Universal sliding movable joint guardrail for folding escalator on bridge girder erection machine
By designing a universal sliding hinge guardrail on the bridge erecting machine, the problem of insufficient protection at the hinge joint of the folding ladder was solved, and automatic adjustment under different working conditions was achieved to meet the protection requirements of the angle change.
Patent Information
- Application Number
- CN202422712609.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-07
AI Technical Summary
On bridge erecting machines, there is a lack of effective protective measures at the hinged joint of the two ladders of the folding ladder, and the angle between the ladders often changes, which makes the existing guardrail structure unable to meet the usage requirements.
Design a universal sliding joint guardrail, including a primary ladder frame and a secondary ladder frame. By installing universal joints and guide sleeves on the handrail supports, the guardrail and locking clips can automatically adjust to adapt to the angle changes under different working conditions.
It enables automatic adjustment of the orientation and length of the movable railing under different pier heights and angles, ensuring effective protection. The structure is simple, the operation is convenient, and the need for manual adjustment is reduced.
Smart Images
Figure CN223510840U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of auxiliary devices for road and bridge construction, specifically to a universal sliding joint guardrail for a folding ladder on a bridge erecting machine. Background Technology
[0002] Bridge erecting machines are heavy engineering machinery used in road and bridge construction. When using bridge erecting machines to erect viaducts, scaffolding ladders are often erected on the side of the currently erected bridge to facilitate quick access for operators. However, as construction continues, the precast bridge gradually extends forward, and the bridge erecting machine also moves forward accordingly. Because of the stability requirements at the bottom, the scaffolding ladders cannot move with the machine, so they must be re-erected at the new work site. This increases construction costs, and the repeated erection of ladders also leads to project delays. The applicant has designed a solution to address these problems, such as... Figure 1 The invention describes a folding ladder assembly that uses an electric hoist on the crossbeam between columns 2 and 3 of the bridge erecting machine to provide tension, thereby changing the height of the ladder located on the side of column 2. However, during testing, the applicant found that there was a lack of effective protective measures at the hinged joint of the two ladders. Also, since the working height of the bridge erecting machine relative to the ground often changes, the angle between the ladders also frequently changes. Therefore, it is necessary to design an adjustable hinged guardrail that can meet the needs of different working conditions. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a universal sliding hinge guardrail for folding ladders on bridge erecting machines, so as to solve the problem that there is a lack of effective protection measures at the hinge position of two ladders, and the angle between the ladders often changes, and the general guardrail structure cannot meet the usage requirements.
[0004] To solve the above problems, this utility model provides the following technical solution:
[0005] A universal sliding hinged guardrail for a folding ladder on a bridge erecting machine; it includes a primary ladder frame and a secondary ladder frame; the bottom end of the primary ladder frame and the top end of the secondary ladder frame are hinged to each other; guardrails are provided on the sides of both the primary and secondary ladder frames; handrail supports are installed at the top of the guardrails; handrail cables are installed on the handrail supports; universal joints are provided on two adjacent handrail supports on the bottom end of the primary ladder frame and the secondary ladder frame; positioning clips and guide sleeves are respectively installed on the two universal joints; a movable guardrail is installed on the positioning clip; one end of the movable guardrail is movably inserted through the guide sleeve.
[0006] Preferably, the handrail support includes a vertical post perpendicular to the guardrail; a stiffening plate or reinforcing bar is provided between the post and the guardrail.
[0007] Further, gaps are left between the upper and lower opposite handrail supports of the first and second ladder frames, and reinforcing rods are arranged at the gaps; the universal joints are mounted on the reinforcing rods.
[0008] Preferably, two handrail cables are arranged, and are arranged at upper and middle positions of the handrail supports; the universal joints are correspondingly arranged at middle positions between the two handrail cables.
[0009] Preferably, ear plates are arranged at ends of the upper and lower opposite guardrails of the first and second ladder frames, and chains are mounted between the ear plates; when the chains are stretched into a straight line, the movable guardrail can be just pulled out of the guide sleeve.
[0010] Preferably, locking clamps are further mounted on the guide sleeves; the locking clamps are used for locking the movable guardrail, and preventing the movable guardrail from moving in the guide sleeve.
