Construction elevator protective door capable of being automatically closed

Abstract

The invention relates to the field of building construction equipment, in particular to an automatic closing construction elevator protective door which comprises a door frame and a door leaf, and the door leaf is connected with the door frame through a locking structure hinge; a handle is arranged on the outer side face of the door leaf and connected with the ground lock assembly through a drive-by-wire device. A rod shaft is arranged on the outer side of the door frame, a deflector rod is fixed to the rod shaft, and the root of the deflector rod is matched with a balance weight lock piece arranged in the door frame in an abutting mode. The rod shaft is connected with the transmission assembly, and the transmission assembly is connected with the door leaf through the first control rope. A counter weight clamping jaw is arranged on the inner side of the door frame, the counter weight clamping jaw is connected with the door leaf through a second control rope, the counter weight clamping jaw is matched with a counter weight component in a grabbing mode, a lock hole formed in the counter weight component is connected with a counter weight locking piece in an inserted mode, and the counter weight component is connected with a locking structure hinge through a third control rope. The protection door can be automatically locked after being opened, the protection door can be automatically closed only by closing the elevator cage door when an operator enters the elevator cage, and the safety protection effect is achieved.

Description

Technical Field

[0001] The present invention relates to the field of building construction equipment, and in particular to an automatically closing protective door for a construction elevator. Background Art

[0002] Construction elevators are an indispensable type of construction machinery in construction projects. In recent years, the height of building construction projects has become increasingly higher, and the protective doors that connect to construction elevators (the door frames of the protective doors are connected to the protective scaffolding outside the building) have become increasingly important. However, in the actual construction production process, some problems often occur:

[0003] (1) After the construction elevator rises to the designated position, it is necessary to open the elevator cage door (the elevator cage door is set on the elevator car) and then open the protective door. Sometimes, due to the large volume of transported materials, construction is inconvenient. When moving materials, the protective door leaves move freely, which can easily cause minor scratches to personnel. Because the materials are transported on the edge, there are certain safety hazards.

[0004] (2) Most of the protective doors on the market use a simple bolt locking method, which results in insufficient safety of the protective doors and may not play the role they should when dealing with emergencies. Summary of the Invention

[0005] In view of the above problems, the purpose of the present invention is to provide an automatically closing construction elevator protective door, and the present invention adopts the following technical solutions:

[0006] The present invention provides an automatically closing construction elevator protective door, comprising a door frame, a door leaf disposed in the door frame, the door leaf being movably connected to the door frame via a pivot assembly, the door leaf opening toward the inner side of the door frame, a handle disposed on the outer side of the door leaf, the bottom of the door leaf being locked with the door frame via a floor lock assembly, the floor lock assembly being connected to the handle via a wired control device;

[0007] The door leaf is connected to the door frame via a locking structure hinge;

[0008] A rod shaft is provided on the outer side of the door frame, the rod shaft is rotatably connected to the door frame, a shift lever is fixed on the rod shaft, and the root of the shift lever is pressed and engaged with a counterweight lock member provided in the door frame; the rod shaft is connected to a transmission assembly, and the transmission assembly is connected to the door leaf via a first control rope;

[0009] A counterweight clamp, a counterweight component and a limiting slide are provided on the inner side of the door frame, the counterweight clamp is connected to the door leaf through a second control rope, the counterweight component is located below the counterweight clamp, the counterweight component is engaged with the counterweight clamp, the counterweight component is arranged in the limiting slide, the limiting slide limits the lowest position of the counterweight component, a first lock hole is provided on the counterweight component, the first lock hole is plugged and engaged with the counterweight lock piece, and the counterweight component is hingedly connected to the locking structure through a third control rope;

[0010] A pulley block for guiding the first control rope and the second control rope is provided on the top of the door frame.

[0011] Preferably, the pivot assembly includes a common hinge and a spring hinge; two door leaves are provided in the door frame, and the two door leaves are in the form of double doors.

