Tank container and its handrail

Abstract

The present invention provides a tank container and its handrail. The handrail includes a first railing unit and a second railing unit that are connected end to end in the front and back along the length direction of the tank container, as well as a linkage mechanism. The first railing unit and the second railing unit can move away from each other simultaneously and stand upright on the top of the frame, or move towards each other simultaneously and fold up. The linkage mechanism includes a first rotating wheel and a second rotating wheel. The first rotating wheel is fixedly connected to the first railing unit; the outer periphery of the first rotating wheel has first engaging teeth; the second rotating wheel is fixedly connected to the second railing unit; the outer periphery of the second rotating wheel has second engaging teeth, and the second engaging teeth are engaged with the first engaging teeth, so that the first railing unit and the second railing unit move simultaneously. Through the mutual engagement of the first rotating wheel and the second rotating wheel, the linkage mechanism can achieve the simultaneous movement of the first railing unit and the second railing unit, with a stable structure and simple assembly.

Description

Technical Field

[0001] The present invention relates to a container and its accessories, and particularly to a tank container and a handrail structure thereon. Background Art

[0002] In order to minimize the risk of operators working on the top of a tank container, most current tank containers are equipped with folding handrails on one or both sides of their tops. When in use, the handrails are opened and erected to a certain height to prevent operators from falling off the top of the tank container and ensure work safety. When not in use, the handrails are folded on the top of the tank container to facilitate transportation.

[0003] Currently, the commonly used handrails of tank containers mostly unfold from the front end to the rear end to provide sufficient protection for the rear end and the middle area where there is more personnel activity. However, due to the folding space limitation of the handrails, the length of the handrails is difficult to fully cover the front end area, and the safety performance in this area is relatively weak. In some occasions where there is also a large amount of personnel activity at the front end, and when customers emphasize the safety of top operations, it is difficult to fully meet their diverse configuration requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide a handrail that can cover the front end area of a tank container and a tank container using the handrail, so as to solve the problem that the handrail in the prior art cannot cover the front end area.

[0005] To solve the above technical problems, the present invention provides a handrail for a tank container, which is arranged on both sides of the top of the frame of the tank container, and includes a first railing unit and a second railing unit that are connected end to end in the length direction of the tank container, and a linkage mechanism; the first railing unit and the second railing unit can move away from each other simultaneously to stand upright on the top of the frame, or move towards each other simultaneously to be folded and retracted; the linkage mechanism includes: a first rotating wheel fixedly connected to the first railing unit; the outer periphery of the first rotating wheel has a first meshing tooth; a second rotating wheel fixedly connected to the second railing unit; the outer periphery of the second rotating wheel has a second meshing tooth, and the second meshing tooth meshes with the first meshing tooth, so that the first railing unit and the second railing unit move simultaneously.

[0006] In one embodiment, the first rotating wheel and the second rotating wheel are arranged with an offset in the vertical direction.

[0007] In one embodiment, the angle between the line connecting the centers of the first rotating wheel and the second rotating wheel and the horizontal plane is 30° - 60°.

[0008] In one embodiment, the central angle of the arc of the first engaging teeth covering the outer periphery of the first rotating wheel is not less than 120°; the central angle of the arc of the second engaging teeth covering the outer periphery of the second rotating wheel is not less than 120°.

[0009] In one embodiment, the first rotating wheel is fixedly connected to the first railing unit through a first rotating shaft rod, and the first rotating shaft rod extends along the width direction of the tank container; the second rotating wheel is fixedly connected to the second railing unit through a second rotating shaft rod, and the second rotating shaft rod extends along the width direction of the tank container.

[0010] In one embodiment, the first rotating shaft rod and the second rotating shaft rod are installed on the frame through a connecting plate and a supporting plate, and the connecting plate and the supporting plate are arranged in parallel at intervals along the width direction of the tank container; the connecting plate is located on the side of the walkway of the tank container, and through holes for the first rotating shaft rod and the second rotating shaft rod to pass through are respectively formed in the connecting plate; the supporting plate is located below the frame and is fixedly connected to the frame, and through holes for the first rotating shaft rod and the second rotating shaft rod to pass through are respectively formed in the supporting plate.

[0011] In one embodiment, a first limit pin and a second limit pin are arranged on one side of the supporting plate, and both the first limit pin and the second limit pin are located between the supporting plate and the connecting plate and are close to the supporting plate; a first limit hole is formed in the first rotating shaft rod, the axis of the first limit hole is perpendicular to the axis of the first rotating shaft rod, and the first limit pin is inserted into the first limit hole; a second limit hole is formed in the second rotating shaft rod, the axis of the second limit hole is perpendicular to the axis of the second rotating shaft rod, and the second limit pin is inserted into the second limit hole.

