JPH0129649B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention is a polishing machine for polishing the side surfaces of saw teeth in a band saw for lumber. More specifically, the present invention relates to a side polisher for a band saw, which polishes the side surfaces of the saw teeth so that the widths of the teeth are perfectly aligned to obtain a smooth and beautiful sawn surface.

(b) Conventional technology Conventionally, side polishing machines for bandsaw teeth
No. 1, Utility Model Application Publication No. 54-94194, etc., but all of these methods have a serration that can be seen from the front, i.e., the tooth throat side, or from the upper side, i.e., the tooth dorsal side. It is polished into the shape of a shamisen drumstick, the so-called drumstick.

(d) Problems to be Solved by the Invention As mentioned above, when the saw blade is polished on the side so that it has a drumstick shape when viewed from the front, when sawing material with a polished band saw, there is a drawing on the surface of the sawn material. As shown in Fig. 17, triangular grooves d and d remain at a fine pitch, which not only makes the sawn surface uneven, but also causes bending in the saw because the direction of the band saw is not regulated when sawing. There was an easy problem.

Therefore, the present invention provides a side polishing machine for a band saw that solves the above-mentioned conventional problems by polishing the sides of the saw band so that the tooth throat widths are completely aligned, and greatly improves the commercial value of sawn wood. It is something that should be provided.

(D) Techniques for Solving Problems The band saw side polishing machine for smooth sawn surfaces according to the present invention includes a pair of grinding wheels whose spacing and wedge angle are set according to the sawtooth sharpening, and these grinding wheels are connected to the sawtooth. a first feeding means for alternately positioning the grinding wheel in a standby position and a grinding position behind the sawtooth; and a grinding wheel held in the grinding position by the first feeding means along the tooth throat of the sawtooth until it is removed from the sawtooth. The second to move and return
and a saw feeding means for feeding a band saw to change the grinding teeth when the grindstone is not being ground.

(e) Operation When the saw tooth to be ground of the band saw sent to the saw feeding means stops in front of the grinding wheel in the waiting position, the grinding wheel moves from the tooth back side of the saw tooth to the position of the saw tooth by the first feeding means. The second
The feeding means is activated, and the grinding wheels cutting on both sides are moved upward in parallel with the tooth throat to perform polishing and remove the saw tooth from above, so that the saw tooth is removed from the front side, that is, on the tooth throat side. In addition to being ground in parallel with a constant width from the root to the tip of the tooth, the required upper tooth relief angle is given by the angle of the pair of grinding wheels, and the grinding wheel that is separated from the saw tooth is driven by the first feed. The grinding wheel is moved from the grinding position to the standby position by the means, and the second feeding means returns the grinding wheel that has come off the sawtooth to the sawtooth position.During this time, the saw feeding means sends out the band saw and removes the sawtooth after grinding. By changing the unground saw teeth, a large number of saw teeth can be continuously polished so that the tooth throats are aligned at a constant width and the upper tooth clearance angle is appropriately provided.

(F) Embodiment A band saw side polisher for smooth sawn surfaces according to the present invention is implemented as shown in FIGS. 1 to 6 of the drawings.

1 and 2 of the drawings, reference numeral 1 denotes a frame, on the front side of which is provided a feed saw part 4 for supporting a band saw 3 so as to be able to be sent out between it and a presser member 2, and the lower part thereof is orthogonal to the feed saw part 4. A camshaft 5 is provided, and two lever shafts 6 and 7 parallel to the camshaft 5 are arranged above the camshaft 5.

Reference numeral 8 denotes a fan-shaped swing plate in which a mounting tube 9 is fitted to one end of the lever shaft 7, and a similar fan-shaped adjustment plate 10 is mounted on one side of the fan-shaped swing plate so as to rotate about a shaft 11 at the center of the sector. This adjustment plate 10 and the swing plate 8 are attached.
are integrated by tightening them with bolts 13 passed through arcuate elongated holes 12, and on one rear side of the adjustment plate 10, a support shaft 14 of a grinding wheel holder, which will be described later, is extended from a shaft support cylinder 15, and the above-mentioned rocker A first grinding wheel feeder 16 whose tip corresponds to one side of the camshaft 5 is provided below the moving plate 8 .

