Bolt device for protective door of construction elevator

Abstract

A bolt device for a construction elevator protective door is used for solving the technical problems that in some elevator protective doors mentioned in the background technology, bolts at the tops of two protective door plates need to be limited and fixed respectively, then bolts in the middles of the protective door plates need to be limited and fixed, and the operation steps are tedious. Comprising a door frame, protection door plates are symmetrically arranged on the inner side of the door frame, the two protection door plates are hinged to the door frame, a disc is rotationally arranged on the top of one protection door plate, the side face, away from the protection door plate, of the disc is elastically connected with an operation cylinder through a spring, and a first insertion rod and a second insertion rod are fixedly arranged on the operation cylinder; a sleeve is rotatably arranged at the top of the other protective door plate, a third insertion rod is slidably arranged in the sleeve, and a locking assembly is arranged between the third insertion rod and the sleeve; a slot is formed in the side wall, close to the top of the protective door plate, of the door frame.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety door technology, and in particular to a latch device for construction elevator safety doors. Background Technology

[0002] An elevator is a permanent transportation device that serves several specific floors within a building, with its car moving on at least two rigid tracks that are perpendicular to the horizontal plane or have an angle of inclination of less than 15° to the vertical. In some construction sites, construction elevators are usually construction hoists. Therefore, construction elevators need to be equipped with safety doors to ensure the safety of riding in construction elevators.

[0003] Existing technology, such as the utility model patent document with authorization announcement number "CN220485032U" and patent name "A kind of floor elevator safety door", discloses a safety door. The device includes a door frame, with protective door panels symmetrically arranged on the inner side of the door frame. A protective net is installed on the top surface of the protective door panel, and a warning sign is provided on the surface of the protective net. The protective door panel is equipped with a latch.

[0004] In the prior art, the safety doors of elevators at construction sites must be kept closed at all times. Therefore, the safety doors are usually equipped with latches. After the construction workers get off the elevator, the elevator operator needs to close the door and latch it. However, the aforementioned patent literature requires limiting and fixing the latches at the top of the two safety door panels respectively, and then limiting and fixing the latch in the middle of the safety door panel. The operation steps are relatively cumbersome. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a latch device for construction elevator safety doors, which solves the technical problem mentioned in the background art that some elevator safety doors require limiting and fixing the latches at the top of the two safety door panels separately, and then limiting and fixing the latch in the middle of the safety door panel, making the operation steps cumbersome.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0007] A safety door latch device for construction elevators includes a door frame. Symmetrically arranged safety door panels are mounted on the inner side of the door frame, both hinged to the frame. A disc is rotatably mounted on the top of one safety door panel, rotating parallel to the panel. An operating cylinder is elastically connected to the side of the disc away from the door panel via a spring. One end of the spring is fixed to the disc, and the other end to the operating cylinder. A first and second latch are fixedly mounted on the operating cylinder. A sleeve is rotatably mounted on the top of the other safety door panel, rotating towards the inner side. A third latch is slidably mounted within the sleeve. A locking assembly exists between the third latch and the sleeve, locking the position of the third latch. A slot is provided on the side wall of the door frame near the top of the safety door panel, limiting the movement of the second and third latches.

[0008] Working principle:

[0009] When closing the protective door, rotate the two protective door panels inward, then squeeze the operating cylinder and rotate the disc, moving away from the protective door panel and rotating the sleeve so that the first insert is inserted between the sleeve and the protective door panel. Then release the operating cylinder, and the second insert abuts against the inner wall of the slot. Then rotate the sleeve towards the protective door panel and slide the third insert out of the sleeve so that the third insert is inserted into the slot and abuts against the inner wall of the slot, thereby locking the two protective door panels.

[0010] Beneficial effects:

[0011] In this solution, a rotating disc, an operating cylinder, a first insert rod, a second insert rod, a sleeve, a third insert rod, and a slot are used. The rotating disc causes the first insert rod to engage between the sleeve and the protective door panel, and the second insert rod to abut against the inner wall of the slot. Then, the sleeve is rotated inwards towards the protective door panel, causing the third insert rod to slide out of the sleeve and engage in the slot, abutting against the inner wall of the slot. This locks both protective door panels and the door frame, reducing the tedious steps of locking the two protective door panels separately and improving work efficiency. A spring connects the disc and the operating cylinder, allowing the second insert rod to abut against the inner wall of the slot after the worker releases the pressure from the operating cylinder, improving the stability of the locked protective door panel. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0013] Figure 2 for Figure 1 Enlarged structural diagram at point A in the middle.

