JP5271883B2 - Filtration device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filtration device of which usability by a worker is easily improved. <P>SOLUTION: The filtration device includes a bag-like filter 2 formed to be freely retractable by knitting a stretchable yarn, a filter storage body 3 having meshes and formed into a cylindrical form, and a case body 4 having a flow-in port 11 and a flow-out port 12. The case body 4 is composed of mainly a cylindrical inner case 13 formed to have a larger diameter and longer length than those of the filter storage body 3 by using a transparent resin, an outer case 14 formed into a bottomed cylindrical shape as a whole for storing the inner case 13, and an upper cover 15 attached to the upper end of the outer case 14 for covering the aperture of the outer case 14 in a freely detachable manner. The flow-out port 12 is formed in the bottom part of the outer case 14 and the flow-in port 11 is formed in the upper cover 15. A filter installation means 39 for installing the bag-like filter 2 is formed in the upper cover 15. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a filtration apparatus suitable for separating a solid contained in a liquid to be filtered by a bag-like filter.

  2. Description of the Related Art Conventionally, an industrial filtration apparatus that separates a solid contained in a liquid to be filtered using a bag-like filter is known. This filtration device is, for example, a coolant, a cutting fluid contained in a filtration target liquid such as a coolant, a cutting oil, a grinding fluid, or a cleaning fluid that is used for cooling, lubrication, cleaning, or the like in a machine tool. It is used to separate a solid having a predetermined size or more made of the processed powder (see, for example, Patent Document 1).

  FIG. 13 shows a conventional filtration device, and the conventional filtration device 101 includes a case main body 102 formed in a bottomed cylindrical shape having an upper portion opened by a metal such as stainless steel. Inside the case main body 102, a basket 103 formed of a wire mesh is disposed. Inside the basket 103, a bag-like filter 104 (bag filter) formed of polyester, polypropylene, or the like as a filter medium is provided. Contained. Further, an upper lid 105 that closes the opening of the case main body 102 is detachably attached to the opening end of the case main body 102 by a mounting bolt (not shown). An inlet 106 that communicates the inside and outside of the upper lid 105 is provided at the center of the upper lid 105 of the case body 102, and a flow that communicates the inside and outside of the case body 102 is provided at the center of the bottom of the case body 102. An outlet 107 is provided. In addition, two pressure gauges (not shown) are provided outside the case main body 102, and the hydraulic pressure before and after passing through the bag-shaped filter 104, that is, the liquid to be filtered before being filtered by the bag-shaped filter 104. The pressure and the pressure of the filtrate that is the filtered liquid after passing through the bag-like filter 104 can be detected.

  According to the filtration device 101 having such a configuration, the liquid to be filtered is supplied into the case main body 102 via the inlet 106 by pumping from a predetermined location. When the filtration target liquid supplied to the inside of the case main body 102 passes through the bag-like filter 104 from the inside to the outside, solids of a predetermined size or more contained in the filtration target liquid are separated. And the filtrate after filtering is discharged | emitted from the outflow port 107, and is sent to a predetermined location.

  In addition, when the conventional filtration apparatus 101 filters the filtration object liquid, the filter cake which is the solid isolate | separated inside the bag-like filter 104 will accumulate, and will be clogged. Therefore, when the bag-like filter 104 is clogged and cannot perform its filtering function, the bag-like filter 104 is replaced. The replacement time of the bag-like filter 104 is performed when the operator recognizes the pressure difference between the two pressure gauges that detect the hydraulic pressure before and after the bag-like filter 104.

JP 2003-154213 A

  By the way, in recent years, as the filtering device 101, the operator can surely and easily recognize the replacement time of the bag-like filter 104, and the operator can easily attach and detach the bag-like filter 104. There is a need for improvement in usability by consumers.

  Moreover, as the bag-like filter 104 used for the filtration device 101, the life (usable time) that is a period until clogging is longer than that of the conventional one, that is, the clogging is reduced, the replacement frequency is low, and There is a need for low-cost ones.

  This invention is made | formed in view of such a point, and it aims at providing the filtration apparatus which can aim at the improvement of the usability by an operator easily.

