JP3179830U - Belt sander - Google Patents

Abstract

An object of the present invention is to provide a lightweight belt sander at a low cost while enabling an operator to perform high-precision polishing work with high safety and high efficiency, including a polishing process and an inspection process for a small amount of various products.
A belt sander 10 in which an endless sanding belt 30 has four sides of a trapezoid is formed by connecting a guide bar 61 between columns 53 behind the pulleys 22 and 23 of the horizontal long side 21 and the endless sanding belt 30. The workpiece bar 60 is installed on the guide bar 61 so as to be parallel to the endless sanding belt 30 having the long side 21, and the front surface of the workpiece bar 60 is moved up and down by a lever operation 63. The belt pressing side 65 is provided, and the pressing force F0 of the polishing surface W1 of the endless sanding belt 30 against the workpiece W is applied.
[Selection] Figure 1

Description

  The present invention relates to a belt sander, which relates to a belt sander for a variety of small-quantity production that has dramatically improved the operability and safety including the polishing process and inspection process of workers and the high-precision polishing of polishing workpieces. Is.

  Many conventional belt sanders produce a uniform product in large quantities by stretching an endless sanding belt in a triangular shape (see, for example, Patent Document 1).

  There is also a belt sander with a square trapezoidal belt that is used in the present invention. However, because the horizontal long side, which is the polished part of the endless sanding belt, is exposed, the operator's fingers, wrists, etc. There is a high risk of damaging or entraining, and hinders the operability and safety of workers. More specifically, there is no means for pressing the horizontal long side of the endless sanding belt to the workpiece directly below, and the horizontal long side that circulates by the pressing body held by the operator is bent to the workpiece side. The belt is forcibly pulled in the moving direction of the belt, which not only deteriorates the workability but also affects high-precision polishing, which is extremely dangerous (see, for example, Patent Document 2).

  In the belt sander, polishing operations such as press deburring, sagging deburring, welding deburring, R surface polishing, hairline processing, glossing, and reverse roughing of glossing are performed in various kinds of small volume production. For this reason, the belt sander processing has a drawback in that it takes time for useless polishing work if it does not serve as an inspection process, and the work efficiency and safety of polishing are deteriorated.

Japanese Patent Laid-Open No. 5-8165 JP 2011-177852 A

  In consideration of the problems of the conventional belt sander, the belt sander of the present invention is polished with high accuracy with high safety and high efficiency for workers, including the polishing process and the inspection process for a small variety of products. The purpose is to supply a belt sander that is light and easy to assemble and disassemble at low cost.

In the belt sander of the present invention, an endless sanding belt is wound around the four sides of the trapezoid on the front surface between the upright and left columns, and pulleys are provided at both ends of the horizontal long side. A roller is provided at both ends of a substantially horizontal trapezoidal short side directly above the horizontal long side, and a roller located at the opposite side of the driving pulley is a weight tensioner roller, and the other is an idler roller. The endless sanding belt on the horizontal long side is rotated in the pulling direction, and a front and rear moving table mounted on an elevating mechanism is provided below the endless sanding belt on the horizontal long side. In the belt sander, the workpiece is rubbed against the polished surface of the endless sanding belt by ascending movement,
A guide bar is placed between the left and right columns behind the pulleys on both ends of the horizontal long side and arranged in a longitudinal relationship parallel to the endless sanding belt on the horizontal long side. A work pressing body is installed on the guide bar. It is possible to move parallel to the endless sanding belt on the horizontal long side, and further, the front side of the work pressing body is provided with a belt pressing side that moves up and down by lever operation, and the pressing force of the polishing surface of the endless sanding belt against the work is It is characterized by having a configuration in which it is given evenly.

  Further, the belt pressing side that moves up and down by lever operation of the workpiece pressing body is configured to move up and down with a predetermined stroke by an elevating mechanism and be clamped at that position.

