CN117509364A - Door knife device - Google Patents

Abstract

The invention discloses a door knife device, and a left knife arm, a right knife arm, a swing arm and a lock hook which are arranged on a door knife bottom plate, wherein the swing arm is rotationally connected with the door knife bottom plate and the left knife arm and the right knife arm, the lock hook is positioned on the side part of the door knife bottom plate and is rotationally connected with the door knife bottom plate, and the lock hook is matched with a fixed hook on a sedan door; the door knife device further comprises a swinging rod and a traction rope, one end of the traction rope is connected with the lock hook, the other end of the traction rope is connected with the door knife bottom plate, one end of the swinging rod is rotatably connected with the swinging arm, and the other end of the swinging rod is slidably connected with the traction rope. According to the door knife device, through the arrangement of the swing rod linked with the swing arm and the traction rope linked with the lock hook, the requirements of various door-pulling working conditions in national standards are met, the structure of the door knife device is simplified, and the use safety and reliability are improved.

Description

Door knife device

Technical Field

The invention relates to the technical field of elevators, in particular to a door vane device of an elevator.

Background

In order to meet the requirements of GB7588.1/.2 on various door-pulling working conditions of flat floors and non-flat floors, the door knives of some elevator car door locks in the prior art are usually provided with knife arm floating connecting rods or pulling sheets, the number of the connecting rods is at least three, even the number of bearings is more than twenty, and meanwhile, the number of the bearings is also increased by the aid of springs and other parts, so that the door knives of the elevator car door locks are more and more complex in structure, and the reliability and the adjustability of the door knives are greatly reduced. In addition, the spring is added, other risks are brought, for example, when an elevator is used for flat floor rescue, a door knife of a car door lock can be unfolded or contracted due to the elastic force of the spring after the elevator is powered off, and when the elevator moves to a position close to a flat floor, a door knife arm can collide with a door ball of the car door lock, so that parts are damaged.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the elevator door vane device, which can simplify the structure of the door vane device and improve the use reliability of the door vane device while meeting the national standard on various door-pulling working conditions.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the door knife device comprises a door knife bottom plate, a left knife arm, a right knife arm, a swing arm and a lock hook, wherein the left knife arm, the right knife arm, the swing arm and the lock hook are arranged on the door knife bottom plate;

the door knife device further comprises a swing rod and a traction rope, one end of the traction rope is connected with the lock hook, and the other end of the traction rope is connected with the door knife bottom plate; one end of the swing rod is rotationally connected with the swing arm, and the other end of the swing rod is in sliding connection with the traction rope. The left cutter arm and/or the right cutter arm are/is used for driving the swing arm to rotate or driving the left cutter arm and/or the right cutter arm to float.

Through improving a plurality of complicated connecting rods in the door vane among the prior art into a pendulum rod to set up with pendulum rod and latch hook matched with haulage rope, can drive the swing arm through the float of left knife arm or right knife arm and rotate, and then drive the pendulum rod and rotate, the pendulum rod rotates and can upwards hook the haulage rope, drives the latch hook and upwards lifts, makes door vane device unblock, can take off the door. The floating acting force of the left cutter arm or the right cutter arm is derived from the acting force of the left cutter arm or the right cutter arm in the horizontal direction when the gate ball touches the left cutter arm or the right cutter arm when the landing door or the car door is taken off. Specifically, when the elevator moves to the leveling position, because the left cutter arm and the right cutter arm clamp two gate balls or two gate balls are located in the length range of the left cutter arm and the right cutter arm, at the moment, when a person in the car lifts the landing door, the gate ball on the left side can touch the left cutter arm and apply the acting force in the horizontal direction to the left cutter arm to enable the left cutter arm to float, the left cutter arm floats to drive the swing arm to rotate, then the swing rod is driven to rotate, the swing rod rotates to hook the traction rope upwards, finally the lock hook is driven to lift, the separation of the lock hook and the fixed hook is realized, and the gate knife device is unlocked. When maintenance personnel take off the door outside the hall, the gate ball on the right can touch the right knife arm and apply the effort of right knife arm horizontal direction to make it float, and the float of right knife arm also can drive the swing arm and rotate, and then drive the pendulum rod and rotate, the pendulum rod rotates and can upwards hook the haulage rope, finally drives the latch hook to lift up, realizes the separation of latch hook and fixed hook, and gate knife device also can unblock. When the elevator runs to a non-flat floor position, the left cutter arm and the right cutter arm are separated from two gate balls on the landing door, so that no matter the landing door or the car door is lifted, the gate balls cannot apply horizontal acting force to the left cutter arm or the right cutter arm because the left cutter arm or the right cutter arm cannot touch the gate balls, the left cutter arm or the right cutter arm cannot float, and the lock hook still keeps a state locked with the fixed hook.

