WO2022007598A1

WO2022007598A1 - Single-handed automatic-protection descender

Info

Publication number: WO2022007598A1
Application number: PCT/CN2021/099944
Authority: WO
Inventors: 付小华
Original assignee: 浙江唯海科技有限公司
Priority date: 2020-07-08
Filing date: 2021-06-15
Publication date: 2022-01-13
Also published as: CN113384826A

Abstract

Disclosed is a single-handed automatic-protection descender, comprising a housing. The housing is provided with a lock hole, a limiting frictional portion, an unlocking descending frictional portion, and a self-locking tooth socket. A rope entrance and exit opening for threading a rope is provided between the limiting frictional portion and the unlocking descending frictional portion. The single-handed automatic-protection descender further comprises an auxiliary tooth socket. The auxiliary tooth socket and the self-locking tooth socket are located on two sides of a lock hole, respectively, and the position of the auxiliary tooth socket is lower than that of the self-locking tooth socket. The present invention can achieve operation with a single hand when the descender is used to descend on a rope, and immediate automatic protection by the descender when the hand releases a brake rope. In a process of descending on the rope, the present invention will automatically enter a protection mode when a tail end of the rope has not been tied with a protection knot, such that when the rope of a descending user runs out, the rope will not come out and cause the user to fall, thereby achieving automatic protection in a two-rope descent scenario.

Description

One-hand control self-protection descender

technical field

The invention relates to the technical field of high-altitude descending devices, in particular to a single-hand control self-protection descender.

Background technique

The descender is a protective device used to protect the operator in sports or rescue scenarios such as expansion training, mountaineering, extreme, outdoor, etc. The existing rope descenders have the following shortcomings: (1) those that can be operated with one hand cannot realize automatic protection, and those that can realize automatic protection cannot be operated with one hand; The unique use range is especially important for freeing hands, such as fire rescue, military operations, etc. Descenders such as figure 8, ATC, SIMPLE, etc., are operated with one hand but do not have a protective function. After the hand is released from the rope, the user will fall. Descenders such as STOP, ID, etc., have an automatic stop function after being subjected to force, but it is necessary to hold the handle with the other hand other than the rope to achieve descending; (2) The existing rope descenders do not protect the end of the rope In the case of a knot, if the descent reaches the end of the rope, the rope will break away, and the user faces the risk of falling. This requires the user to have professional skills during use and to spend time tying the end of the rope. The descender without automatic protection relies entirely on the grip of the hand holding the rope to achieve the purpose of controlling the descending speed and stopping. The rope will come out of the descender, resulting in a falling accident. The existing descender with automatic protection also uses a hand other than the rope to operate the handle to achieve the descent. In fact, the descending process is not much different from that without automatic protection. Usually There is a certain descending speed and inertia during the descending process. If it reaches the end of the rope without a protective knot, it is difficult to release the handle in a very short time, so the possibility of breaking off the rope is also very high; A self-locking descender for double abseiling, which is often used in outdoor sports.

For example, European Patent Publication No. EP0688581B1 discloses a descender-tethering device comprising: a first side guide flange for the rope, which includes a braking protrusion, a second side guide method for the rope A flange that is separated from the first flange by a lateral gap for rope passage and capable of being in spaced positions for placing and removing the rope and the rope is confined to the lateral gap serving as a rope passage A cam that engages between the first and second flanges and is movable toward and away from the brake projection, a cam operating unit that can be actuated by a user to move the cam away from the brake The movable protrusion is displaced, and the cam return spring is used to push the cam to move between the first and second flanges, and is used as the lateral gap of the rope channel, and the lateral gap is between the rope input end near the braking protrusion and the cam near the cam. Extending between the rope output ends, the rope output ends are formed to allow orientation of the rope output ends according to the locked orientation in which the rope passes through the lateral gap which acts as a rope passage while surrounding the cam and orients the cam towards the lock. At least one of the first and second flanges extending longitudinally from the connecting end to the coupling end where the braking boss, the cam, and the transverse gap serving as a cable passage are located at the connecting end, and the coupling A mechanism is located at the coupling end. The descender-tethering device achieves assisted sliding in the absence of tension on the rope by means of a cam return spring that pushes the cam away from the detent lug, and when the cam operating unit is released during the descending movement of the rope, the tension on the rope is directed toward the detent lug. Push the cam so that the rope is pressed by the cam on the braking protrusion, so as to realize the braking of the descending movement. However, as mentioned above, the descender-tether device has the problem that the user's hands cannot be released. When the user's hands are released from the rope, it does not have an automatic protection function, so it cannot be used in special occasions such as fire rescue.

