JP2000061726A - Sound arrester for hot sawing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound arrester for a hot sawing machine for reducing a high-frequency sound generated in cutting a hot-rolled shape steel, and preventing the diffusion of noise to a periphery. SOLUTION: This device is comprized by enclosing the range of the reciprocative movement of the saw blades of a sawing machine and a hot sawing machine, and a carrying table for the sawed material of the hot sawing machine, by a soundproofing hood 7 thereto noncombustible acoustic material is fitted to the inner side, providing a soundproofing door for opening/-closing an opening part for carrying-in/-out the sawing material 4 of the hood 7, and covering the overall length of a trench provided on the lower part of the carrying path of the sawing material in the hood 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproofing device for a hot sawing machine, which reduces high-frequency noise generated when cutting a hot-rolled shaped steel and prevents the noise from spreading to the surroundings. Is.

[0002]

2. Description of the Related Art Generally, when a shaped steel is manufactured by rolling, it is necessary to cut off the crop ends at both ends of the rolled material, cut to obtain a required product length, and to collect a sample for confirming the cross-sectional dimension of the product. A hot saw is used for cutting. As shown in FIG. 7, this hot saw cutting machine comprises a saw blade 1, a motor 2, and a horizontal moving device 3 of a saw blade rotation driving device, and is used to convey a sawing material 4 to a cutting position. Ancillary equipment includes a transport table consisting of the transport roller 5, a sizing machine for stopping the material at a predetermined position on the transport table, and a device for unloading cut crops and samples from the transport table. I have it.

By the way, during cutting of the sawing material by the sawing machine, the highest level of harmful noise is generated in the high frequency band around 4000 Hz. There is a high possibility that hearing loss is likely even with protective equipment.

As a method of solving such a problem, it is conceivable to cover the sawing portion, which is the sound source, with a soundproof hood, and reduce the noise level outside the hood due to the transmission loss of the hood. .

[0005]

However, the method of simply covering the saw cut portion with the soundproof hood has the following problems.

It is necessary to provide an opening for loading and unloading the sawing material on the soundproof hood, and noise leaks from this opening, and the noise level outside the soundproof hood is not sufficiently reduced.

A trench for collecting the scale that falls during rolling and transportation of the material by flushing is formed in the base of the lower portion of the sawing material transportation table. Noise leaks out of the soundproof hood through the trench, and the noise level outside the soundproof hood does not sufficiently decrease.

It is necessary to provide an opening in the soundproof hood to take out the cut crop or sample. Noise leaks out of the soundproof hood from this opening, and the noise level outside the soundproof hood does not sufficiently decrease.

Since the sharpness of the saw blade deteriorates with repeated use, it is necessary to periodically replace it with a sharpened saw blade. The soundproof hood must be removed during replacement, which requires a lot of man-hours.

Since the shape of the crop ends at both ends of the sawing material changes depending on the rolling conditions, it is necessary for the operator to confirm the stop position of the material. In addition, it is necessary to confirm that the material is completely cut after the sawing and before carrying out the sawing material. The soundproof hood makes these confirmations impossible.

It is an object of the present invention to provide a soundproof device for a hot saw cutter capable of preventing noise leakage and confirming the sawing position and condition.

[0012]

The present invention achieves the above object by the following device.

In the first apparatus, the hot saw and the saw blade and the range in which the saw blade reciprocates and the table for conveying the sawing material are enclosed by a soundproof hood having a nonflammable sound absorbing material inside. A soundproof door is provided for opening and closing the opening through which the sawing material of the soundproof hood is loaded and unloaded, and a steel sheet covers the entire length of the trench provided under the transport path of the sawdust material in the soundproof hood. It is a soundproofing device for a hot saw cutter.

Since the soundproof hood is provided with a soundproof door that opens and closes the opening for loading and unloading the sawing material, when loading or unloading the sawing material, the soundproof door is opened to cut the sawing material. At this time, by closing the soundproof door, it is possible to prevent noise from leaking from the opening.

FIG. 8 shows the noise reduction distribution of the surroundings before and after the installation of the hood when the noise source is covered by the tunnel hood (Source: Ohmsha, S. Morita, "Noise"). And noise prevention "). From the figure, it can be seen that if the length L of the tunnel is increased, the volume of noise reduction around the tunnel increases. In this device, the conveying table for the left and right sawing materials of the sawing machine is covered with a soundproof hood to increase the tunnel length, so that the volume of noise around the soundproof hood can be further increased. .

