JP5149661B2 - Drum filter device, filter surface member used therefor, and method for replacing the filter surface member - Google Patents

Description

  The present invention relates to a drum filter device that extracts clarified coolant by filtering a turbid liquid of chips and coolant generated during metal cutting, and a filter face member used therefor, and The present invention relates to a method for replacing the filter face member.

  The drum filter device of Patent Document 1 is used as a filtration main part of a filtration / separation / extraction device. The filtration / separation / extraction device includes solids such as chips generated by metal cutting, lubrication and cooling. By continuously introducing a turbid liquid composed of a liquid material such as a coolant as an agent, the suspension is efficiently separated into a purified liquid material and a solid material by a drum filter device. It functions to continuously take out to a certain place.

More specifically, the drum filter device is configured so that the center line of the outer peripheral wall surface thereof is horizontal and can be driven to rotate around the center line in the suspension storage tank into which the suspension is introduced. In addition to being installed, the inside of the suspension reservoir and the inner space of the outer peripheral wall portion are partitioned so that liquid can only pass through the filter surface member, and existed in the lower portion of the outer peripheral wall portion of the drum filter device. The filter surface member is immersed in the suspension, and the purified liquid material that has passed through the filter surface member flows into the purified liquid tank through the inside of the outer peripheral wall surface. The solid material that does not pass through the filter face member is accumulated in the suspension reservoir and is carried out by other conveyor means.
Japanese Patent No. 2904334

  In the conventional drum filter device disclosed in Patent Document 1, through holes are formed in the outer peripheral wall surface portion, and the filter surface member is fixed to this, so that the area of the outer peripheral surface portion of the device is The ratio of the effective filtration area of the filter surface member to the above is limited to a certain level or less, and the efficiency of the filtration process is suppressed, and the structure for mounting the filter surface member is complicated, and it is not easy to attach and remove the filter surface member .

  The present invention has been described above, for example, in the case where the purified coolant from which chips are removed is extracted from a turbid liquid of chips generated during metal cutting and the like and coolant as a lubricant and / or coolant. The purpose is to solve various problems.

  In order to solve the above problems, a drum filter device according to the present invention includes side members facing each other at a predetermined distance, and can be bent in an annular fitting groove formed on an outer peripheral edge of the side member. One filter face member is slidably and densely fitted to the full length portions of both end edges opposed in the width direction, and both end edges opposed in the longitudinal direction of the filter face member are distance adjusting members. It is characterized by being tightly coupled via the.

According to the present invention, since the filter surface member is mounted between substantially the entire peripheral portions of the outer peripheral edge of the side member, the ratio of the effective filtration area of the filter surface member to the area of the outer peripheral surface portion of the drum filter device is conventionally increased. And the filtration efficiency is improved.
Also, when the manufacturing error of the outer peripheral length of the side member and the longitudinal dimension of the filter surface member or the dimensional error due to expansion and contraction due to long-term use of the filter surface member, the thickness direction dimension of the spacing adjustment member changes to large or small. By doing so, both end edges opposed in the width direction of the filter face member are closely fitted to the annular fitting groove of the side face member, and as a result, the filter face member seals on the side face member. And the planned filtration performance is ensured.

The filter surface member used in the drum filter device according to the present invention is wound between the entire lengths of the outer peripheral edges of the side members facing each other with a certain distance between them, and both end edges opposed in the width direction Are fitted in a ring-shaped fitting groove formed on the outer peripheral edge of the pair of side members so as to be slidable and densely and restricted in the width direction, and in the longitudinal direction. A pair of flange portions that protrude outward in the radial direction of the side member and are coupled in a male-female relationship are provided at opposite end edges, and each flange portion includes a first surface portion along the radial direction and the width direction, and The outer peripheral edge and a second surface portion along the width direction are provided . And a clip member is externally fitted so as to straddle the pair of flange portions in a state where the packing is densely interposed between the first surface portions of each flange portion and between the second surface portions. Thus, the drum filter device is mounted.

  In the drum filter device according to the present invention, the filter surface member replacement method is such that when the filter surface member in the drum filter device is replaced, the circumferentially constant range portion is removed, and the filter surface member is already fitted in the annular fitting groove. Clip one of the used filter surface members and one flange portion of the flange portion of the filter surface member to be used next to one flange portion to form a male-female relationship. In this case, the filter member is coupled in a face-to-face manner through a member, and then the used filter surface member is pulled out from the annular fitting groove along the longitudinal direction.

