JP3021633U - Standing machine for rotary saw blades - Google Patents

Abstract

(57) An object of the present invention is to provide a table-top type rotary saw blade sharpening machine capable of sharpening and sharpening the blade edges of a rotary saw blade at two different angles alternately without chattering noise. A rotary saw blade (7) is held horizontally and a lever (8) is held.
The holding mechanism 3 for rotating the blade edge by a predetermined number of blades in one direction is provided with a ratchet mechanism 3C capable of feeding two blade edges, a support arm 34 for the blade edge, and a pedestal 35. The locking mechanism 4 is provided with a locking roller 47 for preventing rotation of the rotary saw blade 7 mounted on the holding mechanism 3 on the guide arm 42 by a handle 44 so as to be movable. The grinding mechanism 2 of the rotary saw blade 7 mounts a grinder mounting plate 23 on a fixed wall 21 provided on a base plate 20 that can swing on the base 1 so that the mounting position can be adjusted. A separate grinder 5 is held by the grinder holding portion 22 of the grinder mounting plate 23. In this apparatus 10, by adjusting the mounting angle of the grinder mounting plate 23, every other blade edge of the rotary saw blade 7 can be ground at a predetermined angle for sharpening.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a sharpening machine for rotary saw blades, and more particularly, for a rotary saw blade that can be easily set on a tabletop by attaching it to a brush cutter or a rotary saw. Concerning the stand-up machine.

[0002]

[Prior art]

 Conventionally, a mowing machine in which a rotary saw blade is rotated by power is used for mowing and mowing trees. Rotating saw blades used in such brush cutters include 8-blade blades, 30-blade blades, or a saw blade having a high-hardness tip attached to the blade edge of the saw blade, depending on the application. In particular, since the tip saw blade has excellent sharpness, in recent years, the spread of a brush cutter using a tip saw blade has been remarkable.

The rotary saw blade used in such a brush cutter loses its sharpness as it is used, even if it is a tip saw blade, and if it is used as it is without sharpening, the brush cutter will be damaged. Cause. It is said that most of the causes of malfunctions of brush cutters are poorly sharpened rotary saw blades. In order to prevent such a failure of the brush cutter, it is sufficient to periodically grind the blade tip or the blade back of the rotary saw blade for sharpening.

The conventional rotary saw blade sharpening machine has a complicated structure and is very expensive, but recently, a rotary saw blade sharpening machine for sharpening the rotary saw blade can be placed on a table for sharpening. Standing machines are becoming popular.

FIG. 10 (a) shows an example of the configuration of a conventional table sharpening machine 90 for a rotary saw blade that grinds and sharpens a tip saw blade.

A table-top type rotary saw blade sharpening machine 90 generally includes a base 91, a holding mechanism 92 for a tip saw blade 93, a grinder 95 and a moving mechanism 96 for the grinder 95, and a tip saw blade 93 locking mechanism. It is composed of 97 and. The holding mechanism 92 for the tip saw blade 93 is provided in the central portion of the base 91, and the tip saw blade 93 held by the lever 94 protruding from the side surface of the holding mechanism 92 can be rotated. There is. As shown in FIG. 10B, the tip saw blade 93 is provided with a tip 93A at the blade tip portion, and the sharpness of the tip saw blade 93 is improved by polishing the blade back 93B portion of the tip 93A. The grinder 95 attached to the grinder moving mechanism 96 is provided with a rotary diamond grindstone. By moving the grinder moving mechanism 96, the grinder 95 is moved to the portion of the tip 93A of the tip saw blade 93 to be ground. You can press. The tip-saw blade 93 locking mechanism 97 is provided with a spring 97B attached to a column and an arm 97 with one end of the spring 97B extended, and the tip of the arm 97 is bent upward. A rotatable roller 97C is attached to the bent portion.

In the conventional table-top type rotary saw blade sharpening machine 90 configured as described above, the blade back 93B portion of the tip 93A of the tip saw blade 93 shown in FIG. It is possible to polish in the direction perpendicular to. Therefore, when the tip saw blade 93 is ground by using the sharpening machine 90 for the rotary saw blade, after the tip saw blade 93 is attached to the holding mechanism 92, the gap between the tip portion and the tip portion of the tip saw blade 93 is The roller 97C of the locking mechanism 97 is fitted into the curved concave portion 93D at the position to fix the tip saw blade 93 onto the holding mechanism 92. In this state, one tip 93A in the tip saw blade 93 is at a position facing the grinder 95.

Therefore, if the grinder 95 is rotated in this state and the grinder moving mechanism 96 is operated to bring the grinder 95 into contact with the blade back 93B of the tip 93A of the tip saw blade 93, the tip 93A of the tip saw blade 93 Blade back 93B can be polished. After the blade back 93B of one tip 93A has been polished, the grinder moving mechanism 96 is operated to retract the grinder 95 so as not to contact the tip saw blade 93, and the lever 94 is operated in this state. The tip saw blade 93 above the holding mechanism 92 is rotated to position the next tip 93A in front of the grinder 95. When the tip saw blade 93 rotates, the arm 97A of the locking mechanism 97 bends against the spring force of the spring 97B, and the roller 97C moves out of the recess 93D while rotating. The roller 97C moves on the blade back portion of the tip saw blade 93 while rotating, and when the next concave portion 93D comes, the roller 97C is fitted into this concave portion 93D by the spring force of the spring 97B.