According to some preferred embodiments of the invention, the swing arms are provided with two, and the swing arms comprise an upper swing arm and a lower swing arm, and the upper end part of the upper swing arm is rotatably connected with the lower end part of the swing arm. In some embodiments of the present invention, two side portions of the upper swing arm are respectively connected with the left cutter arm and the right cutter arm in a rotating manner through two upper swing arm rotating shafts, two side portions of the lower swing arm are respectively connected with the left cutter arm and the right cutter arm in a rotating manner through two lower swing arm rotating shafts, and the upper swing arm rotating shafts and the lower swing arm rotating shafts which are positioned on the same side are positioned on the same vertical direction. The left cutter arm and the right cutter arm are hinged with the upper swing arm and the lower swing arm through two upper swing arm rotating shafts and two lower swing arm rotating shafts respectively to form a parallelogram.

According to some preferred embodiments of the present invention, a roller is disposed at an end of the swing arm, which is far away from the swing arm, and a wheel groove for sliding the traction rope is disposed on the roller, and the wheel groove and the traction rope are located in the same plane. The idler wheels are positioned below the traction ropes, so that the traction ropes can be hooked upwards when the swing rods rotate upwards.

According to some preferred embodiments of the present invention, a fixing block is disposed on the latch hook, and one end of the hauling cable is connected to the fixing block.

According to some preferred embodiments of the present invention, the guide bar comprises a sliding block and a guide bar, wherein the sliding block is connected with the guide bar in a sliding manner along the length direction of the guide bar; the swing rod is rotationally connected with the sliding block.

According to some preferred embodiments of the present invention, the door hinge further comprises a rotating rod and a fixed plate, wherein the rotating rod is rotatably connected with the door hinge base plate, and the fixed plate is fixedly connected with the door hinge hanging plate; the utility model discloses a door knife, including fixed plate, pivoted lever is kept away from the notch has been seted up to the one end of fixed plate, pivoted lever is close to the one end of fixed plate is provided with the extension, pivoted lever has been seted up the tip of notch is located between the surface of door knife bottom plate and the internal surface of slider.

According to some preferred embodiments of the present invention, the sliding block is provided with a pin shaft penetrating through the thickness direction of the sliding block, the pin shaft includes a first shaft portion and a second shaft portion, the first shaft portion is fixedly connected with a belt fixing piece on a synchronous belt, and the synchronous belt is used for driving the sliding block to slide along the length direction of the guide rod; the second shaft portion is engaged with the notch. In some embodiments of the invention, the pin shaft on the slider is clamped with the notch of the rotating rod and fixedly connected with the belt fixing piece on the synchronous belt, so that the stress of the pin shaft is better, and when the notch is not clamped with the pin shaft, the pin shaft is driven to move along with the transmission of the synchronous belt, so that the slider is driven to move along the length direction of the guide rod. In addition, when the slider moves to the notch and is clamped with the pin shaft, the slider can not move on the guide rod continuously, and the synchronous belt at the moment is used for driving the door knife device and the door machine hanging plate to move along the length direction of the door machine guide rail.

