TW201827304A - Frame structure of box body and manufacturing method thereof comprise an upper frame body and a lower frame body, and plural support brackets and reinforcing brackets for fast assembling and precise alignment, and reducing the deformation - Google Patents

Abstract

A frame structure of box body is disclosed, which comprises: an upper frame body and a lower frame body, and plural support brackets and reinforcing brackets connected to the upper frame body and the lower frame body. At least one of the upper frame body and the lower frame body comprises plural side plates disposed along the periphery of frame body, and also comprises a first trench plate extending outward from the bottom rim of side plate. Both ends of each side plate have a joining part respectively. The support brackets respectively comprise a first edge plate and an adjacent second edge plate, also, each support bracket has a joined part respectively on the first edge plate and the second edge plate of at least one end. The joined part of the first edge plate is connected to the joining part of the side plate. The joined part of the second edge plate is connected to the joining part of the other side plate, thereby achieving the effect of fast assembling and precise alignment, and also reducing the deformation situation.

Description

Box skeleton structure and manufacturing method thereof

The present invention relates to industrial cabinets; in particular, it relates to a cabinet skeleton structure and a manufacturing method thereof.

Known industrial boxes (such as cabinets, transformer boxes, etc.) are mostly used to provide power distribution or component placement for machine boards, and are one of the facilities for power supply or mechanical equipment settings.

Generally speaking, the box structure of an industrial box is formed by a combination of a skeleton and several rigid plates. Among them, the skeleton is formed by passing through long angle irons, cutting them to an appropriate length, and then stitching and combining these angle irons.

The structural characteristics of traditional angle irons are that the angle iron's cross-sectional shape is L-shaped. It is an integrally formed two plates that are perpendicular to each other. Each of the plates is formed with several elongated holes, which are used as coupling holes for locking alignment. . Therefore, when assembling the skeleton, one end of the sheet of each angle iron is overlapped with one end of the sheet of the other angle iron, and the overlap is welded to improve the bonding strength between the two angle irons.

However, the structural design of the aforementioned angle iron cannot delay the assembly personnel to adjust the alignment position quickly and appropriately, which results in that the assembly personnel need to spend extra time to complete the assembly and fixing operations, thereby delaying the assembly speed. In addition, because the general commercially available The angle iron itself often has manufacturing errors, so that when the box is assembled, the misalignment between the angle irons often occurs, thereby increasing the difficulty of assembly. In addition, in the process of welding and reinforcing the bracket and the angle iron, the angle iron will be affected by the heat conduction at the welding place, which will cause the angle iron to deform due to heat (especially the center of the angle iron is more likely to be distorted or expanded after being heated. Case), resulting in a non-rectangular deformation of the assembled skeleton, or the original length of the angle iron will be changed after thermal deformation of the angle iron. The consequences will also lead to the embarrassment of the skeleton's finished shape not conforming to the design appearance. In this way, the assembly personnel in the assembly of the box skeleton, the assembly personnel still need to use tools to beat or hit the angle of iron deformation to correct the deformation of the place, however, because the beating or hitting work is done manually There must be a certain amount of error, which makes the design of the box skeleton used to assemble using angle iron not only increase the assembly time and difficulty, but also cannot effectively and accurately control the size after assembly. Therefore, the above-mentioned method for assembling the box skeleton using the angle iron has not yet been perfected, and there is still room for improvement.

The object of the present invention is to provide a box skeleton structure and a manufacturing method thereof, which are convenient for assembly personnel to quickly and accurately align, so that the assembly operation of the box skeleton structure can be completed in a short time.

In order to achieve the above object, the present invention provides a cabinet skeleton structure including an upper frame and a lower frame, and a plurality of brackets connecting the upper frame and the lower frame, which are characterized in that the upper frame and the lower frame At least one of the frames includes a plurality of side plates disposed along the periphery of the frame. Each end of each side plate has a joint portion at a distance from the joint portion of an adjacent side plate. The brackets include: A first side plate and a second side plate are adjacent to each other, and each bracket has a coupled portion on at least one of the first side plate and the second side plate, wherein the bonded portion of the first side plate It is connected to a joint portion of one side plate, and a joined portion of the second side plate is connected to a joint portion of the other side plate.