  The belt sander is surrounded by a safety cover that can be opened and closed by a hinge, and the pulleys and rollers are surrounded by three sides excluding the horizontal long side of the endless sanding belt, and the horizontal long side is above the horizontal long side. A long side belt cover slightly wider than the width of the endless sanding belt is entangled between the safety cover between the pulleys at both ends and between the left and right columns, and the long side belt cover is longer than the belt pressing side. A slightly wide slit slot is opened near the entire length of the horizontal long side.

  In addition, the left and right columns of the belt sander are integrated by fastening the vertical columns of the left overhanger and right overhanger integrated in a U shape with a vertical reinforcing frame, and the left overhanger and the right overhanger. The floor bases of each other are fastened with a floor reinforcing material, and the main body of the endless sanding belt is suspended by the mutual top pipes.

  The belt sander can be moved parallel to the endless sanding belt on the long side by laying a work pressing body on the guide bar parallel to the endless sanding belt behind the horizontal long side polished part of the endless sanding belt. Since the front side of the body is equipped with a belt pressing side that moves up and down by lever operation, and the pressing force of the polishing surface of the endless sanding belt to the work is evenly applied, the work polishing and inspection processes are based on high accuracy. Work safely and efficiently continuously.

  Also, the belt pressing side that moves up and down by lever operation of the workpiece pressing body is configured to move up and down with a predetermined stroke by the lifting mechanism and clamped at that position, so the polishing pressure of the horizontal long side of the sanding belt against the workpiece is It is kept constant and can guarantee high-quality polishing.

  In addition, the belt sander is surrounded by a safety cover that can be opened and closed by a hinge, and the pulleys and rollers are surrounded by a safety cover that can be opened and closed by a hinge. Can work. In addition, since the long side belt cover slightly wider than the belt width is also installed on the upper side of the horizontal long side of the endless sanding belt, the worker can work safely without touching or getting caught in the horizontal long side of the circulating belt. it can.

  Further, the left and right columns are integrated by fastening the vertical columns of the left overhanger and right overhanger, which are integrated in a U-shape, with a vertical reinforcing frame, and the above left overhanger and right overhanger are integrated with each other. Are fastened with floor reinforcement, and the body of the endless sanding belt is suspended by the top pipes of each other, so the belt sander unit can be suspended by a deep structure, and presses for large workpieces such as 3 × 6 steel plates Deburring, sagging and deburring, welding deburring, R surface polishing, hairline processing, glossing, reverse roughing of glossing, and belt sander processing. A belt sander that is lightweight and easy to disassemble can be supplied at low cost.

It is a perspective view of the belt sander which shows the 1st embodiment of this invention. It is a front view which shows the basic principle of the 1st Embodiment of this invention. It is a front view of the belt sander which shows the 1st embodiment of this invention. It is sectional drawing of the workpiece | work press body which shows the 1st embodiment of this invention. It is a perspective view of the long side belt cover and work pressing body which show the 1st embodiment of this invention. It is a front view of the actual working state of the belt sander which shows the 1st embodiment of this invention. It is a perspective view of the belt sander which shows the 2nd embodiment of this invention. It is a front view of the belt sander which shows the 2nd embodiment of this invention. It is a top view of the work area | region of the workpiece in the 1st and 2nd embodiment of this invention.

  The belt sander of the present invention is a belt sander for multi-volume production that dramatically improves operability and safety including polishing and inspection processes for workers and high-precision polishing of polishing workpieces. In the embodiment, the disassembly and assembly can be simplified and supplied at low cost.

