Arm folding device for sofa production

Abstract

The application discloses a handrail bending equipment for sofa production and relates to the field of sofa production.The handrail bending equipment comprises a rectangular frame, two supporting blocks and a bending assembly, further comprises an adjusting assembly capable of adjusting the distance between the two supporting blocks and a protection mechanism, the two supporting blocks are arranged in the interior of the rectangular frame and are slidably connected with the lower inner side wall of the rectangular frame, the opposite sides of the two supporting blocks are both arranged in an inclined manner, the adjusting assembly is arranged in the interior of the rectangular frame, two bidirectional threaded rods in the adjusting assembly are respectively arranged horizontally on the front and back sides of the interior of the rectangular frame, and the rod walls of each bidirectional threaded rod are threadedly connected with the two supporting blocks at both ends. The application can press and fix the two ends of the metal plate during the bending of the metal plate, can protect the surface of the plate, thereby preventing the metal plate from bouncing out and preventing the metal plate from flying out when the metal plate is broken, avoiding the harm to the operator, improving the safety and being convenient for people to use.

Description

Technical Field

[0001] This invention belongs to the field of sofa manufacturing technology, specifically an armrest bending device for sofa production. Background Technology

[0002] Sofas are now a necessity for many families. Sofas sold on the market are generally divided into three types: low-back sofas, high-back sofas, and ordinary sofas that fall between the two.

[0003] Currently, most sofas have armrests on the sides for people to hold onto while sitting, improving comfort. The internal frame of the armrest is sometimes made of bent metal sheet, which is usually done using bending equipment. However, in existing technology, when bending the metal sheet inside the armrest, due to the high rigidity of the metal sheet, a lot of elastic potential energy is stored in the metal sheet during the bending process. This can easily cause the metal sheet to pop out of the bending equipment, and sometimes it may even break, causing it to fly out and potentially injure the operator. Therefore, an armrest bending device for sofa production is proposed. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides an armrest bending device for sofa production, which effectively solves the problem that when bending the metal sheet inside the armrest, due to the high rigidity of the metal sheet, a lot of elastic potential energy is stored in the metal sheet during the bending process, making it easy to pop out of the bending device, and sometimes the metal sheet may even break, thus easily flying out and causing injury to the operator.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an armrest bending device for sofa production, comprising a rectangular frame, two support blocks, and a bending assembly, further comprising an adjustment assembly for adjusting the distance between the two support blocks and a protective mechanism. Both support blocks are disposed inside the rectangular frame and slidably connected to the lower inner sidewall of the rectangular frame, with the opposite sides of the two support blocks being inclined. The adjustment assembly is disposed inside the rectangular frame, and two bidirectional threaded rods in the adjustment assembly are respectively horizontally disposed on the front and rear sides inside the rectangular frame. The two ends of the rod wall of each bidirectional threaded rod are threadedly connected to the two support blocks. The protective mechanism includes two sets of anti-detachment components and two sets of bulletproof components. The anti-detachment components are respectively disposed on the left and right sidewalls of the rectangular frame, and the two sets of bulletproof components are respectively disposed on the two support blocks. Two U-shaped rods in the two sets of bulletproof components are rotatably disposed on the two support blocks.

[0006] Preferably, the two sets of anti-detachment components include two telescopic rods and two frames. The opposite ends of the two telescopic rods are rotatably connected to the left and right inner sidewalls of the rectangular frame respectively through first axle pins. The opposite ends of the two telescopic rods are rotatably connected to the two frames respectively through second axle pins. The interior of the two frames is provided with a fixing structure.

[0007] Preferably, the fixing structure includes a clamping plate and a first bolt. The clamping plate is vertically slidably disposed inside the frame. The first bolt is threadedly connected to the upper side wall of the frame, and the lower end of the first bolt is rotatably connected to the upper middle part of the clamping plate through a first bearing.