[0012] In one embodiment, a first retaining ring is further arranged between the supporting plate and the first limit pin, the first retaining ring is rotatably sleeved on the first rotating shaft rod, and the first retaining ring is rotatable relative to the supporting plate; a second retaining ring is further arranged between the supporting plate and the second limit pin, the second retaining ring is rotatably sleeved on the second rotating shaft rod, and the second retaining ring is rotatable relative to the supporting plate.

[0013] In one embodiment, the first railing unit includes a first longitudinal railing, a first transverse railing, and a plurality of first vertical railings arranged at intervals; the first longitudinal railing extends along the length direction of the tank container, the first transverse railing extends along the width direction of the tank container, and is connected to one end of the first longitudinal railing away from the second railing unit; the upper ends of the first vertical railings are hinged to the first longitudinal railing, the lower ends of the first vertical railings are hinged to the top of the frame, and one of the first vertical railings is fixedly connected to the first rotating wheel; when each first vertical railing rotates towards the second railing unit, the first railing unit folds up and retracts; the second railing unit includes a second longitudinal railing, a second transverse railing, and a plurality of second vertical railings arranged at intervals; the second longitudinal railing extends along the length direction of the tank container, the second transverse railing extends along the width direction of the tank container, and is connected to one end of the second longitudinal railing away from the first railing unit; the upper ends of the second vertical railings are hinged to the second longitudinal railing, the lower ends of the second vertical railings are hinged to the top of the frame, and one of the second vertical railings is fixedly connected to the second rotating wheel; when each second vertical railing rotates towards the first railing unit, the second railing unit folds up and retracts.

[0014] In one embodiment, the second vertical railing includes two parallel and spaced-apart upper vertical rods and lower vertical rods, and an inclined section connecting the bottom of the upper vertical rod and the top of the lower vertical rod.

[0015] In one embodiment, the handrail also includes a combined bracket corresponding to the linkage mechanism; 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 located at opposite ends of the combined bracket.

[0016] In one embodiment, the handrail also includes a first bracket and a second bracket respectively located at both ends of the combined bracket along the length direction of the tank container; the first bracket corresponds to the first vertical railing and has a first clamping groove with an opening facing the first vertical railing; the second bracket corresponds to the second vertical railing and has a second clamping groove with an opening facing the second vertical railing.

[0017] In one embodiment, the handrail further includes a limiting member, and at least one limiting member is provided on each side of the top of the frame; each limiting member includes a fixed plate and a limiting plate hinged to each other; the fixed plate is connected to the outer side of the walkway of the tank container, and the limiting plate can rotate downward to a horizontal position and be locked in the horizontal position; the limiting plate has a limiting card slot; when the limiting plate is in the horizontal position, the opening of the limiting card slot faces the first vertical railing or the second vertical railing, and can clamp and fix the first vertical railing or the second vertical railing in the erected state to maintain the unfolded state of the first railing unit and the second railing unit; when the limiting plate is turned upward to disengage the first vertical railing or the second vertical railing from the limiting card slot, the first vertical railing or the second vertical railing can rotate downward, so that the first railing unit and the second railing unit are folded and retracted.

[0018] The present invention also provides a tank container, including a tank body and a frame surrounding the outside of the tank body, and the handrails as described above are further provided on both sides of the top of the frame.

[0019] As can be seen from the above technical solutions, the advantages and positive effects of the present invention are as follows:

[0020] The handrail in this embodiment includes a first railing unit and a second railing unit connected end to end in the length direction of the tank container, and a linkage mechanism. The first railing unit and the second railing unit are simultaneously moved away from each other to be raised and unfolded or moved towards each other to be folded and retracted through the linkage mechanism. When the handrail is folded and retracted, it does not exceed the top frame of the tank container. When it is raised and unfolded, the protection range covered by the handrail is increased, and the safety of the top operation of the tank container is improved. The linkage mechanism drives the first railing unit and the second railing unit to move simultaneously, and the simultaneous unfolding or folding of the two railing units can be achieved with one operation, which is convenient and fast. And the linkage mechanism can achieve the simultaneous movement of the first railing unit and the second railing unit through the meshing of the first rotating wheel and the second rotating wheel, with stable structure and simple assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural view of one embodiment of the tank container of the present invention;

[0022] Figure 2 is the present invention Figure 1 in the first direction view;

[0023] Figure 3 is the first direction view of the handrail of the present invention in one embodiment when erected and unfolded;

[0024] Figure 4It is the first direction view of the folding and retracting of one embodiment of the handrail of the present invention;

[0025] Figure 5 It is the second direction view of one embodiment of the handrail of the present invention;

[0026] Figure 6 It is the third direction view of one embodiment of the linkage mechanism of the present invention;

[0027] Figure 7 It is the first direction view of one embodiment of the linkage mechanism of the present invention;

[0028] Figure 8 It is the schematic diagram of the support plate of the present invention;

[0029] Figure 9 It is the schematic diagram of the connecting plate of the present invention.