Reference numeral 17 denotes a grinding wheel holder which is rotatable in the vertical direction by fitting the rear mounting cylinder 18 onto the above-mentioned support shaft 14, and a pair of grinding wheel holders located on the left and right sides above the above-mentioned feeding saw section 4 are provided at the front part of the grinding wheel holder. The motor stands 19, 19 are inserted through a support shaft 20 provided at the rear center of the holder 17 and arc-shaped long holes 21, 21 of the holder 17 provided around the support shaft 20, as shown in FIG. 3 of the drawing. The motor bases 19, 19 are provided with guides 23, 23 in the axial direction thereof, as shown in FIG. These guides 23, 23 are engaged with sliding plates 25, 25 which are moved back and forth by adjusting screws 24, 24, and these sliding plates 25, 25 are engaged with each other.
Motor 2 with shafts 26, 26 directed inward at 5, 25
7, 27 are attached, cup-shaped grinding wheels 28, 28 are attached to the shafts 26, 26 of these motors 27, 27 so as to insert the band saw 3, and these grinding wheels 28, 2 are attached.
By adjusting the angle and spacing of the motor stands 19, 8, the saw blade 8 can be adapted to the set of the saw teeth 3' of the band saw 3, as shown in FIG. 3 of the drawing.

Reference numeral 29 designates a second grinding wheel feed lever which is loosely engaged with the lever shaft 7 described above, and its lower end corresponds to the cam shaft 5, as shown in FIG.
This small lever 30 is connected by a rod 32 to a small lever 31 projecting below the mounting tube 18 of the grinding wheel holder 17.

Reference numeral 33 connects the first feed lever 1 to the camshaft 5 described above.
When the roller 34 pivoted on the lever 16 comes into contact with the first cam attached to the first cam corresponding to the position shown in FIG. That is, as shown in FIG. 10, when the roller 34 is positioned behind the saw teeth 3' and comes into contact with a high place, the grinding wheels 28, 28 are positioned at the chain line in the same figure, that is, as shown in FIG. The shape is determined so that the blades are positioned so as to cut into both sides of the sawtooth 3'.

35 is the second feed lever 2 attached to the camshaft 5 described above.
When the roller 36 attached to the lever 29 comes into contact with the second cam attached to the second cam corresponding to the position shown in FIG. The grinding wheels 28, 28 have sawtooth 3'
When the roller 36 comes into contact with a high place, the grinding wheels 28, 28 are moved to the position indicated by the chain line in the same figure, that is, the position where the grinding wheels 28, 28 are removed from the saw teeth 3' as shown in FIG. The shape is determined as follows.

Reference numeral 37 denotes a feeder of the band saw 3 which is attached to the other lever shaft 6 facing upward as shown in Figure 4 of the drawings, and a feeder pin 38 that engages with the saw teeth 3' is rotated on this feeder 37 as shown in the same figure. It is movably mounted on a shaft 39.

Reference numeral 40 denotes a saw feed lever attached to the lever shaft 6 facing downward as shown in FIG. The shape of the cam 42 is similar to that of the feed pin 38 described above.
The setting is such that a reciprocating motion equivalent to one pitch of sawtooth is applied to the blade.

When polishing the side surface of the saw tooth 3' using the side surface polishing machine of the band saw shown in the embodiment, first, as shown in FIG. Loosen the adjustment plate 10 and attach it to the support shaft 11.
When the angle of depression of the grinding wheel holder 17 attached to the adjustment plate 10 by the support shaft 14 is rotated to the left in the figure as a center, the depression angle of the grinding wheel holder 17 increases; Since the inclination of the supported grinding wheels 28, 28 with respect to the saw teeth 3' is changed, the grinding wheels 28, 28 are moved to the saw teeth 3'.
In the case of Fig. 12 where the tip angle of the tooth is large, the tip angle is small.
In the case shown in Fig. 3, the inner circumference can be adjusted so that it is parallel to the tooth throat, so once this adjustment is completed, tighten the screw 13 to fix the adjustment plate 10 and the swing plate 8, and the motors 27, 27 When the first, second, and third cams 33, 35, and 42 are rotated by the cam shaft 5 while rotating the grinding wheels 28 and 28, the third cam 4
2 drives the saw feed lever 40 to send out the band saw 3 by means of the feed pin 38 pivoted to the feeder 37, sending the saw teeth 3' to the polishing position and returning them.

Then, the first cam 33 drives the first grinding wheel feed lever 16, and the fan-shaped swing plate 8 and the fan-shaped adjustment plate 1
0. Since the grinding wheel holder 17 is moved from the position shown by the solid line in Fig. 5 to the position shown by the chain line, the grinding wheels 28, 28 that were waiting behind the saw blade 3' are moved as shown in Fig. 10 of the drawing. As shown in FIG. 8, it moves to the position of the saw tooth 3' and advances in the direction of the arrow in the figure, and stops moving forward when it cuts into both sides of the saw tooth 3' as shown in FIG. At this time, the second cam 35 drives the second grinding wheel feed lever 29, and the small lever 30 is transmitted to the small lever 31 by the rod 32, and the grinding wheel holder 17 is moved to the position shown by the solid line in FIG. and move it toward the position shown by the chain line. Therefore, the grinding wheels 28, 28 move upward so as to slide parallel to the tooth throat of the saw tooth 3' as shown by the arrow in FIG. It comes off above 3'. Therefore, both sides of the sawtooth 3' are ground so that they are completely parallel when viewed from the front, and the width of the tooth throat is constant from the tooth tip to the tooth root, as shown in Figure 16 of the drawing. When viewed from above, due to the wedge angle given to the grinding wheels 28, 28, as shown in Fig. 15 of the drawing, the upper teeth have a drum shape with the desired relief angle, and the ground surface of the workpiece is smooth and beautiful, and the ground surface is smooth and curved. The sides are polished to a shape that is less likely to cause damage.

