CN111604766A

CN111604766A - Automatic feeding device for polishing abrasive paper

Info

Publication number: CN111604766A
Application number: CN202010605014.1A
Authority: CN
Inventors: 赵敏杰
Original assignee: ZHEJIANG HECHUAN TECHNOLOGY CO LTD
Current assignee: ZHEJIANG HECHUAN TECHNOLOGY CO LTD
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-09-01

Abstract

The invention discloses an automatic feeding device for polishing abrasive paper, which comprises: a storage device for storing and output abrasive paper, an advancing device for dragging abrasive paper and feeding, a mobile device and a elevating gear for driving abrasive paper lateral shifting in order to contact the work piece of polishing, storage device and advancing device are located the elevating gear both sides respectively, elevating gear is connected with the mobile device is perpendicular, go up and down with drive mobile device, storage device and advancing device all with mobile device parallel connection, abrasive paper is in proper order around through storage device, elevating gear one side, mobile device, elevating gear opposite side and advancing device. By using the automatic feeding device for the grinding abrasive paper, the purposes of accurate grinding, quick feeding and the like of the abrasive paper can be realized, the grinding efficiency and the grinding effect of the abrasive paper can be improved, and the device has a compact structure and is convenient to use and can be popularized and used.

Description

Automatic feeding device for polishing abrasive paper

Technical Field

The invention relates to the technical field of dry-type grinding, in particular to an automatic feeding device for grinding abrasive paper.

Background

Among the prior art, when polishing the operation to motor output shaft, the mode that adopts artifical manual grabbing abrasive paper carries out abrasive paper change and feeds the operation mostly, leads to unable accurate, quick completion operation of polishing.

In view of the above, it is an urgent need to solve the problems of the prior art to provide a device capable of feeding sandpaper quickly and accurately.

Disclosure of Invention

In view of this, the present invention provides an automatic feeding device for polishing sand paper, which can achieve the purposes of precise polishing and rapid feeding of sand paper, and is beneficial to improving the polishing efficiency and effect of sand paper, and the device has a compact structure, is convenient to use, and can be popularized and used.

In order to achieve the above purpose, the invention provides the following technical scheme:

an automatic sanding sandpaper feeding device, comprising: a storage device for storing and output abrasive paper, be used for dragging advancing device that abrasive paper fed, be used for driving abrasive paper lateral shifting is with contact mobile device and the elevating gear of polishing the work piece, storage device with advancing device is located respectively the elevating gear both sides, elevating gear with the mobile device is connected perpendicularly, in order to drive the mobile device goes up and down, storage device with advancing device all with mobile device parallel connection, abrasive paper is in proper order around the warp storage device elevating gear one side the mobile device elevating gear opposite side and advancing device.

Preferably, mobile device's mounting plate locates the elevating gear top, storage device with advancing the device and all locating elevating plate, elevating plate with mounting plate passes through the connecting rod to be connected, elevating plate is equipped with and is convenient for the opening that elevating gear passed, the correspondence of opening both sides is equipped with the rotation piece of the abrasive paper transmission of being convenient for, mounting plate with it is convenient for to rotate the piece and correspond the position be equipped with and be convenient for the reservation hole site that abrasive paper passed, the mobile device top is equipped with and is used for changing abrasive paper direction of motion's abrasive paper support.

Preferably, the mobile device is including being used for driving sand paper support lateral shifting's motion support, being used for the drive motion support lateral shifting's sharp conveyer and being used for making the motion support elastic module that resets, the sand paper support is located the motion support top, sharp conveyer with elastic module locates respectively the motion support left and right sides.

Preferably, the motion bracket is movably arranged on the mounting base plate, and the mounting base plate is provided with a linear guide rail for limiting the motion track of the motion bracket.

Preferably, a damping piece is arranged between the linear conveying device and the moving support and used for reducing impact force on the linear conveying device when the moving support is reset.

Preferably, storage device include with the lifting bottom plate is perpendicular to be connected store the support, be used for storing abrasive paper the reel, be used for the drive the rotatory transmission shaft of reel and be used for ensuring the damping module that the reel is not loose, abrasive paper is around locating the reel peripheral part, damping module with the reel is located respectively store the support both sides, the transmission shaft runs through in proper order the damping module store the support with the reel.

