JP3574424B2 - Scraper device for chip discharge - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip discharging scraper device for scraping chips contained in a coolant with a scraper conveyor in a conveyor body into which a coolant such as a cutting oil used in a machine tool is charged as a dirty liquid.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, factories and the like have devised to reuse coolant such as cutting oil used for cooling a processing portion of a machine tool such as a cutting machine. That is, since the coolant discharged from the machine tool contains a mixed foreign matter (sludge) of various kinds of chips generated in the processing by the machine tool and becomes a dirty liquid, by removing the sludge from the dirty liquid, It is intended to regenerate the coolant and return the regenerated coolant to a machine tool or the like for reuse. Conventionally, various filtering devices have been used to remove sludge from a coolant.
[0003]
FIG. 5 shows an example of a conventional chip discharging scraper device for scraping off chips contained in a coolant by a scraper conveyor. The scraper device 30 for chip discharge (hereinafter abbreviated as “scraper device”) 30 is a conveyor body 2 including a storage section 31 into which a dirty liquid is introduced, and an inclined section 33 extending obliquely upward from the storage section 31 via a connection section 32. The flat bottom surface 34 of the storage portion 31 extends upward from the curved surface 35 of the connection portion 32 while being connected to the inclined surface 36 of the inclined portion 33. Coolant that is used in a machine tool such as a cutting machine and is mixed with sludge (foreign matter) of various sizes such as chips and turned into a dirty liquid is introduced into the storage unit 31 from an inlet (not shown). Relatively large sludge and heavy sludge precipitate at an early stage and deposit on the bottom surface 34 of the storage unit 31.
[0004]
The scraper device 30 is configured as a scraper conveyor for scraping off the chips CP accumulated on the bottom surface 34 of the storage unit 31. The scraper conveyor is composed of a pair of left and right chains 3, 3 (only one is shown in FIG. 5) arranged in parallel, and a number of scrapers 4 (only partially ). Each of the scrapers 4 has a rectangular plate shape, and both left and right ends are respectively connected to the left and right chains 3. The chains 3, 3 are stretched over a driving sprocket 6 provided at an upper portion of the inclined portion 35 and a driven sprocket 7 disposed at an end of the storage portion 31, and are also provided by a plurality of guide sprockets (not shown). Guided appropriately, the drive sprocket 6 is driven via the drive shaft 5 by the output of a drive motor (not shown).
[0005]
In this example, most of the inclined portion 33 is located above the liquid level L of the dirty liquid stored in the storage portion 31, and a chip discharge port 8 is formed at an upper portion of the inclined portion 33, and the chip discharge portion is formed. Below the outlet 8, a chip box 9 into which the dropped chips CP are introduced is provided. When driven by the driving sprocket 6, the scraper conveyor travels from the driven sprocket 7 along the bottom surface 34 of the storage portion 31, the curved surface 35 of the connecting portion 32, and the inclined surface 36 of the inclined portion 33 to reach the driving sprocket 6. It is circulated by a feed traveling portion 37 and a return traveling portion 38 that goes around the drive sprocket 6 and goes down the inclined portion 33 and returns from the connection portion 32 through the storage portion 31 to the driven sprocket 7. The scraper conveyor scrapes off the chips CP deposited on the bottom surface 34 by the scraper 4 traveling while sliding on the bottom surface 34 in the feed traveling unit 37, and further slides on the inclined surface 36 via the curved surface 35. By traveling, the chips CP are carried up along the inclined surface 36. The chip CP carried by the scraper 4 is dropped into a chip box 9 from a chip discharge port 8.
[0006]
In the scraper device 30 of the type in which the chips CP are carried by the scraper 4 as described above, the feed traveling portion 37 and the return traveling portion 38 have a structure in which the traveling directions are reversed and travel substantially parallel in order to make the structure compact. Has become. As a result, the scraper 4 that transports the chips CP in the feed traveling section 37 and the scraper 4 that is returning to the driven sprocket 7 pass by a relatively close interval.
[0007]
[Problems to be solved by the invention]
Since the scraper device has a structure in which the scraper of the feed travel unit and the scraper of the return travel unit pass each other at a short distance, the chips grown in a dumpling shape are separated from the bottom of the conveyor body by the scraper of the feed travel unit. When it is transported to the inclined surface of the inclined part through the curved surface of the inclined part, it is pushed back by contacting the scraper of the return traveling part or dropped downward, and some of the chips discharged from the chip discharge port The chips are only chips, and the chips that have not been discharged outside the machine stay and grow in the conveyor body. The chips that have accumulated and grown further cause biting, which causes the scraper device to stop or break. Therefore, when troubles caused by these chips occur, it is necessary to perform a return operation of stopping the apparatus and removing the chips in the scraper apparatus each time. In addition, the long chips carried by the scraper were not successfully dropped from the discharge port, causing a phenomenon of being wound around the drive shaft of the scraper device, and it was necessary to periodically remove the wound chips. .
