JPH0572324U - Circular saw automatic polishing machine - Google Patents

Abstract

(57) [Abstract] [Purpose] It is a machine for polishing the saw blade of a circular saw with a chip, and it is possible to easily and accurately adjust the stroke of the saw blade and the stroke of the grindstone. [Structure] The intermediate lever that follows the grinding wheel advancing / retreating cam
The intermediate lever and the oscillating rod are parallel to each other when they are pressed against the rotator provided on the oscillating rod so that the position of the oscillating rod can be adjusted, and when the grinding wheel mounted on the oscillating rod moves forward most, that is, when the lowest position of the cam acts. become. Next, one arm of the bell crank is connected to the swing rod that is driven by the feed cam, and the other arm of the bell crank is provided with a rotator that is positionally adjustable. A sawtooth feed rod is pivotally attached to the tip, and when the feed rod is most advanced, that is, when the highest point of the cam is actuated, the one arm of the bell crank and the feed lever are parallel. Next, a sub rod is pivotally attached to one arm of the bell crank and is fixed by a spring, and the sub rod is connected to a swing rod driven by a feed cam, and a feed lever driven by the bell crank is stopped by a stopper. When the movement of the auxiliary crank is blocked, the auxiliary rod moves against the bell crank against the spring.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a circular saw automatic polishing machine for polishing a rake face, a tooth bottom and a back of a circular saw to which a chip is attached with a grindstone.

[0002]

[Prior Art]

 In the conventional circular saw automatic grinding machine, the movement of the feed rod that feeds the teeth of the circular saw and the movement of the rotating grindstone back and forth with respect to the circular saw follow the respective cams. Then, as shown in FIG. 9, when polishing the rake face 3, the tooth bottom 4 and the back 5 of the circular saw, so-called chip saw 2, to which the chip 1 is attached, the grindstone moves forward, that is, approaches the circular saw and reaches the tooth bottom. From then on, substantial tooth feeding has been performed. Hereinafter, the rake face, the tooth bottom and the back are collectively referred to as a saw blade. While the tooth is being fed, the whetstone retreats to polish the saw blade, and when the whetstone retreats to the highest point of the saw blade and reaches the rear surface of the chip, tooth feed is temporarily interrupted. Continues to retreat. When the grindstone has returned to a position where it does not interfere with the passage of the chip head, it will pause at that position and the tooth feeding will resume. When the feed rod finishes feeding the teeth and returns halfway, the grindstone begins to move forward. By the time the grindstone reaches the root of the tooth, the feed rod finishes retreating and changes to forward. If the grindstone does not reach the root of the tooth, the tip of the feed rod does not hit the tooth yet, so the tooth cannot be fed. The grindstone advances toward the root of the stationary circular saw, while the feed rod advances toward the rake face of the next tooth, and when the grindstone reaches the root, the tip engaging part of the feed rod contacts the rake face. It At the same time that the grindstone begins to recede from the root of the tooth, the tooth is sent and the saw blade begins to be polished again. Thus, in saw blade polishing, the tooth feed is divided into two stages, the first feed during polishing and the second feed after polishing, and there is an interruption in feed between the two.

[0003]

[Problems to be solved by the device]

 In the conventional circular saw automatic grinding machine, each cam moves the grinding stone forward and backward through the swing rod and lever or the tooth feed rod forward and backward, so even if the cam is not replaced, the lever ratio By adjusting, the momentum of the grindstone or the feed rod can be changed arbitrarily. Therefore, if you try to grind the blade of a circular saw with large teeth without replacing the cam, and increase the lever ratio so that the first feed described above is satisfied, the percentage of increase in the first feed The second feed also increases. Originally, the second feed rate is required to be approximately the same as the size of the grindstone plus the width of the chip, and the thickness of the grindstone and the width of the chip are both the diameter of the circular saw and the size of the tooth pitch. However, in general, they are about the same size. Therefore, the amount of the second feed must be substantially constant regardless of the size of the saw, but if the second feed varies depending on the saw, the saw blade cannot be polished sufficiently. Conventionally, the adjustment work is troublesome and inaccurate, and the cam is replaced according to the size of the saw tooth to be polished, pitch, etc., or it is otherwise hand-machined, resulting in inconvenience and inconvenience. It was The present invention has been made in view of the above conventional problems.When the saw blade is polished and finished, the first feed is finished and the feed is interrupted. Although the second feed is performed while waiting in the last retracted position, the amount of the first feed can be adjusted easily and accurately according to the size of the saw, and the amount of the second feed can be changed to the amount of the first feed. It aims to provide a circular saw automatic polishing machine that can be adjusted arbitrarily without being affected by it.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, in the circular saw automatic polishing machine according to the present invention, one arm of a bell crank pivotally attached to a frame is connected to a swinging rod that is driven by a feeding cam through a connecting rod. The trochanter is supported on the other arm of the bell crank in a positionally adjustable manner, the base end is pivotally attached to the frame, and the feed rod is attached to the tip at a positionally adjustable position. A whetstone and a whetstone drive motor are mounted on a swinging rod that is driven by a wagon wheel advancing / retreating cam, and when the feed rod feeds the saw teeth, the whetstone retreats to grind the saw blade and finish grinding. Although the temporary feed is interrupted, the grindstone returns to the last retracted position during that time, and the feed is restarted while the grindstone is waiting at that position, which is the same as the conventional method, but the following measures were taken. ing. A sub rod is pivotally attached to one arm of the bell crank, and the sub rod is always engaged with the one arm by the bias of a spring and extends linearly, and the connecting rod is connected to the sub rod. A pad is attached to the feed lever so that the front and rear positions can be adjusted, and a stopper that prevents the feed lever from moving forward is fixed to the frame.The grinding wheel is moved between the cam for moving the wheel and the rocking rod. The other side of the intermediate lever, which swings in contact with the advancing / retreating cam, is in contact with the trochanter that is supported by the oscillating rod so that it can be adjusted vertically. The surface is parallel to the screw rod that adjusts the trochanter up and down, and the trochanter is supported on the slide lever contact surface of the feed lever, which the trochante contacts when the feed rod moves forward during shooting, and the other arm of the bell crank. This is a configuration in which a screw rod for adjusting the sliding movement of the slider is in parallel.

[0005]

[Action]

