4 is a schematic view of the lower panel trigger positioning plate of the present invention as it is deployed;

in the figure: the braking device comprises an upper panel 1, a lower panel 2, a main friction wheel 3, a braking trigger 4, a rotary connecting point 5, a guide groove 6, a rope inlet 7, a trigger main body 8, a braking handle 9, a main lock connector 10, a rope 11, an auxiliary friction wheel 12, a trigger positioning plate 13, an auxiliary friction plate 14, an anti-rotation shaft 15, a braking point 16, an auxiliary braking notch 17 and a rope holding end 18.

Detailed Description

The technical scheme of the invention is further described in detail by the following specific embodiments in combination with the attached drawings:

example (b):

a single-hand operated automatic protection descender comprises an upper panel 1 and a lower panel 2 as shown in any one of figures 1 to 4, a main friction wheel 3 connected through a fastening pin and a braking trigger 4 connected in a rotating mode are arranged on the lower panel 2, and an anti-rotating shaft 15 for preventing the main friction wheel 3 from rotating is connected to the eccentric position of the main friction wheel 3. The rotation preventing shaft 15 can prevent the main friction wheel 3 from rotating, static friction rather than dynamic friction is performed between the rope 11 and the main friction wheel 3, and the friction force is larger. The braking trigger 4 is connected on the lower panel 2 through a rotating connection point 5, a rope inlet 7 is arranged on the lower panel 2 in the tangential direction of the guide groove 6 and the main friction wheel 3, and a rope 11 enters the lower panel 2 through the rope inlet 7 in the tangential direction.

The rope 11 is wound on the main friction wheel 3 and leaves the lower panel 2 at a position far away from the rope inlet 7, the two ends of the brake trigger 4 at the rotary connecting point 5 are respectively provided with a trigger body 8 and a brake handle 9, the brake trigger 4 is connected with a return spring at the position of the rotary connecting point 5, and the return spring drives the brake trigger 4 to rotate to a state that the brake handle 9 is separated from the rope 11. If no return spring is present, the brake lever 9 may bounce off during the descent in contact with the rope 11, creating a certain jerk. The abrasion of the brake lever 9 is remarkably increased and the life of the device is reduced in the past for a long time. The adoption of the reset spring can improve the use feeling and is smoother. Lower panel 2 corresponds trigger body 8 position and is equipped with guide way 6, sliding connection has main lock connector 10 in the guide way 6, main lock connector 10 butt trigger body 8, brake handle 9 butt rope 11. The end part of the brake handle 9 is provided with a brake point 16, and the position of the main friction wheel 3 corresponding to the brake point 16 is provided with a corresponding auxiliary brake notch 17. The braking point 16 has a great pressure, causing the rope 11 to deform and to fit in the auxiliary braking notch 17, resulting in a better braking effect.

An auxiliary friction wheel 12 is further arranged, the auxiliary friction wheel 12, the main friction wheel 3 and the brake trigger 4 are arranged along the length direction of the lower panel 2, and the auxiliary friction wheel positions the rope 11 to be attached to the main friction wheel 3. The arrangement of the friction wheel, the main friction wheel 3 and the braking trigger 4 along the length and the cable 11 away from the lower panel 2 and away from the cable inlet 7 ensures that the force arm of the cable grip end 18 with the cable 11 is longer and less force is required to switch into the lowered state. The auxiliary friction wheel ensures that the wrap angle of the rope 11 to the main friction wheel 3 is large enough, and the friction force between the rope and the main friction wheel is improved.

