JPS6234508B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field This invention relates to a chip conveyor for conveying chips such as cutting waste or press punching waste discharged from various machine tools in horizontal and inclined directions by means of a conveyor belt. It is something.

Prior Art Usually, chips discharged from a machine tool are dropped onto the conveyor belt of this type of conveyor together with coolant, and relatively large linear or block chips are not washed away by the coolant and are conveyed. They are sequentially conveyed as the belt rotates. However, fine powdery chips from castings, etc., flow out along with the coolant through the gap between the conveyor frame and the conveyor belt, and remain on the bottom of the conveyor frame or accumulate in the coolant tank. . Therefore, with conventional conveyors of this type, not only the efficiency of conveying powdered chips decreases, but also the remaining chips impede the rotation of the conveyor belt, and it takes time to clean the inside of the coolant tank. There was a problem.

Purpose This invention was made to solve the above-mentioned conventional problems, and its purpose is to reduce the amount of washed away chips, avoid mechanical troubles, and facilitate maintenance of the coolant tank. Another object of the present invention is to provide a novel chip conveyor that can efficiently remove powdered chips.

Embodiment Hereinafter, an embodiment embodying the present invention will be described based on the drawings.

As shown in FIG. 1, a machine frame 1 of this chip conveyor has a horizontal conveying path 2 extending horizontally
and an inclined conveyance path 3 rising diagonally upward. An endless conveyor belt 4 is installed in both conveyance paths 2 and 3 so as to be able to go around, and by driving a gear motor 5 installed on the upper end surface of the inclined conveyance path 3, the upper surface of the conveyor belt 4 is moved to the horizontal conveyance path. 2 side to the inclined conveyance path 3 side.

The conveyor belt 4 is composed of a large number of steel hinge plates 6 that are rotatably connected to each other, and a scraper plate 7 extending along the width direction of the conveyor belt 4 is provided on the upper surface of each predetermined number of hinge plates 6. It is welded and fixed in an upright position. As shown in FIG. 2, when the conveyor belt 4 rotates, the inclined conveyor path 3
In particular, relatively large chips C1 in the form of lines and blocks are conveyed upward by the front surface of each scraper plate 7.

The plurality of hinge plates 6 arranged at predetermined positions are molded from stainless steel, and as shown in FIGS. 3 and 4, a protection box 8 extending along the width direction of the conveyor belt 4 is fixed to the back surface thereof. ing. A support shaft 9 is rotatably supported between the left and right side plates 8a of the protection box 8 so as to extend parallel to the conveyor belt 4, and a rod-shaped permanent magnet 10 extending over almost the entire length of the support shaft 9 is rotatably supported. Fixed. This permanent magnet 10 is eccentric to the spindle 9 so that one pole (in this example, the north pole) is longer from the axis of the spindle 9 than the other pole (south pole). As the support shaft 9 rotates, the north pole faces the hinge plate 6 in a very close manner, and the south pole faces the hinge plate 6 at a predetermined distance. When the N pole faces the hinge plate 6 during chip transport, the permanent magnet 1 is placed as shown in FIG.
Particularly powdery chips C2 are attracted to the upper surface of the conveyor belt 4 by the magnetic force of 0.

Furthermore, a magnetic field line focusing member 11 made of a magnetic material and having a U-shaped cross section is fitted and fixed to the S pole of the permanent magnet 10, and as shown by the broken line in FIGS.
The lines of magnetic force M emerging from the poles are focused by the line of magnetic force focusing member 11, so that the magnetic force on the south pole side becomes weaker. Therefore, as shown in FIG. 6, when the S pole faces the hinge plate 6 when releasing the chip, the chip C2 on the hinge plate 6
is not magnetized and falls due to its own weight as the conveyor belt 4 reverses (see FIG. 2).

On the other hand, as shown in FIGS. 3 and 4, drive cams 12 having three protrusions 12a around the periphery are fixed to both ends of the support shaft 9, and the conveyor belt 4
As the belt rotates, it is rotated by 120 degrees by a plurality of engaging protrusions 13a to 13c provided on the side of the conveyor frame 1. In addition, each engagement protrusion 13
As shown in FIGS. 2 and 3, among the plurality of reinforcing beams 14 fixed to the conveyor machine frame 1 at predetermined intervals, reinforcing beams 14a and 14b in the upper and central portions are provided at both ends, respectively. The upper reinforcing beam 14a has first and second engagement protrusions 13a, 1 that protrude upward and downward, respectively.
3b, and a third engagement protrusion 13c that protrudes downward is provided on the central reinforcing beam 14b, respectively.

As shown in FIG. 4, a substantially triangular position holding cam 15 is fixed on the support shaft 9 in one end of the protection box 8, and each cam surface 15a is connected to a leaf spring 16 provided on the bottom plate of the protection box 8. By joining with the upper surface, the permanent magnets 10 are held at their respective rotational positions.

Next, the operation of the chip conveyor in this embodiment constructed as described above will be explained.

