Band saw device

Abstract

To provide a band saw device 10 that can remove dust adhering to a band saw 16 without using consumables such as brushes and rubber scrapers and that can prevent the deterioration in an operation rate caused by replacement work of consumables.SOLUTION: A band saw device includes a base 11 provided with a vice 21 for fixing a workpiece 40, and a frame 12 assembled on the base 11 with a frame rotation shaft 13 as a fulcrum in a manner that it can be raised up and lowered down. The band saw device cuts the workpiece 40 by raising the frame 12 and fixing the workpiece 40 to the base 11 with the vice 21, and then lowering the frame 12 onto the base 11 and pressing a band saw blade exposed to a cutting opening 12c against the workpiece 40. An air passage 12d is formed inside the frame 12 to guide air from a cooling fan 20 to a band saw 16 traveling on the cutting opening 12c, and dust adhering to the band saw 16 is blown away by air from the cooling fan 20 to be discharged outside the frame 12.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a band saw device that cuts workpieces such as metal materials, plastic materials, and wood using an endless band saw that is rotated at high speed by a motor. [Background technology]

[0002] As one type of band saw device, JP 2022-86049 A and JP 59-59308 A disclose a band saw device that includes a base, a vice for fixing a workpiece to the base, and a frame that is attached to the base so that it can be raised and lowered with the frame pivoted as a fulcrum.

[0003] In this band saw device, a frame is provided with a drive pulley, a driven pulley, an endless band saw wound between the two pulleys, a cooling fan that draws outside air into the frame, and a motor that drives the cooling fan and the drive pulley.

[0004] In addition, a cutting opening is formed in the frame through which the band saw runs while being partially exposed, and band saw guides are provided at both the front and rear ends of the cutting opening for twisting the band saw exposed in the cutting opening so that the blade of the band saw faces downward.

[0005] To cut a workpiece such as a pipe material with this band saw device, the frame is raised from the base, and the workpiece is clamped in a vice and fixed to the base.

[0006] Next, the frame is lowered onto the base and the blade of the band saw exposed in the cutting opening is pressed against the workpiece to cut it. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent Publication No. 2022-86049 [Patent Document 2] Japanese Utility Model Application Publication No. 59-59308 Summary of the Invention [Problem to be solved by the invention]

[0008] When cutting soft material such as plastic pipes with a conventional band saw, if the cutting chips turn into dust and adhere to the band saw, the band saw may slip off the driven pulley or driving pulley. To prevent this, brushes and rubber scrapers are placed close to the band saw's path, and the brushes and scrapers are used to wipe off the dust from the band saw as it travels at high speed.

[0009] However, brushes and scrapers are subject to wear due to abrasion caused by the band saw moving at high speed, and therefore need to be replaced frequently. This replacement work is not only troublesome, but also requires stopping the machine every time it is replaced, reducing productivity. In view of the above problems, an object of the present invention is to provide a band saw apparatus having high productivity. [Means for solving the problem]

[0010] The present invention comprises a base having a vice for fixing a workpiece, and a frame that is attached to the base so as to be able to stand up and fall down with the frame rotation shaft as a fulcrum, The frame is provided with a drive pulley, a driven pulley, an endless band saw wound between the two pulleys, a cooling fan for drawing outside air into the frame, and a motor for driving the cooling fan and the drive pulley, and a cutting opening is formed through which the band saw travels partially exposed, and band saw guides are provided at both the front and rear ends of the cutting opening for twisting the band saw exposed in the cutting opening so that the blade of the band saw faces downward, The frame is raised and the workpiece is fixed to the base with a vice. A band saw device that cuts a workpiece by lowering a frame onto a base and pressing a band saw blade exposed in a cutting opening against the workpiece, An air passage is formed inside the frame to guide air from a cooling fan to the band saw traveling through the cutting opening, The dust adhering to the band saw is blown off by air from a cooling fan and discharged outside the frame. Preferably, an air passage is formed in the frame so as to guide the air from the cooling fan to the periphery of the band saw guide on the front side in the traveling direction of the band saw. Effect of the Invention

[0011] According to the present invention, dust adhering to a band saw can be removed without using consumables such as brushes or rubber scrapers, thereby preventing a decrease in operating rate due to the need to replace consumables. [Brief description of the drawings]

