JP2006326774A - Grinding machine for chain saw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable exact feed and reliable grinding by mechanically feeding a saw chain to a grinder when grinding the saw chain. <P>SOLUTION: This grinding machine is constituted of a saw chain mount provided to be rotatable to front and rear sides with a base shaft as a center on a base and mounted by horizontally placing the saw chain removed from a chain saw main machine, a handle mounted on the saw chain mount to be rotatable to left and right sides and having a feeding claw engageable to the saw chain, and the grinder provided on the base to enter between a depth gauge of the saw chain and a cutting blade when rotating the saw chain mount to the front with the base shaft as a center after feeding the saw chain by prescribed pitch by the feeding claw by rotating the handle and the grinder having a grinding tool to polish upper blade and horizontal blade of the cutting blade. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a chain saw polishing machine that polishes a saw chain that is a blade of a chain saw.

  Since the saw chain also wears with use, it must be polished to restore sharpness. Polishing of a saw chain is generally performed with a hand grinder and the like one by one with the saw chain attached to the machine, but this method is performed manually. Along with this, the shape of each blade may be different, and the balance may be lost, making it impossible to cut.

For this reason, as seen in Patent Documents 1 to 3, a gauge or the like that sets the angle and depth of cut of a grindstone (file) may be used. However, even in this case, the feed of the saw chain or the cutting of the grindstone is still manual, so there is a variation in each blade, and the shape of each blade differs with polishing is not much different. It was. In addition, the saw chain has a left cutter and a right cutter. Depending on the usage of the operator, the wear of one cutter may be intense and vibration may be generated. In order to improve this, it is necessary to polish while correcting so that the shape and blade shape of both cutters are uniform, but this cannot be achieved with the polishing tool as described above.
Japanese Patent Laid-Open No. 55-018381 JP 09-001423 A JP 09-314418 A

  The present invention solves such problems, and mechanically feeds the saw chain and cuts the grindstone so that it can be accurately polished one by one, and the shape of the left and right cutters And even when the blade shape is out of order, this can be corrected.

  Under the above-described problems, the present invention provides a saw chain mounting base according to claim 1, which is provided on the base so as to be pivotable back and forth around the base shaft, and which is attached to a saw chain removed from the machine. , A handle having a feed claw that is attached to the saw chain mounting base so as to be pivotable to the left and right, and engageable with the saw chain; A chain saw polishing machine comprising a grinder having a grindstone that penetrates between the depth gauge of the saw chain and the cutting blade when the mounting base is rotated forward about the base axis and polishes the upper blade and the horizontal blade of the cutting blade. Provided.

  Further, the present invention provides a saw chain mounting base that is provided on the base and is attached to the saw chain that is detached from the chain saw main body, and is attached to the saw chain mounting base so as to be turnable to the left and right. A handle having a feed claw that can be engaged with the saw chain, and provided on the base so as to be able to rotate back and forth. There is provided a chain saw polishing machine comprising a grinder having a grindstone which is inserted between a depth gauge of a saw chain and a cutting blade and polishes an upper blade and a horizontal blade of the cutting blade.

  According to the present invention, in the above polishing machine, the handle according to claim 3 is provided with a first stopper for restricting the feed of the saw chain by the feed pawl based on the rotation to be fixed to the first stopper. Then, when the handle is further rotated, a means is provided which is provided with a second stopper that further rotates against the force of the spring and enables fine feed of the saw chain by the feed claw.

  According to the polishing machines of the first and second aspects, the saw chain is fed by a predetermined pitch by the feed claw, so that it is always fed to the same position with respect to the grindstone. Therefore, each cutting blade can be ground into the same shape and blade shape. In this case, according to the means of claim 3, the grinder is set at a predetermined position after contacting the first stopper, and then contacted with the second stopper, so that a fine feed (cut) for polishing is performed. Therefore, more accurate and reliable polishing can be achieved. Further, if the turning force of the handle is loosened after coming into contact with the second stopper, the handle returns to the first stopper, so that the blade surface is not scraped off when the saw chain is removed from the grindstone.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, a saw chain will be described. 8 is a side view of the saw chain, and FIG. 9 is a cross-sectional view. The saw chain is slidably contacted with the periphery of the guide plate 1 and is continuously connected to the cutter 2, the tie strap 3, and the drive link 4. It is connected to. The cutter 2 is composed of a depth gauge 5 and a cutting edge 6. Of these, the cutting edge 6 is bent by about 90 ° with respect to the horizontal blade 6a and the horizontal blade 6a each having a scooping surface. The upper cutter 6b is composed of an upper blade 6b, and a left cutter 2A attached to the left surface and a right cutter 2B attached to the right surface as viewed in the traveling direction of the drive link 4 with the tie strap 3 interposed therebetween are alternately connected. It is a thing.

