JP4198330B2 - Cleaning machine oil purifier - Google Patents

Description

【００１９】
したがって、前記ステーＳに形成された各凹部２８〜３１とスリット３２と間隔は前述したように７ｍｍに設定され、各凹部２８〜３１の深さとスリット３２の上縁の位置は、マグネット２７及び堰部材２６をステーＳにセットし支持台２３を介して浄油部２２に装着した状態で、堰部材２６を溢流する洗浄済油の油面からマグネット２７の上縁までの距離が７ｍｍとなるように設定されている。
また、上記支持台２３の面から各堰部材２６の上縁までの高さは、第１の堰部材２６から順に４５ｍｍ、３５ｍｍ、３５ｍｍ、２５ｍｍとなり、油面に２つの落差が生ずるようになっている。尚、少なくとも１つの落差があればよい。
【００２０】
このように、ステーＳの各凹部２８〜３１にマグネット２７をセットし、かつ、堰部材２６を各スリット３２に取り付けて構成された浄油ユニット１３を支持台２３上にセットし（図４の状態）、図３に示すようにこの支持台２３をケース本体１２の浄油部２２にセットすればよい。
その結果、支持台２３を介して浄油ユニット１３がケース本体１２にセットされると、前記浄油部２２を横断するように設けられたマグネット２７が洗浄済油の流過方向に４つ配置されると共に、各マグネット２７の下流側の近傍に堰部材２６が配置されることとなる。
【００２１】
つまり、図１、図２に示すように、前記各マグネット２７は堰部材２６に対して、堰部材２６の上流側の面上で少なくとも磁束密度が３００Ｇ（１３００Ｇのマグネットの場合）確保できる磁着可能距離Ｌ（＝７ｍｍ）隔てて配置され、更に、前記堰部材２６の上縁を溢流する洗浄済油の油面上で少なくとも磁束密度が３００Ｇ確保できる磁着可能深さＤ（＝７ｍｍ）の位置に配置されることとなる。
【００２２】
尚、この実施形態の浄油装置１１は、切粉を除去する部分のみの説明をしているが、繊維などのゴミを除去するための図示しないフィルターがＯＵＴ側配管１９の下流側に取り付けられている。このフィルターは、切粉によって目詰まりを起こさないような濾過精度が低いフィルターである。
【００２３】
次に、作用について説明する。
図示しない洗浄機から送られた洗浄済油がケース本体１２のＩＮ側配管１４から戻り部１５に入り、戻り部１５を満たすと、次に、最初のマグネット２７の上側と下流側に回り込んで１番目の堰部材２６に至る。このとき、前記磁着可能距離Ｌ及び磁着可能深さＤが確保されているため、マグネット２７により作用している磁力は、油面及び堰部材２６の上流側の面上で３００Ｇとなる。よって、洗浄済油に含まれている切粉の大部分はこのマグネット２７に磁着される。
【００２４】
つまり、全ての洗浄済油は前記磁着可能距離Ｌ及び磁着可能深さＤで定められた狭い流通路を通過するため、この流通路において効率よくマグネット２７に磁着されるのである。
尚、この流通路を通過する際には、洗浄済油の流速と粘性によって上記マグネット２７により磁着されない切粉が残ってしまう可能性があるため、その下流側に複数のマグネット２７を使用しているのである。
【００２５】
次に、１番目の堰部材２６から溢れるようにして流れる洗浄済油は、この堰部材２６を乗り越えた後、堰部材２６直後の下流側で乱流を形成するため、磁着しきれなかった切粉は浄油部の底面、正確には支持台２３の面に溜まることなく撹拌される。したがって、切粉が下側に溜まることはなく下流側に流れる。とりわけ、１番目の堰部材２６に対して２番目の堰部材２６の高さが低くなっているため油面に落差が形成され、乱流を大きく形成できる要因となっている。
【００２６】
そして、同様にして、２番目、３番目、４番目のマグネット２７により切粉が磁着される。特に、４番目のマグネット２７には磁束密度が８０００Ｇのマグネットを使用しているため、この部分でより強力に切粉を磁着できる。また、３番目の堰部材２６に対して４番目の堰部材２６の高さが更に低くなっているため、ここにおいても油面に落差が形成され乱流を大きく形成でき、切粉が下面に溜まるのを確実に防止している。
【００２７】
このようにして、各マグネット２７により確実に切粉が磁着されるため、ケース本体１２の送り部２０には、切粉が除去された洗浄油が満たされる。そしてＯＵＴ側配管１９から、図示しないフィルターに送られて繊維状のゴミを除去された洗浄油は洗浄機に送られ、ブランキングされた鋼板材の洗浄に再使用される。
【００２８】
ここで、メインテナンスの際には、浄油ユニット１３が固定タイプである場合には、マグネット２７を取り外し、ウエス等で切粉である鉄粉を拭き取るだけで簡単に作業が行え、また、このとき装置を停止させる必要がない。また、浄油ユニット１３が着脱タイプである場合には、前記支持台２３ごと、あるいは浄油ユニット１３のみを取り外し、各マグネット２７に磁着した切粉を除去し、あるいは別途用意してある新しい浄油ユニット１３と取り替えれば、極めて短時間でメインテナンスを行うことができる。よって、使用済みのフィルターを廃棄しなければならない従来に比較して、再使用できる浄油ユニット１３を使用しているためランニングコストが低減できる。