[0012] [Figure 1] 1 is a front perspective view showing a band saw apparatus according to an embodiment of the present invention; [Diagram 2] 1 is a perspective view showing a band saw device according to an embodiment of the present invention, as viewed from the rear side. [Diagram 3] 1 is a front view showing a band saw apparatus according to an embodiment of the present invention; [Figure 4] FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. [Diagram 5] 1 is a perspective view showing a drive pulley, a driven pulley, and a band saw of a band saw apparatus according to one embodiment of the present invention. FIG. [Figure 6] FIG. 2 is a plan view showing the band saw device. [Figure 7] FIG. 2 is a perspective view showing a base of the band saw device. [Figure 8] FIG. 4 is a partial cross-sectional view showing a vice of the band saw apparatus. [Figure 9] FIG. 4 is a front perspective view showing a method of using the band saw device. [Figure 10] FIG. 4 is a front view showing a method of using the band saw device. [Figure 11] FIG. 4 is a plan view showing a method of using the band saw device. EXAMPLES

[0013] The present invention will be described below with reference to the drawings. FIGS. 1 to 4 show a band saw device 10 according to an embodiment of the present invention. The band saw device 10 includes a base 11 and a frame 12. The frame 12 is mounted on the base 11 so as to be able to stand up and lie down with a frame rotation shaft 13 as a fulcrum. A driving pulley 14 and a driven pulley 15 are provided inside the frame 12, as shown by the broken lines in FIG. 3, and an endless band saw 16 is wound between the pulleys 14 and 15. The storage space 12a of the frame 12 in which the driving pulley 14 and the driven pulley 15 are provided is covered with a back cover 12b. The frame 12 is formed with a cutting opening 12c through which the band saw 16 travels while being exposed. At the front and rear ends of the cutting opening 12c, as shown in FIG. 5, band saw guides 17a and 17b are provided for twisting the band saw 16 exposed in the cutting opening 12c so as to point the blade of the band saw 16 downward.

[0014] A motor 19 for driving the drive pulley 14 is provided upright on the frame 12. As shown in Fig. 4, a cooling fan 20 for drawing outside air into the storage space 12a is attached to a main shaft 19a of the motor 19. An air passage 12d is formed in the storage space 12a of the frame 12 to guide the air blown by the cooling fan 20 to the periphery of the band saw guide 17a on the front side in the traveling direction of the band saw 16. The frame 12 is also provided with a handle 18 which is grasped when the frame 12 is raised from the base 11 or lowered onto the base 11 with the frame rotation shaft 13 as a fulcrum.

[0015] A vice 21 for fixing a workpiece to the base 11 is provided on the upper surface of the base 11. The configuration of the vice 21 is shown in detail in Figures 6, 7 and 8. The vice 21 is equipped with an iron base plate 22, a fixed clamp 23 and a movable clamp 24. The fixed clamp 23 is fixed to the base plate 22 with a bolt 25. A slide block 27a is connected to the movable clamp 24 with a bolt 27, and the slide block 27a is slidably assembled in a guide groove 29 formed in the base plate 22. One end of a slide rod 26 is connected to the slide block 27a. A clamp handle 28 is attached to the other end of the slide rod 26. A lock lever 30 for releasably locking the slide rod 26 is provided on the base plate 22. By operating the lock lever 30 to unlock the slide rod 26 and then gripping the clamp handle 28 to slide the slide rod 26, the movable clamp 24 slides on the base 22 along the guide groove 29 and moves toward and away from the fixed clamp 23, so that the pipe material 40 can be clamped between the movable clamp 24 and the fixed clamp 23 to fix the processed product to the base 11.

[0016] One corner of the base 22 on the side of the fixed clamp 23 is rotatably connected to the base 11 by a base rotation shaft 31. Meanwhile, a clamp lever 32 is attached to the corner of the base 22 on the opposite side of the base rotation shaft 31. A guide rod 33 (see FIG. 8) is vertically attached integrally to the clamp lever 32, and the tip of the guide rod 33 enters a guide hole 34 formed in the base 11. The guide hole 34 is formed in an arc shape with the base rotation shaft as the center of curvature. A guide piece 35 and a lock piece 36 are screwed and fixed to the tip of the guide rod 33. When the clamp lever 32 is in the state shown in FIG. 7 and FIG. 8, the guide piece 35 slides against the guide hole 34, and the lock piece 36 presses against the bottom back side of the guide hole 34, and the base 22 is locked to the base 11. By pressing down the clamp lever 32 to release the pressure on the lock piece 36, the clamp lever 32 can be rotated along the guide hole 34, and the base 22 can be rotated at any angle with the base rotation shaft 31 as the fulcrum.