[0012] Preferably, the floor lock assembly includes a hollow shell, an inner pin and a roller, the hollow shell is fixed to the bottom of the door leaf, the inner pin is vertically slidably connected to the hollow shell, the lower end of the inner pin is installed with the roller, the upper end of the inner pin is connected to the wire control device, and the handle controls the roller to retract into the hollow shell through the wire control device.

[0013] Preferably, the wire control device includes a fourth control rope, and both ends of the fourth control rope are provided with pull rings, and the two pull rings are respectively connected to the handle and the inner pin.

[0014] Preferably, the locking structure hinge includes a fixed end and a movable end, the fixed end and the movable end are pivotally connected together through a hinge shaft, the fixed end is fixed to the door frame, and the movable end is fixed to the door leaf;

[0015] A locking piece is fixed on the page of the movable end, and a second lock hole is provided on the locking piece. A slot is fixed on the page of the fixed end. When the movable end rotates close to the fixed end, the locking piece is plugged into and matched with the slot. A lock shell is provided below the slot, and a lock tongue that can slide vertically is provided in the lock shell. A second elastic member is provided in the lock shell, and the upper end of the second elastic member abuts on the lock tongue, and the lower end abuts on the bottom of the lock shell. The upper end of the lock tongue extends into the slot, and the lower end of the lock tongue extends to the outside of the lock shell and is connected to a hook, and the hook is connected to the third control rope.

[0016] Preferably, the counterweight lock member includes a counterweight lock rod and a first elastic member, the counterweight lock rod is slidably connected to the reserved hole of the door frame, one end of the first elastic member is against the inner wall of the door frame, and the other end is against the limiting ring of the outer wall of the counterweight lock rod, and the first elastic member and the shift rod are respectively located on both sides of the limiting ring.

[0017] Preferably, the transmission assembly includes a chain and a sprocket, the upper end of the chain is connected to the first control rope, the lower end of the chain is connected to the outer puller, the outer puller is installed on the door frame, the sprocket is engaged with the chain, the sprocket is fixed on the sprocket shaft, the wheel shaft is rotatably connected to the door frame, and a first gear is also installed on the wheel shaft, a second gear is engaged above the first gear, and the second gear is installed on the rod shaft.

[0018] Preferably, an inner retractor is provided on the inner side of the door frame, and the inner retractor is connected to the counterweight member.

[0019] Preferably, a limiting protrusion is provided at the root of the shifting rod, and a limiting groove is provided at the pressing end of the counterweight locking piece. When the shifting rod is rotated to a horizontal state, the limiting protrusion is engaged with the limiting groove.

[0020] Preferably, the counterweight clamp is a scissor-type lever structure member, which is composed of two long strip members pivotally connected together by a pin, and the long ends of the two long strip members are provided with clamping hooks, and the pivotal connection of the two long strip members is provided with an elastic member. Under normal circumstances, the clamping hooks are in a combined state and clamp the counterweight member;

[0021] The short ends of the two long strip members are arc-shaped inwardly, and a mixing block is provided at the position of the ascending trajectory of the counterweight clamping claw. When the second control rope drives the counterweight clamping claw to ascend, the short ends of the two long strip members touch the mixing block, and the short ends of the long strip members are opened outward, and the clamping hooks at the long ends are linked to open, and the clamping hooks are released to release the counterweight member; when the counterweight clamping claw descends, the lower end of the clamping hook touches the top of the counterweight member and re-grasps the counterweight member;

[0022] The top of the counterweight component is a slot structure with a sharp angle.

