Bed frame, outer frame corner part, outer frame and processing method of bed frame
The connection of rectangular metal pipes through arc-shaped bends and docking solves the problems of unsightly appearance and low production efficiency at the corners of the bed frame, and achieves efficient and low-cost bed frame processing.
Patent Information
- Application Number
- CN202410094404.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2025-07-25
AI Technical Summary
The existing bed frame processing methods have problems such as unsightly corners, easy to harm users, low production efficiency and high cost.
The combined connection method of the first rectangular metal pipe and the second rectangular metal pipe is adopted to form corner parts through arc-shaped bends and butts, reducing the radius of rotation, simplifying the process, and improving aesthetics and safety.
It reduces processing difficulty, improves production efficiency and aesthetics, reduces machine operating format and cost, and enhances the structural strength of the bed frame.
Smart Images
Figure CN120360367A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field related to furniture products, and in particular to a bed frame structure, a processing method for a corner portion of an outer frame, a processing method for an outer frame, and a processing method for a bed frame. Background Art
[0002] As the most common furniture, beds generally include bed frames and mattresses, among which the bed frame plays an important role as the main supporting component. In order to enhance the structural strength of the bed frame and facilitate transportation, many bed frames are now made of steel hollow square tubes. Common methods for processing the outer frame of the bed frame are generally as follows: the first method is to cut the long hollow square tube into four short tubes, then cut the ends of the four short tubes into 45° angles and piece them together, and then connect them into an outer frame by welding. Although this method simplifies the connection method of the outer frame, the corners of the outer frame are right angles, which is not only unsightly but also easy to cause harm to the user. The second method is to make an elbow first, and then weld straight tubes at both ends of the elbow to form an outer frame; the third method is to use a long hollow square tube to make the outer frame by bending and welding. This processing method generally performs one or more 90° bends in the middle section of the long hollow square tube, so that the long square tube is processed into a frame shape. When directly bending a long hollow square tube, if the bending radius is too small, the square tube is prone to wrinkling and cracking. Therefore, it is necessary to increase the bending radius and appropriately increase the structural strength of the side wall at the corner, that is, it is necessary to pre-press the side wall at the corner to form a reinforced groove. The outer frame obtained by this processing method not only has a large corner radius, but also an uneven wall surface at the corner, which greatly affects the appearance.
[0003] The first solution mentioned above is a traditional model and is basically no longer used due to obvious problems; the second solution can be produced manually or automatically but the cost is high, and there are many splicing and welding processes, resulting in low efficiency, and the weld is outside the turning part, which is not easy to connect and requires high weld grinding; the third solution is used when automated production is adopted. When bending in the middle of the long hollow square tube, the machine operating range is also very large due to the large turning radius, the cost is high, the turning time is long and the efficiency is low. Summary of the invention
[0004] In order to improve efficiency and reduce costs, and to overcome at least one of the above-mentioned problems existing in the processing of the bed frame in the prior art, the present invention proposes a bed frame, including an outer frame, wherein the outer frame has at least one corner part, and the corner part includes a first rectangular metal pipe and a second rectangular metal pipe forming an included angle. The outer dimension specifications of the first rectangular metal pipe and the second rectangular metal pipe are the same, and both include an outer side and an inner side arranged oppositely, and an upper side and a lower side located between the outer side and the inner side; the upper side and the lower side at the end of the first rectangular metal pipe extend in an arc shape in the direction towards the end and gradually become smaller, the outer side at the end of the first rectangular metal pipe fits and extends along the upper side and the lower side and is connected to the inner side on the opposite side, and the port of the second rectangular metal pipe is docked to the inner side at the end of the first rectangular metal pipe to form a corner part, wherein the outer side at the end of the second rectangular metal pipe is smoothly transitionally connected to the arc-shaped outer side at the end of the first rectangular metal pipe.
[0005] Wherein, the outer frame is a frame member arranged on the periphery of the bed frame, and its size defines the outer dimension of the bed frame. In one embodiment, the outer frame is quadrilateral and includes at least a set of relatively arranged first rectangular metal pipes and a set of relatively arranged second rectangular metal pipes.
[0006] Wherein, the first rectangular metal pipe and the second rectangular metal pipe are profile members in the shape of long and hollow tubes, and their cross-sections are rectangular. Before being processed into the outer frame, the first rectangular metal pipe and the second rectangular metal pipe are two independent profile members. From the cross-section of the rectangular metal pipe, both rectangular metal pipes include an outer side, an inner side, an upper side and a lower side, and the four sides are defined by the space divided by the outer frame. The outer frame divides the space into an inner frame space, an outer frame space, an upper side space and a lower side space, and the four sides of the rectangular metal pipe face one of the corresponding four spaces respectively.
[0007] Wherein, the corner part refers to the structure in the shape of a corner formed by the connection of the end regions of the first rectangular metal pipe and the second rectangular metal pipe. When the outer frame is quadrilateral, the outer frame has four corner parts.
[0008] Wherein, the upper and lower sides of the end of the first rectangular metal pipe extend in an arc shape towards the end direction and gradually become smaller. The outer side of the end of the first rectangular metal pipe fits and extends along the upper and lower sides and is connected to the inner side of the opposite side. On the one hand, it means that the port part of the first rectangular metal pipe is blocked by the outer side extending in an arc shape, and the arc-shaped outer side can be a 90° circular arc, an elliptical arc or a wavy arc; on the other hand, it means that when the outer side extends in an arc shape, the upper and lower edges thereof can abut against the upper side and the lower side, so that a better fit and closure can be achieved between the outer side and the upper side and the lower side at the arc-shaped end position.