Preferably, the reel is kept away from one side of support is equipped with and is used for pressing from both sides tightly the reel with be used for with splint locking are in epaxial retaining member of transmission, the splint laminating the reel sets up, the retaining member with transmission shaft end connection.

Preferably, the advancing device comprises an advancing bracket vertically connected with the lifting bottom plate, a rolling member for dragging the abrasive paper to feed, a driving member for driving the rolling member to rotate, and a tensioning member for pressing the rolling member tightly to tension the abrasive paper, the driving member and the tensioning member are respectively arranged at two ends of the rolling member, and the rolling member is connected with the advancing bracket.

Preferably, the driving member comprises a motor and a rotating shaft connected with an output shaft of the motor, and the rolling member comprises a main roller connected with the rotating shaft for synchronous rotation and a slave roller matched with the main roller for clamping and pulling the sand paper.

Preferably, the lifting device and the moving device are both reciprocating linear motion modules.

When the automatic feeding device for polishing abrasive paper provided by the invention is used, the abrasive paper is output by the storage device, sequentially passes through one side of the lifting device, the moving device and the other side of the lifting device, and is finally dragged by the advancing device to realize feeding of the abrasive paper. At abrasive paper operation in-process, when needs are polished the work piece and are polished the operation, can control elevating gear and rise for abrasive paper moves to the position with the work piece parallel and level of polishing, then, controls mobile device again and drives abrasive paper lateral shifting, so that the abrasive paper contact is polished the work piece and is polished the operation. After the polishing operation of the polishing workpiece is finished, the moving device can be controlled to transversely move in the opposite direction so as to be away from the polishing workpiece, and then the lifting device is controlled to descend to the original position so as to facilitate the polishing operation of the next polishing workpiece. And because storage device and advancing device all are connected with the mobile device parallel, can make the moving trajectory of abrasive paper by storage device to mobile device and by the mobile device to advancing device's moving trajectory remain unchanged to ensure that the abrasive paper position of polishing is accurate.

In conclusion, the automatic feeding device for the grinding abrasive paper provided by the invention can realize the purposes of accurate grinding, quick feeding and the like of the abrasive paper, is beneficial to improving the grinding efficiency and the grinding effect of the abrasive paper, and has the advantages of compact structure, convenience in use and capability of being popularized and used.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural view of an automatic feeding device for sanding paper according to the present invention;

FIG. 2 is a schematic structural diagram of a storage device;

FIG. 3 is a schematic view of the structure of the advancing device;

fig. 4 is a schematic diagram of a motion profile of sandpaper.

In fig. 1-4:

the device comprises a lifting device 1, a mounting base plate 2, a lifting base plate 3, a connecting rod 4, a rotating part 5, a reserved hole 6, a sand paper support 7, a moving support 8, a linear transmission device 9, an elastic module 10, a linear guide rail 11, a damping part 12, a storage support 13, a reel 14, a transmission shaft 15, a damping module 16, a clamping plate 17, a locking part 18, an advancing support 19, a rolling part 20, a tensioning part 21, a motor 22, a rotating shaft 23, a connecting block 24, a whole machine base plate 25, a storage device 26, an advancing device 27 and a sand paper moving track 28.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The core of the invention is to provide an automatic feeding device for polishing abrasive paper, which can realize the purposes of accurate polishing, quick feeding and the like of the abrasive paper, is beneficial to improving the polishing efficiency and the polishing effect of the abrasive paper, and has compact structure and convenient use, and can be popularized and used.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of an automatic feeding device for polishing sandpaper according to the present invention; FIG. 2 is a schematic structural diagram of a storage device; FIG. 3 is a schematic view of the structure of the advancing device; fig. 4 is a schematic diagram of a motion profile of sandpaper.