[0030] Explanation of reference numerals: 100, tank container; 1, frame; 11, top side beam; 12, walkway; 2, handrail; 21, first railing unit; 211, first longitudinal railing; 212, first transverse railing; 213, first front vertical railing; 214, first middle vertical railing; 215, first rear vertical railing; 22, second railing unit; 221, second longitudinal railing; 222, second transverse railing; 223, second front vertical railing; 224, second rear vertical railing; 23, linkage mechanism; 231, first rotating wheel; 232, first rotating shaft rod; 233, second rotating wheel; 234, second rotating shaft rod; 235, support plate; 236, connecting plate; 2371, first limit pin; 2372, second limit pin; 2381, first retaining ring; 2382, second retaining ring; 239, combined bracket; 24, limiting member. Detailed Description of the Invention

[0031] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different embodiments, all of which do not depart from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes and not for limiting the present invention.

[0032] To further illustrate the principle and structure of the present invention, the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0033] The present invention provides a tank container 100, including a tank body, a frame 1 surrounding the outside of the tank body, and handrails 2 provided on both sides of the top of the frame 1.

[0034] The frame 1 includes a top side beam 11 and a walkway 12. Among them, the frame 1 may also include a top cross beam according to actual situations.

[0035] Refer to Figure 1 and Figure 2 The handrail 2 includes a linkage mechanism 23, a limiting member 24, and a first railing unit 21 and a second railing unit 22 that are connected end to end in the longitudinal direction of the tank container 100. The first railing unit 21 and the second railing unit 22 can move towards each other to fold up or move away from each other to rise and unfold. Therefore, when the handrail 2 is folded up, it does not exceed the frame 1 of the tank container 100, and when it rises and unfolds, the protection range covered by the handrail 2 is increased, improving the safety of the top operation of the tank container 100. The linkage mechanism 23 drives the first railing unit 21 and the second railing unit 22 to move simultaneously, and the simultaneous unfolding or folding of the two railing units can be achieved with one operation, which is convenient and fast.

[0036] Refer to Figure 3 、 Figure 4 and Figure 5 The first railing unit 21 includes a first longitudinal railing 211, a first transverse railing 212, and a plurality of first vertical railings arranged at intervals.

[0037] The first longitudinal railing 211 extends along the longitudinal direction of the tank container 100. Specifically, the first longitudinal railing 211 has a front end and a rear end. Among them, the front end and the rear end are referenced with the longitudinal direction of the tank container 100. The direction towards the head of the vehicle is the front, and the opposite is the rear. Unless otherwise specified below, the definitions of front and rear are consistent with this.

[0038] The front end of the first longitudinal railing 211 is connected to the rear end of the second railing unit 22.

[0039] The first transverse railing 212 is arranged at the rear end of the first longitudinal railing 211, and the first transverse railing 212 extends along the transverse direction of the tank container 100. Specifically, there is a bent transition between the first transverse railing 212 and the first longitudinal railing 211, that is, the two are connected through a transition member that is inclined with respect to both the first transverse railing 212 and the first longitudinal railing 211.

[0040] The length of the first transverse railing 212 is less than half of the length of the frame 1. That is, when the handrails 2 on both sides of the frame 1 are unfolded, there is an interval between the two first transverse railings 212 to facilitate the staff to reach the top of the frame 1.

[0041] The first vertical railing at the front end of the first longitudinal railing 211 is the first front vertical railing 213, the first vertical railing at the rear end of the first horizontal railing is the first rear vertical railing 215, and the first intermediate vertical railing 214 is located between the first front vertical railing 213 and the first rear vertical railing 215. The first front vertical railing 213, the first rear vertical railing 215, and the first intermediate vertical railing 214 constitute the first vertical railing.

[0042] The upper ends of the first vertical rails are hinged to the first horizontal rail, and the lower ends of the first vertical rails are hinged to the top of the frame 1. In this embodiment, the lower ends of the first vertical rails are connected to the walkway 12. In other embodiments, they can also be connected to the longitudinal beams. When the first vertical rails rotate towards the second rail unit 22, the first rail unit 21 folds up and retracts.

[0043] The second rail unit 22 includes second longitudinal rails 221, second transverse rails 222, and a plurality of second vertical rails arranged at intervals.

[0044] The second longitudinal rails 221 extend along the length direction of the tank container 100. Specifically, the second longitudinal rails 221 have a front end and a rear end. The rear end of the second longitudinal rails 221 is joined to the front end of the first rail unit 21.