[0009] Wherein, the port of the second rectangular metal pipe is butted against the inner side of the end of the first rectangular metal pipe to form a corner part, and its meaning includes: butting and combining the second rectangular metal pipe and the first rectangular metal pipe to form a corner (90° or other preset angles) and connecting them, for example, by welding. For different corner angles, the port angles of the second rectangular metal pipe are arranged differently.
[0010] Wherein, the outer side of the end of the second rectangular metal pipe is smoothly transitionally connected with the arc-shaped outer side of the end of the first rectangular metal pipe. Its meaning includes that the outer side of the end of the second rectangular metal pipe and the arc-shaped outer side of the end of the first rectangular metal pipe can be directly butted and smoothly transitionally connected together, or there can be a gap, but from the outside, it looks smoothly transitional without burrs or obvious gaps. This is not only beautiful but also safe.
[0011] According to the above technical solution, compared with the prior art, the beneficial technical effects of the present invention are as follows: First, by independently bending the outer side of the end of the first rectangular metal pipe into an arc shape, compared with bending the whole rectangular metal pipe, the technical solution of the present invention greatly reduces the processing difficulty of bending, and also enables the outer side surface after bending to form a smooth arc surface, which not only reduces the harm to users, but also greatly improves the overall aesthetics of the product; compared with the bending scheme at the middle position of the traditional long strip hollow square pipe, in this scheme, when making the corner part, due to the small turning radius, the machine operation range is also small, the cost is low, the turning time is short and the efficiency is high.
[0012] Second, butting the separate second rectangular metal pipe against the end of the first rectangular metal pipe for fixed connection not only forms the corner part of the outer frame, but also directly forms the outer frame. The turning space in this butting and assembling process is small, the machine operation range is also small, the turning time is short and the efficiency is high. Moreover, adopting the butting scheme is also convenient for automatic assembly and production. Secondly, compared with the traditional scheme of first making elbows and then welding straight pipes at both ends of the elbows to form the outer frame, the process is significantly reduced, thus improving the production efficiency.
[0013] Third, an arc-shaped corner is formed at the end of the first rectangular metal pipe, achieving a transition through a small rounded corner within a limited width without the need for additional processing of the end of the second rectangular metal pipe. When installing the plate sleeve and the support plate, they can abut against the inner side edge of the first rectangular metal pipe, which is beneficial to increasing the number of the support plates to be mentioned later.
[0014] Fourth, after the bent outer side edge is connected to the inner side edge, the upper side edge, and the lower side edge, it can completely cover the end opening of the rectangular metal pipe, making the end of the first rectangular metal pipe have an integral effect, greatly improving the aesthetics of the product.
[0015] A further technical solution may also be that the outer side edge at the end of the first rectangular metal pipe extends and connects to the inner side edge on the opposite side and then continues to extend out a tail. The tail is bent inwardly, and the width of the tail is smaller than the width of the port of the second rectangular metal pipe. When the port of the second rectangular metal pipe is docked to the inner side edge at the end of the first rectangular metal pipe, the tail is inserted into the mouth of the port of the second rectangular metal pipe. This utilizes the tail to position the port of the second rectangular metal pipe. Not only can it prevent the second rectangular metal pipe from being easily offset during connection and fixation, but also it is beneficial to form a smooth connection between the outer side edge at the end of the second rectangular metal pipe and the outer side edge at the end of the first rectangular metal pipe, thereby improving the overall aesthetics of the product. Secondly, the arc-shaped outer side edge can also be welded and fixed at the position where the inner side of the tail intersects with the inner side edge, so that the welding point can be collected inside the outer side edge and covered and collected by the mouth of the port of the second rectangular metal pipe, improving the aesthetics and safety of the corner position.
[0016] A further technical solution may also be that in order to facilitate the insertion of the tail into the mouth of the port of the second rectangular metal pipe, the shoulders on both sides of the top of the tail are arc-shaped.
[0017] To further improve the structural strength of the outer frame, a diagonal bracing plate is further included. The two ends of the diagonal bracing plate are respectively fixedly connected to the first rectangular metal pipe and the second rectangular metal pipe and form a triangular body in combination with the corner part.
[0018] A further technical solution may also be that the outer frame has four such corner parts and thus presents a quadrilateral structure, including two relatively arranged first rectangular metal pipes and two relatively arranged second rectangular metal pipes; the bed frame further includes an intermediate keel, and the intermediate keel is a rectangular metal pipe with the same outer dimension specifications as the first rectangular metal pipe or the second rectangular metal pipe. The intermediate keel is fixedly connected inside the outer frame and is parallel to the first rectangular metal pipe or the second rectangular metal pipe.