Chips discharged into the horizontal conveyance path 2 together with coolant from various machine tools are transferred to the inclined conveyance path 3 as the conveyor belt 4 rotates, as shown in FIG. At this time, each permanent magnet 10
Since the N pole faces the hinge plate 6,
The powder chips C2 can be adsorbed and held on the upper surface of each hinge plate 6, and unlike the conventional art, the powder chips are prevented from flowing out due to the coolant. Then, inside the inclined conveyance path 3, the powder chips C2 remain attracted to the permanent magnet 10, and the linear and lump chips C1 are moved upward one after another while being pressed by the front surface of each scraper plate 7. transported.

When the permanent magnet 10 reaches the upper horizontal part of the conveyor, the protrusion 12a of the drive cam 12 engages with the first engagement protrusion 13a provided on the upper reinforcing beam 14a, as shown by the arrow in FIG. The drive cam 12
It is rotated by 120 degrees and its north pole is separated from the hinge plate 6. Therefore, as shown in FIG. 6, the lines of magnetic force M of the permanent magnet 10 no longer act on the hinge plate 6, so that the adsorbed state of the powder chips C2 is released. Therefore, when the conveyor belt 4 is reversed in this state, the powder chips C2 and the linear and lumpy chips C1 separate from the hinge plate 6 and the scraper plate 7 due to their own weight and fall into the collection box 17.
In this case, in this embodiment, each permanent magnet 10
is provided eccentrically with respect to the support shaft 9, and the magnetic field line focusing member 11 is attached to its S pole, so that when the N pole is separated from the hinge plate 6, the demagnetization effect can be improved, and chip ejection is prevented. There is no possibility that the powder chips C2 remain on the hinge plate 6 at times.

When the permanent magnet 10 that has discharged the chips begins to descend within the inclined conveyance path 3 as the conveyor belt 4 rotates, it is rotated by 120 degrees by the second engaging protrusion 13b of the upper reinforcing beam 14a. , when passing through the lower end of the inclined conveyance path 3, the third engagement protrusion 13c of the central reinforcing beam 14b
The N-pole is rotated by .degree., and the N-pole is returned to the state where it can be attracted to the hinge plate 6. Then, in this state, it moves to the lower position of the horizontal conveyance path 2 and moves toward the base point while adsorbing and collecting the lost chips remaining on the bottom surface of the conveyor frame 1, thereby completing one cycle of chip conveyance and discharge work.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiment, and can be embodied in each of the modified examples described in the next section.

(1) As shown in FIG. 7, a magnetic roller 19 is rotatably provided below the upper end of the inclined conveyance path 3, and a scraper 20 is installed so that the tip contacts the outer peripheral surface of the magnetic roller 19. To support the chips and to forcibly adsorb and remove chips remaining on the hinge plate 6 and scraper plate 7 after the chips are released.

2. The permanent magnet 10 is constructed by connecting a plurality of small piece-shaped magnets in series instead of the bar-shaped magnet in the above embodiment.

(3) The permanent magnet 10 should be configured to rotate in reverse at an angle of 180°.

(4) The magnetic field line focusing member 11 of the above embodiment is omitted, and the eccentricity of the permanent magnet 10 is increased so that one pole is sufficiently separated from the hinge plate 6 when chips are ejected.

(5) The NS pole of the permanent magnet 10 is configured in the opposite manner to that of the above embodiment, and the magnetic force line focusing member 11 is attached to the N pole side.

(6) The drive cam 12 and the engaging protrusion 13 constituting the drive means are each provided only on one side of the conveyor belt 4.

(7) Position holding cam 15 and leaf spring 16 of the above embodiment
and are provided on both sides of the conveyor belt 4, respectively.

Effects As detailed above, the present invention provides a magnet for attracting chips along the width direction of the conveyor belt, and separates the magnet from the chip attracting surface of the conveyor belt at the chip release position of the conveyor belt. By installing the drive means, it is possible to reduce the amount of lost chips, avoid mechanical troubles, and facilitate the maintenance of the coolant tank. This invention has the effect of improving chip removal efficiency, and is therefore an industrially excellent invention as a chip conveyor.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention, in which FIG. 1 is a perspective view showing the entire chip conveyor, FIG. 2 is a side view showing its conveying action, and FIG. 3 is a side view showing the conveyor. is a sectional view taken along the line A-A in Fig. 2, Fig. 4 is a partially cutaway perspective view showing an enlarged main part, and Figs. 5 and 6 are sectional views of the permanent magnet in different operating states. . FIG. 7 is a side view of essential parts showing a modified example of the present invention. Conveyor frame...1, Conveyor belt...4, Magnet...10, Drive cam...12, Engagement protrusion as an engagement part...13a, Chip...C.

Claims (1)

[Scope of Claims] 1. In a chip conveyor that conveys chips C such as cutting waste or press punching waste horizontally or in an inclined direction by the circumferential movement of a conveyor belt 4, there is provided a conveyor belt on the back side of the conveyor belt 4 in its width direction. A magnet 10 for attracting chips is provided so as to be rotatable along the same direction, and can be rotated integrally with the magnet 10 in order to separate the magnet 10 from the chip attracting surface of the conveyor belt 4 at the chip release position of the conveyor belt 4. The conveyor frame 1 at the chip release position is provided with an engaging portion 13a that engages with the drive cam 12 and rotates the magnet 10 as the conveyor belt 4 moves. A chip conveyor featuring: