Folding guardrail

Abstract

The invention discloses a folding guardrail, and relates to the technical field of elevator car top guardrails. The elevator car frame structure specifically comprises two symmetrically-arranged elevator car frame upper beams, two symmetrically-arranged side guardrails and a folding guardrail assembly, the folding guardrail assembly comprises a rear guardrail and a rotating guardrail, the two sides of the front face of the rear guardrail are fixedly connected with the two side guardrails, and a plurality of connecting cushion blocks are arranged at the top end of the rear guardrail; the top ends of the connecting cushion blocks are fixedly connected with the rotating guardrail, and a plurality of stainless steel hinges are arranged on the front faces of the connecting cushion blocks. According to the folding guardrail, the first contact switch assembly and the second contact switch assembly are matched with the rotating guardrail, operation of an elevator is interfered through the contact switch assemblies, when the first contact switch assembly is closed, the rotating guardrail is in a vertical state, and at the moment, the elevator cannot walk; and when the contact switch II is closed, the rotating guardrail is in a folded and flat state, and the elevator can normally walk at the moment, so that the personal safety of the maintenance personnel is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator car top guardrails, and particularly to a folding guardrail. Background Art

[0002] The elevator car top, in addition to being the top cover of the car, also serves as a working platform for the personnel operating on the elevator car top. The personnel operating on the car top mainly include installation, commissioning, inspection (factory inspection, supervision inspection and regular inspection), and maintenance personnel. There are various risks in the operation on the car top. In order to prevent accidents and protect the safety of personnel and property, a guardrail is provided on the car top.

[0003] After retrieval, a patent with the Chinese patent application number 202220140260.9 discloses an elevator car top guardrail, which includes a guardrail body and a rotating access railing; the bottom of the guardrail body is connected to the elevator car top, the guardrail body includes a guardrail opening provided on the front side, and one side of the rotating access railing is fixedly connected to the guardrail body and closes the guardrail opening; the rotating access railing includes a fixed rod, a rotating cross bar and a rotating vertical bar, the fixed rod is connected to the guardrail body, the top and bottom of the rotating cross bar are rotatably connected to the fixed rod, and the rotating vertical bar is arranged between and rotatably connected to the rotating cross bars; the guardrail body includes main vertical rods, main cross bars and reinforcing rods; the main vertical rods are arranged at the four corners of the elevator car top, and the main cross bars are sequentially connected to each main vertical rod; the upper part of the reinforcing rod is connected to the main cross bar, and the bottom is connected to the elevator car top.

[0004] The elevator car top guardrail in the above patent has the following deficiencies: This guardrail cooperates with the guardrail body through the rotating access railing to quickly rotate and open and close, facilitating the staff to enter and exit the elevator car top guardrail; however, in the actual use process, it is not easy for elevator maintenance personnel to control the actual operation of the elevator on the car top, that is, during the maintenance process, it is not convenient for the maintenance personnel to verify the maintenance results, and the maintenance personnel need to go up and down the car top multiple times, and the guardrail will instead cause a certain impact on the maintenance work of the maintenance personnel. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a folding guardrail.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A folding guardrail, comprising: two symmetrically arranged car frame upper beams, two symmetrically arranged side guardrails and a folding guardrail assembly, the folding guardrail assembly including a rear guardrail and a rotating guardrail, both side edges of the front of the rear guardrail are fixedly connected to the two side guardrails, a plurality of connecting pads are arranged at the top of the rear guardrail, the tops of the plurality of connecting pads are fixedly connected to the rotating guardrail, and a plurality of stainless steel hinges are arranged on the front of the connecting pads, and the plurality of stainless steel hinges are fixedly connected to both the rear guardrail and the rotating guardrail;

[0008] Contact switch assemblies one and two are respectively arranged on both sides of the rotating guardrail. The contact switch assembly one includes a safety door contact switch one and a mating contact plug one that cooperate with each other. The contact switch assembly two includes a safety door contact switch two and a mating contact plug two that cooperate with each other. The safety door contact switch one and the safety door contact switch two are fixedly connected to the rear guardrail, and the mating contact plug one and the mating contact plug two are fixedly connected to the rotating guardrail.

[0009] As a preferred embodiment of the present invention: a positioning bracket is fixedly installed at the bottom end of the safety door contact switch one, a mounting bracket is fixedly installed at the top end of the mating contact plug one, and a fixing bracket one is fixedly installed on the back of the mounting bracket.

[0010] As a preferred embodiment of the present invention: a mounting arm is fixedly installed on the back of the safety door contact switch two, and a fixing bracket two is fixedly installed at the top end of the mating contact plug two.