[0019] A further technical solution may also be that both ends of the middle keel are respectively fixedly connected to the inner sides of the middle sections of a pair of the first rectangular metal pipes, and fixing holes are respectively arranged on the middle keel and a pair of second rectangular metal pipes on the left and right sides; the bed frame further includes a plate sleeve and a support plate. The plate sleeve is provided with fixing columns and insertion ports. The plate sleeves are respectively arranged on the middle keel and the second rectangular metal pipes. The plate sleeve is positioned and connected by means of inserting the fixing columns into the fixing holes. The support plate is bridged between the adjacent middle keel and the second rectangular metal pipe, and both ends thereof are inserted into the insertion ports of the plate sleeve to form the slat frame of the bed frame.
[0020] A further technical solution may also be that the bed frame further includes an auxiliary keel. The auxiliary keel is also a rectangular metal pipe but its outer dimension specification is smaller than that of the middle keel. The auxiliary keel is arranged in parallel between the middle keel and the second rectangular metal pipe, and both ends thereof are respectively fixedly connected to the inner sides of a pair of the first rectangular metal pipes. The auxiliary keel is arranged below the middle section position of the support plate for supporting the support plate when the support plate is deformed by a downward pressure.
[0021] A further technical solution may also be that the bed frame further includes support feet, and support foot mounting holes are also arranged on the outer frame and / or the middle keel. The support feet are connected to the outer frame and / or the middle keel by means of screwing to the support foot mounting holes.
[0022] The following is a specific description of the processing method for the corner part of the outer frame. The method is as follows: Use laser or plasma cutting to cut the first rectangular steel pipe to obtain a first rectangular metal pipe of a predetermined length. Then, use laser or plasma to cut a notch at the end of the first rectangular metal pipe. It includes cutting the upper side and the lower side of the end into arcs that gradually become smaller in the direction towards the end, and retaining the outer side. The arc-shaped upper side or lower side and the outer side form a V-shaped notch with an arc-shaped lower side of the V shape, and the outer side protrudes relative to the outermost side positions of the upper side and the lower side. The protruding length should at least ensure that when the outer side is bent along the upper side and the lower side, it can reach the inner side of the first rectangular metal pipe. Press and bend the outer side along the upper side and the lower side. When bending, make the distal end of the outer side able to abut against the inner side of the first rectangular metal pipe. Then, when the outer side is bent and pressed, weld and fix the outer side to the upper side, the lower side, or / and the inner side so that the end of the first rectangular metal pipe becomes an end with an arc-shaped outer surface. Use laser or plasma cutting to cut the first rectangular steel pipe to obtain a second rectangular metal pipe of a predetermined length. Connect the port of the second rectangular metal pipe to the inner side of the end of the first rectangular metal pipe, so that the outer side of the end of the second rectangular metal pipe is smoothly and transitionally connected to the arc-shaped outer side of the end of the first rectangular metal pipe, and weld them to form the corner part of the outer frame.
[0023] Furthermore, the protruding length of the outer side of the first rectangular metal pipe is guaranteed such that when the outer side of the first rectangular metal pipe is bent along the upper side and the lower side of the first rectangular metal pipe, it exceeds the inner side of the first rectangular metal pipe to form a protruding tail of 1 mm to 30 mm. After bending and pressing the outer side of the first rectangular metal pipe, weld at the inner corner part where the outer side and the inner side of the first rectangular metal pipe meet.
[0024] Furthermore, when using laser or plasma to cut the notch, use laser or plasma to cut the tail and the two shoulder parts on both sides of the top of the outer side of the first rectangular metal pipe to form arc-shaped tail side shoulders.
[0025] Furthermore, after using laser or plasma to cut the first rectangular metal pipe or the second rectangular metal pipe, use laser or plasma to cut a mating hole at a predetermined position on the pipe wall of the first rectangular metal pipe or the second rectangular metal pipe for mating use.
[0026] A processing method for an outer frame, using two first rectangular metal pipes processed by the processing method for the corner parts of the outer frame and two second rectangular metal pipes to be welded and assembled into an outer frame including four corner parts of the outer frame, wherein the two first rectangular metal pipes are horizontal bars arranged vertically, and the two second rectangular metal pipes are side bars arranged horizontally.
[0027] A processing method for a bed frame, using laser or plasma cutting to cut a first rectangular steel pipe to obtain an intermediate keel of a predetermined length, and using laser or plasma cutting to cut matching holes on the pipe wall of the intermediate keel; using laser or plasma cutting to cut a second rectangular steel pipe to obtain an auxiliary keel of a predetermined length, and using laser or plasma cutting to cut matching holes on the pipe wall of the auxiliary keel; welding the intermediate keel and the auxiliary keel to the inner side edges of the two first rectangular metal pipes of the outer frame at predetermined positions, the intermediate keel being arranged parallel to the second rectangular metal pipe, and the auxiliary keel being arranged parallel to the second rectangular metal pipe and located between the intermediate keel and the second rectangular metal pipe; or welding the intermediate keel and the auxiliary keel to the inner side edges of the two second rectangular metal pipes of the outer frame at predetermined positions, the intermediate keel being arranged parallel to the first rectangular metal pipe, and the auxiliary keel being arranged parallel to the first rectangular metal pipe and located between the intermediate keel and the first rectangular metal pipe; or welding the intermediate keel and the auxiliary keel to the inner side edges of the two second rectangular metal pipes of the outer frame at predetermined positions, the intermediate keel being arranged parallel to the first rectangular metal pipe, and the auxiliary keel being arranged parallel to the first rectangular metal pipe and located between the intermediate keel and the first rectangular metal pipe; welding a pre-prepared diagonal bracing plate to the first rectangular metal pipe and the second rectangular metal pipe at the corner part of the outer frame, so that the diagonal bracing plate forms a triangular body with the corner part of the outer frame.