[0023] Compared with the prior art, the present invention has the following beneficial technical effects:

[0024] The protective door of the present invention can be automatically locked after being opened. When the operator enters the elevator car, he only needs to close the elevator cage door and the protective door will automatically close, thus playing a role of safety protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic structural diagram of the outer side of the automatically closing construction elevator protective door of the present invention;

[0027] Figure 2This is a left-side structural schematic diagram of the automatically closing construction elevator protective door of the present invention;

[0028] Figure 3 This is a schematic structural diagram of the inner side of the automatically closing construction elevator protective door of the present invention;

[0029] Figure 4 This is a schematic top view of the structure of the automatically closing construction elevator protective door of the present invention;

[0030] Figure 5 for Figure 1 A partial enlarged view of point A in the middle;

[0031] Figure 6 It is a structural schematic diagram of the transmission assembly of the present invention;

[0032] Figure 7 This is a schematic diagram of the shift lever of the present invention in an initial state;

[0033] Figure 8 This is a schematic diagram of the shift lever of the present invention in a horizontal state;

[0034] Figure 9 This is a schematic diagram of the cooperation between the counterweight component and the counterweight clamping claw of the present invention;

[0035] Figure 10 It is a structural schematic diagram of the counterweight component and the counterweight clamping claw of the present invention;

[0036] Figure 11 for Figure 9 A partial enlarged view of point B in the middle;

[0037] Figure 12 It is a structural diagram of the ground lock assembly and wire control device of the present invention.

[0038] Explanation of reference numerals: 1. door frame; 2. door leaf; 3. pivot assembly; 4. handle; 5. floor lock assembly; 501. hollow housing; 502. inner pin; 503. roller; 6. wire control device; 601. fourth control rope; 602. pull ring; 7. locking structure hinge; 701. fixed end; 702. movable end; 703. locking plate; 704. second lock hole; 705. slot; 706. lock housing; 707. lock tongue; 708. second elastic member; 709. hook; 8. rod shaft; 9. lever; 10. counterweight lock member; 1001. counterweight lock rod; 1002. First elastic member; 1003, limiting ring; 11, transmission assembly; 1101, chain; 1102, sprocket; 1103, outer puller; 1104, sprocket shaft; 1105, first gear; 1106, second gear; 12, first control rope; 13, counterweight clamp; 1301, long strip member; 1302, clamping hook; 1303, mixing block; 14, counterweight member; 15, limiting slide; 16, second control rope; 17, first locking hole; 18, third control rope; 19, pulley block; 20, inner puller; 21, limiting protrusion; 22, limiting groove. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0040] like Figures 1 to 6 As shown, this embodiment discloses an automatically closing construction elevator protective door, including a door frame 1, in which a door leaf 2 is provided. The door leaf 2 is movably connected to the door frame 1 through a pivot assembly 3. The door leaf 2 opens toward the inner side of the door frame 1. A handle 4 is provided on the outer side of the door leaf 2. The bottom of the door leaf 2 is locked with the door frame 1 through a ground lock assembly 5. The ground lock assembly 5 is connected to the handle 4 through a wire control device 6.

[0041] The door leaf 2 is connected to the door frame 1 through a locking structure hinge 7; a rod shaft 8 is provided on the outside of the door frame 1, and the rod shaft 8 is rotatably connected to the door frame 1. A shift lever 9 is fixed on the rod shaft 8, and the root of the shift lever 9 is pressed and fitted with a counterweight lock 10 set in the door frame 1; the rod shaft 8 is connected to the transmission assembly 11, and the transmission assembly 11 is connected to the door leaf 2 through a first control rope 12. The inner side of the door frame 1 is provided with a counterweight clamping claw 13, a counterweight member 14 and a limiting slide 15. The counterweight clamping claw 13 is connected to the door leaf 2 via a second control rope 16. The counterweight member 14 is located below the counterweight clamping claw 13 and engages with the counterweight clamping claw 13. The counterweight member 14 is set in the limiting slide 15, which limits the lowest position of the counterweight member 14. The counterweight member 14 is provided with a first lock hole 17. The first lock hole 17 is long and plugs into the counterweight lock 10. The counterweight member 14 is connected to the locking structure hinge 7 via a third control rope 18. The top of the door frame 1 is provided with a pulley block 19 for guiding the first control rope 12 and the second control rope 16.

