Adjustable anti-stall self-locking parking device

Abstract

An adjusting groove which is concave forwards is formed in the middle of the rear surface of a main body plate, the left side face and the right side face of the adjusting groove are symmetrical arc-shaped side faces, and the adjusting groove is upwards provided with two symmetrical rope inlet channels which are communicated with an upper mounting groove; the adjusting groove is downwards provided with two symmetrical rope outlet channels communicated with the lower mounting groove, the adjusting groove is provided with two resistance friction plates capable of moving left and right, arc-shaped adjusting channels are formed between the two resistance friction plates and the left side face and the right side face of the adjusting groove respectively, and a back plate is fixed to the rear surface of the body plate. The two steel wire ropes are adopted, so that the strength is higher, and the safety is better; the device is completely made of 304 stainless steel, so that the device is not corroded, rusted, aged and blocked, and is long in service life, good in reliability and high in safety; according to the invention, descending and stopping can be controlled, the descending speed can be adjusted, self-locking speed reduction can be realized when the descending speed is too high, and the safety and the reliability are good.

Description

Technical Field

[0001] The invention relates to the field of fire escape equipment, and in particular to an adjustable anti-stall self-locking landing device. Background Art

[0002] At present, most buildings are high-rise buildings. Once a fire occurs in a high-rise building, it is extremely difficult to escape. Therefore, there are descending devices for high-rise building fire escape on the market. The descending devices on the market are mainly descending devices with gear structures such as rotating friction, rotating collision, and gear reduction ratio, which rely on human body gravity to achieve the descending process. However, these descending devices have the following problems when used:

[0003] 1. These descenders only use one steel wire rope, which is not safe and reliable enough.

[0004] 2. These descenders cannot be manually controlled or stopped during the descent, posing a safety hazard.

[0005] 3. The friction plates of these descending retarders are prone to oxidation and failure over time. There is no guarantee that they will not be oxidized during a period of 10, 20 or even 30 years, which will reduce the effectiveness of the friction plates and cause fire escapees to lose their escape protection.

[0006] 4. The rotating structure of these descenders is prone to rust after a long time. There is no guarantee that they will not get stuck due to rust during the period of 10, 20 or even 30 years. The wire rope may slip and descend rapidly, causing fire escapees to lose their escape protection.

[0007] 5. The materials of these descending devices have relatively low corrosion resistance and are prone to rust. There is no guarantee that they will not fail after being placed for 10, 20 or even 30 years, causing fire escapees to lose their escape protection. Summary of the invention

[0008] The invention provides an adjustable anti-stall self-locking descending device, which solves the problem of insufficient reliability of the existing descending device.

[0009] The technical solution of the present invention is achieved in this way:

[0010] An adjustable anti-stall self-locking landing device comprises a main body plate, wherein an upper mounting groove and a lower mounting groove which are concave forward are respectively provided at the upper end and the lower part of the rear surface of the main body plate, an adjustment groove which is concave forward is provided at the middle part of the rear surface of the main body plate, and the left and right side surfaces of the adjustment groove are symmetrical arc-shaped side surfaces, the adjustment groove is provided with two symmetrical rope inlet channels which are connected to the upper mounting groove upward, and the adjustment groove is provided with two symmetrical rope outlet channels which are connected to the lower mounting groove downward, the adjustment groove is provided with two resistance friction plates which can be moved left and right, and arc-shaped adjustment channels are formed between the two resistance friction plates and the left and right side surfaces of the adjustment groove respectively, and a back plate which covers the adjustment groove is fixed to the rear surface of the main body plate; an adjustment hole which is connected to the rear surface of the back plate is provided on the front surface of the main body plate, and the adjustment hole passes through the middle of the adjustment groove, and a corresponding nut is fixed to the front end of the adjustment hole;

[0011] The manual adjustment device is also included, which includes a threaded rod, the threaded rod is threadedly connected in a nut, a hand-screwing device for facilitating the rotation of the threaded rod is fixed to the front end of the threaded rod, a tapered rod is fixed to the back of the threaded rod, the rear end of the tapered rod is smaller than the front end, the tapered rod is located in the adjustment hole, the tapered rod is clamped between two resistance friction plates, the tapered rod is used to push the two resistance friction plates to move to the left and right sides, and the rear end of the tapered rod is connected to a limit device for limiting the forward movement;

