Search

CN-224223677-U - Jig assembly for split backrest

CN224223677UCN 224223677 UCN224223677 UCN 224223677UCN-224223677-U

Abstract

The application discloses a jig assembly for a split backrest, which comprises an upper bracket jig and a lower bracket jig, wherein the upper bracket jig comprises a first bottom plate, a first clamping mechanism and a first clamping table, the first clamping mechanism and the first clamping table are arranged on the first bottom plate, the first clamping mechanism is configured to clamp a sliding part on the first clamping table, the lower bracket jig comprises a second bottom plate, a second clamping mechanism and the second clamping table are arranged on the second bottom plate, the second clamping mechanism is configured to clamp a supporting part to the groove wall of a chute to be attached to the second clamping table, and the width of the second clamping table approaches to the width of the sliding part, so that the width of the chute after clamping is matched with the width of the sliding part. The jig assembly for the split backrest, provided by the application, has the advantages that the sliding part and the supporting part are clamped by the jig assembly, the shapes and the sizes of the sliding part and the supporting part before and after cooling can be kept consistent, the width of the sliding groove is matched with the width of the sliding part, and the upper bracket and the lower bracket can be smoothly assembled, so that the product quality is ensured, and the yield is improved.

Inventors

  • LIAO QING
  • YUAN SHIDONG
  • WAN FUJUN

Assignees

  • 永艺家具股份有限公司

Dates

Publication Date
20260512
Application Date
20250529

Claims (10)

  1. 1. The jig assembly for the split backrest is characterized by comprising an upper bracket jig (1) and a lower bracket jig (2), wherein the upper bracket jig (1) comprises a first bottom plate (110) and a first clamping mechanism and a first clamping table (120) which are arranged on the first bottom plate (110), the first clamping table (120) is configured to be supported at the bottom of a sliding part (320), the first clamping mechanism is configured to clamp the sliding part (320) to the first clamping table (120), the lower bracket jig comprises a second bottom plate (210) and a second clamping mechanism and a second clamping table (220) which are arranged on the second bottom plate (210), the second clamping table (220) is configured to be supported at the bottom of a supporting part (410), the second clamping mechanism is configured to clamp the supporting part (410) to the groove wall of a sliding groove (411) to be attached to the second clamping table (220), and the width of the second clamping table (220) approaches to the width of the sliding part (320) so that the width of the sliding part (320) is matched with the width of the sliding part (411).
  2. 2. The jig assembly for a split backrest according to claim 1, wherein a top end of the first clamping table (120) is recessed downward to form a clamping groove (121), the clamping groove (121) is configured to accommodate the sliding portion (320), and a width of the clamping groove (121) approaches a width of the sliding portion (320).
  3. 3. The jig assembly for a split backrest according to claim 1, wherein the second clamping table (220) is a boss-like structure with a narrow upper side and a wide lower side, and comprises a clamping portion (221) with a narrow upper side, the clamping portion (221) is configured to fit a groove wall of the sliding groove (411), and the height of the clamping portion (221) approaches the thickness of the sliding portion (320).
  4. 4. A jig assembly for a split backrest according to claim 3, characterized in that the top end of the first clamping table (120) is recessed downward to form a clamping groove (121), the clamping groove (121) is configured to accommodate the sliding portion (320), and the depth of the clamping groove (121) approaches the thickness of the sliding portion (320).
  5. 5. The jig assembly for a split backrest according to claim 1, wherein the rear side of the second clamping table (220) extends upward to form a positioning portion (222), the positioning portion (222) being configured as a stopper support portion (410).
  6. 6. The jig assembly for a split backrest of claim 1, wherein the first clamping mechanism comprises a plurality of first vertical clamps (130), the first vertical clamps (130) configured to press down on a slide (320) to engage the first clamping stage (120).
  7. 7. The jig assembly for a split backrest of claim 1, wherein the first clamping mechanism comprises four sets of horizontal clamps (140) and a third clamping stage (150), the horizontal clamps (140) being configured to laterally compress a frame connection (310) to engage the third clamping stage (150).
  8. 8. The jig assembly for a split backrest according to claim 7, wherein the horizontal clamp (140) includes a bayonet (141), a locking hole (151) is concavely formed at a side of the third clamping stage (150) adjacent to the bayonet (141), and the bayonet (141) is configured to pass through a connection hole (311) on a frame connection portion (310) and to be clamped into the locking hole (151) such that the frame connection portion (310) and the first base plate (110) are relatively fixed.
  9. 9. The jig assembly for a split backrest of claim 1, wherein the second clamping mechanism comprises a plurality of second vertical clamps (230), the second vertical clamps (230) configured to press down on a support (410) to fit the second clamping stage (220).
  10. 10. The jig assembly for the split backrest according to claim 1, wherein the second clamping mechanism comprises air cylinders (240) symmetrically arranged at the left side and the right side of the second clamping table (220), and the air cylinders (240) are configured to drive a push rod (241) to move left and right and drive a pressing plate (242) on the push rod (241) to transversely press the left side and the right side of the supporting portion (410) to be attached to the side wall of the second clamping table (220).