  The drive link 4 meshes with a sprocket (not shown) fitted to the output shaft of the engine, and is fitted into a groove (not shown) formed on the peripheral surface of the guide plate 1 to guide it. Thus, the periphery of the guide plate 1 is circulated. Polishing of the saw chain is to polish the horizontal blade 6a and the upper blade 6b of the cutting blade 6 along the scooping surface. In the present invention, the above saw chain is removed from the chain saw machine and polished. Details thereof will be described later.

  1 and 3 are plan views of a polishing machine showing a first example of the present invention, and FIG. 2 is a partially sectional front view. The polishing machine of this example is mounted on a base 7 and a base 7. And a handle 9 attached to the saw chain mounting base 8, a grinder 10 held on the base 7 in a fixed posture, and the like. Among these, the base 7 is a flat body having legs 11 at the four corners, and serves as a base of the polishing machine. The saw chain mounting base 8 has a flat upper surface 8a floated on the base 7 by a predetermined height, and can be rotated back and forth around a base shaft 12 provided on the left side of the base 7. Yes. In addition, in the above and the following description, the direction such as right and left or front and rear may be indicated, which is based on a plan view, that is, the state of FIG.

  The saw chain removed from the chain saw machine is mounted on the upper surface 8a of the saw chain mount 8 sideways. Specifically, a mounting screw 13a is projected at a predetermined position on the upper surface 8a of the saw chain mounting base 8, and a lateral groove 1a formed on the base side of the guide plate 1 is inserted into this, and a knob nut 13b is used from above. Tighten and fix. In this case, the saw chain is removed from a sprocket (not shown) provided in the chain saw machine, so that the length thereof is much larger than the guide plate 1. Therefore, by using this margin, the guide body 14 is fixed at a predetermined position on the upper surface 8a of the saw chain mounting base 8, and the bottom surface of the saw chain (the bottom surface of the cutter 2 and the tie strap 3) is brought into sliding contact with the guide body 14. . A groove 14a is also formed on the side surface of the guide body 14, and the bottom of the drive link 4 is inserted into the groove 14a to prevent it from coming off.

  By using such a guide body 14, the position of the saw chain with respect to the saw chain mounting base 8 is fixed, and even when feeding with a feed claw to be described later, the saw chain is pressed against the guide body 14 and the feeding is accurate and reliable. . Since the guide plate 1 can be rotated around the mounting screw 13a, the relationship with the guide body 14 can be changed by adjusting the angle, and the tension of the saw chain can be adjusted. In addition, the lateral groove 1a is attached. Adjustment is also possible by moving the screw 13a. The attachment of the guide body 14 to the saw chain mounting base 8 is not particularly limited, but in this example, the sliding surface (front surface) of the guide body 14 is parallel to the front surface of the saw chain mounting base 8.

  The handle 9 is a bar or a flat plate that can be turned left and right around a handle shaft 15 provided on the right side in front of the saw chain mounting base 8, and is attached to the back surface of the upper surface 8 a of the saw chain mounting base 8. The tip of the handle 9 on the opposite side protrudes from the saw chain mounting base 8, and a feed claw 16 for feeding the saw chain by the rotation of the handle 9 is provided here. FIG. 7 is a cross-sectional view taken along the line AA of FIG. 1 showing the feed claw 16. The feed claw 16 has a base portion 16a placed on the upper surface of the handle 9 and a left side of the top of the saw chain mounting base 8 from the base portion 16a. It consists of a leaf spring-like claw portion 16b extending in the direction, and the base portion 16a can turn around a pin 17 implanted in the handle 9. And the spring 18 is hung between the handle | steering-wheel 9 and the nail | claw part 16b, and the nail | claw part 16b is always urged | biased by the near side (saw chain side).

  The handle 9 can be rotated left and right around the handle shaft 15, but here, the following additional configuration is adopted. FIG. 6 is a cross-sectional view taken along the line BB of FIG. 1 showing this, and a control plate 19 is provided below the handle 9 (or may be above) and is inserted through the handle shaft 15 together. A spring 20 is hung between the plate 19. As a result, the front side of the control plate 19 is always urged to the right in a plan view with respect to the handle 9, but the stopper portion 19a provided on the left side of the control plate 19 contacts the left end of the handle 9 to the right. The rotation is restricted. An upright portion 19b is provided on the right side of the control plate 19 with a gap between it and the handle 9. A stop screw 21 is screwed into the handle 9 and is inserted into the second stopper 22. It is said.