SUMMARY OF THE INVENTION

In the prior art, the descender cannot realize the coexistence of the one-hand operation function and the automatic protection function, and it is difficult for the user to operate in special occasions such as fire rescue. In order to overcome these defects, the present invention provides a single-hand control self-protection descender, which can realize the coexistence of automatic protection function and single-hand operation function when both hands are released from the rope, and can be effectively used in special occasions such as fire rescue and rescue. Improve rescue efficiency. In addition, when the end of the rope is not tied with a protective knot, the descender will not be separated from the rope, which improves the convenience of use and has good safety protection performance.

The technical scheme of the present invention is: a single-hand control self-protection descender, including a casing, on which are provided a lock hole, a limit friction part, an unlocking descending friction part and a self-locking tooth slot, the limiting friction part and the unlocking descending friction There is a rope entrance and exit for threading the rope between the parts. The one-hand control self-protection descender also includes an auxiliary tooth slot. The auxiliary tooth slot and the self-locking tooth slot are located on both sides of the lock hole, and the position of the auxiliary tooth slot is low. in self-locking teeth. When in use, the descender puts on the safety belt, and then uses the safety lock to connect the safety belt and the keyhole, and the safety lock is locked. The output resistance of the rope, when the braking end force of the rope disappears, the limit friction part will make the descender rotate under the reaction force of the rope being straightened by the gravity of the descender, and the friction force with the rope will make the descender enter the self-locking protection state. In the descending mode, the unlocking and descending friction part rubs the rope together with the main lock and the limit friction part to form descending resistance, so that the descender's handshake end will not be too hard, but there is very little friction with the rope when the descender turns to the self-locking protection state. , so that the descender quickly enters the self-locking protection state. The limit friction part and the unlocking and descending friction part are opposite to each other, so that the rope and the descender are roughly parallel to the long axis direction of the lock hole, and the safety lock pulls down the rope along the long axis direction of the lock hole under the gravity of the descender. Part of the rope is pressed into the self-locking tooth slot, the rope is squeezed by the self-locking tooth slot and the safety lock, and then stagnates to form a self-locking protection state. . Auxiliary gullets prevent the rope from locking up in the descender from switching to descending mode if the user is overweight.

Preferably, the limit friction part and the unlocking and descending friction part are located at both ends of the top of the casing, and the angle formed between the highest point of the limit friction part and the midpoint of the lock hole and the long axis of the lock hole is within the range of ±15° . The angle between the highest point of the limit friction part and the middle line of the lock hole determines the position of the limit friction part on the housing, and also determines the magnitude of the frictional force on the rope that the limit friction part and the unlocking and descending friction part can generate. It plays an auxiliary role in switching between the two states of self-locking and descending. For the ropes of common specifications, the friction force generated by the included angle range of ±15° is the most appropriate, which can not only produce a better self-locking effect, but also will not exceed the operating force of the person and cause the descender to be unable to operate.

Preferably, the casing comprises a casing main body and a pair of plate bodies, the casing main body has a cavity formed by circumferentially closing the casing wall, the top and bottom of the casing main body are open, the inlet and outlet rope openings are located at the top of the casing main body, and the plate body is fixed At the bottom of the shell wall of the shell body, the two plates are parallel to each other and are respectively arranged on a pair of opposite surfaces of the shell wall of the shell body. The locking hole includes a first locking hole and a first locking hole. A locking hole is respectively arranged on the two plates. .

Preferably, the shell wall of the shell body on the side where the unlocking and descending friction part is located has a curved surface portion, the curved surface portion is recessed into the interior of the shell body, and the outermost edge of the shell body shell wall of the curved surface portion is lower than the highest point of the curved surface portion, and the unlocking descending The friction portion is located on the curved portion. After the rope exits from the rope entrance and exit, the rope is usually pulled downward. If the curved surface is not provided, the rope will bend and change direction at the top edge of the shell wall of the shell body, forming a sharp bending angle. The pressure of the top edge of the wall on the inflection point of the rope is relatively large, which is easy to cut the rope fibers and reduce the life of the rope. If the curved part is provided, the rope can be guided softly, and the bending angle formed by the rope is relatively round and blunt. When the rope is pulled, the pressure of the shell wall of the shell body on the bending part of the rope is dispersed and uniform, and the rope fiber is not easy to be cut. , which can protect the life of the rope.