This embodiment provides a sand paper automatic feeding device polishes, includes: the abrasive paper grinding device comprises a storage device 26 for storing and outputting abrasive paper, an advancing device 27 for dragging abrasive paper to feed, a moving device for driving abrasive paper to transversely move to contact with a grinding workpiece, and a lifting device 1, wherein the storage device 26 and the advancing device 27 are respectively positioned on two sides of the lifting device 1, the lifting device 1 is vertically connected with the moving device to drive the moving device to lift, the storage device 26 and the advancing device 27 are both connected with the moving device in parallel, and the abrasive paper sequentially passes through the storage device 26, one side of the lifting device 1, the moving device, the other side of the lifting device 1 and the advancing device 27.

It should be noted that, since the storage device 26 and the advancing device 27 are connected in parallel with the moving device, the moving track of the sandpaper from the storage device 26 to the moving device and the moving track of the sandpaper from the moving device to the advancing device 27 can be kept constant, so as to ensure the precision of the sanding position. The storage device 26 may be arranged as a reel 14 such that the coated abrasive can be pulled from the reel 14 when the advancing device 27 is pulling the coated abrasive.

The structures, sizes, positions, etc. of the storage device 26, the advancing device 27, the moving device, and the lifting device 1 can be determined according to actual conditions and actual requirements during actual use.

It should be noted that, when the automatic feeding device for sanding sandpaper provided by the present invention is used, sandpaper is delivered from the storage device 26, sequentially passes through one side of the lifting device 1, the moving device, and the other side of the lifting device 1, and is finally dragged by the advancing device 27 to achieve feeding of sandpaper. At abrasive paper operation in-process, when needs are polished the work piece and are polished the operation, can control elevating gear 1 and rise for abrasive paper moves to the position with the work piece parallel and level of polishing, then, controls mobile device again and drives abrasive paper lateral shifting, so that abrasive paper contact polish the work piece and polish the operation. After the polishing operation of the polishing workpiece is completed, the moving device can be controlled to transversely move in the opposite direction so as to be away from the polishing workpiece, and then the lifting device 1 is controlled to descend to the original position so as to facilitate the polishing operation of the next polishing workpiece.

On the basis of the above-mentioned embodiment, it is preferred, 1 top of elevating gear is located to mobile device's mounting plate 2, lifting plate 3 is all located to storage device 26 and advancing device 27, lifting plate 3 passes through connecting rod 4 with mounting plate 2 and is connected, lifting plate 3 is equipped with the opening that elevating gear 1 of being convenient for passed, the opening both sides correspondence is equipped with the rotation piece 5 of being convenient for the abrasive paper transmission, mounting plate 2 correspond the position with rotation piece 5 and are equipped with the reservation hole site 6 that is convenient for the abrasive paper to pass, the mobile device top is equipped with the abrasive paper support 7 that is used for changing the abrasive paper direction of motion, thereby make abrasive paper can be exported by storage device 26, then around elevating gear 1 one side, mobile device, elevating gear 1 opposite side, finally dragged in order to realize abrasive paper feeding operation by.

It should be noted that, can fix elevating gear 1 on the complete machine bottom plate 25 of polishing the automatic device that gives of abrasive paper, elevating gear 1 can pass through complete machine bottom plate 25 and carry out the elevating movement, and elevating gear 1 lift process can drive the 2 lifts of the mounting plate of mobile device, and 2 lifts in-process can drive lifting plate 3 in step to go up and down of mounting plate, and this process can ensure that the orbit that the abrasive paper fed the process keeps unchangeable, more is favorable to guaranteeing the accurate unanimity of abrasive paper position of polishing. The sandpaper motion profile 28 may refer to the path shown in fig. 4. The same reserved hole sites 6 can be arranged on the whole machine bottom plate 25 corresponding to the installation bottom plate 2 so as to facilitate the passing and feeding of the abrasive paper.

It should be noted that, when the grinding operation is performed on the grinding workpiece, the workpiece grinding operation can be performed by controlling the movements of the lifting device 1 and the moving device to make the side of the sandpaper holder 7 approach and contact the grinding workpiece.

The shape, size, structure, position, material and the like of the mounting base plate 2, the lifting base plate 3, the connecting rod 4, the opening, the rolling element 20, the reserved hole site 6, the sand paper bracket 7 and the like can be determined in the actual application process according to the actual conditions and the actual requirements.

