Composite material bench structure

Abstract

The utility model relates to a composite material ladder section structure which comprises two composite material ladder assemblies, the whole composite material ladder assemblies are strip-shaped, a composite material ladder plate is arranged between a pair of the composite material ladder assemblies, and each composite material ladder assembly comprises a ladder assembly main rod and a ladder assembly auxiliary rod. The inclined supports and the ladder plate cross beams are fixedly connected between the ladder assembly main rods and the ladder assembly auxiliary rods, the composite material ladder plates are arranged above the cross beams, compared with a common composite material ladder section, the composite material ladder section is more reasonable in structure, more uniform in stress distribution and more prominent in functional characteristics, the double-pipe structure of the ladder section is optimized and adjusted, and the service life of the ladder section is prolonged. The ladder assembly is divided into the ladder assembly main rod for main force bearing and the ladder assembly auxiliary rod for auxiliary force bearing, the auxiliary rod can also be used as a handrail, the stress distribution of the ladder section structure is optimized through the addition of the inclined support, the structural rigidity of the ladder section is coordinated, and the stability of the ladder structure is also improved through the triangular relationship among the inclined support, the ladder assembly main rod and the ladder plate cross beam.

Description

Technical Field

[0001] The utility model patent relates to the technical field of composite material ladder plate and ladder frame combined structure, specifically, to a composite material ladder section configuration. Background Art

[0002] The ladder section configurations of existing composite ladders can basically be divided into single-row tube and double-row tube structures. The single-row tube ladder section has only one load-bearing tube beam on each side of the climbing direction, which is generally suitable for situations where the load is not large and the deformation requirements of the ladder are not strong. The double-row tube structure uses two load-bearing tube beams on the left and right sides, and the two tubes are connected by several connecting tubes. Such a structure can significantly improve the structural stiffness of the ladder section and reduce stress deformation. It is suitable for situations where the size of the ladder is less restricted and stable load-bearing is required.

[0003] During the use of ordinary double-row tube composite ladders, it can be found that the ladder tubes on the lower side of the ladder structure are subjected to greater stress, while the ladder tubes on the upper side are subjected to less stress, especially the lower root of the connecting tube. The stress level here is high due to the sudden change in load direction, and there is a certain stress concentration phenomenon. Therefore, this is often the weak point of the entire ladder structure. Utility Model Content

[0004] The utility model aims to provide a composite material staircase configuration, aiming to solve the problem.

[0005] The utility model is achieved in that it comprises two composite ladder frames, the composite ladder frames are in the shape of long strips as a whole, a composite ladder board is arranged between a pair of the composite ladder frames, the composite ladder frames comprise a ladder frame main rod and a ladder frame auxiliary rod, an inclined support and a ladder board cross beam are fixedly connected between the ladder frame main rod and the ladder frame auxiliary rod, the composite ladder board is arranged above the cross beam, and its two ends are respectively connected to the ladder board cross beams on both sides by glue riveting, and the ladder board cross beam is horizontally arranged, and the ladder board cross beam, the inclined support and the ladder frame main rod form a regular triangle stable structure; the composite ladder board is installed on the surface of the ladder frame main rod by glue riveting, and the composite ladder frame is composed of the ladder frame main rod, the ladder frame auxiliary rod and the composite ladder board, the ladder frame main rod is the main load-bearing component of the ladder section, because the ladder board cross beam is horizontally arranged, its two ends are respectively connected to the ladder frame main rod and the ladder frame auxiliary rod, and the middle part is directly connected to the composite ladder board, for bearing The ladder load is transferred to the ladder main rod and the ladder sub-rod. The oblique support, the ladder main rod and the ladder crossbeam form a equilateral triangle stable structure to improve the deformation stiffness of the ladder and reduce structural deformation. The ladder sub-rod is connected to the ladder crossbeam to play an auxiliary load-bearing role and is used as a handrail. The composite ladder adopts unidirectional carbon fiber and glass fiber fabrics, the matrix resin is epoxy resin, and the molding process is a prepreg compression molding process based on internal expansion soft bag molding. Compared with ordinary composite ladder sections, its structure is more reasonable, the stress distribution is more uniform, and the functional characteristics are more prominent. The double-tube structure of the ladder section is optimized and adjusted, and it is divided into the main load-bearing ladder main rod and the secondary load-bearing ladder sub-rod. The sub-rod can also be used as a handrail. The increase of oblique support optimizes the stress distribution of the ladder section structure and coordinates the structural rigidity of the ladder section. The triangular relationship between the oblique support, the ladder main rod and the ladder crossbeam also increases the stability of the ladder structure.