[0012] Two symmetrical lower shaft seats are fixed on the left and right sides of the lower mounting groove, a horizontal first adjusting shaft is passed through the lower shaft seats, a first inclined slide groove for cooperating with the first adjusting shaft to move up and down is opened in the middle of the two lower shaft seats, the upper end and the lower end of the first inclined slide groove are respectively a first low hole position end and a first high hole position end, the first low hole position end is closer to the front surface of the lower mounting groove than the first high hole position end, the two side surfaces of the first inclined slide groove pass through the left and right side surfaces of the lower shaft seat, and the two ends of the first adjusting shaft are connected with a first limit device for limiting the first adjusting shaft from disengaging from the first inclined slide groove;

[0013] A control block is provided on the outer sleeve of the middle part of the first adjusting shaft, and two adjusting circular sleeves located on both sides of the control block are also provided on the outer sleeve of the first adjusting shaft, and the two adjusting circular sleeves are located between the two lower shaft seats, and a lower rope passage is formed between the adjusting circular sleeve and the main body plate, and a spring for pushing the control block upward is provided between the front surface of the control block and the front surface of the lower mounting groove, and a spring groove for matching the spring is provided on the front surface of the control block and the front surface of the lower mounting groove, and a second limiting device for limiting the control block from moving backward away from the main body plate is also provided on the control block or the main body plate, and a hand-pulling device for facilitating the hand to pull the control block downward is connected to the lower end of the control block;

[0014] Two symmetrical upper shaft seats are fixed on the left and right sides of the upper mounting groove, a horizontal second adjusting shaft is passed through the upper shaft seats, a second inclined slide groove for cooperating with the second adjusting shaft to move up and down is opened in the middle of the two upper shaft seats, the upper end and the lower end of the second inclined slide groove are respectively a second low hole position end and a second high hole position end, the second low hole position end is closer to the front surface of the upper mounting groove than the second high hole position end, the two side surfaces of the second inclined slide groove pass through the left and right side surfaces of the upper shaft seat, and the two ends of the second adjusting shaft are connected with a third limit device for limiting the second adjusting shaft from disengaging from the second inclined slide groove;

[0015] A self-locking circular sleeve is disposed on the outer sleeve of the second adjusting shaft, and the self-locking circular sleeve is located between the two upper shaft seats, and an upper rope passage is formed between the self-locking circular sleeve and the main plate;

[0016] The utility model also comprises two steel ropes, which pass through an upper rope passage, a rope inlet passage, an arc-shaped adjustment passage, a rope outlet passage and a lower rope passage in sequence.

[0017] Preferably, the main plate and the back plate are both rectangular plates, and the back plate is connected to the main plate by bolts; the lower shaft seat and the upper shaft seat are integrally formed with the main plate; the lower end and left and right sides of the lower mounting groove extend to the edge of the main plate, and the upper end and left and right sides of the upper mounting groove extend to the edge of the main plate; the main plate, back plate, resistance friction plate, manual adjustment device, lower shaft seat, upper shaft seat, first adjustment shaft, second adjustment shaft, control block, adjustment circular sleeve, self-locking circular sleeve, spring and hand-pull device are all made of 304 stainless steel.

[0018] Preferably, the rope inlet channel and the rope outlet channel are both arc-shaped channels or linear channels; and the adjustment hole is a round hole or a threaded hole.

[0019] Preferably, the portion between the two rope inlet channels is a rope inlet spacer, and the portion between the two rope outlet channels is a rope outlet spacer, and a guide groove for guiding the resistance friction plate to move left and right is formed between the rope inlet spacer and the rope outlet spacer.

[0020] Preferably, the surface of the resistance friction plate close to the side of the adjustment groove is an arc-shaped surface, on which is provided a rope groove which is concave inward and cooperates with the wire rope, and the surface of the resistance friction plate away from the side of the adjustment groove is an arc-shaped groove surface, which contacts the conical surface of the conical rod.

[0021] Preferably, the spring grooves on the front surface of the control block and the front surface of the lower mounting groove are respectively centrosymmetrical triangular grooves.