  As described above, when the handle 9 is rotated to the right with the front side of the handle 9, the handle 9 is rotated by pulling the control plate 19 by the force of the spring 20, but when the control plate 19 contacts something, the handle 9 and Both control plates 19 are restricted from rotating. However, if a rightward turning force is still applied to the handle 9, the handle 9 can be rotated until it contacts the tip of the stop screw 21 against the force of the spring 20. The right turn of the handle 9 is restricted when the feed claw 16 feeds the saw chain at a predetermined pitch. That is, the stop screw 23 is provided on the saw chain mounting base 8 toward the upright portion 19 b of the control plate 19, and this is used as the first stopper 24. The handle 9 may always be returned to the starting position (left rotation position) by a spring or the like.

  The saw chain mount 8 can be rotated forward about the base shaft 12, and this rotation can be performed by rotating the handle 9 to the right. And when it rotates a predetermined amount, the rotation is regulated by the mounting base stopper 25. That is, a stop screw 26 is provided on the right front side of the base 7, and when the front surface of the saw chain mounting base 8 comes into contact with the stop screw 26, no further rotation is possible. Note that a spring 27 is wound around the base shaft 12 between the base 7 and the saw chain mounting base 8, and the saw chain mounting base 8 is always biased toward the initial position. In this case, the saw chain mounting base 8 is in contact with a stopper member (not shown) provided on the base 7 or the like, so that the initial position can always be secured at the same position.

  As a result, the handle 9 is allowed to rotate rightward until it contacts the first stopper 24 and to the right until it touches the second stopper 22 beyond the first stopper 24. Although rotation until contact with the base stopper 25 is allowed, any of them can be operated sequentially only by rotating the handle 9. That is, first, the saw chain mounting base 8 is rotated until the handle 9 comes into contact with the first stopper 24 while the saw chain mounting base 8 remains at the initial position, and then the relative rotation of the handle 9 is restricted. 8 is rotated until it contacts the mounting stopper 25. Finally, the saw chain mounting base 8 remains in its position (advanced position) and rotates until the handle 9 contacts the second stopper 22. Such sequential operation is ensured by the strength of the two springs 20 and 27 described above. Where the forward position is located is not particularly limited, but in this example, the front surface of the saw chain mounting base 8 is set to a position substantially parallel to the front surface of the base 7.

  The grinder 10 rotates the handle 9 and feeds the saw chain at a predetermined pitch by the feed claw 16 to contact the first stopper 24. Then, the grinder 10 continues the turning force to the handle 9 to bring the saw chain mount 8 to the forward position. A rod-shaped grindstone (which may be a file depending on the material of the saw chain or the like) 28 is provided between the depth gauge 5 and the cutting edge 6 of the saw chain when rotated. Specifically, a grinder mounting base 29 composed of a horizontal portion 29a and an upright portion 29b is attached to the base 7 by screwing or the like, and the grinder 10 is held by a holder 30. 30 is fixed by screwing a set screw 31b into a screw hole 31a formed in the standing portion 29b. The position of the screw hole 31a at this time is set on an extension line perpendicular to a center line (hereinafter, center line) passing through the centers of the horizontal blade 6a and the upper blade 6b in the moving direction of the saw chain.

  By the way, since the horizontal blade 6a and the upper blade 6b of the cutting blade 5 have a scooping angle α of about 30 °, when the holder 30 is fastened and fixed with a set screw 31b, the center line of the grindstone 28 is at this angle α. Only be fixed to tilt left and right. The cutter 2 includes a left cutter 2A and a right cutter 2B, and the scooping angles are reversed in the forward and backward directions, respectively. Therefore, the inclination of the holder 30 is left and right between the left cutter 2A and the right cutter 2B. Will be transferred to. Since this scooping angle α is almost determined by the model of the saw chain, a pin 32 or the like is protruded from the upright portion 29 b so that the angle comes out when the holder 30 hits the pin 32. In addition, some saw chains have a side crawling angle β which is not parallel to the center line of the saw chain and is swung out or inside by about 0 to 10 °. The grinder 10 is attached to the grinder mounting base 29 by tilting the center line of the grindstone 28 by the angle β.