In this way, in the conventional sawing machine 90 for rotary saw blades, the blade backs 93B of the tip saw blades 93 can be polished one by one.

By the way, in a general rotary saw blade, in order to reduce the friction between the saw blade and the grinding groove, the blade tip portion thereof is alternately protruded in the front and back directions with respect to the disk portion of the rotary saw blade. ing. However, in the tip saw blade 93 described in FIG. 10, since the hardness of the tip 93A is extremely high and the tip 93A is attached to the tip portion of the rotary saw blade, the tip portion is struck by tapping to cut the tip. It cannot be given.

Therefore, as a result of diligent study, the present inventor, as a result, grinds every other blade back portion of the chip attached to the blade tip of the tip saw in the same direction with respect to the vertical line at a predetermined angle. We found that, if done, it had the same effect as shaving the tip saw blade.

[0012]

[Problems to be solved by the device]

 However, in the conventional table-top type rotary saw blade sharpening machine, including the sharpening machine 90 for the rotary saw blade described in FIG. However, there was a problem that every other cutting edge part could be ground and sharpened at the same angle, and the cutting edges in between could not be ground and sharpened at the same angle.

Further, in the conventional table-top type rotary saw blade sharpening machine, there is a problem in that the blade edge portion vibrates during polishing and an unpleasant chattering noise is generated.

Therefore, in the present invention, every other tip portion of a tip saw blade or an ordinary rotary saw blade is ground at the same angle, and the blade edges in between are ground at different angles to make the setting sharp. An object of the present invention is to provide a table-top type sharpening machine for a rotary saw blade that can be performed and can prevent an unpleasant chattering noise from being generated during polishing.

[0015]

[Means for Solving the Problems]

 To achieve the above-mentioned object, the present invention has a retainer for a rotary saw blade, which has a holding portion for horizontally holding the rotary saw blade at a predetermined height, and operating a lever protruding from the holding portion. A rotary saw blade holding mechanism that can rotate the rotary saw blade in one direction by a specified number of times, and a rotary saw blade that is attached to this holding mechanism so that it does not rotate. On the base, a saw blade locking mechanism and a polishing mechanism that grinds one of the cutting edges of the rotary saw blade held by the holding mechanism in a state of being locked by the locking mechanism by a grinder In a sharpening machine for a rotary saw blade, which sharpens the rotary saw blade provided in the first embodiment, in the first embodiment, a polishing mechanism is used as a base member that can move on the base about a base axis on the base. And the fixed wall protruding vertically from this base member, and the mounting angle changeable mounting In addition, it consists of a grinder mounting plate with a grinder holder and a separate grinder that is installed in the grinder holder, and this grinding mechanism grinds the rotary saw blade at a specified grinding angle for sharpening. It is characterized by

In the second embodiment, a guide hole is provided on the bottom surface of the base portion of the rotary saw blade holding mechanism, and a guide pin that is inserted into the guide hole is provided on the base so as to project from the lever. In addition to defining the total length of the guide hole so that the blade edge of the rotary saw blade moves by two blades when the guide pin is moved from one end to the other end of the guide hole by one full stroke operation, A bearing arm extending in the grinder direction of the polishing mechanism is provided at a predetermined part of the holding mechanism, and the tip of this bearing arm is located near the blade tip position for sharpening the rotary saw blade, and it is rotated to this tip. It is characterized by a pedestal that supports the saw blade from below.

Further, in the third embodiment, a guide hole is provided on the bottom surface of the base portion of the holding mechanism for the rotary saw blade, and a guide pin inserted into the guide hole is provided on the base so as to project. It regulates the total length of the guide hole so that when the guide pin is moved from one end to the other end of the guide hole by one full stroke operation, the blade length of the rotary saw blade moves by two, and the locking mechanism is also set. Is mounted on the base, a guide arm swingably mounted on this mount, and a rotary saw blade held by a rotary saw blade holding mechanism. Consists of a spring that urges in the direction and a lock roller that can adjust the position on the guide arm, and avoids the locking mechanism by following the movement of the two blades of the rotary saw blade during full stroke of the lever. Motion and move the lever half stroke. At the time of work, the feature is that the avoidance operation is performed by following the movement of one edge of the rotary saw blade.

In the rotary saw blade stander of the first aspect, a guide hole is provided on the bottom surface of the base portion of the holding mechanism, and a guide pin inserted into the guide hole is provided on the base. Specified the total length of the guide hole so that when the guide pin is moved from one end to the other end of the guide hole by one full stroke operation of the lever, the tip of the rotary saw blade moves two by two. In addition, the locking mechanism was mounted on a base, a guide arm swingably mounted on the base, and this guide arm were held by a rotary saw blade holding mechanism. It consists of a spring that urges in the direction of the rotary saw blade and a locking roller that can adjust the position on the guide arm. It follows the movement of the two blades of the rotary saw blade during full stroke operation of the lever. The locking mechanism performs the avoidance action, and the lever half During the stroke operation, the avoidance operation is performed by following the movement of one of the blades of the rotary saw blade, and the full stroke of the lever operation allows the first blade of the rotary saw blade having a predetermined angle to the vertical line. Position the blades or blade backs of different types in front of the grinder in order to perform the sharpening, and operate the lever half stroke after finishing the sharpening of the blades or blades of the first type to place the vertical edge between the blades that have been sharpened. A second type of cutting edge or back having another predetermined angle with respect to the line is positioned in front of the grinder, and the grinding angle adjusting mechanism of the grinder changes the grinding angle to this another predetermined angle, and thereafter, the lever is used. It is also possible to position the blade tip or blade back of the second type sequentially in front of the grinder while making the full stroke of the blade to perform the setting.