A second device is the same as the first device except that an opening for replacing the saw blade is provided in the soundproof hood, and a soundproof door that can be opened and closed is provided in this opening.

With this soundproof door that can be opened and closed, the saw blade can be replaced without removing the soundproof hood.

A third device is the same as the first or second device, except that a soundproof door which can be opened and closed is provided at the opening of the soundproof hood for taking out the sample piece of the sawing material.

It is possible to prevent noise from leaking by closing the soundproof door at the time of sawing. The fourth device is
In the third device, the soundproof hood is provided with a rotatable soundproof door that shields the cross section of the discharge shoe at the exit of the crop discharge shoe.

It is possible to prevent noise from leaking by closing the soundproof door at the time of sawing. The fifth device is
In the fourth device, a camera for monitoring the sawing position is provided in the soundproof hood.

With this monitoring camera, it is possible to confirm the stop position and cutting status of the material.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of the device of the present invention, FIG. 2 is a plan view of the device of the present invention, and FIG. 3 is a right side view of the device of the present invention.
Reference numeral 5 denotes a conveyor roller which constitutes a conveyor table. The sawing material 4 hot-rolled by the shape rolling mill is conveyed to a conveyor roller in FIG.
Transported from right to left by la 5. Reference numeral 1 is a saw blade, 2 is a motor which is a rotary drive device of the saw blade 1, and 2a is a means for transmitting a rotary drive force of the motor. The motor 2 and the transmission means 2a are mounted on the same base, and reciprocate in a direction (direction of arrow a) orthogonal to the carrying table by a reciprocating means (not shown). By this reciprocating movement, the saw blade 1 moves toward the shaped steel which is the sawing material at the cutting position 6, and returns to the retracted position at the rear after cutting. The hot saw cutting machine includes a motor 2 and a conduction means 2.
a, saw blade 1 and reciprocating means for these.

A sample transfer device 13 is provided in front of the cutting position 6.
Is provided. The sample carrying device 13 moves to a cutting position, receives a sample obtained by cutting the shaped steel 4 with a hot sawing machine, and carries it out to a retreat position outside the carrying table.

As shown in FIGS. 3 and 6, the cutting position 6
A gutter-shaped crop discharge shoe 18 is provided below the. This is to transfer the crop ends at both ends of the shaped steel cut by the hot sawing machine to a crop bag 22 provided outside the transport table. In addition, the bottom of the transport table has a trench 20 for recovering the scale that falls during rolling and transport of the material by flushing.
Are formed.

Next, a description will be given of the hot-saw cutting machine configured as described above and the soundproofing device provided in the accessory equipment.

Reference numeral 7 is a soundproof hood in which a nonflammable sound absorbing material is attached to the inner surface of the steel plate. This soundproof hood 7 covers the range of reciprocating motion of the hot saw and the saw blade 1 of the saw, and the predetermined length of the left and right sawing material conveying tables of the hot saw. It is covered with soundproof hoods 7a and 7b.

In order to replace the saw blade, the soundproof hood 7 is provided with an opening on the left side and an opening on the ceiling following it. In order to prevent noise from being leaked from these openings during sawing, a single-sided soundproof door 11a is provided in the openings on the left side surface. In addition, the soundproof door 1 that opens and closes in the left-right direction by the fluid cylinder 12 is provided at the opening of the ceiling.
1b is provided. The soundproof doors 11a and 11b are
Open only when replacing the saw blade, otherwise close.

In addition, an opening 14 is formed in the front wall of the soundproof hood 7 for the sample carrying device 13 to enter and exit. In order to prevent noise from flowing out, as shown in FIG. 3, a soundproof door 15 which is opened and closed in the vertical direction by a fluid cylinder 17 is provided in the opening 14. Soundproof door 1
5 is opened only when the sample carrying-out device 13 goes in and out, and is closed at other times.

The right side wall of the soundproof hood 7a is provided with an opening 8a for allowing the sawing material to enter the soundproof hood. The left side wall of the soundproof hood 7b is provided with an opening 8b through which the cut sawing material exits from the soundproof hood. A soundproof door 9a is provided in the opening 8a, and the soundproof door 9a opens and closes the opening 8a in the vertical direction by a fluid cylinder 16a, as shown in FIG. A soundproof door 9b is provided in the opening 8b, and the soundproof door 9b opens and closes the opening 8b in the vertical direction by a fluid cylinder 16b. The soundproof door 9a is opened only when the sawing material is carried into the soundproof hood, and is closed otherwise. Further, the soundproof door 9b is opened only when the sawing material is carried out from the soundproof hood, and is closed otherwise.

