Crawling ladder manufacturing and positioning tool

Abstract

The utility model relates to the technical field of machine manufacturing, and discloses a ladder manufacturing positioning tool which comprises a supporting frame body and a plurality of connecting pieces, at least one pair of first positioning plates distributed at intervals in the first direction is arranged at the top of the supporting frame body, a first positioning hole is formed in each first positioning plate, and a second positioning hole is formed in each first positioning plate. A plurality of pairs of second positioning plates distributed at intervals in the first direction are arranged on one side of the supporting frame body in the height direction at intervals, each second positioning plate is provided with a second positioning hole, and the first direction is perpendicular to the height direction of the supporting frame body. Every two connecting plates located on different main frames can correspond to at least one pair of first positioning plates or at least one pair of second positioning plates, and the first positioning holes and the second positioning holes are used for assisting in positioning the positions of through holes to be formed in the corresponding connecting plates. Each connecting piece is detachably connected with a through hole formed in the connecting plate and the first positioning hole or the second positioning hole corresponding to the through hole. And the ladder stand manufacturing yield is high, and the universality is good.

Description

A ladder manufacturing positioning fixture Technical Field

[0001] This utility model relates to the field of mechanical manufacturing technology, and in particular to a positioning fixture for ladder manufacturing. Background Technology

[0002] Tanker trucks and similar vehicles are typically equipped with ladders for easy access by operators. Ladders mainly consist of uprights and crossbars, usually made of metal or alloy materials to ensure sufficient strength and stability. During the manufacturing process, the precision of the connections between these components plays a crucial role in the overall safety and performance of the ladder. Traditional ladder manufacturing processes have many drawbacks. Previously, welding crossbars and sidebars relied heavily on manual positioning. Due to the large number of crossbars, each welding operation required repeated manual adjustments, a process that was extremely inefficient. Furthermore, manual positioning made it difficult to guarantee height accuracy, easily leading to crossbar position deviations and preventing the crossbars from being level. When workers climb such ladders with deviations, stability and safety are compromised, significantly increasing the risk of accidents. Moreover, existing tooling often fails to meet the manufacturing needs of ladders of different sizes and specifications, exhibiting poor versatility. Summary of the Invention

[0003] Based on the above, the purpose of this utility model is to provide a positioning fixture for ladder manufacturing, which can assist in the manufacturing of ladders, resulting in a higher yield rate and better versatility in ladder manufacturing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A ladder manufacturing positioning fixture, the ladder includes two main frames and several treads to be welded between the two main frames, each main frame is fixed with at least two connecting plates, and the ladder manufacturing positioning fixture includes a support frame and multiple connecting parts.

[0006] The top of the support frame is provided with at least one pair of first positioning plates spaced apart along a first direction, each first positioning plate having a first positioning hole. A side portion of the support frame is provided with multiple pairs of second positioning plates spaced apart along the first direction along the height direction, each second positioning plate having a second positioning hole. The first direction is perpendicular to the height direction of the support frame.

[0007] Each pair of connecting plates located on different main frames can correspond to at least one pair of first positioning plates or at least one pair of second positioning plates. The first positioning hole and the second positioning hole are used to assist in positioning the position of the through hole to be opened on the corresponding connecting plate.

[0008] Each of the connectors is detachably connected to a through hole opened on the connecting plate and the first positioning hole or the corresponding second positioning hole of the through hole.

[0009] As a preferred embodiment of a ladder manufacturing positioning fixture, the connecting component includes a nut and a bolt, wherein the bolt passes through the corresponding through hole and the first positioning hole or the corresponding through hole and the second positioning hole and is threadedly connected to the nut.

[0010] As a preferred embodiment of a positioning fixture for ladder manufacturing, the support frame includes two opposing legs and a top plate disposed between the two legs. At least one pair of first positioning plates are disposed on the top of the top plate, and multiple second positioning plates are disposed on the side of each leg.

[0011] As a preferred embodiment of a ladder manufacturing positioning fixture, the leg frame includes a base plate and a gantry frame body vertically connected to the base plate. The top plate is fixed on the crossbeams of the two gantry frames, and a second positioning plate is provided on one side of each gantry frame body away from the other vertical beam.

[0012] As a preferred embodiment of a ladder manufacturing positioning fixture, the support frame further includes a reinforcing back plate, which is connected to the same side vertical beam of the two gantry frames, and the second positioning plate is fixed to the reinforcing back plate.

[0013] As a preferred solution for positioning fixtures in ladder manufacturing, the reinforcing back plate is detachably connected to the gantry frame.

[0014] As a preferred embodiment of a ladder manufacturing positioning fixture, each first positioning plate is provided with a plurality of first positioning holes spaced apart along the height direction.

