A portal frame of a wood board bending apparatus and a conveying mechanism using the same

Abstract

This utility model provides a gantry frame for a wood board bending machine and a conveying mechanism using this gantry frame, belonging to the field of wood board production technology. It solves the technical problems of existing gantry frames, such as complex structure and inability to adapt to conveying boards of different widths. This gantry frame includes a vertical support section, a horizontal connecting section, and a vertical suspension section. One end of the horizontal connecting section is fixedly connected to the upper end of the vertical support section, and the other end is fixedly connected to the upper end of the vertical suspension section. A mounting plate is fixedly connected to the lower end of the vertical suspension section and its side wall facing the vertical support section. The mounting plate is vertically arranged, and the height of the vertical suspension section is less than the height of the vertical support section. The mounting plate is positioned opposite to the middle of the vertical support section. This conveying mechanism uses the aforementioned gantry frame. This utility model has the advantages of simple structure, adaptability to conveying boards of different widths, and convenient adjustment.

Description

Technical Field

[0001] This utility model belongs to the field of board production technology, specifically referring to a gantry frame for a board bending equipment and a conveying mechanism using the gantry frame. Background Technology

[0002] Wood board bending equipment is used to bend and shape wood boards. It is a key piece of equipment for achieving complex curved surface shapes. The board conveying system is crucial in bending equipment, as it is responsible for smoothly and continuously feeding the wood boards to be processed into and out of each workstation.

[0003] Currently, most common conveying systems employ roller conveying, where pairs of rollers (upper and lower rollers) positioned above and below the sheet material clamp and drive the sheet forward. To support and secure these upper rollers, a gantry structure is commonly used. Existing gantry structures are typically rigid frames spanning the entire width of the equipment, with their crossbeams directly bearing and securing the mounting shafts or bearing seats of the upper rollers. In other words, the upper rollers and their supporting structure are rigidly connected and fixed beneath the crossbeams of the gantry.

[0004] This structure, which rigidly fixes the upper roller to the gantry beam, has the following main problems in practice:

[0005] 1. Structural complexity and high cost: The gantry frame itself needs to have sufficient rigidity and strength to withstand the pressure, vibration and possible impact of the upper rollers and the plate, which makes its structure usually large and heavy, with a large amount of material used and high manufacturing cost.

[0006] 2. Space Occupancy and Interference: The gantry beam spans the width of the equipment and is spaced along the direction of equipment movement. The processing width of the sheet metal is limited by the length of the gantry beam. Due to cost considerations such as factory area and space utilization, the length of the beam is mainly determined by the width of the sheet metal produced most frequently, which results in the inability to process sheet metal with larger widths.

[0007] 3. Difficult to adjust: Since there are columns at both ends of the gantry, if it is necessary to produce wider plates, the gantry needs to be replaced with one with a longer crossbeam. Not only does it require replacing all the gantry frames, but it also requires reinstalling the rollers and other components fixed to the gantry frames, and adjusting the precision of each component to meet production requirements. Utility Model Content

[0008] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a gantry frame with a simple structure, which can adapt to the conveying of plates of different widths and is easy to adjust, as well as a conveying mechanism using the gantry frame.

[0009] The objective of this utility model can be achieved through the following technical solutions:

[0010] A gantry frame, characterized in that it includes a vertical support section, a horizontal connecting section, and a vertical suspension section. One end of the horizontal connecting section is fixedly connected to the upper end of the vertical support section, and the other end is fixedly connected to the upper end of the vertical suspension section. A mounting plate is fixedly connected to the lower end of the vertical suspension section and the side wall facing the vertical support section. The mounting plate is vertically arranged. The height of the vertical suspension section is less than the height of the vertical support section. The mounting plate is arranged opposite to the middle of the vertical support section.

[0011] This gantry crane uses a suspended vertical suspension section to mount the upper roller assembly, replacing the traditional integral rigid beam structure that spans the width of the equipment. This significantly simplifies the gantry crane body, allowing for a lighter and more compact design, effectively reducing material usage and manufacturing costs. This invention eliminates the rigid beam spanning the width of the equipment; the gantry crane only needs to be installed on one side of the equipment (usually the feeding side or the operating side). This eliminates the column on the other side of the equipment that restricts the width of the sheet metal, fundamentally eliminating the physical limitation of the gantry crane on the width of the sheet metal being processed. This allows the equipment to easily adapt to the processing needs of sheet metal of different widths (especially larger widths) without requiring a complete replacement of the gantry crane structure due to changes in sheet metal width.