[0011] As a preferred embodiment of the present invention: support beams are fixedly installed at the tops of the two side guardrails, and reinforcing rib plates are fixedly connected to both side edges of the front of the support beams.

[0012] Based on the foregoing solution: a positioning connection seat is fixedly installed at the top of the support beam, a steel wire rope one is fixedly connected to the positioning connection seat, and a limit plug is fixedly connected to one end of the steel wire rope one.

[0013] Based on the foregoing solution: two limit jacks one are respectively opened at the top and bottom of the front of the support beam, two limit jacks two are opened at the top of the rotating guardrail, and an adaptation slot is opened at the top of the back of the support beam.

[0014] As a preferred embodiment of the present invention: a plurality of fixing pins are inserted at the bottom end of the rotating guardrail, a connecting ring is fixedly connected to the top end of the fixing pin, and a steel wire rope two is fixedly connected to the connecting ring.

[0015] As a preferred embodiment of the present invention: Rotating support arm assemblies are provided on both sides of the rotating guardrail. The rotating support arm assembly includes a first connecting arm and a second connecting arm that are rotatably connected. A rotating pin is inserted at the connection between the first connecting arm and the second connecting arm. A plurality of torsion springs are sleeved on the outer wall of the rotating pin, and the plurality of torsion springs are fixed to the first connecting arm and the second connecting arm respectively.

[0016] On the basis of the foregoing solution: A first rotating pin seat is rotatably connected to the top end of the first connecting arm, and the top end of the first rotating pin seat is fixedly connected to the rotating guardrail.

[0017] On the basis of the foregoing solution: A second rotating pin seat is rotatably connected to the bottom end of the second connecting arm, and the second rotating pin seat is fixedly installed on the back surface of the support beam.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. For this folding guardrail, in cooperation with the rotating guardrail through the first contact switch assembly and the second contact switch assembly, the operation of the elevator is interfered with by the contact switch assemblies. When the first contact switch assembly is closed, the rotating guardrail is in a vertical state, and at this time, the elevator cannot move; when the second contact switch is closed, the rotating guardrail is in a folded and laid - flat state, and at this time, the elevator can move normally, so as to ensure the personal safety of maintenance personnel.

[0020] 2. For this folding guardrail, the rotating guardrail is supported by the rotating support arm assembly, avoiding the rotating guardrail being affected by external forces during the folding process or the vertical process, resulting in collisions between the rotating guardrail and other components or injury to maintenance personnel, and improving the safety of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three - dimensional structure schematic diagram of the overall assembly of the present invention;

[0022] Figure 2 is for the present invention Figure 1 an enlarged structure schematic diagram of part A in;

[0023] Figure 3 is a partial cross - sectional structure schematic diagram of the overall assembly of the present invention;

[0024] Figure 4 is for the present invention Figure 3 an enlarged structure schematic diagram of part B in.

[0025] In the figure: 1. Upper beam of car frame; 2. Side guardrail; 3. Rear guardrail; 4. Rotating guardrail; 5. Support beam; 6. Reinforcing rib plate; 7. Positioning connection seat; 8. First steel wire rope; 9. Limit insertion block; 10. First limit insertion hole; 11. Connection cushion block; 12. Stainless steel hinge; 13. Positioning bracket; 14. First safety door contact switch; 15. Adapted contact plug one; 16. Installation bracket; 17. First fixing bracket; 18. First connecting arm; 19. Second connecting arm; 20. Limit boss; 21. First rotating pin seat; 22. Second rotating pin seat; 23. Installation support arm; 24. Second safety door contact switch; 25. Second fixing bracket; 26. Adapted contact plug two; 27. Second steel wire rope; 28. Connection ring; 29. Fixed bolt; 30. Second limit insertion hole. Detailed implementation mode

[0026] The technical solution of the present invention will be further described in detail below in conjunction with the detailed implementation mode.

[0027] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0028] A folding guardrail, as Figures 1 to 4 shown, includes: two symmetrically arranged upper beams 1 of the car frame, two symmetrically arranged side guardrails 2 and a folding guardrail assembly. The side guardrail 2 includes a first upper beam, and the first upper beam is fixed to the two upper beams 1 of the car frame by bolts. At the bottom end of the first upper beam, there are two first lower beams, and the two first lower beams are respectively arranged on both sides of the upper beam 1 of the car frame. At both ends of the top end of the first lower beam, a first support arm is fixedly installed, and the top ends of multiple first support arms are fixed to the first upper beam by bolts. And at equal intervals on the top ends of the two first lower beams, multiple first support columns are installed, and a support diagonal arm is welded between adjacent two support columns.