In order to achieve the above-mentioned object, the filtering device according to the first aspect of the present invention is characterized in that a bag-like filter for separating a solid contained in the liquid to be filtered and the bag-like filter are accommodated. A filter housing body that is formed in a cylindrical shape with a mesh for carrying out, and after filtering the liquid to be filtered to the inside of the bag filter and the bag filter while housing the filter housing body The bag-like filter is formed by covering polyurethane elastic fibers or polyetherester elastic fiber yarns with synthetic fiber yarns. The case body is formed to be stretchable by knitting a stretchable yarn, and the case main body has a cylindrical inner case formed in a larger diameter and longer than the filter container by a transparent resin. Graphics and an outer case formed into a bottomed cylindrical shape for housing the inner case has a top cover removably attached to the upper end of the outer casing to cover the opening of the outer casing the outlet is formed in the bottom of the outer casing, the inlet is formed in the upper lid, the upper lid, and the filter mounting means is provided for mounting the bag-shaped filter The filter mounting means is formed in a cylindrical shape, one end surface of which is fixed to the upper lid, and the filter body is formed in a cylindrical shape, and the bag-like filter covers the one end surface on the outside of the opening end. A filter mounting member that is detachably mounted so as to be folded back, and a connecting means that detachably connects the filter mounting member to which the bag-shaped filter is mounted and the mounting body. The filter mounting member is formed on a cylindrical base formed smaller than the outer diameter of the mounting main body, and on one end side of the outer peripheral surface of the cylindrical base, and the outer diameter is the same as the outer diameter of the mounting main body. An annular flange portion formed on the other end side of the outer peripheral surface of the cylindrical base body, and an annular groove for mounting to which the opening end portion of the bag-like filter is attached, and the connecting means A plurality of locking bodies projecting radially outward from the outer peripheral surface of the mounting body, an outer diameter of the mounting body, and a bag-like filter in a filter mounting state in which the bag-like filter is attached A cylindrical connection base formed to have a diameter larger than the outer diameter of the annular flange, an annular inner flange formed to extend toward the center in the radial direction at the other end of the inner hole of the connection base, and the connection It is formed from one end surface to the other end surface of the base, and the inside and outside where the locking body can be inserted A first insertion groove that penetrates in the radial direction and a circumferential direction of the connection base from the bottom of the first insertion groove, and penetrates the inside and outside of the plurality of locking bodies in the radial direction. A connecting cylinder member having a plurality of locking grooves formed of second insertion grooves, and when the filter mounting member in the filter mounting state is connected to the mounting body by the connecting means, the locking The second insertion groove is locked to the body, and the bag-shaped filter is formed between the opposed surfaces of the mounting body and the filter mounting member, and between the annular flange and the annular inner flange. It is in the point formed so that it may be hold | suppressed by each between the opposing surfaces which oppose .

And by employ | adopting such a structure, the bag-shaped filter can isolate | separate the solid more than the predetermined | prescribed magnitude | size contained in the filtration object liquid by the stitch. In addition, the bag-like filter is formed to be stretchable by knitting a stretchable yarn in which a polyurethane elastic fiber or a polyetherester elastic fiber is covered with a synthetic fiber yarn, so that the mesh is formed by the solid contained in the liquid to be filtered. Can be prevented from occurring in a short time, and even when the bag-like filter is clogged by the separated solid filter cake, it provides a stable filtration function over a long period of time. can do. That is, as the clogging of the bag-shaped filter progresses, the bag-shaped filter expands, so that the stitches of the bag-shaped filter can be expanded to reduce the filtration function and the flow rate. Furthermore, even when the stitches of the bag-shaped filter are enlarged, the filter mass accumulated inside the bag-shaped filter functions as a filter, so that the initial filtering function as a whole can be maintained over a long period of time. . Further, since the solid contained in the liquid to be filtered is clogged and accumulated in order from the tip side inside the bag-shaped filter, the bag-shaped filter expands and spreads in the radial direction as the bag-shaped filter clogs. The stitches can be expanded to reduce the reduction in filtration function and flow rate, and even if clogging occurs on the front side of the bag-like filter, the filtration function is provided by the unclogged opening side of the bag-like filter. Therefore, the initial filtration function as a whole can be maintained over a long period of time. Therefore, the lifetime of the bag-like filter can be extended as compared with the conventional one. Moreover, the inflow port formed in the upper lid can smoothly and surely flow the liquid to be filtered into the bag-like filter. Furthermore, the outlet formed at the bottom of the outer case can smoothly and reliably flow out the filtrate that has passed through the bag-like filter. Furthermore, the filter attachment member can easily attach and detach the bag-like filter. Further, the connecting means can detachably connect the filter mounting member in the filter mounting state to the mounting body, and thus to the upper lid. Further, the connecting means is configured such that when the filter mounting member in the filter mounting state is connected to the mounting body, the second insertion groove is locked to the locking body, and the mounting body and the filter mounting member are opposed to each other. And the bag-shaped filter can be securely fixed to each other between the opposed surfaces of the annular collar portion and the annular inner collar portion facing each other. The shape of the filter can be facilitated easily. Therefore, it is possible to easily improve the usability for the operator.

According to a second aspect of the present invention, there is provided a filtering device according to the first aspect, wherein the bag-shaped filter is press-contacted to at least one of opposing surfaces of the mounting body and the filter mounting member. Is in the point provided. And by employ | adopting such a structure, the press-contact member can hold down a bag-shaped filter more reliably to a filter attachment means.

According to a third aspect of the present invention, the filter device of the present invention is characterized in that in the first or second aspect , the other end of the filter mounting member is inserted into the opening of the filter container. It is in. By adopting such a configuration, a load is not applied to the filter housing body from the filter mounting member, and it is not necessary to individually position the filter mounting member with respect to the filter housing body.