[0022] Preferably, the limiting device includes a cylindrical section coaxially fixed to the rear end of the conical rod, the cylindrical section is provided with a radial pin hole, the cylindrical section is covered with a flat gasket, and the pin hole is inserted with a cotter pin to prevent the flat gasket from detaching from the cylindrical section; or the limiting device is a limiting rod or a limiting circular plate vertically fixed to the rear end of the conical rod.

[0023] Preferably, the first limiting device includes an end cap fixed at one end of the first adjusting shaft, the diameter of the end cap is larger than that of the first adjusting shaft, the other end of the first adjusting shaft is provided with a radial first pin hole, and a first cotter pin is inserted in the first pin hole; the third limiting device includes a third flat washer sleeved on the outside of both ends of the second adjusting shaft, both ends of the second adjusting shaft are provided with radial third pin holes, a third cotter pin is inserted in the third pin hole, and the third cotter pin is farther away from the upper shaft seat than the third flat washer.

[0024] Preferably, the second limiting device includes an L-shaped plate, which is fixed to the front surface of the control block. The L-shaped plate and the control block form a limiting groove opening upward, and the lower end of the main board body is located in the limiting groove; the hand-pulling device is a pull ring or an inverted T-shaped pull rod; and the hand-rotating device is a butterfly-shaped handle or a handwheel.

[0025] Preferably, a safety belt hanging hole is provided at the lower portion of the main body plate.

[0026] Beneficial effects of the present invention:

[0027] 1. The present invention adopts two steel wire ropes, which have higher strength and better safety. 2. The present invention adopts 304 stainless steel material entirely, which will not corrode, rust, age or jam even if left for a long time, and has a long service life, ensuring that the product can be safely used after being placed for 10, 20 or even 30 years, with good reliability and high safety. 3. The present invention has a simple structure, and each component has high reliability. It does not adopt traditional gears and other structures with low reliability. It can be placed for a long time, has a long service life, good reliability and high safety. 4. The present invention can rotate the manual adjustment device to make the resistance friction plate move horizontally, and adjust the tightness of the arc-shaped adjustment channel clamping the steel wire rope, so as to achieve the purpose of manually adjusting the descent speed. 5. When the hand-pull device of the present invention is pulled downward, the control block, the first adjusting shaft and the adjusting circular sleeve are driven to move obliquely downward along the first inclined slide groove. Because the first low-hole end is closer to the front surface of the lower mounting groove than the first high-hole end, the adjusting circular sleeve is away from the wire rope, that is, the wire rope is loosened, and the device descends. When it is to stop, the hand-pull device is released, and the control block moves upward obliquely under the action of the spring, driving the first adjusting shaft and the adjusting circular sleeve to move upward obliquely, and the adjusting circular sleeve approaches the wire rope, pressing the wire rope, and the device stops descending, thereby achieving the purpose of manual control. 6. When the device of the present invention descends at a normal speed, the second adjusting shaft is at the second highest hole position end at the lower end under the action of its own weight and the weight of the self-locking circular sleeve. The self-locking circular sleeve contacts the wire rope and only rotates due to the friction of the wire rope without any effect. When a fire occurs and people are nervous, causing the device to descend too quickly, the wire rope not only drives the self-locking circular sleeve to rotate, but also drives the self-locking circular sleeve and the second adjusting shaft to move upward along the second inclined slide groove. The self-locking circular sleeve approaches the wire rope and presses the wire rope, achieving the self-locking and anti-stall effect to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0030] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0031] Figure 3 It is a left-side structural schematic diagram of the present invention;

[0032] Figure 4 for Figure 2 Schematic diagram of the structure after removing the back panel;

[0033] Figure 5 It is a structural schematic diagram of the manual adjustment device in the present invention;

[0034] Figure 6 It is a left-side structural schematic diagram of the main body plate in the present invention;

[0035] Figure 7 It is a rear view structural schematic diagram of the main body plate in the present invention;

[0036] Figure 8 It is a structural schematic diagram of the resistance friction plate in the present invention;

[0037] Fig. 9 It is a structural schematic diagram of the control block in the present invention.