Preferably, the moving device comprises a moving support 8 for driving the sand paper support 7 to move transversely, a linear conveying device 9 for driving the moving support 8 to move transversely, and an elastic module 10 for resetting the moving support 8, the sand paper support 7 is arranged at the top of the moving support 8, and the linear conveying device 9 and the elastic module 10 are respectively arranged at the left side and the right side of the moving support 8.

In this embodiment, after mobile device along with elevating gear 1 motion to the high position with the work piece parallel and level of polishing, can control the operation of sharp conveyer 9, in order to drive motion support 8 and carry out lateral shifting, in order to polish the work piece and place in abrasive paper support 7 one side, after the work piece of polishing is placed in place, can control sharp conveyer 9 stop work, motion support 8 will be can be in elastic module 10 elastic force effect down reverse movement, so that abrasive paper support 7 is near polishing the work piece, thereby be convenient for carry out subsequent operation of polishing.

Preferably, the movable support 8 is movably arranged on the mounting base plate 2, the mounting base plate 2 is provided with a linear guide rail 11 for limiting the motion track of the movable support 8, namely, when the moving device moves horizontally left and right, the movable support 8 and the abrasive paper support 7 cannot shift, and the movable support 8 only moves horizontally left and right along the linear guide rail 11, so that the motion track of the abrasive paper is kept in a preset state, and the accuracy and consistency of the polishing position of the abrasive paper are favorably ensured.

Preferably, a shock absorbing member 12 is disposed between the linear transporter 9 and the moving bracket 8, and the shock absorbing member 12 is used for reducing the impact force applied to the linear transporter 9 when the moving bracket 8 is reset.

It should be noted that, the damping member 12 may be a buffering material member, so that when the moving support 8 moves in a resetting manner under the action of the elastic force of the elastic module 10, the impact force of the moving support 8 on the linear transport device 9 may be effectively reduced, so as to prevent the linear transport device 9 and the moving support 8 from being damaged, which is beneficial to prolonging the service life of the device.

In the actual application process, the shapes, sizes, structures, positions, materials and the like of the motion bracket 8, the linear conveyor 9, the elastic modules 10, the linear guide rails 11 and the shock absorbing members 12 can be determined according to actual conditions and actual requirements.

On the basis of the above embodiment, it is preferable that the storage device 26 includes a storage bracket 13 vertically connected to the lifting/lowering base plate 3, a reel 14 for storing the sandpaper, a driving shaft 15 for driving the reel 14 to rotate, and a damping module 16 for securing the reel 14 against looseness, the sandpaper is wound around an outer circumferential portion of the reel 14, the damping module 16 and the reel 14 are respectively disposed on both sides of the storage bracket 13, and the driving shaft 15 sequentially penetrates through the damping module 16, the storage bracket 13, and the reel 14.

It should be noted that, the lifting device 1 can drive the storage bracket 13 to move up and down when lifting, and when the front feeding device 27 drags the sandpaper, the sandpaper can rotate along the reel 14 to be output, and due to the arrangement of the damping module 16, the sandpaper can be effectively prevented from loosening the reel 14, and the smooth rotation of the reel 14 is not affected, so that the sandpaper can be smoothly output continuously.

Preferably, a clamping plate 17 for clamping the reel 14 and a locking member 18 for locking the reel 14 and the clamping plate 17 on the transmission shaft 15 are arranged on one side of the reel 14 away from the bracket, the clamping plate 17 is attached to the reel 14, and the locking member 18 is connected with the end of the transmission shaft 15, so that the fixing effect of the reel 14 is effectively ensured, the sand paper in the reel 14 is prevented from loosening to influence the feeding of the sand paper, and therefore, the sand paper can be effectively and continuously output when the reel 14 and the transmission shaft 15 rotate.

The shape, size, structure, position, material and the like of the storage bracket 13, the reel 14, the driving shaft 15, the damping module 16, the clamping plate 17 and the locking member 18 can be determined according to actual conditions and actual requirements during actual use.

