JPH0727802U - Circular saw assembly for multi-row circular saw machine - Google Patents

Abstract

(57) [Summary] [Purpose] In a circular saw assembly for a multi-row circular saw machine in which a large number of circular saws are arranged on the same axis, noise generated during idling of the multi-row circular saw machine circular saw assembly is reduced. A circular saw assembly that holds at a low level is provided. [Structure] A multi-row circular saw machine is provided by forming holes in the main body of each circular saw that constitutes a circular saw assembly for a multi-row circular saw machine, and combining circular saws having different sizes, shapes, and numbers of these holes. A circular saw assembly for use.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a multi-row circular saw machine generally called a gang used in a woodworking machine, and in particular, a multi-row circular saw machine having a large number of circular saws arranged on the same axis used in the multi-row circular saw machine. The present invention relates to a circular saw assembly for a multi-row circular saw machine that prevents the generation of resonance noise when the wheel spins.

[0002]

[Prior art]

 As shown in FIG. 10 or FIG. 11, a circular saw 1 composed of a main body 2 and a tooth body portion 3 on the outer peripheral portion thereof, which is used in ordinary woodworking, rotates at a particularly high speed during rotation. At this time, an air flow called a Karman vortex is generated behind the tooth body portion 3 of the circular saw 1. This Karman vortex normally vibrates a high-speed rotating circular saw, and this high-speed rotating circular saw generates a large resonance sound, and such a large ringing noise deteriorates the working environment. Is known to exist.

In order to prevent the generation of such a resonance sound, conventionally, in order to improve the vibration damping property of the circular saw body, as shown in FIG. The groove 4 is cut toward the inside, and a material different from a circular saw material such as resin is packed in the inner end portion 5 thereof, and further, a split groove 6 is provided in the main body 2 portion, and a part 7 of the split groove 6 is provided. Similarly, it is known that a material different from the circular saw material such as resin is packed in the same to prevent the resonance of the main body 2 which causes a resonance sound. Further, instead of providing the split groove 6 in the main body 2, as shown in FIG. 11, a plurality of windows 8 are punched out in the main body 2 to prevent resonance of the main body 2 which causes a resonance sound. Is also known.

Since this is used in a multi-row circular saw machine or the like, the same is true in the case of a circular saw set solid body in which a large number are arranged on the same axis. That is, up to now, all of the circular saws of the circular saw assembly arranged on the same axis for use in a multi-row circular saw machine or the like are provided with the same resonance preventing means as described above. Moreover, for the circular saw assembly used in the conventional multi-row circular saw machines and the like, only circular saws having the same shape (for example, the shape shown in FIG. 10) are specified for convenience of handling or easy management. The same number of sheets are used side by side, and for example, the circular saw shown in FIG. 10 and the circular saw shown in FIG. 11 were not used in combination.

[0005]

[Problems to be solved by the device]

 Up to now, as mentioned above, the series of circular saws used in a multi-row circular saw machine etc. all use circular saws of substantially the same shape. I had taken preventive measures. That is, it was generally thought that the resonance sound generated by a plurality of circular saws arranged on the same axis would be reduced as a whole by reducing the resonance sound generated by each circular saw.

However, upon examining the individual work situations in detail, it was found that such an idea is not always correct. For example, when the same resonance prevention means is applied to circular saws of the same shape, and when the resonance noise during idling is reduced by a predetermined value (A decibel), N pieces of the same shape and the same resonance prevention means are applied. In a multi-row circular saw machine using a circular saw, the resonance sound is hardly reduced by N times compared to the case where the resonance prevention means is not applied, and in many cases, the resonance sound is not reduced. It turned out to be less than this.

As a result of various studies on the reason for this, the applicant arranged a large number of circular saws on the same axis at intervals even when the resonance sound of the circular saw alone decreased by a predetermined value during idling. In the case of a multi-row circular saw woodworking machine, a standing wave of air vibration is generated between the saws, which causes a resonance sound that is different from the case of the circular saw alone. They have found that it is difficult to prevent the resonance noise of the entire circular saw assembly used in a multi-row circular saw machine, even if the individual circular saws used are provided with resonance preventing means.

Therefore, the present invention provides a new means for preventing resonance when a large number of circular saws are simultaneously rotated, by means different from the means for preventing the occurrence of resonance noise in the individual circular saws during idling. The purpose is to do.

[0009]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a plurality of circular saws used in a multi-row circular saw machine with circular holes of different sizes, positions, numbers, and shapes in the respective main body portions, and these circular holes are mutually provided. By arranging them in combination, the resonance sound generated by multiple circular saws used in a multi-row circular saw machine or the like is greatly reduced.