[0014] In the above attached figures: door frame 1, protective door panel 2, disc 3, operating cylinder 4, first insert rod 5, second insert rod 6, sleeve 7, third insert rod 8, slot 9, bearing 10, mounting plate 11, rotating shaft 12, first limit block 13, through hole 14, grip rod 15, second limit block 16. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0016] Example:

[0017] like Figure 1 and Figure 2 As shown, a safety door latch device for construction elevators includes a door frame 1. Safety door panels 2 are symmetrically arranged on the inner side of the door frame 1. Both safety door panels 2 are hinged to the door frame 1. It should be noted that the hinged connection between the two safety door panels 2 and the door frame 1 is prior art. Those skilled in the art should understand its structure, principle, and usage, which will not be described in detail here. A disc 3 is rotatably mounted on the top of one of the safety door panels 2. The disc 3 rotates parallel to the safety door panel 2. An operating cylinder 4 is elastically connected to the side of the disc 3 away from the safety door panel 2 via a spring. One end of the spring is fixed to the disc 3, and the other end is fixed to... An operating cylinder 4 is fixedly mounted with a first insert rod 5 and a second insert rod 6. A sleeve 7 is rotatably mounted on the top of another protective door panel 2. The sleeve 7 rotates toward the inside of the protective door panel 2, and a third insert rod 8 is slidably mounted inside the sleeve 7. A locking assembly exists between the third insert rod 8 and the sleeve 7 to lock the position of the third insert rod 8. A slot 9 is provided on the side wall of the door frame 1 near the top of the protective door panel 2. The slot 9 is elongated and can accommodate the movement trajectory of the first insert rod 5 rotating around the axis of the disc 3 within the slot 9. The slot 9 is used to limit the movement of the second insert rod 6 and the third insert rod 8.

[0018] In this solution, a rotating disc 3, an operating cylinder 4, a first insert 5, a second insert 6, a sleeve 7, a third insert 8, and a slot 9 are configured. Rotating the disc 3 causes the first insert 5 to engage between the sleeve 7 and the protective door panel 2, and the second insert 6 to abut against the inner wall of the slot 9. Then, rotating the sleeve 7 towards the inner side of the protective door panel 2 causes the third insert 8 to slide out of the sleeve 7, allowing it to engage in the slot 9 and abut against the inner wall of the slot 9. This locks both protective door panels 2 and the door frame 1, reducing the tedious steps of locking the two protective door panels 2 separately and improving work efficiency. A spring connects the disc 3 and the operating cylinder 4, allowing the second insert 6 to abut against the inner wall of the slot 9 after the worker releases the pressure from the operating cylinder 4, improving the stability of the locked protective door panel 2.

[0019] like Figure 2As shown, a bearing 10 is fixed to the top of one of the protective door panels 2, and the center line of the rotation axis 12 of the bearing 10 is perpendicular to the protective door panel 2. The disc 3 is fixed to the inner wall of the bearing 10. Figure 2 As shown, two mounting plates 11 are fixed on the other protective door panel 2. Each mounting plate 11 has a rotating shaft 12 rotatably mounted on it via a bearing 10. The two rotating shafts 12 are parallel and their axes are parallel to the plane of the protective door panel 2. The end of the sleeve 7 away from the open end is fixed between the two rotating shafts 12. The sleeve 7 can rotate around the two rotating shafts 12. However, since the distance between one end of the sleeve 7 and the rotating shaft 12 is longer and the distance between the other end of the sleeve 7 and the rotating shaft 12 is shorter, the rotation angle of the sleeve 7 is 0°~180°. When the protective door panel 2 is open, because the distance between one end of the sleeve 7 and the rotating shaft 12 is longer, under the action of gravity, this end will rotate around the rotating shaft 12 and face downward.

[0020] like Figure 2 As shown, the locking assembly includes two first limiting blocks 13. The sleeve 7 has a through hole 14 parallel to the axial direction of the sleeve 7 on its side wall. A gripping rod 15 is fixed on the outer surface of the third insertion rod 8. The gripping rod 15 is located outside the sleeve 7. The third insertion rod 8 can rotate inside the sleeve 7. The angle at which the gripping rod 15 drives the third insertion rod 8 to rotate inside the sleeve 7 is 0°~180°. The two first limiting blocks 13 are fixed on the outer surface of the sleeve 7 near its opening end. There is a gap between the two first limiting blocks 13 for the gripping rod 15 to drive the third insertion rod 8 to slide out of the sleeve 7 and rotate before inserting it into the gap. It should be noted that the insertion of the third insertion rod 8 into the gap between the two first limiting blocks 13 is a snap-fit, which is existing technology. Those skilled in the art should understand its structure, principle, and usage, etc., and will not be described in detail here.

