CN111648223A

CN111648223A - Retractable strides over ladder

Info

Publication number: CN111648223A
Application number: CN201911178637.9A
Authority: CN
Inventors: 张毅; 胡春梅; 唐冲
Original assignee: Tidfore Heavy Industry Co Ltd
Current assignee: Tidfore Heavy Industry Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-09-11

Abstract

The invention discloses a telescopic spanning ladder, which comprises a spanning vertical ladder, a fixed fence and a telescopic fence, wherein the spanning vertical ladder is of a planar ladder structure, the fixed fence and the telescopic fence are of semicircular protective fence structures, and the spanning vertical ladder, the fixed fence and the telescopic fence are respectively in two groups and symmetrically arranged at two sides of a truss; the planar structure of the crossing vertical ladder, the fixed fence and the telescopic fence is fixed on the truss, and the telescopic fence is sleeved outside the fixed fence. The invention adopts the telescopic spanning ladder to ensure the communication space of the truss by using the telescopic guardrail, and simultaneously adopts the fence type structure to improve the safety of the high-altitude spanning ladder under the condition of not occupying the walkway space of the truss; simple structure, convenient manufacture and operation and low manufacturing cost.

Description

Retractable strides over ladder

Technical Field

The invention relates to a telescopic spanning ladder, and belongs to the field of pipe belt machines.

Background

The pipe belt machine is a novel belt conveyor developed on the basis of ordinary belt conveyor, and it is the same to lean on the friction motion, and the interlude belt is circularly, utilizes the polygon (regular hexagon is best) bearing roller group of arranging according to a determining deviation to force and makes the sticky tape roll into the pipe form, guarantees that the material does not spill outward, can realize the space turn, adapts to complicated topographic condition, and promotes the angle height, is one of novel environmental protection continuous bulk cargo conveying equipment.

The spanning ladder is an indispensable component of various long-distance belt conveyors, is an important passage for field workers or managers to pass from one side of the conveyor to the other side, and is a short-cut passage when the conveyor is in an dangerous situation. Round tube belt conveyors are often used in field conveying systems due to their flexibility. The crossing ladder applied to the circular tube belt conveyor is often limited by geographical conditions, is applied at the high altitude of dozens of meters, and has a narrow walkway. At this time, convenience and safety of the spanning ladder are factors which must be concerned by the design.

At present, the two-side guardrail type crossing ladder as shown in figure 1 is mainly composed of a ladder stand and guardrails. The inspection personnel can climb from one side of the round pipe belt conveyor truss to the other side to inspect or replace components. The walkway width of the truss of the circular tube belt conveyor is generally narrow, so that the guardrail is often arranged at a higher position in order to not influence the passing of patrolmen. The crossing ladder can be applied to the place close to the ground and with a large walkway space, but is applied to the high altitude of dozens of meters, the safety coefficient of the narrow place of the walkway is low, and the safety inspection of workers on the walkway is influenced.

Disclosure of Invention

In view of the above problems in the prior art, the present invention is directed to a retractable step ladder based on retractable fences.

In order to achieve the purpose, the technical scheme of the telescopic spanning ladder adopted by the invention is as follows:

the retractable spanning ladder comprises a spanning vertical ladder, a fixed fence and a retractable fence, wherein the spanning vertical ladder is of a planar ladder structure, the fixed fence and the retractable fence are of semicircular protective fence structures, and the spanning vertical ladder, the fixed fence and the retractable fence are respectively in two groups and symmetrically arranged on two sides of the truss; the planar structure of the crossing vertical ladder, the fixed fence and the telescopic fence is fixed on the truss, and the telescopic fence is sleeved outside the fixed fence.

Preferably, the step-over vertical ladder comprises a ladder body, a connecting angle steel and a top walking board, wherein the connecting angle steel is used for fixing the ladder body on the truss, and the top walking board is spanned on the truss.

Preferably, the fixed fence comprises a guide rod, a fixed zipper and a fixed fence body, wherein the guide rod is vertically arranged at the outer edge of the fixed fence body.

Preferably, the guide rods comprise two first guide rods and two second guide rods, the second guide rods are one, the two first guide rods are arranged at two ends of the diameter of the semicircular fence, and the second guide rods are arranged in the middle of the arc of the fence body.

Preferably, flexible rail includes fixing rivet, sliding sleeve and flexible rail body, and sliding sleeve cover realizes sliding from top to bottom on the guide bar to it is flexible from top to bottom to drive flexible rail.