According to some preferred embodiments of the present invention, when the slider is located at an end of the guide rod away from the fixed plate, the extension portion is away from the fixed plate or the extension portion is contacted with the fixed plate, and the notch is clamped with the second shaft portion; when the sliding block is positioned at one end of the guide rod, which is close to the fixed plate, the extending part is abutted with the fixed plate, and the notch is separated from the second shaft part. Specifically, when the elevator is closed in place, the slider is located on the rightmost side of the guide rod, namely on one end of the guide rod, which is close to the fixed plate, at the moment, the extending part of the rotating rod is abutted to the fixed plate, the notch of the rotating rod is not clamped with the second shaft part, the swing rod rotationally connected with the slider falls down, the traction rope is not hooked, the lock hook is clamped in the fixed hook, the door knife is locked, and the elevator cannot be opened. When the elevator gradually opens the door from a door closing state (the lift car is positioned on a flat floor), the transmission of the synchronous belt drives the sliding block to move from the right side to the left side of the guide rod until the notch is clamped with the second shaft part, at the moment, the sliding block does not move any more, and in the process that the sliding block moves from right to left, the swing rod is driven to rotate, so that the swing rod hooks the traction rope upwards, further the lock hook is lifted upwards, the lock hook is separated from the fixed hook, and the door knife is unlocked; the swing rod can also drive the upper swing arm to rotate, and then drive the left knife arm and the right knife arm to move towards the direction that is close to each other until the left knife arm and the right knife arm clamp the gate ball, so that the layer door lock is unlocked. Then, under the state that the slider can not continue to slide, the hold-in range can drive whole door sword device to left movement, and in this process, because left knife arm and right knife arm press from both sides tightly with the gate ball, layer door and sedan-chair door can open gradually simultaneously until the door is in place. When the elevator is gradually closed by a door opening state, the whole door knife device is driven to gradually move rightward through the transmission of the synchronous belt, at the moment, the sliding block and the notch are still in a clamping state, when the door knife device moves to the position that the extending part of the rotating rod touches the fixed plate and is in butt joint with the fixed plate, the end part of the rotating rod provided with the notch can be lifted upwards, so that the notch cannot be continuously clamped with the second shaft part, at the moment, under the continuous transmission action of the synchronous belt, the sliding block can be driven to move from the left side to the right side of the guide rod, the movement of the sliding block can drive the swinging rod to rotate, the end part connected with the swinging rod and the traction rope gradually falls, and therefore the locking hook falls down and is locked with the fixed hook, and the elevator is closed in place. The swing rod rotates to drive the upper swing arm to rotate, so that the left cutter arm and the right cutter arm are driven to move in the direction away from each other until the left cutter arm and the right cutter arm loosen the gate ball. The elevator car at this point can be run upwards or downwards.

According to some preferred embodiments of the present invention, a notch matched with the rotating rod is formed at the upper end of one side of the sliding block, which is close to the fixed plate. The notch is arranged to facilitate the placement of the swing rod, especially when the notch of the rotating rod is clamped with the second shaft part of the pin shaft, if the notch is not arranged, the end part of the rotating rod, which is provided with the notch, can be tilted upwards due to the height of the sliding block, so that the notch is difficult to be clamped with the second shaft part effectively.

According to some preferred embodiments of the present invention, a first rotating shaft is disposed between the upper swing arm and the door knife bottom plate, a second rotating shaft is disposed between the lower swing arm and the door knife bottom plate, the upper swing arm is rotatably connected with the door knife bottom plate through the first rotating shaft, the lower swing arm is rotatably connected with the door knife bottom plate through the second rotating shaft, and the first rotating shaft and the second rotating shaft are located in the same vertical direction.

Compared with the prior art, the invention has the following advantages: according to the door knife device, through the arrangement of the swing rod which is in linkage with the swing arm and the traction rope which is in linkage with the lock hook, when a door is pulled, the swing arm is driven to rotate through the floating of the left knife arm or the right knife arm, and then the swing rod is driven to rotate, the traction rope is hooked upwards by the rotation of the swing rod, so that the door knife device is lifted upwards, the door knife device is unlocked, the requirements of various door pulling working conditions in national standards are met, the structure of the door knife device is simplified, and the safety and the reliability of use are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of the door vane device of the elevator of the preferred embodiment of the present invention when the elevator is closed in place and in a non-flat position;

fig. 2 is a schematic view of the door vane device in the elevator door closed in place and in the flat position according to the preferred embodiment of the present invention;

fig. 3 is a schematic view of the door vane device of the elevator in the preferred embodiment of the present invention when the elevator door is in place and in the flat landing position;

fig. 4 is a schematic structural view of a door vane device when an elevator is closed in place and a rescue worker takes off the door in a car through a rescue rope in a preferred embodiment of the invention;