【００２９】
したがって、この実施形態によれば、プレス鋼板を洗浄した洗浄済油が浄油部２２を下流側に向かって流れる際に堰部材２６を乗り越えると堰部材２６の下流側で撹拌されて乱流が発生するため、含有する切粉は沈殿することなく撹拌されて下流側のマグネット２７により磁着される。したがって、浄油部２２を流れる間に切粉を確実にマグネット２７に磁着させることができる。
また、マグネット２７の上方を流れる洗浄済油と、マグネット２７と堰部材２６との間を流れる洗浄済油に含まれる切粉は、切粉を磁着できるマグネット２７の磁束密度３００Ｇの範囲内で確実にマグネット２７に磁着されるため、各マグネット２７、堰部材２６を通過しながら洗浄済油に含有する切粉を確実に磁着できる。
【００３０】
したがって、従来のように切粉をフィルターで捕集する場合に比較して、短時間で切粉を除去できる。また、再利用するためにはマグネット２７に付着した切粉を除去すればよいだけなのでメインテナンスも行い易く、フィルターのように使用済みのものを廃棄して新品のものと交換する必要がないためランニングコストも低減できる。
【００３１】
尚、この発明は上記実施形態に限られるものではなく、例えば、磁束密度が確保できれば配置されるマグネット２７の磁界の強さ、個数は上記実施形態のものに限られない。また、実施形態で説明した磁着可能距離Ｌ、磁着可能深さＤは１３００Ｇのマグネットを使用した場合に７ｍｍであることがベストモードであるが、表１の実験結果でもわかるように、ある一定の幅、例えば、９５％付着できる１５ｍｍまでの範囲として幅を持たせ、マグネットの配置個数を増やしてもよい。
そして、例えば、図１０に示す従来の装置の第１の溢流槽３と第２の溢流槽４との間の隔壁近傍であって、第１の溢流槽３内に多段ではなく１本のマグネット（鎖線で示す）を配置するようにして使用することもできる。
また、上記実施形態では、プレス鋼板洗浄機用の浄油装置について説明したが、それ以外の洗浄油の浄油装置にも使用できる。
【００３２】
【発明の効果】
以上説明してきたように、請求項１に記載した発明によれば、プレス鋼板を洗浄した洗浄済油が通路を下流側に向かって流れる際に堰部材を乗り越えると堰部材の下流側で撹拌されて乱流が発生するため、含有する切粉は沈殿することなく撹拌されて下流側のマグネットの上方と下方を流過する際にマグネットにより磁着される。したがって、通路を流れる間に切粉を確実にマグネットに磁着させ、効率よく切粉を洗浄済油から除去することができる効果がある。
【００３４】
請求項２に記載した発明は、マグネットの上方を流れる洗浄済油とマグネットと堰部材との間を流れる洗浄済油に含まれる切粉はマグネットに磁着されるため、フィルターを用いた場合に比較して、短時間で切粉を除去できる。また、マグネットに付着した切粉を除去すればよいだけなのでメインテナンスも行い易く、フィルターのように使用済みのものを廃棄して新品のものと交換する必要がないためランニングコストも低減できる。
【００３５】
請求項５に記載した発明によれば、マグネットの上方を流れる洗浄済油とマグネットと堰部材との間を流れる洗浄済油に含まれる切粉は、切粉を磁着できるマグネットの磁束密度３００ガウスの範囲内で確実にマグネットに磁着されるため、各マグネット、堰部材を通過しながら洗浄済油に含有する切粉は確実に磁着されるという効果がある。したがって、フィルターを用いた場合に比較して、短時間で切粉を除去できる。また、マグネットに付着した切粉を除去すればよいだけなのでメインテナンスも行い易く、フィルターのように使用済みのものを廃棄して新品のものと交換する必要がないためランニングコストも低減できる。
【００３６】
請求項４に記載した発明によれば、少なくとも洗浄済油内の切粉を磁着するために必要な磁束密度３００ガウスが堰部材の上流側の面上及び油面において確保できるため、堰部材にさしかかる手前で確実に切粉を磁着することができる効果がある。
【図面の簡単な説明】
【図１】 この発明の実施形態の要部拡大説明図である。
【図２】 図１の要部拡大図である。
【図３】 この発明の実施形態の浄油装置の側断面図である。
【図４】 支持台及び浄油ユニットのセット状態の平面図である。
【図５】 ステーの正面図である。
【図６】 支持台の平面図である。
【図７】 支持台の正面図である。
【図８】 支持台の側面図である。
【図９】 磁束密度と距離を示すグラフ図である。
【図１０】 従来技術の構成図である。
【符号の説明】
２２ 浄油部（通路）
２６ 堰部材
２７ マグネット
Ｌ 磁着可能距離