  The belt sander 10 according to the first embodiment of the present invention includes two upright columns 53 arranged on the left and right as a frame, a support frame 55 on the back, a front support frame 54 on the front, and the columns 53, It consists of a frame in which two left and right channel members 51 arranged forward from the bottom of 53 and a thick plate member 52 orthogonal thereto are welded. A polishing unit U in which the endless sanding belt 30 is formed in a substantially rectangular shape is disposed on the front support frame 54. The structure of the trapezoid 20 with the horizontal long side 21 of the endless sanding belt 30 being horizontal is provided with pulleys at both ends of the horizontal long side 21, one of which is a drive pulley 22 and the other is an idle pulley 23. A substantially horizontal trapezoidal short side 24 is disposed immediately above the side 21, rollers 25 and 26 are provided at both ends of the short side 24, and the weight tensioner roller 25 is the roller positioned opposite to the drive pulley 22. Is an idler roller 26, and the pulley and four of the rollers are wound around an endless sanding belt 30 along the four sides of the trapezoid, and the endless sanding belt 30 on the horizontal long side 21 is rotated by the drive pulley 22 in a pulling direction. The belt sander unit U has a structure.

  Next, the basic principle of the trapezoidal tension of the endless sanding belt 30 will be described with reference to FIG. The purpose of trapezoidal tension is that the work space is larger than that of triangular tension, a bright and elongated light source 40 can be taken, the polishing process and the inspection process can be combined, and the efficiency of the polishing work is improved. Specifically, the elongated light source 40 is preferably a fluorescent lamp or a bar-shaped LED illumination. The driving pulley 22 is driven by an inverter-specific motor 45, and the driving pulley 22 is rotated counterclockwise by a belt 47. The drive pulley 22 has a diameter of about 200 mm and prevents the endless sanding belt 30 from being coated with rubber on the surface and slipping. The weight tensioner roller 25 located on the opposite side of the trapezoid 20 of the drive pulley 22 is provided on an L-shaped lever having a support shaft 42 as a fulcrum with a weight 43 as a weight. The weight 43 swings between a tension stable state (solid line) and a release stable state (two-dot chain line) due to gravity, and the endless sanding belt 30 is replaced in the release stable state.

  1 and 3, the overall configuration of the belt sander 10 will be described. The lifting table 80 equipped as a known configuration has a workpiece W placed on a wooden table 81. The workpiece W is held by large friction with the wooden table 81 without being clamped. The wooden table 81 is supported by a rail angle 82 with a bearing and is movable forward and backward. The rail angle 82 is supported by the elevating unit 84 via a metal base table 83. The elevating unit 84 is mounted on the pedestal base B placed on the floor F, but other means may be used. The lifting unit 84 moves the pantograph up and down with a hydraulic or electric jack.

  In FIG. 3, the endless sanding belt 30 is provided with safety measures. That is, the three sides of the endless sanding belt 30 except the horizontal long side 21 used for leveling sanding are covered with the left safety cover 57, the upper safety cover 58, and the right safety cover 59, and can be opened and closed by hinges 56, respectively. In addition, a stopper function is provided that provides opening stability and closing stability. As a result, the opening stability makes it easy to replace the endless sanding belt 30, and the closing stability provides safety and a dust collecting effect due to sealing.

