Patent Publication Number: US-2016236316-A1

Title: Automatic adjustment device of belt sander conveyer

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a belt sander conveyer, and more particularly to an automatic adjustment device of a belt sander conveyer. 
     2. Description of the Prior Art 
     A belt sander is widely used, such as wooden products, furniture, and so on. The surface of wood has to be processed appropriately by sanding and polishing through the belt sander to enhance the overall appearance and fine modification. However, a conventional belt sander uses fixing members to assemble or disassemble the parts of the belt sander. After a period of time, the belt sander suffers a lot of wear and tear. It is very complicated to replace the consumable and the parts. The operator may waste a lot of time. This influences the progress of the work and lowers the work efficiency greatly. After a period of time for use, the belt sander conveyer will be worn caused by sanding, running of the parts for a long time, and other factors, it is necessary to replace the belt sander conveyer. The replacement of the belt sander conveyer uses many fixing member to disassemble and assemble the parts. After replacing the belt sander conveyer, the parallel position of the belt sander conveyer and the tension of the conveyer must be adjusted through the fixing members. Therefore, the replacement and adjustment of the conventional belt sander conveyor often waste a lot of time in operation to reduce work efficiency. These days, in the pursuit of an ideal and practical economy, it fails to meet the requirements of economic efficiency. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide an automatic adjustment device of a belt sander conveyer. Through the elastic adjustment device of the belt sander conveyer, the relative position of a first turning shaft and a conveying chassis can be adjusted quickly and the parallel orientation of the first turning shaft and a second turning shaft can be adjusted accordingly, such that the parallel orientation of the conveyer and the tension of the abrasive belt can be adjusted quickly. 
     In order to achieve the aforesaid object, the automatic adjustment device of the present invention comprises a conveying chassis, a first turning shaft assembly, a second turning shaft assembly, and an abrasive belt. The conveying chassis has a first axis and a second axis perpendicular to the first axis. The conveying chassis has a first section and a second section defined along two ends of the first axis. Two opposing side walls of the first section are formed with a groove, respectively. The groove is parallel to the first axis. The first turning shaft assembly is disposed at the first section of the conveying chassis. The first turning shaft assembly has two adjustment seats. The adjustment seats each have a protruding block. The protruding block is parallel to the first axis. The protruding block is secured in the groove. The adjustment seats are provided with a first adjustment member and a second adjustment member, respectively. The first adjustment member and the second adjustment member are movable in the direction of the first axis, respectively. The first adjustment member is connected with a first elastic member. The second adjustment member is connected with a second elastic member. The first elastic member and the second elastic member are connected with a first turning shaft. A first distance is defined between the first adjustment member and the first turning shaft. A first elasticity is stored toward the first turning shaft. A second distance is defined between the second adjustment member and the first turning shaft. A second elasticity is stored toward the first turning shaft. The second turning shaft assembly is disposed at the second section of the conveying chassis. The second turning shaft assembly is pivotally provided with a second turning shaft. The second turning shaft is connected with a motor to bring the second turning shaft to turn. The abrasive belt is fitted on the first turning shaft and the second turning shaft. 
     Through the adjustment of the prestressing force of the elastic adjustment device of the belt sander conveyer, the relative position of the first turning shaft and the conveying chassis can be adjusted quickly and the parallel orientation of the first turning shaft and the second turning shaft can be adjusted accordingly, such that the parallel orientation of the conveyer and the tension of the abrasive belt can be adjusted quickly to improve the processing precision of the workpiece. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of the present invention; 
         FIG. 2  is an exploded view of the present invention; 
         FIG. 3  is a sectional view of the present invention; 
         FIG. 4  is another sectional view of the present invention; and 
         FIG. 5  is a schematic view of the present invention when in use, showing adjustment of the conveyer. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings. 
