Abstract:
The present invention discloses a perforated sandpaper alignment device, which is used to accommodate and position perforated sandpapers having multiple through-holes thereon and comprises a seat. The seat has a base; the base has a column, which the perforated sandpapers are put around, and at least one fixing pole, which is arranged corresponding to one through-hole and used to position the perforated sandpapers. Thereby, multiple perforate sandpapers may be put on the seat and positioned by the seat. The present invention can make the storage of the perforated sandpapers easier. Further, the present invention enables the user to easily and precisely attach the perforated sandpaper to the grinding disc of a grinder.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates to a sandpaper alignment device, particularly to a perforated sandpaper alignment device. 
       BACKGROUND OF THE INVENTION 
       [0002]    For a conventional grinder with autonomous dust suction function, refer to a R.O.C. patent of Publication No. 339717, which proposed “Grinding Device with Autonomous Dust Suction Function”. The conventional device comprises: a body, a cover, an intake pipe, an exhaust pipe, and dust-suck pipe. The body has a pneumatic motor, and the pneumatic motor is coupled to a grinding disc with multiple dust-suck holes, a perforated sandpaper is attached to the grinding disc. The cover surrounds the rim of the grinding disc and has an opening used to exhaust the dust generated in the grinding operation. The intake pipe is installed on the surface of the body and connected with a compressed-air pipe, and the compressed-air pipe is connected with an air compressor; the intake pipe transfers the compressed air to drive the pneumatic motor. The exhaust pipe is installed on the surface of the body and near the intake pipe; the exhaust pipe has an outlet to exhaust the used compressed air. The dust-suck pipe has a sucking end connected to the abovementioned opening of the cover and an exhausting end connected to a vacuum sucker. Thereby, the dust generated in the grinding operation can be sucked away lest the dust harm the operator. 
         [0003]    However, in practical operation, it is hard to exactly integrate the perforated sandpaper with the grinding disc of the grinder. Refer to  FIG. 1  a diagram showing that a perforated sandpaper is being attached to a grinding disc. As shown in  FIG. 1 , the grinding disc  2  of a grinder  1  has multiple dust-suck holes  3 , and a perforated sandpaper  5  is attached to the grinding disc with a hook and loop fastener. The perforated sandpaper  5  has multiple through-holes  6  arranged corresponding to the dust-suck holes  3 . When the user is to attach a new perforated sandpaper  5  to the grinding disc  3 , he has to accurately align the perforated sandpaper  5  to the grinding disc  3  so that the dust-suck holes  3  of the grinding disc  2  can exactly match the through-holes  6  of the perforated sandpaper  5 . Thus, the dust-suck function of the grinder  1  can perform normally. From  FIG. 1 , it can be observed: it is very hard to make all the through-holes  6  coincide with all the corresponding dust-suck holes  3 . Even though the operator has carefully aligned the perforated sandpaper  5  to the grinding disc  2 , the mismatch between the through-holes  6  and the dust-suck holes  3  still occurs after the perforated sandpaper  5  has been attached to the grinding disc  2 . Thus, the perforated sandpaper  5  will be peeled off from and reattached to the grinding disc  2 . It may needs many times reattachments to successfully make the through-holes  6  coincide with the dust-suck holes  3 . Therefore, the conventional technology not only obviously inconveniences the user but also greatly reduces the working efficiency. 
       SUMMARY OF THE INVENTION 
       [0004]    The primary objective of the present invention is to provide a perforated sandpaper alignment device, which can meet the industry standards of perforated sandpapers, promote the convenience of perforated sandpaper application and solve the conventional problems mentioned above. 
         [0005]    The present invention proposes a perforated sandpaper alignment device, which is used to accommodate and position perforated sandpapers with multiple through-holes thereon and comprises a seat. The seat has a base; the base has at least one fixing pole, which is arranged corresponding to one through-hole and used to position the perforated sandpapers. Thereby, the present invention enables the user to easily and precisely attach the perforated sandpaper to the grinding disc of a grinder. Further, the present invention can effectively store multitudinous perforated sandpapers in order and in the way of conveniencing the succeeding usage. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]      FIG. 1  is a diagram showing that a perforated sandpaper is being attached to a grinding disc. 
