Novel folding steel ladder

Abstract

The utility model belongs to the technical field of engineering machinery, and particularly relates to a folding steel ladder, which adopts a four-bar mechanism as a folding principle, and comprises a first step, a second step, a front bracket I, a front bracket II, a rear bracket, a locking bracket, a support I, a support II, a lock catch, an anti-loosening bolt, a fixing bolt, a plug pin I, a plug pin II, a support plate and a rib plate, the rear support and the support I are connected through anti-loosening bolts and rotate flexibly relative to each other, and the support I and the support II are fixedly connected with installed equipment through fixing bolts, so that the rear support and the front support I are in an unlocked state. According to the folding steel ladder, all parts of the steel ladder are connected through the anti-loosening bolts, connection, namely flexible rotation and reliable connection, of all the parts is guaranteed, the folding steel ladder is locked through the plug pins or the lock catches in the folding and unfolding limit state, use safety is guaranteed, operation is convenient in the use process, use is safe and reliable, and the folding steel ladder is suitable for popularization and application. Meanwhile, mounting and dismounting are convenient, and the working efficiency is effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, in particular to a folding steel ladder. Background Art

[0002] At present, construction machinery has been widely used in various construction fields. The working conditions of construction machinery are generally poor, and regular maintenance and overhaul are indispensable. The convenience of upper and lower maintenance platforms has attracted more and more attention. In order to facilitate construction at heights, steel ladders are generally used as one of the tools. However, there are still some problems in the use of steel ladders, including that general steel ladders are fixed at a fixed angle, cannot be disassembled, occupy a large space, and affect the convenience of construction machinery during operation. Therefore, the utility model proposes a new type of folding steel ladder. Summary of the invention

[0003] The purpose of the utility model is to provide a foldable steel ladder for construction machinery. The various components of the steel ladder are connected and fixed by bolts, latches and locks. The steel ladder can be folded when the equipment is running, unfolded for inspection, and disassembled for equipment maintenance. The steel ladder not only meets the functional requirements but also has an aesthetic appearance, so as to solve the problems raised in the above-mentioned background technology.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A novel folding steel ladder adopts a four-bar linkage mechanism for its folding principle, including a first step, a second step, a front bracket I, a front bracket II, a rear bracket, a locking bracket, a support I, a support II, a lock, an anti-loosening bolt, a fixing bolt, a latch I, a latch II, a support plate I and a rib plate. The rear bracket and the support I are both connected by anti-loosening bolts and can rotate relative to each other. The support I and the support II are connected and fixed to the installed equipment by fixing bolts; the latch I is installed on the rear bracket, and the latch I cooperates with the pin hole on the front bracket I to keep the rear bracket and the front bracket I in an unlocked state.

[0006] A preferred technical solution is that the latch pin II is installed on the locking bracket, a fixing plate is installed on the first step, and the latch pin II cooperates with the pin hole on the fixing plate to lock the first step.

[0007] A preferred technical solution is that the rear bracket is made of steel plates that are stamped, bent and then welded, and is provided with a mounting hole for an anti-loosening bolt, a through hole for a latch pin I, and locking and unlocking limit slots for the latch pin I.

[0008] A preferred technical solution is that the support plate I is made of steel plate, which is bent and welded to the rib plate. A positioning pin is installed on the support plate I. The support plate I has a mounting hole for an anti-loosening bolt, a pin hole for the plug I and a mounting hole for the positioning pin. The positioning pin is installed on the support plate I through the mounting hole and then welded firmly.

[0009] A preferred technical solution is that a support plate II is welded on the rib plate, the support plate II is made of steel plate, and a mounting hole for anti-loosening bolts is opened on the support plate II.

[0010] A preferred technical solution is that the support II is connected to a C-shaped steel through an anti-loosening bolt, a fixing plate and a support III are welded to the middle of the C-shaped steel, an installation hole for an anti-loosening bolt is opened on the fixing plate for installing a lock, and an ear plate is welded to the lower part of the C-shaped steel for installing a second step.

[0011] A preferred technical solution is that the support III is provided with mounting holes for anti-loosening bolts for mounting the front bracket I and the front bracket II.

[0012] A preferred technical solution is that a handrail is welded on the C-shaped steel.

[0013] A preferred technical solution is that a step is connected between the two C-shaped steels, and the step is made of bent steel plates and punched to play an anti-slip role.

[0014] The beneficial effects of the utility model are:

[0015] 1. Anti-loosening bolts are used to connect the various parts of the steel ladder of the utility model, which ensures that the connection between the various parts is flexible in rotation and reliable. The folding steel ladder is locked by a latch or a lock when it is in the extreme state of folding and unfolding to ensure safe use. The folding steel ladder is connected to the installed equipment by fixed bolts, which is convenient for installation and disassembly. During use, the structure is light, the operation is convenient, and it is safe and reliable to use. It has a beautiful appearance and occupies a small space. At the same time, it is easy to install and disassemble, which effectively improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 The utility model is a structural diagram of a novel folding steel ladder.

[0018] Figure 2 yes Figure 1 A-direction view.

[0019] Figure 3 yes Figure 1 B view.

