JP3345693B2 - Chip conveyor for machine tools - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip conveyor for carrying out chips generated by cutting by a machine tool from the machine tool.

[0002]

2. Description of the Related Art For example, in an NC lathe as shown in FIG. 9, a cutting fluid tank 4 is provided below a machining section 3 including a headstock 1 and a tool rest 2, and a chip conveyor 5 is provided in the tank 4. Is equipped. Conventionally, as shown in FIG. 10, a chip conveyor 5 has a horizontal section 6a and an inclined section 6b, and an endless belt 7 for conveying chips is provided with a motor 8 inside the conveyor frame.
The endless belt 7 has a large number of scrapers 9 projecting therefrom. The chips generated in the processing section 3 are transferred via the chute 10 to the horizontal section 6a.
And the inclined portion 6b
Is lifted up by the scraper 9 and carried out of the machine of the NC lathe.
To be released.

[0003]

By the way, the chips generated in the processing portion 3 are usually divided into short strips by a chip breaker of a cutting tool or the like. However, depending on factors such as the material and shape of the work, cutting conditions and the like. May be discharged in a continuous shape without breaking the chips,
Some reach 2m. As shown in FIG. 10, this type of continuous chip C is in a coil shape and is easily caught by a thin portion (for example, a cover made of sheet metal) of the conveyor frame 6 or a groove or a projection. Tends to remain in the inclined portion 6b. Since the free end side of the remaining continuous chips C slides on the endless belt 7, other chips are caught in that portion and a lump of chips is gradually formed, thereby causing trouble in the drive system and the guide system of the endless belt 7. And the transfer capability of the chip conveyor 5 is significantly reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a chip conveyor for a machine tool capable of releasing a long continuous chip from being caught, preventing troubles caused by the clogging of the chip, and improving the transfer capability.

[0005]

In order to solve the above-mentioned problems, the present invention comprises an endless belt for transporting chips inside a conveyor frame having a horizontal portion and an inclined portion so as to be capable of rotating. In a chip conveyor for machine tools, a pressing member for pressing a chip against an endless belt on an inclined portion is moved in a direction approaching and away from the belt .
A means for movably providing the pressing member in the approaching direction is provided.
With configured.

[0006]

According to the above arrangement, the continuous chip hooked on a part of the conveyor frame has its free end pressed against the endless belt by the pressing member and is sandwiched between the pressing member and the endless belt. Then, in this state, the continuous chips are pulled in the transport direction along with the rotation of the endless belt, and the chips are forcibly released. At this time, since the pressing member moves in the circumferential direction of the endless belt, there is no possibility that an excessive force acts on the pressing member and the endless belt by the sandwiched chip. Therefore, the endless belt always circulates smoothly,
The conveying capacity of the chip conveyor can be improved.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plurality of embodiments embodying the present invention will be described with reference to the drawings. <First Embodiment> FIGS. 1 to 3 show a first embodiment of the present invention. This chip conveyor 5 is provided with a pressing member 13 on an inclined portion 6b of a conveyor frame 6, whereby a continuous chip C is formed. It is configured to press against the endless belt 7. The pressing member 13 includes a plurality of movable scrapers 1.
4 and each scraper 14 has a pair of left and right arms 15.
And a holding plate 16 having a length substantially equal to the width of the endless belt 7 and a width capable of engaging with the scraper 9.

A support angle 19 is fixed inside both corners of the upper cover 18 in the inclined portion 6b.
The arm 15 is rotatably supported by a shaft 20. A stopper 21 protrudes from the upper end of the arm 15, whereby the arm 15 is restricted to a position perpendicular to the upper cover 18, and the movable scraper 14 is rotatable in the revolving direction of the endless belt 7 from the perpendicular position. It is configured. Further, the movable scraper 14 is urged toward a right angle position by a winding spring 22, and the spring 22 is inserted into the shaft 20 inside the support angle 19 where the chip does not enter.

In the chip conveyor 5 of the first embodiment constructed as described above, the continuous chips C hooked on a part of the conveyor frame 6 have their free ends on the endless belt 7 side by the holding plate 16 of the movable scraper 14. And is sandwiched between the holding plate 16 and the scraper 9. Then, in this state, the continuous chips C are pulled in the transport direction along with the rotation of the endless belt 7, and the catch of the chips C is forcibly released. At this time, since the movable scraper 14 rotates in the circumferential direction of the endless belt 7, there is no possibility that an excessive force acts on the movable scraper 14 and the endless belt 7 by the sandwiched chip C.

Therefore, troubles caused by chip clogging can be solved, and the endless belt 7 can always be smoothly circulated, so that the conveyance capacity of the chip conveyor 5 can be greatly improved.
When there is no continuous chip C, the movable scraper 1
Numeral 4 is held at a right angle position by the urging force of the winding spring 22, and in this state, cooperates with the scraper 9 to carry out fine powdery particles such as castings without dropping on the inclined portion 6b upward. Therefore, according to the pressing member 13 of the first embodiment, there is an effect that the movable scraper 14 can release the continuous chip C from being caught and can efficiently transport the fine chip.

<Second Embodiment> FIG. 4 shows a second embodiment of the present invention. In the chip conveyor 5, a roller 24 is used as the pressing member 13. The roller 24 extends in the width direction of the endless belt 7, is vertically movable in a long hole 26 of the upper cover 18 by a shaft 25, and
Following the endless belt 7, it is supported so as to be rotatable in its circumferential direction.