           [0007]      FIG. 2  is a perspective view schematically showing the appearance of the perforated sandpaper alignment device according to the present invention. 
           [0008]      FIG. 3  is a diagram schematically showing that a sandpaper-changing device is incorporated with the present invention. 
           [0009]      FIG. 4  is a perspective view schematically showing the appearance of a sandpaper-changing device. 
           [0010]      FIG. 5  is an exploded view of a sandpaper-changing device. 
           [0011]      FIG. 6A  to  FIG. 6C  are diagrams schematically showing the cooperating operation of a sandpaper-changing device and the perforated sandpaper alignment device of the present invention. 
           [0012]      FIG. 7  is a diagram schematically showing another embodiment of the present invention. 
           [0013]      FIG. 8  is a diagram schematically showing further another embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0014]    The present invention pertains to a perforated sandpaper alignment device. To enable the present invention to be thoroughly understood, the structure and components of the present invention are to be described in detail below. Although the present invention does not exclude the technical details familiar to the persons skilled in the art, the components well known in the conventional technologies are not to be described herein lest the present invention be unnecessarily confined thereby. The preferred embodiments are to be described in detail below. However, the present invention is not to be limited by those preferred embodiments but can be extensively applied to other embodiments. 
         [0015]    The technical contents of the present invention are to be described in detail in cooperation the drawings below. Refer to  FIG. 2  a perspective view of the appearance of the present invention. As shown in  FIG. 2 , the perforated sandpaper alignment device of the present invention is used to position perforated sandpapers  5  with multiple through-holes  6  thereon. The perforated sandpaper alignment device of the present invention comprises a seat  10 , and the seat  10  has a base  13 . The base  13  has at least one fixing pole  11  installed corresponding to the through-hole  6  and used to position the perforated sandpaper  5 . The fixing pole  11  is vertically installed on the base  13  and fastened to the base  13  with a fastener  14 . Alternatively, the fixing pole  11  and the base  13  may be fabricated into a one-piece component. The base  13  also has at least one positioning hole  12  used to fix the seat  10 . 
         [0016]    Refer to from  FIG. 3  to  FIG. 6A . The perforated sandpaper alignment device of the present invention can cooperate with a sandpaper-changing device  20  to align a grinder  1  to a perforated sandpaper  5  and attach the perforated sandpaper  5  to the grinder  1 . The sandpaper-changing device  20  has a stage  21 , a cover  26 , an air vent  25  and at least one aligner  22  installed to the surface of the sandpaper-changing device  20 . The aligner  22  may be a rod fixed to the surface of the sandpaper-changing device  20  with at least one screw  221 . The cover  26  has a through-hole  23 . The sandpaper-changing device  20  has a movable member  30 . A limiting slot  31  and a limiting rib  24 , which are arranged corresponding to each other, are respectively formed on the movable member  30  and the inner wall of the sandpaper-changing device  20 . The arrangement of the limiting slot  31  and the limiting rib  24  may also be a reverse case of that mentioned above. An elastic element  40 , which may be a spring or a sponge, is arranged below the movable member  36  and inside the stage  21 . The seat  10  of the perforated sandpaper alignment device of the present invention is coupled to the movable member  30 . At least one positioning hole  12  and at least one positioning protuberance  32 , which are arranged corresponding to each other, are respectively formed on the seat  10  and the movable member  30 , and the arrangement of the positioning hole  12  and the positioning protuberance  32  may also be a reverse case of that mentioned above. 