[0028] Furthermore, it further includes a pre-prepared plate sleeve, a support plate and support feet, and the plate sleeve is provided with fixing columns and insertion openings; sleeving the plate sleeve on both ends of the support plate respectively, and then installing them to the intermediate keel and the second rectangular metal pipe respectively, or installing them to the intermediate keel and the first rectangular metal pipe respectively, by inserting the fixing columns on the plate sleeve into the matching holes; installing the support feet to the intermediate keel, the first rectangular metal pipe or the second rectangular metal pipe by screwing through the matching holes and tightening, to form the bed frame.
[0029] Due to the above characteristics and advantages of the present invention, it can be applied to the bed frame structure, the processing method for the corner parts of the outer frame, the processing method for the outer frame, and the processing method for the bed frame. Description of the Drawings
[0030] Figure 1 is the axonometric structure schematic diagram of the bed frame; Figure 2 is the exploded structure schematic diagram of the bed frame Figure 3 is the axonometric structure schematic diagram of the outer frame 2; Figure 4 is Figure 3 the partial enlarged structure schematic diagram at A in Figure 5 is the axonometric structure schematic diagram of the first rectangular metal pipe, showing the structure after end connection; Figure 6 is the end top view structure schematic diagram of the first rectangular metal pipe, showing the end cutting trajectory; Figure 7 is the end cross-sectional structure schematic diagram of the first rectangular metal pipe; Figure 8 is the axonometric structure schematic diagram of the second rectangular metal pipe. Specific implementation manners
[0031] The following further describes the bed frame structure applying the technical solution of the present invention, the processing method of the corner part of the outer frame 2, the processing method of the outer frame 2, and the processing method of the bed frame with reference to the accompanying drawings.
[0032] Except for the clearly described equivalent or alternative implementation manners, the following disclosed various implementation detail solutions can be selectively applied or combined and applied in one embodiment even if there is no direct association or synergy relationship in terms of functions.
[0033] Such as Figures 1 to 8As shown, a bed frame 1 proposed by the present invention includes an outer frame 2. The outer frame 2 has at least one corner part. The corner part includes a first rectangular metal pipe 3 and a second rectangular metal pipe 4 that form an included angle. The outer dimensions of the first rectangular metal pipe 3 and the second rectangular metal pipe 4 are the same, and both include opposite outer sides 11a (11b) and inner sides 12a (12b), and upper sides 13a (13b) and lower sides 14a located between the outer sides 11a (11b) and the inner sides 12a (12b). The upper side 13a and the lower side 14a at the end of the first rectangular metal pipe 3 extend in an arc shape in the direction towards the end and gradually become smaller. The outer side 11a at the end of the first rectangular metal pipe 3 fits and extends along the upper side 13a and the lower side 14a and is connected to the inner side 12a on the opposite side. The port of the second rectangular metal pipe 4 is docked to the inner side 12a at the end of the first rectangular metal pipe 3 to form a corner part. Among them, the outer side 11b at the end of the second rectangular metal pipe 4 is smoothly transitionally connected to the arc-shaped outer side 11b at the end of the first rectangular metal pipe 3.
[0034] As Figure 3 shown in Figure 4 As shown, the outer frame 2 is composed of four rectangular metal pipes connected end to end in sequence. The four rectangular metal pipes are respectively a pair of the first rectangular metal pipes 3 and a pair of the second rectangular metal pipes 4. Each of the first rectangular metal pipes 3 is connected to the end of the adjacent second rectangular metal pipe 4, and the outer frame 2 has four corner parts. The first rectangular metal pipe 3 and the second rectangular metal pipe 4 are both cut from rectangular metal pipes according to a predetermined length requirement. For the convenience of description, the first rectangular metal pipe 3 includes an outer side 11a, an inner side 12a, an upper side 13a, and a lower side 14a. The second rectangular metal pipe 4 includes an outer side 11b, an inner side 12b, an upper side 13b, and a lower side (not shown because it is blocked by the outer side 11b and the upper side 13b). The four sides are defined by the space divided by the outer frame 2. The outer frame 2 divides into an inner frame space, an outer frame space, an upper side space, and a lower side space. The four sides of the rectangular metal pipe respectively correspond to the four divided spaces.
[0035] In order to make an arc-shaped structure at the end of the first rectangular metal pipe 3, as Figures 5 to 7 shown in Figure 6The shaded part shown specifically cuts off the upper side 13a, the lower side 14a, and the inner side 12a on the end of the first rectangular metal pipe 3, and the outer side 11a is reserved to form a suspended wall 111. The specific cutting trajectory is as follows: taking a point at the end of the rectangular metal pipe 1 as the starting point K3, moving linearly parallel to the outer side 11a until reaching the bending point K2, and then moving obliquely towards the end along an arc trajectory of 90° until intersecting with the outer side 11a at the end point K1. The distance between the end point K1 and the end of the rectangular metal pipe is L1. When cutting along the cutting trajectory, the upper side 13a and the lower side 14a are cut into an arc shape adapted to the outer side 11a. In this way, by bending the suspended wall 111 of the outer side 11a, not only can the end of the outer side 11a be connected to the inner side 12a, but also the upper and lower edges of the outer side 11a can abut against the upper side 13a and the lower side 14a. In this embodiment, the outer side 11a (i.e., the suspended wall 111) of the end of the first rectangular metal pipe 3 is a 90° circular arc. Of course, in other equivalent embodiments, this arc can also be an elliptical arc or a wavy arc.