 Adjust the position of the trochanter on the bell crank according to the pitch of the saw teeth, and at the same time check the second feed amount after the feed interruption by adjusting the stopper. The movement of the oscillating rod, which is driven by the feed cam, rotates the bell crank through the connecting rod and the sub rod and rotates the feed lever through the rotator, so that the feed rod moves forward to feed the sawteeth. After the feed is interrupted, if the backing tool hits the stopper while the second feed is being performed, the feed lever becomes unrotatable and the second feed ends. When the feed cam still rotates so as to feed the teeth, the auxiliary rod rotates against the bell crank with respect to the bell crank.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 6 is a fixed frame, 7 is a movable frame having a structure in which a top plate 8 and a bottom plate 9 are connected to columns 10 by a vertical shaft 11, and the vertical shaft 11 is supported by the fixed frame 6 so that the movable frame 7 rotates horizontally. It is flexible and can be fixed by any suitable means so that it will not move during the polishing operation. The circular saw 2 to be ground is rotatably supported on a top plate 8 of a movable frame 7 in a horizontal plane. Reference numeral 12 is a cam shaft supported by a bearing provided on the fixed frame 6, 13 is a cam shaft supported by a bearing provided on the bottom plate 9 of the movable frame 7, and both cam shafts 12 and 13 are splines. A universal joint 15 and a universal joint 16 are connected at 14, and a motor 17 drives the chain. A cam 18 for advancing and retracting a grinding wheel and a cam 19 for saw pressing are attached to the cam shaft 12 on the fixed frame 6, and a feed cam 20 is attached to the cam shaft 13 on the movable frame 7. There is. A whetstone 22 and a whetstone driving motor 23 are mounted on the upper end of a swinging rod 21 whose lower end is pivotally supported so as to be swingable in the front-back direction by being driven by a whetstone wheel moving cam 18. An intermediate lever 24 whose upper end is pivotally attached to the fixed frame 6 is pivotally mounted on the fixed frame 6 between the grinding wheel advancing / retracting cam 18 and the rocking rod 21. A roller 27 of a swing rod 21 is pressed against an intermediate lever 24 on the vehicle advancing / retracting cam 18. The rotator 27 is supported by a slider 28 which is slidably supported on a swing rod 21 in the vertical direction. The vertical position of the slider 28 is adjusted by rotating a male screw 30 screwed into a female screw 29 engraved therein. As a result, the swing angle of the swing rod 21 and thus the amount of advance / retreat of the grinding wheel is adjusted. The saw presser cam 19 operates the saw presser plate so that it is strongly pressed when polishing the rake face as is conventionally done and is gently pressed when feeding teeth. Reference numeral 31 is an oscillating rod driven by the feed cam 20, and 32 is a bell crank pivotally attached to the movable frame 7 by a shaft 33 so as to be horizontally rotatable. A slider 35 is provided on one arm 34 of the bell crank 32 so as to be slidable in the length direction of the arm. A male screw 36 is screwed onto a female screw engraved on the slider 35. It is rotatably supported by 32. An auxiliary rod 38 is superposed on the tip of the other arm 37 of the bell crank 32, and is horizontally rotatably pivoted by a pin 39. Reference numeral 40 denotes a connecting rod that connects the upper end of the swing rod 31 and the sub rod 38. The sub-rod 38 has a step wall 43 formed such that one half 41 thereof is thick and the other half 42 is thin, the other arm 37 of the bell crank 32 overlaps the thin other half 42, and the tip thereof is half the width. Is formed in an arc 44 centered on the pin 39, and the tension spring 45 stretched between the other arm 37 and the auxiliary rod 38 causes the end face 46 of the other half of the width to always be the step wall 43. Is pressed against. A feed lever 47 is rotatably and horizontally supported on a top plate 8 of the movable frame 7 by a pin 48, and is urged clockwise by a tension spring 49 to rotate a trochanter 50 pivotally supported by a slider 35. It is pressed against the sliding surface 51 of the feed lever 47. When the feed cam 20 rotates and the point of contact of the swing rod 31 with the feed cam 20 changes to a high place, the bell crank 32 rotates about the shaft 33 in the hour hand direction. When the bell crank 32 rotates, the feed lever 47 is pushed by the trochanter 50 and rotates about the pin 48, and the tip of the feed rod 52 protruding from the feed lever 47 comes into contact with the tooth and feeds. When the teeth are fed, the force of the saw pressing plate that presses the circular saw is weakened, so the bell crank 32 and the auxiliary rod 38 are integral and do not rotate relative to each other. A pad 53 is slidably connected to the upper surface of the tip of the feed lever 47 by a groove 54, and a support 55 for supporting the feed rod 52 is fed to the upper surface of the pad 53 by a dovetail groove 56. It is slidably connected in the tooth direction. A screw rod 57 rotatably supported by the pad 53 and immovably supported in the axial direction is screwed into a female screw of the feed lever 47, and when the screw rod 57 is turned, the pad 53 moves forward and backward. ing. Further, a screw rod 58, which is rotatable above the screw rod 57 and is fixed to the abutment device 53 and is immovably supported in the axial direction, is screwed into a female screw of the support device 55. When the screw rod 57 is turned, the support device 55 is rotated. Are moving forwards and backwards. Reference numeral 59 is a stopper provided on the movable frame 7 so as to correspond to the pad 53. When the abutment device 53 hits the stopper 59 while the feed lever 47 is rotating, the auxiliary rod 38 rotates against the bell crank 32 against the tension spring 45, and the feed rod 52 stops to move the teeth. I will not send it.