In order to achieve the above object, a manufacturing method of a box skeleton structure provided by the present invention includes the following steps: cutting a metal plate to obtain at least one frame plate and a plurality of bracket plates, wherein the frame plate has a main body A frame plate and four side plates disposed along the periphery of the main frame plate, each of which has a joint portion at each end; each of the bracket plates has a first side plate and a second side plate connected, and each A bracket plate has a combined portion on each of the first side plate and the second side plate at least at one end; each side plate is bent, each side plate is perpendicular to the main frame plate, and each of the joint portions is adjacent to each other. There is a space between the joints of the side plates to form a frame; each of the first side plates is bent, so that each of the first side plates is perpendicular to each of the second side plates, so as to form a plurality of brackets; The joined portion of the first side plate is connected to the joint portion of one side plate, and the joined portion of the second side plate of each bracket is connected to the joint portion of the other side plate.

In order to achieve the above object, a method for manufacturing a transformer box structure provided by the present invention includes the following steps: cutting a metal plate to obtain a plurality of frame plates and a plurality of bracket plates, wherein each of the frame plates has a phase The connected side plate and a main plate, and each of the frame plates has a joint portion on at least one side plate and the main plate; each of the bracket plates has a first side plate and a second side plate connected, and each The bracket plate has a combined portion on the first side plate and the second side plate of at least one end respectively; each side plate is bent, so that each side plate is perpendicular to the main plate, thereby forming a plurality of frames; and the main plate of each frame The joint portion of the frame is connected to the joint portion of the main plate of the other frame, and a gap is formed between the joint portion of each of the side plates and the joint portion of an adjacent side plate to form a frame body; each of the first side plates is bent So that each of the first side plates is perpendicular to each of the second side plates, thereby forming a plurality of brackets; and connecting the joined portion of the first side plate of each of the brackets with a joint portion of a side plate, and connecting each of the branches Binding portion of the second side plate and the side plate of the other link joint.

The effect of the present invention is that the assembly of the skeleton structure of the box body can be completed quickly, and accurate alignment and reduction of the deformation of the overall structure of the box body can be achieved.

In order to explain the present invention more clearly, two preferred embodiments are described in detail below with reference to the drawings. Please refer to FIG. 1 to FIG. 2, which is a box skeleton structure 1 of the first preferred embodiment of the present invention, which includes an upper frame 10, a lower frame 20, and a plurality of brackets 30 and auxiliary frames 40. The corresponding relationship between the aforementioned components and the manufacturing method of each component will be introduced one by one below.

In this embodiment, the upper frame body 10 and the lower frame body 20 have the same structural appearance, both of which are cut from a metal plate to obtain two frame plates 101, and then are respectively bent into frame structures. Therefore, in order to facilitate the description below, a frame (the upper frame 10) is selected for introduction.

As shown in FIG. 3 and FIG. 4, the frame plate 101 has a main frame plate 12, four side plates 14, and a first groove plate 16. The main frame plate 12 is square and has a basket at the center. The side plates 14 are disposed along the periphery of the main frame plate 12, and two ends of each of the side plates 14 have a joint portion 141 respectively. In this embodiment, each of the joint portions 141 is a protrusion, which corresponds to itself. An end edge of the side plate 14 is formed to protrude outward. In addition, two of the side plates 14 are respectively provided with a connecting portion 142, and each of the connecting portions 142 is located between the two of the connecting portions 141 of the corresponding side plate 14. In this embodiment, each of the connecting portions 142 is a groove. The first groove plate 16 is connected to a peripheral edge of the side plate 14, and the side plate 14 is not provided with a connecting portion 142.

When the frame plate 101 is bent, a force is applied to each of the side plates 14 so that each of the side plates 14 is perpendicular to the main frame plate 12; and a force is applied to the first groove plate 16 An angle (90 degrees in this embodiment) is sandwiched between the first groove plate 16 and the corresponding side plate 14, so that the frame plate 101 is bent into the upper frame 10. Wherein, the coupling portion 141 of each side plate 14 of the upper frame 10 is spaced apart from the coupling portion 141 of the adjacent side plate 14; the first groove plate 16 extends outward from the peripheral edge of the corresponding side plate 14. , Used as a guide groove to guide rainwater.

Four brackets 30 are used as an example in this embodiment, and their main structures are the same. After being cut from a metal plate to obtain each bracket plate, the brackets 30 are respectively bent.

Each of the bracket plates that has not been bent has a first side plate 32 and a second side plate 34 connected to each other, and each bracket plate has a cover on the first side plate 32 and the second side plate 34 at both ends, respectively. The connecting portions 321 and 341 are each formed with a groove in the embodiment, and are formed by being recessed inward from the peripheral edge of the corresponding side plate.