Ｄ 磁着可能深さ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil purifier for a washing machine such as a pressed steel sheet washer, and in particular, a cleaning machine that can effectively remove adhering chips (iron powder) such as press-formed blanking steel sheet material. It relates to an oil device.
[0002]
[Prior art]
It is known that when a rolled steel plate material used in an automobile production line is blanked, chips of about 20 microns are generated by being mixed with fibers mixed during work. If the chips adhere to the surface of the blanking material, slight irregularities are formed on the surface during subsequent bending or drawing. Therefore, there is a problem that it takes a lot of time to smooth out the unevenness in the polishing step before painting.
Therefore, the oil purifier of the pressed steel plate washing machine that can effectively remove the adhering chips of the blanked steel plate material by cleaning and brushing the surface of the steel plate material with cleaning oil for a short time after blanking has been used. (See, for example, JP-A-3-94806).
[0003]
An example of this will be described with reference to FIG. 10. In FIG. 10, reference numeral 1 denotes a cleaning machine, which injects cleaning oil onto a steel plate material blanked by a pressing device (not shown). The washed oil from the washing machine 1 is guided to the first overflow tank 3, the second overflow tank 4, and the third overflow tank 5 in the tank 2. A magnet 6 is provided at the bottom of the first overflow tank 3, and the washed oil is sent to the second overflow tank 4 by magnetizing the chips that have sunk at the bottom. The washed oil in the second overflow tank 4 is filtered by an electric oil purifier 9 having a filter 7 and a magnet 8 and sent to the third overflow tank 5. The washed oil inside is sent to the filter unit 10 including the filter 7 and the magnet filter 8A and is returned to the third overflow tank 5 again. Thus, the cleaning oil from which dust is removed by the electric oil purifier 9 and the filter unit 10 is fed to the cleaning machine 1.