[0006] Furthermore, the ladder main rod is a straight long rod with a rounded rectangular cross-section, and the ladder main rod is inclined at 60° to the horizontal plane. The inclined design of the ladder main rod can make the overall placement of the composite ladder more stable, thereby improving safety during use.

[0007] Furthermore, the upper ends of the ladder frame main rod and the ladder frame auxiliary rod are fixedly connected with the ladder section upper joint, and the lower end of the ladder frame auxiliary rod is fixedly connected with the ladder section lower joint. The ladder section upper joint and the ladder section lower joint are used for splicing between the ladder frame main rod and the ladder frame auxiliary rod. Through the design of the ladder section upper joint and the ladder section lower joint, when the overall length of the composite material ladder frame is not enough, the application range of the composite material ladder frame can be improved through splicing.

[0008] Furthermore, the composite material ladder comprises a ladder body, which is in the shape of a plate as a whole, and the lower plate surface of the ladder body is horizontal, and the upper plate surface forms an angle of 3 to 5 degrees with the horizontal direction. Connecting wings are fixedly connected on both sides of the ladder body, and a mating surface is provided at the front of the connecting wing. The mating surface cooperates with the ladder frame sub-rod to determine the front and rear position of the composite material ladder. The design of unequal thickness of the ladder body at the front and rear can prevent the soles of the workers from sliding outward on the surface of the ladder body during use, causing danger. The connecting wings are connected to the ladder crossbeams in the ladder frame structure, and a mixed connection method of glue and rivets is used to fix the left and right positions of the ladder body and transfer loads. The mating surface provided at the front of the connecting wing cooperates with the ladder frame sub-rod to determine the front and rear positions of the ladder, thereby avoiding errors in the installation direction.

[0009] Furthermore, a cavity is provided in the ladder plate body, a sliding shaft is slidably connected to the cavity through a spring, the other end of the sliding shaft passes through the side wall of the cavity for sliding connection, a notch is provided on the surface of the sliding shaft, a through groove is provided on the surface of the ladder plate body, a top shaft is slidably connected to the through groove through a spring, the top of the top shaft is conical, the other end of the top shaft is fixedly connected to a sliding rod, the other end of the sliding rod is slidably connected in the notch, and an inclined surface is provided on one side of the notch, an arc surface is provided on the end of the sliding rod, and the surface of the ladder plate body is rotatably connected through a hinge The support rod is driven by the staff to move the support rod upward, so that the top shaft extends out of the through slot and is stuck in the sole of the staff shoe, thereby increasing the friction force of the staff foot on the ladder body, and further avoiding the staff foot from sliding and causing the risk of falling.

[0010] Furthermore, there are multiple through grooves, and there are also multiple sliding rods corresponding to the grooves. An elastic ring is fixedly connected to the surface of the through groove, and the top shaft is slidably connected through the elastic ring. A roller is rotatably connected to the surface of one end of the support rod and the sliding shaft. The roller can reduce the friction between the support rod and the sliding shaft. At the same time, the elastic ring can scrape off the soil on the surface of the top shaft to avoid it being brought into the cavity and causing blockage.