[0012] In the aforementioned gantry frame, the width W of the lower part of the vertical support gradually increases from top to bottom.

[0013] The tapered design of the support section, wider at the bottom and narrower at the top, significantly lowers the overall center of gravity of the equipment, greatly improving the gantry's ability to resist overturning moments (mainly from the lateral forces applied by the upper roller assembly or the eccentric loads during plate conveying), ensuring more stable and reliable equipment operation. Furthermore, this structure conforms to the equal strength design concept, providing the maximum cross-sectional width and moment of inertia at the root of the support section (where it connects to the base) where the stress is greatest, effectively resisting bending moments and shear forces. This ensures structural rigidity and strength while avoiding redundant material waste, achieving a balance between lightweight and high rigidity and strength.

[0014] In the aforementioned gantry frame, the connection between the horizontal connecting part and the vertical support part, as well as the connection between the horizontal connecting part and the vertical suspension part, both have inclined connecting parts.

[0015] The inclined connection section achieves a smooth transition of structural cross-section changes, effectively avoiding stress concentration at right-angle connections, significantly reducing the risk of fatigue failure of key connection parts under long-term alternating loads (such as upper roller vibration and plate impact), and greatly improving the overall structural durability and service life of the gantry. The inclined structure provides a larger connection area and a better force transmission path, further strengthening the rigidity and strength of the connection nodes between the vertical support section, the horizontal connection section, and the vertical suspension section, ensuring that the entire gantry deforms less and runs more smoothly under stress.

[0016] In the aforementioned gantry frame, the vertical support section, the horizontal connecting section, the vertical suspension section, and the two diagonal connecting sections each include a front side plate, a rear side plate, and a connecting plate. The connecting plate is disposed between the front side plate and the rear side plate and is fixedly connected to the outer edges of both the front side plate and the rear side plate. All front side plates are formed as a single-piece structure, all rear side plates are formed as a single-piece structure, and all connecting plates are formed as a single-piece structure. A plurality of reinforcing plates are disposed between the front side plate and the rear side plate, and the two ends of the reinforcing plates are fixedly connected to the front side plate and the rear side plate, respectively.

[0017] The hollow box-type or plate structure, consisting of front side plates, rear side plates, and connecting plates, with internal reinforcing plates, is an extremely efficient structural form. This design minimizes the structure's self-weight and optimizes material utilization efficiency while ensuring sufficient overall and local rigidity and strength. Each component (front side plate, rear side plate, and connecting plate) is formed as a single piece (e.g., sheet metal welding, casting), greatly reducing the number of parts and complex assembly processes. This not only lowers manufacturing costs but also helps ensure the geometric accuracy of each component and the overall assembly quality, ensuring the stability of the gantry frame's performance. The internal reinforcing plates effectively suppress the risk of buckling deformation of thin-walled plates under compression or bending, further enhancing the overall stability and load-bearing capacity of the structure.

[0018] In the aforementioned gantry frame, a base plate is included. The lower ends of the front side plate, rear side plate, and connecting plate of the vertical support are all welded and fixed to the base plate. The base plate is provided with a plurality of bottom mounting holes for fixing the gantry frame.

[0019] The base plate structure provides a rigid and flat installation reference surface for the entire gantry. Through the multiple bottom mounting holes on the base plate, the gantry can be conveniently, quickly and accurately positioned and firmly fixed to the equipment base, which greatly simplifies the on-site installation and commissioning process and ensures installation accuracy and structural stability.

[0020] In the aforementioned gantry frame, both the base plate and the reinforcing plate are provided with wire-passing holes.

[0021] The above-mentioned cable hole design facilitates the installation of wires, pipes, etc., and makes the cable routing more aesthetically pleasing without affecting the overall structural strength of the gantry frame, while avoiding interference with the upper roller assembly and other bending mechanisms.