The guide groove 6 is inclined toward the auxiliary friction wheel 12. The top of the line 11 is connected to a protection station, passing through the descender, to the line grip end 18, when the descender enters the automatic protection state. The rope 11 from the protective table, the length direction of the guide groove 6 and the human body gravity direction corresponding to the main lock connector 10 are in a straight line. And the lower panel 2 is tilted but its length direction does not become vertical due to the inclined arrangement of the guide groove 6. When the lower panel 2 is pulled down, the component force generated by the pulling force corresponding to the end of the lower panel 2 close to the auxiliary friction wheel 12 is smaller as the pulling force is closer to the tangential direction, and the pulling force is smaller. The pulling directions of the hands of the person are approximately the same, the component force of the current lower panel 2 in the inclined direction corresponding to the pulling direction is smaller, and the pulling of the person is more in line with the human engineering. The guide groove 6 is in a waist hole shape, and one end of the guide groove 6 close to the main friction wheel 3 is provided with an auxiliary friction plate 14. When the descending state is entered, the posture of the rope 11 entering the rope entrance 7 is also changed to be closer to the guide groove 6 so as to be in contact with the auxiliary friction plate 14, and the friction force is increased during the descending process, thereby being safer. The reason for the waist-hole shape of the guide groove 6 is that the main lock connector 10 is cylindrical, and the two ends of the guide groove 6 can be attached to the main lock connector 10. The lower panel 2 is connected with a trigger positioning plate 13 in a turnover mode, and the trigger positioning plate 13 is matched with the lower panel 2 to be connected with the brake trigger 4 in a rotating mode. The trigger positioning plate 13 serves firstly to position the brake trigger 4 such that it can be rotated about the rotational connection point 5. Secondly, the side wall of the brake handle 9 can limit the brake handle, so as to avoid the brake handle from being too far away from the rope 11, and the reaction is slow.

The descender has two use states, namely a hover-maintaining, automatic protection state and a descent state. Both states are determined by the state of the brake trigger 4. The trigger body of braking trigger 4 butts with main lock connector 10, main lock connector 10 connects the human body, therefore, the trigger body has born the gravity from the human body quality, adjust the relative gravity direction position of guide way 6 through the posture of adjusting lower panel 2, when making main lock connector 10 move to the butt trigger body position, under the leverage, brake lever 9 rotates relative rotation tie point 5 and rotates, the butt is on rope 11, press fit rope 11 in main friction wheel 3, turn into the frictional force of relative main friction wheel 3 tangential direction through the pressure of relative rope 11 radial direction and stop the removal of rope 11. By setting the length ratio between the trigger body and the brake lever 9 such that a force greater than the body weight can be generated at the brake lever 9 by means of the lever, a corresponding frictional force greater than the body weight is translated, thereby maintaining the hovering state. When the main lock connector 10 abuts against one end of the guide groove 6 far away from the main friction wheel 3, the main lock connector 10 abuts against the trigger body, and the rope 11 is pressed on the main friction wheel 3 by the brake handle 9. The above structure describes the connection relationship of the brake trigger 4 and the rope 11 in the automatic protection state.

In the second state, namely, the descending state, the person only needs to pull the rope 11 separated from the lower panel 2 downwards to change the posture of the descender, and the main lock connector 10 moves to the other end of the guide groove 6 and is separated from the trigger main body 8, so that the brake handle 9 cannot apply pressure corresponding to the rope 11, and the rope 11 and the main friction wheel 3 only have small friction force generated by adhesion and can move relatively, and the person can descend with the descender under the action of gravity. Thus, the descender can be maintained only by holding the rope 11 leaving the lower panel 2 downward, and when adjusted upward, the descender is immediately protected.

Another advantage of the present invention is that the hover mode is automatically entered when hands are released. In this respect, the invention is realized in such a way that the invention can be simplified as a lever with a rope 11 connected in the middle, the weight of the person is concentrated at one end of the lever, the other end is the rope 11 leaving the lower panel 2, i.e. the rope holding end 18, the two form an unequal arm lever, the arm of the one end of the weight of the person is shorter, and the arm of the corresponding rope 11 is longer. When one end of the rope 11 is not pulled by a person, the lever can incline towards the human body under the action of gravity until the main lock connector 10 moves to the lowest position of the guide groove 6, and at the moment, the rope inlet 7, the main lock connector 10 and the gravity direction of the person are in a straight line to reach a stable state. Thus, the descender enters the self-protecting state when the person is no longer pulling down on the rope gripping end 18. When the main lock connector 10 abuts on one end of the guide groove 6 close to the main friction wheel 3, the rope 11 separated from the lower panel 2 inclines downwards, the brake handle 9 is kept separated from the rope 11 through the return spring, and the rope 11 passes through the lower panel 2. The above structure describes the connection relationship of the brake trigger 4 and the rope 11 in the lowered state.

A second object of the invention is to eliminate the need for knotting the tail end of the rope 11. In this regard, the principle of the automatic protection state of the upper section is the same. When the tail of the rope 11 enters the lower panel 2, the rope handle end 18 which can be pulled downwards does not exist necessarily, and the lever is tilted inevitably to enter an automatic protection state, so that a descender cannot fall off and fall down when the rope 11 is used up.