  Next, the case where a saw chain is grind | polished with the above grinder is demonstrated. As described above, the saw chain is removed from the machine and the lateral groove 1a of the guide plate 1 is set through the mounting screw 13a provided on the mounting base 2. And the position and attitude | position are adjusted so that a saw chain may become an appropriate tension with the guide body 14 and the guide plate 1, and it tightens and fixes with the knob nut 13b. In this case, it goes without saying that the grinder 10 is set at a predetermined position (FIG. 1).

  Then, the handle 9 is rotated to the left so that the feed claw 16 comes to the right (at this time, the claw portion 16b is not slid only on the saw chain), and the left or right cutter 2A to polish the saw chain is used. 2B. Then, since the tip of the claw portion 16b is engaged with the rear portion of the cutting blade 6 of the cutters 2A and 2B by the action of the spring 18, the handle 9 is rotated to the right so as to send the saw chain to the left in this state. Needless to say, the claw portion 16b of the feed claw 16 is not limited to the cutting blade 6. When the handle 9 is rotated by a predetermined amount, the control plate 19 of the handle 9 comes into contact with the stop screw 23 of the first stopper 24 and stops its movement (FIG. 1).

  Even in this case, when the handle 9 is pushed in the rotating direction, the saw chain mounting base 8 is rotated forward from the initial position around the base shaft 12 and comes into contact with the stop screw 24 of the mounting base stopper 25. The rotation is stopped. In this state, that is, when the saw chain mounting base 8 is in the advanced position, the grindstone 28 of the grinder 10 enters between the depth gauge 5 and the cutting edge 6 (FIG. 3). If the saw chain mounting base 8 interferes with the grindstone 28, a notch 33 is formed in that portion. At this time, the center line of the grindstone 28 substantially coincides with the center line of the saw chain, and this is said that the grinder is at the polishing position. When the handle 9 is still rotated to the right, the handle 9 resists the force of the spring 20 of the control plate 19 and the right end thereof is a stop screw 21 provided on the upright portion 19b of the control plate 19 of the second stopper 22. The feed claw 16 feeds the saw chain further to the left (FIG. 3).

  FIG. 4 is a plan view of the main part showing the state at this time, and FIG. 5 is a rear view of the main part. The saw chain is cut when the feed from the first stopper 24 to the second stopper 22 acts on the grindstone 28. Thus, accurate and reliable polishing can be performed. Therefore, the rotation of the handle 9 from the first stopper 24 to the second stopper 22 is set to a slight amount. When this polishing is completed, the handle 9 is slightly loosened by the action of the spring 20 by slightly loosening the force of the handle 9, and at the same time when it is turned leftward to release the force further, the saw chain mounting base 8 Is returned to the initial position by the action of the spring 27. For this reason, even when the grinder mounting base 8 moves backward and the saw chain is pulled out from the grindstone 28, the polished blade surface is not scraped off.

  When the grinder mounting base 8 returns to the initial position, the next cutting blade 6 is polished by the same operation as above. In this way, when the polishing of the left or right cutters 2A and 2B is completed, in order to polish the right or left cutters 2B and 2A, the grinder 10 is shifted left and right and the same operation is performed again. In the above, the positions at which the first stopper 24, the second stopper 22 and the mounting base stopper 25 are operated can be adjusted by changing the protruding amounts of the stop screws 23, 21 and 26, respectively. Further, the amount of rotation until the handle 9 comes into contact with the first stopper 24, that is, the amount of feed of the saw chain by the feed claw 16, is naturally the mounting pitch of the cutting blade 6 in the same direction of the left or right cutters 2A, 2B. It will be set to the same level.

  From the above, it can be seen that the guide body 14 attached to the saw chain mounting base 8 has a very important meaning. In other words, when the grinder 10 is in the polishing position and the saw blade 6 of the saw chain is polished, the bottom surface of the saw chain 6 must be received to perform accurate polishing. Further, if this guide body 14 exists within the range of the feed stroke of the feed claw 16, escape of the saw chain is avoided, and accurate feed is possible. In this sense, it can be said that the guide body 14 is preferably present at least in the polishing position of the grinder 10 and further present in the operating range of the feed claw 16. Note that the feed claw 16 may be engaged with the saw chain at any location, but in order to reliably support the polishing pressure by the grinder 10, it can be said that it is preferably engaged immediately after the cutting edge 6 to be polished. .