Then, a bearing arm extending in the grinder direction of the polishing mechanism is provided at a predetermined portion of the holding mechanism of the rotary saw blade of the conspicuous machine for the rotary saw blade of this embodiment, and the tip of the bearing arm is provided. The portion may be located in the vicinity of the position of the cutting edge for sharpening the rotary saw blade, and a pedestal for supporting the rotary saw blade from the lower side may be provided at this tip portion.

According to the saw for a rotary saw blade of the present invention, when the holding mechanism holds the rotary saw blade, the holding mechanism is provided with a portion near the grinder of the rotary saw blade near the cutting edge. It is supported from below by an attached bearing arm. At this time, the rotary saw blade held by the holding mechanism is locked by the locking mechanism so as not to rotate. Then, if the grinder mounting plate is fixed to the fixed wall of the polishing mechanism at a predetermined mounting angle, the polishing angle of the separate grinder installed in the grinder holding part of the polishing mechanism is determined. It can be sharpened by polishing at a predetermined polishing angle. After finishing dressing, the lever of the holding mechanism operates the full stroke to rotate the rotary saw blade held by the holding mechanism by the length of two cutting edges. At this time, the locking mechanism performs an avoiding operation so as not to interfere with the rotation of two blades of the rotary saw blade. After finishing the setting in one step over the entire circumference of the rotary saw blade, the half stroke of the lever operates to rotate only one blade edge of the rotary saw blade held by the holding mechanism. After this, the rest of the rotary saw blades can likewise be dressed every other piece.

[0021]

[Embodiment of device]

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 illustrates a configuration of a rotary saw blade stander 10 according to an embodiment of the present invention and a state in which a rotary saw blade is attached to the rotary saw blade stander 10. FIG.

The sharpening machine 10 for rotary saw blades according to this embodiment includes a polishing mechanism 2, a rotary saw blade holding mechanism 3, and a rotary saw blade locking mechanism 4 on a base 1. There is. The rotary saw blade holding mechanism 3 has a holding portion 3A that horizontally holds the rotary saw blade 7 at a predetermined height, and the lever 8 is operated to rotate the rotary saw blade 7 in one direction by a predetermined number of blades. It can be done. Further, the locking mechanism 4 of the rotary saw blade locks the rotary saw blade 7 attached to the holding mechanism 3 so as not to rotate. Further, the polishing mechanism 2 polishes one of the cutting edges of the rotary saw blade 7 held by the holding mechanism 3 in a state of being locked by the locking mechanism 4 by means of a grinder 5 for sharpening.

The rotary saw blade 7 is held by the clamper 37 and the set screw 38 after the mounting hole 7 A is inserted into the mounting shaft 39 provided in the holding portion 3 A and placed on the holding mechanism 3. It is fixed on the mechanism 3. The holding mechanism 3 is provided with a supporting arm 34. When the rotary saw blade 7 is fixed onto the holding mechanism 3, a receiving table 35 provided at the tip of the supporting arm 34 is attached to the polishing mechanism 2. The vicinity of the blade tip portion 7B of the rotary saw blade 7 in the vicinity of is supported from below. Further, the holding mechanism 3 is provided with a ratchet mechanism 3C, and after rotating the lever 8 in the X direction shown in the drawing to rotate the holding mechanism 3 about the rotation shaft 36, the lever 8 is again moved to the Y direction. When the holding mechanism 3 is returned to the original position by rotating it in the direction, the rotary saw blade 7 held by the holding mechanism 3 is rotated in the arrow Z direction by a predetermined number of blades.

The polishing mechanism 2 is provided with a fixed wall 21 protruding from the base member 20, and a commercially available grinder 5 can be attached to the fixed wall 21. The grinder 5 is detachably held by the grinder 5 mounting plate 23, and the grinder mounting plate 23 is fixed to the fixed wall 21 so that the mounting angle thereof can be adjusted. That is, the grinder mounting plate 23 is rotatably mounted to the fixed wall 21 by the shaft bolt 27, and by tightening the wing nut 26, the grinder mounting plate 23 can be fixed to the fixed wall 21 at a predetermined mounting angle. it can. By adjusting the mounting angle of the grinder mounting plate 23, the polishing portion 5A of the grinder 5 can adjust the angle of the blade portion 7B of the rotary saw blade 7 with respect to the polishing portion. Further, the base member 20 of the polishing mechanism 2 can adjust the distance and the angle with respect to the rotary saw blade 7 held by the holding mechanism 3 by loosening the fastening member 14.