[0022] In one type of gantry frame described above, a vibration damping base is fixedly connected to the mounting plate, and a vibration damper is provided on the vibration damping base. The vibration damper is fixedly connected to the connecting piece.

[0023] The introduction of vibration dampers (such as rubber damping pads, spring dampers, etc.) establishes an effective vibration isolation layer between the upper roller assembly (and the vibration and impact of the plate it transmits) and the main structure of the gantry. This significantly reduces the amplitude of vibration and impact loads transmitted upstream to the main structure of the gantry and downstream to the conveyed plate. This protects the gantry structure, extends its service life, and reduces the upper roller bounce caused by vibration, ensuring a smoother plate conveying process, improving conveying accuracy and plate surface quality (reducing scratches and bounce marks), while also reducing operating noise.

[0024] A conveying mechanism, characterized in that it comprises a base, an upper roller assembly, a lower roller assembly, a plate support frame, and the aforementioned gantry frame. The gantry frame is fixedly connected to the right side of the base. The lower roller assembly is mounted on the base and located on the left side of the gantry frame. The upper roller assembly is located above the lower roller assembly and is fixedly connected to a connecting member of the gantry frame. A feeding gap for conveying plates is provided between the upper roller assembly and the lower roller assembly. The plate support frame extends out of the right side of the base and is fixedly connected to the base. The supporting surface of the plate support frame that contacts the plate is flush with the lower edge of the feeding gap.

[0025] This conveying mechanism, by combining the single-sided gantry frame (replacing the traditional double-sided columns + beams) with the lower roller assembly and upper roller assembly located on its left side, completely frees up space in the width direction of the equipment. During the conveying and processing of the sheet metal, there is no rigid frame (gantry beam) obstructing its left side. It only requires single-sided support drive on the right side (upper and lower roller clamping drive) and auxiliary support on the left side (sheet metal support frame). This enables the equipment to process sheet metal with a width much greater than the traditional gantry beam length limitation.

[0026] Furthermore, the single-sided gantry structure is inherently simpler and lighter than the traditional double-sided gantry. Combined with the aforementioned simplified design of the gantry itself, the entire conveying mechanism is significantly simplified, effectively reducing manufacturing, installation, and maintenance costs. The design of the plate support frame's support surface being flush with the lower edge of the feeding gap provides continuous and stable auxiliary support for plates entering or leaving the roller clamping area (especially wide plates with large spans and a tendency to sag), effectively preventing excessive bending or jamming of the plates due to their own weight during conveying, ensuring the continuity and stability of the conveying process. The single-sided gantry layout also improves the accessibility of the equipment's interior and roller area, facilitating the inspection, maintenance, or replacement of the roller assembly. Meanwhile, as mentioned earlier, the adjustment of the upper roller module (suspension part) is relatively independent and convenient.

[0027] Compared with the prior art, the technical effects of this utility model are as follows:

[0028] This invention replaces the traditional rigid beam structure spanning the width of the equipment with a suspended vertical suspension unit for mounting the upper roller assembly. This significantly simplifies the gantry frame, allowing for a lighter and more compact design, effectively reducing material usage and manufacturing costs. By eliminating the rigid beam spanning the equipment width, the gantry frame only needs to be installed on one side of the equipment (usually the feeding or operating side). This eliminates the restriction on the width of the sheet metal on the other side of the equipment, fundamentally removing the physical limitation imposed by the gantry frame on the processing width of the sheet metal. This allows the equipment to easily adapt to the processing needs of sheet metal of different widths (especially wider ones) without requiring a complete replacement of the gantry frame structure due to changes in sheet metal width.

[0029] The single-sided gantry frame of this invention (replacing the traditional double-sided columns + crossbeams) works in conjunction with the lower roller assembly and upper roller assembly located on its left side, completely freeing up space in the width direction of the equipment. During the conveying and processing of the sheet metal, there is no rigid frame (gantry beam) obstructing its left side. It only requires single-sided support drive on the right side (upper and lower roller clamping drive) and auxiliary support on the left side (sheet metal support frame). This enables the equipment to process sheet metal with a width much greater than the length limitation of the traditional gantry beam. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the gantry frame of this utility model.

[0031] Figure 2 This is an overall sectional view of the gantry frame of this utility model.