[0020] Figure 4The utility model is a schematic diagram of the folding and stowing process of a novel folding steel ladder.

[0021] Figure 5 The utility model is a schematic diagram of a novel foldable steel ladder after being folded and stowed.

[0022] Figure 6 yes Figure 5 C-direction view.

[0023] Figure 7 yes Figure 5 DD cross-sectional view.

[0024] Figure 8 yes Figure 5 EE cross-sectional view.

[0025] Fig. 9 It is a schematic diagram showing that the latch Ⅰ (12) on the rear bracket (5) is in the locked position.

[0026] Fig.10 yes Fig. 9 F direction view.

[0027] Fig.11 yes Fig.10 G-direction view.

[0028] Fig.12 It is a schematic diagram showing that the latch Ⅰ (12) on the rear bracket (5) is in the unlocked position.

[0029] Fig.13 This is a structural diagram of the front bracket I (3).

[0030] Fig.14 yes Fig.13 H-direction view.

[0031] Fig.15 This is a structural diagram of the front bracket II (4).

[0032] Fig.16 yes Fig.15 K-direction view.

[0033] Fig.17 It is a structural diagram of a ladder (1).

[0034] Fig.18 yes Fig.17 L-direction view.

[0035] Fig.19 It is the structural diagram of the second step (2).

[0036] Fig. 20 yes Fig.19 MM cross-sectional view.

[0037] In the figure, 1 is the first step; 2 is the second step; 3 is the front bracket I; 4 is the front bracket II; 5 is the rear bracket; 6 is the locking bracket; 7 is the support I; 8 is the support II; 9 is the lock; 10 is the anti-loosening bolt; 11 is the fixing bolt; 12 is the latch I; 13 is the latch II; 14 is the support plate I, 15 is the rib plate; 16 is the positioning pin; 17 is the support plate II; 18 is the handrail; 19 is the C-shaped steel; 20 is the fixing plate; 21 is the support III; 22 is the ear plate; 23 is the step. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, 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" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0040] 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 technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" 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 it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements.

[0041] For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Example:

[0043] ①In Figure 1 , Figure 2 and Figure 3In the figure, the first step 1 and the second step 2, the second step 2 and the support II8, the second step 2 and the front bracket I3 and the front bracket II4, the rear bracket 5 and the front bracket I3 and the front bracket II4, and the rear bracket 5 and the support I7 are all connected by anti-loosening bolts 10, and they can rotate flexibly with each other. The support I7 and the support II8 are connected and fixed to the installed equipment by fixing bolts 11. The folding steel ladder is in the unfolded state, that is, the use state. At this time, the lock buckle 9 is in the unlocked state, and the pin I12 on the rear bracket 5 is inserted into the pin hole of the front bracket I3, so that the rear bracket 5 and the front bracket I3 are in the locked state, and the pin II13 on the locking bracket 6 is in the unlocked state.

[0044] ②In Figure 4 In the process, the latch pin Ⅰ12 on the rear bracket 5 is pulled out of the pin hole of the front bracket Ⅰ3, so that the rear bracket 5 and the front bracket Ⅰ3 are in an unlocked state, the second step 2 is pulled upward, and the connection between the front bracket Ⅰ3, the front bracket Ⅱ4 and the rear bracket 5 is lifted upward and the first step 1 is pushed at the same time to fold the folding steel ladder.

[0045] ③In Figure 5 , Figure 6 , Figure 7 and Figure 8 In the embodiment, the folding steel ladder is in the folded and stowed state. At this time, the lock buckle 9 is locked into the second step 2 to prevent the second step 2 from rotating around the anti-loosening bolt 10 and falling. The latch pin II 13 on the locking bracket 6 is inserted into the pin hole of the fixing plate 20 on the first step 1 to lock the first step 1. At this time, the folding steel ladder is completely fixed after being stowed.

[0046] ④In Fig. 9 , Fig.10 and Fig.11 In the embodiment, the rear bracket 5 is made of steel plate after stamping, bending and welding, and has a mounting hole for the anti-loosening bolt 10, a through hole for the latch Ⅰ 12, and a locking and unlocking limit slot for the latch Ⅰ 12. At this time, the latch Ⅰ 12 is in a locked position.

[0047] ⑤In Fig.12 In the embodiment, the latch Ⅰ12 on the rear bracket 5 is in the unlocked position.

[0048] ⑥In Fig.13 and Fig.14 In the embodiment, the support plate Ⅰ14 is made of steel plate, which is welded with the rib plate 15 after being bent.

[0049] 14 has a mounting hole for the anti-loosening bolt 10, a pin hole for the latch pin 12 and a mounting hole for the positioning pin 16. The positioning pin 16 is firmly welded to the support plate 14 after installation. When the folding steel ladder is unfolded, when the positioning pin 16 is stuck to the rear bracket 5, the folding steel ladder is unfolded to the limit position. At this time, the latch pin 12 is inserted into the pin hole of the front bracket 13 to lock the folding steel ladder at the limit unfolding position.