[0008]
Therefore, a problem to be solved by the present invention is to provide a feed traveling unit that scrapes chips settled on the bottom surface of the conveyor body with a scraper and discharges the chips to the outside, in a conveyor body into which coolant containing chips is supplied as a dirty liquid. In a scraper device for discharging chips in which a scraper conveyor circulating with a return travel section running substantially parallel to the feed travel section is disposed, when the feed travel section and the return travel section pass vertically, This is to prevent the chips transported in the section from interfering with the scraper in the return traveling section.
[0009]
An object of the present invention is to prevent the scraper in the return travel unit from interfering with the chips being conveyed in the feed travel unit, so that the dumpling-shaped chips carried by the feed travel unit can be removed by the scraper in the return travel unit. An object of the present invention is to provide a chip discharging scraper device that can be successfully carried out to a chip discharging port without being dropped downward.
[0010]
[Means for Solving the Problems]
A chip discharging scraper device according to the present invention is a feed traveling unit that scrapes chips settled on the bottom surface of the conveyor body with a scraper and discharges the chips to the outside, in a conveyor body in which coolant mixed with chips is supplied as a dirty liquid, A scraper conveyor that circulates with a return travel unit that travels substantially parallel to the feed travel unit is arranged, and between the return travel unit and the feed travel unit of the scraper conveyor, chips that are conveyed by the feed travel unit are disposed. It is configured that a holding plate for holding is provided.
[0011]
According to the chip discharging scraper device, when the coolant is supplied to the conveyor body, the chips mixed in the coolant settle on the bottom surface of the conveyor body. A scraper conveyor disposed in the conveyor body scrapes the settled chips by a feed traveling unit and discharges the chips to the outside. The scraper conveyor travels past the feed travel section at its return travel section, but since a pressing plate is provided between the feed travel section and the return travel section of the scraper conveyor, the scraper conveyor is scraped off by the feed travel section and transported. Even when the chips are raised in a dumpling shape, they are not pressed by the pressing plate and do not interfere with the return traveling portion of the scraper conveyor. Accordingly, the chips scraped off by the feed traveling section are smoothly discharged to the outside of the scraper device. The dirty liquid containing chips is filtered by an appropriate filtration mechanism and can be regenerated as a clean liquid that can be reused as a coolant.
[0012]
In the scraper device for discharging chips, the conveyor body includes a storage portion for storing the dirty liquid, and an inclined portion connected to the storage portion and extending above the level of the dirty liquid, and an upper portion to which the chip discharge portion is connected. It is preferable that the pressing plate has a structure extending at least along the inclined portion. By arranging the partition plate at least corresponding to the inclined portion, even if the distance between the feed traveling portion and the return traveling portion that run past each other on the inclined portion is narrowed, the return traveling portion of the scraper conveyor is scraped by the feeding traveling portion. It does not interfere with the chips being transported.
[0013]
Further, in this chip discharging scraper device, the drive shaft for driving the scraper conveyor is disposed above the inclined portion of the conveyor body, and a cover member surrounding the drive shaft can be attached to the upper end of the pressing plate. The cover member functions as an anti-winding plate that prevents long chips from winding around the drive shaft, and prevents the drive shaft from being stopped by the wound chips.
[0014]
Further, in this chip discharging scraper device, a catch preventing bar for preventing the chips transported by the feed traveling section from being caught can be provided at the lower end of the holding plate. If the edge of the holding plate is kept in the cut state, the chips conveyed by the feed traveling unit are likely to be caught when coming into contact with the lower end having the sharp edge of the holding plate. At the lower end of the holding plate, for example, by providing an anti-catching bar made of a pipe or a rod having a smooth surface, chips transported by the feed traveling unit can be moved from the anti-catching bar to the lower end of the pressing plate. It moves smoothly in a state where it is squeezed below and held down, and is conveyed by the feed traveling unit in the pressed state.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of a chip discharging scraper device according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic view showing an embodiment of a chip discharging scraper device according to the present invention, FIG. 2 is a sectional view taken along line AA of the chip discharging scraper device shown in FIG. 1, and FIG. 3 is a chip discharging scraper shown in FIG. FIG. 4 is a perspective view of a holding plate used in the apparatus, and FIG. 4 is an explanatory diagram showing a cover member attached to the holding plate shown in FIG. 1 to 4, components having the same functions as those shown as a conventional chip discharging scraper device are denoted by the same reference numerals, and detailed description thereof will not be repeated.