[0032] Figure 3 This is a partial enlarged view of the end of the conveying mechanism of this utility model.

[0033] In the diagram, 1. Vertical support; 2. Horizontal connection; 3. Vertical suspension; 4. Diagonal connection; 5. Mounting plate; 6. Front side plate; 7. Rear side plate; 8. Connecting plate; 9. Reinforcing plate; 10. Base plate; 101. Bottom mounting hole; 102. Cable guide hole; 11. Vibration damping base; 12. Vibration damper; 13. Connecting piece; 14. Base; 15. Upper roller assembly; 16. Lower roller assembly; 17. Plate support frame; 171. Support surface; 18. Feeding gap. Detailed Implementation

[0034] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0035] This gantry crane includes a vertical support section 1, a horizontal connecting section 2, and a vertical suspension section 3. One end of the horizontal connecting section 2 is fixedly connected to the upper end of the vertical support section 1, and the other end is fixedly connected to the upper end of the vertical suspension section 3. A mounting plate 5 is fixedly connected to the lower end of the vertical suspension section 3 on the side wall facing the vertical support section 1. The mounting plate 5 is vertically arranged, and the height of the vertical suspension section 3 is less than the height of the vertical support section 1. The mounting plate 5 is positioned opposite to the middle of the vertical support section 1. This gantry crane uses a suspended vertical suspension section 3 to install the upper roller assembly 15, replacing the traditional integral rigid beam structure that spans the width of the equipment. This significantly simplifies the main body of the gantry crane, allowing it to be designed to be lighter and more compact, effectively reducing material usage and manufacturing costs. This invention eliminates the rigid crossbeam spanning the width of the equipment. The gantry frame only needs to be installed on one side of the equipment (usually the feeding side or the operating side), so that there are no columns on the other side of the equipment to limit the width of the sheet material. This fundamentally eliminates the physical limitation of the gantry frame on the processing width of the sheet material, allowing the equipment to easily adapt to the processing needs of sheet materials of different widths (especially larger widths) without having to replace the entire gantry frame structure due to changes in the width of the sheet material.

[0036] like Figure 2 As shown, the width W of the lower part of the vertical support 1 gradually increases from top to bottom. The tapered design of the support, which is wider at the bottom and narrower at the top, significantly lowers the overall center of gravity of the equipment, greatly improving the gantry's ability to resist overturning moments (mainly from the lateral force applied by the upper roller assembly 15 or the eccentric load during the conveying of the plates), ensuring more stable and reliable equipment operation. Furthermore, this structure conforms to the equal strength design concept, providing the maximum cross-sectional width and moment of inertia at the root of the support (where it connects to the base 14) where the stress is greatest, effectively resisting bending moments and shear forces. Thus, while ensuring structural stiffness and strength, it avoids redundant material waste, achieving a balance between lightweight and high rigidity and strength.

[0037] Furthermore, the connection points between the transverse connecting part 2 and the vertical support part 1, as well as the connection points between the transverse connecting part 2 and the vertical suspension part 3, are all equipped with inclined connecting parts 4. The inclined connecting parts 4 achieve a smooth transition of structural cross-section changes, effectively avoiding stress concentration phenomena that are prone to occur at right-angle connections, significantly reducing the risk of fatigue failure of key connection parts under long-term alternating loads (such as upper roller vibration and plate impact), and greatly improving the overall structural durability and service life of the gantry frame; the inclined structure provides a larger connection area and a better force flow transmission path, further strengthening the rigidity and strength of the connection nodes between the vertical support part 1, the transverse connecting part 2, and the vertical suspension part 3, ensuring that the entire gantry frame deforms less and runs more smoothly under stress.

[0038] like Figure 1 and Figure 2As shown, the vertical support part 1, the horizontal connecting part 2, the vertical suspension part 3, and the two oblique connecting parts 4 each include a front side plate 6, a rear side plate 7, and a connecting plate 8. The connecting plate 8 is disposed between the front side plate 6 and the rear side plate 7 and is fixedly connected to the outer edge of the front side plate 6 and the outer edge of the rear side plate 7. All front side plates 6 are formed as a single piece, all rear side plates 7 are formed as a single piece, and all connecting plates 8 are formed as a single piece. Several reinforcing plates 9 are disposed between the front side plate 6 and the rear side plate 7, and the two ends of the reinforcing plates 9 are fixedly connected to the front side plate 6 and the rear side plate 7 respectively. It also includes a base plate 10. The lower ends of the front side plate 6, the rear side plate 7, and the connecting plate 8 of the vertical support part 1 are all welded and fixed to the base plate 10. The base plate 10 is provided with multiple bottom mounting holes 101 for fixing the gantry frame.