  Furthermore, the structure of the work pressing body 60 of the horizontal long side 21 and the long side belt cover 70 which are the main parts of the present invention will be described with reference to FIGS. First, the workpiece pressing body 60 is parallel to the endless sanding belt 30 on the horizontal long side 21 with two guide bars 61 and 61 entangled between the left and right columns 53 behind the pulleys 22 and 23 at both ends. Is arranged. A work pressing body 60 is installed on the guide bars 61, 61 so as to be manually movable in the circumferential rotation direction of the horizontal long side 21 of the endless sanding belt. Further, the front surface of the work pressing body 60 is provided with a belt pressing side 65 that is moved up and down by an operation lever 63 provided at the top, and equally applies the pressing force F0 of the polished surface of the endless sanding belt to the workpiece W. That is, the lifting mechanism is held at the clamping position and the unclamping position. As the configuration, various mechanisms such as a gear mechanism, a link mechanism, a cam mechanism, a spring expansion / contraction mechanism, and an air expansion / contraction mechanism are employed. One example thereof is shown in FIG. Inside the work pressing body 60, a pair of left and right cylinders C1 and C2, elevating rods 62 and 62 fitted inside the work pressing body 60, a belt pressing side 65 erected on the lower end, and a cylinder in which the belt pressing side 65 floats. Coil springs C3 and C4 float the lifting rods 62 and 62. The work pressing body 60 includes a support shaft 66 that pivotally supports the lever operation 63, and an operation ball 63 </ b> A at the lower end of the work pressing body 60 that is provided on the top surface 65 </ b> A of the belt pressing side 65. Is engaged. As a result, the work pressing body 60 presses the belt to the lowered position (clamp position) where the operating ball 63A is positioned just below the cam surface 67A and the coil springs C3 and C4 are compressed at the position indicated by the solid line where the lever operation 63 is turned to the left. The side 65 is held down and the horizontal long side 21 of the endless sanding belt is pushed down to keep the polished surface W of the workpiece W constant at the I polishing pressure F0. The state is shown in FIGS. 4 (a) and 4 (c). In addition, the operation ball 63A becomes a lateral position of the cam surface 67A at the broken line position where the lever operation 63 is turned to the right, the coil springs C3 and C4 are expanded, and the belt pressing side 65 is lifted to the raised position (unclamp position). The endless sanding belt is held at the raised position away from the horizontal long side 21. The state is shown in FIG.

  Further, the long side belt cover 70 is disposed on the upper side of the horizontal long side 21 of the endless sanding belt 30. That is, the long side belt cover 70 extends between the end pieces 71 and 72 between the safety covers 57 and 59 or the left and right columns 53 and 53 surrounding the pulleys 22 and 23 extending on the horizontal long side. Entangled. The slit long hole 73 of the long side belt cover 70 is opened to near the entire length of the horizontal long side 21. The slit long hole 73 is set to a slit width L1 that is slightly narrower than the width L of the endless sanding belt, and is further set to be slightly wider than the lateral width L2 of the belt pressing side 65 of the work pressing body 60. . As a result, the worker can perform a polishing work safely without touching or being caught in the horizontal long side of the belt around which the long side belt cover 70 circulates.

  The belt sander 10 according to the first embodiment is configured as described above, and the polishing operation is performed as follows. In FIG. 6, the worker H is raised at the lowest floor line F. Control panels 91 and 92 are arranged at a position where the hand of the worker H can reach. The endless sanding belt 30 is turned on and off, the grinding speed is adjusted, the light source 40 is turned on and off, and the height of the lifting unit 84 is adjusted. I do. The grinding speed is generally used in the range of 100 to 1000 m / min. The duct 93 sucks dust, and a nozzle (not shown) provided inside the safety covers 57 and 59 is cleaned by blowing pressurized air onto the endless sanding belt 30 that circulates at high speed.

  In the above operating state, the workpiece W is placed on the wooden table 81 as shown in FIGS. The workpiece W is held by a large friction with the wooden table 81 without being clamped. Further, the wooden table 81 is supported by a bearing at the rail angle 82 and can be moved back and forth, and is further supported by the lifting unit 84. Thereby, the workpiece W on the wooden table 81 is moved close to the horizontal long side 21 of the endless sanding belt 30. And the horizontal long side 21 of the endless sanding belt with respect to the workpiece W is moved to the polished surface W1 when the wooden table 81 is moved back and forth by the manual operation, the left and right movement of the work pressing body 60, and the belt pressing side 65 moved up and down by the operation lever 63 The pressing force F0 is equally applied.

  As shown in FIG. 5, the operator H can manually move the polished surface W1 of the workpiece W repeatedly along a left-right reciprocation trajectory H0 or a back-and-forth reciprocation trajectory V0. Therefore, the polishing operation and the inspection process while visually observing are performed continuously and efficiently with high accuracy. Further, during the polishing operation, the long side belt cover 70 has the slit long hole 73 entangled with a width L1 slightly narrower than the width L of the horizontal long side 21, and the lateral width L2 of the belt pressing side 65. It is slightly wider than that and is open to near the full length. Thereby, the worker H can perform the polishing work safely without touching or being caught in the horizontal long side 21 of the belt 30 around which the long side belt cover 70 circulates.