When performing bending operations on each of the bracket plates, a force is applied to each of the first side plates 32 so that each of the first side plates 32 is perpendicular to each of the second side plates 34 to form a plurality of brackets 30, The two ends of each bracket 30 are connected to the upper frame 10 and the lower frame 20 respectively.

Among them, please refer to FIG. 5 to FIG. 7, each bracket 30 is combined with the upper frame 10 and the lower frame 20 by welding. Preferably, the two brackets 30 are assembled on the diagonal first. The frame 10 and the lower frame 20 (as shown in FIG. 5), and then the other two brackets 30 are assembled at the other corner of the upper frame 10 and the lower frame 20 (as shown in FIG. 6) ) To improve the stability of the assembled product of the box skeleton structure 1.

In addition, the solder is filled between or around each of the joined portions 321, 341 and the joined portion 141, so that the joined portion 321 of the first side plate 32 is connected to the joined portion 141 of the side plate 14, and The jointed portion 341 of the second side plate 34 is connected to the joint portion 141 of the other side plate 14 for fixing. It is worth mentioning that the concave-convex configuration design between the jointed portions 321 and 341 of each bracket 30 and the joint portion 141 of the side plate 14 helps the assembly personnel to quickly and accurately align to improve the assembly efficiency. Design, after assembly, the surfaces of the joints of the upper and lower frames 10, 20 and the bracket 30 are flatter, and thereby obtain a rectangular box skeleton structure 1 to improve the subsequent difficulties in assembling the board due to the deformation of the box structure in the past Dilemma.

Furthermore, through the above-mentioned design, in this embodiment, the thermal deformation of the upper frame body 10, the lower frame body 20, and the bracket 30 during welding will be caused by the unevenness between each of the bonded portions 321, 341 and the bonded portion 141. The design takes place at the raised or recessed structure, so that the upper frame body 10, the lower frame body 20 and the bracket 30 can avoid serious deformation during welding. In addition, the welding range of the upper frame 10, the lower frame 20, and the bracket 30 during soldering is located in the area filled by the solder, that is, between the embossed portions 321, 341 and the bonding portion 141 arranged in an uneven manner, which is greatly reduced. The heating range between the upper frame 10, the lower frame 20, and the bracket 30 is to reduce the occurrence of structural deformation.

It is mentioned that the two brackets 30 in this embodiment further include a second groove plate 36, one of which is connected to the first side plate 32 of the bracket 30, and the other is connected to the other On the second side plate 34 of the bracket 30; when bending the two bracket plates, a force will be applied to the two second groove plates 36 respectively, so that the two second groove plates 36 and the corresponding An angle (90 degrees in this embodiment) is sandwiched between the side plates, and the two second groove plates 36 are respectively abutted to one end of the first groove plate 36 so as to be in contact with the first groove plate 16. Together, they form a guide channel for rainwater.

The number of the auxiliary racks 40 in this embodiment is exemplified by two, and their structures are the same. The auxiliary racks 40 are cut from metal plates to obtain each auxiliary rack plate, and then are respectively bent into auxiliary rack structures.

Each of the reinforcing frame plates has a third side plate 42 and a fourth side plate 44 connected to each other, and each reinforcing frame plate has a connected portion on the third side plate 42 and the fourth side plate 44 at both ends, respectively. 421, 442. In this embodiment, the length of each of the third side plates 42 is longer than the length of each of the fourth side plates 44, and the connected portion 421 of each of the third side plates 42 refers to an end surface of the third side plate 42; In this embodiment, the connected portion 441 of each of the fourth side plates 44 is a protrusion, which is formed by protruding from an end edge of the corresponding fourth side plate 44.

The purpose of each of the reinforcing frames 40 is to improve the overall strength of the box skeleton structure 1. Please refer to FIG. 8 and FIG. 1. When assembling, the reinforcing frame 40 is also connected to the upper frame 10 and the lower frame by welding. On the body 20, the solder is filled between the connected portions 421, 441 of the reinforcing frame 40 and the main frame plate 12, and the connected portions 421, 441 of the reinforcing frame 40 and the corresponding one are filled. Between the connecting portions 142 of the side plate 14, the connected portion 421 of each third side plate 42 is connected to the main frame plate 12, and the connected portion 441 of each fourth side plate 44 is connected to one of the side plates 14. The connecting portion 142 is connected.