More preferably, the fixing rivets are arranged on two sides of the telescopic fence body and used for locking the position of the telescopic fence with the fixing zipper, and when the telescopic fence is in the upward-contracting state, the fixing zipper on the fixing fence can be sleeved on the fixing rivets on the telescopic fence for fixing.

More preferably, the number of the sliding sleeves is three, and the sliding sleeves are respectively sleeved at the outer edges of the three guide rods.

Preferably, the fixed fence is designed to take the climbing safety factor at high altitude into consideration, and adopts a fence structure. Meanwhile, the truss walkway is considered to be smooth and current, and the lowest height of the fixed fence is higher than the height of a common worker.

Preferably, the fixed fence body is welded with a first guide rod, a second guide rod and a fixed zipper.

The telescopic fence is in an upward contraction state when the spanning ladder is not used and is locked by a fixed zipper, so that the smoothness of a truss passageway is guaranteed; when the crossing ladder is used, a person can put down the telescopic fence at the upper climbing end firstly, wait to climb to the top of the truss, then upwards withdraw the telescopic fence at the upper climbing end and fix the telescopic fence with a fixing rivet through a fixing zipper, then put down the telescopic fence at the lower climbing end, wait for the person to safely reach the other side of the truss, withdraw and lock the telescopic fence at the lower climbing end.

Compared with the prior art, the retractable spanning ladder has the advantages that the retractable barrier is adopted, so that the communication space of the truss is ensured, and meanwhile, the fence type structure is adopted, so that the safety of the high-altitude spanning ladder is improved under the condition that the walkway space of the truss is not occupied; simple structure, convenient manufacture and operation and low manufacturing cost.

Drawings

FIG. 1 is a schematic view of a prior art two-sided hurdle type step ladder;

FIG. 2 is a schematic view of the retractable step-over ladder structure provided by the present invention;

3A, 3B and 3C are schematic structural views of the step-over vertical ladder provided by the invention;

fig. 4A and 4B are schematic structural views of the fixed fence provided by the present invention;

fig. 5 is a schematic structural view of the telescopic fence provided by the present invention.

Reference numerals

1. A truss; 2. spanning the vertical ladder; 21. a ladder body; 22. connecting angle steel; 23, a top walking board; 3. fixing the fence; 31. a first guide bar; 32. a second guide bar; 33. fixing the zipper; 34. fixing the fence body; 4. a telescopic fence; 41. fixing the rivet; 42. a sliding sleeve; 43. the flexible rail body.

Detailed Description

The retractable step-over ladder provided by the invention is further described in detail and completely by combining the embodiment. The following examples are illustrative only and are not to be construed as limiting the invention.

The experimental procedures in the following examples are conventional unless otherwise specified. The experimental materials used in the following examples were all commercially available unless otherwise specified.

As shown in fig. 2, the retractable step ladder in this embodiment includes a step ladder 2, a fixed fence 3 and a retractable fence 4, the step ladder 2 is a planar ladder structure, the fixed fence 3 and the retractable fence 4 are semicircular guard fence structures, and the planar structure of the step ladder 2, the fixed fence 3 and the retractable fence 4 is fixed on the truss 1. The crossing vertical ladder 2, the fixed fence 3 and the telescopic fence 4 are two groups and are symmetrically arranged on two sides of the truss 1. That is to say, the striding type vertical ladder 2 is fixed on the truss 1, and the telescopic fence 4 is sleeved outside the fixed fence 3.

As shown in fig. 3A, 3B and 3C, the crossing ladder 2 includes a ladder body 21, a connecting angle 22 and a top platform 23, wherein the connecting angle 22 is used for fixing the ladder body on the truss 1, the top platform 23 crosses over the truss 1, and the crossing ladder 2 can be climbed by workers to cross from one side to the other side of the round pipe belt conveyor truss 1.

As shown in fig. 4A and 4B, the fixed fence 3 includes two first guide rods 31, two second guide rods 32, a fixed zipper 33, and a fixed fence body 34, the number of the first guide rods 31 is one, the number of the second guide rods 32 is one, the first guide rods 31 and the second guide rods 32 are vertically disposed, the two first guide rods 31 are disposed at two ends of the diameter of the semicircular fence, and the second guide rods 32 are disposed at the middle of the arc of the fence body. The fixed zippers 33 are arranged on the two sides of the body of the fixed fence 3 in parallel with the guide rods and close to the truss 1. The fixed fence 3 adopts a fence structure in consideration of safety factors of climbing at high altitude. Meanwhile, the truss walkway is considered to be smooth and current, and the lowest height of the fixed fence 3 is higher than the height of a common worker. The fixed fence body 34 is welded with a first guide bar 31, a second guide bar 32 and a fixed zipper 33.