[0015] As a preferred embodiment of a ladder manufacturing positioning fixture, each of the first positioning holes is a strip-shaped hole whose length extends along the height direction.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model provides a positioning fixture for ladder manufacturing. By supporting the main frame, the two connecting plates on the main frame correspond to at least one first positioning plate and one second positioning plate, respectively. Corresponding to the first and second positioning holes, through holes can be precisely opened on the connecting plates, improving the accuracy of the subsequent connection between the main frame and the support frame, and avoiding connection failure due to blindly opening through holes. Furthermore, by setting multiple pairs of second positioning plates along the height direction, the connecting plates can be smoothly aligned with one or more of the second positioning plates, adapting to ladders of different heights and offering good versatility. After opening the through holes, the corresponding through holes are connected to the first or second positioning holes via connectors, fixing the main frame to the support frame. This facilitates welding the treadle between the two main frames. The fixed position of the main frame during welding improves welding yield and eliminates the need for additional manpower to support the main frame, saving labor. After welding, the connectors are removed to obtain the completed ladder. The first and second positioning holes on the main frame also facilitate the subsequent connection of the ladder to the vehicle body, eliminating the need for additional mounting holes and saving manufacturing steps. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0019] Figure 1 is a structural schematic diagram of the ladder manufacturing positioning fixture provided in an embodiment of this utility model;

[0020] Figure 2 is a structural schematic diagram of the ladder and ladder manufacturing positioning fixture provided in an embodiment of this utility model.

[0021] In the picture:

[0022] 100. Ladder; 101. Main frame; 102. Steps; 103. Connecting plate; 1030. Through hole;

[0023] 1. Support frame; 11. Legs; 111. Base plate; 112. Gantry frame; 12. Top plate; 2. Connecting parts; 3. First positioning plate; 30. First positioning hole; 4. Second positioning plate; 40. Second positioning hole. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0028] As shown in Figures 1 and 2, this embodiment provides a ladder manufacturing positioning fixture. The ladder 100 includes two main frames 101 and a plurality of steps 102 to be welded between the two main frames 101. At least two connecting plates 103 are fixed on each main frame 101. The ladder manufacturing positioning fixture includes a support frame 1 and a plurality of connecting parts 2. The top of the support frame 1 is provided with at least a pair of first positioning plates 3 spaced apart along a first direction. Each first positioning plate 3 is provided with a first positioning hole 30. A plurality of pairs of first positioning plates 3 spaced apart along the first direction are provided on one side of the support frame 1 along the height direction. Two positioning plates 4, each with a second positioning hole 40, the first direction being perpendicular to the height direction of the support frame 1. Each pair of connecting plates 103 located on different main frames 101 can correspond to at least one pair of first positioning plates 3 or at least one pair of second positioning plates 4. The first positioning hole 30 and the second positioning hole 40 are used to assist in positioning the position of the through hole 1030 to be opened on the corresponding connecting plate 103. Each connector 2 can detachably connect a through hole 1030 opened on the connecting plate 103 and the first positioning hole 30 or the corresponding second positioning hole 40 corresponding to the through hole 1030. By supporting the main frame 101, the two connecting plates 103 on the main frame 101 correspond to at least one first positioning plate 3 and one second positioning plate 4, respectively, corresponding to the first positioning hole 30 and the second positioning hole 40. This allows for precise drilling of through holes 1030 on the connecting plates 103, improving the accuracy of the subsequent connection between the main frame 101 and the support frame 1, and preventing connection failure due to blind drilling of through holes 1030. Furthermore, by setting multiple pairs of second positioning plates 4 along the height direction, the connecting plates 103 can be smoothly aligned with one or more of the second positioning plates 4, adapting to ladders 100 of different heights. Each second positioning plate 4 has one second positioning hole 40, or multiple second positioning holes 40 are spaced apart along the height direction. For example, on a shorter main frame 101, the connecting plates 103 can correspond to the second positioning plates 4 located at higher positions, while on a longer main frame 101, the connecting plates 103... The 03 corresponds to the second positioning plate 4 located at a lower position. The multiple second positioning holes 40 on each second positioning plate 4 also facilitate the correspondence of the connecting plate 103. This ladder manufacturing positioning fixture has a wide range of applications and good practicality and versatility. After opening the through hole 1030, the corresponding through hole 1030 and the first positioning hole 30 or the through hole 1030 and the second positioning hole 40 are connected by the connector 2, so that the main frame 101 is fixed on the support frame 1, which facilitates the welding of the step 102 between the two main frames 101. During the welding process, the position of the main frame 101 is fixed, which helps to improve the welding yield and eliminates the need for additional manpower to hold the main frame 101, saving manpower. After welding is completed, the connector 2 is removed to obtain the completed ladder 100. The first positioning hole 30 and the second positioning hole 40 on the main frame 101 also facilitate the subsequent connection of the ladder 100 to the vehicle body without the need to open additional installation holes, saving manufacturing steps.

[0029] Optionally, the connector 2 includes a bolt and a nut. The bolt is screwed into the corresponding through hole 1030 and the first positioning hole 30 and then connected to the nut, or screwed into the corresponding through hole 1030 and the second positioning hole 40 and then connected to the nut.

