阅读说明：本技术 罐式集装箱及其扶手栏杆 (Tank container and handrail thereof ) 是由 曹雄 朱红军 傅卫星 周钰 于 2020-05-18 设计创作，主要内容包括：本发明提供了一种罐式集装箱及其扶手栏杆。扶手栏杆包括在沿罐式集装箱的长度方向上前后相接的第一栏杆单元和第二栏杆单元,以及联动机构。第一栏杆单元和第二栏杆单元能够同时相背运动而竖立于框架顶部,或同时相向运动而折叠收起。联动机构包括第一转动轮和第二转动轮。第一转动轮与第一栏杆单元固定连接；第一转动轮的外周具有第一啮合齿；第二转动轮与第二栏杆单元固定连接；第二转动轮的外周具有第二啮合齿,第二啮合齿与第一啮合齿啮合,而使第一栏杆单元和第二栏杆单元同时运动。联动机构通过第一转动轮和第二转动轮的相互啮合,即可实现第一栏杆单元和第二栏杆单元的同时运动,结构稳定,装配简单。(The invention provides a tank container and a handrail thereof. The hand rail includes a first rail unit and a second rail unit which are coupled to each other in a front-rear direction along a length direction of the tank container, and a linkage mechanism. The first railing unit and the second railing unit can move back and forth at the same time to be erected on the top of the frame or move towards each other at the same time to be folded and folded. The linkage mechanism comprises a first rotating wheel and a second rotating wheel. The first rotating wheel is fixedly connected with the first railing unit; the periphery of the first rotating wheel is provided with first meshing teeth; the second rotating wheel is fixedly connected with the second railing unit; the periphery of the second rotating wheel is provided with a second meshing tooth, and the second meshing tooth is meshed with the first meshing tooth, so that the first railing unit and the second railing unit can move simultaneously. The linkage mechanism can realize simultaneous movement of the first railing unit and the second railing unit through mutual meshing of the first rotating wheel and the second rotating wheel, and is stable in structure and simple to assemble.)

1. A hand rail of a tank container is arranged at two sides of the top of a frame of the tank container and is characterized by comprising a first rail unit, a second rail unit and a linkage mechanism, wherein the first rail unit and the second rail unit are connected in front and back along the length direction of the tank container; the first railing unit and the second railing unit can move back and forth at the same time to be erected on the top of the frame or move towards each other at the same time to be folded and folded;

the link gear includes:

the first rotating wheel is fixedly connected with the first railing unit; the periphery of the first rotating wheel is provided with first meshing teeth;

the second rotating wheel is fixedly connected with the second railing unit; the periphery of the second rotating wheel is provided with a second meshing tooth, and the second meshing tooth is meshed with the first meshing tooth, so that the first railing unit and the second railing unit can move simultaneously.

2. The handrail of claim 1, wherein the first rotating wheel and the second rotating wheel are offset from one another.

3. The handrail of claim 2, wherein a line between the axes of the first and second rotatable wheels forms an angle of 30 ° to 60 ° with a horizontal plane.

4. The handrail of claim 1, wherein the first rotating wheel has an arc with a central angle of not less than 120 ° circumferentially overlapping the first engagement tooth;

the central angle of the arc of the second meshing tooth covered on the periphery of the second rotating wheel is not less than 120 degrees.

5. The hand rail of claim 1, wherein the first rotation wheel is fixedly connected with the first rail unit by a first rotation shaft rod extending in a width direction of the tank container;

the second rotating wheel is fixedly connected with the second railing unit railing through a second rotating shaft rod, and the second rotating shaft rod extends along the width direction of the tank container.

6. The hand rail of claim 5, wherein the first and second pivot rods are mounted to the frame by connection plates and support plates, the connection plates and the support plates being spaced apart in parallel in a width direction of the tank container;

the connecting plate is positioned on the side surface of the footpath of the tank container, and is provided with openings through which the first rotating shaft rod and the second rotating shaft rod respectively pass;

the supporting plate is located below the frame and fixedly connected with the frame, and a through hole for the first rotating shaft rod and the second rotating shaft rod to pass through is formed in the supporting plate.

7. The handrail of claim 6, wherein a first stop pin and a second stop pin are disposed on one side of the support plate, and the first stop pin and the second stop pin are both located between the support plate and the connecting plate and adjacent to the support plate;

a first limiting hole is formed in the first rotating shaft rod, the axis of the first limiting hole is perpendicular to the axis of the first rotating shaft rod, and the first limiting pin is inserted into the first limiting hole;

and a second limiting hole is formed in the second rotating shaft rod, the axis of the second limiting hole is perpendicular to the axis of the second rotating shaft rod, and the second limiting pin is inserted into the second limiting hole.

8. The handrail of claim 7, wherein a first retaining ring is disposed between the support plate and the first limit pin, the first retaining ring is rotatably disposed on the first rotating shaft, and the first retaining ring is rotatable relative to the support plate;

a second retainer ring is further arranged between the support plate and the second limiting pin, the second retainer ring is rotatably sleeved on the second rotating shaft rod, and the second retainer ring is rotatable relative to the support plate.