[0010]

[Action]

 According to the present invention, since various circular holes are provided in the main body of the plurality of circular saws, a complicated air flow is added between the circular saws, and a stationary wave of air vibration is not easily generated between the saws. Become . In addition, since the size, position, number, shape, etc. of the circular holes are combined differently between the adjacent circular saws, a stationary wave of air vibration is further reduced between the saws.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, as shown in FIG. 1, a circular saw 10 having a diameter of 203 mm, a blade thickness of 2.2 mm, a main body thickness of 1.6 mm, a hole diameter of 80 mm, and a number of blades of 100 is attached to the central portion of the main body portion 12. Holes 14 and a tooth body portion 16 for cutting on the outer peripheral portion of the body portion 12, and the body portion 12 is spaced from the tooth body portion 14 by 90 ° toward the center. Seventeen circular saws 10 were prepared by cutting four grooves 18 and filling the inner end portion 20 with a material different from the circular saw material such as resin or aluminum. These circular saws 10 were arranged uniaxially with a spacing of 50 mm from each other to form a circular saw assembly 22. The circular saw assembly 22 was rotated at a speed of 4000 rpm. The resonance sound at this time was about 2850 Hz, and the noise amount was 94.5 decibels, and an extremely loud annoying noise was detected.

Next, another circular saw 24 having the same size and shape as the circular saw 10 shown in FIG. 1 is prepared, and among the four grooves 18 provided in the main body portion thereof, the grooves adjacent to each other are provided. A circular saw 24 as shown in FIG. 2 was prepared in which a pair of punched holes 26 having a diameter of 25 mm were formed between 18 at positions opposed to each other in the diametrical direction.

Furthermore, another circular saw 28 having the same size and shape as the circular saw 10 as shown in FIG. 1 is prepared, and a diameter is provided between four adjacent grooves 18 provided in the main body portion of the circular saw 28. A circular saw 28 as shown in FIG. 3 was formed in which two pairs of punched holes 30 having a diameter of 25 mm were formed at positions facing each other.

Then, as shown in FIG. 4, these circular saws 10, 22, 34 are arranged in a row from the left in the same order as the circular saws 24, 28, 10 in the same manner as described above with 17 sheets, each with a 50 mm spacer. And were rotated at a speed of 4000 rpm in the same multi-row circular saw as above.

The amount of noise at this time was 81.8 decibels, and a decrease in the amount of noise of 12.7 decibels was measured as a whole, and it was observed that the offensive resonance was eliminated.

5 and 9 show another embodiment. In this embodiment, first, a circular saw 40 having a diameter of 305 mm, a blade thickness of 2.2 mm, a main body thickness of 1.6 mm, a hole diameter of 80 mm and a number of blades of 100, is attached at the center of the main body portion 42 for mounting. A hole 44 is provided, and a tooth body portion 46 for cutting is provided on the outer peripheral portion of the body portion 42, and the body portion 42 is spaced from the tooth body portion 46 by 90 ° toward the center. Twelve circular saws 40 were prepared by cutting the individual grooves 48 and filling the inner end portion 50 with a material different from the circular saw material such as resin. These circular saws 40 were uniaxially arranged at a distance of 80 mm from each other via spacers to form a circular saw assembly 52, and the circular saw assembly 52 was rotated at a speed of 4100 rpm. The resonance sound at this time is about 3600 Hz, and the noise amount is 101. At 6 decibels, I sensed an extremely loud annoying noise.

Next, another circular saw 54 having the same size and shape as the circular saw 40 as shown in FIG. 5 is prepared, and is provided between the four adjacent grooves 48 provided in the body portion thereof. A circular saw 54 as shown in FIG. 6 was prepared in which two pairs of punched holes 56 having a diameter of 40 mm were formed at positions facing each other in the diameter direction.

Further, another circular saw 58 having the same size and shape as the circular saw 40 as shown in FIG. 5 is prepared, and a diametrical direction is provided between four adjacent grooves 48 provided in the main body portion thereof. A circular saw 58 as shown in FIG. 7 was formed in which three pairs of punched holes 60 having a diameter of 40 mm were formed at positions facing each other.

Furthermore, another circular saw 62 having the same size and shape as the circular saw 40 shown in FIG. 5 is prepared, and a diameter is provided between four adjacent grooves 48 provided in the main body portion of the circular saw 62. Four pairs of punched holes 64 having a diameter of 30 mm are provided at positions facing each other, and two pairs of punched holes 66 having a diameter of 40 mm are provided between the holes 64 in the main body portion defined by the groove 48. The formed circular saw 62 shown in FIG. 8 was created.