[0008] Preferably, each bulletproof component includes a U-shaped rod, a collar, a first annular ratchet, a second annular ratchet, a spring, and a baffle. The U-shaped rod is sleeved on the upper outer side of the support block, and the lower ends of the opposite sides of the U-shaped rod are rotatably connected to a first rotating shaft through a second bearing. The opposite ends of the two first rotating shafts are fixedly connected to the support block. The collar is located on the front side of the U-shaped rod and is slidably sleeved with the first rotating shaft. The first and second annular ratchets are fixedly connected to the collar and the opposite sides of the U-shaped rod, respectively, and the first annular ratchet can mesh with the second annular ratchet. The side wall of the first rotating shaft has multiple limiting grooves, and each of the multiple limiting grooves has a limiting slider slidably arranged inside. Each of the multiple limiting sliders is fixedly connected to the inner circular side wall of the collar. The baffle is located on the front side of the collar and is fixedly connected to the front end of the first rotating shaft. The spring is fixedly arranged between the collar and the baffle and is movably sleeved with the first rotating shaft.

[0009] Preferably, the spacing adjustment mechanism includes two bidirectional threaded rods, two sets of adjusting blocks, two sprockets, and a chain. The two sets of adjusting blocks are respectively fixedly installed on the front and rear sides of the two support blocks. The two ends of the rod wall of each bidirectional threaded rod are threadedly connected to the two corresponding adjusting blocks. The left and right ends of each bidirectional threaded rod are rotatably connected to the left and right ends of the rectangular frame through a third bearing. The left ends of the two bidirectional threaded rods extend to the outside of the rectangular frame and are fixedly connected to the two sprockets respectively. The two sprockets are driven by the chain. The right end of one of the bidirectional threaded rods extends to the outside of the rectangular frame and is fixedly connected to a handwheel.

[0010] Preferably, the inclined surfaces of the two support blocks are provided with a plurality of evenly distributed strip grooves, each strip groove is arranged longitudinally, and each strip groove is provided with a transmission roller inside, the front and rear ends of the transmission roller being rotatably connected to the front and rear sides of the strip groove through a second rotating shaft.

[0011] Preferably, the bending assembly includes a hydraulic rod and a bending head, the upper end of the hydraulic rod is fixedly connected to the upper inner sidewall of the rectangular frame, and the lower end of the hydraulic rod is detachably connected to the bending head.

[0012] Preferably, the lower end of the hydraulic rod is fixedly connected to a mounting plate, and the bending head is fixedly mounted on the lower side of the mounting plate by multiple fixing bolts.

[0013] The technical effects and advantages of this invention are as follows:

[0014] 1. When bending a metal sheet, the sheet to be bent is placed above two support blocks, with the sheet passing through two U-shaped rods. Two frames are fitted onto both ends of the sheet, and both ends are fixed by two sets of fixing structures. A hydraulic rod drives the bending head downward, thus bending the sheet. During bending, the middle of the sheet continuously bends downward. Under gravity, the two U-shaped rods rotate relative to each other around two first pivots and adhere to the surface of the sheet. The rotation of the U-shaped rods also drives the second annular ratchet to rotate. A spring continuously applies elastic force to the collar and the first annular ratchet, keeping the first and second annular ratchets engaged and preventing them from rotating in opposite directions. This ensures that the two U-shaped rods always press against the upper side of the sheet, preventing the sheet from popping out and flying out if it breaks, thus avoiding injury to the operator, improving safety, and facilitating use. Attached Figure Description

[0015] The figures are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the figures:

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the front structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0019] Figure 4 This is a side view of the frame structure of the present invention;

[0020] Figure 5 This is a side view of the support block of the present invention;

[0021] Figure 6 For the present invention Figure 5 A magnified structural diagram of part A in the middle;

[0022] Figure 7 This is a side view of the collar structure of the present invention;

[0023] Figure 8 This is a schematic diagram of the left side structure of the present invention.

[0024] In the diagram: 1. Rectangular frame; 2. Support block; 3. Bidirectional threaded rod; 4. U-shaped rod; 5. Telescopic rod; 6. Frame body; 7. Pressure plate; 8. First bolt; 9. Collar; 10. First annular ratchet; 11. Second annular ratchet; 12. Baffle; 13. Limiting slider; 14. Adjusting block; 15. Sprocket; 16. Chain; 17. Handwheel; 18. Transmission roller; 19. Hydraulic rod; 20. Press-down elbow; 21. Mounting plate; 22. Fixing bolt; 23. Spring. Detailed Implementation