9. The handrail of claim 1, wherein the first balustrade unit comprises a first longitudinal balustrade, a first transverse balustrade and a plurality of first vertical balustrades spaced apart; the first longitudinal rail extends along the length direction of the tank container, and the first transverse rail extends along the width direction of the tank container and is connected to one end of the first longitudinal rail, which is far away from the second rail unit; the upper end of each first vertical railing is hinged with the first longitudinal railing, the lower end of each first vertical railing is hinged with the top of the frame, and one first vertical railing is fixedly connected with the first rotating wheel; when each first vertical railing rotates towards the second railing unit, the first railing unit is folded and folded;

the second railing unit comprises a second longitudinal railing, a second transverse railing and a plurality of second vertical railings arranged at intervals; the second longitudinal rail extends along the length direction of the tank container, and the second transverse rail extends along the width direction of the tank container and is connected to one end of the second longitudinal rail, which is far away from the first rail unit; the upper end of each second vertical railing is hinged with the second longitudinal railing, the lower end of each second vertical railing is hinged with the top of the frame, and one second vertical railing is fixedly connected with the second rotating wheel; when each second vertical railing rotates towards the first railing unit, the second railing unit is folded and folded.

10. The handrail of claim 9, wherein the second vertical rail comprises two parallel spaced apart upper and lower vertical post sections and an angled section connecting a bottom of the upper vertical post section to a top of the lower vertical post section.

11. The handrail of claim 9, further comprising a union bracket disposed in correspondence with the linkage;

the combined bracket is provided with a first positioning groove with an opening facing the first vertical railing and a second positioning groove with an opening facing the second vertical railing, and the first positioning groove and the second positioning groove are respectively positioned at two opposite ends of the combined bracket.

12. The hand rail of claim 11, further comprising first and second brackets located at both ends of the joint bracket, respectively, in a length direction of the tank container;

the first bracket is arranged corresponding to the first vertical rail and is provided with a first clamping groove with an opening facing the first vertical rail;

the second bracket is arranged corresponding to the second vertical railing and is provided with a second clamping groove with an opening facing the second vertical railing.

13. The handrail of claim 9, further comprising a stop, wherein at least one stop is provided on each side of the top of the frame;

each limiting part comprises a fixed plate and a limiting plate which are hinged with each other; the fixed plate is connected to the outer side of the footpath of the tank container, and the limiting plate can rotate from top to bottom to a horizontal position and is locked at the horizontal position; the limiting plate is provided with a limiting clamping groove; when the limiting plate is in a horizontal position, the opening of the limiting clamping groove faces the first vertical rail or the second vertical rail, and the first vertical rail or the second vertical rail in the standing state can be clamped and fixed to keep the first rail unit and the second rail unit in the unfolding state; when the limiting plate is turned upwards to enable the first vertical railing or the second vertical railing to be separated from the limiting clamping groove, the first vertical railing or the second vertical railing can rotate downwards, and the first railing unit and the second railing unit are folded and folded.

14. A tank container, which comprises a tank body and a frame arranged outside the tank body in an enclosing mode, wherein the handrail as claimed in any one of claims 1 to 13 is further arranged on two sides of the top of the frame.

Technical Field

The present invention relates to a container and fittings thereon, and more particularly, to a tank container and a hand rail structure thereon.

Background

In order to reduce the risk of operating personnel operating at the top of the tank container as much as possible, folding handrails are installed on one side or two sides of the top of most tank containers at present, when the tank container is required to be used, the handrails are opened and erected to a certain height so as to prevent the operating personnel from falling down from the top of the tank container, the operation safety is ensured, and when the tank container is not used, the handrails are folded at the top of the tank container so as to facilitate transportation.

At present, the handrail that tank container was used commonly is mostly to expand from the front end to the rear end to regional abundant protection of providing to personnel's more rear end and middle part of moving about. However, due to the space limitation of folding the handrail, it is difficult to fully cover the front end area with the length of the handrail, and the safety performance is relatively weak. Where some front ends also require more personnel activity, and where customers emphasize top operational safety, it is difficult to fully meet their diverse configuration requirements.

Disclosure of Invention

The invention aims to provide a hand rail capable of covering the front end area of a tank container and the tank container adopting the hand rail, so as to solve the problem that the hand rail in the prior art cannot cover the front end area.

In order to solve the technical problems, the invention provides a hand rail of a tank container, which is arranged at two sides of the top of a frame of the tank container and comprises a first rail unit, a second rail unit and a linkage mechanism, wherein the first rail unit and the second rail unit are connected in front and back along the length direction of the tank container; the first railing unit and the second railing unit can move back and forth at the same time to be erected on the top of the frame or move towards each other at the same time to be folded and folded; the link gear includes: the first rotating wheel is fixedly connected with the first railing unit; the periphery of the first rotating wheel is provided with first meshing teeth; the second rotating wheel is fixedly connected with the second railing unit; the periphery of the second rotating wheel is provided with a second meshing tooth, and the second meshing tooth is meshed with the first meshing tooth, so that the first railing unit and the second railing unit can move simultaneously.

