Novel rack rail type crawling ladder and conveying device
By using the mechanical structure of rubber wheel set and emergency locker on the ladder, the safety belt hook is automatically locked, which solves the problem of frequent operation of the hook affecting efficiency, improves the safety performance of anti-fall, and achieves efficient and safe crawling. Reduced costs and structural damage.
Patent Information
- Application Number
- CN202420853804.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-23
AI Technical Summary
The existing ladders need to frequently operate the seat belt hook during climbing during maintenance personnel, which affects the crawling efficiency and cannot provide sufficient anti-fall safety guarantee when removing the hook, resulting in a reduction in safety and speed.
A new type of gear rail ladder is designed, using rubber wheel set and emergency locker. Through the mechanical structure of the hanging ring block and the top block, the seat belt hook is automatically locked to avoid frequent operation, and the centrifugal lock is used when falling. The friction between the stopper and the rubber wheel prevents downward movement, improving the safety performance against falls.
It realizes efficient crawling without frequent operation of the hook, significantly improves crawling efficiency and fall safety performance, and eliminates the need for additional cages and ladder platforms, reducing costs and structural damage.
Smart Images
Figure CN222162474U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of ladders, and in particular to a novel rack-type ladder and a conveying device. Background Art
[0002] At present, for the maintenance ladders installed on the inner climbing tower cranes used in the construction of buildings and bridge piers, as well as the power supply towers, radio and television towers, telecommunication signal towers, thermal power plants, cooling towers of nuclear power plants, chimneys and other tall structures, in order to climb safely and prevent falling, the maintenance personnel need to wear safety belts (safety ropes, fall arresters), and the hooks of the safety belts are hung on the ladders. During the process of climbing along the ladder, the maintenance personnel need to constantly remove and hang the hooks of the safety belts, which greatly affects the climbing efficiency, and the moment of removal cannot provide anti-fall safety protection. Even the double-hook safety belt has greatly reduced safety and will further reduce the climbing speed. Therefore, the climbing efficiency and anti-fall safety performance of the existing ladder form need to be further improved. Utility Model Content
[0003] Based on this, the present application provides a new rack-type ladder and conveying device, which can eliminate the operation of constantly removing and hanging hooks during the climbing process, greatly improve the climbing efficiency, and improve the anti-fall safety performance. The present application also provides a conveying device, which can realize the conveying of items by using the new rack-type ladder plus a driving mechanism.
[0004] To achieve the above purpose, the technical solution adopted in this application is as follows:
[0005] A novel rack-type ladder and conveying device, comprising: a ladder body; a rack component, comprising an I-shaped guide rail arranged on the ladder body and a rack arranged on the front side of the I-shaped guide rail; a movable locking component, comprising a movable frame, a rubber wheel set and an emergency locker arranged on the movable frame, wherein the rubber wheel set comprises two rubber wheels arranged in parallel and one-to-one on the guide grooves on both sides of the I-shaped guide rail, the central axis of the rubber wheel is connected to a centrifugal locker, and the emergency locker comprises a first rotating shaft and a predetermined locking device around the first rotating shaft. A first brake block, a top connection block, and a hanging ring block are fixedly connected to the first rotating shaft at angular intervals. The first rotating shaft is rotatably installed on the moving frame. The hanging ring block is used to buckle with the hook of the safety belt. The hanging ring block is driven upward to make the top connection block press the moving frame. When the top connection block presses the moving frame, the first brake block is disengaged from the rack. The hanging ring block is driven downward to make the first brake block insert into the inter-tooth groove of the rack. When the first brake block is inserted into the inter-tooth groove of the rack, the top connection block is disengaged from the moving frame.
[0006] Furthermore, a plurality of the rubber wheel groups are provided on the movable frame.
[0007] Furthermore, the movable locking component also includes a temporary lock, which includes a second rotating shaft and a second brake block and a pressing block fixedly connected to the second rotating shaft at predetermined angle intervals around the second rotating shaft. The second rotating shaft is rotatably mounted on the movable frame, and the second brake block is used to be inserted into the inter-tooth groove of the rack. The pressing block is connected to the movable frame via an elastic member, and under the action of the elastic member, the lock is maintained in a state where the second brake block is disengaged from the rack.
[0008] Furthermore, the novel rack-type ladder also includes a seat plate, and the seat plate is installed on the movable frame.