[0004]
[Problems to be solved by the invention]
However, in the conventional oil purifier of the pressed steel sheet washer, the cleaned oil in the tank 2 is circulated through the electric oil purifier 9 and the filter unit 10 to remove dust such as iron powder in the cleaned oil. Therefore, there is a problem that it takes a long time to purify.
Moreover, since each filter 7 needs to be replaced | exchanged regularly when clogged, there exists a problem that the frequency of maintenance becomes high. In particular, if the chips cannot be adsorbed by the magnet 8 and the magnet filter 8A, the chips flowing downstream will clog each filter 7, resulting in a problem that the frequency of filter replacement increases and the cost increases.
Therefore, the present invention provides an oil purifier for a washing machine that can efficiently and efficiently remove chips in a short time, can be easily maintained, and can be reduced in cost.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problem, the invention described in claim 1 is directed to a passage (for example, the oil purifying unit 22 in the embodiment) through which the washed oil flows, and a magnet (for example, implementation) provided across the passage. A plurality of magnets 27) are arranged in the flow direction of the washed oil, and a dam member (for example, a dam member 26 in the embodiment) is provided in the vicinity of the downstream side of each magnet, and the washed oil is disposed above the magnet. and characterized that you configured to pass under.
By constructing in this way, when the washed oil flows over the passage toward the downstream side, it gets agitated on the downstream side of the weir member and generates turbulent flow, so that the contained chips settle. It is agitated without being magnetized by the magnet when it passes above and below the downstream magnet.
[0006]
In the invention described in claim 2 , the magnet is disposed at a position where the chips on the upstream surface of the dam member can be magnetically attached, and further, the washed oil overflows the upper edge of the dam member. It is characterized in that the chips on the oil surface are disposed at a depth that can be magnetized.
With such a configuration, the cleaned oil flowing above the magnet and the chips contained in the cleaned oil flowing between the magnet and the weir member are magnetically attached to the magnet.
[0007]
According to a third aspect of the present invention, the magnets are arranged with a magnetizable distance (for example, a magnetizable distance L in the embodiment) that can secure at least 300 Gauss of the magnetic flux density on the upstream surface of the weir member. Furthermore, at the position of the magnetically attachable depth (for example, the magnetically attachable depth D in the embodiment) that can secure at least 300 gauss of the magnetic flux density on the oil surface of the washed oil that overflows the upper edge of the dam member. It is arranged.
With this configuration, the cleaning oil flowing above the magnet and the cleaning oil contained in the cleaning oil flowing between the magnet and the weir member have a magnetic flux density of 300 gauss in which the chip can be magnetized. The magnet is securely attached to the magnet.
[0008]
The invention described in claim 4 is characterized in that the magnet is at least 1300 gauss or more, and the magnetizable distance and the magnetizable depth are 7 mm or less.
By configuring in this way, at least 300 gauss of magnetic flux density necessary for magnetizing the chips in the washed oil can be secured on the upstream surface and the oil surface of the weir member.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 3 is a cross-sectional view of an essential part showing an oil purifier for a pressed steel sheet washer according to an embodiment of the present invention. The oil purifier 11 of this press steel plate washer is attached to a washer (not shown) for cleaning blanked steel plate material in, for example, an automobile body production line, and has been used in this washer. The oil is recovered to remove internal dust, particularly 20 micron chips, and supply clean cleaning oil to the cleaning machine.
The oil purifier 11 includes a case main body 12 and an oil purifying unit 13 that is fixed (welded) or detachably attached thereto.