[0050] ⑦In Fig.15 and Fig.16 In the figure, the support plate II 17 is made of steel plate, which is welded to the rib plate 15 after being bent, and the support plate II 17 has a mounting hole for the anti-loosening bolt 10.

[0051] ⑧In Fig.17 and Fig.18 In the figure, the handrail 18 is made of steel pipe and welded to the C-shaped steel 19. The upper part of the C-shaped steel 19 has a mounting hole, which can be installed on the support II8 through the anti-loosening bolt 10. The middle part of the C-shaped steel 19 is welded with a fixing plate 20 and a support III 21. The fixing plate 20 has a mounting hole for the anti-loosening bolt 10 for installing the lock buckle 9, and a pin hole for the plug I 13 is reserved for the insertion and locking of the plug I 13. The support III 21 has a mounting hole for the anti-loosening bolt 10 for installing the front bracket I 3 and the front bracket II 4. The lower part of the C-shaped steel 19 is welded with an ear plate 22 for installing the second step 2.

[0052] ⑨In Fig.19 and Fig. 20 In the figure, the step 23 is made of bent steel plate and punched to prevent slipping.

[0053] When the folding steel ladder is unfolded, the lock buckle 9 is unlocked, the second step 2 is flipped downward to the extreme position, the latch pin Ⅱ13 is unlocked, the first step 1 is pulled to the extreme position, the latch pin Ⅰ12 is inserted into the pin hole of the front bracket Ⅰ3, and the rear bracket 5 and the front bracket Ⅰ3 are locked. At this time, the folding steel ladder can be used normally; when the folding steel ladder is folded, the latch pin Ⅰ12 is pulled out of the pin hole of the front bracket Ⅰ3, the rear bracket 5 and the front bracket Ⅰ3 are unlocked, the second step 2 is pulled upward, the lock buckle 9 is inserted into the second step 2 for locking, the connection between the front bracket Ⅰ3, the front bracket Ⅱ4 and the rear bracket 5 is lifted upward, the first step 1 is pushed to the extreme position, the latch pin Ⅱ13 is inserted into the pin hole of the fixing plate 20 on the first step 1, and the first step 1 is locked. At this time, the folding steel ladder is completely fixed.

Claims

1. A new type of folding steel ladder, characterized by: The invention comprises a first step (1), a second step (2), a front bracket I (3), a front bracket II (4), a rear bracket (5), a locking bracket (6), a support I (7), a support II (8), a lock buckle (9), an anti-loosening bolt (10), a fixing bolt (11), a latch I (12), a latch II (13), a support plate I (14) and a rib plate (15); the rear bracket (5) and the support I (7) are both connected by anti-loosening bolts (10) and can rotate relative to each other; the support I (7) and the support II (8) are connected and fixed to the installed equipment by fixing bolts (11); the latch I (12) is installed on the rear bracket (5); the latch I (12) cooperates with the pin hole on the front bracket I (3) so that the rear bracket (5) and the front bracket I (3) are in an unlocked state.

2. The novel folding steel ladder according to claim 1 is characterized in that: The latch pin II (13) is mounted on the locking bracket (6), a fixing plate (20) is mounted on the first step (1), and the latch pin II (13) cooperates with a pin hole on the fixing plate (20) to lock the first step (1).

3. The new folding steel ladder according to claim 1 is characterized by: The rear bracket (5) is made of steel plate that is stamped, bent and then welded, and is provided with a mounting hole for an anti-loosening bolt (10), a through hole for a latch pin I (12), and a locking and unlocking limit slot for the latch pin I (12).

4. The novel folding steel ladder according to claim 1 is characterized in that: The support plate Ⅰ (14) is made of steel plate The support plate (14) is welded with the rib plate (15) after being bent. A positioning pin (16) is installed on the support plate (14). The support plate (14) has a mounting hole for the anti-loosening bolt (10), a pin hole for the plug pin (12) and a mounting hole for the positioning pin (16). The positioning pin (16) is installed with the support plate (14) through the mounting hole and then welded firmly.

5. The novel folding steel ladder according to claim 1 is characterized in that: A support plate II (17) is welded to the rib plate (15), the support plate II (17) is made of a steel plate, and a mounting hole for an anti-loosening bolt (10) is provided on the support plate II (17).

6. The novel folding steel ladder according to claim 1 is characterized in that: The support II (8) is connected to a C-shaped steel (19) via an anti-loosening bolt (10); a fixing plate (20) and a support III (21) are welded to the middle of the C-shaped steel (19); a mounting hole for the anti-loosening bolt (10) is provided on the fixing plate (20) for mounting a lock buckle (9); and an ear plate (22) is welded to the lower part of the C-shaped steel (19) for mounting the second step (2).

7. The novel folding steel ladder according to claim 6 is characterized in that: The support III (21) is provided with a mounting hole for a locking bolt (10) for mounting the front support I (3) and the front support II (4).

8. The novel folding steel ladder according to claim 6 is characterized by: A handrail (18) is welded onto the C-shaped steel (19).

9. The novel folding steel ladder according to claim 6 is characterized by: A step (23) is connected between the two C-shaped steels (19), and the step (23) is made of a bent steel plate and punched to prevent slipping.

Images