The locking mechanism 4 includes a mounting base 40 provided on the base 1, a guide arm 42 swingably mounted on the mounting base 40, and a holding mechanism 3 which holds the guide arm 42. It includes a spring (not shown) that biases the rotary saw blade 7 in the direction of rotation, and a locking roller 47 that can adjust the position on the guide arm 42 by rotating the handle 44. When the rotary saw blade 7 is held by the holding mechanism 3, the locking mechanism 4 retracts the guide arm 42 to the outside of the base 1 so that the rotary saw blade 7 is held on the holding mechanism 3. In this state, the handle 44 is rotated so that the locking roller 47 is fitted into the recess 47C of the rotary saw blade 7, and the position of the locking roller 47 on the guide arm 42 is adjusted.

Using the rotary saw blade sharpening device 10 of the embodiment configured as described above, the rotary saw blade 7 with the clams held on the holding mechanism 3 is replaced by the polishing mechanism 2. With this, it is possible to sharpen by polishing at a predetermined angle with respect to the vertical direction. During this polishing, the cradle 35 provided at the tip of the support arm 34 provided in the holding mechanism 3 supports the vicinity of the cutting edge 7B of the rotary saw blade 7 near the polishing mechanism 2 from below. Therefore, chattering noise is reduced during polishing.

Next, regarding the configuration of the polishing mechanism 2, the holding mechanism 3 and the locking mechanism 4 of the sharpening machine 10 for the rotary saw blade described briefly above, the rotary saw blade 7 for sharpening is shown in FIG. A case where the tip saw blade 70 shown in FIG. As shown in FIG. 2A, the tip saw blade 70 has a mounting hole 71 in the center thereof, and a cutting edge portion 72 separated by a recess 74 at the peripheral edge thereof. Further, in the figure, numeral 73 is a heat radiation hole provided in a radial shape on the tip saw blade 70, for releasing the heat generated when the tip saw blade 70 is performing the cutting operation.

FIG. 2B is a partially enlarged view of the portion A of FIG. A tip 80 having a very high hardness is attached to the tip 72 of the tip saw blade 70. The tip 80 attached to the blade edge portion 72 of the tip saw blade 70 has high hardness and is hard to wear, but still has poor sharpness after long-term use. In such a case, the sharpness is restored by polishing the blade back portion of the chip 80 with a diamond grindstone. In order to secure the sharpness of the tip saw blade 70, it is effective to polish the portion of the blade back 82, and the portion of the blade tip 81 of the tip 80 need not be polished so much.

FIG. 3A is a partially enlarged perspective view showing an enlarged tip 80 adjacent to the tip saw blade 70 shown in FIG. 2B. In the conventional sharpening machine 90 for rotary saw blades described in FIG. 10, the blade back 82 of the tip 80 is ground in a direction orthogonal to the tip saw blade 70. FIG. 3C is a partially enlarged view of the tip 80 of FIG. 3A, which has been conventionally polished, viewed from the direction of arrow B. The blade back 82 of the conventional tip 80 is sharpened in a direction orthogonal to the tip saw blade 70.

On the other hand, the sharpening machine 10 for a rotary saw blade according to the present invention is used for polishing the tip saw blade 70 as shown by the dotted line at the blade back 82 of the tip 80 shown in FIG. 2A. The tip saw blade 70 has a predetermined angle θ (where θ is an angle of about 5 degrees) from the direction orthogonal to, and is ground in every other direction in the same direction. That is, the tip saw blade 70 that grinds and sharpens with the sharpening machine 10 for a rotary saw blade according to the present invention is arranged such that the grinding direction of the blade back 82 of the adjacent tip 80 is orthogonal to the tip saw blade 70. And are polished at the same predetermined angle in opposite directions. FIG. 3B is a partially enlarged arrow view of the chip 80 shown in FIG. 3A, which is viewed from the direction of arrow B, in a state in which the portion shown by the dotted line is grinded obliquely with a grinder to make the setting. As can be seen from this figure, in the constituting machine 10 for rotary saw blades of the present invention, the blade back 82A of a certain tip 80 is directed upward at a predetermined angle θ from the direction orthogonal to the tip saw blade 70. The blade back 82B of the tip 80 adjacent to this is ground so as to be directed downward at a predetermined angle θ from the direction orthogonal to the tip saw blade 70.

FIG. 4 is an assembly perspective view showing in detail the configuration of the polishing mechanism 2 of the conspicuous machine 10 for the rotary saw blade shown in FIG. 1, and the tip 80 of the tip saw blade 70 which is the rotary saw blade. 1 shows the structure of one that can be polished at a predetermined angle.

At one end of the base member 20 constituting the polishing mechanism 2, there is provided a base shaft insertion hole 25 through which a bolt 11 serving as a base shaft screwed into a base shaft mounting hole 15 provided on the base 1 is inserted. There is. The base shaft insertion hole 25 has a rectangular shape with a cross-sectional area much larger than the cross-sectional area of the bolt 11. The bolt 11 is inserted into the tightening fitting 14 and the washer 13 and then screwed into the nut 12 on the back surface side of the base 1. The reason why the cross-section area of the base shaft insertion hole 25 is large is to expand the range in which the other end side of the base member 20 can swing with respect to the bolt 11 serving as the base shaft. The base member 20 is fixed on the base 1 by tightening a tightening metal fitting in a state where the base member 20 is rocked and positioned.