[0045] The second transverse rails 222 are arranged at the front end of the second longitudinal rails 221, and the second transverse rails 222 extend along the transverse direction of the tank container 100. Specifically, there is a bent transition between the second transverse rails 222 and the second longitudinal rails 221, that is, the two are connected by a transition piece that is inclined with respect to both the second transverse rails 222 and the second longitudinal rails 221.

[0046] The length of the second transverse rails 222 is slightly less than half of the length of the frame 1. That is, when the handrails 2 on both sides of the frame 1 are fully extended, there is a gap between the two second transverse rails 222, which facilitates the unfolding and folding of the second transverse rails 222. And the gap between the two second transverse rails 222 is relatively small, protecting the safety of the operators located on the top of the frame 1.

[0047] The second vertical rail at the front end of the second longitudinal rails 221 is the second front vertical rail 223, and the second vertical rail at the rear end of the second longitudinal rails 221 is the second rear vertical rail 224. The second front vertical rail 223 and the second rear vertical rail 224 constitute the second vertical rails. In other embodiments, a second middle vertical rail can also be provided between the second front vertical rail 223 and the second rear vertical rail 224, which can be selected according to actual applications.

[0048] Furthermore, each second vertical rail includes two parallel and spaced-apart upper vertical rods and lower vertical rods, and an inclined section connecting the bottom of the upper vertical rod and the top of the lower vertical rod. With this arrangement, when the second vertical rails are folded up and retracted in the frame 1, interference between the second vertical rails and the top cross beam is avoided. If the tank container 100 does not include a top cross beam, the second vertical rails can be a straight rod.

[0049] The upper ends of the second vertical rails are hinged to the second horizontal rail, and the lower ends of the second vertical rails are hinged to the top of the frame 1. In this embodiment, the lower ends of the second vertical rails are connected to the walkway 12. In other embodiments, they can also be connected to the longitudinal beams. When the second vertical rails rotate towards the second rail unit 22, the second rail unit 22 folds up and retracts.

[0050] Refer to Figure 6 and Figure 7 , the linkage mechanism 23 includes a first rotating wheel 231, a second rotating wheel 233, a first rotating shaft rod 232, a second rotating shaft rod 234, a connecting plate 236, a support plate 235, a retaining ring, a limit pin and a bracket assembly.

[0051] The first rotating wheel 231 is circular, and its outer periphery has first engaging teeth. Specifically, the central angle of the arc on the outer periphery of the first rotating wheel 231 covered by the first engaging teeth is not less than 120°. In this embodiment, the central angle of the arc on the outer periphery of the first rotating wheel 231 covered by the first engaging teeth is 360°, that is, it completely covers the outer periphery of the first rotating wheel 231. In other embodiments, it can also be set according to the actual situation.

[0052] The first rotating shaft rod 232 extends along the width direction of the tank container 100 and is fixedly connected to the first rotating wheel 231. Specifically, a first rotating shaft sleeve is provided inside the first rotating wheel 231, and the two are connected by a key, so that the first rotating wheel 231 and the first rotating shaft sleeve rotate simultaneously. An installation hole is opened on the part of the first rotating shaft sleeve protruding from the first rotating wheel 231, and the axis of the installation hole is perpendicular to the axis of the first rotating shaft sleeve. A connection hole is opened on the first rotating shaft rod 232, and the axis of the connection hole is perpendicular to the axis of the first rotating shaft rod 232. The connection between the first rotating shaft sleeve and the first rotating shaft rod 232 is realized by inserting a pin shaft into the installation hole and the connection hole, and the first rotating shaft rod 232 and the first shaft sleeve rotate simultaneously.

[0053] One end of the first rotating shaft rod 232 is fixedly connected to the first front vertical rail 213 of the first handrail unit, and a first limit hole is opened at the other end, and the axis of the first limit hole is perpendicular to the axis of the first rotating shaft rod 232.

[0054] The second rotating wheel 233 is circular, and its outer periphery has second engaging teeth. Specifically, the central angle of the arc on the outer periphery of the second rotating wheel 233 covered by the second engaging teeth is not less than 120°. In this embodiment, the central angle of the arc on the outer periphery of the second rotating wheel 233 covered by the second engaging teeth is 360°, that is, it completely covers the outer periphery of the second rotating wheel 233. In other embodiments, it can also be set according to the actual situation.

[0055] The second rotating wheel 233 is vertically offset from the first rotating wheel 231. Specifically, the angle α between the connecting line between the axis of the first rotating wheel 231 and the axis of the second rotating wheel 233 and the horizontal plane is 30° to 60°. In this embodiment, the angle is 45°.

[0056] In other embodiments, when the frame 1 does not include the top cross beam, the second rotating wheel 233 and the first rotating wheel 231 can be at the same height.

[0057] The second engaging teeth engage with the first engaging teeth, so that the second rotating wheel 233 and the first rotating wheel 231 rotate simultaneously.