Preferably, the housing body and the plate body are integrally formed. If the shell body and the plate body are combined in an assembly way, there are extremely high requirements on the assembly quality, otherwise it is easy to separate and disintegrate. The integrated molding method not only ensures the structural strength, but also is easier to realize.

Preferably, a plurality of ribs are fixedly connected between the two plate bodies, and the self-locking tooth slots and the auxiliary tooth slots are arranged on the ribs. The rib is the carrier of the self-locking tooth slot and the auxiliary tooth slot, which is convenient for the construction of the self-locking tooth slot and the auxiliary tooth slot.

Preferably, both ends of the rib are welded to the two plate bodies respectively. The ribs are fixed by welding, the structure is simple, and the implementation is easy.

Preferably, the corners of the casing are provided with rounded chamfers. This eliminates sharp points, resulting in a softer feel, preventing rope damage or discomfort during use.

Preferably, the number of housings is one. The descender made of a single shell is suitable for a single rope.

Alternatively, the housings are two and the two housings are connected in parallel. The two shells are connected in parallel to form a double rope descender.

To sum up, the present invention has the following beneficial effects: (1) The present invention can realize that the descender can be operated with one hand when using the descender to descend on the rope, and the descender can be automatically protected immediately when the hand releases the brake rope. In the past, descenders that can be operated with one hand have no protection function, and those with protection functions must be operated with both hands. The present invention can realize automatic protection while being operated with one hand, and is especially suitable for fire rescue and special forces operations. Stopped application. It is also suitable for novice rope players, and has a safer guarantee; (2) During the rope descent, the descender will automatically form a protection mode when the end of the rope is not knotted, so that the descender will run out of rope. (3) Automatic protection can be realized in the situation of double rope descending; (4) The descender can control the braking end of the rope on the ground when the descender loses his ability to move. The application of lowering the descender himself to the ground; (5) Since the present invention has self-protection function and simple control operation, it can be used safely after simple training, and is suitable for high-rise escape.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural schematic diagram of the bottom viewing angle of the present invention;

Fig. 3 is the front view of the present invention;

4 is a schematic structural diagram of the present invention when it is in a self-locking state;

5 is a schematic structural diagram of the present invention when it is in a descending state;

Fig. 6 is the monomer structure schematic diagram of the present invention;

FIG. 7 is a schematic diagram of the double body structure of the present invention.

In the picture:

1- Housing, 101- Housing body, 102- Plate body, 2- Lock hole, 3- Limit friction part, 4- Unlock down friction part, 5- Self-locking tooth slot, 6- Auxiliary tooth slot, 7- Rope access, 8-rib, 9-rope, 10-safety lock.

detailed description

The present invention will be further described below with reference to the specific embodiments of the accompanying drawings.

Example 1:

As shown in Figure 1, Figure 2, Figure 3, and Figure 6, the one-hand control self-protection descender includes a shell 1, so it is a single-rope product with a single structure. The housing 1 is provided with a lock hole 2, a limit friction part 3, an unlocking and descending friction part 4, a self-locking tooth slot 5 and an auxiliary tooth slot 6. The locking part 3 and the unlocking descending friction part 4 are arranged around the lock hole 2 , the self-locking tooth slot 5 and the unlocking descending friction part 4 are located on the left and right sides of the locking hole 2 , and the corners of the housing 1 are provided with smooth chamfers. Between the limit friction part 3 and the unlocking and descending friction part 4, there is a rope entry and exit 7 for threading the rope. The rope entry and exit 7 consists of a rope entry area and a rope exit area. The rope entry area and the rope exit area are not separated. The side close to the limit friction part 3 is the rope entry area, and the side close to the unlocking and descending friction part 4 is the rope exit area. The auxiliary tooth slot 6 and the self-locking tooth slot 5 are located on both sides of the lock hole, and the position of the auxiliary tooth slot 6 is lower than the self-locking tooth slot 5 . The limit friction part 3 and the unlocking and descending friction part 4 are located at the two ends of the top of the casing 1, and the connection line between the highest point of the limit friction part 3 and the middle point of the lock hole 2 forms an angle of 0° with the long axis of the lock hole. The casing 1 includes a casing main body 101 and a pair of plates 102 . The casing main body 101 has a cavity formed by the circumferential closure of the casing wall. The top and bottom of the casing main body 101 are open. , the plate body 102 is fixed on the bottom of the shell wall of the casing main body 101, and the two plate bodies 102 are parallel to each other and are respectively arranged on a pair of opposite surfaces of the casing wall of the casing main body 101. The locking hole 2 includes a first locking hole and a first locking hole. The lock holes, the first lock holes and the first lock holes are provided on the two plate bodies 102 in a one-to-one correspondence. The shell wall of the shell body 101 on the side where the lower friction part 4 is located has a curved surface part, the curved surface part is recessed into the interior of the shell body main body 101, and the outermost edge of the shell wall of the shell body 101 of the curved surface part is lower than the highest point of the curved surface part, unlocking The descending friction portion 4 is located on the curved surface portion. The housing body 101 and the plate body 102 are integrally formed. Three ribs 8 are fixedly connected between the two plate bodies 102 , the self-locking tooth slot 5 is arranged on the two bars 8 on the left side of the lock hole 2 , and the auxiliary tooth slot 6 is arranged on one rib 8 on the right side of the lock hole 2 . superior. Both ends of the rib 8 are welded to the two plate bodies 102 respectively.