[0036] By independently bending the outer side 11a of the end of the first rectangular metal pipe 3, compared with bending the entire rectangular metal pipe 1, the technical solution of the present invention greatly reduces the processing difficulty at the bending part, and also enables the outer side 11a after bending to form an arc surface with a flat surface, which not only reduces the harm to the user, but also greatly improves the overall aesthetics of the product. After the end is connected, the outer side 11a can completely block the middle through hole of the rectangular metal pipe 1, making the end of the first rectangular metal pipe 3 have an integrated effect. An arc-shaped corner part is formed at the end of the first rectangular metal pipe 3, realizing a small-round-corner transition within a limited width, without the need to process the end of the second rectangular metal pipe 4. During the subsequent installation of the plate sleeve 7 and the support plate 8, they can abut against the inner side 12a of the first rectangular metal pipe 3, thereby increasing the installation quantity of the support plate 8 and improving the support effect of the bed frame. In addition, compared with the traditional bending scheme at the middle position of a long strip-shaped hollow square pipe, the production of the corner part in this scheme has a small turning radius, a small machine operation range, low cost, short turning time, and high efficiency. Secondly, compared with the traditional scheme of first making elbows and then welding straight pipes at both ends of the elbows to form an outer frame, the process is significantly reduced, thus improving the production efficiency.
[0037] A further technical solution can also be, such as Figure 6 And Figure 7As shown, the outer side 11a at the end of the first rectangular metal pipe 3 extends and connects to the inner side 12a on the opposite side and then continues to extend to form a tail 112. The tail 112 is bent inward. The width of the tail 112 is smaller than the width of the port of the second rectangular metal pipe 4. When the port of the second rectangular metal pipe 4 is docked onto the inner side 12a at the end of the first rectangular metal pipe 3, the tail 112 is inserted into the mouth of the port of the second rectangular metal pipe 4. This utilizes the tail 112 to position the port of the second rectangular metal pipe 4, not only making it difficult for the second rectangular metal pipe 4 to shift during connection and fixation, but also facilitating the smooth connection between the outer side 11b at the end of the second rectangular metal pipe 4 and the outer side 11a at the end of the first rectangular metal pipe 3, thereby improving the overall aesthetics of the product. Additionally, by providing the tail 112, it also facilitates the welding and fixation of the outer side 11a and the inner side 12a, as Figure 7 shown, the welding point is M, and at the same time, reducing the exposure of the welding point outside improves the overall aesthetics of the product.
[0038] To facilitate the insertion of the tail 112 into the mouth of the port of the second rectangular metal pipe 4, the shoulders on both sides at the top of the tail 112 are arc-shaped. Further, a rectangular notch can be obtained by removing the upper and lower edges of the tail 112 so that the width of the tail 112 is smaller than the port of the second rectangular metal pipe 4, facilitating the insertion of the tail 112 into the port of the second rectangular metal pipe 4.
[0039] To further improve the structural strength of the outer frame 2, the bed frame further includes a diagonal bracing plate 5. The two ends of the diagonal bracing plate 5 are respectively connected to the upper sides of the first rectangular metal pipe 3 and the second rectangular metal pipe 4 and form a triangular body in combination with the corner part. In this embodiment, the two ends of the diagonal bracing plate 5 are respectively connected to the lower side edges of the first rectangular metal pipe 3 and the second rectangular metal pipe 4, which can provide more space for installing the plate sleeve 7 later.
[0040] Further, it further includes an intermediate keel 6. The intermediate keel 6 is a rectangular metal pipe with the same outer dimension specifications as the first rectangular metal pipe 3 or the second rectangular metal pipe 4. The intermediate keel 6 is fixedly connected inside the outer frame 2 and is parallel to the first rectangular metal pipe 3. The two ends of the intermediate keel 6 are respectively fixedly connected to the inner sides of the middle sections of a pair of the first rectangular metal pipes 3. Of course, as an equivalent implementation, the intermediate keel 6 can also be rotated by an angle so that its two ends are respectively fixedly connected to the inner sides of the middle sections of a pair of the second rectangular metal pipes 4.
[0041] Further, fixing holes 61 are respectively arranged on the middle keel 6 and a pair of second rectangular metal pipes 4 on the left and right sides; the bed frame 1 further includes a plate sleeve 7 and a support plate 8. The plate sleeve 7 is provided with a fixing column 71 and an insertion port 72. The plate sleeve 7 is respectively arranged on the middle keel 6 and the second rectangular metal pipe 4. The plate sleeve 7 is positioned and connected by inserting the fixing column 71 into the fixing hole 61. The support plate 8 is bridged between the adjacent middle keel 6 and the second rectangular metal pipe 4, and both ends of the support plate 8 are inserted into the insertion port 72 of the plate sleeve 7 to form the slat frame of the bed frame 1.
