JP3504351B2 - Wood saw - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wood saw, and more particularly to a wood saw capable of cutting wood without energy of the saw blade, and keeping the cut surface smooth to improve the precision and appearance of the product. Regarding the saw.

[0002]

2. Description of the Related Art Incidentally, saws used exclusively for sawing wood have two basic shapes of saw teeth.
One of them is that the thickness of the saw blade is uniform over the entire width, and when the saw blade deeply cuts into the wood during the lumbering work, the saw blade gets stuck in the kerf and cannot be pulled out. In order to avoid this, the saw blade of the saw blade is usually ground and shaped, and then tooth vibration processing is performed to make the spacing between the teeth arranged on the left and right sides of the alternate thickness direction larger than the thickness of the saw blade. By this, the cutting groove is widened so that the saw blade is not pinched and can be easily extracted. The other is almost similar to the above idea, but the thickness of the saw blade is formed to be narrower at the upper end and wider at the lower end, and two rows of left and right teeth are polished and formed on both side edges of the thickness side of the saw blade. As a result, the saw blade can be easily pulled out without being caught in the kerf, as in the above-mentioned conventional example, without performing the vibration processing.

6 and 7 are a front view of a saw blade of the latter wood saw of the above-mentioned conventional example and a schematic cross-sectional view at the time of cutting wood for explaining the saw blade. Is designed for saw plate 10 whose cross-sectional shape spreads from top to bottom (Fig. 6).
On the contrary, a plurality of main saw teeth 11 are machined and polished along both edges of the relatively thick end face of the saw plate 10, and a small number of sub saw teeth 12 of a predetermined proportion are regularly dispersed between the main saw teeth 11. (FIG. 6 shows only two teeth near the center). Then, the saw plate 10 of the main saw tooth 11 and the sub saw tooth 12 is provided.
Incised tooth surfaces 111, 111 and 121, 12 obliquely crossing the center line L3 on the side faces facing the thickness center line L1, respectively.
1 is processed and polished, and both incisal surfaces 111 on the same saw tooth
And 111 or 121 and 121, respectively, and intermediate ridges 112 and 122 are formed, respectively, and are further inclined toward the center line L1 across the upper ends of both incisal tooth surfaces 111 of each main saw tooth 11. The triangular slope 113 is machined and polished to form the slope 11.
3 improves the tooth top strength of the main saw tooth 11 and forms the highest point of the inclined surface 113 on the tooth crest 114 of the main saw tooth 11, and cuts the wood fiber by the tooth crest 114 and the both incisal tooth surfaces 111. If the processing and molding are completed, the main saw teeth 11 are formed on both side surfaces 10 of the end surface on the thickness width side of the saw plate 10.
The teeth should be arranged in parallel in two rows along the lines 1, 101. On the other hand, the auxiliary sawteeth 12 are provided with an outward slanting surface 123 on the outer side over the upper ends of both incisal tooth surfaces 121, and the outermost slanting surface 123 shown in FIG.
3 An inclined cutting surface 126 is formed between the point 125 on the right side and the right side.

Then, when the saw teeth 10 of the saw blade 1 are applied to the surface of the wood and ground in the right direction in FIG. 6, each cutting tooth surface in the tooth arrangement of the main saw teeth 11 arranged in parallel in two rows on the outermost side of the saw plate 10. The ridge line and the tooth crest 114 formed by 111 and both surfaces 101 of the saw plate 10 cut the wood fiber, while the cutting surface 126 of the auxiliary saw tooth 12 is inside the two rows of the main saw teeth 11 and thus the saw. When moving along with the sawing operation of the body 1, the main saw teeth 11 of the two rows are positioned at the bottom of the kerf.
Triangular wood residual part 13 between the teeth of
The output of the sawing operation is relatively reduced. However, in the conventional saw blade 1 of this kind, although the residual wood portion 13, which is not cut by the arrangement of the main saw teeth 11 parallel to each other in two rows, can be cut off at the same time by design, the auxiliary saw teeth 12 and the cutting surface 126 thereof. Does not have a sharp incisal surface 111 and a tooth crest 114 like the main saw tooth 11, and since there is still considerable resistance to saw cutting, the output of the saw operation can be reduced as expected. There is a problem that can not be done.