[0009] Furthermore, the new rack-type ladder is provided with two movable locking components, the two movable locking components are spaced apart up and down, two vertical connecting rods are provided between the two movable locking components, the two vertical connecting rods are symmetrically arranged on the left and right sides of the I-shaped guide rail, the upper ends of the vertical connecting rods are fixedly connected to the movable frame of the upper movable locking component, the lower ends are provided with abutments, and a movable connecting rod is hinged on the vertical connecting rod through a pin shaft; the seat plate is hinged to the movable frame of the lower movable locking component, and the movable connecting rod is hinged to the seat plate, and when the seat plate is horizontally arranged, the abutment abuts against the top end of the movable frame of the lower movable locking component, and the seat plate presses down the hanging ring block of the lower movable locking component to insert the first brake block into the inter-tooth groove of the rack.
[0010] Furthermore, the novel rack-type ladder also includes an alarm, which is arranged on the movable frame.
[0011] Furthermore, the novel rack-type ladder also includes a lighting lamp, which is arranged on the movable frame.
[0012] Furthermore, the ladder body extends in a vertical direction, and a plurality of pedals are evenly spaced apart on the ladder body along the extending direction.
[0013] A conveying device comprises a novel rack-type ladder as described in any of the above items, wherein a climbing drive mechanism and a locking drive mechanism are installed on the moving frame of the moving locking component, the climbing drive mechanism is used to drive the two rubber wheels of the rubber wheel group to rotate in opposite directions, and the locking drive mechanism is used to drive the first rotating shaft to rotate.
[0014] The new rack-type ladder of the present application has an I-shaped guide rail on the main body of the ladder, and the movable locking component is installed on the I-shaped guide rail through a rubber wheel group so that it can move along the I-shaped guide rail. The central axis of the rubber wheel is connected to a centrifugal locker, so if a person falls and drives the movable locking component to move downward quickly, the centrifugal locker will lock the rubber wheel, and the rubber wheel will not rotate, but will produce a large friction with the I-shaped guide rail to prevent the movable locking component from moving downward. A rack is provided on the front side of the I-shaped guide rail, and a first rotating shaft is rotatably installed on the movable frame of the movable locking component. A first brake block, a top block, and a hanging ring block are fixedly connected to the first rotating shaft at a predetermined angle around the first rotating shaft to form an emergency locker, and the emergency locker locks the movable locking component on the I-shaped guide rail by inserting the first brake block into the inter-tooth groove of the rack. When climbing a ladder, a person wears a safety belt and fastens the hook of the safety belt to the hanging ring block. When climbing up, the person pulls the hanging ring block upward, and the first rotating shaft rotates upward to make the top block press the movable frame. At this time, the first brake block is separated from the rack. When the person continues to climb up, the movable locking component will be driven to move upward along the I-shaped guide rail. If the person suddenly falls, the hanging ring block will be pulled downward, and the first rotating shaft will rotate downward to make the first brake block insert into the inter-tooth groove of the rack, thereby locking the movable locking component on the I-shaped guide rail. If the first brake block breaks and fails, the friction between the rubber wheel and the I-shaped guide rail can also prevent the movable locking component from continuing to move downward, thereby preventing the person from continuing to fall. Therefore, the novel rack-type ladder of the present application does not need to continuously remove and hang the hook during the climbing process, thereby greatly improving the climbing efficiency. The setting of the emergency locker and the rubber wheel connected to the centrifugal locker effectively improves the anti-fall safety performance. The conveying device of the present application utilizes the novel rack-type ladder to fix the articles to be conveyed on the mobile rack, and drives the two rubber wheels of the rubber wheel group to rotate in opposite directions through the climbing drive mechanism so that the mobile rack automatically moves along the I-shaped guide rail, and drives the first rotating shaft to rotate through the locking drive mechanism to lock and unlock the emergency lock, thereby realizing the conveying of the articles. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0016] Figure 1 This is a front view of the novel rack-type ladder of the present application;
[0017] Figure 2 A side view of the novel rack-type ladder of the present application;
[0018] Figure 3 for Figure 2 A perspective diagram of
[0019] Figure 4 A top view of the novel rack-type ladder of the present application;
[0020] Figure 5 This is a schematic diagram of the structure of the ladder body and the rack rail components in the novel rack rail ladder of the present application;
[0021] Figure 6 This is a schematic diagram of the structure of the rubber wheel connected to the centrifugal lock in the novel rack-type ladder of the present application in the normal and locked states;
[0022] Figure 7 This is a schematic diagram of the structure of the novel rack-type ladder of the present application when a seat plate is installed;
[0023] Figure 8 for Figure 7 A schematic diagram of the structure in which the middle seat plate is installed on the movable locking component below;
[0024] Fig. 9 This is a schematic diagram of the structure of the new rack-type ladder installed with an alarm and a lighting lamp in the present application.