In one embodiment, the first rotating wheel and the second rotating wheel are arranged in a vertically staggered manner.

In one embodiment, an angle between a horizontal plane and a connecting line between the axis of the first rotating wheel and the axis of the second rotating wheel is 30 ° to 60 °.

In one embodiment, the central angle of the arc of the first rotating wheel covered with the first engaging tooth at the periphery is not less than 120 °; the central angle of the arc of the second meshing tooth covered on the periphery of the second rotating wheel is not less than 120 degrees.

In one embodiment, the first rotating wheel is fixedly connected to the first rail unit by a first rotating shaft rod extending in a width direction of the tank container; the second rotating wheel is fixedly connected with the second railing unit railing through a second rotating shaft rod, and the second rotating shaft rod extends along the width direction of the tank container.

In one embodiment, the first and second rotation shafts are mounted on the frame through connection plates and support plates, which are disposed in parallel at intervals in a width direction of the tank container; the connecting plate is positioned on the side surface of the footpath of the tank container, and is provided with openings through which the first rotating shaft rod and the second rotating shaft rod respectively pass; the supporting plate is located below the frame and fixedly connected with the frame, and a through hole for the first rotating shaft rod and the second rotating shaft rod to pass through is formed in the supporting plate.

In one embodiment, a first limit pin and a second limit pin are arranged on one side of the support plate, and the first limit pin and the second limit pin are both positioned between the support plate and the connecting plate and close to the support plate; a first limiting hole is formed in the first rotating shaft rod, the axis of the first limiting hole is perpendicular to the axis of the first rotating shaft rod, and the first limiting pin is inserted into the first limiting hole; and a second limiting hole is formed in the second rotating shaft rod, the axis of the second limiting hole is perpendicular to the axis of the second rotating shaft rod, and the second limiting pin is inserted into the second limiting hole.

In one embodiment, a first retainer ring is further disposed between the support plate and the first limit pin, the first retainer ring is rotatably sleeved on the first rotating shaft rod, and the first retainer ring is rotatable relative to the support plate; a second retainer ring is further arranged between the support plate and the second limiting pin, the second retainer ring is rotatably sleeved on the second rotating shaft rod, and the second retainer ring is rotatable relative to the support plate.

In one embodiment, the first rail unit comprises a first longitudinal rail, a first transverse rail and a plurality of first vertical rails arranged at intervals; the first longitudinal rail extends along the length direction of the tank container, and the first transverse rail extends along the width direction of the tank container and is connected to one end of the first longitudinal rail, which is far away from the second rail unit; the upper end of each first vertical railing is hinged with the first longitudinal railing, the lower end of each first vertical railing is hinged with the top of the frame, and one first vertical railing is fixedly connected with the first rotating wheel; when each first vertical railing rotates towards the second railing unit, the first railing unit is folded and folded; the second railing unit comprises a second longitudinal railing, a second transverse railing and a plurality of second vertical railings arranged at intervals; the second longitudinal rail extends along the length direction of the tank container, and the second transverse rail extends along the width direction of the tank container and is connected to one end of the second longitudinal rail, which is far away from the first rail unit; the upper end of each second vertical railing is hinged with the second longitudinal railing, the lower end of each second vertical railing is hinged with the top of the frame, and one second vertical railing is fixedly connected with the second rotating wheel; when each second vertical railing rotates towards the first railing unit, the second railing unit is folded and folded.

In one embodiment, the second vertical rail comprises an upper vertical rod section and a lower vertical rod section which are arranged in parallel at an interval, and an inclined section which connects the bottom of the upper vertical rod section and the top of the lower vertical rod section.

In one embodiment, the handrail further comprises a joint bracket disposed corresponding to the linkage; the combined bracket is provided with a first positioning groove with an opening facing the first vertical railing and a second positioning groove with an opening facing the second vertical railing, and the first positioning groove and the second positioning groove are respectively positioned at two opposite ends of the combined bracket.

In one embodiment, the hand rail further comprises a first bracket and a second bracket respectively located at both ends of the joint bracket along a length direction of the tank container; the first bracket is arranged corresponding to the first vertical rail and is provided with a first clamping groove with an opening facing the first vertical rail; the second bracket is arranged corresponding to the second vertical railing and is provided with a second clamping groove with an opening facing the second vertical railing.