[0042] Further, the bed frame 1 further includes an auxiliary keel 62. The auxiliary keel 62 is also a rectangular metal pipe, but its outer dimension specification is smaller than that of the middle keel 6. The auxiliary keel 62 is arranged in parallel between the middle keel 6 and the second rectangular metal pipe 4, and both ends of the auxiliary keel 62 are respectively fixed to the inner sides of a pair of the first rectangular metal pipes 3. The auxiliary keel 62 is arranged below the middle position of the support plate 8 to support the support plate 8 when the support plate 8 is deformed by a downward pressure.
[0043] Further, the bed frame 1 further includes support feet 9. Support foot mounting holes 63 are also arranged on the outer frame 2 and / or the middle keel 6. The support feet 9 are connected to the outer frame 2 and / or the middle keel 6 by screwing them to the support foot mounting holes 63.
[0044] The processing methods of the corner parts of the outer frame 2, the processing method of the outer frame 2, and the processing method of the bed frame 1 are specifically described below.
[0045] The processing method of the corner parts of the outer frame 2 is as follows: The first rectangular steel pipe is cut by laser or plasma to obtain the first rectangular metal pipe 3 with a predetermined length. Then, a notch is cut at the end of the first rectangular metal pipe 3 by laser or plasma. It includes cutting the upper side 13a and the lower side 14a at the end into arcs that gradually become smaller in the direction towards the end, and retaining the outer side 11a. The arc-shaped sides and the outer side 11a form a V-shaped notch with an arc-shaped lower side of the V shape, and the outer side 11a protrudes relatively beyond the outermost side positions of the upper side 13a and the lower side 14a. The protruding length ensures that when the outer side 11a is bent along the upper side 13a and the lower side 14a, it can reach the inner side 12a of the first rectangular metal pipe 3. The outer side 11a is bent and pressed along the upper side 13a and the lower side 14a. When bending, the distal end of the outer side 11a can be lapped on the inner side 12a of the first rectangular metal pipe 3. Then, when the outer side 11a is bent and pressed, the outer side 11a is welded and fixed to the upper side 13a, the lower side 14a, and / or the inner side 12a, so that the end of the first rectangular metal pipe 3 becomes an end with an arc-shaped outer surface. The second rectangular metal pipe 4 with a predetermined length is obtained by cutting the first rectangular steel pipe by laser or plasma. The port of the second rectangular metal pipe 4 is butted against the inner side 12a of the end of the first rectangular metal pipe 3, so that the outer side 11b at the end of the second rectangular metal pipe 4 is smoothly and transitionally connected to the arc-shaped outer side 11a at the end of the first rectangular metal pipe 3, and they are welded to form the corner part of the outer frame 2.
[0046] Furthermore, the protruding length of the outer side 11a of the first rectangular metal pipe 3 ensures that when the outer side 11a of the first rectangular metal pipe 3 is bent along the upper side 13a and the lower side 14a of the first rectangular metal pipe 3, it exceeds the inner side of the first rectangular metal pipe 3 to form a protruding tail 112 with a length of 1 mm to 30 mm. After bending and pressing the outer side 11a of the first rectangular metal pipe 3, welding is performed at the inner corner part where the outer side 11a and the inner side 12a of the first rectangular metal pipe 3 are joined, as Figure 7 shown, and the welding point is M.
[0047] Furthermore, when cutting the notch by laser or plasma, the two shoulders on both sides of the top of the tail 112 of the outer side 11a of the first rectangular metal pipe 3 are cut by laser or plasma to form arc-shaped tail side shoulders.
[0048] Further, after the first rectangular metal pipe 3 or the second rectangular metal pipe 4 is cut out by laser or plasma, mating holes for use are cut out on the pipe wall at a predetermined position of the first rectangular metal pipe 3 or the second rectangular metal pipe 4 by laser or plasma. Among them, the mating holes include the fixing holes 61 for mating with the fixing posts 71 of the plate sleeve 7 and the support foot mounting holes 63.
[0049] The processing method of the outer frame 2 is as follows: Two of the first rectangular metal pipes 3 and two of the second rectangular metal pipes 4 processed by using the processing method for the corner parts of the outer frame 2 are welded and joined to form an outer frame 2 including four corner parts of the outer frame 2, where two of the first rectangular metal pipes 3 are horizontal bars arranged vertically, and two of the second rectangular metal pipes 4 are side bars arranged horizontally.
[0050] The processing method of the bed frame 1 is as follows: The first type of rectangular steel pipe is cut by laser or plasma to obtain the intermediate keel 6 of a predetermined length, and mating holes for use are cut out on the pipe wall of the intermediate keel 6 by laser or plasma; the second type of rectangular steel pipe is cut by laser or plasma to obtain the auxiliary keel 62 of a predetermined length, and mating holes for use are cut out on the pipe wall of the auxiliary keel 62 by laser or plasma; the intermediate keel 6 and the auxiliary keel 62 are welded at predetermined positions on the inner side edges of the two first rectangular metal pipes 3 of the outer frame 2, the intermediate keel 6 is arranged parallel to the second rectangular metal pipe 4, and the auxiliary keel 62 is arranged parallel to the second rectangular metal pipe 4 and is located between the intermediate keel 6 and the second rectangular metal pipe 4; the pre-prepared diagonal bracing plates are welded on the first rectangular metal pipe 3 and the second rectangular metal pipe 4 at the corner parts of the outer frame 2 to form a triangular body with the corner parts of the outer frame 2. As another equivalent implementation manner, it may also be that the intermediate keel 6 and the auxiliary keel 62 are welded at predetermined positions on the inner side edges of the two second rectangular metal pipes 4 of the outer frame 2, the intermediate keel 6 is arranged parallel to the first rectangular metal pipe 3, and the auxiliary keel 62 is arranged parallel to the first rectangular metal pipe 3 and is located between the intermediate keel 6 and the first rectangular metal pipe 3.