When threading the rope 9, the upper end of the rope 9 is fixed on the protection station, and the lower end of the rope 9 is threaded along the rope entry area of the shell, and then passed out along the rope exit area of the casing, and then thread the rope 9 on this sheet. On the hand-controlled descender, the position 20 to 30 centimeters away from the rope-out area is the user's holding part. When in use, the descender puts on the safety belt, and then uses the safety lock 10 to connect the safety belt and the keyhole to ensure safety. Lock 10 is locked. Figure 4 shows the self-locking protection state of the descender after the rope is installed. Initially, after being pulled by the descender's gravity, the main lock hanging on the safety belt will be forced downward, and the limit friction part 3 prevents the descender from falling. Rotate clockwise to unlock the descending friction part 4 to prevent the descender from rotating counterclockwise, so that the rope and descender are parallel to the direction of the long axis of the lock hole, and the main lock moves the rope along the lock hole of the descender under the gravity of the descender. Pulling down in the direction of the long axis, the rope is squeezed by the self-locking tooth slot 5 and the safety lock 10 and stagnates to form a self-locking protection state.

Unlocking and descending friction part 4 basically has very little friction force on the rope in the descending state, but after the descender's hand leaves the rope braking end, the descender will rotate counterclockwise by about 20°, that is, the self-locking diagram shown in the self-locking diagram In the protection state, the unlocking and descending friction part 4 rubs against the rope, increasing the resistance of the descender sliding on the rope, and the safety lock 10 pulls down and squeezes the rope 9 into the self-locking tooth slot 5 under the gravity of the descender to form a self-locking protection state .

Figure 5 shows a schematic diagram of the descender in the descending state. When the descender wants to change from the protection state to the descending state, he only needs to pull down from the hand-held braking end of the rope, and the pulling force of the braking end makes the unlocking and descending friction part 4 be affected. Under the action of leverage, the descender rotates clockwise by about 20°. At the same time, under the influence of tension, the part of the squeezed rope from the safety lock 10 is released from the self-locking tooth slot 5 and rises to the highest point of the lock hole 2. At this time, there is no self-locking tooth slot. 5. Squeeze the braking force of the rope 9, and the upper end of the rope is also disengaged from the unlocking and descending friction part. The rope 9 and the descender are all by hand except for the limit friction part 3, the safety lock 10, and the unlocking and descending friction part 4. There is a small amount of friction resistance Grasp the force of the braking end of the rope 9 to control the speed, you can control it with one hand, and it will turn into a descending state. The pulling force is relatively large at the beginning, which is also a consideration to protect the descender. After pulling down, keep the descending state and keep it The braking force is the same as other descenders, and then you can descend at a relatively fast speed by maintaining a proper grip. If you release the rope 9 or let go of the rope 9 too quickly in the descending state, the descender will turn counterclockwise. Rotate about 20°, that is, the self-locking protection state indicated by the self-locking schematic diagram, to achieve automatic protection.