In one embodiment, the handrail further comprises a stopper, and at least one stopper is disposed on each side of the top of the frame; each limiting part comprises a fixed plate and a limiting plate which are hinged with each other; the fixed plate is connected to the outer side of the footpath of the tank container, and the limiting plate can rotate from top to bottom to a horizontal position and is locked at the horizontal position; the limiting plate is provided with a limiting clamping groove; when the limiting plate is in a horizontal position, the opening of the limiting clamping groove faces the first vertical rail or the second vertical rail, and the first vertical rail or the second vertical rail in the standing state can be clamped and fixed to keep the first rail unit and the second rail unit in the unfolding state; when the limiting plate is turned upwards to enable the first vertical railing or the second vertical railing to be separated from the limiting clamping groove, the first vertical railing or the second vertical railing can rotate downwards, and the first railing unit and the second railing unit are folded and folded.

The invention also provides a tank container, which comprises a tank body and a frame arranged outside the tank body in an enclosing mode, wherein the handrail is arranged on two sides of the top of the frame.

According to the technical scheme, the invention has the advantages and positive effects that:

the hand rail in this embodiment includes a first rail unit and a second rail unit that are connected in tandem in the length direction of the tank container, and a link mechanism. The first railing unit and the second railing unit move oppositely to be lifted and unfolded or move oppositely to be folded and folded through the linkage mechanism, the handrail does not exceed the top frame of the tank container when being folded and folded, the protection range covered by the handrail is enlarged when the handrail is lifted and unfolded, and the safety of operation on the top of the tank container is improved. The linkage mechanism drives the first railing unit and the second railing unit to move simultaneously, the two railing units can be unfolded or folded simultaneously through one-time operation, and the operation is convenient and quick. And linkage mechanism rotates the intermeshing of wheel through first rotation wheel and second, can realize the simultaneous movement of first railing unit and second railing unit, and stable in structure assembles simply.

Drawings

FIG. 1 is a schematic structural view of one embodiment of the tank container of the present invention;

FIG. 2 is a first directional view of FIG. 1 of the present invention;

FIG. 3 is a first side view of one embodiment of the handrail of the present invention deployed upright;

FIG. 4 is a first directional view of one embodiment of the handrail of the present invention folded for stowage;

FIG. 5 is a second directional view of one embodiment of the balustrade of the present invention;

FIG. 6 is a third directional view of one embodiment of the linkage of the present invention;

FIG. 7 is a first directional view of one embodiment of the linkage of the present invention;

FIG. 8 is a schematic view of a support plate of the present invention;

fig. 9 is a schematic view of a web of the present invention.

The reference numerals are explained below: 100. a tank container; 1. a frame; 11. a top side beam; 12. a footpath; 2. a handrail; 21. a first balustrade unit; 211. a first longitudinal rail; 212. a first transverse rail; 213. a first front vertical rail; 214. a first intermediate vertical rail; 215. a first rear vertical rail; 22. a second balustrade unit; 221. a second longitudinal rail; 222. a second transverse rail; 223. a second front vertical rail; 224. a second rear vertical rail; 23. a linkage mechanism; 231. a first rotating wheel; 232. a first spindle shaft; 233. a second rotating wheel; 234. a second rotating shaft rod; 235. a support plate; 236. a connecting plate; 2371. a first limit pin; 2372. a second limit pin; 2381. a first retainer ring; 2382. a second retainer ring; 239. a joint bracket; 24. and a limiting member.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below in the specification. It is to be understood that the invention is capable of other embodiments and that various changes in form and details may be made therein without departing from the scope of the invention and the description and drawings are to be regarded as illustrative in nature and not as restrictive.

For further explanation of the principles and construction of the present invention, reference will now be made in detail to the preferred embodiments of the present invention, which are illustrated in the accompanying drawings.

The invention provides a tank container 100, which comprises a tank body, a frame 1 arranged outside the tank body in an enclosing mode and hand rails 2 arranged on two sides of the top of the frame 1.

The frame 1 includes a top side beam 11 and a walkway 12. Wherein, the frame 1 can also comprise a top beam according to the actual situation.

Referring to fig. 1 and 2, the hand rail 2 includes a linkage 23, a stopper 24, and a first rail unit 21 and a second rail unit 22 coupled to each other in a front-rear direction along the length of the tank container 100. The first railing unit 21 and the second railing unit 22 can move towards each other to fold and retract or move away from each other to lift and unfold, so that the handrail 2 does not exceed the frame 1 of the tank container 100 when folded and retracted, the protection range covered by the handrail 2 is enlarged when lifted and unfolded, and the safety of the top operation of the tank container 100 is improved. The linkage mechanism 23 drives the first railing unit 21 and the second railing unit 22 to move simultaneously, so that the two railing units can be unfolded or folded simultaneously through one-time operation, and the operation is convenient and quick.

Referring to fig. 3, 4 and 5, the first rail unit 21 includes a first longitudinal rail 211, a first transverse rail 212 and a plurality of first vertical rails arranged at intervals.

The first longitudinal rail 211 extends in the length direction of the tank container 100. Specifically, the first longitudinal rail 211 has a front end and a rear end. Wherein, the front end and the rear end are based on the length direction of the tank container 100, the direction towards the vehicle head is front, and vice versa. Unless otherwise specified, the definitions of front and rear are consistent herein.