[0038] In the figure:

[0039] Main body plate 1, upper mounting groove 11, lower mounting groove 12, adjustment groove 13, arc-shaped side surface 131, guide slide groove 132, rope inlet channel 14, rope outlet channel 15, arc-shaped adjustment channel 16, adjustment hole 17, nut 18, rope inlet spacer 19, rope outlet spacer 10;

[0040] Resistance friction plate 2, arc surface 21, arc groove surface 22, rope groove 23;

[0041] Back plate 3, bolt 31;

[0042] Manual adjustment device 4, threaded rod 41, hand-twisting device 42, tapered rod 43, limiting device 44, cylindrical section 441, flat washer 442, cotter pin 443;

[0043] Lower shaft seat 51, first adjusting shaft 52, first inclined slide groove 53, first low hole end 531, first high hole end 532, first limit device 54, end 541, first cotter pin 542, control block 55, L-shaped plate 551, limit groove 552, adjusting circular sleeve 56, spring 57, spring groove 58, hand-pull device 59;

[0044] Upper shaft seat 61, second adjusting shaft 62, second inclined slide groove 63, second low hole end 631, second high hole end 632, self-locking round sleeve 64, third limiting device 65, third flat washer 651, third cotter pin 652;

[0045] Wire rope 7;

[0046] Seat belt hanging hole 8. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] Reference Figure 1-9 , an adjustable anti-stall self-locking landing device, comprising a main body plate 1, an upper mounting groove 11 and a lower mounting groove 12 which are concave forward are respectively provided at the upper end and the lower part of the rear surface of the main body plate 1, an adjustment groove 13 which is concave forward is provided in the middle part of the rear surface of the main body plate 1, the left and right side surfaces of the adjustment groove 13 are symmetrical arc-shaped side surfaces 131, the adjustment groove 13 is provided with two symmetrical rope inlet channels 14 which are connected to the upper mounting groove upward, and the adjustment groove 13 is provided with two symmetrical rope outlet channels 15 which are connected to the lower mounting groove 12 downward, the adjustment groove 13 is provided with two resistance friction plates 2 which can move left and right, and arc-shaped adjustment channels 16 are formed between the two resistance friction plates 2 and the left and right side surfaces of the adjustment groove 13 respectively, and a back plate 3 covering the adjustment groove is fixed to the rear surface of the main body plate 1; an adjustment hole 17 which is provided on the front surface of the main body plate 1 and leads to the rear surface of the back plate, the adjustment hole 17 passes through the middle of the adjustment groove 13, and a corresponding nut 18 is fixed to the front end of the adjustment hole 17;

[0049] It also includes a manual adjustment device 4, which includes a threaded rod 41, which is threadedly connected in the nut 18, a hand-screwing device 42 for facilitating the rotation of the threaded rod 41 is fixed at the front end of the threaded rod 41, a tapered rod 43 is fixed at the back of the threaded rod 41, the rear end of the tapered rod 43 is smaller than the front end, the tapered rod 43 is located in the adjustment hole 17, the tapered rod 43 is sandwiched between the two resistance friction plates 2, the tapered rod 43 is used to push the two resistance friction plates 2 to move to the left and right sides, and the rear end of the tapered rod 43 is connected to a limit device 44 for limiting the forward movement;

[0050] Two symmetrical lower shaft seats 51 are fixed on the left and right sides of the lower mounting groove 12, a horizontal first adjustment shaft 52 is passed through the lower shaft seats 51, a first inclined slide groove 53 for cooperating with the first adjustment shaft 52 to move up and down is opened in the middle of the two lower shaft seats 51, the upper end and the lower end of the first inclined slide groove 53 are respectively a first low hole end 531 and a first high hole end 532, the first low hole end 531 is closer to the front surface of the lower mounting groove 12 than the first high hole end 532, the two side surfaces of the first inclined slide groove 53 pass through the left and right side surfaces of the lower shaft seat 51, and the two ends of the first adjustment shaft 52 are connected with a first limit device 54 that limits the first adjustment shaft 52 from disengaging from the first inclined slide groove 53;