A fixing plate 21 is provided on the other end side of the base member 20 so as to project perpendicularly to the base member 20 by means such as welding. Reference numeral 24 is a reinforcing plate for the fixed wall 21. One end of the fixed wall 21 on the free end side has an arc shape, and a shaft hole 21B is provided at a portion corresponding to the center of the arc. Further, a guide pin 21A is provided in the vicinity of the arc-shaped peripheral edge portion, and a screw is cut at the tip end portion of the guide pin 21A. Further, a scale 21C indicating the rotation angle of the circular arc is provided at a predetermined portion of the arc-shaped peripheral portion, and the central scale is a thick line.

A grinder mounting plate 23 having a grinder holding portion 22 is mounted on the fixed wall 21 such that the mounting angle can be changed. The grinder mounting plate 23 has a circular arc-shaped peripheral portion having the same radius as the fixed wall 21, and a shaft hole 23B is provided in a portion corresponding to the center of the circular arc. Further, an arc-shaped guide groove 23A having a shaft hole 23B as a center is provided at a portion corresponding to the guide pin 21A protruding from the fixed wall 21. In the grinder mounting plate 23, the shaft bolts 27 are inserted into the shaft holes 21B of the fixed wall 21 and the shaft holes 23B of the grinder mounting plate 23 while the guide pins 21A on the fixed wall 21 side are inserted into the guide grooves 23A. Attached to the fixed wall 21. The shaft bolt 27 is inserted into the shaft holes 23B and 21B and then screwed into the nut 28. Then, a wing nut 26 is screwed onto the tip of the guide pin 21A protruding from the fixed wall 21 protruding from the guide groove 23A of the grinder mounting plate 23. When the wing nut 26 is tightened, the grinder mounting plate 23 is fixed to the fixed wall 21.

A thick-line scale 23C is also attached to the arc-shaped peripheral portion of the grinder mounting plate 23, and the guide pin 21A protruding from the fixed wall 21 is located at the center of the guide groove 23A of the grinder mounting plate 23. In the state of being positioned at, the scale 23C coincides with the thick line in the center of the scale 21C attached to the arc-shaped peripheral portion of the fixed plate 21. Therefore, the grinder mounting plate 23 can rotate up and down from this position by the same angle.

The grinder holding portion 22 of the grinder mounting plate 23 is located outside the fixed wall 21 in a state where the grinder mounting plate 23 is mounted on the fixed wall 21. The grinder holding portion 22 includes a sandwich plate 22A fixed to the grinder mounting plate 23, and a sandwich plate 22B attached to the sandwich plate 22A by four bolts 22C and a wing nut 22D. The two sandwiching plates 22A and 22B have their central portions curved outwardly from each other, and when the sandwiching plate 22B is attached to the sandwiching plate 22A by bolts 22C, a grinder attachment for holding the body of a grinder (not shown) between them. The recess 22E is formed.

FIG. 5A is a perspective view showing a state where the polishing mechanism 2 shown in FIG. 4 is assembled. The grinder mounting plate 23 is fixed so that the thick-line graduations 23C attached to the arc-shaped peripheral edge of the grinder mounting plate 23 coincide with the thick-line graduations at the center of the graduation 21C attached to the arc-shaped peripheral edge of the fixed plate 21. . In this state, as shown in FIG. 5B, the polishing section 51 of the grinder 5 mounted in the grinder mounting recess 22E of the grinder holding section 22 is oriented in the vertical direction.

FIG. 6A is a perspective view showing a state where the grinder mounting plate 23 of the polishing mechanism 2 shown in FIG. 5 is tilted downward with respect to the fixed wall 21 by a predetermined angle θ. In this state, as shown in FIG. 6B, the blade back 82A which is directed upward at a predetermined angle θ from the direction orthogonal to the tip saw blade 70 of the tip 80 described in FIG. 3B is polished. You can be sharpened.

FIG. 7A is a perspective view showing a state in which the grinder mounting plate 23 of the polishing mechanism 2 shown in FIG. 5 is tilted upward with respect to the fixed wall 21 by a predetermined angle θ. In this state, as shown in FIG. 7B, the blade back 82B which is directed downward at a predetermined angle θ from the direction orthogonal to the tip saw blade 70 of the tip 80 described in FIG. 3B is polished. You can be sharpened.

FIG. 8A is a perspective view showing a partial configuration of the holding mechanism 3 of the rotary saw blade shown in FIG. 1, and FIG. 8B is for the rotary saw blade shown in FIG. FIG. 3 is a side view of a state in which a rotary saw blade is attached to a rotary saw blade holding mechanism provided on a base of the stand-up machine as seen from a side surface.

On the bottom surface 30 of the base portion 3B of the rotary saw blade holding mechanism 3, there is provided a guide hole 33 having an arcuate shape with respect to the rotation shaft 36 of the base portion 3B. A guide pin 16 protruding from the base 1 is inserted in the inside. The length of the guide hole 33 should be such that when the lever 8 provided on the side wall 31 of the base portion 3B is fully stroked, the tip of the above-described tip saw blade 70 moves by two blades. good.