  According to the present invention described above, the ratio of the area of the effective filter surface of the filter surface member to the area of the outer peripheral surface portion of the drum filter device can be increased as compared with the prior art, and the filtration efficiency can be improved. Since both ends of the filter surface member facing each other in the width direction are fitted in the pair of annular fitting grooves, the structure for mounting the filter surface member is provided as compared with the conventional case. As a result, the filter surface member can be easily and quickly removed.

  Furthermore, the thickness of the gap adjusting member is changed to a large or small size when an error occurs in the length of the outer peripheral edge of the side member, the longitudinal dimension of the filter surface member, or a dimensional error due to expansion and contraction due to long-term use of the filter surface member. Thus, the opposite end edges of the filter surface member in the width direction are closely fitted to the annular fitting groove of the side member, and as a result, the sealing performance of the filter surface member on the side member Is ensured and the planned filtration performance is ensured.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory perspective view showing an outline of a filtration / separation / extraction device equipped with a drum filter device according to the present invention.

  Reference numeral 1 denotes a rectangular container that also serves as a base. A pair of left and right standing partition plates 2a and 2b that divide the container 1 into three compartments 1A, 1B, and 1C are fixed along the front-rear direction a inside the rectangular container 1. In front of the pair of upright partition plates 2a and 2b, a forwardly-inclined inclined guide path 3 is formed by extending the central section 1A forward in a liquid-tight manner. The lower front edges of 2a and 2b are joined by an inclined flat plate 4. At this time, the section 1A is a single liquid-tight container, but the sections 1B and 1C communicate with each other at the lowermost front side b1 of the inclined guide path 3.

  The drum filter device 5 according to the present embodiment can be rotated between a center part c1 and c2 in the front-rear direction a of each of the standing partition plates 2a and 2b in the rectangular container 1 via a fixed support tube 6 having a central axis in the left-right direction. Is installed. A substantially semicircular through hole d2 is formed at a location where the drum filter device 5 faces the upright support plate 2b and is located below the fixed support tube 6.

Next, details of the drum filter device 5 will be described with reference to FIGS.
2 and 3 are a perspective view and a longitudinal sectional view of the drum filter device 5, FIG. 4 is a side view showing one member of the drum filter device 5, and FIG. 5 is a sectional view showing a part of the drum filter device 5.

  The drum filter device 5 includes left and right side members 7a and 7b having a circular shape when viewed from the side, and a filter surface member 8 mounted between all peripheral portions of the outer peripheral edges of the side members 7a and 7b. The side member 7b includes a sprocket member 9b, while the side member 7a includes a disk-like member 9a having a radius corresponding to the position of the tooth bottom of the sprocket member 9b. The reason why the sprockets are not provided on both of the side members 7a and 7b is for the purpose of cost reduction, and both may be used as sprocket members. At the center position of the side members 7a and 7b, stepped cylindrical bearing housings 10a and 10b into which the fixed support tube 6 is inserted are fixed, and the bearing housings 10a and 10b are fixed to the inner surfaces of the side members 7a and 7b. In addition to annular members 11a and 11b having outer peripheral edges e1 and e1 formed concentrically with 10b, annular seal portions 12a and 12b are formed on the outer surfaces of the side members 7a and 7b with bearing housings 10a and 10b. It is fixed concentrically.

  As shown in FIG. 4, in the sprocket member 9b, an outer ring portion f2 having meshing teeth f1 formed at a constant pitch on the outer periphery and an inner ring portion f3 having a bearing housing 10b fixed thereto are coupled by a plurality of arm portions f4. A through-hole through which coolant passes is provided between the outer ring portion f2 and the inner ring portion f3. In the bearing housing 10b, a ball bearing 13 is fitted in the center in the left-right direction of the inner hole, and oil seals 14b are fitted on both the left and right sides of the ball bearing 13. The ball bearing 13 is externally fitted to the fixed support tube 6 to enable the drum filter device 5 to rotate, and the oil seal 14b prevents coolant from entering the bearing housing 10b.