[0029] The folding guardrail assembly includes a rear guardrail 3 and a rotating guardrail 4. The rear guardrail 3 includes a second upper beam and a second lower beam. At both ends of the bottom of the second upper beam, a second support arm is fixedly installed, and the bottoms of the two second support arms are respectively fixed to both ends of the second lower beam. At equal intervals on the top end of the second lower beam, multiple second support columns are fixedly connected, a bracket is fixedly installed between adjacent two second support columns, and the top end of the second support column is fixedly connected to the second upper beam.

[0030] The rotating guardrail 4 includes an upper beam three and a lower beam three. At both ends of the lower beam three, support arms three are fixedly installed. The top ends of the support arms three are fixed to the upper beam three. And at the top end of the lower beam three, a support column three is fixedly installed. The top end of the support column three is fixed to the upper beam three. And between two adjacent support columns three, a stabilizing inclined arm one is fixedly installed. Between the support columns three, a stabilizing inclined arm two is fixedly installed. The length of the upper beam three is set to be 1.5 times that of the lower beam three, and the length of the upper beam three is the same as that of the upper beam two.

[0031] Refer to Figure 1 , the above-mentioned upper beam one, lower beam one, support column one, support arm one, support inclined arm, upper beam two, lower beam two, support column two, support arm two, upper beam three, lower beam three, support column three, support arm three, stabilizing inclined arm one and stabilizing inclined arm two are all selected according to actual needs, such as angle iron, square steel pipe, I-beam, round steel pipe, etc.

[0032] The two support arms two of the rear guardrail 3 and the support arms one of the two side guardrails 2 are fixedly connected by bolts. At the top end of the upper beam two of the rear guardrail 3, a plurality of connecting pads 11 are provided. The top ends of the plurality of connecting pads 11 are fixedly connected to the lower beam three of the rotating guardrail 4. And on the front surface of the connecting pads 11, a plurality of stainless steel hinges 12 are provided. The plurality of stainless steel hinges 12 are all fixedly connected to the lower beam three and the upper beam two by bolts.

[0033] Embodiment 1: On the basis of the foregoing content, a contact switch assembly one and a contact switch assembly two are added. When the contact switch assembly one is closed, the rotating guardrail 4 is in a vertical state, and at this time the elevator cannot move; when the contact switch two is closed, the rotating guardrail 4 is in a folded and laid-flat state, and at this time the elevator can move normally.

[0034] A contact switch assembly one and a contact switch assembly two are respectively arranged on both sides of the rotating guardrail 4. The contact switch assembly one includes a safety door contact switch one 14 and a matching contact plug one 15 that cooperate with each other. The contact switch assembly two includes a safety door contact switch two 24 and a matching contact plug two 26 that cooperate with each other. The safety door contact switch one 14 and the safety door contact switch two 24 are fixedly connected to the upper beam two. The matching contact plug one 15 and the matching contact plug two 26 are respectively fixedly connected to the two support arms three.

[0035] At the bottom end of the safety door contact switch one 14, a positioning bracket 13 is fixedly installed. The positioning bracket 13 is fixedly installed at the top end of the upper beam two by bolts. At the top end of the matching contact plug one 15, an installation bracket 16 is fixedly installed. On the back surface of the installation bracket 16, a fixing bracket one 17 is fixedly installed by bolts. The fixing bracket one 17 is fixedly connected to a support arm three by bolts.

[0036] On the back of the safety door contact switch two 24, an installation support arm 23 is fixedly installed. The installation support arm 23 is fixedly installed on the front of the second upper beam through bolts. At the top of the adapter contact plug two 26, a fixed support bracket two 25 is fixedly installed. The fixed support bracket two 25 is fixedly connected to another support arm three through bolts.

[0037] When this embodiment is in use, as Figure 1 shown, at this time, the adapter contact plug one 15 is inserted into the safety door contact switch one 14. At this time, the rotating guardrail 4 is in a vertical state, and the elevator cannot move. The maintenance personnel enter the elevator car top for maintenance. After the maintenance is completed, the maintenance personnel rotate the rotating guardrail 4 clockwise so that the third upper beam falls above the first upper beam. At this time, the adapter contact plug two 26 is inserted into the safety door contact switch two 24. At this time, the rotating guardrail 4 is in a folded and flat state, and the elevator can move normally. The maintenance personnel can control the elevator to move to judge the maintenance effect.