[0025] This invention provides, for example Figure 1-8 The armrest bending equipment for sofa production shown includes a rectangular frame 1, two support blocks 2, and a bending assembly. It also includes an adjustment assembly for adjusting the distance between the two support blocks 2 and a protective mechanism. The two support blocks 2 are both located inside the rectangular frame 1 and are slidably connected to the lower inner side wall of the rectangular frame 1. The two sides of the two support blocks 2 are inclined. The adjustment assembly is located inside the rectangular frame 1, and the two bidirectional threaded rods 3 in the adjustment assembly are respectively arranged horizontally on the front and rear sides inside the rectangular frame 1. The two ends of the rod wall of each bidirectional threaded rod 3 are respectively threadedly connected to the two support blocks 2. The protective mechanism includes two sets of anti-detachment components and two sets of bulletproof components. The anti-detachment components are respectively located on the left and right side walls of the rectangular frame 1, and the two sets of bulletproof components are respectively located on the two support blocks 2. The two U-shaped rods 4 in the two sets of bulletproof components are respectively rotatably located on the two support blocks 2.

[0026] like Figure 2 - Figure 4 As shown, the two sets of anti-detachment components include two telescopic rods 5 and two frames 6. The opposite ends of the two telescopic rods 5 are rotatably connected to the left and right inner side walls of the rectangular frame 1 respectively through the first axle pin. The opposite ends of the two telescopic rods 5 are rotatably connected to the two frames 6 respectively through the second axle pin. The interior of the two frames 6 is provided with a fixing structure.

[0027] Meanwhile, the fixing structure includes a clamping plate 7 and a first bolt 8. The clamping plate 7 can be vertically slidably installed inside the frame 6. The first bolt 8 is threadedly connected to the upper side wall of the frame 6, and the lower end of the first bolt 8 is rotatably connected to the upper middle part of the clamping plate 7 through a first bearing.

[0028] When bending the metal sheet, place the metal sheet above the two support blocks 2, put the two frames 6 on the two ends of the metal sheet respectively, and rotate the two first bolts 8 in sequence so that the two clamping plates 7 press and fix the two ends of the metal sheet respectively, thereby preventing the metal sheet from breaking and flying out when bending.

[0029] like Figure 2, Figure 3 , Figure 5 - Figure 7 As shown, each bulletproof assembly includes a U-shaped rod 4, a collar 9, a first annular ratchet 10, a second annular ratchet 11, a spring 23, and a baffle 12. The U-shaped rod 4 is sleeved on the upper outer side of the support block 2, and the lower ends of the opposite sides of the U-shaped rod 4 are rotatably connected to the first rotating shafts through the second bearings. The opposite ends of the two first rotating shafts are fixedly connected to the support block 2. The collar 9 is located on the front side of the U-shaped rod 4 and is slidably sleeved on the first rotating shaft. The first annular ratchet 10 and the second annular ratchet 11 are fixedly connected to the collar 9 and the opposite sides of the U-shaped rod 4, respectively, and the first annular ratchet 10 can mesh with the second annular ratchet 11. The side wall of the first rotating shaft has multiple limiting grooves, and the interior of each limiting groove is slidably equipped with a limiting slider 13. The multiple limiting sliders 13 are fixedly connected to the inner circular side wall of the collar 9. The baffle 12 is located on the front side of the collar 9 and is fixedly connected to the front end of the first rotating shaft. The spring 23 is fixedly installed on the collar. The collar 9 and the baffle 12 are movably sleeved together with the first rotating shaft. When the metal plate is placed, it passes through the two U-shaped rods 4. During the bending process, the middle of the metal plate continues to bend downward. Under the action of gravity, the two U-shaped rods 4 will rotate relative to each other around the two first rotating shafts and adhere to the surface of the metal plate. When the U-shaped rods 4 rotate, they also drive the second annular ratchet 11 to rotate. The spring 23 can continuously apply elastic force to the collar 9 and the first annular ratchet 10, so that the first annular ratchet 10 and the second annular ratchet 11 are continuously engaged, preventing the second annular ratchet 11 and the U-shaped rods 4 from rotating in opposite directions. This allows the two U-shaped rods 4 to always press on the upper side of the metal plate, thereby preventing the metal plate from popping out and preventing it from flying out when the metal plate breaks. When it is necessary to rotate the U-shaped rods 4 upward, simply pull the collar 9 outward to separate the first annular ratchet 10 from the second annular ratchet 11, and the U-shaped rods 4 can be rotated upward.