To solve this problem, the Applicant has previously developed a kind of novel saw blade structure for wood saw,
It was registered as a utility model for the Chinese mainland on August 16, 3rd, and its main structure is, as shown in FIGS. 8 and 9, a large number of parts along the thick side edge of the saw plate 20 of the saw blade 2. Sub saw teeth 22 are formed at a slight distance (in the figure, every two main saw teeth 21), that is, the main saw teeth 21 and the sub saw teeth 22 face the thickness width center line L2 of the saw plate 20, respectively. Inclining tooth surfaces 211, 211 and 22 that are oblique to each other
1 and 221 are provided, the left and right incisal surfaces 211 of the same saw tooth,
At the same time as forming intermediate ridges 212 and 222 between 221 and main surfaces 21 and 201 of the saw plate 20, main saw teeth 21 of a substantially oblique pyramid shape are formed. Therefore it to form the teeth mountain 213 and 223 of the sawing forward direction toward processed polished slope a (see Figure 9) you inclined to the center line L2 direction, the teeth of the main saw teeth 21 of the plurality of The ridges 213 are arranged on two parallel lines by vibrating, and the small number of the secondary saw teeth 22 are formed by bending the tooth ridges 223 by hammering, so that the center line of the saw blades 20 is more centered than the side surfaces 201. It is provided so as to slightly follow the direction of L2 and is positioned on a parallel line different from the straight line of the tooth crests 213 of the main saw tooth 21.

Then, as shown in FIGS. 8 and 10, when cutting wood using the improved saw blade 2, the cutting surface 211 of the main saw tooth 21 and the tooth crest 213 serve to cut the wood. Thus, the cutting surface 221 and the tooth peak 223 of the auxiliary saw tooth 22 which is curved in the direction of the center line L ₂ of the saw plate 20 and on a parallel line different from the cutting tooth surface 211 and the tooth peak 213 of the main saw tooth 21 are provided.
However, the wood fibers cut by the tooth crests 213 of the main saw teeth 21 are further finely cut, whereby the bonding strength of the wood fibers can be weakened. That is, by the sawing operation in which the tooth crests 213 of the auxiliary saw teeth 22 move forward, the fiber binding force of the triangular wood residual portion 23 remaining between the two parallel rows of the main saw teeth 21 at the bottom of the kerf is destroyed. It can be easily removed naturally and can achieve the purpose of cutting wood with more energy saving. In other words, “cutting” is more energy saving than “cutting”. Due to the design of the seed saw blade 2, the main saw teeth 21 and the auxiliary saw teeth 22 have respective cutting surface 21.
1, 221 and tooth crests 213, 223 both have a sharp cutting effect, and their directions are also the same, so that there is not much resistance when sawing, and the sawing operation is performed more significantly than the conventional sawtooth structure. It can be performed with reduced power.

However, although this type of saw blade 2 can solve the problem that the output of the sawing operation cannot be reduced as expected in use in the above-mentioned conventional saw tooth structure, it is still in use. There are the following problems. 1. The saw blade does not look good; a good saw blade 2 is formed by processing a metal sheet with a smooth surface, and the reflection state of light on the surface of the workpiece directly affects its appearance. In the prior art saw blade 2, the main saw teeth 21 and the auxiliary saw teeth 22 have tooth crests 213 and 223 arranged on different straight lines, so that the reflection directions of the light rays are scattered unevenly and the appearance is good. And the tooth flank 223 of the auxiliary sawteeth 22
It is not easy to make the stress applied to bend the tip toward the center line L ₂ constant for each auxiliary saw tooth 223, and even if it is made to be constant, the curved traces 224 of different shapes on the surface (Fig. 8) remains or the saw teeth are twisted and deformed so that the angle of the inward curve cannot be accurately matched, and further, the appearance of the curve mark 224 affects the appearance of the surface.

