Safety climbing ladder for containers

Abstract

The application discloses a safe climbing operation ladder for a container, which comprises a ladder frame and a fixing frame. The ladder frame is provided with a climbing staircase which is gradually raised along a first horizontal direction, and the bottom of the ladder frame is provided with moving wheels, wherein the first horizontal direction is the same as the length direction of the container. The fixing frame is connected to the ladder frame and located at the side of the climbing staircase, and the fixing frame is provided with two fixing columns which are spaced apart along the first horizontal direction and vertically extended, and the two fixing columns are respectively used for fixed connection with corner fittings at the front end and the rear end of the container, and a hanging rope is arranged between the top of the two fixing columns and used for hanging a safety rope. According to the safe climbing operation ladder for the container, on the one hand, the stability of the climbing staircase at high and low positions can be strengthened and the safety can be improved by fixing the container, and on the other hand, the safety can be further improved by arranging the hanging rope and enabling workers to hang the safety rope.

Description

Technical Field

[0001] This utility model relates to the field of container technology, and more specifically to a safe ladder for container access. Background Technology

[0002] With the development of the container industry, the demand for containers is increasing, and the inspection and maintenance of the container top surface has become an important task. Due to the special nature of the container industry, container top inspection and maintenance are all concentrated in the container yard. The container yard operates forklifts, stackers, and container turnover vehicles, requiring the container yard to be a wide open space without any obstacles. As a result, there are no fixed safety rope attachment points for container top inspection and maintenance work in the yard.

[0003] Operators use straight ladders, suspended ladders, and climbing ladders to climb to the top of the container for inspection and maintenance. Because there are no safety rope attachment points, safety protection is lacking, and workers are at risk of falling.

[0004] Therefore, a safe ladder for container access is needed to at least partially solve the above problems. Utility Model Content

[0005] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0006] To at least partially solve the above problems, this utility model provides a safe ladder for container access, the safe ladder for container access comprising: A ladder frame, the ladder frame having a staircase that rises step by step along a first horizontal direction, the bottom of the ladder frame being provided with casters, wherein the first horizontal direction is the same as the length direction of the container; A fixing frame is connected to the ladder frame and located on the side of the climbing stairs. The fixing frame has two fixing posts spaced apart along the first horizontal direction. The fixing posts extend vertically and are respectively used to fix and connect to the corner pieces of the front and rear ends of the container. A hanging cable is provided between the tops of the two fixing posts for attaching a safety rope.

[0007] The container safety ladder according to this application, on the one hand, can be reinforced with the container to enhance the stability of the ladder at both high and low points, thus improving safety; on the other hand, by setting up hanging ropes, workers can attach safety ropes, further improving safety.

[0008] Optionally, the mounting bracket includes: A fixed seat assembly is disposed on the side of the ladder frame, and the fixed seat assembly includes at least two fixed seats spaced apart along the first horizontal direction; A telescopic rod assembly, comprising two telescopic rods, the telescopic rods extending along a first horizontal direction and passing through at least two of the fixed seats of the fixed seat assembly, and the telescopic rods being movable relative to the fixed seats along the first horizontal direction, the two ends of the telescopic rods forming a connecting end and a free end respectively, the two connecting ends of the two telescopic rods being respectively connected to two fixed columns, wherein the two connecting ends of the two telescopic rods are far apart from each other.

[0009] Optionally, the free end of the telescopic rod is provided with a first limiting member, which is used to prevent the connecting end from detaching from the fixed base.

[0010] Optionally, the two telescopic rods of the telescopic rod assembly are arranged vertically.

[0011] Optionally, the fixing base includes: Seat body, the seat body being connected to the ladder frame; Three rollers are arranged vertically at intervals in the base, and the three rollers are connected to the base via bearings; The two telescopic rods of the telescopic rod assembly pass through the fixed base through two gaps formed by the three rollers.

[0012] Optionally, the fixing post includes: A column, the column extending vertically; A bottom connecting part is connected to the bottom end of the column and is used to fix it to the bottom corner piece of the container. A top connecting portion, which is connected to the column and located above the bottom connecting portion, has a vertically movable connecting rod for fixed connection with the top corner piece of the container.

[0013] Optionally, the bottom connecting portion includes: A lead screw, which is rotatably disposed through the column, extends along a second horizontal direction, which is perpendicular to the first horizontal direction; A lock head is disposed at the end of the lead screw facing away from the staircase, and the shape of the lock head matches the connecting hole of the bottom corner piece; The second limiting member is disposed at the end of the lead screw facing the staircase; A nut is fitted onto the lead screw and located between the lock head and the column.