[0042] The pivot assembly 3 includes a common hinge and a spring hinge, which are arranged on the inner side of the door frame 1. The door frame 1 is provided with two door leaves 2, which are in the form of bi-fold doors.

[0043] like Figures 5 to 8 As shown, the transmission assembly 11 includes a chain 1101 and a sprocket 1102. The upper end of the chain 1101 is connected to the first control rope 12, and the lower end of the chain 1101 is connected to the outer puller 1103. The outer puller 1103 is installed on the door frame 1. The sprocket 1102 is engaged with the chain 1101. The sprocket 1102 is fixed on the sprocket shaft 1104. The sprocket shaft 1104 is rotatably connected to the door frame 1. A first gear 1105 is also installed on the sprocket shaft 1104. A second gear 1106 is engaged above the first gear 1105, and the second gear 1106 is installed on the rod shaft 8.

[0044] The counterweight lock 10 includes a counterweight lock rod 1001, which is slidably connected to the reserved hole of the door frame 1. A first elastic member 1002 is sleeved on the counterweight lock rod 1001. One end of the first elastic member 1002 is against the inner wall of the door frame 1, and the other end is against the limiting ring 1003 on the outer wall of the counterweight lock rod 1001. The first elastic member 1002 and the shift rod 9 are respectively located on both sides of the limiting ring 1003.

[0045] The base of the lever 9 is provided with a limit protrusion 21, and the pressing end of the counterweight lock 10 is provided with a limit groove 22. When the lever 9 is rotated to the horizontal state, the limit protrusion 21 engages with the limit groove 22. The limit groove 22 is specifically designed at one end of the counterweight lock rod 1001 near the base of the lever 9.

[0046] In this embodiment, an inner retractor 20 is provided on the inner side of the door frame 1 and is connected to the counterweight member 14. The inner retractor 20 and the outer retractor 1103 function identically: the inner retractor 20 pulls the counterweight member 14 downward, while the outer retractor 1103 pulls the chain 1101 downward. The structures of the inner retractor 20 and the outer retractor 1103 are similar to those of a built-in spring take-up (or a box-shaped ruler structure).

[0047] like Figure 9 and 10 As shown, the counterweight clamping jaw 13 is a scissor-like lever structure composed of two elongated members 1301 pivotally connected by a pin. Each of the long ends of the two elongated members 1301 is provided with a clamping hook 1302. An elastic member is provided at the pivotal connection between the two elongated members 1301. Under the action of the elastic member (under normal circumstances), the clamping hooks 1302 are in a closed state and clamp the counterweight member 14. The elastic member can be a torsion spring. The second control rope 16 is connected to the pivotal axis of the two elongated members 1301.

[0048] The inner sides of the short ends of the two long strip members 1301 are arc-shaped, and a mixing block 1303 is provided at the rising trajectory position of the counterweight clamp 13. The mixing block 1303 is fixed on the door frame 1. During the rising process of the counterweight clamp 13 driven by the second control rope 16, the short ends of the two long strip members 1301 touch the mixing block 1303, and then the short ends of the two long strip members 1301 are opened outward, and the clamping hooks 1302 at the long ends are linked and opened at the same time, and the clamping hooks 1302 are released to release the counterweight member 14; when the counterweight clamp 13 is lowered, the clamping hook 1302 touches the top of the counterweight member 14 under its own gravity and re-grasps the counterweight member 14. After the clamping hooks 1302 are merged, the counterweight clamp 13 and the counterweight structure 14 are in a zero state.

