JPH0115494Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cover device for a cutting machine such as a circular saw or a disc cutter, and more specifically to a cover device for a rotary tool such as a circular saw blade. This prevents the cutting oil and chips that are scattered when cutting the material from coming into contact with the cover and bouncing back, and further reducing the load when opening and closing the cover, making it easier to open and close. The present invention relates to a cover device that can be used as a cover device.

(Prior Art) Circular saws, disk cutters, and the like are used as cutting machines that continuously cut materials such as long bars into short products. In general, in a circular saw machine that is equipped with an automatic bar feeder and that continuously cuts materials one after another at high speed, a machining head that rotatably supports a circular saw blade as a rotary tool is mounted on the machine stand and swings vertically. Supported for free movement. Then, after the material supplied to the cutting position by the automatic bar supply device is clamped and fixed by the vise device, the material is cut by the circular saw blade.

(Problem that the invention aims to solve) When cutting a material with a conventional cutting machine such as a circular saw, cutting oil and chips are scattered around due to the rotation of the rotary tool, so for safety reasons, it is necessary to A cover is provided. However, in the past,
Since the cover covered only one part, the function of preventing the cutting oil and chips from scattering was insufficient, and there were also safety problems.

Therefore, in view of the above-mentioned problems, this invention was developed by
A cover is used to cover the entire machining head equipped with a rotary tool, but simply covering the entire head with a cover results in a new problem, as the cover becomes large and heavy, requiring effort to open and close the cover. Further, there is a problem in that the chips of the cutting oil that come into contact with the cover bounce back and scatter in random directions.

Therefore, the present invention attempts to solve new problems as described above.

(Means for solving the problem) In order to solve the above-mentioned problems, in the present invention, at least the front, left and right sides, and above of the processing head equipped with the rotary tool for cutting the material in the cutting machine are provided. A safety cover is provided to cover the material, and the lower part of the right and left sides of the safety cover is pivotally connected to the machine base of the cutting machine so that the safety cover can be opened and closed upwards, and the safety cover is provided with a safety cover that can be freely opened and closed in an upward direction, so that the material is not blown away when cutting the material by the rotary tool. In order to reduce the load when opening and closing the safety cover, a fin with an approximately V-shaped groove is provided on the inner surface of the safety cover where cutting oil and chips contact, and between the machine base and the safety cover, the load is reduced when the safety cover is opened and closed. This is achieved by interposing a gas spring device.

(Example) Referring to FIGS. 1 and 2, on the rear side (left side in FIG. 1) of the cutting machine 3 implementing the present invention,
A general automatic bar feeder 1 is installed. That is, the cutting machine 3, like a general disk cutter or circular saw, cuts long bars (raw materials) automatically fed by the automatic bar feeder 1 into short products. It has the effect of cutting continuously. In this cutting machine 3, a processing head portion equipped with a rotary tool 5 (see FIG. 4) such as a circular saw blade is covered by a safety cover 7, and the product is cut inside the safety cover 7. The product is discharged from the product outlet 9 (see FIG. 2) formed on the front surface of the safety cover 7, slides down the chute 11, and comes out to the left or right in FIG.

As can be understood from FIGS. 3 and 4, the safety cover 7 is provided at least in front of the machining head 21 rotatably equipped with the rotary tool 5, on both left and right sides (in FIG. 4, below, on both left and right sides). ) and each side plate covering the upper part (upper part in FIG. 3). As shown in FIG. 3 and FIG.
It is pivoted to. Therefore, the safety cover 7 can be opened and closed upward. More specifically, the second
As shown in FIG. 5, a support portion 43 is provided on the right side of the machine base 15, and the safety cover 7 is pivotally supported on this support portion 43 via the hinge member 13. It is something.

As shown in FIG. 3, the processing head 21 is provided on the machine base 15 so as to be able to swing vertically via a horizontally provided shaft 17, and the processing head 21 is not shown in the figure. A piston rod 19 that is raised and lowered by a drive source such as a hydraulic cylinder
It is driven by and oscillates. An electric motor 23 for rotating the rotary tool 5 is mounted on the machining head 21. Incidentally, in a cutting machine such as a circular saw, the structure for vertically swinging the machining head 21 equipped with a rotary tool 5 such as a circular saw blade is well known, so a more detailed explanation will be omitted.