[0051] A control block 55 is provided on the outer sleeve of the middle part of the first adjusting shaft 52, and two adjusting circular sleeves 56 located on both sides of the control block are also provided on the outer sleeve of the first adjusting shaft 52, and the two adjusting circular sleeves 56 are located between the two lower shaft seats 51, and a lower rope passage is formed between the adjusting circular sleeve 56 and the main body plate 1, and a spring 57 for pushing the control block upward is provided between the front surface of the control block 55 and the front surface of the lower mounting groove, and a spring groove 58 for matching the spring is provided on the front surface of the control block 55 and the front surface of the lower mounting groove 12, and a second limiting device for limiting the control block 55 from moving backward away from the main body plate 1 is also provided on the control block 55 or the main body plate 1, and a hand-pulling device 59 for facilitating the hand to pull the control block 55 downward is connected to the lower end of the control block 55;

[0052] Two symmetrical upper shaft seats 61 are fixed on the left and right sides of the upper mounting groove 11, and a horizontal second adjustment shaft 62 is passed through the upper shaft seats 61. A second inclined slide groove 63 for cooperating with the second adjustment shaft 62 to move up and down is opened in the middle of the two upper shaft seats 61. The upper end and the lower end of the second inclined slide groove 63 are respectively a second low hole end 631 and a second high hole end 632. The second low hole end 631 is closer to the front surface of the upper mounting groove 11 than the second high hole end 632. The two side surfaces of the second inclined slide groove 63 pass through the left and right side surfaces of the upper shaft seat. The two ends of the second adjustment shaft 62 are connected with a third limit device 65 for limiting the second adjustment shaft 62 from disengaging from the second inclined slide groove 63.

[0053] A self-locking circular sleeve 64 is disposed on the outer cover of the second adjusting shaft 62. The self-locking circular sleeve 64 is located between the two upper shaft seats 61. An upper rope passage is formed between the self-locking circular sleeve 64 and the main plate 1.

[0054] The utility model also comprises two steel wire ropes 7, which pass through the upper rope passage, the rope inlet passage 14, the arc-shaped adjustment passage 16, the rope outlet passage 15 and the lower rope passage in sequence.

[0055] The upper ends of the two steel wire ropes 7 are fixed on the building. The upper ends of the two steel wire ropes 7 can also be connected together, or one steel wire rope 7 can be folded into two.

[0056] The outer circumferential surfaces of the adjusting circular sleeve 56 and the self-locking circular sleeve 64 are frosted surfaces, not smooth surfaces, to ensure that there is a certain friction force when contacting with the wire rope.

[0057] As a preferred embodiment, the main plate 1 and the back plate 3 are both rectangular plates, and the back plate 3 is connected to the main plate 1 by bolts 31; the lower shaft seat 51 and the upper shaft seat 61 are integrally formed with the main plate 1; the lower end and the left and right sides of the lower mounting groove 12 extend to the edge of the main plate 1, and the upper end and the left and right sides of the upper mounting groove 11 extend to the edge of the main plate 1; the main plate 1, the back plate 3, the resistance friction plate 2, the manual adjustment device 4, the lower shaft seat 51, the upper shaft seat 61, the first adjustment shaft 52, the second adjustment shaft 62, the control block 55, the adjustment circular sleeve 56, the self-locking circular sleeve 64, the spring 57 and the hand-pull device 59 are all made of 304 stainless steel.

[0058] As a preferred embodiment, the rope inlet channel 14 and the rope outlet channel 15 are both arc-shaped channels or linear channels; and the adjustment hole 17 is a round hole or a threaded hole.

[0059] As a preferred embodiment, the portion between the two rope inlet channels 14 is a rope inlet spacer 19, and the portion between the two rope outlet channels 15 is a rope outlet spacer 10. A guide groove 132 is formed between the rope inlet spacer 19 and the rope outlet spacer 10 for guiding the resistance friction plate 2 to move left and right.

[0060] As a preferred embodiment, the side surface of the resistance friction plate 2 close to the adjustment groove 13 is an arc surface 21, and a rope groove is provided on the arc surface, which is concave inward and matches the steel wire rope. The side surface of the resistance friction plate 2 away from the adjustment groove is an arc groove surface 22, and the arc groove surface 22 contacts the conical surface of the cone rod 43. The left and right sides of the adjustment groove 13 are symmetrical arc side surfaces 131, which are symmetrical physical curves, and cooperate with the resistance friction plate 2 to form an arc adjustment channel 16. By adjusting the left and right movement of the resistance friction plate 2, the tightness of the steel wire rope can be adjusted to achieve the speed adjustment of the device descent. The physical method is adopted, there will be no failure, and the reliability is good. The rope groove can increase the contact area with the steel wire rope to increase the friction force and reliability.