According to a fourth aspect of the present invention, there is provided a filter device according to any one of the first to third aspects, wherein the outer case has lower ends of the filter housing body and the inner case from below. A bottom member formed in a bottomed cylindrical shape having an open top for supporting, an upper member formed in a cylindrical shape for supporting the outer periphery of one end of the inner case from the radially outer side, and A connecting member for connecting the bottom member and the upper member at a predetermined interval; a positioning pipe is fixed to the outer peripheral surface of the upper member; Are formed so that two notch grooves opened at the top face each other, and an upper portion of a positioning rod that is detachably inserted into the positioning pipe is fixed to the outer peripheral surface of the upper lid. And this positioning A pin hole penetrating in the radial direction perpendicular to the axial direction of the positioning rod is formed at an upper position of the same length as the positioning pipe from the lower end of the rod, When the upper lid is removed from the outer case, a cylindrical set pin formed with a diameter smaller than the inner diameter of the pin hole is formed to be detachable so that both ends protrude from the pin hole. is there. And by adopting such a configuration, by inserting the positioning rod into the positioning pipe, the rotation stop along the circumferential direction of the upper lid with respect to the outer case, and the rotation direction along the circumferential direction of the upper lid of the outer case 14 When the top cover is removed from the outer case, the set pin is attached to the pin hole of the positioning rod and then the set pin is placed in the notch groove from above to remove the top cover. Since the state located above the opening of the case can be maintained, both hands of the operator are freed.

According to a fifth aspect of the present invention, there is provided a filter device according to any one of the first to fourth aspects, wherein the mesh of the filter container is accommodated inside the filter container. It is formed in a mesh that allows the filter to be seen from the outside, and a peep window that communicates the inside and outside of the bag-like filter through which the bag can be seen from the outside through the inner case is formed in the body of the outer case. . And by adopting such a configuration, the bag-like filter can be visually recognized from the outside, that is, the bag-like filter can be easily visualized by the observation window, so that the bag-like filter is easily clogged. I understand. As a result, it is possible to easily recognize the replacement time of the bag-shaped filter by a simple operation in which the operator visually recognizes the degree of clogging of the bag-shaped filter.

According to a sixth aspect of the present invention, there is provided a filter device according to any one of the first to fifth aspects, wherein the liquid to be filtered is a coolant that is circulated and used in a coolant supply device of a machine tool. It is in. And by having employ | adopted such a structure, the processing powder contained in a coolant can be isolate | separated.

According to the filtration device concerning the present invention, the solid contained in the filtration object liquid can be easily separated by the bag-like filter. Further, the bag-like filter made form telescopically by weaving stretchable yarns and covering yarn of synthetic fiber yarn of the polyurethane elastic fibers or polyether ester elastic fibers, stitches by solids contained in the filtered target solution Can be prevented from occurring in a short time and expands as clogging progresses, so the stitches of the bag-like filter expand, reducing the filtration function and flow rate can do. As a result, the lifetime of the bag-like filter can be extended as compared with the conventional one. Further, the filter mounting means can securely attach the bag-like filter to the upper lid, and can prevent the bag-like filter from dropping from the upper lid during the operation of moving the upper lid when replacing the bag-like filter. The filter can be easily replaced. Therefore, there are excellent effects such as easy improvement of usability by the operator.

The disassembled perspective view which shows the principal part of embodiment of the filtration apparatus which concerns on this invention The front view which shows the principal part of embodiment of the filtration apparatus which concerns on this invention Cross section of FIG. Plan view of FIG. Bottom view of FIG. FIG. 2 is an enlarged sectional view showing the main part of FIG. The same figure as FIG. 6 which shows the state by which the locking pin of the connection means was inserted in the locking groove The expanded sectional view explaining the filter attachment state which attached the bag-like filter to the filter attachment member of the filter attachment process in the embodiment of the filtration device concerning the present invention The figure similar to FIG. 8 explaining the set state which set the connection cylinder member to the filter attachment member of the filter attachment state following FIG. 8 of the filter attachment process in embodiment of the filtration apparatus which concerns on this invention. 9 shows a ring mounting body in which a connecting tube member in a set shape in which a connecting tube member is set to a filter mounting member in a filter mounting state following FIG. Outline external view explaining the state of facing down The figure similar to FIG. 10 explaining the state which inserted the 1st insertion groove following FIG. 10 of the filter attachment process in embodiment of the filtration apparatus which concerns on this invention into the latching pin. The figure similar to FIG. 10 explaining the state which inserted the 2nd insertion groove 54b following FIG. 11 of the filter attachment process in embodiment of the filtration apparatus which concerns on this invention into the latching pin 45. FIG. Structure diagram showing an example of a filtration device provided with a conventional bag-like filter

  The present invention will be described below with reference to embodiments shown in the drawings.

  The filtration apparatus of this embodiment has illustrated the thing used for filtration of the coolant as a filtration object liquid circulated and used in the coolant supply apparatus of a machine tool. In this filtration device, the coolant stored in the coolant tank is supplied by being pumped inside the pipe by a pump. Then, in the filtration device, the processing powder such as the cutting powder as a solid contained in the coolant is captured by the bag filter as the filter medium, and the coolant from which the cutting powder as the filtered filtrate is removed returns to the coolant tank. It has become.

  As shown in FIG. 1 to FIG. 3, the filtration device 1 of the present embodiment includes a bag-like filter 2 as a filter medium for separating processed powder such as cutting powder as a solid contained in a coolant as a liquid to be filtered. A filter housing 3 for housing the bag-like filter 2 and a case main body 4 for housing the filter housing 3 are provided.

  The bag-like filter 2 is formed to be stretchable by stretchable yarn. This stretchable yarn is used for elastic socks, elastic stockings and the like, and is formed by combining elastic fibers (elastomer fibers) with synthetic fibers.