Also, as shown in Figure 3, the piston rod 1
A window 27 in which a transparent plate 25 is fitted is formed on the front plate of the safety cover 7 at the position where the safety cover 7 moves up and down, and a window 27 in which a transparent plate 25 is fitted is formed at a position corresponding to the electric motor 23.
A wire mesh window 29 is provided for discharging the cooled air.

In addition, in the processing head 21, a protective cover 31 (see FIG. 4) is provided on the upper half of the rotary tool 5 to prevent broken tools from scattering.
A protective cover 33 is also provided on the transmission portion of the belt that connects the electric motor 23 and the rotary tool 5.

The vice device 35 shown in FIG. 4 clamps and fixes the material supplied from the automatic bar supply device 1 from above, and has a known configuration, so a detailed explanation of its configuration will be omitted. As can be seen from FIG. 3, the safety cover 7 facing the vice device 5 is provided with a portion of the lower edge located above and close to the vice device 35 behind the rotary tool 5. A vertical chip protection plate 37 having a generally inverted L shape is attached to the inner surface of the upper plate of the safety cover 7 . Furthermore, in the safety cover 7, a fin 39 having a substantially V-shaped groove is attached to the inner surface of the left side plate, which receives the most chips and the like, and which receives the cutting oil and chips scattered by the rotation of the rotary tool 5. There is.

Therefore, there is no risk of cutting oil or chips flying over the vise device 35 and flying backwards, and the fin 3
Since the fin 9 is provided with a V-shaped groove, the cutting oil and chips do not collide at right angles, reducing noise, and the cutting oil and chips that come into contact with the fin 39 and bounce back are removed from the V-shaped groove. The light converges in the direction of the bottom, and can be prevented from being scattered by the surroundings.

In order to reduce the load when opening and closing the safety cover 7 and to open and close it easily, this embodiment is provided with a gas spring device 41 as shown in FIGS. 5 and 6. As is well known, this gas spring device 41 is constructed by sealing oil and high-pressure gas in a tube cylinder, slidably fitting a piston, and protruding a piston rod integral with the piston from one end of the tube cylinder. The piston is provided with a small hole that communicates with both sides of the piston. Therefore, due to the pressure difference acting on both sides of the piston (the pressure receiving area is smaller on the piston rod side), the piston rod is biased in the direction of protrusion, and the piston rod is always protruded. in a state. Note that this type of gas spring device is used as a device for freely opening and closing the small hole of the piston, for example, as a device for adjusting the height of a chair, and is well known, so a detailed explanation thereof will be omitted. do.

The tip of the piston rod of the gas spring device 41 is connected to the machine base 1 as shown in FIGS. 2 and 5.
The lower end is attached to the support part 43, which is provided on the right side of the machine 5 and located below the electric motor 23 mounted on the processing head 21.

In FIG. 2, a chip receiving container 45 is indicated by a two-dot chain line under the overhanging portion of the support portion 43.

As shown in FIG. 5, a plurality of shaft supports 47 are provided on the upper surface of the right end of the support section 43, and the safety cover 7 is rotatable on the shaft supports 47 via the hinge member 13. It is attached to.

As is clear from FIG. 5, a bracket 49 made of lip shaped steel is provided at the inner lower part of the right side plate of the safety cover 7, and an arm member 51 is attached to the left end of the bracket 49.
The upper end of the tube cylinder 55 is swingably attached. In addition, the above bracket 49
As shown in FIG. 3, is located below the electric motor 23 shown in FIGS. 3 and 4, and does not interfere with the electric motor 23.

At the lower left of the support part 43, there is a rotation shaft 5 that penetrates horizontally.
7, an arm 59 is fixed by suitable means, and a lever 61 is fixed to a pivot shaft 57 on the front side of the support portion 43 in FIG.

Also, as is clear from FIG. 6, on the back of the front plate of the support section 43, there is an upper stopper 63 and a lower stopper 65 (fifth stopper) that restrict the rotation range of the arm 59.
The lower end of the piston rod of the gas spring device 41 is swingably mounted near the free end of the arm 59 via a shaft pin 67.