       FIG. 1  is a perspective view of the present invention.  FIG. 2  is an exploded view of the present invention.  FIG. 3  is a sectional view of the present invention.  FIG. 4  is another sectional view of the present invention. The present invention discloses an automatic adjustment device of a belt sander conveyer. The automatic adjustment device of the belt sander conveyer comprises a conveying chassis  10 , a first turning shaft assembly  20 , a second turning shaft assembly  30 , and an abrasive belt  40 . 
     The conveying chassis  10  has a first axis  11  and a second axis  12  perpendicular to the first axis  11 . The conveying chassis  10  has a first section  111  and a second section  112  defined along two ends of the first axis  11 . Two opposing side walls  101  of the first section  111  are formed with a groove  13 , respectively. The groove  13  is parallel to the first axis  11 . 
     The first turning shaft assembly  20  is disposed at the first section  111  of the conveying chassis  10 . The first turning shaft assembly  20  has two adjustment seats  21 . The adjustment seats  21  each have a protruding block  211 . The protruding block  211  is parallel to the first axis  11 . The protruding block  211  is secured in the groove  13 . The adjustment seats  21  each have a first fixing board  212  and a second fixing board  213  in the direction of the second axis  12 . The first fixing board  212  is formed with a first through hole  214 . The second fixing board  213  is formed with a second through hole  215 . The adjustment seats  21  are provided with a first adjustment member  221  and a second adjustment member  222 , respectively. The first adjustment member  221  and the second adjustment member  222  are inserted through the first through hole  214  and the second through hole  215 , respectively. The first adjustment member  221  and the second adjustment member  222  can be moved in the direction of the first axis  11 , respectively. The first adjustment member  221  and the second adjustment member  222  are connected with a first elastic member  231  and a second elastic member  232 , respectively. The first elastic member  231  and the second elastic member  232  are connected with a first turning shaft  24 . A first distance is defined between the first adjustment member  221  and the first turning shaft  24 . A first elasticity is stored toward the first turning shaft  24 . The first elasticity is in the range of 20 kgw to 30 kgw. A second distance is defined between the second adjustment member  222  and the first turning shaft  24 . A second elasticity is stored toward the first turning shaft  24 . The second elasticity is in the range of 20 kgw to 30 kgw. One end of a first support rod  251  is inserted through the first adjustment member  221 . Another end of the first support rod  251  is sleeved with the first elastic member  231  and connected with the first turning shaft  24 . One end of a second support rod  252  is inserted through the second adjustment member  222 . Another end of the second support rod  252  is sleeved with the second elastic member  232  and connected with the second turning shaft  24 . A first washer  271  is provided between the first adjustment member  221  and the first elastic member  231 . A second washer  272  is provided between the second adjustment member  222  and the second elastic member  232 . In the present invention, two ends of the first turning shaft  24  are pivotally connected with a first shaft seat  261  and a second shaft seat  262 , respectively. The first shaft seat  261  is pivotally connected with the first support rod  251  and connected with the first elastic member  231 . The second shaft seat  262  is pivotally connected with the second support rod  252  and connected with the second elastic member  232 . The first shaft seat  261  and the second shaft seat  262  have a first plane  2611  and a second plane  2621  facing the first elastic member  231  and the second elastic member  232 , respectively. 
     The second turning shaft assembly  30  is disposed at the second section  112  of the conveying chassis  10 . The second turning shaft assembly  30  is pivotally provided with a second turning shaft  31 . The second turning shaft  31  is connected with a motor  32  to bring the second turning shaft  31  to turn. 
     The abrasive belt  40  is fitted on the first turning shaft  24  and the second turning shaft  31 . 
