JP2012135996A - Tip saw, and tip saw assembly - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tip saw and a tip saw assembly capable of reducing power required for cutting by reducing cutting resistance.SOLUTION: The tip saw 9 includes a disk shaped tip saw body, and a cutting tip 43 provided on an outer peripheral part of the tip saw body. The number of the cutting tips is set so that the number of the cutting tips existing in an effective cutting region along a rotation direction of the tip saw body at the same time is equal to or less than 2, and the number of the cutting tips throughout the entire periphery of the tip saw body is equal to or less than 6.

Description

The present invention relates to a tip saw and a tip saw assembly, and more particularly, a single tip saw is configured such that a plurality of cutting tips do not act simultaneously on an object to be cut, thereby reducing cutting resistance and power. It is related with what was devised so that reduction of can be aimed at.

For example, there is an sawdust machine for cutting wood to obtain sawdust. In this kind of sawdust machine, for example, a chip saw assembly 100 as shown in FIGS. 6 and 7 is used. Yes. First, there is a rotating shaft 101, and a plurality of (in this case, eight as shown in FIG. 6) chip saws 103 are fixed to the rotating shaft 101 in a stacked state. Cutting tip mounting portions 105 are projected and formed on the outer periphery of the tip saw 103 at a predetermined pitch in the circumferential direction. A cutting tip 107 is fixed to each of the plurality of cutting tip attachment portions 105.

Using the tip saw assembly 100 having the above-described configuration, the wood 111 to be cut is sequentially cut from the end, thereby obtaining sawdust. In addition, there exist patent document 1, patent document 2, patent document 3, etc. as what discloses the structure of this kind of chip saw or a chip saw aggregate.

JP 2009-255268 A JP 2008-307625 A Japanese Patent Laid-Open No. 10-175192

The conventional configuration has the following problems. That is, as shown in FIG. 6, when a single chip saw 103 is viewed, a plurality of cutting chips 107 fixed on the same circumference are configured to act on the wood 111 simultaneously. For example, in the case of the configuration shown in FIG. 5, eight cutting tips 107 act on the wood 111 simultaneously. Since there are eight tip saws 103, 8 × 8 = 64 cutting tips 107 act on the wood 111 simultaneously as a whole. As a result, at the time of cutting, a cutting resistance due to friction is generated between the cutting tip 107 and the wood 111, which is generated for the above 64 pieces, so that much power is required for cutting. There was a problem of doing.

The present invention has been made based on such points, and an object thereof is to provide a tip saw and a tip saw assembly capable of reducing cutting force and reducing power required for cutting.

In order to achieve the above object, a tip saw according to claim 1 of the present invention is a tip saw comprising a disc-shaped tip saw body and a cutting tip provided on an outer peripheral portion of the tip saw body. The number of cutting tips simultaneously existing in the effective cutting region along the rotation direction of the tip saw body is set to 2 or less, and the number is set to 6 or less on the entire circumference of the tip saw body. It is characterized by that. A chip saw assembly according to claim 2 is characterized in that a plurality of chip saws according to claim 1 are stacked and fixed, and at that time, the circumferential position is sequentially shifted by a predetermined pitch. Further, the tip saw assembly according to claim 3 is characterized in that, in the tip saw assembly according to claim 2, positioning through holes are formed at a predetermined pitch in the circumferential direction on the outer periphery of the tip saw. Is.

As described above, the tip saw according to claim 1 of the present invention is a tip saw including a disc-shaped tip saw body and a cutting tip provided on an outer peripheral portion of the tip saw body. The number of cutting tips simultaneously existing in the effective cutting region along the rotation direction of the tip saw body is set to 2 or less, and the number is set to 6 or less on the entire circumference of the tip saw body. Therefore, a large number of cutting tips do not exist at the same time in the cutting region of the workpiece, thereby reducing the cutting force and reducing the required power. Here, the point that the number is set so that a plurality of cutting tips do not exist simultaneously will be described. For example, when trying to cut an object to be cut with a single tip saw, normally, a plurality of cutting tips installed on the same circumference simultaneously act on the object to be cut. The contributing cutting tip is initially only one cutting tip related to the cutting object, and the cutting tip that simultaneously acts on the cutting object following that one cutting tip. Is not used for cutting at all, but rather is a major cause of cutting resistance due to the pressing force of the workpiece during cutting. The present invention focuses on such points. Further, the tip saw assembly according to claim 2 is configured such that a plurality of tip saws according to claim 1 are stacked and fixed, and the circumferential position is sequentially shifted by a predetermined pitch. To reduce the power required. Further, the tip saw assembly according to claim 3 is the tip saw assembly according to claim 2, wherein positioning holes are formed at a predetermined pitch in the circumferential direction on the outer peripheral portion of the tip saw. If the through holes are used, it is possible to easily construct a tip saw assembly having a desired configuration.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a top view which shows the structure of the sawdust manufacturing machine using a chip saw aggregate. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the 1st Embodiment of this invention, and is a side view which shows the structure of the sawdust manufacturing machine which uses a chip saw aggregate. It is a figure which shows the 1st Embodiment of this invention and is a side view of the principal part of a chip saw aggregate. It is a figure which shows the 1st Embodiment of this invention and is a front view of the principal part of a chip saw aggregate. 5A and 5B are views showing a second embodiment of the present invention, in which FIG. 5A is a side view of a chip saw, and FIG. 5B is a partial side view showing an enlarged portion b of FIG. 5A. . It is a figure which shows a prior art example, and is a side view of the principal part of a chip saw aggregate. It is a figure which shows a prior art example, and is a front view of the principal part of a chip saw aggregate.

Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view showing an overall configuration of a sawdust manufacturing machine 1 using a chip saw assembly according to the present embodiment, and FIG. 2 is a side view of the same. First, there is a base 1 on which a drive motor 3 is installed. A tip saw assembly 5 is installed on the base 1. The tip saw assembly 5 has a configuration in which a plurality of tip saws 9 are stacked and fixed on a rotating shaft 7. As shown in FIG. 1, the rotating shaft 7 is rotatably supported by bearing members 11 and 13.

A pulley 15 is fixed to the rotating shaft 7. On the other hand, a pulley 17 is also fixed to the rotating shaft 3 a of the drive motor 3. A belt 19 is wound around these pulleys 15 and 17. Therefore, by driving the drive motor 3, the rotary shaft 7, and thus the tip saw assembly 5 can be rotated via the pulley 17, the belt 19, and the pulley 15. The tip saw assembly 5 is covered with a cover 21, and a wood introduction port 25 into which the wood 23 to be cut is introduced, and a sawdust dropping port through which the sawdust 27 manufactured by cutting falls. 29 is formed.

A wood carry-in conveyor mechanism 31 is installed on the base 1. The wood 23 is sequentially carried into the wood introduction port 25 by the wood carry-in conveyor mechanism 31. Further, on the base 1, a sawdust carry-out conveyor mechanism 33 for carrying out the cut and dropped sawdust 27 is installed. The sawdust 27 cut and manufactured by the tip saw assembly 5 falls on the sawdust carry-out conveyor mechanism 33 and is conveyed.

A wood pressing roller 35 is installed on the wood carry-in conveyor mechanism 31 and in front of the wood introduction port 25. The wood 24 carried in by the wood pressing roller 35 is pressed.

Next, the configuration of the tip saw assembly 5 will be described in detail with reference to FIGS. 3 and 4. As already described, the tip saw assembly 5 has a structure in which a plurality of tip saws 9 are stacked and fixed. In this embodiment, as shown in FIG. 4, 40 chipsaws 9 are stacked and fixed. As shown in FIG. 3, each tip saw 9 has two cutting tip mounting portions 41, 41 protruding and formed at 180 °. Cutting tips 43 and 43 are detachably fixed to these two cutting tip mounting portions 41 and 41, respectively. Usually, in the case of this type of circular saw plate, a large number of cutting tips are attached at equal intervals in the circumferential direction. However, in this embodiment, as described above, a slight amount is placed at the opposite position of 180 °. The two cutting tips 43 and 43 are only fixed to each other.

Further, with respect to the above-described tip saw 9 in the present embodiment, the number of cutting tips 43 that exist simultaneously in the effective cutting region (the region indicated by symbol a in FIG. 3) along the rotation direction of the tip saw 9 is two or less. At the same time, the number of cutting tips 43 is set to be 6 or less on the entire circumference of the tip saw 9. As an example of a configuration that satisfies these two conditions, as described above, a configuration in which two cutting tips 43 and 43 are attached at a position of 180 ° is adopted. Incidentally, in the case of this embodiment, the area corresponding to the approximate diameter of the tip saw 9 is the effective cutting area because of the purpose of manufacturing sawdust.

In addition, a plurality of (for example, 40 in this embodiment) positioning through holes 45 are formed in the outer periphery of the tip saw 9. All 40 circular saw plates 7 have the same configuration.

When the 40 chip saws 9 are stacked and fixed, the positioning through holes 45 are inserted into the fixing knock pins 46 while sequentially shifting the 40 positioning through holes 45 one by one. The position is set. As a result, the position of the cutting tip 43 is configured to draw a spiral as shown in FIG.

Further, the relationship with the wood 23 that is the object to be cut will be described. In the region of the cutting height (h) of the wood 23, the number of cutting tips 43 that simultaneously contribute to cutting is set to nine.

The operation will be described based on the above configuration. As shown in FIG. 2, the wood 23 is pushed in the direction of the tip saw assembly 5 by the wood carry-in conveyor mechanism 31 with the tip saw assembly 5 rotated in the clockwise direction in the drawing. Thereby, the wood 23 is scraped off sequentially from the tip, and sawdust 27 is produced. The manufactured sawdust 27 falls on the sawdust carry-out conveyor mechanism 33 and is transported to another place.