Next, as shown in FIG. 9, these circular saws 54, 58, 62 are arranged in the order of three saws from the left in the order of the circular saws 58, 62, 54, 62 in the same manner as described above, and each of them has a spacer of 80 mm. And arranged in a single row through the above, and rotated at a speed of 4100 rpm in a multi-row circular saw machine similar to the above.

The amount of noise at this time was 95.8 decibels, and it was observed that the noise volume reduction of 5.8 decibels as a whole was measured, and that the jarring resonance sound was also eliminated.

As a result of the above-mentioned experiments by the applicant and various other experiments, it was found that the circular saw assembly of the present invention has the following phenomenon.

1) Rather than arranging different types of circular saws for each one as in the first embodiment, as shown in the second embodiment, a set of two or three circular saws of the same type is used. By arranging them, the noise prevention effect becomes large.

2) In both cases of Example 1 and Example 2, when the magnitude of each frequency component is examined by FFT, a large level frequency component that becomes a resonance sound disappears, and a small level Many frequency components can be seen.

3) A similar effect was provided regardless of the diameter of the circular saw.

4) The shape of the hole formed in the main body of the circular saw provides the same effect regardless of whether it is a circular hole, a long groove or the like.

5) When the shape of the holes formed in the main body of the circular saw is the same, the same effect can be provided by changing the size or number of the holes.

[0028]

[Effect of device]

 According to the present invention, the main body portion of the circular saw is subjected to a simple process, for example, a hole having a simple shape having a different size or number is formed, and the circular saw having a different size or number of the holes is arranged in combination. As a result, it is possible to provide a circular saw for a multi-row circular saw, which can eliminate annoying resonance noise and can significantly reduce noise, and can greatly contribute to improving the working environment.

[Brief description of drawings]

FIG. 1 is a plan view showing one circular saw constituting a circular saw assembly for a multi-row circular saw machine according to a first embodiment of the present invention.

FIG. 2 is a plan view showing another circular saw constituting a circular saw assembly for a multi-row circular saw machine according to the first embodiment of the present invention.

FIG. 3 is a plan view showing still another circular saw constituting the circular saw assembly for a multi-row circular saw according to the first embodiment of the present invention.

FIG. 4 is a view showing the structure of a circular saw assembly for a multi-row circular saw machine according to the first embodiment of the present invention.

FIG. 5 is a plan view showing a circular saw constituting a circular saw assembly for a multi-row circular saw machine according to a second embodiment of the present invention.

FIG. 6 is a plan view showing one circular saw constituting a circular saw assembly for a multi-row circular saw machine according to a second embodiment of the present invention.

FIG. 7 is a plan view showing another circular saw constituting a circular saw assembly for a multi-row circular saw machine according to a second embodiment of the present invention.

FIG. 8 is a plan view showing still another circular saw constituting a circular saw assembly for a multi-row circular saw machine according to a second embodiment of the present invention.

FIG. 9 is a view showing the configuration of a circular saw assembly for a multi-row circular saw machine according to the first embodiment of the present invention.

FIG. 10 is a plan view showing a known circular saw.

FIG. 11 is a plan view showing another known circular saw.

[Explanation of symbols]

10: Circular saw 12: Main body portion 14: Hole 16: Tooth body portion 18: Groove 20: Inner end portion 22: Circular saw assembly 24: Circular saw 26: Hole 28: Circular saw 30: Hole 40: Circular saw 42: Main body 44: Hole 46: Tooth body 48: Groove 50: Inner end 52: Circular saw assembly 54: Circular saw 56: Hole 58: Circular saw 60: Hole 62: Circular saw 64: Hole 66: Hole

Claims (3)

[Scope of utility model registration request] 1. A circular saw assembly for a multi-row circular saw machine in which a large number of circular saws are arranged on the same axis, wherein holes are provided in the main body of each circular saw, and the size, shape, and number of these holes are set. A circular saw assembly for a multi-row circular saw machine with different circular saws arranged in combination. 2. The circular saw assembly for a multi-row circular saw machine according to claim 1, wherein circular saws having holes different in at least one of size, shape and number are continuously arranged one by one. 3. A circular saw having a plurality of groups having holes of the same size, shape, and number, wherein the size, shape, and number of holes formed in each group of circular saws are different from each other. The circular saw assembly for a multi-row circular saw machine according to claim 1, wherein a plurality of groups are continuously arranged for each group.