[0030] like Figure 2 , Figure 3 and Figure 8As shown, the spacing adjustment mechanism includes two bidirectional threaded rods 3, two sets of adjusting blocks 14, two sprockets 15, and a chain 16. The two sets of adjusting blocks 14 are fixedly installed on the front and rear sides of the two support blocks 2 respectively. The two ends of the rod wall of each bidirectional threaded rod 3 are threadedly connected to the two corresponding adjusting blocks 14 respectively, and the left and right ends of each bidirectional threaded rod 3 are rotatably connected to the left and right ends of the rectangular frame 1 respectively through a third bearing. The left ends of the two bidirectional threaded rods 3 extend to the outside of the rectangular frame 1 and are fixedly connected to the two sprockets 15 respectively. The two sprockets 15 are mutually driven by the chain 16. The right end of one of the bidirectional threaded rods 3 extends to the outside of the rectangular frame 1 and is fixedly connected to a handwheel 17. Rotating the handwheel 17 can drive one of the bidirectional threaded rods 3 to rotate, and the two bidirectional threaded rods 3 can be rotated simultaneously through the two sprockets 15 and the chain 16, so that the two sets of adjusting blocks 14 can move relative to each other, and the distance between the two support blocks 2 can be adjusted, which is convenient for bending metal plates with different arc sizes.

[0031] like Figure 2 and Figure 5 As shown, the inclined surfaces of the two support blocks 2 are provided with multiple evenly distributed strip grooves. Each strip groove is arranged longitudinally, and each strip groove is provided with a transmission roller 18. The front and rear ends of the transmission roller 18 are rotatably connected to the front and rear sides of the strip groove through a second rotating shaft, which can reduce the friction between the metal plate and the inclined surfaces of the two support blocks 2.

[0032] like Figure 2 and Figure 3 As shown, the bending assembly includes a hydraulic rod 19 and a bending head 20. The upper end of the hydraulic rod 19 is fixedly connected to the upper inner side wall of the rectangular frame 1, and the lower end of the hydraulic rod 19 is detachably connected to the bending head 20. At the same time, a mounting plate 21 is fixedly connected to the lower end of the hydraulic rod 19. The bending head 20 is fixedly mounted on the lower side of the mounting plate 21 by multiple fixing bolts 22, which facilitates the disassembly and replacement of the bending head 20.