The design of the concave-convex structure between the connecting portion 142 and the connected portion 441 is the same as the principle of each of the 321 and 341 combined portions and 141 combined portions, which can facilitate the assembly personnel to quickly and accurately locate the workpiece, thereby improving the completion efficiency and the finished product. The accuracy can reduce the deformation of the reinforcing frame 40.

In fact, in order to achieve precise alignment and reduce the deformation of the overall structure of the cabinet, in addition to the above-mentioned cabinet skeleton structure 1, it can also be achieved by other methods. The box skeleton structure 2 according to the second preferred embodiment of the present invention shown in FIG. 9 and FIG. 10 includes an upper frame 50, a lower frame 60, and four brackets 70 and two similar to the above embodiment. Root auxiliary frame 80.

The structures of the upper frame 50 and the lower frame 60 of this embodiment are different from the upper frame 10 of the first embodiment, which are integrally formed. In this embodiment, the upper frame 50 and the lower frame 60 are integrally formed. The structure is the same and is formed by the splicing of multiple frames, which will be described below by the upper frame.

Each of the frames 52 is cut from a metal plate to obtain each frame plate, and then is separately bent and formed. Each of the frame plates has a side plate 521 and a main plate 522 connected to each other, and each of the frame plates has a joint portion 521a, 522a on the side plate 521 and the main plate 522 at both ends, and each side plate 521 has a connection portion 521b. Located between the two joint portions 521a. After that, each of the side plates 521 is bent, so that each of the side plates 521 is perpendicular to each of the main plates 522, so as to form a plurality of frames 52. It is mentioned that, in other embodiments, one of the frames 52 may include a first groove plate 523 connected to the corresponding peripheral edge of the side plate 521, and an angle is formed between the side plate 521 and the side plate 521 as a guide. Trench for rain.

When assembling the upper frame 50, the joint portion 521a of the main plate 522 of each frame 52 and the joint portion 522a of the main plate 522 of the other frame 52 are connected, and the joint portion 521a of each side plate 521 and an adjacent side plate are connected. The bonding portions 521a of 521 are spaced apart from each other, and the upper frame body 60 is formed by splicing.

The manufacturing method and structure of each bracket 70 are the same as those of the bracket 30 of the first embodiment. When assembling, the bonded portion 721 of the first side plate 72 of each bracket 70 and a combined portion of the side plate 521 are welded. 521a is connected, and the combined portion 741 of the second side plate 74 of each bracket 70 is connected to the combined portion 521a of the other side plate 521 to achieve the effect of rapid assembly and stable combination.

The manufacturing method of each auxiliary frame 80 is the same as that of the auxiliary frame 40 of the first embodiment, and its structure also includes a third side plate 82 and a fourth side plate 84 connected to each other. Each third side plate 82 in this embodiment is correspondingly connected to a main board 522, and the connected portion 841 of each fourth side plate 84 is connected to a connection portion 521a of the side plate 521.

In summary, the design of the box skeleton structure of the present invention can facilitate the rapid alignment of the assembly process to improve the assembly efficiency. In addition, the scope of the welding area is reduced, and the overall structure of the box is reduced. Deformation.

The above descriptions are only the preferred and feasible embodiments of the present invention. For example, any equivalent changes made by applying the description of the creation and the scope of patent application should be included in the scope of the patent of the creation.

[this invention]