As shown in fig. 5, the telescopic fence 4 includes three fixing rivets 41, three sliding sleeves 42 and a telescopic fence body 43, wherein the three sliding sleeves 42 are respectively sleeved on the outer edges of the three guide rods, so that the telescopic fence 4 slides along the specified distance and path of the guide rods; the sliding sleeve 42 is sleeved on the guide rod to slide up and down, so that the telescopic fence 4 is driven to stretch up and down. The fixing rivets 41 are provided at both sides of the telescopic fence body 43 for locking with the fixing zipper 33 to fix the position of the telescopic fence 4. When the telescopic fence 4 is in the upward-contracting state, the fixing zipper 33 on the fixing fence can be sleeved on the fixing rivet 41 on the telescopic fence for fixing.

The telescopic fence 4 is in an upward contraction state when the spanning ladder is not used, and is locked by the fixed zipper 33, so that the smoothness of a truss walkway is guaranteed; when the crossing ladder is used, a person can put down the telescopic fence 4 at the upper climbing end firstly to climb to the top of the truss, then the telescopic fence 4 at the upper climbing end is upwards retracted and fixed with the fixing rivet 41 through the fixing zipper 33, then the telescopic fence 4 at the lower climbing end is put down, and when the person safely reaches the other side of the truss, the telescopic fence 4 at the lower climbing end is retracted and locked.

Finally, it must be said here that: the above embodiments are only used for further detailed description of the technical solutions of the present invention, and should not be understood as limiting the scope of the present invention, and the insubstantial modifications and adaptations made by those skilled in the art according to the above descriptions of the present invention are within the scope of the present invention.

Claims

1. A retractable spanning ladder is characterized by comprising a spanning vertical ladder (2), a fixed fence (3) and a retractable fence (4), wherein the spanning vertical ladder (2) is of a planar ladder structure, the fixed fence (3) and the retractable fence (4) are of semicircular protective fence structures, and the spanning vertical ladder (2), the fixed fence (3) and the retractable fence (4) are respectively divided into two groups which are symmetrically arranged at two sides of a truss (1); the planar structure of the crossing vertical ladder (2), the fixed fence (3) and the telescopic fence (4) is fixed on the truss (1), and the telescopic fence (4) is sleeved outside the fixed fence (3).

2. The telescopic step ladder according to claim 1, wherein the step ladder (2) comprises a ladder body (21), a connecting angle (22) and a top deck (23), wherein the connecting angle (22) is used for fixing the ladder body (21) on the truss (1), and the top deck (23) spans on the truss (1).

3. The ladder of claim 1, wherein the fixed fence (3) comprises a guide bar, a fixed zipper (33) and a fixed fence body (34), the guide bar is vertically arranged at the outer edge of the fixed fence body (34).

4. The retractable spanning ladder according to claim 3, wherein the guide rods comprise a first guide rod (31) and a second guide rod (32), the number of the first guide rods (31) is two, the number of the second guide rod (32) is one, the two first guide rods (31) are arranged at two ends of the diameter of the semicircular rail, and the second guide rod (32) is arranged in the middle of the arc of the rail body.

5. The ladder of claim 1, wherein the telescopic fence (4) comprises a fixing rivet 41, a sliding sleeve (42) and a telescopic fence body (43), the sliding sleeve (42) is sleeved on the guide rod to slide up and down, so that the telescopic fence (4) is driven to stretch up and down.

6. The ladder of claim 5, wherein fixing rivets 41 are provided on both sides of the telescopic fence body (43) for locking with the fixing zipper (33) to fix the position of the telescopic fence (4).

7. The ladder of claim 6, characterized in that when the telescopic fence (4) is in the upper retracted state, it is fixed by the fixing zipper (33) on the fixing fence on the fixing rivet (41) on the telescopic fence.

8. The ladder of claim 7, wherein the number of the sliding sleeves (42) is three, and the sliding sleeves are respectively sleeved on the outer edges of the three guide rods.

9. The telescopic step ladder according to claim 1, characterized in that the lowest height of the fixed fence (3) is higher than the height of a normal worker.

10. The ladder of claim 1, wherein the fixed fence body (34) is welded with a first guide bar (31), a second guide bar (32) and a fixed zipper (33).