In the descending state, the limiting friction part 3 makes the rope 9 slightly bend and is under force. When the braking force of the braking end of the rope disappears, that is, the hand may be disconnected from the rope 9. The reaction force of this force and the safety Under the combined action of the gravity of the descender on the lock 10, the descender rotates counterclockwise until the rope 9 becomes straight, and the descender returns to the self-locking protection state. In order to ensure the safety of the descender user and ensure that the rope 9 can be self-locked even when the diameter of the rope 9 is relatively small, since the descender is provided with an unlocking descending friction part 4 on the right side of the upper end position of the rope 9, the descender can be locked when the diameter of the rope is relatively small. It can also enter the self-locking state quickly.

The present invention can realize automatic protection while being operated with one hand, and is especially suitable for use scenarios such as fire rescue and special forces operations that require hands free and pause at any time; If there is no protection knot, it will automatically form a protection mode, so that the descender will not fall off and fall when the rope is exhausted. It has good safety protection performance while improving the convenience of use. is extremely user friendly.

Example 2:

The connection line between the highest point of the limiting friction part 3 and the middle point of the lock hole 2 forms an included angle of 15° with the long axis of the lock hole. Five ribs 8 are fixedly connected between the two plate bodies 102 , the self-locking tooth slot 5 is arranged on the three bars 8 on the left side of the lock hole 2 , and the auxiliary tooth slot 6 is arranged on the two ribs on the right side of the lock hole 2 . Article 8 above. The rest are the same as in Example 1.

Example 3:

The connection line between the highest point of the limit friction part 3 and the middle point of the lock hole 2 forms an included angle of -15° with the long axis of the lock hole.

Example 4:

As shown in FIG. 7 , the shell 1 is a double-body structure, and a double-rope descender is formed by connecting two shells 1 in parallel, and the two shells 1 are integrally formed. The rest are the same as in Example 1.

Claims

A one-handed control self-protection descender, comprising a casing (1), the casing (1) is provided with a locking hole (2), a limit friction part (3), an unlocking descending friction part (4) and a self-locking tooth slot ( 5), between the limit friction part (5) and the unlocking and descending friction part (4), there is a rope inlet and outlet (7) for threading the rope, and it is characterized in that it also includes an auxiliary tooth slot (6), an auxiliary tooth slot. (6) and the self-locking tooth slot (5) are located on both sides of the lock hole, and the position of the auxiliary tooth slot (6) is lower than the self-locking tooth slot (5).
The one-hand control self-protection descender according to claim 1, characterized in that the limiting friction part (3) and the unlocking descending friction part (4) are located at two ends of the top of the casing (1), and the limiting friction part The angle formed between the highest point of (3) and the midpoint of the lock hole (2) and the long axis of the lock hole is within the range of ±15°.
The one-hand control self-protection descender according to claim 1, characterized in that the housing (1) comprises a housing main body (101) and a pair of plate bodies (102), the housing main body (101) having a housing wall formed by a housing wall The cavity formed by the circumferential closure, the top and bottom of the casing main body (101) are open, the inlet and outlet rope openings (7) are located at the top of the casing main body (101), and the plate body (102) is fixed on the casing wall of the casing main body (101). At the bottom, the two plates (102) are parallel and opposite and are respectively arranged on a pair of opposite surfaces of the shell wall of the shell body (101), the locking hole (2) includes a first locking hole and a first locking hole, the first locking hole and the first locking holes are respectively provided on the two plate bodies (102).
The self-protection descender controlled by one hand according to claim 3, characterized in that the shell wall of the housing body (101) on the side where the unlocking descending friction part (4) is located has a curved surface, and the unlocking descending friction part (4) is located on the curved surface Ministry.
The self-protection descender controlled by one hand according to claim 3, characterized in that the housing body (101) and the plate body (102) are integrally formed.
The one-hand control self-protection descender according to claim 3, characterized in that a plurality of ribs (8) are fixedly connected between the two plate bodies (102), the self-locking tooth slot (5), the auxiliary tooth slot ( 6) Set on the ribs (8).
The one-hand control self-protection descender according to claim 6, characterized in that, both ends of the rib (8) are welded to the two plate bodies (102) respectively.
The one-hand control self-protection descender according to claim 1, characterized in that, the corners of the casing (1) are provided with rounded chamfers.
The one-hand control self-protection descender according to any one of claims 1 to 8, characterized in that, the housing (1) is one.
The one-hand control self-protection descender according to any one of claims 1 to 8, characterized in that, there are two casings (1) and the two casings (1) are connected in parallel.