[0061] As a preferred embodiment, the spring groove 58 on the front surface of the control block 55 and the front surface of the lower mounting groove are respectively centrosymmetrical triangular grooves.

[0062] As a preferred embodiment, the limiting device 44 includes a cylindrical section 441 coaxially fixed to the rear end of the conical rod 43, the cylindrical section 441 is provided with a radial pin hole, the cylindrical section is covered with a flat gasket 442, and the pin hole is inserted with a cotter pin 443 to prevent the flat gasket 442 from detaching from the cylindrical section; or the limiting device 44 is a limiting rod or a limiting circular plate vertically fixed to the rear end of the conical rod 43.

[0063] As a preferred embodiment, the first limiting device 54 includes an end head 541 fixed at one end of the first adjusting shaft 52, the diameter of the end head 541 is larger than the first adjusting shaft 52, and the other end of the first adjusting shaft 52 is provided with a radial first pin hole, and a first opening pin 542 is inserted in the first pin hole; the third limiting device 65 includes a third flat washer 651 which is sleeved on the outside of both ends of the second adjusting shaft 62, and both ends of the second adjusting shaft 62 are provided with radial third pin holes, and a third opening pin 652 is inserted in the third pin hole, and the third opening pin 652 is farther away from the upper shaft seat 61 than the third flat washer 651.

[0064] As a preferred embodiment, the second limiting device includes an L-shaped plate 551, which is fixed on the front surface of the control block 55. The L-shaped plate 551 and the control block 55 form a limiting groove 552 that opens upward, and the lower end of the main board body 1 is located in the limiting groove 552; the hand-pulling device 59 is a pull ring or an inverted T-shaped pull rod; the hand-rotating device 42 is a butterfly-shaped handle or a handwheel.

[0065] As a preferred embodiment, a safety belt hanging hole 8 is provided at the lower part of the main body plate 1. There are two safety belt hanging holes 8, which are symmetrically arranged to increase the reliability of the safety belt of the escapee.

[0066] Before using the present invention, the hand-spinning device 42 can be rotated to make the threaded rod 41 drive the tapered rod 43 to move forward and backward. When the tapered rod 43 moves backward, the resistance friction plate 2 can be squeezed open to make the resistance friction plate 2 move to both sides, so that the arc-shaped adjustment channel 16 becomes narrower, the wire rope 7 is clamped more tightly, and the speed during descent is reduced. When the hand-spinning device 42 is rotated in the opposite direction, the opposite is true, thereby achieving the purpose of manually adjusting the descent speed. It has been adjusted before normal use. During use, if a special state occurs, it can be manually adjusted to achieve the purpose of manually adjusting the descent speed.

[0067] When encountering a fire, if you need to escape, wear the safety belt, hang the upper end of the safety belt in the safety belt hanging hole 8, and pull the hand-pulling device 59 downward. The hand-pulling device 59 drives the control block 55, the first adjustment shaft 52 and the adjustment circular sleeve 56 to move downward along the first inclined slide groove 53, and move to the first high hole position end 532. Because the first high hole position end 532 is farther away from the front surface of the lower installation groove 12 than the first low hole position end 531, the adjustment circular sleeve 56 is away from the wire rope 7, that is, the wire rope 7 is loosened, and the device descends and brings people down to the ground, and escapes safely. When it is time to stop in the middle, release the hand-pulling device 59, and the control block 55 moves upward under the action of the spring 57, driving the first adjustment shaft 52 and the adjustment circular sleeve 56 to move upward and move to the first low hole position end 531. The adjustment circular sleeve 56 approaches the wire rope 7, compresses the wire rope 7, and the device stops descending, achieving the purpose of manual control.