The cutting action of the wood 23 by the tip saw assembly 5 will be described in detail.
Accordingly, some of the 40 chip saws 9 contribute to the cutting. As shown in FIG. 4, it corresponds to the width (b) of the wood 23, and for example, it is assumed that 30 chipsaws 9 in the center contribute to the cutting.

On the other hand, as described above, nine cutting tips 43 act simultaneously on the height of the wood 23 (indicated by symbol h in FIG. 2). In other words, among the 30 tip saws 9 already described, nine cutting tips 43 attached to any nine consecutive tip saws 9 act on the wood 23 simultaneously. Further, the arbitrary nine consecutive chip saws 9 are sequentially shifted among the thirty chip saws 9.

For example, in FIG. 4, among the 30 tip saws 9 in the center corresponding to the width (b) of the wood 23, the cutting tips 43 of the nine tip saws 9 continuous from the left initially acted on the wood 23. Assuming that the cutting tip 43 passes through the cutting region along the height (h) of the wood 23, the cutting tip 43 is sequentially removed from the tip saw 9 at the left end, and at the same time, the cutting tip 43 acting newly from the right side The prepared tip saw 9 enters. As a result, the cutting tips 43 of any nine consecutive tip saws 9 contribute to the cutting of the wood 23 at the same time. In this embodiment, the cutting depth (W, shown in FIG. 5) is determined by the height (h1) of the cutting tip 43.

As described above, according to the present embodiment, the following effects can be obtained. First, cutting resistance when cutting the wood 23 can be greatly reduced. This is configured by laminating and fixing the tip saw 9 having only two cutting tips 43 facing and arranged at a position of 180 °, whereby the number of cutting tips 43 simultaneously acting on the wood 23 is obtained. This is because the value is greatly reduced. Since the cutting resistance can be greatly reduced in this way, the power for rotationally driving the tip saw assembly 5 is also reduced, and the drive motor 3 can be downsized. In addition, since the positioning through holes 45 are formed in the outer periphery of the tip saw 9 at a predetermined pitch, the work of stacking and arranging the plurality of tip saws 9 by shifting one pitch at a time is also facilitated.

Next, a second embodiment of the present invention will be described with reference to FIG. In the case of the first embodiment, the tip saw assembly 5 in which 40 tip saws 9 are stacked and fixed has been described as an example. However, the present invention can also be applied to a cutting tool constituted by one tip saw 9. It is. In this case, cutting tips 43 are fixed at a position of 60 °, and a total of six cutting tips 43 are installed. Also in this case, the number of cutting chips 43 that exist at the same time is set to 2 or less in the effective cutting region (the region indicated by reference numeral a1 in FIG. 5) along the rotation direction of the tip saw 9. At the same time, the number of cutting tips 43 is set to 6 or less on the entire circumference of the tip saw 9. As an example of a configuration that satisfies these two conditions, as described above, a configuration is adopted in which one cutting tip 43 is attached at a position of 60 °, for a total of six. Incidentally, in the case of the second embodiment, it is assumed that, for example, the state in which the wood 23 is cut into two parts by one chip saw 9, and thus the cut wood passes through the tip saw 9. Therefore, the area above the rotating shaft 7 is the effective cutting area.

The cutting depth is determined by the height (h1) of the cutting tip 43 as shown in FIG.

Therefore, even with such a configuration, the same effect as in the case of the first embodiment can be obtained.

The present invention is not limited to the one embodiment. For example, in the case of the first embodiment, a chip saw assembly in which 40 chip saws are stacked and fixed is described as an example. However, the number is not particularly limited. Further, in the case of the first embodiment, a tip saw having two cutting tips facing and arranged at a position of 180 ° is described as an example, but the present invention is not limited to this. In short, the number of cutting tips simultaneously existing in the effective cutting area along the rotation direction is set to 2 or less, and the number is set so that it becomes 6 or less on the entire circumference of the tip saw body. If it is what is done. In addition, the illustrated configuration is merely an example.

The present invention relates to a tip saw and a tip saw assembly, and more particularly, a single tip saw is configured such that a plurality of cutting tips do not act simultaneously on an object to be cut, thereby reducing cutting resistance and power. For example, it is suitable for a chip saw used in a saw mill for manufacturing sawdust from waste materials.

5 Tip saw assembly 7 Rotating shaft 9 Tip saw 23 Wood 27 Sawdust 41 Cutting tip mounting portion 43 Cutting tip 45 Positioning through hole

Claims (3)

A tip saw comprising a disc-shaped tip saw body and a cutting tip provided on the outer periphery of the tip saw body, wherein the cutting tips are simultaneously present in an effective cutting region along the rotation direction of the tip saw body. A tip saw characterized in that the number of cutting tips to be cut is set to 2 or less and the number is set to be 6 or less on the entire circumference of the tip saw body. A plurality of chip saws according to claim 1, wherein a plurality of chip saws are stacked and fixed, and at that time, a circumferential position is sequentially shifted by a predetermined pitch. The tip saw assembly according to claim 2, wherein positioning holes are formed at a predetermined pitch in a circumferential direction on an outer peripheral portion of the tip saw.

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