[0014] Optionally, the top connecting portion further includes: The sleeve rods are spaced apart on the side of the column facing away from the staircase, and the connecting rod is telescopically disposed in the sleeve rods; A connecting rod, which connects the sleeve and the column; The third limiting member is disposed at the upper end of the connecting rod; A locking rod is detachably mounted on the sleeve rod, and the connecting rod is provided with a plurality of locking holes along the vertical direction, wherein the locking rod can extend into the locking holes to fix the connecting rod.

[0015] Optionally, the side of the column is provided with a winding part, which is used to wind and lock the hanging rope.

[0016] Optionally, the movable wheel includes a braking device. Attached Figure Description

[0017] The following drawings, which are incorporated herein by reference as part of this invention, are used to understand the invention. The drawings illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the drawings: Figure 1 This is a perspective view of a container safety ladder according to one embodiment of this application; Figure 2 for Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 for Figure 1 Enlarged schematic diagram of part B; Figure 4 for Figure 1 An enlarged schematic diagram of section C; Figure 5 This is a perspective view of a container safety ladder connected to a container according to one embodiment of this application; Figure 6 for Figure 5 An enlarged schematic diagram of part D in the middle; and Figure 7 for Figure 5 An enlarged schematic diagram of section E in the middle.

[0018] Explanation of reference numerals in the attached figures: 10: Container; 11: Corner fittings; 12: Corner fittings; 100: Container safety ladder for working at height; 110: Ladder; 111: Staircase for climbing; 112: Casters; 120: Mounting bracket; 130: Fixed base; 131: Base body; 132: Roller; 133: Telescopic rod; 134: First limiting component; 140: Fixing post; 141: Column; 142: Winding part; 143: Hanging cable; 150: Bottom connection part; 151: Lead screw; 152: Lock head; 153: Nut component; 154: Second limiting component; 160: Top connecting part; 161: Sleeve rod; 162: Connecting rod; 163: Linking rod; 164: Locking bar; 165: Third limiting component; D1: First horizontal direction; D2: Second horizontal direction. Detailed Implementation

[0019] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0021] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and do not have any other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of a "second component," and the term "second component" does not imply the existence of a "first component." It should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "inner," "outer," and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0022] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

[0023] refer to Figure 1 and Figure 5 This application provides a safe access ladder 100 for containers, which includes a ladder frame 110 and a fixing frame 120. The ladder frame 110 has a staircase 111 that rises progressively along a first horizontal direction D1. The bottom of the ladder frame 110 is equipped with casters 112. The first horizontal direction D1 is the same as the length direction of the container 10. The fixing frame 120 is connected to the ladder frame 110 and located on the side of the staircase 111. The fixing frame 120 has two fixing posts 140 spaced apart along the first horizontal direction D1. The fixing posts 140 extend vertically and are respectively used for fixed connection to the corner brackets at the front and rear ends of the container 10. A hanging cable 143 is provided between the tops of the two fixing posts 140 for attaching a safety rope.

[0024] According to the container safety ladder 100 of this application, on the one hand, it can be fixed to the container 10 to enhance the stability of the ladder 111 at high and low points, thereby improving safety; on the other hand, by setting up the hanging cable 143, workers can hang safety ropes, which further improves safety.

[0025] More specifically, the specifications of the staircase 111 are as follows: the vertical distance between two adjacent tread surfaces is ≤250mm, the step width is 760mm, the handrail spacing is 160mm, and the handrail height is ≥1100mm. Preferably, the casters 112 are swivel casters equipped with brakes.

[0026] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The mounting frame 120 includes a fixed base assembly and a telescopic rod assembly. The fixed base assembly is located on the side of the ladder frame 110 and includes at least two fixed bases 130 spaced apart along a first horizontal direction D1. The telescopic rod assembly includes two telescopic rods 133, which extend along the first horizontal direction D1 and pass through at least two fixed bases 130 of the fixed base assembly. The telescopic rods 133 are movable relative to the fixed bases 130 along the first horizontal direction D1. The two ends of the telescopic rods 133 form a connecting end and a free end, respectively. The two connecting ends of the two telescopic rods 133 are respectively connected to two fixed posts 140, with the two connecting ends of the two telescopic rods 133 being far apart from each other. The free end of the telescopic rod 133 is provided with a first limiting member 134, which prevents the connecting end from detaching from the fixed base 130. This arrangement allows the width of the mounting frame 120 to be adjustable to accommodate containers 10 of different lengths.