The case body 12 includes a return portion 15 to which an IN side pipe 14 to which a return pipe for cleaned oil (not shown) is connected is attached. An inclined surface 16 inclined downstream is formed at the bottom of the return portion 15, and a drain pipe 17 is connected to the lower end of the inclined surface 16 at the bottom.
[0010]
Further, the case body 12 includes a feed unit 20 to which an OUT side pipe 19 to which a cleaning oil delivery pipe (not shown) is connected is attached. The feed unit 20 is formed to have a shallower bottom than the return unit 15, and a drain pipe 21 is connected to the bottom of the feed unit 20. Between the return part 15 of the case main body 12 and the feed part 20, an oil purifying part (passage) 22 is provided which has a bowl shape and has a substantially constant depth dimension (a dimension that is considerably shallower than the feed part 20). A support base 23 in which the oil purification unit 13 is set is detachably installed in the oil purification unit 22.
H denotes a lid that closes the upper opening of the case body 12.
[0011]
FIG. 4 is a plan view showing a state where the oil purification unit 13 is set on the support base 23. The support base 23 is formed of an aluminum material in order to prevent adsorption to a magnet described later. The support base 23 has a guide wall 24 standing on the long side portion when viewed from the plane shown in FIG. 6 (see FIG. 7) and extends downward on the short side portion when viewed from the plane (see FIGS. 7 and 8). ) A locking wall 25 is provided. The guide wall 24 holds the oil purifying unit 13 described later in the width direction, and the locking wall 25 locks the support base 23 to the oil purifying portion 22 of the case main body 12.
[0012]
The oil purification unit 13 includes a pair of stays S (see FIG. 5) made of an aluminum plate arranged along the guide wall 24 of the support base 23, and a weir member 26 made of an aluminum plate (FIG. 3). 4) and a cylindrical magnet 27 (see FIG. 3 and FIG. 4) are ladder-shaped members.
As shown in FIG. 5, the stay S is formed with recesses 28 to 31 for setting the magnet 27 at a predetermined height at the upper edge portion at four locations. The first concave portion 28, the second concave portion 29, the third concave portion 30, and the fourth concave portion 31 are formed in order from the left, and the second concave portion 29 and the third concave portion 30 are formed at the same depth. The depth dimension is smaller than the second and third recesses 29 and 30, and the fourth recess 31 is formed with a depth dimension larger than that of the second and third recesses 29 and 30. Further, as shown in FIG. 5, the stay 32 has a slit 32 for setting the weir member 26 at the lower edge portion at a predetermined height, close to the downstream side (right side in FIG. 5) of each of the recesses 28 to 31. Is formed.
[0013]
The weir member 26 has a width corresponding to each slit 32 shown in FIG. 5, is attached in a state of being spanned over a pair of stays S like the magnet 27, and abuts against the guide wall 24 of the support base 23. Is to be placed. Each dam member 26 has a different dimension in the height direction. The dam members 26 corresponding to the second and third recesses 29 and 30 are formed to have the same dimension, and the dam member 26 corresponding to the first recess 28. Is larger in height than the weir member 26 corresponding to the second and third recesses 29 and 30, and the weir member 26 corresponding to the fourth recess 31 is more than the weir member 26 corresponding to the second and third recesses 29 and 30. The height dimension is small.
[0014]
The magnet 27 is a cylindrical member as shown in FIGS. 3 and 4, and is formed by bonding a plurality of short cylindrical magnets at the end surfaces thereof.
In this embodiment, two types are used: a 1300 G (Gauss) magnet 27 set in the first recess 28, the second recess 29, and the third recess 30, and an 8000 G magnet 27 set in the fourth recess 31. Is done. As will be described later, as long as the magnetic flux density 300G is secured within a certain range, the magnets used and the arrangement order of the magnets are not limited thereto.
[0015]
Here, the formation place of the slit 32 to which the first to fourth concave portions 28 to 31 in which the magnet 27 is set and the dam member 26 is attached will be described.