The front end of the first longitudinal rail 211 is connected to the rear end of the second rail unit 22.

The first transverse rail 212 is disposed at the rear end of the first longitudinal rail 211, and the first transverse rail 212 extends in the transverse direction of the tank container 100. Specifically, the first transverse rail 212 and the first longitudinal rail 211 are bent and transited, that is, the first transverse rail 212 and the first longitudinal rail 211 are connected by a transition piece disposed obliquely with respect to both of them.

The length of the first transverse railings 212 is less than half of the length of the frame 1, that is, when the handrail 2 at both sides of the frame 1 are unfolded, there is a space between the two first transverse railings 212, so that the worker can conveniently go up to the top of the frame 1.

The first vertical rail located at the front end of the first longitudinal rail 211 is a first front vertical rail 213, the first vertical rail located at the rear end of the first horizontal rail is a first rear vertical rail 215, and the first middle vertical rail 214 is located between the first front vertical rail 213 and the first rear vertical rail 215. The first front vertical rail 213, the first rear vertical rail 215, and the first middle vertical rail 214 constitute a first vertical rail.

The upper end of each first vertical railing is hinged with the first horizontal railing, and the lower end of each first vertical railing is hinged with the top of the frame 1. In this embodiment, the lower end of each first vertical rail is connected to the walkway 12. In other embodiments, the connecting structure can be connected with the longitudinal beam. When each first vertical balustrade is rotated toward the second balustrade unit 22, the first balustrade unit 21 is folded and retracted.

Second railing unit 22 includes a second longitudinal railing 221, a second transverse railing 222, and a plurality of second vertical railings disposed at intervals.

The second longitudinal rail 221 extends in the length direction of the tank container 100. Specifically, the second longitudinal rail 221 has a front end and a rear end. The rear end of the second longitudinal rail 221 is connected to the front end of the first rail unit 21.

The second transverse rail 222 is disposed at a front end of the second longitudinal rail 221, and the second transverse rail 222 extends in a transverse direction of the tank container 100. Specifically, the second transverse rail 222 and the second longitudinal rail 221 are bent and transited, that is, the two are connected by a transition piece disposed obliquely with respect to both the second transverse rail 222 and the second longitudinal rail 221.

The length of the second transverse rail 222 is slightly less than half of the length of the frame 1, that is, when the handrail 2 at two sides of the frame 1 are unfolded, a space is formed between the two second transverse rails 222, so that the second transverse rails 222 can be conveniently unfolded and folded. And the space between the two second transverse rails 222 is small, so as to protect the safety of the operator on the top of the frame 1.

The second vertical rail located at the front end of the second longitudinal rail 221 is a second front vertical rail 223, and the second vertical rail located at the rear end of the second longitudinal rail 221 is a second rear vertical rail 224. The second front end vertical rail 223 and the second rear end vertical rail 224 constitute a second vertical rail. In other embodiments, a second middle vertical rail may be further disposed between the second front vertical rail 223 and the second rear vertical rail 224, which may be selected according to practical applications.

Further, each second vertical railing includes the montant upper segment and the montant hypomere that two parallel intervals set up to and the slope section of connecting montant upper segment bottom and montant hypomere top. By adopting the arrangement, the second vertical railing is folded and retracted in the frame 1, and the interference between the second vertical railing and the top cross beam is avoided. If the tank container 100 includes a top cross-beam, the second vertical rail may be a vertical rod.

The upper end of each second vertical railing is hinged with the second horizontal railing, and the lower end of each second vertical railing is hinged with the top of the frame 1. In this embodiment, the lower end of each second vertical rail is connected to the walkway 12. In other embodiments, the connecting structure can be connected with the longitudinal beam. When each second vertical balustrade is rotated toward second balustrade unit 22, second balustrade unit 22 is folded up.

Referring to fig. 6 and 7, the linkage mechanism 23 includes a first rotating wheel 231, a second rotating wheel 233, a first rotating shaft 232, a second rotating shaft 234, a connecting plate 236, a supporting plate 235, a retainer ring, a stopper pin, and a bracket assembly.

The first rotating wheel 231 has a circular shape and has first engaging teeth on the outer circumference thereof. Specifically, the central angle of the circular arc of the first meshing tooth covering the outer periphery of the first rotating wheel 231 is not less than 120 °. In the present embodiment, the first meshing teeth cover the arc of the outer periphery of the first rotating wheel 231 with a central angle of 360 °, i.e., completely cover the outer periphery of the first rotating wheel 231. In other embodiments, the actual setting may also be relied upon.