[0058] The second rotating shaft rod 234 extends along the width direction of the tank container 100 and is fixedly connected to the second rotating wheel 233. Specifically, the connection manner between the second rotating shaft rod 234 and the second rotating wheel 233 can refer to the connection between the first rotating shaft rod 232 and the first rotating wheel 231, which will not be elaborated here one by one.

[0059] One end of the second rotating shaft rod 234 is fixedly connected to the second rear vertical railing 224 of the second handrail unit, and a second limiting hole is formed at the other end, and the axis of the second limiting hole is perpendicular to the axis of the second rotating shaft rod 234.

[0060] The first rotating wheel 231 and the second rotating wheel 233 are vertically offset, so the first rotating shaft rod 232 and the second rotating shaft rod 234 are vertically offset.

[0061] The support plate 235 is installed on the outside of the walkway 12. Herein, the inner side refers to the area defined by the two longitudinal beams facing the frame 1, and the opposite is the outside. Specifically, the support plate 235 is vertically arranged and extends along the length direction of the tank container 100. Refer to Figure 8 , two through holes are formed on the support plate 235, and the two through holes are vertically offset. The angle β between the connecting line between the axes of the two through holes and the horizontal plane corresponds to the angle α, that is, the angle α is the same as the angle β. In this embodiment, the angle β is 45°.

[0062] The connecting plate 236 is installed at the bottom of the walkway 12, and the connecting plate 236 and the support plate 235 are arranged in parallel at intervals along the width direction of the tank container 100. Specifically, the connecting plate 236 is vertically arranged and extends along the length direction of the tank container 100. Refer to Figure 9 , two openings are formed on the connecting plate 236, and the two openings are vertically offset. The angle γ between the connecting line between the axes of the two openings and the horizontal plane corresponds to the angle β, that is, the angle γ is the same as the angle β. In this embodiment, the angle γ is 45°.

[0063] The first rotating shaft rod 232 passes through the opening and the through hole located on the same horizontal plane, so that the first rotating shaft rod 232 is installed on the frame 1. Specifically, the first rotating shaft rod 232 is located below the walkway 12 and extends along the width direction of the tank container 100 and extends out of the outer side of the walkway 12. The second rotating shaft rod 234 passes through the opening and the through hole located on the same horizontal plane, so that the second rotating shaft rod 234 is installed on the frame 1. Specifically, the second rotating shaft rod 234 is located below the walkway 12 and extends along the width direction of the tank container 100 and extends out of the outer side of the walkway 12.

[0064] The limit pin includes a first limit pin 2371 and a second limit pin 2372. Among them, the first limit pin 2371 is arranged corresponding to the first rotating shaft rod 232. The first limit pin 2371 is located between the support plate 235 and the fixation and is close to the support plate 235. The first limit pin 2371 is inserted into the first limit hole of the first rotating shaft rod 232. The movement of the first limit pin 2371 along the width direction of the tank container 100 is restricted by the support plate 235, and the movement of the first rotating shaft rod 232 is restricted, thereby restricting the movement of the first handrail unit along the width direction of the tank container 100.

[0065] Specifically in this embodiment, the first limit pin 2371 is a split pin.

[0066] Furthermore, a first retaining ring 2381 is arranged between the support plate 235 and the first limit pin 2371. The first retaining ring 2381 is rotatably sleeved on the first rotating shaft rod 232, and the first retaining ring 2381 is rotatable relative to the support plate 235. The arrangement of the first retaining ring 2381 changes the contact between the first limit pin 2371 and the support plate 235 to the surface contact between the first retaining ring 2381 and the support plate 235, avoiding the friction between the first limit pin 2371 and 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 the friction between the first retaining ring 2381 and the support plate 235.

[0067] The second limit pin 2372 has the same structure, the same setting method, and the same limiting principle as the first limit pin 2371. The description of the first limit pin 2371 can be referred to, and details will not be repeated here.

[0068] A second retaining ring 2382 is arranged between the support plate 235 and the second limit pin 2372. The second retaining ring 2382 is rotatably sleeved on the second rotating shaft rod 234, and the second retaining ring 2382 is rotatable relative to the support plate 235. The function of the second retaining ring 2382 is the same as that of the first retaining ring 2381. The description of the first retaining ring 2381 can be referred to, and details will not be repeated here.

[0069] The bracket assembly includes a first bracket, a combined bracket 239, and a second bracket that are sequentially arranged along the length direction of the tank container 100.

[0070] The combined bracket 239 is arranged corresponding to the linkage structure. Specifically, the combined bracket 239 is arranged corresponding to the first rotating wheel 231 and the second rotating wheel 233, is connected to the walkway 12, and is located outside the walkway 12.