The slit 32 is formed at a position 7 mm away from each of the recesses 28 to 31. This is because when a 1300 G magnet having the smallest magnetic flux density is used, a magnetic flux density of 300 G can be secured at a location 7 mm away from the position of the magnet.
[0016]
FIG. 9 is a graph showing characteristics of four types of magnets (12000G, 10000G, 8000G, 1300G) having a diameter of 25 mm and different magnetic flux densities.
As shown in the figure, the magnetic flux density (G) is shown on the vertical axis and the distance (mm) is shown on the horizontal axis, and in order to secure the magnetic flux density of 300 G, it is necessary to approach 7 mm when using a 1300 G magnet. I understand.
[0017]
Table 1 below shows that iron powder can be magnetized when a 1300 G magnet is brought close to 7 mm.
In experiments, it has been found that when iron powder composed of particles of 20 microns or less is magnetized with a 1300 G magnet having a length of 244 mm and a diameter of 25 mm, all iron powder can be magnetized at a distance of 7 mm.
Therefore, when the magnetic flux density is larger than 300 G, or when the magnet and the iron powder are closer than 7 mm, the chips can be reliably magnetized.
[0018]
[Table 1]

[0019]
Accordingly, the interval between the recesses 28 to 31 and the slit 32 formed in the stay S is set to 7 mm as described above, and the depth of the recesses 28 to 31 and the position of the upper edge of the slit 32 are the magnet 27 and the weir. In a state where the member 26 is set on the stay S and attached to the oil purifying unit 22 via the support base 23, the distance from the oil level of the washed oil overflowing the weir member 26 to the upper edge of the magnet 27 becomes 7 mm. Is set to
Further, the height from the surface of the support base 23 to the upper edge of each dam member 26 is 45 mm, 35 mm, 35 mm, and 25 mm in order from the first dam member 26, and two drops occur on the oil surface. ing. It is sufficient that there is at least one head.
[0020]
Thus, the oil purifying unit 13 configured by setting the magnet 27 in each of the recesses 28 to 31 of the stay S and attaching the dam member 26 to each slit 32 is set on the support base 23 (see FIG. 4). State), as shown in FIG. 3, the support 23 may be set on the oil purifying section 22 of the case body 12.
As a result, when the oil purification unit 13 is set on the case body 12 via the support base 23, four magnets 27 provided so as to cross the oil purification unit 22 are arranged in the flow direction of the washed oil. At the same time, the weir member 26 is disposed in the vicinity of the downstream side of each magnet 27.
[0021]
That is, as shown in FIGS. 1 and 2, each magnet 27 is magnetically attached to the weir member 26 so that at least 300 G of magnetic flux density can be secured on the upstream surface of the weir member 26 (in the case of a magnet of 1300 G). Depth of magnetic attachment D (= 7 mm) which is arranged at a possible distance L (= 7 mm) and further can secure at least 300 G of magnetic flux density on the surface of the washed oil overflowing the upper edge of the weir member 26. It will be arranged in the position.
[0022]
In addition, although the oil purifying apparatus 11 of this embodiment has demonstrated only the part which removes a chip, the filter which does not illustrate for removing dusts, such as a fiber, is attached to the downstream of the OUT side piping 19. FIG. ing. This filter is a filter with low filtration accuracy so as not to cause clogging due to chips.
[0023]
Next, the operation will be described.
Washed oil sent from a washing machine (not shown) enters the return portion 15 from the IN side pipe 14 of the case body 12 and fills the return portion 15, and then wraps around the upper side and the downstream side of the first magnet 27. The first dam member 26 is reached. At this time, since the magnetizable distance L and the magnetizable depth D are secured, the magnetic force acting by the magnet 27 is 300 G on the oil surface and the upstream surface of the weir member 26. Therefore, most of the chips contained in the washed oil are magnetically attached to the magnet 27.