On the basis of the above embodiment, preferably, the advancing device 27 comprises an advancing bracket 19 vertically connected to the lifting base plate 3, a rolling member 20 for dragging the feeding of the sandpaper, a driving member for driving the rolling member 20 to rotate, and a tightening member 21 for pressing the rolling member 20 tightly to tighten the sandpaper, wherein the driving member and the tightening member 21 are respectively provided at both ends of the rolling member 20, and the rolling member 20 is connected to the advancing bracket 19.

In this embodiment, lifting device 1 can drive advancing support 19 synchronous lifting when going up and down to remove, and when the driving piece began to operate, it can drive rolling member 20 and roll, and rolling member 20 rolls the in-process and can drag abrasive paper to make abrasive paper can be exported by reel 14, then around lifting device 1 one side, mobile device's abrasive paper support 7, lifting device 1 opposite side, finally by the pulling of rolling member 20 and feed.

Moreover, because one end of the rolling part 20 is provided with the tensioning part 21, the tensioning part 21 can effectively compress the rolling part 20, so that the sand paper is effectively tensioned when the rolling part 20 drags the sand paper, thereby being beneficial to improving the feeding effect of the sand paper and ensuring the motion trail of the sand paper.

Preferably, the tension member 21 may be provided as a spring to effectively press the rolling member 20.

Preferably, the driving member includes a motor 22 and a rotation shaft 23 connected to an output shaft of the motor 22, and the rolling member 20 includes a main roller for being connected to the rotation shaft 23 to be rotated synchronously and a sub roller for cooperating with the main roller to pinch and pull sandpaper.

It should be noted that a connecting block 24 may be provided between the output shaft of the motor 22 and the rotating shaft 23 to improve the rotational stability of the rotating shaft 23. In the use, operating personnel can control the rotational speed of axis of rotation 23 through control motor 22 to the rotational speed of control main gyro wheel and follow the gyro wheel, finally can effectively control abrasive paper's feed rate, in order to realize feeding at the uniform velocity of abrasive paper, is favorable to improving the effect of polishing of abrasive paper.

It should be further noted that, because the storage device 26 and the advancing device 27 are both disposed on the lifting bottom plate 3 and respectively located on two sides of the lifting device 1, and the lifting bottom plate 3 is connected with the mounting bottom plate 2 of the moving device for synchronous motion, when the main roller and the auxiliary roller rotate to drag the sandpaper by rotating the motor 22, the sandpaper can be ensured to move equidistantly at a constant speed in a predetermined track, so as to ensure continuous feeding of the sandpaper and to ensure accurate consistency of sanding positions of the sandpaper. The automatic feeding device for the polishing abrasive paper has the advantages of compact structure, stable polishing effect, precise polishing position, automatic feeding of the abrasive paper and popularization and use.

The shape, structure, dimensions, position, etc. of the advancing carriage 19, the rolling member 20, the driving member and the tensioning member 21 can be determined during the actual operation according to the actual conditions and the actual requirements.

On the basis of the above embodiments, preferably, the lifting device 1 and the moving device are both a reciprocating linear motion module.

It should be noted that, because the mobile device can drive the sandpaper to move laterally, the mobile device can be set as a cylinder linear reciprocating module. Since the lifting device 1 can perform the up-and-down lifting motion, the lifting device 1 can be set as an electric cylinder linear reciprocating motion module. Of course, the lifting device 1 and the moving device can be set as other types of reciprocating linear motion modules according to actual conditions and actual requirements in the actual application process.

It should be noted that the directions and positional relationships indicated by "up and down", "left and right" in the present application are based on the directions and positional relationships shown in the drawings, and are only for the convenience of simplifying the description and facilitating the understanding, but do not indicate or imply that the device or element referred to must have a specific direction, be configured and operated in a specific direction, and thus, should not be construed as limiting the present invention.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. Any combination of all embodiments provided by the present invention is within the scope of the present invention, and will not be described herein.