[0030] Specifically, the support frame 1 includes two opposing leg frames 11 and a top plate 12 disposed between the two leg frames 11. The top of the top plate 12 is provided with at least one pair of first positioning plates 3, and the side of each leg frame 11 is provided with multiple second positioning plates 4. The two leg frames 11 correspond to the two main frames 101 respectively. The support frame 1 with the above structure is simple and has good structural stability.

[0031] More specifically, the leg frame 11 includes a base plate 111 and gantry frame bodies 112 vertically connected to the base plate 111. A top plate 12 is fixed to the crossbeams of the two gantry frame bodies 112. A second positioning plate 4 is provided on the side of one vertical beam of each gantry frame body 112 opposite to the other vertical beam. The base plate 111 and the gantry frame structure effectively improve the structural stability of the leg frame 11, i.e., increase its load-bearing capacity, and prevent swaying or tipping during the welding of the footplate 102. Of course, in other embodiments, the leg frame 11 can also be other structures, such as a single piece of plate, depending on actual needs.

[0032] Preferably, the support frame 1 further includes a reinforcing back plate, which is connected to the vertical beam on the same side of the two gantry frames 112, and the second positioning plate 4 is fixed to the reinforcing back plate. The reinforcing back plate can enhance the overall structural strength of the support frame 1, which is beneficial to improving the load-bearing capacity and making the support frame 1 more stable and reliable when welding the treadle 102.

[0033] More preferably, the back plate is detachably connected to the gantry frame 112, which facilitates the replacement of damaged or different sizes or models of the second positioning plate 4.

[0034] Furthermore, each first positioning plate 3 is provided with multiple first positioning holes 30 spaced apart along the height direction, which is beneficial for accommodating connecting plates 103 of different sizes and can also connect multiple connecting parts 2 simultaneously to improve the connection stability between the main frame 101 and the support frame 1. For example, the main frame 101 includes a first section, a second section and a third section arranged vertically in sequence. The first section and the third section are arranged opposite to each other. The length of the third section is shorter than the length of the first section. A connecting plate 103 is provided on the first section, which can correspond to any one or more second positioning plates 4. A connecting plate 103 is provided near the end of the third section, corresponding to the first positioning plate 3 at the top of the support frame 1.

[0035] Preferably, each first positioning hole 30 is a strip-shaped hole whose length extends along the height direction. The strip-shaped hole configuration allows for a wide range of possible positions for the opening 1030 of the connecting plate 103.

[0036] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A positioning fixture for manufacturing a ladder, the ladder comprising two main frames and a plurality of steps to be welded between the two main frames, wherein at least two connecting plates are fixed on each main frame, characterized in that, The ladder manufacturing positioning fixture includes a support frame and multiple connectors. The top of the support frame is provided with at least one pair of first positioning plates spaced apart along a first direction, each first positioning plate having a first positioning hole. One side of the support frame is provided with multiple pairs of second positioning plates spaced apart along the first direction, each second positioning plate having a second positioning hole. The first direction is perpendicular to the height direction of the support frame. Every two connectors located on different main frames can correspond to at least one pair of first positioning plates or at least one pair of second positioning plates. The first positioning holes and second positioning holes are used to assist in positioning the positions of through holes to be opened on the corresponding connectors. Each connector is detachably connected to one through hole opened on the connector and the corresponding first positioning hole or corresponding second positioning hole.

2. The ladder manufacturing positioning fixture according to claim 1, characterized in that, The connector includes a nut and a bolt, the bolt being threaded to the nut after passing through the corresponding through hole and the first positioning hole or the corresponding through hole and the second positioning hole.

3. The ladder manufacturing positioning fixture according to claim 1, characterized in that, The support frame includes two opposing legs and a top plate disposed between the two legs. At least one pair of first positioning plates are disposed on the top of the top plate, and multiple second positioning plates are disposed on the side of each leg.

4. The ladder manufacturing positioning fixture according to claim 3, characterized in that, The leg frame includes a base plate and a gantry frame body vertically connected to the base plate. The top plate is fixed to the crossbeams of the two gantry frames. A second positioning plate is provided on one side of each gantry frame body opposite to the other vertical beam.

5. The ladder manufacturing positioning fixture according to claim 4, characterized in that, The support frame also includes a reinforcing back plate, which is connected to the same side vertical beam of the two gantry frames, and the second positioning plate is fixed to the reinforcing back plate.

6. The ladder manufacturing positioning fixture according to claim 5, characterized in that, The reinforcing back plate is detachably connected to the gantry frame.

7. The ladder manufacturing positioning fixture according to claim 1, characterized in that, Each of the first positioning plates has a plurality of first positioning holes spaced apart along the height direction.

8. The ladder manufacturing positioning fixture according to claim 7, characterized in that, Each of the first positioning holes is a strip-shaped hole whose length extends along the height direction.

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