[0027] As an optional implementation, the two fixed seats 130 of the fixed seat assembly are respectively connected to the supports at both ends of the ladder frame 110 along the first horizontal direction D1. Preferably, the container safety access ladder 100 has two sets of fixed seat assemblies and two sets of telescopic rod assemblies. One set of fixed seat assemblies and telescopic rod assemblies is located at the bottom, and the other set is located at the top. It is easy to understand that the support at the lower end of the ladder frame 110 is relatively short. In order to facilitate the installation of the second set of fixed seat assemblies at the top, the support at the lower end can be extended upward and connected to the handrail via a horizontally arranged auxiliary rod.

[0028] More specifically, see reference Figure 2 The fixed base 130 includes a base body 131 and three rollers 132. The base body 131 is connected to the ladder frame 110. The three rollers 132 are vertically spaced within the base body 131 and connected to the base body 131 via bearings. This creates two vertical gaps between the three rollers 132. Two telescopic rods 133 of the telescopic rod assembly are vertically arranged and pass through the fixed base 130 through the two gaps formed by the three rollers 132. Therefore, when one telescopic rod 133 is extended outward, the other telescopic rod 133 receives an opposite force, making it easier to extend outward.

[0029] refer to Figure 3 , Figure 4 , Figure 6 and Figure 7 The fixing post 140 includes a post body 141, a bottom connecting part 150, and a top connecting part 160. The post body 141 extends vertically, and the hanging cable 143 is connected between the top ends of two posts 141. The side of the post body 141 is provided with a winding part 142, which is used to wind and lock the hanging cable 143 to improve safety.

[0030] refer to Figure 3 and Figure 6The bottom connecting portion 150 is connected to the bottom end of the column 141 and is used for fixed connection with the bottom corner piece 12 of the container 10. The bottom connecting portion 150 includes a lead screw 151, a locking head 152, a second limiting member 154, and a nut 153. The lead screw 151 is rotatably disposed through the column 141 and extends along a second horizontal direction D2, which is perpendicular to the first horizontal direction D1. The locking head 152 is disposed at the end of the lead screw 151 facing away from the ladder 111, and the shape of the locking head 152 matches the connecting hole of the bottom corner piece 12. The second limiting member 154 is disposed at the end of the lead screw 151 facing the ladder 111 and is used to prevent the lead screw 151 from detaching from the column 141. The nut 153 is sleeved on the lead screw 151 and located between the locking head 152 and the column 141. The cover lock head 152 can pass through the connecting hole of the bottom corner piece 12 and engage with the bottom corner piece 12 after the lead screw 151 is rotated, while locking the nut piece 153, thus completing the fixation of the bottom connecting part 150 and the bottom corner piece 12.

[0031] refer to Figure 4 and Figure 7 The top connecting part 160 is connected to the column 141 and located above the bottom connecting part 150. The top connecting part 160 includes a sleeve rod 161, a connecting rod 162, a connecting rod 163, a third limiting member 165, and a locking rod 164. The sleeve rods 161 are spaced apart on the side of the column 141 facing away from the climbing stairs 111. The connecting rods 162 connect the sleeve rods 161 and the column 141. The connecting rods 163 are telescopically disposed within the sleeve rods 161; in other words, the connecting rods 163 can move vertically within the sleeve rods 161. The connecting rods 163 are used for fixed connection with the top corner piece 11 of the container 10, and have multiple locking holes vertically arranged on their upper edge. The third limiting member 165 is disposed at the upper end of the connecting rods 163 and is used to prevent the connecting rods 163 from detaching from the sleeve rods 161. The locking rod 164 is detachably mounted on the sleeve rod 161, and the locking rod 164 can extend into the locking hole to fix the connecting rod 163. Therefore, by adjusting the height of the connecting rod 163, it can accommodate containers 10 of different heights. Furthermore, the fixing at both ends ensures that the container safety ladder 100 will not move relative to the container 10 during use.