2. It is difficult to grasp the smoothness of the cut end of wood; for example, a curved trace 224 or deformation generated on the outer side surface of the auxiliary saw tooth 22 sometimes protrudes to the outside of the tooth crest 213 of the main saw tooth 21, and the protruding portion is As the saw blade moves, it rubs against the walls on both sides of the kerf, so the cut end of the wood tends to be uneven, and the energy-saving effect of the sawing operation is discounted. 3. It is difficult to hold the saw blade stably at the beginning of the grinding when the kerf has not yet been formed;
Since the tooth crests 223 of the main saw tooth 21 are arranged by being pushed and bent on a parallel line different from the tooth crests 213 of the main saw tooth 21, the sawing operation can be performed relatively energy-saving, but it is pressed toward the center line L _{2 of the} saw plate 20. Since it is relatively difficult to accurately match the curvature of the tooth crests 223 of each of the auxiliary saw teeth 22 to be bent, the tooth crests 223 of each auxiliary saw tooth 22 easily protrude from the linear array, and the saw blade 2 is stable at the beginning of grinding. The sawing effect is not so good because it affects the sex.

[0009]

SUMMARY OF THE INVENTION In view of the above problems of the conventional wood saw, the present invention is capable of sawing wood more energy-savingly and stably without twisting the saw blade and maintaining the smoothness of the cut end. And a saw for wood that can improve the precision and appearance of the product.

[0010]

To achieve the above object, according to the present invention, a plurality of main saw teeth and sub saw teeth are arranged every few teeth of the main saw teeth along both edges of the end face on the saw plate thickness width side. do it,
Main, to the saw tooth thickness width center line L3 facing side of the secondary sawtooth, to form both incisal surfaces to oblique one another centerline L3 closer, the top vertex on both incisal surface upper end of the same sawtooth tooth As a mountain, a slope that is inclined toward the center line L3 is straddled, and the tooth peaks of the main saw tooth are alternately toothed on both straight lines L4 and L5 that are parallel to each other on both sides of the center line L3. An inclined surface is formed on the side surface so as to form an acute included angle α with the outer surface of the main saw tooth and the sub saw teeth on both sides are constricted to each other, and the tooth peaks of the main and sub saw teeth are provided at substantially the same height. , And the tooth flanks and incisal surfaces of the auxiliary saw teeth are closer to the saw plate thickness width center line L3 than the tooth flanks and incisal surfaces of the main saw teeth.

Then, tooth flanks of the auxiliary saw teeth are swung on both straight lines L ₆ and L ₇ parallel to the straight lines L ₄ and L _{5 on} both sides of the sawtooth thickness center line L ₃ ; The slope of the auxiliary saw tooth is formed slightly higher than the slope of the main saw tooth, and the respective tooth peaks are provided at substantially the same height;
Left and right sub-saw teeth arranged in parallel in two rows such that one sub-saw tooth is provided next to the two continuous main saw teeth in the row of teeth that are swung to the left and right sides of ₃ respectively. It is even more preferable to position each of the main saw teeth on the opposite side of the center line L ₃ on the opposite side.

[0012]

According to the present invention constructed as described above, when sawing wood, the teeth of the main saw teeth are on the left and right parallel lines L4 and L5 of the center line L3 of the thickness of the saw plate, and the teeth of the auxiliary saw teeth are provided. Since the peaks are arranged on the parallel lines L6 and L7 which are relatively close to the center line L3, when the main saw teeth and the auxiliary saw teeth of the saw plate are applied to the wood surface and sawed, the saw plate does not bend relatively. Stable, while the cutting face and teeth of each saw tooth form a kerf while cutting the wood fibers to penetrate deeply into the wood, and each tooth in the tooth arrangement of each saw tooth is provided in the same direction, and In combination with the fact that the main saw blade cuts the wood fiber in the kerf and the auxiliary saw tooth can cut away the remaining wood portion that the main saw tooth does not cut, the saw cutting operation is relatively energy-saving, and each tooth of each saw tooth is also cut. Mountains should be polished on monotonous slopes such as slopes, incisors or slopes. Since it can be positioned relatively accurately on the straight lines L4, L5, L6, L7 on both sides of the sawtooth thickness centerline L3, if there is no trace of irregular curvature or deformation on the outer side surface of the auxiliary sawtooth, Moreover, the outer side surface of the auxiliary sawteeth does not protrude from the outer side surface of the main sawteeth, and the cut end of the wood can be kept extremely smooth.