[0038] Embodiment two: On the basis of Embodiment one, a fixed bolt 29 and a support beam 5 are added. The fixed bolt 29 keeps the rotating guardrail 4 stable in the vertical state, and the support beam 5 keeps the rotating guardrail 4 stable in the folded and flat state.

[0039] At the top of the first upper beam of the two side guardrails 2, a support beam 5 is fixedly installed through bolts. On both sides of the front of the support beam 5, reinforcing rib plates 6 are welded. The reinforcing rib plates 6 are fixedly connected to the first upper beam through bolts.

[0040] At the top of the support beam 5, a threaded hole is opened. Inside the threaded hole, a positioning connection seat 7 is installed by threading. At the top of the positioning connection seat 7, an installation ring is welded. The installation ring is fixedly connected to a first steel wire rope 8. One end of the first steel wire rope 8 is fixedly connected to a limit insertion block 9. The limit insertion block 9 includes a handle and two insertion rods. The two insertion rods are welded to the back of the handle.

[0041] On the top and bottom of the front of the support beam 5, two first limit insertion holes 10 are opened. When the rotating guardrail 4 is in the vertical state, the two insertion rods of the limit insertion block 9 are inserted into the two lower first limit insertion holes 10. At the top of the rotating guardrail 4, two second limit insertion holes 30 are opened, and at the top of the back of the support beam 5, an adapter slot is opened. The adapter slot is communicated with the two upper first limit insertion holes 10. When the rotating guardrail 4 is in the folded and flat state, the two upper first limit insertion holes 10 correspond to the two second limit insertion holes 30. Through the handle, the two insertion rods are inserted into the first limit insertion holes 10 and the second limit insertion holes 30 to fold and fix the rotating guardrail 4.

[0042] A plurality of fixed pins 29 are inserted into the upper surface of the lower beam three at the bottom end of the rotating guardrail 4. The fixed pins 29 penetrate through the lower beam three and the upper beam two, and a connecting ring 28 is integrally formed on the fixed pins 29. A second steel wire 27 is fixedly connected to the connecting ring 28. A steel wire hole is formed in the first stabilizing inclined arm. One end of the second steel wire 27 is fixed inside the steel wire hole.

[0043] On the basis of the first embodiment, when in use in this embodiment, when the rotating guardrail 4 is in the vertical state, the fixed pins 29 are inserted into the lower beam three and the upper beam two to fix the rotating guardrail 4 to the rear guardrail 3 and keep the rotating guardrail 4 in a vertical state; when the rotating guardrail 4 is in the folded and laid-flat state, two insertion rods are inserted into the first limiting insertion hole 10 and the second limiting insertion hole 30 through the handle to fold and fix the rotating guardrail 4, so that the rotating guardrail 4 is fixed to the support beam 5.

[0044] Embodiment Three: On the basis of the first and second embodiments, a rotating support arm assembly is added to support the rotating guardrail 4 to prevent the rotating guardrail 4 from colliding with other components or injuring maintenance personnel due to external forces during the folding or vertical process, thereby improving the safety of the maintenance work.

[0045] Rotating support arm assemblies are arranged on both sides of the rotating guardrail 4. The rotating support arm assembly includes a connecting arm one 18 and a connecting arm two 19 that are rotatably connected. A rotating pin is inserted at the connection between the connecting arm one 18 and the connecting arm two 19. A plurality of coil springs are sleeved on the outer wall of the rotating pin. The plurality of coil springs are divided into two groups. The inner ends of the coil springs are fixed to the rotating pin, and the outer ends of the coil springs are respectively fixed to the connecting arm one 18 and the connecting arm two 19. When the connecting arm one 18 and the connecting arm two 19 are as Figure 2 shown, that is, when the rotating guardrail 4 is in the vertical state, the coil springs are in a semi-tightened state at this time. When the rotating guardrail 4 is in the folded and laid-flat state, the coil springs are in a fully tightened state.

[0046] A limiting boss 20 is welded to one end of the connecting arm one 18 close to the connecting arm two 19. The top end of the limiting boss 20 is attached to the connecting arm two 19 to keep the connecting arm one 18 and the connecting arm two 19 stable. When the connecting arm one 18 and the connecting arm two 19 deflect relatively, the connection part (rotating pin) between the two can only move in the direction of the upper beam two.

[0047] The top end of the connecting arm one 18 is rotatably connected to a first rotating pin seat 21 through a retaining pin. The top end of the first rotating pin seat 21 is fixedly connected to the upper beam three of the rotating guardrail 4; the bottom end of the connecting arm two 19 is rotatably connected to a second rotating pin seat 22 through a retaining pin. The second rotating pin seat 22 is fixedly installed on the back of the support beam 5.