A procedure for adjusting the stroke and the movement position of the grindstone 22 moving back and forth will be described. When the male screw 30 is turned and the slider 28 screwed to the male screw 30 is slid up or down, the position of the rotator 27 supported by the slider 28 in contact with the intermediate lever 24 changes, and the swing rod 21 Since the swing angle of the grindstone is large or small, the back-and-forth stroke of the grindstone 22 can be arbitrarily adjusted. It should be noted that, when the whetstone is most advanced, the male screw 30 for vertically adjusting the slider 28 and the sliding surface 60 of the intermediate lever 24 with which the rotator 27 supported by the slider 28 contact are assembled in parallel. Therefore, the most advanced position of the grindstone does not change even if the stroke of the grindstone changes. Therefore, the stroke is adjusted by positioning the circular saw on the movable frame so that it reaches the root of the circular saw to be polished when the grindstone is most advanced.

Next, the procedure for adjusting the movement stroke and movement position of the feed rod 52 will be described. By rotating the male screw 36 and sliding the slider 35 screwed to the male screw 36 toward or away from the shaft 33 of the bell crank 32, the rotor supported by the slider 35. Since the position where 50 contacts the sliding surface 51 of the feed lever 47 changes and the swing angle of the feed lever 47 becomes large or small, the stroke of the feed rod 52 can be arbitrarily adjusted. When the feed rod 52 is most advanced, the male screw 36 for adjusting the position of the slider 35 and the sliding surface 51 of the feed lever 47 in contact with the rotator 49 supported by the slider 35 are parallel to each other. Since it is assembled so that even if the stroke of the feed rod 52 changes, the most advanced position of the feed rod 52 does not change.

As described above, the circular saw automatic polishing machine of the present invention can easily and precisely adjust the stroke of the grindstone, the movement position and the stroke of the feed rod, the movement position, and the desired second feed. It can be surely obtained and the work efficiency of saw blade polishing can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a circular saw automatic polishing machine of the present invention.

FIG. 2 is a perspective view of a frame.

FIG. 3 is a plan view showing a relationship between a grinding wheel advancing / retreating cam and a swing rod.

FIG. 4 is a plan view showing a relationship between a feed cam and a swing rod.

FIG. 5 is a plan view showing a relationship between a bell crank and a connecting rod.

FIG. 6 is a plan view of a feed lever.

FIG. 7 is a perspective view of a bell crank.

FIG. 8 is a rear view showing the relationship between the feed rod support and the pad.

FIG. 9 is an explanatory diagram showing a relationship between a grindstone and saw teeth.

[Explanation of symbols]

 18 Grinding wheel advancing / retreating cam 20 Feeding cam 21 Swinging rod 22 Grinding stone 24 Intermediate lever 26, 27 Rotor 30 Male screw 31 Swinging rod 32 Bell crank 34 One arm 35 Slider 36 Male screw 37 Other arm 38 Sub rod 39 pin 40 Connection Rod 47 Feed Lever 52 Feed Rod 53 Fitting Tool 59 Stopper

Claims (1)

[Scope of utility model registration request] 1. An arm of a bell crank pivotally attached to a frame is connected to a swing rod driven by a feed cam via a connecting rod, and a trochanter is rotatably attached to the other arm of the bell crank. The trochanter is pressed against a feed lever having a base end pivotally attached to the frame and a feed rod attached to the tip so that the position of the feed rod can be adjusted. And a grindstone driving motor is mounted, the saw blade is polished when the feed rod feeds the saw blade, and the saw blade is polished.When polishing is finished, the temporary feed is interrupted and the grindstone returns to the last retracted position during that time. , In a circular saw automatic grinding machine in which the feed is restarted while the grindstone is waiting at that position, the auxiliary rod is pivotally attached to one end of the bell crank, and the auxiliary rod is always urged by a spring to make one arm. And extends linearly, and the connecting rod is connected to the auxiliary rod. The stopper is attached to the feed lever and the stopper is attached to the frame to prevent the feed lever from moving forward.The upper end is pivoted between the grinding wheel advancing / retreating cam and the swing rod. The attached intermediate lever is in contact with the grinding wheel advancing / retracting cam, and the rotator in contact with the other side surface of the intermediate lever is supported by the rocking rod so that its vertical position can be adjusted. The sliding contact surface of the roller is parallel to the screw rod that vertically adjusts the slider on which the trochanter is supported. A circular saw automatic polishing machine characterized in that it is parallel to a screw rod that adjusts the sliding of the slider.