[0011] Compared with the prior art, the utility model has a more reasonable structure, more uniform stress distribution, and more prominent functional characteristics. The double-tube structure of the ladder section is optimized and adjusted, and is divided into a main rod of the ladder frame that bears the main force and a secondary rod of the ladder frame that bears the secondary force. The secondary rod can also be used as a handrail. The addition of oblique supports optimizes the stress distribution of the ladder section structure and coordinates the structural rigidity of the ladder section. The triangular relationship between the oblique supports, the main rod of the ladder frame and the ladder plate crossbeam also increases the stability of the ladder structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the composite material staircase structure provided by the utility model;

[0013] Figure 2 It is a schematic diagram of a composite material ladder provided by the utility model;

[0014] Figure 3 It is a schematic diagram of a composite material ladder plate provided by the utility model;

[0015] Figure 4 It is a schematic diagram of a partial cross-sectional structure of a composite ladder plate provided by the utility model;

[0016] Figure 5 The utility model provides Figure 4 Schematic diagram of the structure at point A in the middle.

[0017] The figure numerals involved in the above drawings are: 1. composite material ladder frame; 2. composite material ladder board; 11. ladder frame main rod; 12. ladder frame auxiliary rod; 13. upper joint of ladder section; 14. lower joint of ladder section; 15. ladder board cross beam; 16. oblique support; 21. ladder board body; 22. connecting wing; 23. matching surface; 24. top shaft; 25. elastic ring; 26. through groove; 27. support rod; 28. roller; 30. sliding shaft; 31. notch; 32. sliding rod; 33. cavity; 34. turning plate. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] The implementation of the present utility model is described in detail below in conjunction with specific embodiments. Example

[0020] according to Figure 1-5 As shown, a composite ladder section configuration includes two composite ladder frames 1, the composite ladder frames 1 are in the shape of long strips as a whole, a composite ladder plate 2 is arranged between a pair of the composite ladder frames 1, the composite ladder frame 1 includes a ladder frame main rod 11 and a ladder frame auxiliary rod 12, an oblique support 16 and a ladder plate cross beam 15 are fixedly connected between the ladder frame main rod 11 and the ladder frame auxiliary rod 12, the composite ladder plate 2 is arranged above the cross beam, and its two ends are respectively connected to the ladder plate cross beams 15 on both sides by glue riveting, the ladder plate cross beam 15 is arranged horizontally, and the ladder plate cross beam 15, the oblique support 16 and the ladder frame main rod 11 form a regular triangle stable structure;

[0021] During operation, the composite ladder plate 2 is installed on the surface of the ladder frame main rod 11 by means of glue and riveting. The composite ladder frame 1 is formed by the ladder frame main rod 11, the ladder frame auxiliary rod 12 and the composite ladder plate 2. The ladder frame main rod 11 is the main load-bearing component of the ladder section. Because the ladder plate cross beam 15 is arranged horizontally, its two ends are respectively connected to the ladder frame main rod 11 and the ladder frame auxiliary rod 12, and the middle part is directly connected to the composite ladder plate 2 to bear the ladder plate load and transfer the load to the ladder frame main rod 11 and the ladder frame auxiliary rod 12. The oblique support 16, the ladder frame main rod 11 and the ladder plate cross beam 15 form a regular triangle stable structure to improve the deformation stiffness of the ladder frame and reduce structural deformation. The ladder frame auxiliary rod 12 is connected to the ladder plate cross beam 15. In order to assist in bearing and serve as a handrail, the composite ladder frame 1 adopts unidirectional carbon fiber and glass fiber fabric, the matrix resin is epoxy resin, and the molding process is a prepreg compression molding process based on internal expansion soft bag molding. Compared with ordinary composite ladder sections, its structure is more reasonable, the stress distribution is more uniform, and the functional characteristics are more prominent. The double-tube structure of the ladder section is optimized and adjusted to be divided into a main load-bearing ladder frame main rod 11 and a secondary load-bearing ladder frame secondary rod 12, and the secondary rod can also be used as a handrail. The addition of the oblique support 16 optimizes the stress distribution of the ladder section structure and coordinates the structural rigidity of the ladder section. The triangular relationship between the oblique support 16, the ladder frame main rod 11 and the ladder plate crossbeam 15 also increases the stability of the ladder structure.