  For example, a single cover that covers polyurethane elastic fiber (spandex) as an elastic fiber with high multi-type (one filament is thinner than 1.45 denier) of synthetic fiber such as polyamide (nylon), polyester, etc. Mention may be made of ring yarns (SCY20 WN 70/48). Alternatively, it may be a double covering yarn (DCY) in which polyurethane synthetic fibers are covered with two synthetic fiber threads. A polyether ester elastic fiber may be used instead of the polyurethane elastic fiber. Further, by covering the polyurethane elastic fiber yarn with the synthetic fiber yarn, breakage or damage of the stitches by the processing powder can be prevented in a short time.

  The elastic yarn is formed into a bag-like knitted fabric by a high gauge circular knitting machine (4 inches: 400 needles) which is a sock knitting machine, and a bag-like filter 2 is formed by the knitted fabric. The knitted fabric is knitted with Akasa (plain fabric) knitting, needle knitting or the like alone or in combination.

  The length of the bag-like filter 2 in the free state is about 4/5 of the length of the filter housing 3. The bag-like filter 2 is used in a state of being attached to a filter attachment member 42 described in detail later (FIGS. 6 and 7). In addition, what is necessary is just to set the length in the free state of the bag-shaped filter 2 as needed, such as a design concept. However, it is preferable to make it shorter than the length of the filter housing 3.

  The filter housing 3 is formed in a cylindrical shape having a mesh with resin. For example, the mesh of the filter housing 3 is formed with a wire diameter of about 1 mm and a pitch of about 10-20 mm. In addition, as a shape of the filter container 3, what is necessary is just a cylindrical shape as a whole. For example, the cross section may be a square tube or a polygonal square tube. Further, the filter housing 3 may be formed in a bottomed cylindrical shape having an open top. Furthermore, as the mesh of the filter housing 3, it is important to use a mesh that allows the bag-like filter 2 housed inside the filter housing 3 to be viewed from the outside. Furthermore, even if the filter container 3 is integrally formed of a resin, the two opposite sides of the mesh plate formed in a rectangular flat plate shape are fixed by fusion or adhesion to form a cylindrical shape. Even if it is what was made, two opposite sides of the mesh board formed in the shape of a rectangular flat plate may be combined with fasteners, such as a string.

  As shown in FIG. 3, the case body 4 includes an inlet 11 for introducing coolant into the bag-like filter 2, and a coolant after filtering the coolant filtered by the bag-like filter 2, that is, the processing powder contained in the coolant. And an outlet 12 that flows out to the outside. As shown in FIGS. 1 to 3, the case body 4 of the present embodiment includes an inner case 13 for forming a filtrate flow path, an outer case 14 for housing the inner case 13, An upper lid 15 for covering the opening of the outer case 14 is provided.

  The inner case 13 is made of a transparent resin such as a transparent acrylic resin (acrylic ester resin, methacrylic ester resin), a transparent polycarbonate resin, or a transparent ABS resin (acrylonitrile / butadiene / styrene). It is formed in a larger diameter cylindrical shape. A gap is formed between the inner peripheral surface of the inner case 13 and the outer peripheral surface of the filter housing 3 as a flow path for allowing the filtrate to flow easily. Further, the length of the inner case 13 is formed longer than the length of the filter housing 3. Note that the inner case 13 may have a cylindrical shape. For example, the cross section may be a square tube or a polygonal square tube.

  As shown in FIGS. 1 and 2, a mark 16 is provided on the outer peripheral surface of the inner case 13 as a mark for recognizing the replacement time of the bag-like filter 2. The mark 16 extends along the circumferential direction, for example, above the central portion of the inner case 13 in the length direction, specifically, at a height position of about 2/3 of the entire length from the lower end of the outer peripheral surface of the inner case 13. The red tape is provided in a ring shape.

  As shown in FIGS. 1 to 3, the outer case 14 includes a bottom member 17, an upper member 18, and a connection member 19.

  The bottom member 17 is for supporting the lower ends of the filter housing 3 and the inner case 13 from below. The bottom member 17 is made of a metal plate so as to close the outer bottom barrel 20 formed of a metal in a cylindrical shape larger in diameter than the outer diameter of the inner case 13 and the lower end opening of the outer bottom barrel 20. The outer bottom plate 21 formed in a shape is formed into a bottomed cylindrical shape having an open top as a whole. Further, as shown in FIG. 5, the outer bottom plate 21 has a plurality of outflow through holes 12 a as outlets 12 through which the filtrate that has passed through the bag-like filter 2 from the inside to the outside flows out. Is formed. That is, an outlet 12 for allowing the filtrate that has passed through the bag-like filter 2 from the inside to the outside to flow out is formed at the bottom of the outer case 14. As the outer bottom plate 21, it is not necessary to individually form a plurality of outflow through holes 12 a because punching metal which is a metal plate provided with a large number of holes penetrating in the thickness direction in advance is used. It is preferable in the sense that the cost can be easily increased.