[0051] Further, it further includes a pre-prepared plate sleeve 7, a support plate 8 and support feet 9. Fixed columns 71 and insertion ports 72 are provided on the plate sleeve 7; the plate sleeve 7 is respectively sleeved on both ends of the support plate 8, and then the fixed columns 71 on the plate sleeve 7 are inserted into the mating holes to be respectively installed on the middle keel 6 and the second rectangular metal pipe 4, or installed on the middle keel 6 and the first rectangular metal pipe 3; the support feet 9 are installed on the middle keel 6, the first rectangular metal pipe 3 or the second rectangular metal pipe 4 by means of screws passing through the mating holes and being tightened to form the bed frame 1.
[0052] In order to improve the corrosion resistance of the bed frame 1, after the welding of the bed frame 1 is completed, the welding line or welding points are first ground by a grinding wheel, so that the connection between the metal pipes and the connection at the arc-shaped corner form a surface that is smoothly connected to the side; then the oxide layer and impurities on the surface of the bed frame 1 are removed through a sandblasting and cleaning process; finally, a protective layer is formed on the outer surface of the bed frame 1 by painting or dipping.
Claims
1. Bed frame, comprising an outer frame, said outer frame having at least one corner portion, said corner portion including a first rectangular metal pipe and a second rectangular metal pipe forming an included angle, the outer dimensions of the first rectangular metal pipe and the second rectangular metal pipe being the same, and both including relatively arranged outer sides and inner sides and upper sides and lower sides located between the outer sides and the inner sides; characterized in that, The upper and lower side edges of the end of the first rectangular metal pipe extend in an arc shape towards the end and gradually become smaller. The outer side edge of the end of the first rectangular metal pipe extends along and adheres to the upper and lower side edges and is connected to the inner side edge of the opposite side. The port of the second rectangular metal pipe is docked to the inner side edge of the end of the first rectangular metal pipe to form the corner part, wherein the outer side edge of the end of the second rectangular metal pipe is smoothly transitionally connected to the arc-shaped outer side edge of the end of the first rectangular metal pipe.
2. The bed frame according to claim 1, characterized in that, After the outer side edge of the end of the first rectangular metal pipe extends and is connected to the inner side edge of the opposite side, it continues to extend out a tail. The tail is bent inwardly. The width of the tail is smaller than the width of the port of the second rectangular metal pipe. When the port of the second rectangular metal pipe is docked to the inner side edge of the end of the first rectangular metal pipe, the tail is inserted into the mouth of the port of the second rectangular metal pipe.
3. The bed frame according to claim 2, characterized in that, Both shoulders on both sides of the top of the tail are arc-shaped.
4. The bed frame according to claim 1, characterized in that, It further includes a diagonal bracing plate. Both ends of the diagonal bracing plate are fixedly connected to the first rectangular metal pipe and the second rectangular metal pipe respectively and form a triangular body in combination with the corner part.
5. The bed frame according to any one of claims 1 to 4, characterized in that, The outer frame has four such corner parts and thus is in a quadrilateral structure, including two relatively arranged first rectangular metal pipes and two relatively arranged second rectangular metal pipes; the bed frame further includes an intermediate keel. The intermediate keel is a rectangular metal pipe with the same outer dimension specifications as the first rectangular metal pipe or the second rectangular metal pipe. The intermediate keel is fixedly connected inside the outer frame and is parallel to the first rectangular metal pipe or the second rectangular metal pipe.
6. The bed frame according to claim 5, wherein, Both ends of the intermediate keel are fixedly connected to the inner sides of the middle sections of a pair of the first rectangular metal pipes respectively. Fixing holes are respectively provided on the intermediate keel and a pair of second rectangular metal pipes on the left and right sides; the bed frame further includes a plate sleeve and a support plate. The plate sleeve is provided with a fixing post and an insertion port. The plate sleeve is respectively provided on the intermediate keel and the second rectangular metal pipe. The plate sleeve is positioned and connected by means of inserting the fixing post into the fixing hole. The support plate straddles between the adjacent intermediate keel and the second rectangular metal pipe, and both ends of it are inserted into the insertion port of the plate sleeve to form the slat frame of the bed frame.
7. The bed frame according to claim 6, characterized in that, The bed frame further includes an auxiliary keel. The auxiliary keel is also a rectangular metal pipe but its outer dimension specifications are smaller than those of the intermediate keel. The auxiliary keel is arranged in parallel between the intermediate keel and the second rectangular metal pipe, and both ends of it are fixedly connected to the inner sides of a pair of the first rectangular metal pipes respectively. The auxiliary keel is arranged below the middle section position of the support plate and is used to support the support plate when the support plate is deformed by a downward pressure.