[0032] When work needs to be done on the top of container 10, first activate the brake device on the moving wheels 112 of the container safety ladder 100 to move it to the side of container 10, and adjust the telescopic rod assembly to accommodate the width of container 10. Align the locking head 152 at the bottom of the fixed rod with the side of the bottom corner piece 12, and rotate the screw 151 to match the shape of the locking head 152 with the shape of the connecting hole in the bottom corner piece 12. Move the container safety ladder 100 again to allow the locking head 152 to enter the bottom corner piece 12. Then rotate the screw 151 to engage the locking head 152 with the connecting piece, and simultaneously tighten the nut 153 onto the bottom corner piece 12 to lock it in place. Next, adjust the top connecting part 160, pull out the locking rod 164 of the top connecting part 160, move the connecting rod 163 downward to insert it into the fixed corner piece, and then insert the locking rod 164 back into the sleeve rod 161 and the connecting rod 163 to fix the connecting rod 163. In addition, the hanging cable 143 needs to be connected to the top of the column 141 of the fixed column 140. One side of the hanging cable 143 is pulled taut along the height direction of the column 141 and wrapped around the winding part 142. After ensuring that the hanging cable 143 has been pulled taut to a suitable degree, the hanging cable 143 is fixed to the winding part 142.

[0033] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of the invention. Features described in one embodiment may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

[0034] This utility model has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative purposes. This utility model is not limited to the above embodiments. Many variations and modifications can be made based on the teachings of this utility model, and all such variations and modifications fall within the scope of protection claimed by this utility model.

Claims

1. A safe ladder for working at heights on containers, characterized in that, The container safety ladder includes: A ladder frame, the ladder frame having a staircase that rises step by step along a first horizontal direction, the bottom of the ladder frame being provided with casters, wherein the first horizontal direction is the same as the length direction of the container; A fixing frame is connected to the ladder frame and located on the side of the climbing stairs. The fixing frame has two fixing posts spaced apart along the first horizontal direction. The fixing posts extend vertically and are respectively used to fix and connect to the corner pieces of the front and rear ends of the container. A hanging cable is provided between the tops of the two fixing posts for attaching a safety rope.

2. The container safety ladder according to claim 1, characterized in that, The fixing frame includes: A fixed seat assembly is disposed on the side of the ladder frame, and the fixed seat assembly includes at least two fixed seats spaced apart along the first horizontal direction; A telescopic rod assembly, comprising two telescopic rods, the telescopic rods extending along a first horizontal direction and passing through at least two of the fixed seats of the fixed seat assembly, and the telescopic rods being movable relative to the fixed seats along the first horizontal direction, the two ends of the telescopic rods forming a connecting end and a free end respectively, the two connecting ends of the two telescopic rods being respectively connected to two fixed columns, wherein the two connecting ends of the two telescopic rods are far apart from each other.

3. The container safety ladder according to claim 2, characterized in that, The free end of the telescopic rod is provided with a first limiting member, which is used to prevent the connecting end from detaching from the fixed base.

4. The container safety ladder according to claim 2, characterized in that, The two telescopic rods of the telescopic rod assembly are arranged vertically.

5. The container safety ladder according to claim 4, characterized in that, The fixing base includes: Seat body, the seat body being connected to the ladder frame; Three rollers are arranged vertically at intervals in the base, and the three rollers are connected to the base via bearings; The two telescopic rods of the telescopic rod assembly pass through the fixed base through two gaps formed by the three rollers.

6. The safe ladder for container access as described in claim 2, characterized in that, The fixing column includes: A column, the column extending vertically; A bottom connecting part is connected to the bottom end of the column and is used to fix it to the bottom corner piece of the container. A top connecting portion, which is connected to the column and located above the bottom connecting portion, has a vertically movable connecting rod for fixed connection with the top corner piece of the container.

7. The safe ladder for container access as described in claim 6, characterized in that, The bottom connecting portion includes: A lead screw, which is rotatably disposed through the column, extends along a second horizontal direction, which is perpendicular to the first horizontal direction; A lock head is disposed at the end of the lead screw facing away from the staircase, and the shape of the lock head matches the connecting hole of the bottom corner piece; The second limiting member is disposed at the end of the lead screw facing the staircase; A nut is fitted onto the lead screw and located between the lock head and the column.

8. The safe ladder for container access as described in claim 6, characterized in that, The top connecting portion further includes: The sleeve rods are spaced apart on the side of the column facing away from the staircase, and the connecting rod is telescopically disposed in the sleeve rods; A connecting rod, which connects the sleeve and the column; The third limiting member is disposed at the upper end of the connecting rod; A locking rod is detachably mounted on the sleeve rod, and the connecting rod is provided with a plurality of locking holes along the vertical direction, wherein the locking rod can extend into the locking holes to fix the connecting rod.

9. The safety ladder for container access as described in claim 6, characterized in that, The side of the column is provided with a winding part, which is used to wind and lock the hanging rope.

10. The safe ladder for container access as described in claim 1, characterized in that, The moving wheel includes a braking device.

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