  As shown in FIG. 3, the upper surface of the outer bottom plate 21 shown in FIG. 3 above, that is, the outer peripheral portion of the bottom surface of the bottom member 17, is formed in a flat plate shape for elastically supporting the lower end portion of the inner case 13 from below. Eight sponge pieces 22 (only two sponge pieces 22 are shown in FIG. 3) as a plurality of foams are fixed by an adhesive, a double-sided tape or the like. These eight sponge pieces 22 are arranged at an equal angle so that the distance between the two sponge pieces 22 adjacent to each other at the equidistant position from the center of the outer bottom plate 21 is substantially equal. These sponge pieces 22 are made of an elastomer such as rubber or resin, and also function as a detent that prevents the inner case 13 from rotating in the circumferential direction. Instead of the eight sponge pieces 22, a sponge formed in an annular flat plate shape may be used.

  A mounting wall 23 is provided on the upper surface of the outer bottom plate 21 for mounting and positioning the lower end of the filter housing 3. The mounting wall 23 in the present embodiment is formed in a cylindrical shape so as to surround the outer peripheral surface of the lower end portion of the filter housing 3, and the upper end surface thereof is disposed below the opening end of the outer bottom body portion 20. Yes. Moreover, the inner hole of the mounting wall 23 is formed larger in diameter than the outer diameter of the filter housing 3 so that the lower end of the filter housing 3 can be detachably mounted. Each sponge piece 22 is disposed outside the mounting wall 23 on the upper surface of the outer bottom plate 21.

  In addition, what is necessary is just to set the shape of the mounting wall 23 according to the shape of the filter container 3, and is not limited to a cylindrical shape. For example, it may be partially provided so as to form an annular shape as a whole so as to surround the outer peripheral surface of the lower end portion of the filter container 3, and three or more columnar protrusions may be provided on the outer bottom plate. A configuration may be adopted in which the two columnar protrusions adjacent to each other at an equidistant position from the center of 21 are arranged at equal angles so that the distance between them is equal.

  As shown in FIGS. 1 to 3, an annular mounting flange 24 is provided at a substantially central portion in the vertical direction, which is the length direction of the outer peripheral surface of the outer bottom barrel portion 20. The mounting flange 24 is fixed to a predetermined position on the outer peripheral surface of the outer bottom body 20 by welding. A plurality of attachment holes 25 for attaching the filtration device 1 to an attachment object such as an attachment plate or an attachment stand (not shown) are formed at predetermined positions of the attachment flange 24. As shown in FIG. 5, these mounting holes 25 are arranged so that the distance between the centers of the two mounting holes 25 adjacent to each other at the equidistant position from the outer bottom barrel 20, and hence the axis of the outer case 14, is equal. Angular arrangement.

  The upper member 18 is for supporting the outer periphery of the upper end portion of the inner case 13 from the radially outer side. As shown in FIGS. 1 to 3, the upper member 18 is formed of a metal in a cylindrical shape. Each of the outer diameter and inner diameter of the upper member 18 is formed to be the same as the outer diameter and inner diameter of the outer bottom barrel portion 20, and the inner hole of the upper member 18 is larger than the outer diameter of the inner case 13. It is formed in the diameter. That is, as the material for the upper member 18 and the outer bottom body portion 20, metal tubes of the same size are used. Further, as shown in FIG. 3, the upper end surface of the upper member 18 is formed to be slightly above the upper end surface of the inner case 13 when the inner case 13 is attached to the outer case 14.

  As shown in FIGS. 1 to 3, a positioning pipe 26 made of metal is provided on the outer peripheral surface of the upper member 18. The positioning pipe 26 is arranged so that its longitudinal direction extends in parallel with the longitudinal direction of the upper member 18. The positioning pipe 26 of the present embodiment is fixed to the outer peripheral surface of the upper member 18 by welding.

  As shown in FIG. 3, the upper end surface of the positioning pipe 26 is disposed below the upper end surface of the upper member 18, and the lower end surface of the positioning pipe 26 is substantially flush with the lower end surface of the upper member 18. Has been. Further, two U-shaped notch grooves 27 having an open top are formed at the upper end of the positioning pipe 26 so as to face each other. Further, the two notch grooves 27 are arranged symmetrically with respect to the axis of the positioning pipe 26.

  The connecting member 19 is for connecting the bottom member 17 and the upper member 18 with a predetermined interval. The connecting member 19 is formed of a metal in a square bar shape having a rectangular cross section, and as shown in FIGS. 1 and 2, the lower end portion is fixed to the upper end portion side of the outer peripheral surface of the outer bottom barrel portion 20 by welding or the like. The upper end portion is fixed to the lower end portion side of the outer peripheral surface of the upper member 18 by welding or the like. That is, the connecting member 19 is arranged in parallel with the longitudinal direction along the axis of the outer case 14.

  In the present embodiment, six connection members 19 are used so as to extend in parallel to each other. These six connecting members 19 are arranged at equal angles with a distance so that the distances between the two connecting members 19 adjacent to each other at the equidistant position from the axis of the outer case 14 are equal. The connecting member 19 may be a round bar. Further, the connecting member 19 may be a cylinder provided with a plurality of holes penetrating the inside and outside in the radial direction (thickness direction). In this case, it is important to set the size of the hole so that the inside can be easily visually recognized.