The first rotation shaft 232 extends in the width direction of the tank container 100 and is fixedly connected to the first rotation wheel 231. Specifically, a first rotating shaft sleeve is arranged in the first rotating wheel 231, and the first rotating wheel 231 and the first rotating shaft sleeve are connected through a key, so that the first rotating wheel 231 and the first rotating shaft sleeve rotate simultaneously. The portion of the first rotating shaft sleeve protruding out of the first rotating wheel 231 is provided with a mounting hole, and the axis of the mounting hole is perpendicular to the axis of the first rotating shaft sleeve. The first rotating shaft rod 232 is provided with a connecting hole, and the axis of the connecting hole is perpendicular to the axis of the first rotating shaft rod 232. The first rotating shaft sleeve is connected with the first rotating shaft rod 232 by inserting the pin shaft into the mounting hole and the connecting hole, so that the first rotating shaft rod 232 and the first shaft sleeve rotate simultaneously.

One end of the first rotating shaft rod 232 is fixedly connected with the first front vertical handrail 213 of the first handrail unit, and the other end is provided with a first limiting hole, and the axis of the first limiting hole is perpendicular to the axis of the first rotating shaft rod 232.

The second rotating wheel 233 has a circular shape and has second engaging teeth on the outer circumference thereof. Specifically, the central angle of the circular arc of the second meshing tooth covering the outer periphery of the second rotating wheel 233 is not less than 120 °. In the present embodiment, the central angle of the arc of the second meshing teeth covering the outer periphery of the second rotating wheel 233 is 360 °, i.e. completely covering the outer periphery of the second rotating wheel 233. In other embodiments, the actual setting may also be relied upon.

The second rotary wheel 233 and the first rotary wheel 231 are disposed in a vertically staggered manner. Specifically, an angle α between a horizontal plane and a line connecting the axis of the first rotating wheel 231 and the axis of the second rotating wheel 233 is 30 ° to 60 °. In this embodiment, the included angle is 45 °.

In other embodiments, the second rotating wheel 233 and the first rotating wheel 231 may be located at the same height when the frame 1 does not include a top beam.

The second engagement teeth are engaged with the first engagement teeth, so that the second rotating wheel 233 and the first rotating wheel 231 are simultaneously rotated.

The second rotating shaft 234 extends in the width direction of the tank container 100 and is fixedly connected to the second rotating wheel 233. Specifically, the connection between the second rotating shaft 234 and the second rotating wheel 233 can refer to the connection between the first rotating shaft 232 and the first rotating wheel 231, which is not described herein.

One end of the second rotating shaft rod 234 is fixedly connected with the second rear vertical rail 224 of the second handrail unit, and the other end is provided with a second limiting hole, and the axis of the second limiting hole is perpendicular to the axis of the second rotating shaft rod 234.

Since the first and second rotating wheels 231 and 233 are vertically offset, the first and second rotating shafts 232 and 234 are vertically offset.

A support plate 235 is installed at the outer side of the walkway 12. The inner side is the area defined by the two longitudinal beams facing the frame 1, whereas the outer side is the opposite. Specifically, the support plate 235 is vertically disposed and extends in a length direction of the tank container 100. Referring to fig. 8, two through holes are formed in the supporting plate 235, and the two through holes are disposed in a staggered manner. An included angle beta between a connecting line between the axes of the two through holes and the horizontal plane corresponds to the included angle alpha, namely the included angle alpha is the same as the included angle beta. In this embodiment, the included angle β is 45 °.

The connection plate 236 is installed at the bottom of the walkway 12, and the connection plate 236 and the support plate 235 are spaced apart in parallel in the width direction of the tank container 100. Specifically, the connection plate 236 is vertically disposed and extends in a length direction of the tank container 100. Referring to fig. 9, the connecting plate 236 has two openings, and the two openings are disposed in a staggered manner. The included angle gamma between the connecting line between the axes of the two openings and the horizontal plane corresponds to the included angle beta, namely the included angle gamma is the same as the included angle beta. In this embodiment, the included angle γ is 45 °.

The first shaft rod 232 is disposed through the opening and the via hole on the same horizontal plane, so that the first shaft rod 232 is mounted on the frame 1. Specifically, the first pivot shaft 232 is located below the walkway 12 and extends in the width direction of the tank container 100 and protrudes outside the walkway 12. The second rotating shaft 234 is inserted into the opening and the through hole located on the same horizontal plane, so that the second rotating shaft 234 is installed on the frame 1. Specifically, the second pivot shaft 234 is located below the walkway 12 and extends in the width direction of the tank container 100 and protrudes outside the walkway 12.

The stopper pin includes a first stopper pin 2371 and a second stopper pin 2372. The first limit pin 2371 is disposed corresponding to the first rotating shaft 232. The first stopper pin 2371 is located between the support plate 235 and the fixing and is close to the support plate 235, the first stopper pin 2371 is inserted into the first stopper hole of the first pivot rod 232, the support plate 235 restricts the movement of the first stopper pin 2371 in the width direction of the tank container 100, and restricts the movement of the first pivot rod 232, thereby displaying the movement of the first handle unit in the width direction of the tank container 100.

Specifically, in this embodiment, the first limit pin 2371 is a cotter pin.