[0071] The combined bracket 239 is provided with a first positioning groove and a second positioning groove respectively located at opposite ends of the combined bracket 239. Specifically, the first positioning groove is located at the front end of the combined bracket 239, and its opening faces the front end. The second positioning groove is located at the rear end of the combined bracket 239, and its opening faces the rear end.

[0072] When the handrail 2 is in the erected and unfolded state, the first front vertical railing 213 is located in the first positioning groove, and the second rear vertical railing 224 is located in the second positioning groove, that is, the combined bracket 239 limits the position when the handrail 2 is erected and unfolded. When the handrail 2 is folded, the combined bracket 239 supports the first longitudinal railing 211 and the second longitudinal railing 221.

[0073] In this embodiment, the combined bracket 239 includes a horizontally arranged support plate and a vertically arranged baffle plate, and the baffle plate is located outside the support plate. The first positioning groove and the second positioning groove are arranged on the support plate.

[0074] The first bracket is arranged corresponding to the first middle vertical railing 214. The first bracket is provided with a first card slot with an opening facing the front end. When the handrail 2 is erected, the second vertical railing is located in the first card slot.

[0075] The second bracket is arranged corresponding to the second front vertical railing 223. The second bracket is provided with a second card slot with an opening facing the front end. When the handrail 2 is erected, the second front vertical railing 223 is located in the second card slot.

[0076] The limiting member 24 includes a fixing plate and a limiting plate that are hinged to each other. The fixing plate is connected to the outside of the walkway 12, and the limiting plate is hinged to the upper side edge of the fixing plate so that the limiting plate can rotate from top to bottom to the horizontal position and be locked and fixed in the horizontal position.

[0077] In this embodiment, the number of the limiting members 24 is two, which are respectively located on both 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 vertical railing 215, which is convenient for the operator to erect and unfold the handrail 2 in time and stabilize the vertical railing through the limiting members 24 when getting onto the top of the tank body from the rear end of the tank container 100, thereby ensuring the safety of the operator on the top of the tank body. In other embodiments, the number of the limiting members 24 can also be three, four or other numbers, and they are arranged at intervals longitudinally.

[0078] The fixed plate extends vertically, closely adheres to the side surface of the footpath 12 and is fixedly connected to the footpath 12. The fixed plate and the footpath 12 are detachably connected by fasteners.

[0079] A first bushing is provided at the top end of the fixed plate, and the axis of the first bushing extends longitudinally. In this embodiment, a plurality of first bushings are arranged at intervals along the longitudinal direction at the top end of the fixed plate.

[0080] One side of the limiting plate has a second bushing, and the other side is provided with a limiting card slot. In this embodiment, a plurality of second bushings are arranged at intervals along the length direction of the limiting plate.

[0081] The limiting plate is also provided with a threaded connection hole, and the axis of the threaded connection hole extends along the direction from the second bushing to the limiting card slot.

[0082] When the limiting plate is connected to the fixed plate, the axis of the second bushing is extended longitudinally, the first bushing and the second bushing are placed staggeredly, and the rotating shaft is inserted into the first bushing and the second bushing to realize the rotatable connection between the limiting plate and the fixed plate, and further realize the rotatable connection of the limiting plate relative to the footpath 12.

[0083] Specifically, a threaded mounting hole is formed on the rotating shaft, and the axis of the threaded mounting hole is perpendicular to the axis of the rotating shaft and is correspondingly arranged with the threaded connection hole on the limiting plate. The fastener passes through the threaded mounting hole and the threaded connection hole on the limiting plate to fixedly connect the rotating shaft and the limiting plate, which can not only prevent the limiting plate from opening too much when flipping, but also prevent the loosening of the rotating shaft.

[0084] The limiting card slot has an opening facing away from the second bushing, and this opening enables the first rear vertical railing 215 to enter or exit the limiting card slot. Specifically, when the limiting plate is in the horizontal position, the opening faces the vertical rod.

[0085] When the limiting plate is in the horizontal position, the bottom surface of the limiting plate abuts against the fixed plate to lock the limiting plate in the horizontal position. At this time, the opening of the limiting card slot faces the first rear vertical railing 215 and can clamp and fix the first rear vertical railing 215 in the erected state to maintain the unfolded state of the handrail 2.

[0086] When the limiting plate is turned upward to disengage the first rear vertical railing 215 from the limiting card slot, the first rear vertical railing 215 can rotate downward to retract the handrail 2.

[0087] When the limiting plate is turned upward from the horizontal position to the erected state, the footpath 12 abuts against the limiting plate to limit the further rotation of the limiting plate.