[0049] The counterweight structure 14 is a customized special component with a pointed slot structure at the top. The slot structure is hooked with the clamping hook 1302, and an iron ring is reserved at the bottom, which is connected to the inner retractor 20. The counterweight structure 14 is equipped with a guide wheel, which can slide up and down along the limiting slide 15. When the counterweight structure 14 is lifted to the specified height, the counterweight locking rod 1001 is pushed out by the limiting protrusion 21, and the counterweight locking rod 1001 just catches the counterweight structure. Because the stroke of the counterweight structure 14 cannot be perfectly synchronized with the counterweight locking rod 1001 100%, and the linkage between the counterweight locking rod 1001 and the counterweight structure 14 is the key part of this technology, the first lock hole 17 set in the middle of the counterweight structure 14 is rectangular to increase the allowable deviation and adapt to the influence of different abnormal factors.

[0050] like Figure 11As shown, the locking structure hinge 7 is located above the counterweight structure 14. The counterweight structure 14 controls the opening or closing of the locking function of the locking structure hinge 7 via a third control rope 18. The locking structure hinge 7 includes a fixed end 701 and a movable end 702. The fixed end 701 and the movable end 702 are pivotally connected together via a hinge axis. The fixed end 701 is fixed to the door frame 1, and the movable end 702 is fixed to the door leaf 2.

[0051] A locking piece 703 is fixed to the leaf of the movable end 702, and a second locking hole 704 is provided in the locking piece 703. A slot 705 is fixed to the leaf of the fixed end 701. When the movable end 702 rotates toward the fixed end 701, the locking piece 703 engages with the slot 705. A lock housing 706 is provided below the slot 705. A vertically slidable locking tongue 707 is provided in the lock housing 706. A second elastic member 708 is provided in the lock housing 706. The upper end of the second elastic member 708 abuts against the locking tongue 707, and the lower end abuts against the bottom of the lock housing 706. The upper end of the locking tongue 707 extends into the slot 705, and the lower end of the locking tongue 707 extends outside the lock housing 706 and is connected to a hook 709. The hook 709 is connected to the third control rope 18. The second elastic member 708 can be specifically a spring.

[0052] When the door leaf 2 is in the closed state, the hinge of the movable end box and the hinge of the fixed end are in a parallel state. When the protective door leaf is opened, the door leaf 2 grabs the counterweight component 14 through the second control rope 16 and the counterweight clamp 13. The counterweight component 14 releases the third control rope 18 during the rising process, causing it to become loose, and the locking function of the locking structure hinge 7 can be opened, that is, the third control rope 18 releases the lock tongue 707, and the lock tongue 707 extends into the slot 705 under the action of the second elastic member 708. When the door leaf 2 is opened to 90 degrees, the locking plate 703 is inserted into the slot 705. The locking plate 703 will hit the lock tongue 707 during the insertion process, pressing the lock tongue 707 down. When the second lock hole 704 on the lock plate 703 corresponds to the lock tongue 707, the lock tongue 707 extends out of the second elastic member 708 and is inserted into the second lock hole 704, thereby realizing the locking of the fixed end 701 and the movable end 702.

[0053] When the counterweight lock 10 releases the locking limit on the counterweight component 14, the counterweight component 14 descends due to gravity. When the counterweight component 14 pulls the lock tongue 707 back into the lock shell 706 through the third control rope 18, the locking function of the locking structure hinge 7 is closed.

[0054] It should be noted that the locking piece 703 will collide with the locking tongue 707 during the insertion process. In order to facilitate the locking tongue 707 to be better inserted into the second lock hole 704, the impact surface of the locking tongue 707 can be set to an arc surface.

[0055] like Figure 11As shown, the floor lock assembly 5 includes a hollow shell 501, an inner pin 502 and a roller 503. The hollow shell 501 is fixed to the bottom of the door leaf 2, and the inner pin 502 is vertically slidably connected in the hollow shell 501. The lower end of the inner pin 502 is installed with a roller 503, and the upper end of the inner pin 502 is connected to the wire control device 6. The handle 4 controls the roller 503 to retract into the hollow shell 501 through the wire control device 6. When the door is closed, a groove is designed at the bottom of the door frame 1 to be embedded with the roller 503.