8. The bed frame according to claim 5, characterized in that, The bed frame further includes support feet. Support foot mounting holes are also provided on the outer frame and / or the intermediate keel. The support feet are connected to the outer frame and / or the intermediate keel by means of being screwed to the support foot mounting holes.
9. Processing method for the corner part of the outer frame, characterized in that, Including: The first rectangular steel pipe is cut by laser or plasma to obtain a first rectangular metal pipe of a predetermined length. Then, a notch is cut at the end of the first rectangular metal pipe by laser or plasma; this includes cutting the upper and lower side edges at the end into arcs that gradually become smaller in the direction towards the end, while retaining the outer side edge. The arc-shaped upper or lower side edge and the outer side edge form a V-shaped notch with an arc-shaped lower side of the V, and the outer side edge protrudes relatively beyond the outermost side edges of the upper and lower side edges. The protruding length is at least such that when the outer side edge is bent along the upper and lower side edges, it can reach the inner side edge of the first rectangular metal pipe; the outer side edge is pressed and bent along the upper and lower side edges. When bending, the distal end of the outer side edge can be lapped onto the inner side edge of the first rectangular metal pipe. Then, when the outer side edge is bent and pressed, the outer side edge is welded and fixed to the upper side edge, lower side edge, or / and inner side edge, so that the end of the first rectangular metal pipe becomes an end with an arc-shaped outer surface. The second rectangular steel pipe is cut by laser or plasma to obtain a second rectangular metal pipe of a predetermined length. The port of the second rectangular metal pipe is butted against the inner side edge of the end of the first rectangular metal pipe, so that the outer side edge of the end of the second rectangular metal pipe is smoothly and transitionally connected to the arc-shaped outer side edge of the end of the first rectangular metal pipe, and they are welded to form the outer frame corner part.
10. The processing method for the corner part of the outer frame according to claim 9, characterized in that, The protruding length of the outer side edge of the first rectangular metal pipe is ensured such that when the outer side edge of the first rectangular metal pipe is bent along the upper and lower side edges of the first rectangular metal pipe, it exceeds the inner side edge of the first rectangular metal pipe to form a protruding tail of 1 millimeter to 30 millimeters. After bending and pressing the outer side edge of the first rectangular metal pipe, welding is performed at the inner corner part where the outer side edge and the inner side edge of the first rectangular metal pipe meet.
11. The processing method for the corner part of the outer frame according to claim 10, characterized in that, When cutting the notch by laser or plasma, the two shoulders at the top of the tail of the outer side edge of the first rectangular metal pipe are cut by laser or plasma to form arc-shaped tail side shoulders.
12. The processing method for the corner part of the outer frame according to claim 9, characterized in that, After cutting the first rectangular metal pipe or the second rectangular metal pipe by laser or plasma, mating holes for mating use are cut by laser or plasma on the pipe wall at a predetermined position of the first rectangular metal pipe or the second rectangular metal pipe.
13. The processing method of the outer frame is characterized in that Two first rectangular metal pipes and two second rectangular metal pipes processed by the processing method of the outer frame corner part according to any one of claims 9 to 12 are welded and assembled to form an outer frame including four outer frame corner parts, where two of the first rectangular metal pipes are horizontal bars arranged vertically, and two second rectangular metal pipes are side bars arranged horizontally.
14. A processing method for a bedstead, characterized in that, The middle keel with a predetermined length is obtained by laser or plasma cutting the first rectangular steel pipe, and the matching holes for cooperation are cut on the pipe wall of the middle keel by laser or plasma cutting; the auxiliary keel with a predetermined length is obtained by laser or plasma cutting the second rectangular steel pipe, and the matching holes for cooperation are cut on the pipe wall of the auxiliary keel by laser or plasma cutting; the middle keel and the auxiliary keel are welded at a predetermined position on the inner side edges of the two first rectangular metal pipes of the outer frame processed by the processing method of the outer frame described in claim 13, the middle keel is arranged parallel to the second rectangular metal pipe, and the auxiliary keel is arranged parallel to the second rectangular metal pipe and is located between the middle keel and the second rectangular metal pipe; alternatively, the middle keel and the auxiliary keel are welded at a predetermined position on the inner side edges of the two second rectangular metal pipes of the outer frame processed by the processing method of the outer frame described in claim 13, the middle keel is arranged parallel to the first rectangular metal pipe, and the auxiliary keel is arranged parallel to the first rectangular metal pipe and is located between the middle keel and the first rectangular metal pipe; the pre-prepared diagonal bracing plates are welded on the first rectangular metal pipe and the second rectangular metal pipe at the corner part of the outer frame, so that the diagonal bracing plates form a triangular body with the corner part of the outer frame.
15. The processing method of the bedstead according to claim 14, characterized in that, It further includes pre-prepared plate sleeves, support plates and support feet, and fixing columns and insertion openings are provided on the plate sleeves; the plate sleeves are respectively sleeved on both ends of the support plates, and then are respectively installed on the middle keel and the second rectangular metal pipe, or installed on the middle keel and the first rectangular metal pipe by inserting the fixing columns on the plate sleeves into the matching holes; the support feet are installed on the middle keel, the first rectangular metal pipe or the second rectangular metal pipe by screwing the screws through the matching holes and tightening them to form the bed frame.