The above and other objects, features and advantages of the present invention will become more apparent from the detailed description of the embodiments below with reference to the drawings.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, the saw blade 3 of a relatively preferred embodiment of the present invention has a flat saw plate 30 form, and the saw plate 30 is first manufactured by polishing during manufacturing. The saw plate 30 has a cross section that is narrowed upward and widened toward the lower end.
A plurality of main saw teeth 31 are formed along both edges of the end face on the thick width side by polishing to cut the wood fiber and form a kerf in the wood. Further, a predetermined proportional small number of sub-saw teeth 32 are further arranged between these main saw teeth 31 in an appropriate regular manner.
The small number of sub-saw teeth 32 are used to cut away the remaining triangular wood remaining in the kerf. Then, as in the conventional case, the main saw teeth 31 and the auxiliary saw teeth 32 are both saw plates 30.
Both incisal surfaces 311 and 31 that are oblique to each other near the center line L3
1, 321 and 321 are provided, and intermediate ridge lines 312 and 321 are provided between both incisal surfaces 311 and 321 of the same saw tooth, respectively.
322, and both incisal surfaces 311 and 311 and 32
1 and 321, the substantially triangular slopes 313 and 323 that are inclined toward the center line L3 of the saw plate 30 are polished to form each slope 3
13 and 323 are formed at the tops of the teeth 314 and 324,
Further, the tooth peaks 314 of the respective main saw teeth 31 are vibrated on both straight lines parallel to each other on both sides of the center line L3.

The feature of this embodiment is that the outer surface of the auxiliary sawteeth 32 is ground to form an acute included angle α with the outer surface of the main sawteeth 31 and the inclined surfaces 32 where the subsawteeth 32 on both sides are narrowed to each other.
5, the tooth profile 324 of the auxiliary sawteeth 32 and the cutting tooth surface 321 are formed on the tooth profile 314 of the main sawtooth 31.
Also, the cutting surface 311 is moved closer to the center line L ₃ of the saw plate 30. By design, the end of the beveled surface 325 stops at the tooth flank 324, but the beginning of the beveled surface 325 may be extended directly from the root 326 of the outer surface of the secondary sawteeth 32 to the tooth flank 324, if desired. Alternatively, the tooth root 326 may be extended from the root 326 to the tooth crest 324 at a ⅓ portion, or from another appropriate proportional portion.

Next, as shown in FIG. 3, the molding position of the slope 323 of the auxiliary saw tooth 32 is provided in a state of being protruded from the slope 313 of the main saw tooth 31 when viewed from the side, that is, the molding position is the saw tooth. Since it faces the narrowest tooth tip, the area of the molded triangular shape is relatively small, so
When the inclined surfaces 312 and 323 of the main and auxiliary saw teeth 31 and 32 are provided on the same level surface, since the area of the main saw tooth 31 is relatively large, the tooth crest 314 at the highest point is the auxiliary saw tooth 3.
This is because it protrudes from the second tooth crest 324. On the other hand, if the slope 323 of the auxiliary saw tooth 32 is too small and there is concern about the mechanical strength, even if the tooth width of the auxiliary saw tooth 32 is increased. Good. Then, since the molding position of the slope 323 is further raised, the tooth crests 324 of the auxiliary saw teeth 32 are formed in the main saw teeth 3
As shown in FIG. 5, the tooth flank 324 is positioned in the residual wood portion 41 area between the tooth flanks 314 of the left and right main saw teeth 31, respectively, as shown in FIG. 41 can be excised, if there is a secondary serration 3
If the second inclined surface 323 is provided at the same level as the tooth profile 314 of the main saw tooth 31, the tooth profile 324 of the secondary saw tooth 32 cannot be positioned on the residual wood portion 41.