[0024]
That is, since all the washed oil passes through the narrow flow path determined by the magnetizable distance L and the magnetizable depth D, it is efficiently magnetically attached to the magnet 27 in this flow path.
When passing through this flow path, there is a possibility that chips that are not magnetically attached by the magnet 27 may remain due to the flow velocity and viscosity of the washed oil. Therefore, a plurality of magnets 27 are used on the downstream side. -ing
[0025]
Next, the washed oil that flows so as to overflow from the first dam member 26 forms a turbulent flow on the downstream side immediately after the dam member 26 after getting over the dam member 26, so that it could not be magnetized. The chips are agitated without accumulating on the bottom surface of the oil purification unit, more precisely on the surface of the support base 23. Therefore, chips do not collect on the lower side and flow downstream. In particular, since the height of the second dam member 26 is lower than that of the first dam member 26, a drop is formed on the oil surface, which is a factor that can create a large turbulent flow.
[0026]
Similarly, the chips are magnetized by the second, third, and fourth magnets 27. In particular, since a magnet having a magnetic flux density of 8000 G is used for the fourth magnet 27, chips can be more strongly magnetized in this portion. In addition, since the height of the fourth dam member 26 is further lower than the third dam member 26, a drop is formed on the oil surface and a large turbulent flow can be formed here, and the chips are on the lower surface. The accumulation is surely prevented.
[0027]
In this way, the chips are surely magnetized by the magnets 27, so that the feeding part 20 of the case body 12 is filled with the cleaning oil from which the chips have been removed. Then, the cleaning oil sent from the OUT side pipe 19 to a filter (not shown) to remove the fibrous dust is sent to the cleaning machine and reused for cleaning the blanked steel sheet material.
[0028]
Here, during the maintenance, if the oil purification unit 13 is a fixed type, the magnet 27 is removed, and the work can be performed simply by wiping off the iron powder that is the cutting powder with a waste cloth or the like. There is no need to stop the device. Further, when the oil purification unit 13 is a detachable type, the support base 23 or only the oil purification unit 13 is removed, and the chips stuck to the magnets 27 are removed, or a new one prepared separately. If the oil purification unit 13 is replaced, maintenance can be performed in a very short time. Therefore, the running cost can be reduced because the reusable oil purifying unit 13 is used as compared with the conventional case where the used filter must be discarded.
[0029]
Therefore, according to this embodiment, when the washed oil that has washed the pressed steel plate flows over the oil purifying section 22 toward the downstream side, the turbulent flow is agitated on the downstream side of the dam member 26 and is agitated. Therefore, the contained chips are agitated without being precipitated and are magnetized by the magnet 27 on the downstream side. Therefore, the chips can be securely attached to the magnet 27 while flowing through the oil purification unit 22.
Further, the chips contained in the washed oil flowing above the magnet 27 and the washed oil flowing between the magnet 27 and the weir member 26 are within the range of the magnetic flux density 300G of the magnet 27 on which the chips can be magnetized. Since the magnet 27 is surely magnetized, the chips contained in the washed oil can be reliably magnetized while passing through the magnets 27 and the weir member 26.
[0030]
Therefore, the chips can be removed in a short time compared to the case where the chips are collected with a filter as in the prior art. Also, since it is only necessary to remove the chips adhering to the magnet 27 in order to reuse, it is easy to maintain, and it is not necessary to discard the used one like a filter and replace it with a new one. Cost can also be reduced.
[0031]
The present invention is not limited to the above embodiment. For example, if the magnetic flux density can be ensured, the magnetic field strength and the number of magnets 27 arranged are not limited to those of the above embodiment. In addition, it is best mode that the magnetizable distance L and the magnetizable depth D described in the embodiment are 7 mm when a 1300 G magnet is used. The number of magnets may be increased by giving a certain width, for example, a range up to 15 mm where 95% can be adhered.