  The following effects are obtained by the belt sander 10 according to the first embodiment. The belt sander can be moved parallel to the endless sanding belt on the long side by laying a work pressing body on the guide bar parallel to the endless sanding belt behind the horizontal long side polished part of the endless sanding belt. Since the front side of the body is equipped with a belt pressing side that moves up and down by lever operation, and the pressing force of the polishing surface of the endless sanding belt to the work is evenly applied, the work polishing and inspection processes are based on high accuracy. Work safely and efficiently continuously.

  Also, the belt pressing side that moves up and down by the bar operation of the workpiece pressing body moves up and down with a predetermined stroke and is clamped at that position, so the polishing pressure on the horizontal long side of the sanding belt against the workpiece is kept constant. High quality polishing can be guaranteed.

  In addition, the belt sander is surrounded by a safety cover that can be opened and closed by a hinge, and the pulleys and rollers are surrounded by a safety cover that can be opened and closed by a hinge. Can work. In addition, a long side belt cover slightly wider than the belt width is also installed on the upper side of the horizontal long side of the endless sanding belt, so that the operator can touch the horizontal long side of the belt that circulates and is not caught. Can work on.

  The present invention is not limited to the belt sander 10 according to the first embodiment. That is, the belt sander 100 according to the second embodiment shown in FIGS. The left and right columns 53 are changed in design, and the vertical columns of the left overhanger 11 and the right overhanger 12 that are integrated in a U-shape in FIG. 7 and FIG. 11D is fastened and integrated, and the floor overhangers 11A and 12A of the left overhanger and the right overhanger are fastened with floor reinforcements 11C and 12C. The top pipes 13, 14 extending forward from the tops of the left overhanger 11 and the right overhanger 12 are reinforced with reinforcing members 11B, 12B and a belt sander unit U including an endless sanding belt 30 is provided. (FIG. 7 is shown by hanging two-dot chain lines). Thereby, the belt sander unit U is suspended by a deep structure. With this, for example, press deburring, sagging pan deburring, welding deburring, R surface polishing, hairline processing, glossing, reverse roughing of glossing, and belt sandering of large workpieces such as 3 × 6 steel plates. It is possible. Of course, also in the belt sander 10 according to the first embodiment, the belt sander unit U is similarly installed on the front surface of the two deep columns 53.

  The top pipes 13 and 14 are provided with a plurality of holes h of hangers 15, 16 and 17, 18 suspended in two front and rear rows, and are held through the top pipes 13 and 14 at appropriate positions of the holes h. A belt sander unit U is suspended from the lower ends of the hangers 15, 16 and 17, 18, and the height relative to the workpiece W and the optimum height of the worker H are adjusted. That is, in order to change the height of the endless sanding belt 30, the holes h of the hangers 15, 16 and 17, 18 are selected.

  FIG. 9 shows a work area S of a large workpiece of 3 × 6 steel plate K (length 3 feet, width 6 feet), which is the main function of the present invention. The belt sander unit U is supported only by two vertical columns of a left overhanger 11 and a right overhanger 12. Therefore, since the 3 × 6 steel plate K projects to the rear of the left overhanger 11 and the right overhanger 12 and can swing in the left-right direction, a wide swing area G can be secured as compared with the actual work area S.

  Therefore, the belt sander unit can be hung with a deep structure, press deburring, sagging deburring, welding deburring, R surface polishing, hairline processing, lustering and glossing of large workpieces such as 3 × 6 steel plates. The belt sander can be processed with the reverse roughness of the stock. Furthermore, a belt sander that is lightweight and easy to disassemble can be supplied at low cost.