[0017] The configuration of the band saw device 10 according to this embodiment has been described above. The procedure for cutting a PVC pipe 40 as a workpiece using the device 10 will be described with reference to Figs. To cut pipe material 40 with this band saw device 10, the frame 12 is raised, the pipe material 40 is placed on the base 22 of the vice 21, the movable clamp 24 is slid to clamp the pipe material 40 between the fixed clamp 23 and the movable clamp 24, and the pipe material 40 is fixed to the base 11.

[0018] Next, the frame 12 is laid down on the base 11, and the blade of the band saw 16 exposed in the cutting opening 12c is pressed against the pipe material 40 to cut the pipe material 40. The cut end surface 40a of the cut pipe material 40 is perpendicular to the center line 40b of the pipe material 40.

[0019] The procedure for performing an oblique cut with the band saw device 10 so that the cut end surface 40a of the pipe material intersects with the center line 40b of the pipe material 40 at 45 degrees will be described with reference to Figure 11. The clamp lever 32 is pushed down to release the pressure on the lock piece 36, and the clamp lever 32 is rotated along the guide hole 34 to rotate the base plate 22 by an angle of 45 degrees with the base plate rotation shaft 31 as a fulcrum. Then, the clamp lever 32 is raised as shown in Figures 7 and 8 to bring the guide piece 35 into sliding contact with the guide hole 34 and bring the lock piece 36 into pressure contact with the bottom rear side of the guide hole 34, thereby locking the base plate 22 to the base 11. The pipe material 40 is then clamped between the fixed clamp 23 and the movable clamp 24 and fixed to the base 11, and the frame 12 is lowered onto the base 11 to press the blade of the band saw 16 exposed in the cutting opening 12c against the pipe material 40 to cut the pipe material 40. The pipe 40 has a cut end surface 40c that intersects with the center line 40b of the pipe 40 at 45 degrees.

[0020] According to the band saw device of this embodiment, dust adhering to the band saw can be removed by air blown from the cooling fan without using consumables such as brushes or rubber scrapers, which prevents a decrease in the operating rate due to the replacement of consumables. [Explanation of symbols]

[0021] 10...Band saw device 11… Foundation 12...Frame 12a…Storage space 12c…Cutting opening 12d...Air duct 13...Frame pivot shaft 14...Drive pulley 15...Driven pulley 16…Band saw 17a, 17b...Band saw guide 18…Handle 19…Motor 19a...Main shaft 20…Cooling fan 21. Vice 22…base board 23…Fixed clamp 24…Movable clamp 25…Volts 26…Slide rod 27…Bolt 28…Clamp handle 29...Guide groove 30…Lock lever 31...Axis 32...Clamp lever 33…Guide rod 34...Guide hole 35...Guide piece 36…Lock piece 40...Processed products (pipe materials) 40a, 40c...cut end surface 40b…center line

Claims

1. The machine includes a base having a vice for fixing a workpiece, and a frame that is attached to the base so that it can be raised and lowered with the frame rotation shaft as a fulcrum. The frame is provided with a drive pulley, a driven pulley, an endless band saw wound between the two pulleys, a cooling fan for drawing outside air into the frame, and a motor for driving the cooling fan and the drive pulley, and a cutting opening is formed through which the band saw travels partially exposed. Band saw guides are provided at both the front and rear ends of the cutting opening for twisting the band saw exposed in the cutting opening so that the blade of the band saw faces downward. The frame is raised and the workpiece is fixed to the base with a vice. A band saw device that cuts a workpiece by lowering a frame onto a base and pressing a band saw blade exposed in a cutting opening against the workpiece, An air passage is formed inside the frame to guide air from a cooling fan to the band saw traveling through the cutting opening, This band saw device is characterized in that dust adhering to the band saw is blown off by air from a cooling fan and discharged outside the frame.

2. 2. The band saw apparatus according to claim 1, wherein an air passage is formed in the frame so as to guide the air from the cooling fan to a periphery of the band saw guide on the front side in the traveling direction of the band saw.

Images