  Unlike the sprocket member 9b, the disc-like member 9a does not have the meshing tooth f1 and does not have a through hole through which the coolant passes. As shown in FIG. 3, the bearing housing 10 a has a ball bearing 13 fitted at the center in the left-right direction of the inner hole and oil seals 14 a fitted on both the left and right sides of the ball bearing 13.

  As shown in FIG. 5, each of the annular members 11a and 11b includes an annular main body g1, two to four arc-shaped strips g3 arranged in an annular shape so as to cover the entire peripheral range of the foundation outer peripheral surface g2, and It comprises a screw member g4 for fixing the arc-shaped strip g3 to the annular main body g1. An annular fitting groove g5 that is surrounded by the annular main body g1 and the arc-shaped strip g3 and is annularly opened on the inner side surface is formed on the outer peripheral edge of each annular member 11a, 11b. In this embodiment, two arc-shaped strips g3 are mounted, one sheet covering the annular main body part g1 in the range of 120 degrees, and the other sheet in the range of 240 degrees. Covering 360 degrees all around.

  FIG. 5 shows details of each annular fitting groove g5. Each annular main body g1 has a first groove outer peripheral surface g6 having a smaller diameter than the basic outer peripheral surface g2 and a second groove having a smaller diameter than the first groove outer peripheral surface g6. It has a groove outer peripheral surface g7. An arc-shaped strip g3 is fixed to the foundation outer peripheral surface g2 via a screw member g4 so as to cover the radially outer sides of the first groove outer peripheral surface g6 and the second groove outer peripheral surface g7. Thereby, the annular fitting groove g5 includes the insertion groove part g51 and the locking groove part g52.

  The arc-shaped strip g3 can be removed from the circumferentially fixed range portion of the wall portion on the radially outer side of the annular fitting groove g5 by removing one piece of 120 ° from the annular main body g1. When the four circular arc strips g3 surround the annular main body g1, by removing one, the annular fitting groove g5 has a 90 ° range centered on the fixed support tube 6 and is radially outward. When the wall surface portion is removed and opened, and the three arc-shaped strips g3, an opening toward the circumferential direction is formed at the end of the open range of 120 degrees. In any case, the arc-shaped strip g3 to be removed has an angle smaller than 180 degrees. The reason for this will be described later.

  Each annular seal portion 12a, 12b has a support ring member h1 fixed concentrically to the outer surface of the side members 7a, 7b, and a rubber material or a synthetic resin material fixed to the outer peripheral surface of the support ring member h1. And an annular elastic member h2. The annular elastic member h2 includes a base part h20 fixed to the support ring member h1, and a tongue-like part h21 projects obliquely outward from the base part h20.

Next, the filter surface member 8 will be described. FIG. 6 is a view showing the filter surface member 8, FIG. 7 is a cross-sectional view showing a part of the filter surface member 8, and FIG. 8 is a perspective view of the filter surface member 8.
The filter surface member 8 is a rectangular thin filter body that is entirely injection-molded with a synthetic resin material such as plastic, and a pair of end edges 8a and 8b facing each other in the width direction j1 are made thick so that the left and right side members 7a. , 7b so as to fit in the annular fitting groove g5. A pair of end edges 8c, 8d facing each other in the longitudinal direction j2 are thickened, and flanges 8e, 8f having a male-female relationship are formed on the end edges 8c, 8d in a protruding shape. Beam portions 8g in the width direction j1 are formed at regular intervals in the longitudinal direction j2, and beam portions 8h in the longitudinal direction j2 are also formed at positions at regular intervals in the width direction j1 to connect the edges. The enclosed area is divided into a plurality of sections to increase the overall rigidity. In the filter surface member 8, a portion excluding the four peripheral edges 8a, 8b, 8c and 8d and the beam portions 8g and 8h is an effective filter surface 8i having filter eyes. At this time, as shown in FIG. 8, the cross-joining portion between the beam portion 8g and the beam portion 8h, and the joining portion between the beam portions 8g and 8h and the effective filtering surface 8i are arcuate surfaces so that discontinuities of the shape are not formed. It continues smoothly at 8j. The vertical and horizontal stitches constituting the effective filtration surface 8i are parallel to the longitudinal direction j2 and the width direction j1, respectively.