  The belt sander of the present invention is used for polishing on the production site, such as press deburring, sabur pan deburring, welding deburring, R surface polishing, hairline processing, glossing, and reverse roughing of lustering. It can be used for work, and it can be used as a belt sander that excels in polishing diversity and contributes to cost reduction of products.

10,100 Belt sander 11 Left over hanger 12 Right over hanger 11A, 12A Floor base 11C, 12C Floor reinforcement 11D Vertical reinforcement frame 20 Trapezoid 21 Horizontal long side 22 Drive pulley 23 Idle pulley 24 Short side 25 Weight tensioner roller 26 Idle roller 30 Endless sanding belt 42 Crankshaft 43 Weight (weight)
45 Motor 46 Motor case 47 Belt 51 Channel material 52 Thick plate material 53 Column 54 Front support frame 55 Rear support frame 56 Hinge 57 Left safety cover 58 Upper safety cover 59 Right safety cover 60 Work pressing body 61 Guide bar 62 Lifting bar 63 Operation lever 63A Operation ball 65 Belt pressing side 65A Top surface 67 Cam body 67A Cam surface 70 Long side belt covers 71, 72 Both end pieces 73 Slit long hole 80 Lifting table 81 Wooden table 82 Rail angle 83 Base table 84 Lifting unit 93 Duct B Stand base C1, C2 Cylinders C3, C4 Coil spring F Floor F0 Pressing force L Belt width L1 Slit width L2 Belt pressing side width H Worker G Wide swing area S Actual work area H0 Left and right reciprocating trajectory V0 Back and forth reciprocating movement Trajectory U Belt sander unit W Work piece W1 Polished surface

Claims (4)

In front of the upright left and right columns, an endless sanding belt is wrapped around the four sides of the trapezoid, and pulleys are provided at both ends of the horizontal long side. One side is a drive pulley and the other side is an idle pulley. Rollers are provided at both ends of a substantially horizontal trapezoidal short side directly above the side, and a weight tensioner roller is used as a roller positioned diagonally to the drive pulley, and an idler roller is used as the other roller. The endless sanding belt is rotated in the direction to draw it, and a front and rear moving table mounted on the lifting mechanism is provided at the bottom of the endless sanding belt on the horizontal long side, and the workpiece placed on the front and rear moving table is moved upward. In the belt sander that is rubbed against the polished surface of the endless sanding belt,
A guide bar is placed between the left and right columns behind the pulleys on both ends of the horizontal long side and arranged in a longitudinal relationship parallel to the endless sanding belt on the horizontal long side. A work pressing body is installed on the guide bar. It is possible to move parallel to the endless sanding belt on the horizontal long side, and further, the front side of the work pressing body is provided with a belt pressing side that moves up and down by lever operation, and the pressing force of the polishing surface of the endless sanding belt against the work is A belt sander characterized in that it is configured to evenly impart.   2. The belt sander according to claim 1, wherein the belt pressing side that moves up and down by lever operation of the work pressing body is moved up and down with a predetermined stroke by an elevating mechanism and clamped at the position.   The three ends except the horizontal long side of the endless sanding belt and each pulley and each roller are surrounded by a safety cover that can be opened and closed by a hinge, and the pulleys at both ends extending the horizontal long side above the horizontal long side A long side belt cover that is slightly wider than the width of the endless sanding belt is entangled between the safety cover and the left and right columns, and the long side belt cover has a slit slot that is slightly wider than the belt pressing side. The belt sander according to claim 1, wherein is opened near the entire length of the horizontal long side.   The left and right columns are integrated by fastening the vertical columns of the left overhanger and right overhanger, which are integrated in a U-shape, with a vertical reinforcing frame, and the floors of the left overhanger and right overhanger are integrated with each other. The belt sander according to claim 1, wherein the belt sander is fastened with a floor reinforcing material and the main body of the endless sanding belt is suspended by the top pipes.

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