[0025] Description of reference numerals:
[0026] 10. Ladder body; 11. Pedal rod; 21. I-shaped guide rail; 22. Rack; 30. Moving locking component; 31. Moving frame; 321. Rubber wheel; 322. Centrifugal locker; 33. Emergency locker; 331. First rotating shaft; 332. First brake block; 333. Top block; 334. Hanging ring block; 34. Temporary locker; 341. Second rotating shaft; 342. Second brake block; 343. Pressing block; 344. Elastic member; 40. Seat plate; 51. Vertical connecting rod; 52. Abutment; 53. Pin shaft; 54. Movable connecting rod; 60. Alarm; 70. Light. DETAILED DESCRIPTION
[0027] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings. The present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.
[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0030] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0031] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0032] refer to Figures 1 to 5 The present application provides a novel rack-type ladder, comprising a ladder body 10, a rack component and a movable locking component 30.
[0033] The ladder body 10 extends in a vertical direction, and a plurality of pedal rods 11 are evenly spaced and distributed on the ladder body 10 along the extending direction.
[0034] The rack rail component includes an I-shaped guide rail 21 disposed on the ladder body 10 and a rack 22 disposed on the front side of the I-shaped guide rail 21 .
[0035] The mobile locking component 30 includes a mobile frame 31, a rubber wheel set and an emergency lock 33 arranged on the mobile frame 31. The rubber wheel set includes two rubber wheels 321 arranged in parallel and one-to-one correspondence on two guide grooves of the I-shaped guide rail 21, and the mobile frame 31 is installed on the I-shaped guide rail 21 through the rubber wheel set so that it can move upward along the I-shaped guide rail 21. A plurality of rubber wheel sets can be provided. The emergency lock 33 includes a first rotating shaft 331 and a first brake block 332, a top block 333, and a hanging ring block 334 fixedly connected to the first rotating shaft 331 at predetermined angle intervals around the first rotating shaft 331. The first rotating shaft 331 is rotatably mounted on the moving frame 31. The hanging ring block 334 is used to buckle with the hook of the safety belt. The hanging ring block 334 is driven upward to cause the top block 333 to press the moving frame 31. When the top block 333 presses the moving frame 31, the first brake block 332 disengages from the rack 22. The hanging ring block 334 is driven downward to cause the first brake block 332 to be inserted into the inter-tooth groove of the rack 22. When the first brake block 332 is inserted into the inter-tooth groove of the rack 22, the top block 333 disengages from the moving frame 31.
[0036] like Figure 6 As shown, the central axis of the rubber wheel 321 is connected to the centrifugal locker 322. The centrifugal locker 322 adopts the reel locking structure of the existing automobile seat belt. Just as the reel is locked under rapid rotation, the central axis of the rubber wheel 321 will be locked when it rotates rapidly, so that the rubber wheel 321 cannot continue to rotate and generates great friction with the I-shaped guide rail 21.
[0037] The novel rack-type ladder has an I-shaped guide rail 21 on the ladder body 10, and the movable locking component 30 is installed on the I-shaped guide rail 21 through a rubber wheel set so that it can move along the I-shaped guide rail 21. The central axis of the rubber wheel 321 is connected to the centrifugal lock 322. Therefore, if a person falls and drives the movable locking component 30 to move downward quickly, the centrifugal lock 322 will lock the central axis of the rubber wheel 321, and the rubber wheel 321 will not rotate, but will produce a large friction with the I-shaped guide rail 21 to prevent the movable locking component 30 from continuing to move downward. A rack 22 is provided on the front side of the I-shaped guide rail 21, and a first rotating shaft 331 is rotatably installed on the movable frame 31 of the movable locking component 30. A first brake block 332, a top block 333, and a hanging ring block 334 are fixedly connected to the first rotating shaft 331 at predetermined angle intervals around the first rotating shaft 331 to form an emergency lock 33. The emergency lock 33 locks the movable locking component 30 on the I-shaped guide rail 21 by inserting the first brake block 332 into the inter-tooth groove of the rack 22. When the person climbs up the ladder, the person wears a safety belt and buckles the hook of the safety belt on the hanging ring block 334. When the person climbs up, the hanging ring block 334 is pulled upward, and the first rotating shaft 331 rotates upward to make the top block 333 press the movable frame 31. At this time, the first brake block 332 is disengaged from the rack 22. When the person continues to climb up, the movable locking component 30 is driven to move upward along the I-shaped guide rail 21. If the person falls suddenly, the hanging ring block 334 will be pulled downward, and the first rotating shaft 331 will rotate downward to make the first brake block 332 insert into the intertooth groove of the rack 22, thereby locking the movable locking component 30 on the I-shaped guide rail 21. If the first brake block 332 breaks and fails, the friction generated by the rubber wheel 321 and the I-shaped guide rail 21 can also prevent the movable locking component 30 from continuing to move downward, thereby preventing the person from continuing to fall. Therefore, the new rack-type ladder of the present application does not need to constantly remove and hang the hook during the climbing process, thereby greatly improving the climbing efficiency. The setting of the emergency lock 33 and the rubber wheel 321 connected to the centrifugal lock 322 effectively improves the anti-fall safety performance.