         [0017]    Refer to from  FIG. 6A  to  FIG. 6C  diagrams schematically the cooperating operation of the sandpaper-changing device and the perforated sandpaper alignment device of the present invention. As shown in the drawings, the fixing pole  11  inserts the through-holes  6  of multiple perforated sandpapers  5 ; thus, the perforated sandpapers  5  are stacked on the seat  10  and positioned in the predetermined position. The aligner  22  of the sandpaper-changing device  20  is disposed with respect to the fixing pole  11 ; the aligner  22  may be disposed beside the fixing pole  11  or in the location 90 degrees with respect to the fixing pole  11 . The grinding disc  2  of the grinder  1  has an aligning mark (not shown in the drawings) corresponding to the aligner  22  of the sandpaper-changing device. As shown in  FIG. 6A , the user can align the aligning mark of the grinding disc  2  to the aligner  22  so that the dust-sucking holes  3  of the grinding disc  2  can exactly coincide with the through-holes  6  of the perforated sandpaper  5 . After the alignment is done, the user presses the grinder  1  down; the seat  10  is pushed down and further presses down the movable member  30  and the elastic element  40 . Thus, as shown in  FIG. 6B , the seat  10  recedes into the sandpaper-changing device  20  via the through-hole  23  of the cover  26 , and the grinding disc  2  contacts the topmost perforated sandpaper  5 , and the dust-sucking holes  3  of the grinding disc  2  can exactly coincide with the through-holes  6  of the perforated sandpaper  5 . Thus, the perforated sandpaper  5  is securely stuck to the grinding disc  2  via a hook and loop fastener, and the user can utilize the grinder  1  to perform a grinding work. As shown in  FIG. 6C , after the grinder  1  has been lifted from the seat  10 , the elastic element  40  restores the movable member  30  and the seat  10  back to the original position. As the limiting slot  31  and the limiting rib  24 , which are arranged corresponding to each other, are respectively formed on the movable member  30  and the inner wall of the sandpaper-changing device  20 , the movable member  30  and the seat  10  can only move in the vertical direction, and the alignment relationship between the grinding disc  2  and the perforated sandpaper  5  will not deviated during the movement of the movable member  30  and the seat  10 . Besides, the sandpaper-changing device  20  has at least air vent  25 . When the movable member  30  is moved downward or upward, the air can rapidly flow through the air vent to balance the air pressure lest the movement of the movable member  33  be retarded. 
         [0018]    In the present invention, the user can align the grinder  1  to the perforated sandpaper  5  with the aligner  22 ; then, the user presses down the grinder  1  to contact the perforated sandpaper  5  on the seat  10 ; thereby, the dust-sucking holes  3  of the grinding disc  2  can exactly coincide with the through-holes  6  of the perforated sandpaper  5  fast and precisely. Therefore, the present invention can greatly simplify the procedures of attaching the perforated sandpaper  5  to the grinder  1 . It is to be noted that the seat  10  is not installed to the movable member  30  fixedly. When the perforated sandpapers  5  are used up, the seat  10  can be pulled out from the through-hole  23 , and new perforated sandpapers  5  can be easily resupplied to the seat  10 . Further, the perforated sandpapers  5  may be stacked onto multiple seats  10  beforehand. Once the perforated sandpapers  5  are used up in one seat  10 , the spare seat  10  with new perforated sandpapers  5  can instantly replace the empty seat  10 . Furthermore, as shown in  FIG. 7  and  FIG. 8 , the numbers, sizes and positions of the fixing poles  11  of the seats  10 ,  10   a , and  10   b  may vary to meet different perforated sandpapers  5 ,  5   a , and  5   b  in the market. 
         [0019]    Those described above are only the preferred embodiments to clarify the present invention. However, it is not intended to limit the scope of the present invention. Any equivalent modification and variation according to the present invention is to be also included within the scope of the present invention. As described above, the present invention indeed has industrial utility and non-obviousness. Besides, as none similar product has been published or found in the market, the present invention also possesses novelty. Thus, the present invention meets the regulations for a patent. Therefore, the Inventor files the patent application for the present invention. It is to be greatly appreciated that the patent of the present invention be rapidly approved and licensed.