  Explaining each part of the filter surface member 8, the left and right end edges 8a, 8b opposed in the width direction j1 have a symmetrical structure. Referring to FIG. 7A, the right side edge 8b will be described as a representative example. An insertion surface portion k1 that is inserted into the insertion groove portion g51 of the annular fitting groove g5, and an annular fitting groove g5 that is formed at the tip of the insertion surface portion k1. In addition to a locking ridge k2 fitted in the locking groove g52, it is also plastically deformed freely in the vertical direction in FIG. 7A at substantially the entire length in the longitudinal direction j2 of the outer surface of the locking ridge k1. A protrusion piece k3 is formed. When the locking protrusion k1 is pushed into the locking groove g52 at the portion where the arc-shaped strip g3 is removed, the protruding piece k3 is pushed and bent outward in the radial direction of the side members 7a and 7b. (FIG. 5) is pressed and seals between the locking protrusion k1 and the annular main body g1. Since the locking protrusion k1 is locked with a clearance in the locking groove g52, the locking protrusion k1 performs a sealing action inside and outside the filtration drum.

  As shown in FIG. 7B, the male flange portion 8e formed on one end edge 8c of the opposite end edges 8c, 8d facing each other in the longitudinal direction j2 has an abutting circumferential direction plane k4 along the longitudinal direction j2. And a main body plate portion k7 having an abutting radial front surface k6 composed of a plane orthogonal to the longitudinal direction j2 and the width direction j1. Then, as shown in FIG. 7C, the female flange portion 8f formed on the other end edge 8d includes a female plate portion k9 having an abutting circumferential plane k8 along the longitudinal direction j2, a longitudinal direction j2, and And a main body plate portion k11 having an abutting radial front surface k10 composed of a plane orthogonal to the width direction j1. Hereinafter, the contact radial direction front surfaces k6 and k10 are referred to as first surface portions, and the contact circumferential direction plane surfaces k4 and k8 are referred to as second surface portions.

  A method for mounting the filter surface member 8 on the outer peripheral edge of the annular member will be described. FIG. 9 is an explanatory side view showing a state in which the filter surface member 8 is wound around the outer periphery of the annular member g1, and FIG. 10 is a cross-sectional view showing a state in which the male and female flange portions 8e and 8f are coupled.

  The replacement of the filter face member 8 is performed while the sections 1A, 1B, and 1C of the rectangular container 1 are filled with the suspension. As shown in FIG. 11, the suspension has a water level up to the stationary support tube 6 and is in a state where it is immersed in half of the drum filter device 5.

  When the filter surface member 8 is fitted into the annular fitting grooves g5, g5 of the left and right side members 7a, 7b, the screw member g4 and the arc-shaped strip g3 are removed from the annular main body portions g1, g1. First, one circular strip g3 on each of the left and right sides present at the same position on each side member 7a, 7b is removed. The arc-shaped strip g3 is removed within a range of 120 degrees, and the annular fitting grooves g5 and g5 are opened in the circumferential direction on the surface of the suspension.

  Next, one flange portion 8e of the used filter surface member 8 and one flange portion of the flange portions 8e, 8f of the filter surface member 8 to be used next have a male-female relationship with the one flange portion 8e. 8f is coupled in a face-to-face manner via the clip member 16, and then the used filter face member 8 is pulled out from the annular fitting grooves g5 and g5 along the longitudinal direction j2. Instead, the other flange portion 8e of the filter surface member 8 to be used next is coupled to the other flange portion 8f of the used filter surface member 8 via the clip member 16 so as to be opposite to the previous one. You may make it pull out. If it does in this way, the filter face member 8 used next will be pulled and moved by the used filter face member 8.

  If the opening when the arc-shaped strip g3 is removed is larger than 180 degrees, a part of the opening is submerged under the surface of the suspension, and the inside of the drum filter device 5 is contaminated by the external suspension. Will be. However, according to the present embodiment, the inside and outside of the drum filter device 5 can maintain the sealed state even while the filter surface member 8 is being replaced. Since the operation of extracting the suspension from the rectangular container 1 can be omitted, the stop time of the apparatus can be extremely shortened.