If the trench 20 is not soundproofed, the noise generated when cutting the material leaks out of the soundproof hood via the trench 20. In order to prevent the leakage of this noise, the trench 2 in the soundproof hood is
A soundproof plate 21 in which a sound absorbing material is attached to an iron plate or an iron plate is attached to the upper part of 0.

Further, a crop discharge shoe 18 is provided so as to penetrate through the lower portion of the side wall of the soundproof hood 7, and the soundproof hood 7 is provided.
An opening for discharging the crop is provided in the penetrating portion of the door. As shown in FIG. 3, a soundproof door 19 that opens and closes this opening is provided. In the figure, a soundproof door is shown that rotates up and down to open and close the opening, but it may open and close in the vertical direction. The soundproof door 19 is opened only when the crop is discharged, and is closed otherwise.

By the way, if the surroundings of the hot sawing machine are covered with the soundproof hood as described above, it becomes impossible to confirm the stop position and the cutting state of the sawing material. Therefore, the monitoring camera 23 is attached to the ceiling portion of the soundproof hood 7 located above the cutting position 6, and the stop position and the cutting state of the sawing material are displayed on the monitor-television 24 provided in the cab 25 as an image. I have to.

[0034]

The device of the present invention is a soundproof door that covers the periphery of the hot sawing machine with a soundproof hood and opens and closes the opening through which the sawing material is carried in and out and the opening necessary for replacing the saw blade. Since the trench inside the soundproof hood that leaks noise is covered with a soundproof plate, it is possible to prevent noise that is harmful to the human body when the sawing material is cut out and leaks out of the soundproof hood. it can.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of the device of the present invention.

FIG. 2 is a plan view of the device of the present invention.

FIG. 3 is a right side view of the device of the present invention.

FIG. 4 is a cross-sectional view taken along the line AA of FIG.

FIG. 5 is a front view of the device of the present invention.

6 is a sectional view taken along line BB of FIG.

FIG. 7 is an explanatory view of a hot saw cutting machine.

FIG. 8 is a diagram showing a noise reduction distribution around a noise source covered with a tunnel type hood before and after installation of the hood.

[Explanation of symbols] 1 saw blade 2 motors (saw blade rotation drive) 2a Conducting means 4 Shaped steel (saw cutting material) 5 Transport roller 6 cutting position 7 Soundproof hood (hot saw cutting machine) 7a, 7b soundproof hood (conveyance table) 8a, 8b Opening (conveyance table) 11a, 11b Soundproof hood (saw blade) 12 Fluid cylinder- (saw blade) 13 Sample transfer device 14 Opening area (Sample transfer device) 15 Soundproof door (Sample transfer device) 16a, 16b Fluid cylinder (conveyance table) 17 Fluid Cylinder- (Sample Transfer Device) 18 Crop discharge shoe 19 Soundproof door (exhaust shoe) 20 trench 21 Soundproof Board (Trench) 22 crop back 23 Surveillance camera 24 Monitor-TV

Claims (5)

[Claims] 1. A sound-sheathing hood having a non-combustible sound-absorbing material attached to the inside of the hot-saw cutting machine and the range in which the saw blade reciprocates and the table for conveying the sawing material are surrounded by the sound-proofing hood. -Provide a soundproof door that opens and closes the opening where the sawing material is loaded and unloaded.
A soundproofing device for a hot sawing machine, in which the entire length of a trench provided under the conveying path for the sawing material in the soundproof hood is covered with a steel plate. 2. The soundproofing device for a hot saw cutter according to claim 1, wherein the soundproof hood is provided with an opening for replacing a saw blade, and the opening is provided with a soundproof door that can be opened and closed. 3. The soundproofing device for a hot sawing machine according to claim 1, wherein an opening and closing soundproof door is provided at an opening of the soundproof hood for taking out a sample piece of the sawing material. 4. A rotatable soundproof door that shields the cross section of the discharge shoe at the exit of the crop discharge shoe.
The soundproofing device for the hot saw cutting machine according to claim 1, wherein the soundproofing device is provided in a door. 5. A soundproof device for a hot saw cutting machine according to claim 1, wherein a camera for monitoring the sawing position is provided in the soundproof hood.