FIG. 5 is a schematic view of a slider according to a preferred embodiment of the present invention;

FIG. 6 is a schematic view of a latch hook according to a preferred embodiment of the present invention;

FIG. 7 is a schematic view of a swing link in a preferred embodiment of the present invention;

wherein: the door knife comprises a door knife bottom plate-1, an unlocking matching piece-11, an unlocking rope-12, a left knife arm-21, a right knife arm-22, an upper swing arm-31, an upper swing arm rotating shaft-311, a lower swing arm-32, a lower swing arm rotating shaft-321, a first rotating shaft-33, a second rotating shaft-34, a lock hook-4, a fixed block-41, a lock hook rotating shaft-42, a counterweight plate-43, a switch component-44, a locking groove-45, a swinging rod-5, a roller-51, a first swinging rod rotating shaft-52, a second swinging rod rotating shaft-53, a traction rope-6, a sliding block-7, a first shaft portion-71, a second shaft portion-72, a notch-73, a guide rod-8, a rotating rod-9, a notch-91, an extension portion-92, a rotating rod rotating shaft-93, a fixed plate-10 and a door ball-100.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

Referring to fig. 1 to 7, a door knife device of the present embodiment includes a door knife base plate 1, and a left knife arm 21, a right knife arm 22, an upper swing arm 31, a lower swing arm 32, a latch hook 4, a swing link 5, a hauling rope 6, a slider 7, a guide rod 8, a rotation rod 9, and a fixing plate 10 fixedly connected to a door hook plate provided on the door knife base plate 1. The upper swing arm 31 is rotatably connected with the door knife bottom plate 1 through a first rotating shaft 33, the lower swing arm 32 is rotatably connected with the door knife bottom plate 1 through a second rotating shaft 34, and the first rotating shaft 33 and the second rotating shaft 34 are positioned in the same vertical direction. The two side parts of the upper swing arm 31 are respectively connected with the left cutter arm 21 and the right cutter arm 22 in a rotating way through two upper swing arm rotating shafts 311, the two side parts of the lower swing arm 32 are respectively connected with the left cutter arm 21 and the right cutter arm 22 in a rotating way through two lower swing arm rotating shafts 321, and the upper swing arm rotating shafts 311 and the lower swing arm rotating shafts 321 which are positioned on the same side are positioned on the same vertical direction. The left cutter arm 21 and the right cutter arm 22 are hinged with the upper swing arm 31 and the lower swing arm 32 through two upper swing arm rotating shafts 311 and two lower swing arm rotating shafts 321 respectively to form a parallelogram.

Further, referring to fig. 1 to 4 and 7, the left lower end of the swing rod 5 is rotatably connected with the upper swing arm 31 through the first swing rod rotating shaft 52, the left upper end of the swing rod 5 is rotatably connected with the slider 7 through the second swing rod rotating shaft 53, the right end of the swing rod 5 is provided with a roller 51, a wheel groove is formed in the roller 51, and the traction rope 6 is slidably connected with the right end of the swing rod 5 through the wheel groove in the roller 51.

Further, referring to fig. 1 to 4 and 6, the latch hook 4 is rotatably connected to a side portion of the pocket base plate 1 through a latch hook rotating shaft 42, and locking and unlocking of the pocket device are achieved through cooperation of the latch hook 4 with a fixing hook (not shown) located on the right side of the latch hook 4. The lock hook 4 is provided with a fixed block 41 and a switch assembly 44, and the right end part of the lock hook 4 is also provided with a weight plate 43. One end of the hauling rope 6 is connected with the fixed block 41, the other end of the hauling rope 6 is connected with the door knife bottom plate 1, and the length of the hauling rope 6 is fixed. When the door is taken off, the door ball 100 touches the left cutter arm 21 or the right cutter arm 22 and can apply a horizontal acting force to the door ball, so that the left cutter arm 21 or the right cutter arm 22 floats, the upper swing arm 31 and the lower swing arm 32 are driven to rotate, the swing rod 5 is driven to rotate, the traction rope 6 is hooked upwards by the rotation of the swing rod 5, the lock hook 4 is driven to lift upwards, the door knife device is unlocked, and the door can be taken off. The switch assembly 44 is used to verify that the lock hook 4 and the fixed hook are locked in place, and the switch assembly 44 is energized only when the lock hook 4 and the fixed hook are locked. The weight plate 43 serves to provide gravitational guidance for closing the shackle 4 into the stationary shackle.