[0011] The utility model has the advantages of:
[0012] The movable guardrail can meet the use requirements under different pier height conditions, and after the included angle between the ladders changes, the orientation of the movable guardrail is changed through the universal joint, and the effective working length of the movable guardrail between the handrail supports is changed through the guide sleeve; the utility model has the advantages of simple structure and convenient operation, and after the locking clamps are opened, the orientation and length of the movable guardrail can be automatically changed without manual adjustment, so that the use under different working conditions is effectively ensured. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 is a schematic diagram of a folding ladder designed by the applicant in the background art;
[0014] Figure 2 is a structural schematic diagram of the utility model in the embodiment;
[0015] Figure 3 is Figure 2 is a local enlarged schematic diagram of the movable guardrail position in the embodiment;
[0016] Marked: 1, first ladder frame, 2, second ladder frame, 3, guardrail, 4, handrail support, 5, handrail cable, 6, universal joint, 7, positioning clamp, 8, guide sleeve, 9, movable guardrail, 10, chain, 11, locking clamp. DETAILED DESCRIPTION
[0017] The utility model will be further introduced in combination with the drawings and specific embodiments:
[0018] Embodiment:
[0019] Refer to Figure 1The embodiment provides a universal sliding hinge guardrail for a folding escalator on a bridge machine; it comprises a first ladder frame 1 and a second ladder frame 2; the bottom end of the first ladder frame 1 is hingedly connected with the top end of the second ladder frame 2; a guardrail 3 is arranged on the side of the first ladder frame 1 and the second ladder frame 2; a handrail support rod 4 is arranged on the top of the guardrail 3; a handrail cable 5 is arranged on the handrail support rod 4; a universal joint 6 is arranged on two handrail support rods 4 adjacent to each other on the bottom end of the first ladder frame 1 and the second ladder frame 2; a positioning clamp head 7 and a guide sleeve 8 are respectively arranged on the two universal joints 6; a movable guardrail 9 is arranged on the positioning clamp head 7; one end of the movable guardrail 9 is movably arranged through the guide sleeve 8.
[0020] The handrail support rod 4 comprises a vertical rod 4A perpendicular to the guardrail 3; a rib plate 4B or a reinforcing rod 4C is arranged between the vertical rod 4A and the guardrail 3.
[0021] Gaps are left between the upper and lower handrail support rods of the first ladder frame 1 and the second ladder frame 2, and the reinforcing rods 4C are arranged at the gaps; the universal joints are arranged on the reinforcing rods 4C.
[0022] The handrail cable 5 is arranged in two parts, and is arranged at the upper part and the middle part of the handrail support rod 4; the universal joint 6 is arranged at the middle part between the two handrail cables 5.
[0023] Ears are arranged at the ends of the upper and lower guardrails 3 of the first ladder frame 1 and the second ladder frame 2, and a chain 10 is arranged between the ears; when the chain 10 is stretched into a straight line, the movable guardrail 9 can be just pulled out of the guide sleeve 8.
[0024] A locking clamp 11 is further arranged on the guide sleeve 8; the locking clamp 11 is used for locking the movable guardrail 9 and preventing the movable guardrail 9 from moving in the guide sleeve 8.
[0025] When the utility model device is used, the locking clamp needs to be loosened first, so that the movable guardrail can freely slide on the guide sleeve; then, with the change of the angle between the ladder frames, the two universal joints are rotated, and the movable guardrail is correspondingly adjusted relative to the guide sleeve; when the relative state of the two ladder frames is stable, the locking clamp is locked again, and the installation of the movable guardrail is completed.
Claims
1. A universal sliding knuckle guard rail for folding staircases on a bridge machine, characterized in that: It includes a first ladder frame (1) and a second ladder frame (2); the bottom end of the first ladder frame (1) and the top end of the second ladder frame (2) are hingedly connected to each other; guardrails (3) are arranged on the side of the first ladder frame (1) and the second ladder frame (2); handrail support rods (4) are installed on the top of the guardrails (3); handrail cables (5) are installed on the handrail support rods (4); universal joints (6) are arranged on the two handrail support rods (4) adjacent to each other at the bottom end of the first ladder frame (1) and the second ladder frame (2); positioning clamps (7) and guide sleeves (8) are respectively installed on the two universal joints (6); movable guardrails (9) are installed on the positioning clamps (7); one end of the movable guardrails (9) is movably arranged through the guide sleeves (8).
2. A universal sliding hinge guard for a folding ramp of a bridging machine according to claim 1, characterized in that: The handrail support rods (4) include vertical rods (4A) perpendicular to the guardrails (3); between the vertical rods (4A) and the guardrails (3), there are rib plates (4B) or reinforcing rods (4C).
3. A universal sliding hinge guard for a folding escalator on a bridging machine according to claim 2, characterized in that: Gaps are left between the upper and lower opposing handrail supports of the first ladder frame (1) and the second ladder frame (2), and reinforcing rods (4C) are arranged at the gaps; the universal joints are installed on the reinforcing rods (4C).
4. A universal sliding hinge guard for a folding ramp of a bridging machine according to claim 1, characterized in that: The handrail cables (5) are arranged in two, and are arranged at the upper and middle positions of the handrail support rods (4); the universal joints (6) are correspondingly arranged at the middle positions between the two handrail cables (5).
5. A universal sliding hinge guard for a folding ramp of a bridging machine according to claim 1, characterized in that: Ear plates are arranged at the ends of the upper and lower opposing guardrails (3) of the first ladder frame (1) and the second ladder frame (2), and chains (10) are installed between the ear plates; when the chains (10) are stretched into a straight line, the movable guardrails (9) can be exactly pulled out of the guide sleeves (8).
6. A universal sliding hinge guard for a folding stairway on a bridging machine according to claim 1, wherein: Locking clamps (11) are also installed on the guide sleeves (8); the locking clamps (11) are used for locking the movable guardrails (9) and preventing them from moving in the guide sleeves (8).