       FIG. 5  is a schematic view of the present invention when in use. After the belt sander conveyer adapted to contact with a workpiece suffers a certain wear and tear, it is necessary to replace a new conveyer in order to provide a better polishing processing. It is required to keep a better work efficiency for replacement of the belt sander conveyer. After replacement, it is also required to complete adjustment simply and quickly so as to reduce a waste of time to replace belt sander conveyer for enhancing work efficiency and increasing output. The automatic adjustment device of the belt sander conveyer of the present invention uses the grooves  13  at the two sides of the conveying chassis  10  to limit the protruding blocks  211  of the adjustment seats  21  so as to complete parallel orientation of the adjustment seats  21  easily and quickly. The adjustment seats  21  are locked to the two sides of the conveying chassis  10 , such that the first adjustment member  221  and the second adjustment member  222  are disposed at the two sides of the conveying chassis  10  in parallelism. 
     When it is necessary to replace the belt sander conveyer, the first adjustment member  221  and the second adjustment member  222  are selectively screwed in the adjustment seats  21  by the operator to release the forces pressing the first shaft seat  261  and the second shaft seat  262  biased by the first elastic member  231  and the second elastic member  232 , namely, to release the tension of the abrasive belt  40 . Thus, the operator can disassemble and replace the abrasive belt  40  easily. 
     After replacement of the abrasive belt  40 , the first adjustment member  221  and the second adjustment member  222  are selectively screwed out of the adjustment seats  21  so that the first shaft seat  261  and the second shaft seat  262  are biased by the first elastic member  231  and the second elastic member  232  again. After that, the first adjustment member  221  and the second adjustment member  222  are adjusted respectively, such that the first adjustment member  221  or the second adjustment member  222  is selectively screwed in or out of the adjustment seat  21 , namely, the prestressing forces of the first elastic member  231  and the second elastic member  232  to press against the first shaft seat  261  and the second shaft seat  262  can be adjusted so as to adjust the relative position of the first turning shaft  24  and the second turning shaft  31 . The belt sander conveyer can be adjusted, and the tension of the abrasive belt  40  can be adjusted accordingly. 
     Through the adjustment of the first adjustment member  221  as well as the second adjustment member  222 , the relative position of the first turning shaft  24  and the conveying chassis  10  can be adjusted quickly and the parallel orientation of the first turning shaft  24  and the second turning shaft  31  can be adjusted accordingly, such that the tension of the abrasive belt  40  can be adjusted quickly to reduce the time for replacement of the belt sander conveyer and to enhance the work efficiency. Besides, through the adjustment of the first adjustment member  221  as well as the second adjustment member  222 , the precision of the belt sander conveyer can be adjusted finely to improve the processing precision of the belt sander conveyer to the workpiece and the quality of the product. 
     The present invention uses the first adjustment member  221  to adjust the first elastic member  231  and the first elasticity and the second adjustment member  222  to adjust the second elastic member  232  and the second elasticity, enabling the first turning shaft  24  to get the same first elasticity and the second elasticity. The first turning shaft assembly  20  can be adjusted quickly, and the parallel orientation of the first turning shaft assembly  20  and the second turning shaft assembly  30  can be adjusted accordingly so as to adjust the tension of the abrasive belt  40  quickly. In addition, the first turning shaft  24  of the present invention is connected with the first adjustment member  221  through the first elastic member  231 , and the first turning shaft  24  is connected with the second adjustment member  222  through the second elastic member  232 , enabling the first turning shaft  24  to adjust the tension of the abrasive belt  40  quickly. Through the feature that the first elasticity and the second elasticity are in the range of 20 kgw to 30 kgw, the abrasive belt  40  can be flatter. 
     The grooves  13  of the conveying chassis  10  and the protruding blocks  211  of the adjustment seats  21  of the present invention are parallel to the first axis  11 . The first fixing boards  212  and the second fixing boards  213  of the adjustment seats  21  are disposed in the direction of the second axis  12 , such that the first adjustment member  221 , the first support rod  251 , the second adjustment member  222 , and the second support rod  252  are parallel to the first axis  11 . Therefore, it is convenient for the user to replace the abrasive belt  40  and to position the first turning shaft assembly  20  and the second turning shaft assembly  30  in parallelism. 
     Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.