[0056] The wired control device 6 includes a fourth control cord 601, each end of which is provided with a pull ring 602. The two pull rings 602 are respectively connected to the handle 4 and the inner pin 502. The handle 4 is a lever structure, pivotally connected to the door leaf 2. The handle 4 has a long end and a short end. The long end is the handle, and the short end is connected to the wired control device 6. When the long end of the handle 4 is rotated downward, the short end tilts up, driving the fourth control cord 601, which raises the inner pin 502 of the floor lock assembly 5, retracting the roller 503 into the hollow housing 501, unlocking the floor lock assembly and opening the protective door.

[0057] like Figure 7 and 8 As shown, the working process of the invention is as follows:

[0058] During installation, you only need to connect and fix the door frame 1 to the external protective scaffolding. The height can be adjusted according to actual conditions. The bottom should be the same as the elevation of the protective frame conveying platform, or placed on the platform.

[0059] During normal construction of the construction elevator, after it stops at a floor, the construction workers open the elevator cage door and rotate the handle 4. The handle 4 opens the ground lock assembly 5 through the wire control device 6, and the door leaf 2 can be easily opened. When the door leaf 2 is pushed open, the door leaf 2 simultaneously pulls up the counterweight clamp 13 and the chain 1101 through the first control rope 12 and the second control rope 16. When the chain 1101 is pulled up, the chain 1101 is driven to rotate by the sprocket 1102, and the sprocket 1102 drives the lever 9 to rotate through the first gear 1105 and the second gear 1106 engaged at the side, so that the rod end of the lever 9 is lifted to a horizontal state. When the lever 9 is turned to a horizontal state, the counterweight lock rod 1001 is slowly pushed out to the outside of the door frame 1 and plugged into the first lock hole 17 in the middle of the counterweight component 14. After the lever 9 is finally lifted to a horizontal state, the limiting protrusion 21 at the root of the lever 9 is engaged with the limiting groove 22 at the end of the counterweight lock rod 1001, so that the lever 9 is constrained to the horizontal stage; at the same time, the counterweight clamping claw 13 grabs the counterweight component 14 to make it When the door 2 is lifted together, the counterweight member 14 releases the third control rope 18 during the rising process, causing it to become loose, and the locking function of the locking structure hinge 7 can be activated. That is, the third control rope 18 releases the lock tongue 707, and the lock tongue 707 extends into the slot 705 under the action of the second elastic member 708. When the door 2 is opened to 90 degrees, the locking plate 703 is inserted into the slot 705. During the insertion process, the locking plate 703 hits the lock tongue 707, pressing the lock tongue 707 downward. When the second lock hole 704 on the locking plate 703 aligns with the lock tongue 707, the lock tongue 707 extends into the second elastic member 708 and inserts into the second lock hole 704, thereby locking the fixed end 701 and the movable end 702. In an emergency, the hook rope under the locking structure hinge 7 can be pulled internally to loosen it, and the door 2 can be closed.

[0060] When the door leaf 2 is opened 90 degrees, the counterweight clamp 13 is also lifted to the top mixing block 1303, the counterweight clamp 13 opens, and the counterweight component 14 is released. Since the counterweight locking rod 1001 has been inserted into the first locking hole 17, the counterweight component 14 will be restricted by the counterweight locking rod 1001 and stop falling after it drops a certain distance.

[0061] When the transportation work of the floor is completed, the operator enters the elevator car and only needs to close the elevator cage door (the elevator cage door is usually a top-bottom door structure). When the upper half of the elevator cage door falls, the dial rod 9 is pressed down to rotate and reset the dial rod 9 and disengage the counterweight lock rod 1001. The counterweight lock rod 1001 is disengaged from the first lock hole 17 under the action of the first elastic member 1002. The counterweight lock rod 1001 can no longer restrain the counterweight component 14, and the counterweight component 14 falls on the limiting slide 15. The counterweight component 14 pulls the hook at the bottom of the locking structure hinge 7 through the third control rope 18 at the moment it falls to the bottom, and the locking structure hinge 7 opens. The door leaf loses its constraint, and under the action of the inner retractor 20, the outer retractor 1103 and the spring hinge, the door leaf 2 automatically closes.