Further, referring to fig. 1 to 4, the rotating lever 9 is rotatably connected to the knife bottom plate 1 through a rotating lever rotating shaft 93, the rotating lever 9 is located at the left side of the fixed plate 10, a notch 91 is formed at one end of the rotating lever 9 away from the fixed plate 10, an extension 92 is formed at one end of the rotating lever 9 close to the fixed plate 10, and the end of the rotating lever 9 with the notch 91 is located between the outer surface of the knife bottom plate 1 and the inner surface of the slider 7.

Further, referring to fig. 1 to 5, the guide bar 8 is disposed in the width direction of the pocket knife base plate 1, the slider 7 is slidably connected to the guide bar 8 in the length direction of the guide bar 8, and the slider 7 is located above the upper swing arm 31. Specifically, a pin shaft penetrating through the thickness direction of the sliding block 7 is arranged on the sliding block 7, the pin shaft comprises a first shaft part 71 and a second shaft part 72, the first shaft part 71 is fixedly connected with a belt fixing piece on a synchronous belt of the door machine, and the synchronous belt is used for driving the sliding block 7 to slide along the length direction of the guide rod 8; the notch 91 can be clamped with the second shaft portion 72, so that the sliding block 7 cannot slide on the guide rod 8, and when the notch 91 is separated from the second shaft portion 72, the sliding block 7 can slide on the guide rod 8 under the transmission action of the synchronous belt. In addition, the upper end portion of the side of the slider 7, which is close to the fixed plate 10, is further provided with a notch 73 matched with the rotating rod 9, so that the swinging rod 5 is convenient to place, especially when the notch 91 of the rotating rod 9 is clamped with the second shaft portion 72 of the pin shaft, if the notch 73 is not provided, the end portion of the rotating rod 9, which is provided with the notch 91, is lifted upwards due to the height of the slider 7, so that the notch 91 is difficult to be clamped with the second shaft portion 72 effectively.

The operation process of the door knife device in the process of opening and closing the door of the elevator is as follows:

referring to fig. 1, when the elevator is closed in place, the slider 7 is located at the rightmost side of the guide rod 8, i.e. at the end of the guide rod 8 near the fixed plate 10, at this time, the extension 92 of the rotating rod 9 abuts against the fixed plate 10, the notch 91 of the rotating rod 9 is not clamped with the second shaft 72, the swing rod 5 rotationally connected with the slider 7 falls, the traction rope 6 is not hooked, the latch hook 4 at this time is clamped in the fixed hook, and the door knife device is locked. At this time, the elevator can continue to run up and down or to a certain level to be opened. Referring to fig. 2 and 3, when the elevator is gradually opened from a closed door state, at which time the car just runs to a certain level, two gate balls 100 of the landing door are located within the length ranges of the left and right cutter arms 21 and 22, but the gate balls 100 are not clamped (as shown in fig. 2). Along with the transmission of the synchronous belt, the sliding block 7 is driven to move from the right side to the left side of the guide rod 8 until the notch 91 is clamped with the second shaft part 72, at the moment, the sliding block 7 does not move any more, and in the right-to-left moving process of the sliding block 7, the swinging rod 5 is driven to rotate, so that the swinging rod 5 hooks the traction rope 6 upwards, the lock hook 4 is lifted upwards, the lock hook 4 is separated from the fixed hook, and the door knife device is unlocked; the rotation of the swing rod 5 also drives the upper swing arm 31 to rotate, so that the left cutter arm 21 and the right cutter arm 22 are driven to move towards each other until the left cutter arm 21 and the right cutter arm 22 clamp the two gate balls 100 on the landing door (as shown in fig. 3). Then, in the state that the sliding block 7 cannot slide continuously, the synchronous belt drives the whole door knife device to move leftwards, and in the process, the landing door and the car door are gradually opened at the same time until the door is opened in place because the left knife arm 21 and the right knife arm 22 are clamped with the gate ball 100.