According to the chip conveyor 5 of the second embodiment, the free end side of the continuous chips C is pressed against the endless belt 7 by the roller 24, and is sandwiched between the roller 24 and the scraper 9, so that the endless belt 7 With the rotation, the continuous chips C are pulled in the transport direction, and the catch is forcibly released. Since the roller 24 can move up and down and rotate, there is no possibility that an excessive force acts even when the continuous chip C is sandwiched. Therefore, the endless belt 7 can always be smoothly circulated with a simpler configuration as compared with the first embodiment, and the conveyance capacity of the chip conveyor 5 can be greatly improved. Note that the roller 24 is moved to the inclined portion 6b.
And the rollers 24 may be positively rotated by a motor.

<Third Embodiment> FIG. 5 shows a third embodiment of the present invention. In this chip conveyor 5, a belt 28 is used as the pressing member 13. The belt 28 is wound around a pair of pulleys 29, and is positively rotated by the motor 30 in the circumferential direction of the endless belt 7. A weight rod 32 for urging the belt 28 toward the endless belt 7 is vertically movably supported in the elongated hole 31 of the upper cover 18 in the middle of the belt 28. According to this configuration, the belt 28 is biased by the urging force of the weight rod 32.
Presses the continuous chips C against the endless belt 7 and sandwiches them over a wide area, so that a specific effect that the continuous chips C can be reliably released from being caught can be expected.

Fourth Embodiment FIG. 6 shows a fourth embodiment of the present invention.
Is provided in the vicinity of. The pressing member 13 includes a pressing plate 35 extending in the width direction of the endless belt 7, the upper end thereof is rotatably supported by a top cover 37 by a shaft 36, and the weight 38 is attached to the lower end.

According to the chip conveyor 5 of the fourth embodiment, the pressing plate 35 is moved by the urging force of the weight 38 so that the continuous chips C
Of the continuous chips C in the vicinity of the chip discharge port 34 can be reliably released. Further, when the continuous chip C is sandwiched, the pressing plate 35 rotates with the rotation of the endless belt 7, so that there is no possibility that an excessive force acts on the pressing plate 35 and the endless belt 7. Therefore, the endless belt 7 can be smoothly circulated at all times with a relatively simple configuration, so that the conveyance capacity of the chip conveyor 5 can be greatly improved.

<Fifth Embodiment> FIG. 7 shows a fifth embodiment of the present invention. Also in this chip conveyor 5, the pressing member 13 has a pressing plate 35, and the pressing plate 35
At 0, it is urged toward the endless belt 7 side. Therefore,
As in the fourth embodiment, there is an advantage that the continuous chip C can be reliably released from the vicinity of the vicinity of the chip discharge port 34 with a relatively simple configuration.

<Sixth Embodiment> FIG. 8 shows a sixth embodiment of the present invention. In this chip conveyor 5, a pressing roller 42 is used as a pressing member 13, and a plurality of rollers 42 are provided on the peripheral surface. And a shaft 43
At the top cover 37 so as to be able to move obliquely up and down.
It is configured to be pressed against. Further, the pressing roller 42 is positively rotated by the motor 8 common to the endless belt 7 at a slightly higher speed in the revolving direction of the endless belt 7 through a power transmission mechanism 46 including a gear, a sprocket wheel, and a chain.

According to the chip conveyor 5 of the sixth embodiment, the caught continuous chips C have their free ends pressed against the endless belt 7 by the pressing rollers 42 near the chip discharge ports 34, and The chip C is sandwiched between the protrusion 43 and the scraper 9 of the endless belt 7, and is pulled in the transport direction with the positive rotation of the pressing roller 42 slightly faster than the endless belt 7, and the catch of the chip C is forcibly released. Therefore, as compared with the fourth and fifth embodiments, there is an advantage that the catch can be more reliably released and the clogging of the chip can be eliminated promptly.

In addition, the present invention is not limited to the above embodiments, but may be embodied by appropriately changing the shape and configuration of each part without departing from the spirit of the present invention.

[0020]

As described above in detail, according to the present invention, since the pressing member for pressing the chips against the endless belt is provided on the inclined portion of the conveyor frame, the continuous chips are released from being caught and the chips are clogged. An excellent effect of preventing the accompanying trouble and improving the carrying capacity is achieved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a chip conveyor showing a first embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG. 1 showing a pressing member.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a schematic view of a chip conveyor showing a second embodiment of the present invention.

FIG. 5 is a schematic view of a chip conveyor showing a third embodiment of the present invention.

FIG. 6 is a schematic diagram of a chip conveyor showing a fourth embodiment of the present invention.

FIG. 7 is a schematic view of a chip conveyor showing a fifth embodiment of the present invention.

FIG. 8 is a schematic view of a chip conveyor showing a sixth embodiment of the present invention.

FIG. 9 is a front view of an NC lathe showing an example of installation of a chip conveyor.

FIG. 10 is a schematic view showing a conventional chip conveyor.

[Explanation of symbols]

5. Chip conveyor, 6. Conveyor frame, 6a
..Horizontal part, 6b, inclined part, 7, endless belt, 13, pressing member, 14, movable scraper, 24
..Rollers, 28.Belts, 36.Pressing plates, 42.
・ Pressing roller, C ... continuous chip.

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-32546 (JP, A) JP-A-3-76820 (JP, U) JP-A-54-92573 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B65G 19/00-19/30 B23Q 11/00

Claims (1)

(57) [Claims] 1. A chip conveyor for machine tools comprising a conveyor frame provided with a horizontal portion and an inclined portion and having an endless belt for conveying the chips stretched around the endless belt so as to press the chips against the endless belt against the inclined portion. The direction in which the pressing member approaches and separates from the belt
Means movably provided to bias the pressing member in the approaching direction
Machine tools for chip conveyor which is equipped with a.