And, for example, in the vicinity of the partition wall between the first overflow tank 3 and the second overflow tank 4 of the conventional apparatus shown in FIG. It is also possible to use a book magnet (indicated by a chain line).
Moreover, although the said embodiment demonstrated the oil purifier for press steel plate washing machines, it can be used also for the oil purifier of other washing oil.
[0032]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the washed oil that has washed the pressed steel sheet flows over the passage toward the downstream side, the oil is stirred on the downstream side of the weir member. Since turbulent flow occurs, the contained chips are agitated without being settled, and are magnetized by the magnet when flowing over and below the downstream magnet. Therefore, there is an effect that the chips can be securely attached to the magnet while flowing through the passage, and the chips can be efficiently removed from the washed oil.
[0034]
In the invention described in claim 2 , since the washed oil flowing above the magnet and the washed powder contained in the washed oil flowing between the magnet and the weir member are magnetically attached to the magnet, the filter is used. In comparison, the chips can be removed in a short time. Further, since it is only necessary to remove the chips adhering to the magnet, maintenance is easy, and it is not necessary to discard the used ones like a filter and replace them with new ones, so that the running cost can be reduced.
[0035]
According to the fifth aspect of the present invention, the cleaning oil flowing above the magnet and the cleaning powder contained in the cleaning oil flowing between the magnet and the weir member are magnet flux density 300 of the magnet capable of magnetizing the cutting powder. Since it is reliably magnetized to the magnet within the Gaussian range, there is an effect that the chips contained in the washed oil are reliably magnetized while passing through each magnet and the weir member. Therefore, chips can be removed in a shorter time than when a filter is used. Further, since it is only necessary to remove the chips adhering to the magnet, maintenance is easy, and it is not necessary to discard the used ones like a filter and replace them with new ones, so that the running cost can be reduced.
[0036]
According to the invention described in claim 4 , since a magnetic flux density of 300 gauss necessary for magnetizing at least the chips in the washed oil can be secured on the upstream surface of the weir member and on the oil surface, the weir member There is an effect that the chips can be surely magnetized before approaching.
[Brief description of the drawings]
FIG. 1 is an enlarged explanatory view of a main part of an embodiment of the invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a side sectional view of the oil purifier according to the embodiment of the present invention.
FIG. 4 is a plan view of a support base and an oil purification unit in a set state.
FIG. 5 is a front view of the stay.
FIG. 6 is a plan view of a support base.
FIG. 7 is a front view of a support base.
FIG. 8 is a side view of the support base.
FIG. 9 is a graph showing magnetic flux density and distance.
FIG. 10 is a configuration diagram of a conventional technique.
[Explanation of symbols]
22 Oil purification section (passage)
26 Weir member 27 Magnet L Possible magnetic attachment distance D Possible magnetic attachment depth

Claims (4)

A plurality of magnets provided across the passage are arranged in a passage through which the washed oil flows, and a weir member is provided in the vicinity of the downstream side of each magnet , and the washed oil is configuration was this the oil purification device of the washing machine according to claim so as to pass above and below the magnet. The magnet is disposed at a position where the chips on the upstream surface of the weir member can be magnetized, and further, the magnet on the surface of the washed oil overflowing the upper edge of the weir member is magnetized. 2. The oil purifier for a washing machine according to claim 1 , wherein the oil purifier is disposed at a possible depth. The magnets are arranged on the upstream surface of the dam member at a magnetically separable distance at which a magnetic flux density of at least 300 gauss can be secured, and further on the oil surface of the washed oil that overflows the upper edge of the dam member. 3. The oil purifier for a washing machine according to claim 2 , wherein the oil purifier is disposed at a position where the magnetic flux density can be secured at least at a depth capable of securing 300 Gauss. 4. The oil purifier for a washing machine according to claim 3 , wherein the magnet is at least 1300 Gauss or more, and the magnetizable distance and the magnetizable depth are 7 mm or less. 5.

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