1‧‧‧Box skeleton structure

10‧‧‧ Upper frame

101‧‧‧Frame board

12‧‧‧ main frame

14‧‧‧Side

141‧‧‧Combination

142‧‧‧Connection Department

16‧‧‧The first groove plate

20‧‧‧ lower frame

30‧‧‧ Bracket

32‧‧‧First side plate

34‧‧‧Second side plate

321, 341‧‧‧‧

36‧‧‧Second groove plate

40‧‧‧ auxiliary frame

42‧‧‧ Third side plate

44‧‧‧ Fourth side plate

421, 441‧‧‧‧ Connected

2‧‧‧Box skeleton structure

50‧‧‧ Upper frame

52‧‧‧Frame

521‧‧‧Side

521b‧‧‧ Connection

522‧‧‧Motherboard

521a, 522a‧‧‧ junction

523‧‧‧The first groove plate

60‧‧‧ lower frame

70‧‧‧ bracket

72‧‧‧First side plate

721‧‧‧Combined Department

74‧‧‧Second side plate

741‧‧‧Combined Department

80‧‧‧ auxiliary frame

82‧‧‧ Third side plate

84‧‧‧ Fourth side plate

841‧‧‧ Connected

FIG. 1 is a perspective view of a skeleton structure of a cabinet according to a first preferred embodiment of the present invention. FIG. 2 is an exploded perspective view of the embodiment shown in FIG. 1. FIG. 3 is a schematic view of a frame plate according to the embodiment shown in FIG. 1, revealing that four side plates are arranged along the periphery of the main frame plate. FIG. 4 is an upper frame of the embodiment shown in FIG. 1. FIG. 5 is an assembly flowchart of the embodiment shown in FIG. 1, which reveals that the bracket is assembled diagonally on the upper frame and the lower frame. FIG. 6 is an assembly flowchart of the embodiment shown in FIG. 1, revealing that the other bracket is assembled diagonally on the upper frame and the lower frame. FIG. 7 is a schematic diagram of the embodiment shown in FIG. 1, and discloses a joint portion of a side plate and a joint portion of a bracket. FIG. 8 is a schematic diagram of the embodiment shown in FIG. 1, which discloses the connecting portion of the side plate and the connected portion of the auxiliary frame. FIG. 9 is a perspective view of a skeleton structure of a cabinet according to a second preferred embodiment of the present invention. FIG. 10 is an exploded perspective view of the embodiment shown in FIG. 9.

Claims (20)