[0038] In some embodiments, reference Figure 1 , Figure 2 and Figure 3The movable locking component 30 further includes a temporary locker 34, which includes a second rotating shaft 341, a second brake block 342 and a pressing block 343 fixedly connected to the second rotating shaft 341 at a predetermined angle around the second rotating shaft 341, the second rotating shaft 341 is rotatably mounted on the movable frame 31, the second brake block 342 is used to insert into the inter-tooth groove of the rack 22, the pressing block 343 is connected to the movable frame 31 through an elastic member 344, and the locker is kept in a state where the second brake block 342 is separated from the rack 22 under the action of the elastic member 344. It can be understood that by pressing the pressing block 343, the second rotating shaft 341 is rotated downward to insert the second brake block 342 into the inter-tooth groove of the rack 22, the movable locking component 30 can be temporarily locked, and the movable locking component 30 cannot move up and down.
[0039] In some embodiments, the novel rack-type ladder further includes a seat board 40, and the seat board 40 is installed on the mobile frame 31. The seat board 40 is provided for people to take a rest.
[0040] For further reference, Figure 7 and Figure 8 The novel rack-type ladder is provided with two movable locking components 30, and the two movable locking components 30 are spaced apart from each other. Two vertical connecting rods 51 are provided between the two movable locking components 30, and the two vertical connecting rods 51 are symmetrically arranged on the left and right sides of the I-shaped guide rail 21. The upper end of the vertical connecting rod 51 is fixedly connected to the movable frame 31 of the movable locking component 30 above, and the lower end is provided with abutment 52. A movable connecting rod 54 is hinged on the vertical connecting rod 51 through a pin shaft 53; the seat plate 40 is hinged on the movable frame 31 of the movable locking component 30 below, and the movable connecting rod 54 is hinged on the seat plate 40. When the seat plate 40 is horizontally arranged, the abutment 52 abuts against the top end of the movable frame 31 of the movable locking component 30 below, and the seat plate 40 presses down the hanging ring block 334 of the movable locking component 30 below to insert the first brake block 332 into the inter-tooth groove of the rack 22.
[0041] It can be understood that when the upper movable locking component 30 moves upward, the seat plate 40 is pulled upward and folded on the lower movable locking component 30, and the lower movable locking component 30 moves upward together with the upper movable locking component 30. When it is necessary to take a rest, the lower movable locking component 30 is moved closer to the upper movable locking component 30 until the top of the movable frame 31 of the lower movable locking component 30 abuts against the abutment 52, and the seat plate 40 will be opened from the lower movable locking component 30 and be arranged horizontally. The seat plate 40 presses down the hanging ring block 334 of the lower movable locking component 30 so that its first brake block 332 is inserted into the inter-tooth groove of the rack 22. The maintenance personnel sit on the seat plate 40, and the lower movable locking component 30 remains locked on the I-shaped guide rail 21, which has good safety performance.
[0042] In some embodiments, reference Fig. 9 An alarm 60 is also provided on the moving frame 31 of the moving locking component 30 .
[0043] In some embodiments, reference Fig. 9 A lighting lamp 70 is also provided on the moving frame 31 of the moving locking component 30 .
[0044] At present, a guard cage is usually set on the ladder to prevent falling, which is costly and inconvenient for maintenance personnel to climb with tools on their backs. The novel rack-type ladder of the present application has high anti-fall performance and does not need to be provided with a guard cage.
[0045] At present, staircase platforms are usually set up for people to stop and rest during climbing, which is costly and may damage the original structure of the building, affecting the structural safety. The new rack-type ladder of the present application can be equipped with a seat plate 40 on the movable locking component 30, and the movable locking component 30 can be effectively locked on the ladder, so that people can sit on the seat plate 40 to rest at any time and safely, and there is no need to set up a staircase platform.
[0046] The novel rack-type ladder of the present application can be provided with an alarm 60 for alarming, and a lighting lamp 70 for assisting lighting.
[0047] The present application also provides a conveying device, including the novel rack-type ladder, wherein a climbing drive mechanism and a locking drive mechanism are installed on the moving frame 31 of the moving locking component 30, the climbing drive mechanism is used to drive the two rubber wheels 321 of the rubber wheel group to rotate in opposite directions, and the locking drive mechanism is used to drive the first rotating shaft 331 to rotate.