[0016]
As shown in FIGS. 1 and 2, in a chip discharging scraper device (hereinafter abbreviated as “scraper device”) 1 according to the present invention, a scraper conveyor includes a storage section 31 into which coolant containing chips is introduced as a dirty liquid. Of the scraper conveyor, which travels along the bottom surface 34 of the scraper, scrapes off the chips CP settled on the bottom surface 34 and discharges the outside through the inclined portion 33, and the return traveling portion 38 of the scraper conveyor which has finished discharging the chip CP. The two running parts 37 and 38 can be inverted by the driving sprocket 6 and the driven sprocket 7, and can be infinitely circulated. Between the feed traveling section 37 and the return traveling section 38 of the scraper conveyor, the chips CP scraped by the scraper 4 of the traveling section 37 may interfere with the scraper 4 of the return traveling section 38 and be dropped into the storage section 31. A holding plate 10 for holding the chips CP is provided so as not to be present. In this embodiment, the presser plate 10 extends from the connection portion 32 of the scraper device 1 where the lower end portion 11 is located to the upper end portion 12 that extends directly below the drive shaft 5 along the inclined portion 33.
[0017]
As shown in FIGS. 2 and 3, the holding plate 10 is provided between the side walls 39, 39 formed integrally from the both side edges of the inclined surface 35. The holding plate 10 is attached to the side walls 39, 39 on both sides by the L-shaped bracket 13 at least at two places in the longitudinal direction along the inclined portion 33. That is, the L-shaped bracket 13 has a base portion 13a attached to the holding plate 10 by the attachment bolt 14, and an upright piece 13b attached to each side wall 39 by welding (see FIG. Reference numerals 13a and 13b are attached only to the L-shaped bracket 13 of the section).
[0018]
As shown in FIG. 3, the lower end portion 11 of the holding plate 10 is a guide that is bent stepwise at the bending line 15, and is caught at its tip end, that is, at the upstream end of the feed traveling portion 37. A prevention bar 16 is provided. The anti-trap bar 16 is formed from a material having a smooth and round surface such as a round bar or a pipe. Since the distance between the lower end portion 11 of the holding plate 10 and the feed traveling portion 37 is narrowed in the traveling direction of the feed traveling portion 37, the dumpling-shaped chips CP sent by the scraper 4 of the feed traveling portion 37 are: It is gradually held down by the lower end 11. Further, if the tip of the lower end portion 11 is in a state where the metal plate material is cut, the chip CP is easily caught on the cutting edge, but by providing the tip of the lower end portion 11 with the catch prevention bar 16, the chip CP Thus, the user can smoothly dive under the holding plate 10 without being caught.
[0019]
The chip CP is conveyed on the inclined surface 36 while being pushed by the scraper 4 of the feed traveling unit 37, and when the chip CP reaches the chip discharge port 8, the chip CP usually falls out of the machine from the chip discharge port 8 by its own weight. However, if no countermeasures are taken, the chips CP may be entangled with the chains 3 and 3 and wound around the drive shaft 5 disposed above the inclined portion 33 of the scraper device 1. In order to prevent the chips CP from winding around the drive shaft 5, a cover member 17 surrounding the drive shaft 5 is attached to the upper end 12 of the holding plate 10. The cover member 17 includes a first cover plate 18 including a substrate portion 20 attached to the upper end portion 12 of the holding plate 10, and a semi-enclosing portion 21 that is sequentially bent from the substrate portion 20 and covers a half around the drive shaft 5. A second cover plate 19 as a semi-enclosed portion 23 is attached to the distal end of the semi-enclosed portion 21 by a mounting screw 22 and the lip portion 24 comes into contact with the base end of the semi-enclosed portion 21 of the first cover plate 18. I have. Since the semi-enclosed portion 21 may come into contact with the chip CP, the semi-enclosed portion 21 has an outer surface that changes more smoothly than the semi-enclosed portion 23 as a whole. By covering the half-enclosing portion 23 on the half-enclosing portion 21 placed at a predetermined position with respect to the drive shaft 5, the periphery of the drive shaft 5 can be surrounded.
[0020]
The cover member 17 is adjustable with respect to the holding plate 10 by adjusting the mounting position of the cover plate 18 with respect to the upper end portion 12 of the first holding plate 10 by the adjusting structure 25. The adjusting structure 25 includes a long hole 26 formed in the base 20 of the first cover plate 18 in the longitudinal direction, and a fastening screw 27 such as a mounting screw 27 that is threaded into the upper end 12 of the holding plate 10 through the long hole 26. It is composed of tools. The cover member 17 can be adjusted with respect to the holding plate 10 by loosening the mounting screw 27 and sliding the cover member 17 with respect to the holding plate 10 to adjust the position, and then tightening the mounting screw 27 again. .