Further, as shown in FIGS. 1 and 4, the main saw teeth 31 and the sub saw teeth 32 of this embodiment are arranged on both sides of the thickness center line L _{3 of the} saw plate 31, and the teeth of the sub saw teeth 32 are arranged. Mountain 324
Are formed relatively close to the center line L ₃ , and each tooth arrangement is arranged in two rows in parallel with each other by interposing one continuous saw tooth 31 and one sub saw tooth 32. The tooth ridges 324 of the left and right auxiliary saw teeth 32 are respectively positioned so as to correspond to the middle of both main saw teeth 31 in the tooth arrangement on the opposite side across the center line L ₃ .

Subsequently, as shown in FIGS. 4 and 5, when cutting wood using this embodiment, the tooth crests 3 of the main saw teeth 31 are used.
14 is on each of the straight lines L4 and L5, and the tooth profile 324 of the auxiliary sawteeth 32 formed by the polishing process is easier to control the processing accuracy (because only the slope polishing process is performed and there is no push bending process). From the center line L3
Can be located on both straight lines L6, L7 close to
When 2 is applied to the surface of the wood and sawed, the saw plate 30 has a relatively stable and stable effect from the beginning of the sawing, and when further sawed, the incisal surfaces 311 and 321 and the tooth ridges 314 and 324 are obtained.
Cutting the wood fibers to form the kerf 4 to penetrate deeply into the wood, and the tooth ridges 314 and 324 of the main saw tooth 31 and the sub saw tooth 32 in each tooth arrangement of this embodiment are provided in the same direction. From the above, the sawing operation is relatively energy-saving, and the residual wood portion 41 which is not cut by the tooth crest 314 of the main saw tooth 31 at the inner bottom portion of the cutting groove 4 is cut by the tooth flank 321 and the tooth crest 324 of the auxiliary saw tooth 32. As a result, the residual wood portion 41 can be cut smoothly under the condition that the fiber strength of the wood is further weakened. That is, in this embodiment, the inclined surface 325 is formed on the outer surface of the auxiliary sawteeth 32 by polishing.
And the slope 323 of the auxiliary sawteeth 32 is appropriately raised above the slope 313 of the main sawteeth 31, the tooth crests 324 of the auxiliary sawteeth 32 are brought closer to the center line L3 of the saw plate 30. There is a feature that the saw tooth 31 can be maintained at substantially the same level as the tooth crests 314, so that the sawing operation can be performed with energy saving.

Of course, even if the tooth crests 324 of the respective auxiliary saw teeth 32 are arranged on different straight lines, the sawing operation can be performed with energy saving, and the precision and appearance of the product can be maintained. Also, depending on the required mechanical strength of the auxiliary sawteeth 31 , the auxiliary sawteeth 3
The molding level of the second slope 323 is the tooth level 314 of the auxiliary sawteeth 31.
It may be raised or the same level or submerged rather than the sub sawteeth 32. If the sub saw teeth 32 are simply strengthened in mechanical strength, it is better to slightly submerge them.

[0020]

The present invention configured as described above has the following effects. 1. The saw blade has a relatively good appearance; since the main saw teeth and the auxiliary saw teeth of the present invention are formed by polishing, not only the outer surface inclinations of the respective main saw teeth match very accurately, but also the inclined surfaces of the respective sub saw teeth are Since the matching can be made extremely accurately, the reflected light flux of light can be easily regulated without being scattered, and the appearance is better than that of the conventional one having a non-uniform surface, and the precision and value of the product can be improved.

2. The smoothness of the cut of wood is relatively easy to grasp; the tooth peaks in the saw blade of the present invention are relatively accurately ground by polishing, and straight lines L ₄ , L ₅ , L ₆ , and L _{7 on} both sides of the center line L ₃ of the saw plate.
Since it can be positioned above, the outer surface of the auxiliary sawteeth does not have a mark of irregular curvature or deformation, and the outer surface of the auxiliary sawteeth does not protrude from the outer surface of the main sawteeth, so that the saw blade When performing a sawing operation, it is the orderly arranged main saw teeth that directly contact and rub against both side walls of the kerf, and the cut edge of the wood to be sawed under such a condition is extremely smooth, The present invention is the reason why the cut end of the wood is surely kept smooth to improve the precision and appearance of the product, and the output in the sawing operation can be saved.