[0088] The handrail 2 of the present invention is in Figure 1 and Figure 2In the situation shown in the figure, at this time, the handrail 2 is in an upright and unfolded state, the limit plate is in a horizontal position, that is, both the first vertical rail and the second vertical rail are in a vertically upright state, and the first longitudinal rail 211 and the second longitudinal rail 221 cover the length of the frame 1, increasing the protection range covered by the handrail 2 in a limited space and improving the safety of operations on the top of the tank container 100. Moreover, the first cross rail 212 and the second cross rail 222 of the handrail 2 cover a part of the width of the frame 1, so that handrails 2 are provided around the frame 1, further ensuring the safety of top operations.

[0089] Refer again to Figure 3 and Figure 4 , when it is necessary to retract the handrail 2, the limit plate is flipped to the vertical position, and then each first vertical rail is pushed towards the second rail unit 22. At this time, the first front vertical rail 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 rod 234 to rotate, thereby driving the second rear vertical rail 224 to rotate towards the first rail unit 21. While the second rear vertical rail 224 rotates, the second longitudinal rail 221 folds down and retracts; finally, when both the first vertical rail and the second vertical rail are folded on the frame 1, the folding of the handrail 2 is completed. When folding and retracting, the first front vertical rail 213 and the second rear vertical rail 224 move away from each other, and the first longitudinal rail 211 and the second longitudinal rail 221 move towards each other. Therefore, after folding, neither the first longitudinal rail 211 nor the second longitudinal rail 221 extends beyond the frame 1.

[0090] The opening operation of the handrail 2 of the present invention is basically the opposite of the aforementioned folding and retracting operation. First, each first vertical rail is rotated in a direction away from the second rail unit 22. At this time, the first front vertical rail 213 drives the first rotating shaft rod 232 to rotate, and the first rotating shaft rod 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 rod 234 to rotate, thereby driving the second rear vertical rail 224 to rotate in a direction away from the first rail unit 21. While the second rear vertical rail 224 rotates and rises, the second longitudinal rail 221 rises and unfolds; finally, when both the first vertical rail and the second vertical rail stand on the frame 1, and the limit plate is flipped to the horizontal state so that the first rear vertical rail 215 is clamped in the limit card slot of the limit plate, the unfolding of the handrail 2 is completed. When the handrail 2 unfolds, the first front vertical rail 213 and the second rear vertical rail 224 move towards each other, and the first longitudinal rail 211 and the second longitudinal rail 221 move away from each other.

[0091] In this embodiment, the handrail is lifted and unfolded or folded and retracted by a linkage mechanism with the first railing unit and the second railing unit moving away from each other simultaneously. When the handrail is folded and retracted, it does not exceed the top frame of the tank container. When lifted and unfolded, the protection range covered by the handrail is increased, improving the safety of operations on the top of the tank container. The linkage mechanism drives the first railing unit and the second railing unit to move simultaneously, enabling the simultaneous unfolding or folding of the two railing units with a single operation, which is convenient and fast. Moreover, the linkage mechanism can achieve the simultaneous movement of the first railing unit and the second railing unit through the meshing of the first rotating wheel and the second rotating wheel, with a stable structure and simple assembly.

[0092] Furthermore, the first railing unit includes a first horizontal railing, a first vertical railing, and a first longitudinal railing, and the second railing unit includes a second horizontal railing, a second vertical railing, and a second longitudinal railing, such that when the first railing unit and the second railing unit are erected and unfolded, railings are provided around the entire frame, further improving the safety of operations on the top of the tank container.

[0093] Although the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be construed broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. An armrest railing for a tank container, which is arranged on both sides of the top of the frame of the tank container. Characterized in that, It includes a first railing unit and a second railing unit that are connected end to end in the front and back along the length direction of the tank container, and a linkage mechanism; the first railing unit and the second railing unit can move away from each other simultaneously and stand upright on the top of the frame, or move towards each other simultaneously and fold up. The linkage mechanism includes: A first rotating wheel, which is fixedly connected to the first railing unit; the outer circumference of the first rotating wheel has a first meshing tooth. A second rotating wheel, which is fixedly connected to the second railing unit; the outer circumference of the second rotating wheel has a second meshing tooth, and the second meshing tooth meshes with the first meshing tooth, so that the first railing unit and the second railing unit move simultaneously. The first rotating wheel is fixedly connected to the first railing unit through a first rotating shaft rod, and the first rotating shaft rod extends along the width direction of the tank container. The second rotating wheel is fixedly connected to the railing of the second railing unit through a second rotating shaft rod, and the second rotating shaft rod extends along the width direction of the tank container.

2. The armrest railing according to claim 1, Characterized in that, The first rotating wheel and the second rotating wheel are arranged with an offset up and down.

3. The armrest railing according to claim 2, Characterized in that, The included angle between the connection line between the axis of the first rotating wheel and the axis of the second rotating wheel and the horizontal plane is 30° - 60°.