[0033] The working principle of this invention is as follows: When bending a metal sheet, the sheet to be bent is placed above two support blocks 2, and the sheet passes through two U-shaped rods 4. Two frames 6 are respectively fitted onto both ends of the metal sheet, and both ends of the sheet are fixed by two sets of fixing structures. The bending head 20 is moved downward by the hydraulic rod 19, thereby bending the metal sheet. During the bending process, the middle of the metal sheet continues to bend downward, and the two U-shaped rods 4 rotate relative to each other around the two first rotating axes under the action of gravity and fit together. On the surface of the metal sheet, the U-shaped rod 4 rotates, which in turn drives the second annular ratchet 11 to rotate. The spring 23 continuously applies elastic force to the collar 9 and the first annular ratchet 10, keeping the first annular ratchet 10 continuously engaged with the second annular ratchet 11. This prevents the second annular ratchet 11 and the U-shaped rod 4 from rotating in opposite directions, thus ensuring that the two U-shaped rods 4 are always pressed against the upper side of the metal sheet. This prevents the metal sheet from popping out and from flying out when it breaks, avoiding injury to the operator, improving safety, and making it easier for people to use.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An armrest bending machine for sofa production, characterized in that: The device includes a rectangular frame (1), two support blocks (2) and a bending assembly, as well as an adjustment assembly and a protective mechanism for adjusting the distance between the two support blocks (2). The two support blocks (2) are both located inside the rectangular frame (1) and are slidably connected to the lower inner sidewall of the rectangular frame (1). The two support blocks (2) are inclined on opposite sides. The adjustment assembly is located inside the rectangular frame (1), and the two bidirectional threaded rods (3) in the adjustment assembly are respectively arranged horizontally on the front and rear sides inside the rectangular frame (1). The two ends of the rod wall of each bidirectional threaded rod (3) are respectively threaded to the two support blocks (2). The protective mechanism includes two sets of anti-detachment assemblies and two sets of bulletproof assemblies. The anti-detachment assemblies are respectively located on the left and right sidewalls of the rectangular frame (1). The two sets of bulletproof assemblies are respectively located on the two support blocks (2), and the two U-shaped rods (4) in the two sets of bulletproof assemblies are respectively rotatably located on the two support blocks (2). The two sets of anti-detachment components include two telescopic rods (5) and two frames (6). The opposite ends of the two telescopic rods (5) are rotatably connected to the left and right inner walls of the rectangular frame (1) respectively through the first shaft pin. The opposite ends of the two telescopic rods (5) are rotatably connected to the two frames (6) respectively through the second shaft pin. The interior of the two frames (6) is provided with a fixing structure. The fixing structure includes a clamping plate (7) and a first bolt (8). The clamping plate (7) can be vertically slidably disposed inside the frame (6). The first bolt (8) is threadedly connected to the upper side wall of the frame (6), and the lower end of the first bolt (8) is rotatably connected to the upper middle part of the clamping plate (7) through a first bearing. Each bulletproof assembly includes a U-shaped rod (4), a collar (9), a first annular ratchet (10), a second annular ratchet (11), a spring (23), and a baffle (12). The U-shaped rod (4) is sleeved on the upper outside of the support block (2), and the lower ends of the opposite sides of the U-shaped rod (4) are rotatably connected to the first rotating shafts through the second bearings. The opposite ends of the two first rotating shafts are fixedly connected to the support block (2). The collar (9) is located on the front side of the U-shaped rod (4) and is slidably sleeved with the first rotating shafts. The first annular ratchet (10) and the second annular ratchet (11) are respectively The first rotating shaft is fixedly connected to the opposite sides of the collar (9) and the U-shaped rod (4), and the first annular ratchet (10) can mesh with the second annular ratchet (11). The side wall of the first rotating shaft is provided with multiple limiting grooves, and the interior of each of the multiple limiting grooves is provided with a limiting slider (13). The multiple limiting sliders (13) are fixedly connected to the inner circular side wall of the collar (9). The baffle (12) is provided on the front side of the collar (9) and fixedly connected to the front end of the first rotating shaft. The spring (23) is fixedly provided between the collar (9) and the baffle (12) and is movably sleeved on the first rotating shaft.

2. The armrest bending equipment for sofa production according to claim 1, characterized in that: The spacing adjustment mechanism includes two bidirectional threaded rods (3), two sets of adjustment blocks (14), two sprockets (15) and a chain (16). The two sets of adjustment blocks (14) are fixedly installed on the front and rear sides of the two support blocks (2). The two ends of the rod wall of each bidirectional threaded rod (3) are threadedly connected to the two corresponding adjustment blocks (14). The left and right ends of each bidirectional threaded rod (3) are rotatably connected to the left and right ends of the rectangular frame (1) through a third bearing. The left ends of the two bidirectional threaded rods (3) extend to the outside of the rectangular frame (1) and are fixedly connected to the two sprockets (15) respectively. The two sprockets (15) are driven to each other through the chain (16). The right end of one of the bidirectional threaded rods (3) extends to the outside of the rectangular frame (1) and is fixedly connected to a handwheel (17).

3. The armrest bending equipment for sofa production according to claim 1, characterized in that: The inclined surfaces of the two support blocks (2) are provided with multiple uniformly distributed strip grooves. Each strip groove is arranged longitudinally, and each strip groove is provided with a transmission roller (18). The front and rear ends of the transmission roller (18) are rotatably connected to the front and rear sides of the strip groove through a second rotating shaft.

4. The armrest bending equipment for sofa production according to claim 3, characterized in that: The bending assembly includes a hydraulic rod (19) and a bending head (20). The upper end of the hydraulic rod (19) is fixedly connected to the upper inner wall of the rectangular frame (1), and the lower end of the hydraulic rod (19) is detachably connected to the bending head (20).

5. The armrest bending equipment for sofa production according to claim 4, characterized in that: The lower end of the hydraulic rod (19) is fixedly connected to the mounting plate (21), and the bending head (20) is fixedly mounted on the lower side of the mounting plate (21) by multiple fixing bolts (22).

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