  The male and female flange portions 8e and 8f of the filter surface member 8 wound and appropriately tensioned in this way are slightly separated because the overall length of the filter surface member 8 is slightly shorter than that of the annular fitting groove g5. However, between the first surface portions k6 and k10 of the flange portions 8e and 8g and between the second surface portions k4 and k8, an elastic packing 15 made of a rubber material that functions as a gap adjusting member and a seal member is provided. Interpose densely. Here, it is preferable that the elastic packing 15 is continuously arranged between the first surface portions k6 and k10 and between the second surface portions k4 and k8 as a single L-shape in side view.

  Thereafter, as shown in FIGS. 3 and 10, the plurality of clip members 16 are externally fitted between the body plate portions k7 and k11 of the male and female flange portions 8e and 8f at each of a plurality of positions on the width direction j1. The clip member 16 is formed by bending a metal plate such as spring steel, and includes a pair of opening / closing operation portions 16a and 16a, a pair of pressing portions 16b and 16b, and a coupling portion 16c that couples the pressing portions 16b and 16b. ing. As a result, the pressing portions 16b and 16b are brought into pressure contact with the recesses m1 and m2 shown in FIG. 7 on the back of the corresponding main body plate portions k7 and k11 to bring the pair of main body plate portions k7 and k11 close to each other, thereby elastic packing 15 The pair of main body plate portions k7 and k11 are tightly coupled in a state where the pressure is sandwiched. Thereafter, the left and right arc-shaped strips g3 and g3 previously removed are fixed to the original state. Since the arc-shaped band plate g3 presses the second surface portions k4 and k8 of the male and female flange portions 8e and 8f close to each other, the male plate portion k5 and the female plate portion k9 particularly have respective end portions 8a in the width direction j1. , 8b, and the elastic packing 15 is pressed in close contact with each other, and the elastic packing 15 and the projecting piece k3 cooperate to join the left and right side members 7a, 7b and the filter surface member 8 together. The sealability of the part is maintained well.

  FIG. 12 shows a filter surface member in another embodiment. The filter surface member of FIG. 12A is obtained by changing the stitch direction of the effective filtration surface 8i of FIG. 6, and the other configurations are the same. The difference is that it has an effective filtering surface 8k having a stitch in a direction in which the vertical or horizontal stitch intersects with the extending direction of the beam portions 8g and 8h. The vertical and horizontal stitches of the filter surface member in FIG. 6 are parallel to the longitudinal direction j2 and the width direction j1, respectively, and coincide with the direction of the beam portions 8g and 8h, and therefore are easily bent in the vertical direction or the horizontal direction. . On the other hand, according to the filter surface member shown in FIG. 12A, the stitches of the effective filtration surface 8i intersect with the beam portions 8g and 8h, so that the stitches of the effective filtration surface 8i contribute to improving the strength. be able to.

  The filter surface member of FIG. 12B is provided with beam portions 8m and 8n that extend in the intersecting direction and connect to adjacent edges (for example, 8a and 8b) to enhance synthesis. The extending directions of the beam portions 8m and 8n also intersect each other. In this filter surface member, the vertical and horizontal stitches constituting the effective filtration surface 8i are parallel to the longitudinal direction j2 and the width direction j1, respectively, and intersect with the extending direction of the beam portions 8m and 8n. Yes. The net | network which comprises the effective filtration surface 8i is cut | judged from the roll material parallel to the direction of either the vertical or horizontal stitches. Since the filter surface member does not need to obtain the rigidity of the mesh as in the case of FIG. 12A, the direction of the edges 8a, 8b, 8c, and 8d is made coincident to facilitate manufacture.

  The filter face member of FIG. 12C is obtained by dividing the region surrounded by the edges into honeycomb structure sections to enhance synthesis. The vertical and horizontal stitches constituting the effective filtration surface 8j are parallel to the longitudinal direction j2 and the width direction j1, respectively. Each of the filter surface members shown in FIG. 12 is a rectangular thin filter body in which an end edge and a beam portion are integrally formed by injection molding with a synthetic resin material such as plastic on a net constituting an effective filtration surface. .