  As shown in FIG. 2, a portion where the connecting member 19 is not disposed between the bottom member 17 and the upper member 18 of the outer case 14 is a communication space that communicates the inside and the outside. Thus, a peep window 28 is formed through which the bag-like filter 2 can be visually recognized from the outside through the inner case 13 in the present embodiment. That is, a peep window 28 is provided in the body portion of the outer case 14 so as to communicate the inside and the outside where the bag-like filter 2 can be visually recognized from the outside through the transparent inner case 13. Of course, the outside is the outside of the filtration device 1. Therefore, the observation window 28 can easily visualize the bag-like filter 2.

  The upper lid 15 is for covering the opening of the outer case 14. As shown in detail in FIGS. 6 and 7, the upper lid 15 is formed in an annular shape by a lid body portion 29 formed of a metal in a cylindrical shape and a metal plate that closes the opening at the upper end of the lid body portion 29. The lid top plate 30 is formed into a bottomed cylindrical shape having an open bottom as a whole. The inner hole of the lid body 29 is formed to have a larger diameter than the outer diameter of the upper member 18 so as to surround the upper end portion of the upper member 18 and consequently the outer peripheral surface of the upper end portion of the outer case 14. .

  In the center of the lid top plate 30, an inflow pipe 31 made of a socket or the like, which is a kind of pipe joint, is disposed along the vertical direction that is the thickness direction of the lid top plate 30. The inflow pipe 31 is formed longer than the length of the upper lid 15, and is arranged so that the upper end protrudes above the upper surface of the lid top plate 30 and the lower end protrudes below the lid top plate 30. The lower end surface of the inflow pipe 31 is formed substantially flush with the opening end surface of the lid body portion 29. In addition, the inflow pipe 31 is spaced from the outer side of the upper lid 15 by welding or the like with the central portion in the longitudinal direction on the outer peripheral surface thereof inserted into the pipe mounting hole 32 that is an inner hole provided at the center of the lid top plate 30. The opening at the upper end of the inflow pipe 31 serves as an inlet 11 that guides coolant into the bag-like filter 2. That is, the inflow port 11 for guiding the coolant to the inside of the bag-like filter 2 is formed in the central portion that is the axial center portion of the upper lid 15. Further, at least the upper end portion of the inner hole of the inflow pipe 31 is formed with a female screw 31a for use in connection with a supply pipe for coolant to be fed.

  The outer peripheral portion of the lower surface, which is the inner surface of the lid top plate 30, is formed to face the opening end surface of the outer case 14 with a slight gap. The outer peripheral portion of the lower surface of the lid top plate 30 may be formed so as to be in contact with the opening end surface of the outer case 14. Further, a gasket may be arranged between the lower surface of the lid top plate 30 and the opening end surface of the outer case 14. Furthermore, the shape of the lid body 29 may be a cylindrical shape. For example, the cross section may be a square tube or a polygonal square tube.

  A cylindrical inner wall 33 is provided on the lower surface of the lid top plate 30. The length of the inner wall 33 is longer than the axial length of the lid body 29, and the lower end surface of the inner wall 33 projects downward from the lower end surface of the lid body 29. Further, the inner hole of the inner wall 33 is formed to have a larger diameter than the outer diameter of the connecting cylinder member 51 described later, and the outer diameter of the inner wall 33 is formed to be smaller than the inner diameter of the inner case 13.

  The shape of the inner wall 33 is not limited to a cylindrical shape. For example, it may be partly provided so as to form an annular shape as a whole, or two columnar protrusions adjacent to each other at three or more columnar protrusion walls at the same distance from the center of the lid top plate 30. It is good also as a structure arrange | positioned at equal angles so that distance may become equal.

  As shown in FIGS. 1 to 3, an upper portion of a positioning rod 34 that is removably inserted into a positioning pipe 26 provided on the outer peripheral surface of the upper member 18 is fixed to the outer peripheral surface of the lid body 29 by welding. Has been. The upper end surface of the positioning bar 34 is formed flush with the upper surface of the lid top plate 30. Further, the length of the positioning rod 34 is formed to be about 7/10 of the length of the outer case 14. Then, by inserting the positioning rod 34 into the positioning pipe 26, at least rotation prevention along the circumferential direction of the upper lid 15 with respect to the outer case 14 and positioning in the rotation direction along the circumferential direction of the upper lid 15 with respect to the outer case 14 are performed. Has been made.

  A pin hole 34 a penetrating in a radial direction perpendicular to the axial direction of the positioning rod 34 is formed at an upper position about the same length as the positioning pipe 26 from the lower end of the positioning rod 34. When the upper lid 15 is removed from the outer case 14, a cylindrical set pin 35 formed with a diameter smaller than the inner diameter of the pin hole 34a is inserted into and removed from the pin hole 34a so that both ends protrude from the pin hole 34a. In other words, the pin 35 can be inserted into the pin hole 34a, or the pin 35 inserted into the pin hole 34a can be removed from the pin hole 34. In addition, the set pin 35 is attached to the pin hole 34 a of the positioning rod 34, and both end portions protruding from the outer periphery of the positioning rod 34 are formed by the bottoms of the two notch grooves 27 formed at the upper end of the positioning pipe 26. It can be supported from below.

  Therefore, when the upper lid 15 is removed from the outer case 14, the set pin 35 is attached to the pin hole 34 a of the positioning rod 34, and then the set pin 35 is placed in the notch groove 27 from above so that the upper lid 15 is removed. The state positioned above the opening of the case 14 can be maintained.