[0021] like Figure 2 As shown, the locking assembly also includes two second limiting blocks 16, which are fixed to the outer surface of the other end of the sleeve 7. A gap exists between the two second limiting blocks 16, allowing the gripping rod 15 to drive the third insertion rod 8 to slide into the sleeve 7 and rotate before inserting it into the gap. It should be noted that the insertion of the third insertion rod 8 into the gap between the two second limiting blocks 16 is a snap-fit, which is existing technology. Those skilled in the art should understand its structure, principle, and usage, and will not be described in detail here. When the third insertion rod 8 slides out of the sleeve 7, rotating the gripping rod 15 causes it to snap between the two first limiting blocks 13, thereby restricting the sliding of the third insertion rod 8; conversely, after sliding into the sleeve 7, rotating the gripping rod 15 causes it to snap between the two second limiting blocks 16, achieving locking in the retracted state. Figure 2 As shown, the angle between the first insertion rod 5 and the second insertion rod 6 is 90°. The 90° angle design allows the first insertion rod 5 and the second insertion rod 6 to achieve horizontal and vertical limits respectively after the disc 3 rotates, thereby enhancing the locking stability.

[0022] Working principle:

[0023] When closing the protective door, rotate the two protective door panels 2 inward, then squeeze the operating cylinder 4 (compress the spring) and rotate the disc 3 towards the sleeve 7, then release the operating cylinder 4 (spring extends), and the second insert 6 abuts against the inner wall of the slot 9; then rotate the sleeve 7 towards the inside of the protective door panel 2, at which time the first insert 5 is inserted between the sleeve 7 and the protective door panel 2, and hold the handle 15 to slide the third insert 8 out of the sleeve 7, so that the third insert 8 is inserted into the slot 9, then rotate the handle 15 and lock it between the two first limit blocks 13, so that the third insert 8 abuts against the inner wall of the slot 9, thereby locking the two protective door panels 2.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A construction elevator protective door bolt device, comprising a door frame (1), the inner side of the door frame (1) is symmetrically provided with a protective door plate (2), and the two protective door plates (2) are both hinged with the door frame (1), characterized in that: One of the protective door panels (2) has a rotating disc (3) on its top. The disc (3) rotates parallel to the protective door panel (2). The side of the disc (3) away from the protective door panel (2) is elastically connected to an operating cylinder (4) by a spring. One end of the spring is fixed to the disc (3) and the other end is fixed to the operating cylinder (4). The operating cylinder (4) is fixed with a first insert (5) and a second insert (6). The other protective door panel (2) has a rotating sleeve (7) on its top. The sleeve (7) rotates toward the inside of the protective door panel (2). A third insert (8) is slidably disposed inside the sleeve (7). There is a locking component between the third insert (8) and the sleeve (7). The locking component is used to lock the position of the third insert (8). The door frame (1) has a slot (9) on its side wall near the top of the protective door panel (2). The slot (9) is used to limit the second insert (6) and the third insert (8).

2. A construction elevator protective door latch device according to claim 1, wherein: A bearing (10) is fixedly mounted on the top of one of the protective door panels (2). The rotation axis of the bearing (10) is perpendicular to the protective door panel (2). The disc (3) is fixedly mounted on the inner wall of the bearing (10).

3. A device for protecting the door of a construction elevator according to claim 1, characterized in that: Two mounting plates (11) are fixed on the other protective door panel (2). Each mounting plate (11) has a rotating shaft (12) rotatably mounted on it via a bearing (10). The two rotating shafts (12) are parallel and their axes are parallel to the plane of the protective door panel (2). The end of the sleeve (7) away from the opening is fixed between the two rotating shafts (12).

4. A construction elevator protective door latch apparatus as defined in claim 3 wherein: The locking assembly includes two first limiting blocks (13). The sleeve (7) has a through hole (14) parallel to the axial direction of the sleeve (7) on its side wall. The outer surface of the third insertion rod (8) is fixed with a grip (15). The grip (15) is located outside the sleeve (7). The third insertion rod (8) can rotate inside the sleeve (7). The two first limiting blocks (13) are fixed on the outer surface of the sleeve (7) near its opening end. There is a gap between the two first limiting blocks (13) for the grip (15) to drive the third insertion rod (8) to slide out of the sleeve (7) and rotate before inserting it into the gap.

5. A construction elevator door protector latch device as defined in claim 4 wherein: The locking assembly also includes two second limiting blocks (16), which are fixed on the outer surface of the other end of the sleeve (7). There is a gap between the two second limiting blocks (16) so that the gripping rod (15) can drive the third insert rod (8) to slide into the sleeve (7) and rotate before inserting into the gap.

6. A construction elevator protective door latch apparatus as defined in claim 3 wherein: The angle between the first insertion rod (5) and the second insertion rod (6) is 90°.

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