  FIG. 10 is a plan view of a polishing machine showing a second example of the present invention. In this example, the grinder 10 can be rotated back and forth, and after the handle 9 acts on the first stopper 24, The grinder 10 is rotated to the front side so that the grindstone 28 enters between the depth gauge 5 and the cutting edge 6 to be a polishing position. Specifically, one of the screws (right side in this example) for fixing the horizontal portion 29a of the grinder mounting base 29 to the base 7 is a pin 34, and the grinder mounting base 29 can be rotated around the pin 34. It is what I did.

  Although illustration is omitted, an appropriate stopper for restricting the rotation of the grinder mounting base 29 is provided for setting the forward position and the initial position of the grinder mounting base 29, and elastic biasing to the initial position side is provided. Needless to say. Further, an appropriate handle 35 may be attached to the grinder mounting base 29 for use in turning. According to this, the saw chain mounting base 8 only needs to be fixed on the base 7, and there is an advantage that the structure is simplified.

  By the way, in the above, after turning the handle with the first stopper, the grindstone was set at the polishing position, and then the saw chain was cut into the grindstone until it was regulated with the second stopper. You may make it perform grinding | polishing by a required notch | incision, when it restrict | limits with a stopper. In this case, if an angle is set in the relative contact between the saw chain and the grindstone, the cutting of the blade surface during insertion / extraction can be reduced as much as possible, so that there is no practical problem. This has the advantage of simplifying the structure, such as eliminating the need for a control plate.

It is a top view of the polisher of a chain saw. It is a partial cross section front view of the polisher of a chain saw. It is a top view of the polisher of a chain saw. It is a principal part top view of the polisher of a chain saw. It is a principal part rear view of the polisher of a chain saw. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a principal part sectional side view of a saw chain. It is a cross-sectional view of a saw chain. It is a top view which shows the other example of the polisher of a chain saw.

Explanation of symbols

1 Guide Plate 1a Guide Plate Groove 2 Cutter 2A Left Cutter 2B Right Cutter 3 Tie Strap 4 Drive Link 5 Depth Gauge 6 Cutting Blade 6a Cutting Blade Horizontal Blade 6b Cutting Blade Upper Blade 7 Base 8 Saw Chain Mounting Base 8a Saw Chain Mounting Base 9 Handle 10 Grinder 11 Leg 12 Base shaft 13a Mounting screw 13b Knob nut 14 Guide body 14a Guide body groove 15 Handle shaft 16 Feed claw 16a Feed claw base 16b Feed claw 17 Handle pin 18 Spring 19 Control plate 19a Control plate stopper 19b Control plate upright 20 Spring 21 Stop screw 22 First stopper 23 Stop screw 24 Second stopper 25 Mounting base stopper 26 Stop screw 27 Spring 28 Grinding wheel 29 Grinder mounting base 29a Grinder mounting base Screw holes 31b set screw 32 pin 33 notch 34 pins 35 handle formed in the holder 31a upstanding portion of the horizontal portion 29b grinder mount standing portion 30 grinder

Claims (4)

  It is provided on the base so that it can be rotated back and forth around the base axis, and a saw chain mounting base for mounting the saw chain removed from the machine. A handle with a feed pawl that can be combined, and a depth gauge of the saw chain when the saw chain is rotated forward about the base shaft after the saw chain is fed by a feed pawl at a predetermined pitch by turning the handle. A machine for polishing a chain saw that includes a grinder having a grindstone that penetrates between the cutting blade and the upper blade and the horizontal blade.   A saw chain mounting base mounted on the base and attached to the saw chain removed from the machine, and a handle having a feed claw that is pivotally mounted to the saw chain mounting base and can be engaged with the saw chain; It is provided on the base so that it can be rotated back and forth, and when the saw chain is fed with a feed pawl at a predetermined pitch by turning the handle and then turned to the near side, it enters between the depth gauge of the saw chain and the cutting blade, A chain saw polishing machine comprising a grinder having a grindstone for polishing an upper blade and a horizontal blade of a blade.   The handle is provided with a first stopper that limits the feed of the saw chain by the feed pawl based on the rotation, and when the handle is further rotated after coming into contact with the first stopper, the handle rotates further against the spring force. The chain saw polishing machine according to claim 1 or 2, further comprising a second stopper that moves and allows the feed of the saw chain to be finely fed.   The chain saw grinder according to any one of claims 1 to 3, wherein the grinder is attached to a grinder mounting base provided on a base with a center line inclined to the left and right so that the bar-shaped grindstone can be shifted left and right.