Further, the first retainer 2381 is disposed between the supporting plate 235 and the first stopper 2371. The first retaining ring 2381 is rotatably disposed on the first rotating shaft 232, and the first retaining ring 2381 is rotatable relative to the supporting plate 235. The first retainer ring 2381 is arranged so that the contact between the first stopper pin 2371 and the support plate 235 is changed to the surface contact between the first retainer ring 2381 and the support plate 235, thereby preventing the first stopper pin 2371 from rubbing the support plate 235 when the first rotating shaft rod 232 rotates. And the first retaining ring 2381 is rotatable relative to the support plate 235, further reducing friction between the first retaining ring 2381 and the support plate 235.

The second limit pin 2372 has the same structure, the same arrangement, and the same limit principle as the first limit pin 2371, and reference may be made to the description of the first limit pin 2371, which is not repeated herein.

The second stop 2382 is disposed between the supporting plate 235 and the second limit pin 2372. The second stop ring 2382 is rotatably sleeved on the second rotating shaft 234, and the second stop ring 2382 is rotatable relative to the supporting plate 235. The second retaining ring 2382 has the same function as the first retaining ring 2381, and reference may be made to the description of the first retaining ring 2381, which is not repeated herein.

The bracket assembly includes a first bracket, a uniting bracket 239, and a second bracket, which are sequentially disposed along the length direction of the tank container 100.

The joint bracket 239 is disposed corresponding to the linkage structure. Specifically, a joint bracket 239 is provided corresponding to the first rotating wheel 231 and the second rotating wheel 233, is coupled to the walkway 12, and is positioned outside the walkway 12.

The combined bracket 239 is provided with a first positioning groove and a second positioning groove which are respectively positioned at two opposite ends of the combined bracket 239. Specifically, the first positioning groove is located at the front end of the joint bracket 239, and its opening is toward the front end. The second positioning groove is located at the rear end of the joint bracket 239 and opens toward the rear end.

When the handrail 2 is in the erect and expanded state, the first front vertical handrail 213 is located in the first positioning groove, and the second rear vertical handrail 224 is located in the second positioning groove, i.e., the joint bracket 239 is limited when the handrail 2 is erect and expanded. The joint bracket 239 supports the first and second longitudinal rails 211 and 221 when the handrail 2 is folded.

In this embodiment, the joint bracket 239 includes a horizontally disposed support plate and a vertically disposed baffle, and the baffle is located outside the support plate. The first positioning groove and the second positioning groove are arranged on the supporting plate.

The first bracket is disposed in correspondence with the first intermediate vertical rail 214. The first bracket is provided with a first clamping groove with an opening facing to the front end. When the handrail 2 is erected, the second vertical handrail is positioned in the first clamping groove.

The second bracket is disposed corresponding to the second front vertical rail 223. The second bracket is provided with a second clamping groove with an opening facing to the front end. When the handrail 2 is erected, the second front vertical handrail 223 is located in the second clamping groove.

The limiting member 24 includes a fixed plate and a limiting plate hinged to each other, the fixed plate is connected to the outer side of the walkway 12, and the limiting plate is hinged to the upper side of the fixed plate so that the limiting plate can rotate from top to bottom to a horizontal position and is locked and fixed at the horizontal position.

In this embodiment, the number of the limiting members 24 is two, and the two limiting members are respectively located at two sides of the frame 1, and the limiting members 24 are located at the rear end, that is, the limiting members 24 are arranged corresponding to the first rear-end vertical rails 215, so that the operating personnel can conveniently erect the handrail 2 to unfold and stabilize the vertical rails through the limiting members 24 when the operating personnel goes up to the top of the tank body from the rear end of the tank container 100, thereby ensuring the safety of the operating personnel at the top of the tank body. In other embodiments, the number of the limiting members 24 may be three, four or other numbers, and the limiting members are arranged at intervals along the longitudinal direction.

The fixing plate extends vertically, clings to the side surface of the footpath 12 and is connected and fixed with the footpath 12. The fixed plate is detachably connected with the footpath 12 through a fastener.

The top of fixed plate is equipped with first axle sleeve, and the axis of first axle sleeve extends along longitudinal extension. In this embodiment, a plurality of first shaft sleeves are longitudinally arranged at intervals at the top end of the fixing plate.

One side of the limiting plate is provided with a second shaft sleeve, and the other side of the limiting plate is provided with a limiting clamping groove. In this embodiment, a plurality of second shaft sleeves are arranged along the length direction interval of limiting plate.

The limiting plate is further provided with a threaded connecting hole, and the axis of the threaded connecting hole extends along the direction from the second shaft sleeve to the limiting clamping groove.

When the limiting plate is connected with the fixed plate, the axis of the second shaft sleeve extends longitudinally, the first shaft sleeve and the second shaft sleeve are placed in a staggered mode, the rotating shaft is inserted into the first shaft sleeve and the second shaft sleeve, the limiting plate is rotatably connected with the fixed plate, and then the limiting plate is rotatably connected with the footpath 12.