At this time, the third cam 42 moves backward to feed out the feeder 37 that hooks the feed pin 38 to the next sawtooth 3', and stops when the next sawtooth 3' is sent to the polishing position. At this time, the first cam 33 returns the grinding wheel holder 17 to the rear, and the second cam 35 moves it downward, so that the grinding wheels 28, 28 return to the standby position, and the grinding wheel holder 17 returns to the standby position. After being moved forward by the first cam 33, the second cam 3
5, the side surfaces are polished repeatedly, thereby uniformly polishing the side surfaces of all the saw teeth 3'.

Therefore, the band saw 3 whose side surface was polished by this polishing machine
When sawing wood using a sawtooth, the sides of the sawtooth 3' contact the sawn surface flatly, so the sawn surface is scraped smoothly and beautifully, and the direction of the sawtooth 3' is regulated by the line contact between the sawn surface and the side surface. This allows for smooth sawing of wood without bending.

(G) Effects of the Invention The band saw side polishing machine according to the present invention cuts into both sides of the saw tooth from the rear with a pair of grinding wheels that match the set width and set angle of the saw tooth, so that the grinding wheels are cut into both sides of the saw tooth so that the grinding wheels are aligned with the tooth throat and the grinding wheel. Since the saw blade is ground while being lifted up, the sides of the saw blade are perfectly parallel when viewed from the front, and the desired set angle when viewed from above. You can easily get a high-quality band saw that does not cause any damage.

When a grinding wheel that has been cut into a saw tooth is moved along the tooth throat until it comes off the saw teeth, each part of the grind wheel hits the saw teeth evenly and wears out uniformly, so dressing the grind wheel is unnecessary and time-consuming. The whetstone lasts a long time.

It has a unique effect.

[Brief explanation of drawings]

FIG. 1 is a front view showing a main part of an embodiment of a side polisher for a band saw according to the present invention, with the frame being longitudinally sectional. FIG. 2 is a side view of the same frame as above, broken away.
FIG. 3 is a plan view showing the structure of the grinding wheel holder, its support section, and drive section. FIG. 4 is a front view showing the structure and operation of the band saw feeding means same as above. FIG. 5 is a rear view showing the structure and operation of the first feeding means of the grinding wheel holder. FIG. 6 is a front view showing the structure and operation of the second feeding means of the grinding wheel holder. FIG. 7 to FIG. 10 are explanatory diagrams showing the same polishing state in an exploded manner. FIG. 11 is a rear view showing the structure and function of the inclination adjustment means of the grinding wheel. FIGS. 12 and 13 are explanatory diagrams in which the inclination of the grinding wheel is matched to the cutting edge angle of the saw tooth. FIG. 14 is a side view of a saw tooth whose side surface has been polished by the polishing machine of the present invention. FIG. 15 is a top view of the same as above. 1st
Figure 6 is a front view of the same as above. FIG. 17 is an explanatory diagram showing the state of sawn material by saw teeth whose sides have been polished by a conventional side polisher. FIG. 18 is an explanatory diagram showing the state of sawn material by the side polishing machine of the present invention. In the figure, 3' is a sawtooth, 28, 28 is a grinding wheel, 33,
16, 8, 10, 17 are first feeding means; 35;
29, 30, 32, 31, 17 are second feeding means, and 42, 40, 37, 38 are feeding means of the band saw 3.

Claims (1)

[Claims] 1. A pair of grinding wheels whose spacing and angle are set according to the setting of the saw teeth, and a first feeding means that advances these grinding wheels from a standby position behind the saw teeth to a grinding position to cut into both sides of the saw teeth. a second feeding means for raising a grinding wheel that has cut into both sides of the saw tooth so as to be parallel to the tooth throat of the saw tooth to perform grinding and remove the grinding wheel from the saw tooth; and when the grind wheel is not being ground.
A band saw side polishing machine for smooth sawing, characterized in that it is equipped with a saw feeding means for feeding the band saw and converting the grinding teeth.