Description

Jig assembly for split backrest Technical Field The utility model relates to the technical field of tool clamps, in particular to a jig assembly for a split backrest. Background The office chair is a common seat in an office place, and in order to facilitate packaging and transportation, all parts of the office chair can be manufactured separately in the production process. Such as a backrest for supporting a user's back, which generally includes a mesh frame for covering the mesh, an upper bracket for supporting the mesh frame, and a lower bracket for engaging the upper bracket and the seat pan. After the mesh framework, the upper bracket and the lower bracket are separately manufactured, the mesh framework, the upper bracket and the lower bracket are assembled together to form the backrest of the office chair. As shown in fig. 1, the upper bracket 3 includes four frame connecting portions 310 formed by extending forward, the four frame connecting portions 310 are respectively used for connecting four opposite angles of the mesh frame, connecting holes 311 are formed in the left and right directions of the frame connecting portions 310 along the left and right directions, and the frame connecting portions 310 are connected with the mesh frame through the connecting holes 311 and screws. The lower bracket 4 is of an L-shaped structure and comprises an upper vertical supporting portion 410, a vertical sliding groove 411 is concavely formed in the supporting portion 410, the upper bracket 3 further comprises a lower plate-shaped sliding portion 320, the sliding portion 320 is connected to the supporting portion 410 in a sliding mode along the vertical direction through the sliding groove 411, and then the upper bracket 3 is driven to slide up and down relative to the lower bracket 4, namely the height of the office chair backrest is adjusted, and the adjusting degree of freedom is high. In the prior art, an upper bracket and a lower bracket are usually molded in an injection molding mode, and the upper bracket and the lower bracket are required to be naturally cooled at room temperature after being molded. However, since the internal temperature of the injection molding is higher than the external temperature during cooling, the upper bracket and the lower bracket are easy to generate thermal shrinkage, so that the sliding part and the supporting part are easy to deform and warp after cooling, the shape and the size of the sliding part cannot be matched with the sliding groove, the upper bracket cannot be smoothly assembled to the lower bracket, and the product is unqualified. Therefore, if the upper bracket and the lower bracket are ensured to be assembled smoothly after being cooled, the main problem to be solved at present is solved. Disclosure of Invention In view of the above-mentioned drawbacks or shortcomings in the prior art, it is desirable to provide a jig assembly for a split backrest, in which a sliding part is clamped to a first clamping table by a first clamping mechanism, and a supporting part is clamped to a groove wall of a chute by a second clamping mechanism to be attached to a second clamping table, so that the shapes and sizes of the sliding part and the supporting part before and after cooling can be kept consistent, and the width of the second clamping table approaches to the width of the sliding part, so that the width of the chute after cooling is matched with the width of the sliding part, that is, the sliding part can be smoothly clamped into the chute, and an upper bracket and a lower bracket can be smoothly assembled, thereby ensuring the product quality and improving the yield. The effect of the utility model is realized as follows: The application provides a jig assembly for a split backrest, which comprises an upper bracket jig and a lower bracket jig, wherein the upper bracket jig comprises a first bottom plate, a first clamping mechanism and a first clamping table, the first clamping mechanism and the first clamping table are arranged on the first bottom plate, the first clamping table is configured to be supported at the bottom of a sliding part, the first clamping mechanism is configured to clamp the sliding part on the first clamping table, the lower bracket jig comprises a second bottom plate, a second clamping mechanism and the second clamping table are arranged on the second bottom plate, the second clamping table is configured to be supported at the bottom of a supporting part, the second clamping mechanism is configured to clamp the supporting part to the groove wall of a sliding groove to be attached to the second clamping table, and the width of the second clamping table is close to the width of the sliding part, so that the width of the sliding groove after clamping is matched with the width of the sliding part. Further, the top end of the first clamping table is recessed downwards to form a clamping groove, the clamping groove is configured to accommodate the slid