On the side wall 31 of the base portion 3B on which the lever 8 is provided, a supporting arm 34 is further projected. The support arm 34 extends in the direction in which the polishing portion 51 of the grinder 5 of the polishing mechanism 2 is located. The tip end of the support arm 34 is located in the vicinity of the cutting edge position for sharpening the tip saw blade 70, and a pedestal 35 that can support the tip saw blade 70 from below is provided at this tip portion. A cushioning member such as a sponge may be attached to the upper surface of the pedestal 35. Further, the shape of the pedestal 35 may be circular or rectangular.

A mounting shaft 39 is projectingly provided on the upper bottom portion 32 of the base portion 3B of the holding mechanism 3, and the mounting shaft 39 has a ratchet mechanism 3C and a holding portion 3A as shown in FIG. 8B. The tip saw blade 70, the clamper 37, and the set screw 38 are attached. When the lever 8 is operated to rotate the base portion 3B about the rotation shaft 36 by the length of the guide hole 33, the tip of the tip saw blade 70 held by the holding portion 3A rotates by two blades. When the lever 8 is returned to the original position in this state, if the tip saw blade 70 is locked by the locking mechanism 4, the ratchet mechanism 3C does not move the tip saw blade 70 and the base portion 3B is moved. Return to the original position.

FIG. 9A is a side view of the locking mechanism 4 of the rotary saw blade which locks the tip saw blade 70 attached to the holding mechanism 3 shown in FIG. 1 so as not to rotate during dressing. 9 (b) is a plan view of the locking mechanism 3 showing a state in which the locking mechanism 4 of FIG. 9 (a) locks the tip saw blade 70.

The locking mechanism 4 has a mounting base 40 provided on the base 1, and the mounting base 40 is provided with a rotary shaft 41. A bracket 48 is rotatably provided on the upper surface of the mount 40 by a rotary shaft 41, and a guide arm 42 is horizontally mounted on the bracket 48. A rotating screw 43 is provided on the bracket 48 in parallel with the guide arm 42, and a handle 44 for rotating the rotating screw is attached to one end of the rotating screw 43. A moving body 45 is attached to the guide arm 42 and the rotating screw 43. When the rotating screw 43 is rotated by the handle 44 in the direction of arrow Q, the moving body 45 screwed onto the rotating screw 43 is moved to the guide arm 42. Move in the direction of arrow R along. A pin 46 is projectingly provided on an upper portion of the moving body 45, and a locking roller 47 is rotatably inserted in the pin 46. The locking roller 47 is fitted in the recess 74 of the tip saw blade 70 to prevent the tip saw blade 70 from rotating. Therefore, the locking roller 47 can be accurately fitted into the concave portion 74 of the tip saw blade 70 by finely adjusting the shape of the concave portion of the tip of the chip saw blade 70 or the tip saw blade 70 having different radii. Incidentally, 49 is a spring for urging the rotary shaft 41 and the rotary screw 43.

In the locking mechanism 4 configured as described above, when the force for ejecting the locking roller 47 from the concave portion 74 of the tip saw blade 70 acts during the full stroke operation of the lever 8 described above, the guide arm 42 is moved. By swinging around the rotary shaft 41, the locking roller 47 is smoothly pushed out from the recess 74 of the tip saw blade 70. The locking roller 47 then follows the movement of the two cutting edges of the tip saw blade 70 and moves on the cutting edge portion 72 of the tip saw blade 70, and re-engages with the concave portion 74 of the tip saw blade 70 two points ahead. The rotation of the tip saw blade 70 can be suppressed. Further, in the locking mechanism 4 configured as described above, even when the lever 8 is half-stroked, the guide arm 42 swings around the rotation shaft 41, so that the locking roller 47 is not locked. It is smoothly extruded from the concave portion 74 of the tip saw blade 70, and the locking roller 47 follows the movement of one edge of the tip saw blade 70 thereafter and moves on the blade edge portion 72 of the tip saw blade 70, and the concave portion of the next tip saw blade 70. The rotation of the tip saw blade 70 can be suppressed by engaging with 74 again.

As explained above, according to the saw for a rotary saw blade 10 of the present invention, the tip saw blade 70 having a predetermined angle θ with respect to the vertical line is operated by the full stroke operation of the lever 8. Blades of the first type or blade spines are sequentially positioned in front of the grinder 5 for dressing, and after the dressing of the blade tips or blade spines of the first type is finished, the blade edge of which the dressing has been finished is operated by operating the half stroke of the lever 8. The second type of blade edge or blade back, which has a predetermined angle θ in the opposite direction with respect to the vertical line located between, is placed in front of the grinder 5, and the polishing angle adjustment mechanism of the grinder 5 adjusts the polishing angle to this range. The angle can be changed to a predetermined angle θ, and thereafter, while the lever 8 is fully stroked, the cutting edge or the spine of the second type can be sequentially positioned in front of the grinder 5 for dressing.

The sharpening machine 10 for a rotary saw blade according to the present invention is particularly effective for polishing a tip saw blade 70 having a beveled corner as in the above-described embodiment, but It is also possible to effectively polish the rotary saw blade 7 whose edge is rubbed by hammering out like a normal 8-blade or 30-blade blade.