[0062] As the door is about to close, the floor lock assembly 5 automatically springs up due to the notch below the door frame. Once the door is completely closed, it descends, automatically locking the door. No further operation by the construction worker is required. Simultaneously, as the counterweight jaws 13 descend, the clamping hooks 1302, under their own weight, contact the top of the counterweight structure 14 and re-engage it. Once the clamping hooks 1302 close, the counterweight jaws 13 and the counterweight structure 14 return to their zero position.

[0063] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. An automatically closing construction elevator protective door, comprising a door frame (1), a door leaf (2) provided in the door frame (1), the door leaf (2) being movably connected to the door frame (1) via a pivot assembly (3), the door leaf (2) opening toward the inner side of the door frame (1), and a handle (4) provided on the outer side of the door leaf (2), characterized in that: The bottom of the door leaf (2) is locked with the door frame (1) via a floor lock assembly (5), and the floor lock assembly (5) is connected to the handle (4) via a wire control device (6); The door leaf (2) is connected to the door frame (1) via a locking structure hinge (7); A rod shaft (8) is provided on the outside of the door frame (1), the rod shaft (8) is rotatably connected to the door frame (1), a shifting rod (9) is fixed to the rod shaft (8), and the root of the shifting rod (9) is pressed and fitted with a counterweight lock (10) provided in the door frame (1); the rod shaft (8) is connected to a transmission assembly (11), and the transmission assembly (11) is connected to the door leaf (2) via a first control rope (12); The inner side of the door frame (1) is provided with a counterweight clamp (13), a counterweight component (14) and a limiting slide (15); the counterweight clamp (13) is connected to the door leaf (2) through a second control rope (16); the counterweight component (14) is located below the counterweight clamp (13); the counterweight component (14) and the counterweight clamp (13) are engaged with each other; the counterweight component (14) is arranged in the limiting slide (15); the limiting slide (15) limits the lowest position of the counterweight component (14); a first lock hole (17) is provided on the counterweight component (14); the first lock hole (17) is plugged into the counterweight lock element (10); the counterweight component (14) is connected to the locking structure hinge (7) through a third control rope (18); A pulley block (19) for guiding the first control rope (12) and the second control rope (16) is provided on the top of the door frame (1).

2. The automatically closing construction elevator protective door according to claim 1, characterized in that: The pivot assembly (3) comprises a common hinge and a spring hinge; two door leaves (2) are arranged in the door frame (1), and the two door leaves (2) are in the form of double doors.

3. The automatically closing construction elevator protective door according to claim 1 is characterized in that: The floor lock assembly (5) comprises a hollow shell (501), an inner latch (502) and a roller (503); the hollow shell (501) is fixed to the bottom of the door leaf (2); the inner latch (502) is vertically slidably connected in the hollow shell (501); the roller (503) is installed at the lower end of the inner latch (502); the upper end of the inner latch (502) is connected to the wire control device (6); the handle (4) controls the roller (503) to retract into the hollow shell (501) through the wire control device (6).

4. The automatically closing construction elevator protective door according to claim 3 is characterized in that: The wire control device (6) comprises a fourth control rope (601), both ends of which are provided with pull rings (602), and the two pull rings (602) are respectively connected to the handle (4) and the inner pin (502).