The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.

Claims

1. A single-hand operated automatic protection descender is characterized by comprising an upper panel and a lower panel, wherein a main friction wheel and a brake trigger are arranged on the lower panel, the brake trigger is connected to the lower panel through a rotating connection point, a rope inlet is formed in the lower panel along the tangential direction of a guide groove and the main friction wheel, a rope enters the lower panel through the rope inlet along the tangential direction, the rope is wound on the main friction wheel and leaves the lower panel at a position far away from the rope inlet, a trigger body and a brake handle are respectively arranged at two ends of the rotating connection point of the brake trigger, the lower panel is provided with the guide groove corresponding to the trigger body, a main lock connector is connected in the guide groove in a sliding manner, the main lock connector is abutted to the trigger body and is abutted to the rope, the descender has two using states, the first state is an automatic protection state when hovering state is kept, and, the two states are determined by the state of the brake trigger, the main lock connector is connected with a human body, the trigger body bears the gravity from the mass of the human body, the position of the guide groove relative to the direction of the gravity is adjusted by adjusting the posture of the lower panel, when the main lock connector moves to the position of abutting against the trigger body, the brake handle rotates relative to the rotating connection point under the action of a lever and abuts against the rope, the rope is pressed in the main friction wheel, the movement of the rope is prevented by converting the pressure relative to the radial direction of the rope into the friction force in the tangential direction relative to the main friction wheel, the length ratio between the trigger body and the brake handle is set, so that the lever generates a force larger than the weight at the brake handle and converts the force into the corresponding friction force larger than the weight, the hovering state is maintained, when the main lock connector abuts against one end of the guide groove far away from the main friction wheel, the main lock, the rope is pressed on the main friction wheel by the brake handle, the rope separated from the lower panel is pulled downwards in the second state, the posture of the descender is changed, the main lock connector moves to the other end of the guide groove and is separated from the trigger main body, the brake handle cannot provide pressure corresponding to the rope, friction force generated by fitting and relative movement are formed between the rope and the main friction wheel, and a person carries the descender to descend under the action of gravity.

2. The one-handed automatic protective descender of claim 1, further comprising an auxiliary friction wheel, wherein the auxiliary friction wheel, the main friction wheel and the brake trigger are disposed along a length of the lower panel, and the auxiliary friction wheel positions the rope to be in contact with the main friction wheel.

3. The one-handed operated automatic safety descender of claim 1, wherein the brake trigger is connected to a return spring at the pivot connection point, the return spring urging the brake trigger to pivot to a brake lever disengaged condition from the rope.

4. A single-handed operated automatic protective descender as claimed in claim 3, wherein the guide slot is inclined to the direction of the auxiliary friction wheel.

5. The one-hand operated automatic protection descender of claim 1, wherein the lower panel is connected with a trigger positioning plate in a turnover manner, and the trigger positioning plate is connected with the lower panel in a rotating manner in a matching manner to brake a trigger.

6. The one-hand operated automatic protective descender of claim 1 or 4, wherein the guide groove is kidney-shaped, and an auxiliary friction plate is provided at an end of the guide groove close to the main friction wheel.

7. The one-hand operated automatic protective descender of claim 1, wherein the main friction wheel is eccentrically connected with an anti-rotation shaft for preventing the main friction wheel from rotating.

8. A single-hand operated automatic protective descender as claimed in claim 1 or 3, wherein the end of the brake lever is provided with a braking point, and the main friction wheel is provided with a corresponding auxiliary braking notch corresponding to the braking point.

9. The one-hand operated automatic protection descender of claims 1, 2, 3, 4, 5, and 7, wherein when the main lock joint abuts an end of the guide slot away from the main friction wheel, the main lock joint abuts the trigger body, and the brake lever presses the rope against the main friction wheel.

10. The automatic protective descending device operated by one hand as claimed in any one of claims 1, 2, 3, 4, 5 and 7 wherein when the main lock joint is abutted against the end of the guide slot near the main friction wheel, the rope leaving the lower panel is inclined downwards, the brake handle is kept separated from the rope by the return spring, and the rope passes through the lower panel.