[0050]

[Effect of device]

 As described above, according to the present invention, every other tip portion of a tip saw blade or a regular rotary saw blade blade is ground at the same angle for sharpening, and the blade edge between them is different. It has the effects of being able to grind at the same angle for sharpening and to reduce unpleasant chattering noise generated at the part to be ground during grinding.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a configuration of a rotary saw blade stander according to an embodiment of the present invention and a state in which a rotary saw blade is attached to the rotary saw blade stander. .

FIG. 2 (a) is a plan view of a tip saw blade for dressing with the saw for the rotary saw blade shown in FIG. 1, and FIG. 2 (b) is an enlarged view of part A of the tip saw blade of FIG. FIG.

FIG. 3A is a partially enlarged perspective view showing an enlarged tip adjacent to the tip saw blade shown in FIG. 2, and FIG.
Is a partially enlarged arrow view of a state in which the portion shown by the dotted line of No. 1 is obliquely ground with a grinder to be sharpened and is seen from the direction of arrow B, and (c) is a direction orthogonal to the tip saw blade of (a). FIG. 7 is a partially enlarged view of a conventional tip saw blade, which has been sharpened by grinding with a grinder, as seen from the direction of arrow B.

FIG. 4 shows a detailed configuration of a polishing mechanism that is provided on the base of the rotary saw blade stander shown in FIG. 1 and that polishes one of the rotary saw blades at a predetermined angle for dressing. It is an assembly perspective view shown.

5A is a perspective view showing a state in which the polishing mechanism shown in FIG. 4 is assembled, and FIG. 5B is a view for explaining a direction of a polishing portion of a grinder attached to the polishing mechanism in the state of FIG. .

6A is a perspective view showing a state where the grinder mounting plate of the polishing mechanism shown in FIG. 5 is tilted downward by a predetermined angle; FIG.
FIG. 7A is an explanatory diagram for explaining how to grind the chips provided at the blade tip portion of the tip saw blade at a predetermined angle by the grinder attached to the grinder mounting plate of the polishing mechanism of (a) to make the setting.

7A is a perspective view showing a state in which the grinder mounting plate of the polishing mechanism shown in FIG. 5 is tilted upward by a predetermined angle; FIG.
FIG. 7A is an explanatory diagram for explaining how to grind the chips provided at the blade tip portion of the tip saw blade at a predetermined angle by the grinder attached to the grinder mounting plate of the polishing mechanism of (a) to make the setting.

FIG. 8A is a rotary saw that is provided on the base of the stand-up machine for rotary saw blades shown in FIG. 1 and holds the rotary saw blades horizontally at a predetermined height and rotatably. FIG. 1B is a perspective view showing a partial configuration of a blade holding mechanism, and FIG. 1B is a rotary saw blade holding mechanism provided on a base of the conspicuous machine for the rotary saw blade shown in FIG. It is the side view which looked at the state where the saw blade was attached from the side.

9 (a) is a locking mechanism for fixing the rotary saw blade attached to a holding mechanism provided on the base of the rotary saw blade stander shown in FIG. 1 so as not to rotate during sharpening. 3B is a side view of the locking mechanism of the rotary saw blade, and FIG. 7B is a plan view of the locking mechanism showing a state in which the locking mechanism of the rotary saw blade of FIG.

10A is a perspective view showing a configuration of a conventional sawing machine for rotary saw blades, and FIG. 10B is a partially enlarged view of a tip saw blade attached to the sawing machine of FIG. 10A.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Polishing mechanism 3 Holding mechanism 3A Holding part 3B Base part 3C Ratchet mechanism 4 Locking mechanism 5 Grinder 5A Polishing part 6 Base shaft 7 Rotating saw blade 8 Lever 10 Conspicuous for rotary saw blade of one embodiment Machine 11 Bolt that serves as the base shaft 14 Tightening fitting 15 Base shaft mounting hole 16 Guide pin 20 Base member 21 Fixed wall 21A Guide pin 21B Shaft hole 21C Scale 22 Grinder holding part 22A, 22B Grip plate 22E Grinder mounting recess 23 Grinder mounting plate 23A Guide groove 23B Shaft hole 23C Scale 25 Base shaft insertion hole 33 Guide hole 34 Bearing arm 35 Cradle 36 Rotating shaft 37 Clamper 38 Fixing screw 39 Mounting shaft 40 Mounting base 41 Rotating shaft 42 Guide arm 43 Rotating screw 44 Handle 45 Moving body 47 Locking roller 48 Bracket 51 Polishing part 70 Tip Saw Blade 72 Blade Edge 74 Recess 80 Tip 81 Blade Edge 82 Blade Back

Claims (5)