Next, the peripheral structure of the drum filter device will be described with reference to FIGS.
The fixed support tube 6 has coupling flange members 17a and 17b (FIG. 3) fixed to the left and right ends. On the other hand, a vertical groove n1 for detaching the support tube 6 is formed at positions where the left and right upright partition plates 2a and 2b (FIG. 1) are mounted, and the fixed support tube 6 is provided in the vertical direction. The coupling flange members 17a and 17b are arranged through the grooves n1 and n1, and are fixed to the corresponding upright partition plates 2a and 2b with bolts. Disks 18 a and 18 b are fitted on the fixed support pipe 6 on the inner surfaces of the upright partition plates 2 a and 2 b. The through hole d2 of the upright partition plate 2b and the through hole d4 of the disc 18b are in communication with each other. Each of the tongue-like portions h21, h21 of the left and right annular elastic members h2, h2 is in contact with an annular portion on the radially outer side of the inner side surface of the corresponding disk 18a, 18b with appropriate pressure, The liquid to be processed stored in 1A is sealed.

  The fixed support pipe 6 is provided with two liquid jet nozzles 19a and 19b in the middle of its length, and the purified liquid stored in the side section 1B is supplied to the left end opening 6a via liquid supply means (not shown). ing. The right end of the fixed support tube 6 is in a closed state, and the liquid supplied inward is sprayed from the two liquid spray nozzles 19 a and 19 b and sprayed onto the inner surface of the filter surface member 8.

  A workpiece input region p <b> 1 is set in a range on the front side of the drum filter device 5 in the section 1 </ b> A. The solid matter mixed in the liquid to be processed input into the object input region p1 falls to the front side of the rectangular container 1 by the solid material transfer means on the horizontal bottom surface in the section 1A and the inclined guide path 4.

  The solid material conveying means is provided with a pair of guide sprockets 21 and 21 fixed to a horizontal rotating shaft 20 rotatably supported at the left and right positions on the foremost side in the section 1A, and the foremost side in the inclined guide path 4 Drive sprockets 23, 23 fixed to a horizontal drive shaft 22 rotatably supported also at the left and right portions of the left and right sides, and endless chains 24 are hung around the guide sprockets 21 and the drive sprockets 23 on the left and right sides. The scraper plate 27 is fixed to the endless chains 24, 24 at a constant pitch in the front-rear direction. Chain guide members 25, 26 are fixed to the bent portions of the endless chains 24, 24 via the upright partition plates 2 a, 2 b, and the endless chains 24, 24 are guided to the upper surface side of the drum filter device 5. doing. Of the upper part of the endless chain 24 guided to the upper surface side of the drum filter device 5, the right endless chain 24 meshes with the upper part of the sprocket member 9 b, and the left endless chain 24 is connected to the drum filter device 5. It slides on the disk-shaped member 9a.

When the drive sprockets 23 and 23 are rotationally driven by a drive device (not shown), the underlayers of the endless chains 24 and 24 are moved forward, and the scraping plate 27 is moved in the same body as the endless chains 24 and 24. At the same time, the drum filter device 5 is rotated in a fixed direction around the fixed support tube 6 in conjunction with the endless chain 24 on the right side. Therefore, when the solid matter is put into the workpiece input region p1 and accumulated to a certain extent, the scraping plate 27 scrapes and moves it on the horizontal bottom surface and the inclined guide path 4 so as to drop from the outlet 3a. Function.
Although not shown in FIG. 1, a cover plate is provided between the upper edges of the left and right upright partition plates 2a and 2b.

  The filtration separation / extraction apparatus described above is useful when used for processing a suspension made of chips and coolant (water or cutting oil) discharged from a machining center or the like. In this use, chips and coolant are charged into the workpiece input region p1, and thereby, relatively high-density chips are continuously deposited on the bottom surface of the workpiece input region p1, The suspension in which the coolant and fine chips are mixed is stored in the entire area excluding the inside of the drum filter device 5 in the section 1A.

  On the other hand, the drive sprockets 23 and 23 are driven to rotate, whereby the scraping plate 27 scrapes and moves the chips accumulated in the section 1A on the bottom surface in the section 1A and on the inclined guide path 4. The drum filter device 5 is rotated around the fixed support tube 6 while being dropped to the front outside of the container 1.

  The drum filter device 5 transmits the suspension in the section 1 </ b> A to the inner side of the filter surface member 8 through the effective filtration surface 8 i of the filter surface member 8 while being rotated. As a result, the chips in the suspension are removed so as to adhere to the outer surface side of the filter surface member 8, and the purified coolant flows into the filter surface member 8. The purified coolant thus flowed into the side compartments 1B, 1C without the suspension in the compartment 1A through the through holes of the side member 7b, the through holes d4 of the circular plate 18b, and the through holes d2 of the upright partition plate 2b. It flows in and is stored.

  The purification coolant stored in the sections 1B and 1C is supplied again to the machining center and used. On the other hand, the liquid is supplied into the fixed support pipe 6 through a liquid feeding means (not shown) and is ejected from the two liquid ejection nozzles 19a and 19b. The purifying coolant sprayed from the liquid spray nozzles 19a and 19b is continuously blown against the inner surface of the filter surface member 8 of the drum filter device 5 that is driven to rotate. Thereby, the effective filtration surface 8i of the filter surface member 8 is back-washed in the state which is not immersed in suspension within the division 1A, and the clogging thing is removed effectively. Therefore, the drum filter device 5 exhibits the planned filtering ability over a long period of time without performing artificial cleaning.

Next, features of the above embodiment will be described.
a: Both ends of the single filter surface member 8 that are fitted in substantially the entire length range of the annular fitting grooves g5 and g5 on the outer peripheral edges of the pair of left and right side surface members 7a and 7b and opposed in the longitudinal direction j2 of the filter surface member 8 In the configuration in which the flange portions 8e and 8f provided on the edges 8c and 8d are coupled together with the elastic packing 15 sandwiched therebetween, a relatively wide effective filtering surface 8i can be formed on the outer peripheral surface portion of the drum filter device 5. Even if manufacturing errors occur in the overall length of the side surface members 7a and 7b of the annular fitting grooves g5 and g5 and the dimension in the longitudinal direction j2 of the filter surface member 8, elastic packing can be performed. By adjusting the thickness of 15, the filter face member 8 can be mounted in the annular fitting grooves g5 and g5 without impairing the sealing performance.

  b: A single elastic packing 15 having an L shape in side view is sandwiched between the first surface portions k6 and k10 of the male and female flange portions 8e and 8f and between the second surface portions k4 and k8. In the state where the filter surface member 8 is engaged with the annular fitting grooves g5, g5 on the outer peripheral edges of the left and right side members 7a, 7b, the side members 7a around the flange portions 8e, 8f of the filter surface member 8 are used. 7b can ensure the sealing performance in the circumferential direction and the radial direction, and can prevent harmful liquid leakage between the inside and outside of the drum filter device 5 with the filter surface member 8 as a boundary.

  c: A configuration in which elastically deformable protrusions k3 that are press-contacted to the inner surfaces of the annular fitting grooves g5 and g5 are provided at the respective full length portions of both end edges 8a and 8b facing each other in the width direction j1 of the filter surface member 8. It is possible to ensure the sealing performance of the fitting portions between the outer edges of the end edges 8a, 8b and the side members 7a, 7b.

  d: The presence of the beam portion 8h in the longitudinal direction j2 and the beam portion 8g in the width direction j1 of the filter surface member 8 increases the rigidity of the filter surface member 8, and the filter surface member 8 flutters during use of the drum filter device 5. Can be suppressed. At this time, the height of the beam portions 8g and 8h is gradually reduced in an arc shape toward the outside of the width so that there is no discontinuity in the shape where the beam portions 8g and 8h and the effective filtration surface 8i are joined. 8h and the effective filtering surface 8i are joined so as not to cause a steep step, and an arc surface is formed so that a discontinuous point of the shape is not formed at the intersection of the beam portion 8h in the longitudinal direction j2 and the beam portion 8g in the width direction j2. 8j is preferably coupled to each other, so that the joint portion between the beam portions 8g and 8h and the effective filtration surface 8i and the cross portion between the beam portions 8g and 8h effectively prevent fatigue failure due to vibration during use. It is suppressed.

  e: A configuration in which the radially outer wall surfaces of the annular fitting grooves g5 and g5 on the outer peripheral edges of the side members 7a and 7b are formed by fixing a plurality of arc-shaped strips g3 with screw members g4 is a drum filter device. Even if 5 is at an arbitrary position around the fixed support tube 6, one circular strip g3 can be removed without greatly rotating the drum filter device 5, and under this condition, the used filter surface By pulling out the member 8 and sliding the filter surface member 8 to be used next into the left and right annular fitting grooves g5 and g5 opened in the circumferential direction of the side members 7a and 7b, etc. The surface member 8 can be easily and quickly replaced.

  f: The used filter surface member 8 of the drum filter device 5 can be easily replaced without removing the liquid to be processed in the compartment. Making the liquid to be treated as it is improves the operating rate of the apparatus markedly. In addition, since the filter surface member 8 to be used next is pulled and moved by the used filter surface member 8, the filter surface member 8 to be used next has the left and right annular fitting grooves g5 and g5 as compared with the case of pushing operation. It will fit smoothly inside.

  In the above-described embodiment, the drum filter device 5 is used for filtration and separation of suspensions composed of chips and coolants, but is not limited to this, and may be used for filtration and separation of various suspensions. Is.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. It is a perspective view of the drum filter device. It is sectional drawing of the said drum filter apparatus. It is a side view which shows the sprocket member of the said drum filter apparatus. It is sectional drawing which shows the annular member periphery of the said drum filter apparatus. The filter surface member of the said drum filter apparatus is shown, A is a top view, B is a side view, C is a front view. Each part of the said filter surface member is shown, A is sectional drawing of the XX part of FIG. 6, B is sectional drawing of the flange part of a male side, C is sectional drawing of the flange part of a female side. It is a perspective view which shows the outer surface of the said filter surface member. It is side view explanatory drawing which shows the state which wound the filter surface member around the outer periphery of the side member of the said drum filter apparatus. It is sectional drawing which shows the state which couple | bonded the male and female flange part of the said drum filter apparatus. It is side view explanatory drawing which shows a mode that the filter surface member of a drum filter apparatus is replaced | exchanged. It is a figure which shows another filter surface member.

Explanation of symbols

7a Side member 7b Side member 8 Filter surface member 8a Edges opposed in the width direction 8b Edges opposed in the width direction 8c Edges opposed in the longitudinal direction 8d Edges opposed in the longitudinal direction 8e Flange part 8f Flange part 15 Interval Adjustment member (elastic packing)
16 clip member g5 annular fitting groove j1 width direction j2 longitudinal direction k3 projection piece k4 second surface portion k6 first surface portion k8 second surface portion k10 first surface portion

Claims (5)

Comprising a side member opposite at a certain distance, the total length of the the annular fitting groove formed in the outer peripheral edge of each side member, in the width direction vs. direction the opposite edges of the bendable filter surface member A pair of flanges that are slidably and densely fitted to each other and that protrude in the radial direction of the side member at the opposite ends in the longitudinal direction of the filter face member thus fitted. Each flange portion includes a first surface portion along the radial direction and the width direction, and a second surface portion along the outer peripheral edge and the width direction, and between the first surface portions of the flange portions. A drum filter device characterized in that a clip member is externally fitted so as to straddle the pair of flange portions in a state in which packing is densely interposed between the space and between the second surface portions. The circumferential position of the wall portion on the radially outer side of the annular fitting groove of each side member is partially removable, and the filter surface member is in a state where the removal portion is detached from the side member. The drum filter device according to claim 1, wherein an opening in the circumferential direction of the annular fitting groove is exposed. The drum according to claim 1 or 2, wherein an elastic protrusion piece pressed against the inner surface of the annular fitting groove is provided at substantially the entire length portion of both end edges facing in the width direction of the filter surface member. Filter device. 3. A used filter that is already fitted in the annular fitting groove with the partially removable circumferential position removed when the filter surface member in the drum filter device according to claim 2 is replaced. Either one of the flange members of the surface member and one flange portion of the flange portion of the filter surface member to be used next that has a male-female relationship are directly opposed via the clip member. A filter surface member replacement method in a drum filter device, wherein the used filter surface member is pulled out along the longitudinal direction from the annular fitting groove. 3. The drum filter device according to claim 2, wherein the part of the circumferentially removable part is removed, and is fitted in the annular fitting groove of each side member. After pulling out the finished filter face member in the longitudinal direction, the opposite end edges of the filter face member to be used next in the width direction are fitted so as to slide into the corresponding annular fitting grooves. A method for replacing a filter surface member in a drum filter device, characterized in that:

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