[0022] The ladder frame main rod 11 is a straight long rod with a rounded rectangular cross-section, and the ladder frame main rod 11 is inclined at 60° to the horizontal plane; when working, the inclined design of the ladder frame main rod 11 can make the overall placement of the composite material ladder frame 1 more stable, thereby improving safety during use.

[0023] The upper ends of the ladder frame main rod 11 and the ladder frame auxiliary rod 12 are fixedly connected with the ladder section upper joint 13, and the lower end of the ladder frame auxiliary rod 27 is fixedly connected with the ladder section lower joint 14. The ladder section upper joint 13 and the ladder section lower joint 14 are used for splicing between the ladder frame main rod 11 and the ladder frame auxiliary rod 12; during operation, through the design of the ladder section upper joint 13 and the ladder section lower joint 14, when the overall length of the composite material ladder frame 1 is insufficient, the application range of the composite material ladder frame 1 can be improved through splicing.

[0024] The composite material ladder 2 includes a ladder body 21, which is in the shape of a plate as a whole, and the lower plate surface of the ladder body 21 is horizontal, and the upper plate surface is at an angle of 3 to 5 degrees with the horizontal direction. Connecting wings 22 are fixedly connected on both sides of the ladder body 21, and a matching surface 23 is provided at the front of the connecting wing 22. The matching surface 23 cooperates with the ladder frame auxiliary rod 12 to determine the front and rear position of the composite material ladder 2; when working, the design of unequal thickness of the front and rear of the ladder body 21 can prevent the soles of the workers from sliding outward on the surface of the ladder body 21 during use, causing danger. The connecting wing 22 is connected to the ladder crossbeam 15 in the ladder frame structure, and the mixed connection method of glue and riveting is used to fix the left and right positions of the ladder body 21 and transfer loads. The matching surface 23 provided at the front of the connecting wing 22 cooperates with the ladder frame auxiliary rod 12 to determine the front and rear positions of the ladder, avoiding errors in the installation direction.

[0025] The ladder plate body 21 is provided with a cavity 33, in which a sliding shaft 30 is slidably connected via a spring, and the other end of the sliding shaft 30 passes through the side wall of the cavity 33 for sliding connection, and a notch 31 is provided on the surface of the sliding shaft 30, and a through groove 26 is provided on the surface of the ladder plate body 21, in which a top shaft 24 is slidably connected via a spring, and the top of the top shaft 24 is conical, and a sliding rod 32 is fixedly connected to the other end of the top shaft 24, and the other end of the sliding rod 32 is slidably connected in the notch 31, and an inclined surface is provided on one side of the notch 31, and an arc surface is provided at the end of the sliding rod 32, and a rotating plate 34 is rotatably connected to the surface of the ladder plate body 21 through a hinge, and the other end of the rotating plate 34 is fixedly connected to a support rod 27, and the other end of the support rod 27 is slidably connected to the end of the sliding shaft 30;

[0026] During work, when the staff member steps on the surface of the ladder body 21, the toes will squeeze the rotating plate 34 to make it rotate, and at the same time, it will drive the support rod 27 to move, so that the support rod 27 pushes the sliding shaft 30, so that the sliding shaft 30 slides in the cavity 33, and at the same time, the inclined surface on one side of the groove 31 will push the sliding rod 32 upward, so that the top shaft 24 extends out of the through groove 26 and is stuck in the sole of the staff member, thereby increasing the friction between the sole of the staff member's foot and the ladder body 21, and further avoiding the risk of the staff member's foot sliding and falling.

[0027] There are multiple through grooves 26, and there are multiple notches 31 corresponding to the sliding rods 32. An elastic ring 25 is fixedly connected to the surface of the through groove 26, and the top shaft 24 passes through the elastic ring 25 for sliding connection. The surface of one end of the support rod 27 where it connects with the sliding shaft 30 is rotatably connected to the roller 28. When working, the roller 28 can reduce the friction between the support rod 27 and the sliding shaft 30, and at the same time, the elastic ring 25 can scrape off the mud on the surface of the top shaft 24 to avoid it being brought into the cavity 33 and causing blockage.