[Scope of utility model registration request] 1. A holding unit for holding a rotary saw blade horizontally at a predetermined height, and rotating the rotary saw blade in one direction by a predetermined number of blades by operating a lever projecting from the holding unit. A rotary saw blade holding mechanism that can be used, a rotary saw blade locking mechanism that locks the rotary saw blade attached to the holding mechanism so that it does not rotate, and a rotary saw blade locking mechanism that locks the rotary saw blade. 1 of the blade edges of the rotary saw blade held by the holding mechanism in the closed state
In a sharpening machine for a rotary saw blade that sharpens a rotary saw blade provided on a base with a polishing mechanism that sharpens one with a grinder, and the polishing mechanism is provided on the base. A base member movable on the base about a certain base axis, a fixed wall vertically projecting from the base member, and a grinder having a grinder holding portion mounted on the fixed wall so that the mounting angle can be changed. A rotation comprising a mounting plate and a separate grinder that is installed on the grinder holding unit, and the grinding mechanism grinds the rotary saw blade at a predetermined grinding angle to perform dressing. Standing machine for saw blades. 2. A rotary saw blade having a holding portion for holding the rotary saw blade horizontally at a predetermined height, and rotating the rotary saw blade in one direction by a predetermined number of blades by operating a lever protruding from the holding portion. A rotary saw blade holding mechanism that can be used, a rotary saw blade locking mechanism that locks the rotary saw blade attached to the holding mechanism so that it does not rotate, and a rotary saw blade locking mechanism that locks the rotary saw blade. 1 of the blade edges of the rotary saw blade held by the holding mechanism in the closed state
In a sharpening machine for a rotary saw blade for sharpening a rotary saw blade provided on a base, a grinding mechanism for sharpening one with a grinder and setting the base of the rotary saw blade holding mechanism. A guide hole is provided on the bottom surface of the portion, and a guide pin that is inserted into the guide hole is provided on the base so that the guide pin is removed from one end of the guide hole by one full stroke operation of the lever. The total length of the guide hole is defined so that the blade edge of the rotary saw blade moves by two blades when moved to the other end, and the guide hole extends in a grinder direction of the polishing mechanism at a predetermined portion of the holding mechanism. A supporting arm is provided, the tip of the supporting arm is located in the vicinity of the position of the cutting edge for sharpening the rotary saw blade, and a pedestal for supporting the rotary saw blade from below is provided at this tip. A rotary saw blade characterized by Standout machine. 3. A rotary saw blade having a holding portion for holding the rotary saw blade horizontally at a predetermined height, and rotating the rotary saw blade in one direction by a predetermined number of blades by operating a lever projecting from the holding portion. A rotary saw blade holding mechanism that can be used, a rotary saw blade locking mechanism that locks the rotary saw blade attached to the holding mechanism so that it does not rotate, and a rotary saw blade locking mechanism that locks the rotary saw blade. 1 of the blade edges of the rotary saw blade held by the holding mechanism in the closed state
In a sharpening machine for a rotary saw blade that grinds one with a grinder to sharpen the rotary saw blade that is provided on a base, and a base of the rotary saw blade holding mechanism. A guide hole is provided on the bottom surface of the section, and a guide pin that is inserted into the guide hole is provided on the base so that the guide pin is removed from one end of the guide hole by one full stroke operation of the lever. Along with defining the total length of the guide hole so that the blade edges of the rotary saw blade move two by two when moved to the other end, the locking mechanism, a mounting base provided on the base, A guide arm swingably mounted on the mount, a spring for biasing the guide arm toward the rotary saw blade held by the rotary saw blade holding mechanism, and a spring on the guide arm. Composed of a locking roller whose position can be adjusted, Note that during the full stroke operation of the lever, the locking mechanism performs the avoiding operation following the movement of the two cutting edges of the rotary saw blade, and during the half stroke operation of the lever, the movement of one cutting edge of the rotary saw blade is performed. A sharpening machine for a rotary saw blade, which is characterized by performing an avoidance operation following the. 4. The sharpening machine for a rotary saw blade according to claim 1, wherein a guide hole is provided on a bottom surface of a base portion of the holding mechanism, and the guide hole is inserted on the base. A protruding guide pin, and when the guide pin is moved from one end to the other end of the guide hole by one full stroke operation of the lever, the blade edges of the rotary saw blade move two by two. As described above, the total length of the guide hole is defined, and the locking mechanism is provided with a mounting base provided on the base, a guide arm swingably mounted on the mounting base, and the guide arm. It is composed of a spring biased toward the rotary saw blade held by the rotary saw blade holding mechanism and a locking roller whose position on the guide arm can be adjusted. Follow the two movements of the rotary saw blade Then, the locking mechanism performs the avoidance operation, and when the lever is in the half stroke operation, the avoidance operation is performed by following the movement of one edge of the rotary saw blade, and the vertical movement is performed by operating the full stroke of the lever. A first type of cutting edge or blade back of the rotary saw blade having a predetermined angle with respect to a line is sequentially positioned in front of the grinder to perform dressing, and finishing of setting of the first type cutting edge or blade back A second type of cutting edge or blade back having another predetermined angle with respect to a vertical line positioned between the cutting edges that have been sharpened by operating the half stroke of the lever later is positioned in front of the grinder. Change the polishing angle to another predetermined angle by the polishing angle adjustment mechanism of
Thereafter, while the full stroke of the lever is being performed, the blade tip or blade back of the second type is successively positioned in front of the grinder for dressing, and a sharpening machine for a rotary saw blade. 5. The sharpening machine for a rotary saw blade according to claim 4, wherein the bearing arm extends in a grinder direction of the polishing mechanism at a predetermined portion of the holding mechanism of the rotary saw blade. And a tip of the support arm is located in the vicinity of a cutting edge position for dressing the rotary saw blade, and a pedestal for supporting the rotary saw blade from below is provided at the tip portion. Standing machine for rotary saw blades.