When the elevator is gradually closed from a door opening state, the whole door knife device is driven to gradually move rightward through the transmission of the synchronous belt, at the moment, the sliding block 7 and the notch 91 are still in a clamping state, when the door knife device moves to the position that the extending part 92 of the rotating rod 9 touches the fixed plate 10 and is in butt joint with the fixed plate, the end part of the rotating rod 9 provided with the notch 91 can be lifted upwards, so that the notch 91 cannot be continuously clamped with the second shaft part 72, at the moment, under the continuous transmission effect of the synchronous belt, the sliding block 7 can be driven to move from the left side to the right side of the guide rod 8, the movement of the sliding block 7 can drive the swinging rod 5 to rotate, the end part connected with the swinging rod 5 and the traction rope 6 gradually falls, and accordingly the lock hook 4 falls down and is locked with the fixed hook, and the elevator is closed in place. The rotation of the swing rod 5 also drives the upper swing arm 31 to rotate, and then drives the left cutter arm 21 and the right cutter arm 22 to move away from each other until the left cutter arm 21 and the right cutter arm 22 release the gate ball 100. The car can now run upwards or downwards.

The running process of the door vane device under different door-pulling working conditions is as follows:

referring to fig. 2 and 3, when the elevator moves to the leveling position (the elevator is in a door-closing state), since the left cutter arm 21 and the right cutter arm 22 clamp two gate balls 100 or the two gate balls 100 are located within the length range of the left cutter arm 21 and the right cutter arm 22, at this time, when the landing door is lifted in the car, the gate ball 100 on the left side touches the left cutter arm 21 and applies a force in the horizontal direction to the left cutter arm 21 to enable the left cutter arm 21 to float, the movement of the left cutter arm 21 drives the upper swing arm 31 and the lower swing arm 32 to rotate, the swing rod 5 is driven to rotate, the pull rope 6 is lifted upwards by the rotation of the swing rod 5, and finally the lock hook 4 is driven to lift, so that the lock hook 4 is separated from the fixed hook, and the gate cutter device is unlocked. When a maintenance person in the hall takes off the door, the gate ball 100 on the right can touch the right knife arm 22 and apply an acting force to the right knife arm 22 in the horizontal direction to enable the right knife arm to move, the upper swing arm 31 and the lower swing arm 32 are driven to rotate by the floating of the right knife arm 22, the swing rod 5 is driven to rotate, the traction rope 6 can be hooked upwards by the rotation of the swing rod 5, the lock hook 4 is finally driven to be lifted, the disengagement of the lock hook 4 and the fixed hook is achieved, and the gate knife device can be unlocked.

Referring to fig. 1, when the elevator is operated to a non-flat floor position (the elevator is in a door-closed state), since the left blade arm 21 and the right blade arm 22 are both separated from the two gate balls 100 on the landing door, no matter the landing door or the car door is taken off, since the left blade arm 21 or the right blade arm 22 does not touch the gate balls 100, the gate balls 100 cannot apply a force in the horizontal direction to the left blade arm 21 or the right blade arm 22, the left blade arm 21 or the right blade arm 22 does not float, and the latch hook 4 remains locked with the fixed hook.

Further, referring to fig. 6, the latch hook 4 is further provided with a latch slot 45, which is located below the latch hook rotating shaft 42. An unlocking matching piece 11 is arranged between the right side part of the door knife bottom plate 1 and the lock hook 4, the unlocking matching piece 11 is connected with an unlocking rope 12, and the unlocking matching piece 11 can slide along the lock groove 45 by pulling the unlocking rope 12. Referring to fig. 4, when the elevator fails and the car approaches the landing door, the rescue personnel can directly pull the unlocking rope 12 in the car to drive the unlocking matching piece 11 to slide in the locking groove 45, and further drive the locking hook 4 to rotate, so that the locking hook 4 is lifted upwards from the fixed hook, unlocking of the door knife device is realized, and the rescue personnel can open the landing door.