[0028] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] Reference Figure 1-4 As shown, it is a preferred embodiment provided by the utility model.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite material staircase configuration, characterized in that: The invention comprises two composite ladder frames (1), wherein the composite ladder frames (1) are in the shape of long strips as a whole, a composite ladder plate (2) is arranged between a pair of the composite ladder frames (1), the composite ladder frames (1) comprise a ladder frame main rod (11) and a ladder frame auxiliary rod (12), an inclined support (16) and a ladder plate cross beam (15) are fixedly connected between the ladder frame main rod (11) and the ladder frame auxiliary rod (12), the composite ladder plate (2) is arranged above the cross beam, and its two ends are respectively connected to the ladder plate cross beams (15) on both sides by glue riveting.

2. A composite material staircase configuration according to claim 1, characterized in that: The ladder frame main rod (11) is a straight long rod with a rounded rectangular cross-section, and the ladder frame main rod (11) is inclined at an angle of 60° to the horizontal plane.

3. A composite material staircase configuration according to claim 2, characterized in that: The upper ends of the ladder frame main rod (11) and the ladder frame auxiliary rod (12) are both fixedly connected to a ladder section upper joint (13), and the lower end of the ladder frame auxiliary rod (12) is fixedly connected to a ladder section lower joint (14). The ladder section upper joint (13) and the ladder section lower joint (14) are used for splicing the ladder frame main rod (11) and the ladder frame auxiliary rod (12).

4. A composite material staircase configuration according to claim 3, characterized in that: The ladder plate cross beam (15) is arranged horizontally, and the ladder plate cross beam (15), the inclined support (16), and the ladder frame main rod (11) form a regular triangle stable structure.

5. A composite material staircase configuration according to claim 4, characterized in that: The composite material ladder plate (2) comprises a ladder plate body (21), the ladder plate body (21) being in the shape of a plate as a whole, the lower plate surface of the ladder plate body (21) being horizontal, and the upper plate surface forming an angle of 3 to 5 degrees with the horizontal direction, connecting wings (22) being fixedly connected to both sides of the ladder plate body (21), the front part of the connecting wing (22) being provided with a mating surface (23), the mating surface (23) being mated with the ladder frame auxiliary rod (12) to determine the front and rear position of the composite material ladder plate (2).

6. A composite material staircase configuration according to claim 5, characterized in that: A cavity (33) is provided in the ladder plate body (21), a sliding shaft (30) is slidably connected to the cavity (33) via a spring, the other end of the sliding shaft (30) passes through the side wall of the cavity (33) for sliding connection, a notch (31) is provided on the surface of the sliding shaft (30), a through groove (26) is provided on the surface of the ladder plate body (21), a top shaft (24) is slidably connected to the through groove (26) via a spring, the top of the top shaft (24) is conical, and the top The other end of the shaft (24) is fixedly connected to a slide rod (32), the other end of the slide rod (32) is slidably connected in the slot (31), and a slope is provided on one side of the slot (31), and an arc surface is provided at the end of the slide rod (32), and a rotating plate (34) is rotatably connected to the surface of the ladder plate body (21) via a hinge, the other end of the rotating plate (34) is fixedly connected to a support rod (27), and the other end of the support rod (27) is slidably connected to the end of the slide shaft (30).

7. A composite material staircase configuration according to claim 6, characterized in that: A plurality of through grooves (26) are provided, and a plurality of notches (31) are also provided corresponding to the slide bars (32). An elastic ring (25) is fixedly connected to the surface of the through groove (26), the top shaft (24) passes through the elastic ring (25) and is slidably connected thereto, and a roller (28) is rotatably connected to the surface of one end of the support rod (27) where it is connected to the slide shaft (30).

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