The automatic feeding device for polishing sandpaper provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a sanding abrasive paper automatic feeding device which characterized in that includes: storage device (26) for storing and output abrasive paper, be used for dragging advancing device (27) that abrasive paper fed, be used for driving abrasive paper lateral shifting is with contact mobile device and elevating gear (1) of polishing the work piece, storage device (26) with advancing device (27) are located respectively elevating gear (1) both sides, elevating gear (1) with the mobile device is connected perpendicularly, in order to drive the mobile device goes up and down, storage device (26) with advancing device (27) all with mobile device parallel connection, abrasive paper is in proper order around the warp storage device (26), elevating gear (1) one side the mobile device elevating gear (1) opposite side and advancing device (27).

2. An automatic feeding device for sanding sandpaper according to claim 1, characterized in that the mounting plate (2) of the moving device is arranged on the top of the lifting device (1), the storage device (26) and the advancing device (27) are arranged on the lifting plate (3), the lifting plate (3) is connected with the mounting plate (2) through a connecting rod (4), the lifting plate (3) is provided with an opening through which the lifting device (1) can pass, rotating pieces (5) convenient for the transmission of sandpaper are correspondingly arranged on two sides of the opening, the mounting plate (2) is provided with reserved holes (6) convenient for the sandpaper to pass through corresponding to the rotating pieces (5), and the top of the moving device is provided with a sandpaper support (7) for changing the moving direction of the sandpaper.

3. An automatic feeding device for sanding sandpaper according to claim 2, characterized in that said moving means comprises a moving bracket (8) for driving said sandpaper bracket (7) to move laterally, a linear conveyor (9) for driving said moving bracket (8) to move laterally, and an elastic module (10) for restoring said moving bracket (8), said sandpaper bracket (7) being disposed on top of said moving bracket (8), said linear conveyor (9) and said elastic module (10) being disposed on the left and right sides of said moving bracket (8), respectively.

4. An automatic sanding sandpaper feeding device according to claim 3, characterized in that said movement bracket (8) is movably arranged on said mounting base (2), said mounting base (2) being provided with linear guides (11) for limiting the movement path of said movement bracket (8).

5. An automatic feeding device for sanding sandpaper as defined in claim 4, characterized in that a shock absorbing member (12) is arranged between the linear transport device (9) and the motion bracket (8), said shock absorbing member (12) being adapted to reduce the impact force to which the linear transport device (9) is subjected when the motion bracket (8) is reset.

6. An automatic feeding device of sanding sandpaper according to any of claims 2 to 5, characterized in that said storage means (26) comprises a storage bracket (13) vertically connected to said lifting base (3), a reel (14) for storing said sandpaper, a drive shaft (15) for driving said reel (14) in rotation, and a damping module (16) for securing said reel (14) against loosening, said sandpaper being wound around the outer periphery of said reel (14), said damping module (16) and said reel (14) being respectively provided on both sides of said storage bracket (13), said drive shaft (15) successively penetrating said damping module (16), said storage bracket (13) and said reel (14).

7. An automatic feeding device of sanding sandpaper as defined in claim 6, characterized in that the side of the reel (14) remote from the holder is provided with a clamping plate (17) for clamping the reel (14) and a locking element (18) for locking the reel (14) and the clamping plate (17) on the drive shaft (15), the clamping plate (17) being arranged in abutment with the reel (14), the locking element (18) being connected to the end of the drive shaft (15).

8. Automatic feeding device for sanding sandpaper according to any one of claims 2 to 5, characterized in that said advancing means (27) comprise an advancing bracket (19) vertically connected to said lifting base (3), a rolling member (20) for dragging the feed of the sandpaper, a driving member for driving said rolling member (20) in rotation, and a tensioning member (21) for pressing said rolling member (20) in order to tension said sandpaper, said driving member and said tensioning member (21) being provided at each end of said rolling member (20), said rolling member (20) being connected to said advancing bracket (19).

9. An automatic feeding device of sanding sandpaper as defined in claim 8, characterized in that said driving member comprises a motor (22) and a rotating shaft (23) connected to an output shaft of said motor (22), and said rolling member (20) comprises a primary roller for connection to said rotating shaft (23) for synchronous rotation and a secondary roller for cooperation with said primary roller for gripping and pulling said sandpaper.

10. An automatic feeding device for sanding sandpaper as defined in any one of claims 1 to 5, characterized in that said lifting means (1) and said moving means are both reciprocating linear motion modules.