According to the door knife device, through the arrangement of the swing rod 5 which is in linkage with the swing arm and the traction rope 6 which is in linkage with the lock hook 4, when a door is pulled, the swing arm is driven to rotate through the floating of the left knife arm 21 or the right knife arm 22, so that the swing rod 5 is driven to rotate, the traction rope 6 is pulled upwards by the rotation of the swing rod 5, the lock hook 4 is driven to lift upwards, so that the door knife device is unlocked, the requirements of various door pulling working conditions in national standards are met, the structure of the door knife device is simplified, and the use safety and reliability are improved.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and to implement the same, but are not intended to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. The door knife device comprises a door knife bottom plate, a left knife arm, a right knife arm, a swing arm and a lock hook, wherein the left knife arm, the right knife arm, the swing arm and the lock hook are arranged on the door knife bottom plate; it is characterized in that the method comprises the steps of,

the door knife device further comprises a swing rod and a traction rope, one end of the traction rope is connected with the lock hook, and the other end of the traction rope is connected with the door knife bottom plate; one end of the swing rod is rotationally connected with the swing arm, and the other end of the swing rod is in sliding connection with the traction rope.

2. The door knife device according to claim 1, wherein two swing arms are provided, the swing arms comprise an upper swing arm and a lower swing arm, and an upper end of the upper swing arm is rotatably connected with a lower end of the swing arm.

3. The door knife device according to claim 1, wherein a roller is arranged at one end of the swing rod away from the swing arm, a wheel groove for sliding the traction rope is formed in the roller, and the wheel groove and the traction rope are located in the same vertical plane.

4. The door knife device according to claim 1, wherein a fixed block is arranged on the lock hook, and one end of the haulage rope is connected with the fixed block.

5. The door knife device according to claim 1, comprising a slider and a guide bar, the slider being slidably connected to the guide bar along a length of the guide bar; the swing rod is rotationally connected with the sliding block.

6. The door knife device of claim 5, further comprising a rotating lever and a fixed plate, wherein the rotating lever is rotatably connected with the door knife bottom plate, and the fixed plate is fixedly connected with the door machine hanging plate; the utility model discloses a door knife, including fixed plate, pivoted lever is kept away from the notch has been seted up to the one end of fixed plate, pivoted lever is close to the one end of fixed plate is provided with the extension, pivoted lever has been seted up the tip of notch is located between the surface of door knife bottom plate and the internal surface of slider.

7. The door knife device according to claim 6, wherein the sliding block is provided with a pin shaft penetrating through the thickness direction of the sliding block, the pin shaft comprises a first shaft part and a second shaft part, the first shaft part is fixedly connected with a belt fixing piece on a synchronous belt, and the synchronous belt is used for driving the sliding block to slide along the length direction of the guide rod; the second shaft portion is engaged with the notch.

8. The door knife device of claim 7, wherein when the slider is located at an end of the guide bar away from the fixed plate, the extension is away from the fixed plate or the extension is contacted with the fixed plate, and the notch is clamped with the second shaft portion; when the sliding block is positioned at one end of the guide rod, which is close to the fixed plate, the extending part is abutted with the fixed plate, and the notch is separated from the second shaft part.

9. The door knife device according to claim 6, wherein a notch matched with the rotating rod is formed in the upper end portion of one side, close to the fixed plate, of the sliding block.

10. The door knife device according to claim 2, wherein a first rotating shaft is arranged between the upper swing arm and the door knife bottom plate, a second rotating shaft is arranged between the lower swing arm and the door knife bottom plate, the upper swing arm is rotatably connected with the door knife bottom plate through the first rotating shaft, the lower swing arm is rotatably connected with the door knife bottom plate through the second rotating shaft, and the first rotating shaft and the second rotating shaft are located in the same vertical direction.