[0048] The conveying device of the present application utilizes the novel rack-type ladder to fix the articles to be conveyed on the mobile rack, and drives the two rubber wheels of the rubber wheel group to rotate in opposite directions through the climbing drive mechanism so that the mobile rack automatically moves along the I-shaped guide rail, and drives the first rotating shaft to rotate through the locking drive mechanism to lock and unlock the emergency lock, thereby realizing the conveying of the articles.
[0049] The climbing drive mechanism and the locking drive mechanism are remotely controlled by a remote control electric mechanism.
[0050] The object conveyed by the conveying device is a camera, which can realize an inspection function.
[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0052] The above-described embodiments only express several implementation methods of the present application and should not be construed as limiting the scope of the patent application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all fall within the scope of protection of the present application. Therefore, the scope of protection of the patent application shall be subject to the attached claims.
Claims
1. A new type of rack-type ladder, characterized in that: include: Ladder body; A rack component, comprising an I-shaped guide rail arranged on the ladder body and a rack arranged on the front side of the I-shaped guide rail; The movable locking component includes a movable frame, a rubber wheel group and an emergency locker arranged on the movable frame, the rubber wheel group includes two rubber wheels arranged in parallel and one-to-one on the guide grooves on both sides of the I-shaped guide rail, the central axis of the rubber wheel is connected to a centrifugal locker, and the emergency locker includes a first rotating shaft and a first brake block, a top connection block, and a hanging ring block fixedly connected to the first rotating shaft at a predetermined angle interval around the first rotating shaft, the first rotating shaft is rotatably installed on the movable frame, the hanging ring block is used to buckle with the hook of the safety belt, the hanging ring block is driven upward to make the top connection block press the movable frame, when the top connection block presses the movable frame, the first brake block is disengaged from the rack, the hanging ring block is driven downward to make the first brake block insert into the inter-tooth groove of the rack, when the first brake block inserts into the inter-tooth groove of the rack, the top connection block is disengaged from the movable frame.
2. The novel rack-type ladder according to claim 1 is characterized in that: A plurality of rubber wheel groups are arranged on the movable frame.
3. The novel rack-type ladder according to claim 1 is characterized in that: The movable locking component also includes a temporary lock, which includes a second rotating shaft and a second brake block and a pressing block fixedly connected to the second rotating shaft at predetermined angle intervals around the second rotating shaft. The second rotating shaft is rotatably mounted on the movable frame, and the second brake block is used to be inserted into the inter-tooth groove of the rack. The pressing block is connected to the movable frame through an elastic member. Under the action of the elastic member, the locker is maintained in a state where the second brake block is disengaged from the rack.
4. The novel rack-type ladder according to claim 1 is characterized in that: The novel rack-type ladder also includes a seat plate, which is mounted on the moving frame.
5. The novel rack-type ladder according to claim 4 is characterized in that: The new rack-type ladder is provided with two movable locking components, the two movable locking components are spaced apart up and down, two vertical connecting rods are provided between the two movable locking components, the two vertical connecting rods are symmetrically arranged on the left and right sides of the I-shaped guide rail, the upper ends of the vertical connecting rods are fixedly connected to the movable frame of the upper movable locking component, the lower ends are provided with abutments, and a movable connecting rod is hinged on the vertical connecting rod through a pin shaft; the seat plate is hinged on the movable frame of the movable locking component below, and the movable connecting rod is hinged on the seat plate, when the seat plate is horizontally arranged, the abutment abuts against the top end of the movable frame of the movable locking component below, and the seat plate presses down the hanging ring block of the movable locking component below to insert the first brake block into the inter-tooth groove of the rack.
6. The novel rack-type ladder according to claim 1 is characterized in that: The novel rack-type ladder also includes an alarm, which is arranged on the movable frame.
7. The novel rack-type ladder according to claim 1 is characterized in that: The novel rack-type ladder also includes a lighting lamp, which is arranged on the moving frame.
8. The novel rack-type ladder according to claim 1 is characterized in that: The ladder body extends in a vertical direction, and a plurality of pedal rods are evenly spaced and distributed on the ladder body in the extending direction.
9. A conveying device, characterized in that: It comprises a new rack-type ladder as described in any one of claims 1 to 8, wherein a climbing drive mechanism and a locking drive mechanism are installed on the moving frame of the moving locking component, the climbing drive mechanism is used to drive the two rubber wheels of the rubber wheel group to rotate in opposite directions, and the locking drive mechanism is used to drive the first rotating shaft to rotate.