Specifically, the rotating shaft is provided with a threaded mounting hole, and the axis of the threaded mounting hole is perpendicular to the axis of the rotating shaft and corresponds to the threaded connecting hole in the limiting plate. Threaded mounting hole and the threaded connection hole on the limiting plate are worn to establish by the fastener, and are connected pivot and limiting plate fixed, open excessively when not only can avoiding the limiting plate upset, can also prevent not hard up of pivot.

The limiting clamping groove is provided with an opening deviating from the direction of the second shaft sleeve, and the opening enables the first rear vertical rail 215 to enter or exit the limiting clamping groove. Specifically, when the restriction plate is in the horizontal position, the opening faces the vertical rod.

When the limiting plate is in the horizontal position, the bottom surface of the limiting plate abuts against the fixing plate, so that the limiting plate is locked in the horizontal position. At this time, the opening of the limiting clamping groove faces the first rear-end vertical rail 215, and the first rear-end vertical rail 215 in the standing state can be clamped and fixed to keep the unfolding state of the handrail 2.

When the limiting plate upwards overturns to make the vertical railing 215 of the first rear end break away from the limiting clamping groove, the vertical railing 215 of the first rear end can rotate downwards, and the handrail 2 is retracted.

When the limiting plate is turned upwards from the horizontal position to the vertical position, the footpath 12 is abutted against the limiting plate to limit the limiting plate to continue rotating.

The hand rail 2 of the invention is in the situation shown in fig. 1 and fig. 2 when an operator works, at this time, the hand rail 2 is in an upright and unfolded state, the limiting plate is in a horizontal position, that is, the first vertical rail and the second vertical rail are both in an upright state, and the first longitudinal rail 211 and the second longitudinal rail 221 cover the length of the frame 1, so that the protection range covered by the hand rail 2 is increased in a limited space, and the safety of the top operation of the tank container 100 is improved. And the first transverse rail 212 and the second transverse rail 222 of the handrail 2 cover part of the width of the frame 1, so that the handrail 2 is arranged around the frame 1, and the safety of top operation is further ensured.

Referring to fig. 3 and 4 again, when the handrail 2 needs to be retracted, the limiting plate is turned to the vertical position, and then each first vertical handrail is pushed towards the second handrail unit 22, at this time, the first front-end vertical handrail 213 drives the first rotating wheel 231 to rotate; then, the first rotating wheel 231 drives the second rotating wheel 233 to rotate, and drives the second rotating shaft 234 to rotate, and further drives the second rear vertical rail 224 to rotate towards the first rail unit 21, and the second rear vertical rail 224 rotates and the second longitudinal rail 221 folds downwards to be folded; and finally, when the first vertical railing and the second vertical railing are both folded on the frame 1, the folding of the handrail 2 is completed. When the folding frame is folded, the first front vertical rail 213 and the second rear vertical rail 224 move back to back, and the first longitudinal rail 211 and the second longitudinal rail 221 move in opposite directions, so that the first longitudinal rail 211 and the second longitudinal rail 221 do not exceed the frame 1 after folding.

The opening operation of the handrail 2 of the present invention is basically opposite to the folding operation, and first, each first vertical handrail is rotated toward the opposite direction of the second handrail unit 22, at this time, the first front vertical handrail 213 drives the first rotating shaft 232 to rotate, and the first rotating shaft 232 drives the first rotating wheel 231 to rotate; then, the first rotating wheel 231 drives the second rotating wheel 233 to rotate, and drives the second rotating shaft 234 to rotate, and further drives the second rear vertical rail 224 to rotate in the direction opposite to the first rail unit 21, and the second rear vertical rail 224 rotates and rises while the second longitudinal rail 221 rises and expands upwards; finally, all erects on frame 1 as first vertical railing and the vertical railing of second to overturn the limiting plate to the horizontality, make first vertical railing 215 of rear end card arrange the spacing draw-in groove of limiting plate in, accomplish the expansion of handrail 2. When the handrail 2 is unfolded, the first front vertical handrail 213 and the second rear vertical handrail 224 move in opposite directions, and the first longitudinal handrail 211 and the second longitudinal handrail 221 move in opposite directions.

The hand rail in this embodiment passes through link gear with first railing unit and second railing unit simultaneously back to back the body motion lift expand or move folding packing up in opposite directions, and does not surpass tank container's top frame when hand rail folds packing up, has increased the protection scope that hand rail covered when rising expands, has improved the security of tank container top operation. The linkage mechanism drives the first railing unit and the second railing unit to move simultaneously, the two railing units can be unfolded or folded simultaneously through one-time operation, and the operation is convenient and quick. And linkage mechanism rotates the intermeshing of wheel through first rotation wheel and second, can realize the simultaneous movement of first railing unit and second railing unit, and stable in structure assembles simply.

Further, first railing unit includes first horizontal railing, first vertical railing and first vertical railing, and second railing unit includes horizontal railing of second, the vertical railing of second and the vertical railing of second for first railing unit and second railing unit all are equipped with the railing all around the frame when erectting to expand, have further improved the security of tank container top operation.

While the present invention has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.