3. The stability of the saw blade at the beginning of sawing is good; as described above, since the inclined surface is formed on the auxiliary saw tooth by the polishing process, the tooth peaks of the auxiliary saw tooth must be positioned exactly on the same straight line. Therefore, it is possible to reduce the left and right bends of the saw blade during sawing and improve the stability of the saw blade at the beginning of sawing.

[Brief description of drawings]

FIG. 1 is an orthographic view of a relatively preferred embodiment of the present invention.

FIG. 2 is a sectional view taken along line VII-VII in FIG.

FIG. 3 is a state display diagram in which a main saw tooth and a sub saw tooth in the above-described embodiment are enlarged in a superimposed manner.

FIG. 4 is a view showing the arrangement of main saw teeth and sub saw teeth in the above embodiment.

FIG. 5 is a cross-sectional view showing sawing wood according to the above embodiment.

FIG. 6 is a front view of a conventional wood saw.

FIG. 7 is a cross-sectional view of a conventional wood saw used for cutting wood.

FIG. 8 is a front view of another type of conventional wood saw.

9 is a sectional view taken along line IV-IV in FIG.

FIG. 10 is a cross-sectional view of a wood piece being cut by another wood saw.

[Explanation of symbols]

30 saw plates 31 Main saw tooth 32 secondary saw teeth 311, 321 incisal surface 312,322 Intermediate ridge 313, 323 slope 314, 324 Tooth crest

Claims (4)

(57) [Claims] 1. A plurality of main saw teeth (31) and sub saw teeth (32) are arranged at intervals of several teeth along the both side edges of the end face on the thickness side of the saw plate (30), The main and sub saw teeth (3
To the saw teeth (30) Atsuhaba centerline L3 facing sides of 1,32), both incisal surfaces obliquely intersect each other in the center line L3 toward (3
11, 321) to form the same saw teeth (31, 32)
At the upper end of both incisal tooth surfaces (311, 321) of the
14, 324) straddling slopes (313, 323) inclined toward the center line L3, and the main saw teeth (31).
Tooth flanks (314) are alternately vibrated on both straight lines L4 and L5 parallel to each other on both sides of the center line L3, and the outer surface of the auxiliary saw tooth (32) is sandwiched at an acute angle with the outer surface of the main saw tooth (31). An inclined surface (325) is formed such that the auxiliary saw teeth (31 , 32 ) on both sides form an angle α and are narrowed to each other, and the tooth peaks (314, 324) of the main and auxiliary saw teeth (31) are substantially the same. Provided at the height, the tooth crest (324) and the incisal surface (3) of the auxiliary sawteeth (32).
21) A saw for wood configured such that 21) is brought closer to the thickness center line L3 of the saw plate (30) from the tooth crests (314) and the incisal surface (311) of the main saw tooth (31). 2. A straight line L ₆ parallel to the tooth crests (324) of the auxiliary sawteeth (32) between the straight lines L ₄ and L _{5 on} both sides of the thickness center line L _{3 of the} saw plate (30). The saw for wood according to claim 1, which is formed by vibrating on L ₇ , L ₇ . 3. The slope (323) of the auxiliary saw tooth (32) is formed slightly higher than the slope (313) of the main saw tooth (31) so that the respective tooth peaks (324, 314) are at substantially the same height. The saw for wood according to claim 1, which is provided. 4. A secondary saw tooth (32) is provided next to two continuous main saw teeth (31) in a row of teeth that are vibrated on the left and right sides of the thickness center line L ₃ of the saw plate (30). Left and right auxiliary saw teeth (32) arranged in parallel in two rows
2. The saw for wood according to claim 1, wherein the respective tooth peaks (324) are positioned between both main saw teeth (31) of the tooth arrangement on the opposite side with the center line L ₃ therebetween.