4. The armrest railing according to claim 1, Characterized in that, The central angle of the arc covering the first meshing tooth on the outer circumference of the first rotating wheel is not less than 120°; The central angle of the arc covering the second meshing tooth on the outer circumference of the second rotating wheel is not less than 120°.

5. The armrest railing according to claim 1, Characterized in that, The first rotating shaft rod and the second rotating shaft rod are installed on the frame through a connecting plate and a supporting plate, and the connecting plate and the supporting plate are arranged in parallel at intervals along the width direction of the tank container; The connecting plate is located on the side of the walkway of the tank container, and the connecting plate is provided with through holes for the first rotating shaft rod and the second rotating shaft rod to pass through respectively; The supporting plate is located below the frame and is fixedly connected to the frame, and the supporting plate is provided with through holes for the first rotating shaft rod and the second rotating shaft rod to pass through respectively.

6. The armrest railing according to claim 5, Characterized in that, One side of the supporting plate is provided with a first limit pin and a second limit pin, and both the first limit pin and the second limit pin are located between the supporting plate and the connecting plate and are close to the supporting plate; The first rotating shaft rod is provided with a first limit hole, and the axis of the first limit hole is perpendicular to the axis of the first rotating shaft rod, and the first limit pin is inserted into the first limit hole; The second rotating shaft rod is provided with a second limit hole, and the axis of the second limit hole is perpendicular to the axis of the second rotating shaft rod, and the second limit pin is inserted into the second limit hole.

7. The armrest railing according to claim 6, Characterized in that, A first retaining ring is further provided between the support plate and the first limit pin. The first retaining ring is rotatably sleeved on the first rotating shaft rod, and the first retaining ring is rotatable relative to the support plate; A second retaining ring is further provided between the support plate and the second limit pin. The second retaining ring is rotatably sleeved on the second rotating shaft rod, and the second retaining ring is rotatable relative to the support plate.

8. The handrail according to claim 1, wherein, the first railing unit includes a first longitudinal railing, a first transverse railing, and a plurality of first vertical railings arranged at intervals; the first longitudinal railing extends along the length direction of the tank container, the first transverse railing extends along the width direction of the tank container, and is connected to one end of the first longitudinal railing away from the second railing unit; the upper ends of the first vertical railings are hinged to the first longitudinal railing, the lower ends of the first vertical railings are hinged to the top of the frame, and one of the first vertical railings is fixedly connected to the first rotating wheel; when the first vertical railings rotate towards the second railing unit, the first railing unit folds up; the second railing unit includes a second longitudinal railing, a second transverse railing, and a plurality of second vertical railings arranged at intervals; the second longitudinal railing extends along the length direction of the tank container, the second transverse railing extends along the width direction of the tank container, and is connected to one end of the second longitudinal railing away from the first railing unit; the upper ends of the second vertical railings are hinged to the second longitudinal railing, the lower ends of the second vertical railings are hinged to the top of the frame, and one of the second vertical railings is fixedly connected to the second rotating wheel; when the second vertical railings rotate towards the first railing unit, the second railing unit folds up.

9. The handrail according to claim 8, wherein, the second vertical railing includes two parallel and spaced-apart upper vertical rods and lower vertical rods, and an inclined section connecting the bottom of the upper vertical rod and the top of the lower vertical rod.

10. The handrail according to claim 8, wherein, the handrail further includes a combined bracket corresponding to the linkage mechanism; 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. The first positioning groove and the second positioning groove are respectively located at opposite ends of the combined bracket.

11. The handrail according to claim 10, wherein, the handrail further includes a first bracket and a second bracket respectively located at both ends of the combined bracket along the length direction of the tank container; the first bracket corresponds to the first vertical railing and has a first clamping groove with an opening facing the first vertical railing; the second bracket corresponds to the second vertical railing and has a second clamping groove with an opening facing the second vertical railing.

12. The handrail according to claim 8, wherein, the handrail further includes a limiting member, and at least one limiting member is provided on each side of the top of the frame; Each limiting member includes a fixed plate and a limiting plate that are hinged to each other; the fixed plate is connected to the outer side of the walkway of the tank container, and the limiting plate can rotate downward to a horizontal position and be locked in the horizontal position; the limiting plate has a limiting card slot; when the limiting plate is in the horizontal position, the opening of the limiting card slot faces the first vertical railing or the second vertical railing, and can clamp and fix the first vertical railing or the second vertical railing in the erected state to maintain the unfolded state of the first railing unit and the second railing unit; when the limiting plate is turned upward to disengage the first vertical railing or the second vertical railing from the limiting card slot, the first vertical railing or the second vertical railing can rotate downward, so that the first railing unit and the second railing unit are folded and retracted.

13. A tank container, characterized in that, it includes a tank body and a frame surrounding the outside of the tank body, and is characterized in that handrails as described in any one of claims 1 to 12 are further provided on both sides of the top of the frame.

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