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.