5. The automatically closing construction elevator protective door according to claim 1, characterized in that: The locking structure hinge (7) comprises a fixed end (701) and a movable end (702), wherein the fixed end (701) and the movable end (702) are pivotally connected together via a hinge shaft, the fixed end (701) is fixed to the door frame (1), and the movable end (702) is fixed to the door leaf (2); A locking piece (703) is fixed on the sheet of the movable end (702), and a second locking hole (704) is provided on the locking piece (703). A slot (705) is fixed on the sheet of the fixed end (701). When the movable end (702) rotates close to the fixed end (701), the locking piece (703) is plugged into and matched with the slot (705). A lock shell (706) is provided below the slot (705), and a lock that can slide vertically is provided in the lock shell (706). A movable lock tongue (707) is provided in the lock shell (706), and a second elastic member (708) is provided in the lock shell (706). The upper end of the second elastic member (708) is against the lock tongue (707), and the lower end is against the bottom of the lock shell (706). The upper end of the lock tongue (707) extends into the slot (705), and the lower end of the lock tongue (707) extends to the outside of the lock shell (706) and is connected to a hook (709). The hook (709) is connected to the third control rope (18).

6. The automatically closing construction elevator protective door according to claim 1, characterized in that: The counterweight lock member (10) comprises a counterweight lock rod (1001) and a first elastic member (1002); the counterweight lock rod (1001) is slidably connected to a reserved hole of the door frame (1); one end of the first elastic member (1002) abuts against the inner wall of the door frame (1), and the other end abuts against a limiting ring (1003) on the outer wall of the counterweight lock rod (1001); the first elastic member (1002) and the shift rod (9) are respectively located on both sides of the limiting ring (1003).

7. The automatically closing construction elevator protective door according to claim 1, characterized in that: The transmission assembly (11) comprises a chain (1101) and a sprocket (1102), the upper end of the chain (1101) is connected to the first control rope (12), the lower end of the chain (1101) is connected to the outer retractor (1103), the outer retractor (1103) is mounted on the door frame (1), the sprocket (1102) is meshed with the chain (1101), the sprocket (1102) is fixed on a sprocket shaft (1104), the wheel shaft (1104) is rotatably connected to the door frame (1), a first gear (1105) is further mounted on the wheel shaft (1104), a second gear (1106) is meshed above the first gear (1105), and the second gear (1106) is mounted on the rod shaft (8).

8. The automatically closing construction elevator protective door according to claim 1, characterized in that: An inner retractor (20) is provided on the inner side of the door frame (1), and the inner retractor (20) is connected to the counterweight component (14).

9. The automatically closing construction elevator protective door according to claim 1, characterized in that: A limiting protrusion (21) is provided at the root of the shifting rod (9), and a limiting groove (22) is provided at the pressing end of the counterweight lock (10). When the shifting rod (9) is rotated to a horizontal state, the limiting protrusion (21) is engaged with the limiting groove (22).

10. The automatically closing construction elevator protective door according to claim 1, characterized in that: The counterweight clamping claw (13) is a scissor-type lever structure component, which is composed of two long strip members (1301) pivotally connected together by a pin. The long ends of the two long strip members (1301) are each provided with a clamping hook (1302). The pivotal connection of the two long strip members (1301) is provided with an elastic member. Under normal circumstances, the clamping hook (1302) is in a combined state, and the clamping hook (1302) clamps the counterweight member (14); The short ends of the two long strip members (1301) are arc-shaped inwardly, and a mixing block (1303) is provided at the ascending trajectory position of the counterweight clamping claw (13). When the second control rope (16) drives the counterweight clamping claw (13) to ascend, the short ends of the two long strip members (1301) touch the mixing block (1303), and then the short ends of the long strip members (1301) are opened outward, and the clamping hook (1302) at the long end is opened in conjunction, and the clamping hook (1302) is loosened to release the counterweight member (14); when the counterweight clamping claw (13) is lowered, the lower end of the clamping hook (1302) touches the top of the counterweight member (14) and re-grasps the counterweight member (14); The top of the counterweight component (14) is a slot structure with a sharp angle.

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