[0048] Based on the first and second embodiments, when this embodiment is in use, when the fixing pin 29 and the limit insert block 9 are not installed, when the guardrail 4 rotates, under the action of its own gravity, it will deflect towards the support frame beam 5. Under the action of the elastic force generated by the contraction of multiple coil springs, the guardrail 4 maintains an inclined state and will not hit the support frame beam 5. If it is necessary to cooperate the upper beam three with the support frame beam 5, a downward force needs to be applied to the upper beam three, and then it is fixed through the limit insert block 9. If it is necessary to keep the guardrail 4 in a vertical state, an upward force needs to be applied to the upper beam three, and then it is fixed through the fixing pin 29.

[0049] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A folding guardrail, characterized in that, it includes: Two symmetrically arranged car frame upper beams (1), two symmetrically arranged side guardrails (2) and a folding guardrail assembly. The folding guardrail assembly includes a rear guardrail (3) and a rotating guardrail (4). The two side edges on the front of the rear guardrail (3) are fixedly connected to the two side guardrails (2). A plurality of connecting pads (11) are arranged at the top of the rear guardrail (3). The tops of the plurality of connecting pads (11) are fixedly connected to the rotating guardrail (4). And a plurality of stainless steel hinges (12) are arranged on the front of the connecting pads (11). The plurality of stainless steel hinges (12) are fixedly connected to both the rear guardrail (3) and the rotating guardrail (4); On both sides of the rotating guardrail (4), a first contact switch assembly and a second contact switch assembly are respectively arranged. The first contact switch assembly includes a safety door contact switch one (14) and a matching contact plug one (15) that cooperate with each other. The second contact switch assembly includes a safety door contact switch two (24) and a matching contact plug two (26) that cooperate with each other. The safety door contact switch one (14) and the safety door contact switch two (24) are fixedly connected to the rear guardrail (3). The matching contact plug one (15) and the matching contact plug two (26) are fixedly connected to the rotating guardrail (4).

2. A folding guardrail according to claim 1, characterized in that: A positioning bracket (13) is fixedly installed at the bottom end of the safety door contact switch one (14). An installation bracket (16) is fixedly installed at the top end of the matching contact plug one (15). A first fixed bracket (17) is fixedly installed on the back of the installation bracket (16).

3. A folding guardrail according to claim 1, characterized in that: An installation arm (23) is fixedly installed on the back of the safety door contact switch two (24). A second fixed bracket (25) is fixedly installed at the top end of the matching contact plug two (26).

4. A folding guardrail according to claim 1, characterized in that: Support beams (5) are fixedly installed at the tops of the two side guardrails (2). Reinforcing rib plates (6) are fixedly connected to both side edges on the front of the support beams (5).

5. A folding guardrail according to claim 4, characterized in that: A positioning connection seat (7) is fixedly installed at the top of the support beam (5). The positioning connection seat (7) is fixedly connected to a first steel wire rope (8). One end of the first steel wire rope (8) is fixedly connected to a limit insertion block (9).

6. A folding guardrail according to claim 4, characterized in that: Two first limit insertion holes (10) are respectively opened at the top and bottom of the front of the support beam (5). Two second limit insertion holes (30) are opened at the top of the rotating guardrail (4). And an adaptation card slot is opened at the top of the back of the support beam (5).

7. A folding guardrail according to claim 1, characterized in that: A plurality of fixed pins (29) are inserted at the bottom end of the rotating guardrail (4). A connecting ring (28) is fixedly connected to the top end of the fixed pin (29), and a second steel wire rope (27) is fixedly connected to the connecting ring (28).

8. A folding guardrail according to claim 1, wherein: Rotating support arm assemblies are arranged on both sides of the rotating guardrail (4). The rotating support arm assembly includes a first connecting arm (18) and a second connecting arm (19) which are rotatably connected. A rotating pin is inserted at the connection between the first connecting arm (18) and the second connecting arm (19). A plurality of coil springs are sleeved on the outer wall of the rotating pin, and the plurality of coil springs are respectively fixed to the first connecting arm (18) and the second connecting arm (19).

9. A folding guardrail according to claim 8, wherein: A first rotating pin seat (21) is rotatably connected to the top end of the first connecting arm (18), and the top end of the first rotating pin seat (21) is fixedly connected to the rotating guardrail (4).

10. A folding guardrail according to claim 8, wherein: A second rotating pin seat (22) is rotatably connected to the bottom end of the second connecting arm (19), and the second rotating pin seat (22) is fixedly installed on the back surface of the support beam (5).

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