A dog bolt 71 that presses the micro switch 69 when the safety cover 7 is closed is provided at the left end of the bracket 49 in FIG. be.

In FIG. 2, a handle 75 is provided on the left side plate and front side plate of the safety cover 7, and a locking device (not shown) for closing the safety cover 7 is also provided.

To open and close the safety cover 7 described above, operate as follows.

As shown in FIG. 5, the safety cover 7 is locked with the gas spring device 41 compressed through the bracket 49, the arm member 51, and the shaft pin 53. It expands at a high speed and reaches the maximum expansion state at the center position shown by the two-dot chain line in FIG. Safety cover 7 in this case
In the embodiment, the opening angle is about 45 degrees.

The opening movement of the safety cover 7 is automatically and gently performed by the pressure difference acting on both sides of the piston in the tube cylinder 55 in the gas spring device 41, and the micro switch 69 is activated at the same time as the opening movement. The rotary tool 5 is safe because it stops.

Next, to close the safety cover 7, the handle 75 is manually lowered and the piston rod is pushed into the tube cylinder 55 of the gas spring device 41, compressing and gently. Once it is closed, it is locked, so the cover can be opened and closed. is easy and poses no danger to workers.

If it is necessary to open the safety cover 7 beyond 90 degrees as shown by the two-dot chain line on the right side of FIG.
is brought into contact with the upper stopper 63.

In this case, the maximum extension position of the gas spring device 41 shifts upward as shown in FIG.
It can be opened gently up to an angle of over 90 degrees.

Although not shown, there is a device that locks the arm 59 in contact with the upper stopper 63.

The safety cover can be closed after opening more than 90 degrees by unlocking the upper stopper 63 of the arm 59 and manually pressing down on the handle 75 in the same way as when opening at 45 degrees. Can be closed.

(Effects of the invention) As can be understood from the explanation of the embodiments described above, in the present invention, the safety cover covers at least the front, both left and right sides, and the upper part of the processing head of the cutting machine. Safety is improved. In addition, on the inner surface of the safety cover, there are fins with approximately V-shaped grooves in the area that receives cutting oil and chips when cutting materials, so chips and other debris are thrown away from the safety cover. There is no abutment in directions orthogonal to each other, and noise caused by abutment can be reduced. Furthermore, in the V-shaped groove, the cutting oil and chips bounce back toward the bottom of the groove and are converged, thereby preventing scattering due to the bounce. Furthermore, since the safety cover is opened and closed with the assistance of a gas spring device, it can be opened and closed easily considering its size.

Note that the present invention is not limited to the above-mentioned embodiments, but can be modified by making appropriate changes.
Other embodiments may also be implemented.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the positional relationship between a cutting machine embodying the present invention and an automatic bar supply device. Second
The figure is a front view of the same cutting machine. FIG. 3 is a front sectional view of the safety cover of the embodiment device. FIG. 4 is a plan view showing the inside of the safety cover in section. FIG. 5 is an enlarged sectional view of the V section in FIG. 2. FIG. 6 is a plan view of FIG. 5. 5... Rotating tool, 21... Machining head, 7...
Safety cover, 15...Machine base, 39...Fin, 4
1...Gas spring device.

Claims (1)

[Scope of utility model registration request] A safety cover 7 is provided to cover at least the front, left and right sides, and upper part of a processing head 21 equipped with a rotary tool 5 for cutting a material in a cutting machine,
The lower part of the right and left sides of the safety cover 7 is pivotally connected to the machine stand 15 of the cutting machine so that the safety cover 7 can be opened and closed upwards, and the cutting oil that is scattered when the rotary tool 5 cuts the material can be removed. A fin 39 having a substantially V-shaped groove is provided on the inner surface of the safety cover 7 against which chips come into contact, and the machine base 5 and the safety cover 7 are
A cover device for a cutting machine, characterized in that a gas spring device 41 is interposed between the safety cover 7 and the safety cover 7 to reduce the load when opening and closing the safety cover 7.