A cabinet skeleton structure includes an upper frame and a lower frame, and a plurality of brackets connecting the upper frame and the lower frame, characterized in that at least one of the upper frame and the lower frame includes: Most side plates are arranged along the periphery of the frame, and two ends of each side plate each have a joint portion, and there is a gap between the joint portions of adjacent side plates; the brackets each include an adjacent first side plate. And a second side plate, and each bracket has a combined portion on the at least one end of the first side plate and the second side plate, wherein the combined portion of the first side plate is connected to a combined portion of the side plate, The joined portion of the second side plate is connected to the joined portion of the other side plate. The box skeleton structure according to claim 1, including a plurality of reinforcing frames, including a third side plate and a fourth side plate adjacent to each other, and each reinforcing frame has at least one third side plate And a fourth side plate respectively has a connected portion; at least one of the upper frame body and the lower frame body includes a main frame plate, the side plates are connected to the periphery of the main frame plate, and each side plate has a The connecting portion is located between the two connecting portions; wherein the connected portion of each third side plate is connected to the main frame plate, and the connected portion of each fourth side plate is connected to a connecting portion of the side plate. The cabinet skeleton structure according to claim 1, wherein at least one of the upper frame and the lower frame includes a plurality of motherboards, and the motherboards are formed to surround the frame and are respectively connected to a corresponding one of the side plates. Each end of each motherboard has a joint portion, and is connected to the joint portions of adjacent motherboards. The box skeleton structure according to claim 3, including a plurality of reinforcing frames, including a third side plate and a fourth side plate adjacent to each other, and a third side plate of each reinforcing frame at at least one end. And a fourth side plate has a connected portion; each third side plate has a connected portion connected to the main board; each side plate has a connecting portion between the two joint portions, and each fourth side plate has a connected portion; The connected portion is connected to a connecting portion of the side plate. The box skeleton structure according to claim 2 or 4, wherein the upper frame includes a first groove plate extending outward from a peripheral edge of one of the side plates. The box skeleton structure according to claim 5, wherein at least one of the first side plate and the second side plate of the bracket is further connected with a second groove plate, and the second groove plate extends outward. An end of the first trench plate is formed and abutted. The box skeleton structure according to claim 2 or 4, wherein the length of the third side plate of each of the reinforcing frames is longer than the length of the fourth side plate. According to the box skeleton structure described in claim 1, one of the joint portion of each side plate and the joint portion of each bracket is a bump, and the other is a groove. A manufacturing method of a box skeleton structure includes the following steps: cutting a metal plate to obtain at least one frame plate and a plurality of bracket plates, wherein the frame plate has a main frame plate and four along the main frame; A side plate provided at the periphery of the plate, each of which has a joint portion at both ends; each of the bracket plates has a first side plate and a second side plate connected, and each bracket plate is on at least one first side of the first side The plate and the second side plate each have a combined portion; bending each of the side plates so that each of the side plates is perpendicular to the main frame plate, and leaving a distance between each of the combining portions and the combining portion of an adjacent side plate, Thereby forming a frame body; bending each of the first side plates, so that each of the first side plates is perpendicular to each of the second side plates, thereby forming a plurality of brackets; and a combined portion of the first side plates of each of the brackets It is connected to a joint portion of one side plate, and a joined portion of a second side plate of each bracket is connected to a joint portion of another side plate. For example, the manufacturing method of the box skeleton structure of claim 9, wherein each of the brackets is bonded to the frame by welding, and the solder is filled in the bonded portion of each of the brackets and a corresponding one of the bonded portions of the side plate. between. For example, the manufacturing method of the box skeleton structure of claim 9, wherein after cutting the metal plate, a plurality of reinforcing frame plates are obtained, and each of the reinforcing frame plates has a third side plate and a fourth side plate connected to each other. And each reinforcing frame plate has a connected portion on at least one of the third side plate and the fourth side plate; each third side plate is bent so that each third side plate is perpendicular to each fourth side Plate to form a plurality of reinforcing frames; the connected portion of the third side plate of each reinforcing frame is connected to the main frame plate; each side plate has a connecting portion between the two connecting portions, and each fourth The connected portion of the side plate is connected to a connection portion of the side plate. For example, the manufacturing method of the box skeleton structure of claim 11, wherein each of the reinforcing frames is welded to the frame, and the solder is filled between the connected portion of each of the reinforcing frames and the main frame plate, And filled in between the connected portion of each of the reinforcing frames and a corresponding one of the side plates. For example, the manufacturing method of the box skeleton structure of claim 9, wherein the frame plate includes a first groove plate connected to a peripheral edge of the side plate; the first groove plate is bent, and the first groove plate and the The corresponding side plate is clamped at an angle. For example, the method for manufacturing a box skeleton structure of claim 9, wherein at least one of the bracket plates includes a second groove plate connecting one of the first edge plate and the second edge plate; and bending the second groove The slot plate makes the second slot plate be angled with the corresponding knitting plate. A manufacturing method of a box skeleton structure includes the following steps: cutting a metal plate to obtain a plurality of frame plates and a plurality of bracket plates, wherein each of the frame plates has a side plate and a main plate connected to each other, and The frame plate has a joint portion on at least one side plate and the main board; each bracket plate has a first side plate and a second side plate connected, and each of the bracket plates has a first side plate and The second side plate has a combined portion; bending each of the side plates so that each of the side plates is perpendicular to each of the main plates, thereby forming a plurality of frames; and connecting a joint portion of the main plate of each frame with another main plate of the frame The joints are connected, and a gap is formed between the joints of each of the side plates and the joints of adjacent side plates to form a frame body; each of the first side plates is bent, so that each of the first side plates is perpendicular to each other. A second side plate, thereby forming a plurality of brackets; and connecting the combined portion of the first side plate of each of the brackets with a combining portion of the side plate, and connecting the combined portion of the second side plate of each bracket with another The coupling portion of the coupling plate. For example, the manufacturing method of the box skeleton structure of claim 15, wherein each of the brackets is bonded to the frame by welding, and the solder is filled in a bonded portion of each of the brackets and a corresponding one of the bonded portions of the side plate. between. For example, the manufacturing method of the box skeleton structure of claim 15, wherein after cutting the metal plate, a plurality of reinforcing frame plates are obtained, and each of the reinforcing frame plates has a third side plate and a fourth side plate connected to each other. And each reinforcing frame plate has a connected portion on at least one of the third side plate and the fourth side plate; each third side plate is bent so that each third side plate is perpendicular to each fourth side Plate to form a plurality of reinforcing frames; connect the connected portion of the third side plate of each reinforcing frame to one of the main plates; each side plate has a connecting portion between the two connecting portions, and each fourth side plate The connected portion is connected to a connecting portion of the side plate. For example, the manufacturing method of the box skeleton structure of claim 17, wherein each of the reinforcing frames is bonded to the frame by welding, and the solder is filled between the connected portion of each of the reinforcing frames and a corresponding one of the main boards. And filled between the connected portion of each of the reinforcing frames and the corresponding one of the side plate's connecting portions. For example, the manufacturing method of the box skeleton structure of claim 15, wherein the frame material includes a first groove plate connected to a peripheral edge of the side plate; and the first groove plate is bent so that the first groove plate and the The corresponding side plate is clamped at an angle. For example, the method for manufacturing a box skeleton structure of claim 15, wherein at least one of the bracket plates includes a second groove plate, connecting one of the first edge plate and the second edge plate; and bending the second groove The slot plate makes the second slot plate be angled with the corresponding knitting plate.