  One end of a chain 36 having a predetermined length is attached to one end of the set pin 35, and the other end of the chain 36 is attached to the upper part of the connection member 19 adjacent to the positioning pipe 26.

  As shown in FIG. 1 to FIG. 4, the upper lid 15 and the outer case 14 are detachably attached with a known catch clip 37 as a fastening member in one touch. That is, as is well known, one of the two catch clips 37, for example, an operation side member 37a provided with an engaging portion, a spring and an operation lever is attached to the outer peripheral surface of the upper member 18, On the outer peripheral surface of the lid body portion 29, the other side of the catch clip 37, for example, a receiving side member 37b provided with a hooking piece to be hooked on the hooking portion is attached.

  In the present embodiment, the operation side member 37 a of the catch clip 37 and the positioning pipe 26 are disposed on the outer peripheral surface of the upper member 18 so as to face each other with the axis of the upper member 18 as the center. Further, the receiving side member 37 b of the catch clip 37 and the positioning rod 34 are arranged on the outer peripheral surface of the lid body 29 so as to face each other about the axis of the lid body 29.

  The number of catch clips 37 may be two or more. In the case where such a plurality of sets of catch clips 37 are provided, it is preferable that the two catch clips 37 adjacent to each other at an equidistant position from the axis of the case body 4 are arranged at an equal angle so that the distance between the centers is equal. .

  Therefore, the upper lid 15 and the outer case 14 may be formed so as to be detachable with one touch by at least one catch clip 37. Of course, as the number of sets of catch clips 37 increases, the labor and time required for the operation increase.

  The upper lid 15 only needs to be detachably attached to the upper end of the outer case 14 in order to cover the opening of the outer case 14. Further, the upper lid 15 and the outer case 14 may be detachably attached with one touch by another configuration such as a one touch joint instead of the catch clip 37. The one-touch joint can be selected from various configurations such as a bayonet type, a clamp type, and a slide type as required according to the design concept.

  As shown in detail in FIGS. 6 and 7, the upper lid 15 is provided with a filter attachment means 39 for attaching the bag-like filter 2 to the upper lid 15.

  The filter mounting means 39 of the present embodiment includes a mounting body 41 fixed to the upper lid 15, and a filter mounting member in which an opening end portion as a bag mouth of the bag-like filter 2 that is disposed to face the mounting body 41 is detachably mounted. 42, and a connecting means 43 for detachably connecting the filter mounting member 42 and the mounting body 41 in the filter mounting state where the bag-like filter 2 is mounted.

  The mounting body 41 is formed in a cylindrical shape from a resin such as polypropylene or polyacetal, and the upper end surface of the mounting body 41 is aligned with the axis of the upper lid 15 by a bonding member such as an adhesive. It is fixed to the lower surface of the lid top plate 30. Further, the inner hole of the mounting main body 41 is a stepped hole in which a large diameter hole 41a disposed on the upper end side facing the lid top plate 30 and a small diameter hole 41b disposed on the lower end side are connected by a step portion 41c. It is said that. The inner diameter of the large-diameter hole 41a is larger than the outer diameter of the inflow pipe 31, and the length of the large-diameter hole 41a is that of a portion protruding downward from the bottom surface of the lid top plate 30 of the inflow pipe 31. A portion that is longer than the length and protrudes downward from the lower surface of the lid top plate 30 of the inflow pipe 31 is inserted into the large-diameter hole 41a. In addition, a metal cylinder 44 is attached to the small-diameter hole 41b for preventing wear caused by contact of machining powder contained in the coolant when the coolant passes downward through the small-diameter hole.

  The outer diameter of the mounting body 41 is smaller than the inner wall 33 of the upper lid 15. Further, the length of the mounting body 41 is such that the lower end surface of the mounting body 41 projects downward from the lower end, which is the tip of the inner wall 33 provided on the upper lid 15, and the upper member 18 constituting a part of the outer case 14. It is set to be lower than the upper end surface and higher than the upper opening end of the filter housing 3.

  In the vicinity of the lower end portion of the outer peripheral surface of the mounting body 41, two locking pins 45 formed in a columnar shape as a plurality of locking bodies projecting radially outward from the outer peripheral surface of the mounting body 41 are mounted. The main body 41 is provided symmetrically about the axis. The virtual outer diameter connecting the tips of these two locking pins 45 is smaller than the inner diameter of the inner wall 33 of the upper lid 15, so that the locking pins 45 do not interfere with the inner wall 33. Each of the locking pins 45 can be detachably inserted into a locking groove 54 provided in a connecting cylinder member 51 described later.

  Note that the number of the locking pins 45 may be three or more. Thus, when the number of the locking pins 45 is three or more, the equiangularity is such that the distance between the centers of the two locking pins 45 adjacent at the equidistant position from the axis of the mounting body 41 is equal. It is preferable to arrange. Further, the locking pin 45 may be cylindrical. Furthermore, the locking body is not limited to the locking pin 45, and may be a flat locking piece.

  In the vicinity of the outer periphery of the lower end surface of the mounting body 41, an O-ring 46 is disposed as a pressure contact member that presses the bag-shaped filter. The O-ring 46 is attached to an annular groove 47 formed on the lower end surface of the attachment main body 41.