[0039] The hollow box-type or plate structure, consisting of a front side plate 6, a rear side plate 7, and a connecting plate 8, with internal reinforcing plates 9, is an extremely efficient structural form. This design minimizes the structural weight and optimizes material utilization efficiency while ensuring sufficient overall and local rigidity and strength. Each component (front side plate 6, rear side plate 7, and connecting plate 8) is integrally formed (e.g., sheet metal welding, casting), greatly reducing the number of parts and complex assembly processes. This not only lowers manufacturing costs but also helps ensure the geometric accuracy of each component and the overall assembly quality, ensuring the stability of the gantry frame's performance. The internal reinforcing plates 9 effectively suppress the risk of buckling deformation of thin-walled plates under pressure or bending, further improving the overall stability and load-bearing capacity of the structure. The base plate 10 structure provides a rigid and flat installation reference surface for the entire gantry frame. Through the multiple bottom mounting holes 101 on the base plate 10, the gantry frame can be conveniently, quickly, and accurately positioned and firmly fixed to the equipment base 14, greatly simplifying the on-site installation and commissioning process and ensuring installation accuracy and structural stability.

[0040] Furthermore, both the base plate 10 and the reinforcing plate 9 are provided with wire holes 102. The design of the aforementioned wire holes 102 facilitates the installation of wires, pipes, etc., and makes the wiring more aesthetically pleasing without affecting the overall structural strength of the gantry frame, while avoiding interference with the upper roller assembly 15 and other bending mechanisms.

[0041] Furthermore, a vibration damping base 1411 is fixedly connected to the mounting plate 5, and a vibration damper 12 is installed on the vibration damping base 1411. The vibration damper 12 is fixedly connected to the connecting piece 13. The introduction of the vibration damper 12 (such as a rubber damping pad, spring damper, etc.) establishes an effective vibration isolation layer between the upper roller assembly 15 (and the plate vibration and impact transmitted by it) and the main structure of the gantry frame. This significantly reduces the amplitude of vibration and impact loads transmitted upstream to the main structure of the gantry frame and downstream to the conveyed plate. This protects the gantry frame structure, extends its service life, and reduces the upper roller jump caused by vibration, ensuring a smoother plate conveying process, improving conveying accuracy and plate surface quality (reducing scratches and jump marks), while also reducing operating noise.

[0042] A conveying mechanism includes a base 14, an upper roller assembly 15, a lower roller assembly 16, a plate support frame 17, and the aforementioned gantry frame. The gantry frame is fixedly connected to the right side of the base 14. The lower roller assembly 16 is mounted on the base 14 and located on the left side of the gantry frame. The upper roller assembly 15 is located above the lower roller assembly 16 and is fixedly connected to the connecting member 13 of the gantry frame. There is a feeding gap 18 between the upper roller assembly 15 and the lower roller assembly 16 for conveying plates. The plate support frame 17 extends out of the right side of the base 14 and is fixedly connected to the base 14. The support surface 171 of the plate support frame 17 in contact with the plate is flush with the lower edge of the feeding gap 18. This conveying mechanism, by combining the single-sided gantry frame (replacing the traditional double-sided columns + beams) with the lower roller assembly 16 and upper roller assembly 15 located on its left side, completely frees up space in the width direction of the equipment. During the conveying and processing of the sheet metal, there is no rigid frame (gantry beam) obstructing its left side. It only requires single-sided support drive on the right side (upper and lower roller clamping drive) and auxiliary support on the left side (sheet metal support frame 17). This enables the equipment to process sheet metal with a width much greater than the traditional gantry beam length limitation.

[0043] Furthermore, the single-sided gantry structure is inherently simpler and lighter than the traditional double-sided gantry. Combined with the aforementioned simplified design of the gantry itself, the structure of the entire conveying mechanism is significantly simplified, effectively reducing manufacturing, installation, and maintenance costs. The design of the support surface 171 of the plate support frame 17 being flush with the lower edge of the feeding gap 18 provides continuous and stable auxiliary support for plates entering or leaving the roller clamping area (especially wide plates with large spans and a tendency to sag), effectively preventing excessive bending or jamming of the plates due to their own weight during conveying, ensuring the continuity and stability of the conveying process. The single-sided gantry layout also improves the accessibility of the equipment interior and the roller area, facilitating the inspection, maintenance, or replacement of the roller assembly. At the same time, as mentioned above, the adjustment of the upper roller module (suspension part) is relatively independent and convenient.

[0044] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection defined by the claims of the present utility model.

Claims

1. A gantry frame for a wooden board bending machine, characterized in that: It includes a vertical support part (1), a horizontal connecting part (2) and a vertical suspension part (3). One end of the horizontal connecting part (2) is fixedly connected to the upper end of the vertical support part (1) and the other end is fixedly connected to the upper end of the vertical suspension part (3). A mounting plate (5) is fixedly connected to the lower end of the vertical suspension part (3) and the side wall facing the vertical support part (1). The mounting plate (5) is vertically arranged. The height of the vertical suspension part (3) is less than the height of the vertical support part (1). The mounting plate (5) is arranged opposite to the middle of the vertical support part (1).

2. The gantry frame of the wooden board bending equipment according to claim 1, characterized in that: The width W of the lower part of the vertical support (1) gradually increases from top to bottom.

3. The gantry frame of the wooden board bending equipment according to claim 1, characterized in that: The connection between the horizontal connecting part (2) and the vertical support part (1) and the connection between the horizontal connecting part (2) and the vertical suspension part (3) are both provided with inclined oblique connecting parts (4).

4. The gantry frame of the wooden board bending equipment according to claim 3, characterized in that: The vertical support (1), the horizontal connecting part (2), the vertical suspension part (3) and the two oblique connecting parts (4) each include a front side plate (6), a rear side plate (7) and a connecting plate (8). The connecting plate (8) is disposed between the front side plate (6) and the rear side plate (7) and is fixedly connected to the outer edge of the front side plate (6) and the outer edge of the rear side plate (7). All front side plates (6) are formed as an integral structure. All rear side plates (7) are formed as an integral structure. All connecting plates (8) are formed as an integral structure. Several reinforcing plates (9) are disposed between the front side plate (6) and the rear side plate (7). The two ends of the reinforcing plates (9) are fixedly connected to the front side plate (6) and the rear side plate (7) respectively.

5. The gantry frame of a wooden board bending machine according to claim 4, characterized in that: Includes a base plate (10), the lower ends of the front side plate (6), rear side plate (7) and connecting plate (8) of the vertical support part (1) are all welded and fixed to the base plate (10), and the base plate (10) is provided with a plurality of bottom mounting holes (101) for fixing the gantry frame.

6. The gantry frame of a wooden board bending machine according to claim 5, characterized in that: Both the base plate (10) and the reinforcing plate (9) are provided with wire holes (102).

7. The gantry frame of a wooden board bending machine according to any one of claims 1-6, characterized in that: A vibration damping base (11) is fixedly connected to the mounting plate (5), and a vibration damper (12) is provided on the vibration damping base (11). The vibration damper (12) is fixedly connected to the connector (13).

8. A conveying mechanism, characterized in that: The system includes a base (14), an upper roller assembly (15), a lower roller assembly (16), a plate support frame (17), and a gantry as described in any one of claims 1-7. The gantry is fixedly connected to the right side of the base (14). The lower roller assembly (16) is mounted on the base (14) and located on the left side of the gantry. The upper roller assembly (15) is located above the lower roller assembly (16) and is fixedly connected to the connector (13) of the gantry. There is a feeding gap (18) between the upper roller assembly (15) and the lower roller assembly (16) for conveying the plate. The plate support frame (17) extends out of the right side of the base (14) and is fixedly connected to the base (14). The support surface (171) of the plate support frame (17) in contact with the plate is flush with the lower edge of the feeding gap (18).

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