[0021]
In the above embodiment, when the coolant mixed with sludge from the machine tool or the like is put into the storage unit 31, the sludge precipitates quickly on the bottom surface 34 of the storage unit 31 to form settled sludge, that is, chips CP. The scraper conveyor scraps off the chips CP and discharges them to the outside at a feed traveling section 37 moving along the bottom surface 34 of the storage section 31. Although the scraper conveyor travels past the feed travel section 37 at the return travel section 38, the presser plate 10 for the chips CP is provided between the feed travel section 37 and the return travel section 38 of the scraper conveyor. Even if the chips CP scraped off by the feed traveling portion 37 are raised in a dumpling shape, the chips CP are pressed down by the holding plate 10 in front of the connecting portion 32, and are traveling on the return traveling portion 38. It passes through the inclined portion 33 smoothly without interfering with the scraper 4 and falls out of the machine from the chip discharge port 8. That is, the holding plate 10 functions as a chip holding member for holding the chip CP conveyed by the feed traveling portion 37 of the scraper conveyor and preventing the scrap CP from interfering with the scraper 4 of the return traveling portion 38. In addition, even if the chips CP rise so as to wind around the drive shaft 5 without falling, the cover member 17 attached to the upper end portion 12 of the holding plate 10 surrounds the drive shaft 5, so that the chips CP Winding around the drive shaft 5 is prevented.
[0022]
【The invention's effect】
The present invention is configured as described above, and has the following effects. That is, the chip discharging scraper device is a feed traveling unit that scrapes chips deposited on the bottom surface of the conveyor body with a scraper and discharges the chips to the outside in a conveyor body into which a coolant mixed with chips is supplied as a dirty liquid, A scraper conveyor that circulates with a return traveling unit that travels substantially parallel to the feed traveling unit is arranged, and a press that presses chips conveyed by the feed traveling unit between the return traveling unit and the feed traveling unit of the scraper conveyor. Since the plate is provided, when the return traveling part and the feed traveling part of the scraper conveyor pass each other, even if the scraped chips are in a dumpling shape, the scraps are pressed by the presser plate and the scraper conveyor returns. There is no interference with the running part. Therefore, the chips scraped off by the feed traveling section are smoothly discharged to the outside of the scraper device, so that the device does not stop or be damaged by the grown chips, and it is not necessary to perform a returning operation such as removing the chips.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an embodiment of a chip discharging scraper device according to the present invention.
FIG. 2 is a sectional view taken along the line AA of the scrap discharging device shown in FIG. 1;
FIG. 3 is a perspective view of a pressing plate used in the scrap discharging device shown in FIG. 1;
FIG. 4 is an explanatory view showing a cover member attached to the holding plate shown in FIG. 3;
FIG. 5 is a schematic view showing an example of a conventional chip discharging scraper device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Scraper device for chip discharge 2 Conveyor main body 4 Scraper 5 Drive shaft 8 Chip discharge unit 10 Holding plate 11 Lower end portion of holding plate 12 Upper end portion of holding plate 16 Latch prevention bar 17 Covering member 31 Storage unit 32 Connection unit 33 Inclined part 34 Bottom surface 37 Feed running section 38 Return running section L Dirty liquid level CP Chip

Claims (2)

A conveyer body having a storage portion into which the coolant mixed with the chips is supplied as a dirty liquid and a slope portion connected to the storage portion and extending above the level of the dirty liquid and having an inclined portion to which a chip discharge portion is connected, and A scraper conveyor that circulates through a feed traveling unit that scrapes chips settled on the bottom surface with a scraper and discharges it to the outside and a return traveling unit that travels substantially parallel to the feed traveling unit, and a return traveling unit and a traveling traveling of the scraper conveyor. A pressing plate disposed between the feeding unit and a pressing plate for pressing chips conveyed by the feed traveling unit; and a driving shaft for driving a scraper conveyor disposed above the inclined portion of the conveyor body.
The feed traveling unit provided at the lower end of the holding plate extending along the inclined portion of the conveyor body includes an anti-trap bar that prevents the chips transported from being caught, and the anti- trap bar is orthogonal to the traveling direction of the scraper conveyor. chip discharge scraper device that will be formed in the round bar or pipe having a smooth and rounded surface is arranged in the orientation. The scraper device according to claim 1, further comprising a cover member surrounding the drive shaft at an upper end of the holding plate.

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