[0068] When the device of the present invention descends at a normal speed, the second adjusting shaft 62 is at the second highest hole end 632 at the lower end under the action of its own weight and the weight of the self-locking circular sleeve 64, and the self-locking circular sleeve 64 contacts the steel wire rope 7, and only rotates under the friction of the steel wire rope 7, and does not work. When people want to escape from a fire, they are nervous, causing the device to descend too fast. The steel wire rope 7 not only drives the self-locking circular sleeve 64 to rotate, but also drives the self-locking circular sleeve 64 and the second adjusting shaft 62 to move upward along the second inclined chute 63 under the action of friction. The self-locking circular sleeve 64 approaches the steel wire rope 7, compresses the steel wire rope 7, and decelerates the device, achieving the effect of self-locking and anti-stall, ensuring safety. To unlock, press down the two ends of the second adjusting shaft 62 with your thumbs.

[0069] The present invention adopts two steel wire ropes, which have higher strength and better safety. The present invention adopts 304 stainless steel material, which will not corrode, rust, age or jam even if placed for a long time, and has a long service life, ensuring that the product can be safely used after being placed for 10, 20 or even 30 years, with good reliability and high safety. The present invention has a simple structure, and each component has high reliability. It does not adopt traditional gears and other structures with low reliability, and can be placed for a long time, with a long service life, good reliability and high safety.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable anti-stall self-locking landing device, characterized in that: The utility model comprises a main body plate, wherein an upper mounting groove and a lower mounting groove which are concave forward are respectively provided at the upper end and the lower part of the rear surface of the main body plate, an adjustment groove which is concave forward is provided at the middle part of the rear surface of the main body plate, and the left and right side surfaces of the adjustment groove are symmetrical arc-shaped side surfaces, the adjustment groove is provided with two symmetrical rope inlet channels which are connected to the upper mounting groove upward, and the adjustment groove is provided with two symmetrical rope outlet channels which are connected to the lower mounting groove downward, the adjustment groove is provided with two resistance friction plates which can be moved left and right, and arc-shaped adjustment channels are formed between the two resistance friction plates and the left and right side surfaces of the adjustment groove respectively, and a back plate which covers the adjustment groove is fixed to the rear surface of the main body plate; An adjustment hole leading to the rear surface of the back plate is opened on the front surface of the main body plate, the adjustment hole passes through the middle of the adjustment slot, and a corresponding nut is fixed at the front end of the adjustment hole; The manual adjustment device is also included, which includes a threaded rod, the threaded rod is threadedly connected in a nut, a hand-screwing device for facilitating the rotation of the threaded rod is fixed to the front end of the threaded rod, a tapered rod is fixed to the back of the threaded rod, the rear end of the tapered rod is smaller than the front end, the tapered rod is located in the adjustment hole, the tapered rod is clamped between two resistance friction plates, the tapered rod is used to push the two resistance friction plates to move to the left and right sides, and the rear end of the tapered rod is connected to a limit device for limiting the forward movement; Two symmetrical lower shaft seats are fixed on the left and right sides of the lower mounting groove, a horizontal first adjusting shaft is passed through the lower shaft seats, a first inclined slide groove for cooperating with the first adjusting shaft to move up and down is opened in the middle of the two lower shaft seats, the upper end and the lower end of the first inclined slide groove are respectively a first low hole position end and a first high hole position end, the first low hole position end is closer to the front surface of the lower mounting groove than the first high hole position end, the two side surfaces of the first inclined slide groove pass through the left and right side surfaces of the lower shaft seat, and the two ends of the first adjusting shaft are connected with a first limit device for limiting the first adjusting shaft from disengaging from the first inclined slide groove; A control block is provided on the outer sleeve of the middle part of the first adjusting shaft, and two adjusting circular sleeves located on both sides of the control block are also provided on the outer sleeve of the first adjusting shaft, and the two adjusting circular sleeves are located between the two lower shaft seats, and a lower rope passage is formed between the adjusting circular sleeve and the main body plate, and a spring for pushing the control block upward is provided between the front surface of the control block and the front surface of the lower mounting groove, and a spring groove for matching the spring is provided on the front surface of the control block and the front surface of the lower mounting groove, and a second limiting device for limiting the control block from moving backward away from the main body plate is also provided on the control block or the main body plate, and a hand-pulling device for facilitating the hand to pull the control block downward is connected to the lower end of the control block; Two symmetrical upper shaft seats are fixed on the left and right sides of the upper mounting groove, a horizontal second adjusting shaft is passed through the upper shaft seats, a second inclined slide groove for cooperating with the second adjusting shaft to move up and down is opened in the middle of the two upper shaft seats, the upper end and the lower end of the second inclined slide groove are respectively a second low hole position end and a second high hole position end, the second low hole position end is closer to the front surface of the upper mounting groove than the second high hole position end, the two side surfaces of the second inclined slide groove pass through the left and right side surfaces of the upper shaft seat, and the two ends of the second adjusting shaft are connected with a third limit device for limiting the second adjusting shaft from disengaging from the second inclined slide groove; A self-locking circular sleeve is disposed on the outer sleeve of the second adjusting shaft, and the self-locking circular sleeve is located between the two upper shaft seats, and an upper rope passage is formed between the self-locking circular sleeve and the main plate; The utility model also comprises two steel ropes, which pass through an upper rope passage, a rope inlet passage, an arc-shaped adjustment passage, a rope outlet passage and a lower rope passage in sequence.

2. The adjustable anti-stall self-locking landing device according to claim 1, characterized in that: The main plate and the back plate are both rectangular plates, and the back plate is connected to the main plate by bolts; the lower shaft seat and the upper shaft seat are integrally formed with the main plate; the lower end and left and right sides of the lower mounting groove extend to the edge of the main plate, and the upper end and left and right sides of the upper mounting groove extend to the edge of the main plate; the main plate, back plate, resistance friction plate, manual adjustment device, lower shaft seat, upper shaft seat, first adjustment shaft, second adjustment shaft, control block, adjustment circular sleeve, self-locking circular sleeve, spring and hand-pull device are all made of 304 stainless steel.

3. The adjustable anti-stall self-locking landing device according to claim 1, characterized in that: The rope inlet channel and the rope outlet channel are both arc-shaped channels or linear channels; the adjustment hole is a round hole or a threaded hole.

4. The adjustable anti-stall self-locking landing device according to claim 1, characterized in that: The portion between the two rope inlet channels is a rope inlet spacer, and the portion between the two rope outlet channels is a rope outlet spacer. A guide slot for guiding the resistance friction plate to move left and right is formed between the rope inlet spacer and the rope outlet spacer.

5. The adjustable anti-stall self-locking landing device according to claim 1, characterized in that: The surface of the resistance friction plate close to the side of the adjustment groove is an arcuate surface, on which a rope groove is provided which is concave inward and cooperates with the wire rope. The surface of the resistance friction plate away from the side of the adjustment groove is an arcuate groove surface, which contacts the conical surface of the cone rod.

6. The adjustable anti-stall self-locking landing device according to claim 1, characterized in that: The spring grooves on the front surface of the control block and the front surface of the lower mounting groove are respectively centrosymmetrical triangular grooves.

7. The adjustable anti-stall self-locking landing device according to claim 1, characterized in that: The limiting device includes a coaxial cylindrical section fixed to the rear end of the conical rod, a radial pin hole is opened on the cylindrical section, a flat gasket is covered on the cylindrical section, and a cotter pin is inserted in the pin hole to prevent the flat gasket from detaching from the cylindrical section; or the limiting device is a limiting rod or a limiting circular plate vertically fixed to the rear end of the conical rod.

8. The adjustable anti-stall self-locking landing device according to claim 1, characterized in that: The first limiting device includes an end head fixed at one end of the first adjusting shaft, the diameter of the end head is larger than the first adjusting shaft, the other end of the first adjusting shaft is provided with a radial first pin hole, and a first cotter pin is inserted in the first pin hole; the third limiting device includes a third flat washer sleeved on the outside of both ends of the second adjusting shaft, both ends of the second adjusting shaft are provided with radial third pin holes, a third cotter pin is inserted in the third pin hole, and the third cotter pin is farther away from the upper shaft seat than the third flat washer.

9. The adjustable anti-stall self-locking landing device according to claim 1, characterized in that: The second limiting device includes an L-shaped plate, which is fixed on the front surface of the control block. The L-shaped plate and the control block form a limiting groove opening upward, and the lower end of the main board body is located in the limiting groove; the hand-pulling device is a pull ring or an inverted T-shaped pull rod; the hand-rotating device is a butterfly-shaped handle or a handwheel.

10. The adjustable anti-stall self-locking landing device according to any one of claims 1 to 9, characterized in that: A safety belt hanging hole is provided at the lower part of the main body plate.

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