  As the pressure contact member, a plurality of O-rings 46 having different sizes may be arranged concentrically. Further, the pressure contact member is not limited to the O-ring 46, and existing members such as a D ring, an X ring, and a square ring can be used. Further, as the pressure contact member, a configuration in which an annular projection is integrally provided on the lower end surface of the mounting body 41 or a configuration in which a plurality of projections are integrally provided on the lower end surface of the mounting body 41 can be adopted.

  The pressure contact member may be disposed on the upper end surface of the filter mounting member 42 described later.

  That is, the pressure contact member that presses the bag-like filter 2 may be provided on at least one of the opposing surfaces of the mounting body 41 and the filter mounting member 42 that face each other.

  The pressure contact member is disposed on both of the opposing surfaces of the mounting body 41 and the filter mounting member 42, that is, on each of the lower end surface of the mounting body 41 and the upper end surface of the filter mounting member 42. It is important to provide the pressure contact members at different positions so as not to face each other.

  Further, the pressure contact member is not necessarily provided, and may be provided according to the design concept or the like.

  The filter mounting member 42 is formed of a resin such as polypropylene or polyacetal. The filter mounting member 42 has a cylindrical base body 48 whose outer diameter is smaller than the outer diameter of the mounting body 41 and whose inner hole is formed larger in diameter than the inner hole of the metal tube 44 of the mounting body 41; The upper end portion of the outer peripheral surface of the cylindrical base 48 has an annular flange portion 49 made of an annular flat plate extending outward in the radial direction, and is formed in a cylindrical shape as a whole. The outer diameter of the annular flange 49 is substantially the same as the outer diameter of the mounting body 41. Further, an annular annular groove 50 for mounting the opening end of the bag-like filter 2 is formed in the circumferential direction in the vicinity of the lower end portion of the outer peripheral surface of the cylindrical base 48 of the filter mounting member 42. Further, the length of the filter mounting member 42 along the axial direction is set so that the lower end portion of the cylindrical base 48 is inserted into the upper opening of the filter housing 3.

  The filter attachment member 42 is detachably attached so that the opening end portion of the bag-like filter 2 is folded outward. In the filter attachment state where the bag-like filter 2 is attached, the annular shape of the filter attachment member 42 is provided. A flat upper end surface including the upper surface of the flange portion 49 is covered with the bag-like filter 2. In the filter mounting member 42, the upper end surface covered with the bag-like filter 2 in the filter mounting state is disposed opposite to the lower end surface of the mounting body 41. That is, the upper end surface of the filter attachment member 42 and the lower end surface of the attachment main body 41 are formed to face each other with the bag-like filter 2 interposed therebetween.

  A connecting cylinder member 51 formed of a resin such as polypropylene or polyacetal is disposed on the outer periphery of the mounting body 41. The connecting cylinder member 51 has an outer diameter smaller than the inner diameter of the inner wall 33, and the inner hole of the connecting cylinder member 51 includes the outer diameter of the mounting body 41 and the bag-like filter 2 in the filter mounting state. An outer diameter of the annular flange 49 of the filter mounting member 42, that is, a connection base 52 formed larger in diameter than both of the outer diameter of the annular flange 49 and the size obtained by adding twice the thickness of the bag-like filter 2; The lower end of the inner hole of the connection base 52 has an annular inner flange 53 made of an annular flat plate extending toward the radial center, and is formed in a cylindrical shape as a whole. Yes. The inner diameter of the annular inner flange 53 is such that the outer diameter of the cylindrical base 48 of the filter mounting member 42 including the bag-like filter 2 in the filter mounting state, the outer diameter of the annular flange 49, that is, the outer diameter of the cylindrical base 48. The diameter is larger than the size obtained by adding twice the thickness of the bag-like filter 2 to the diameter. Further, the upper surface of the annular inner collar portion 53 is disposed so as to face the lower surface of the annular collar portion 49 of the filter mounting member 42 with the bag-like filter 2 interposed therebetween.

  The connecting cylinder member 51 is formed with two locking grooves 54 into which the two locking pins 45 provided on the mounting body 41 can be inserted. These two locking grooves 54 are provided point-symmetrically about the axis of the connecting cylinder member 51. Each of the two locking grooves 54 includes a first insertion groove 54a that is formed downward from the upper end surface of the connection cylinder member 51 and penetrates radially inside and outside where the locking pin 45 can be inserted. The second insertion groove 54b is formed along the circumferential direction of the connecting tube member 51 from the bottom of the first insertion groove 54a and penetrates radially inside and outside where the locking pin 45 can be inserted.

  Note that the number of the locking grooves 54 may be three or more like the number of the locking pins 45. When the number of the locking grooves 54 is three or more as described above, the distance between the centers of the two locking grooves 54 adjacent to each other at the equidistant position from the axis of the connecting cylinder member 51 is equal. An angular arrangement is preferred.

  The filter mounting member in the filter mounting state in which the bag-like filter 2 of the present embodiment is mounted by the connecting cylinder member 51 having the two locking pins 45 and the two locking grooves 54 disposed on the mounting body 41. Connection means 43 is configured to detachably connect 42 and the mounting body 41.

  The connecting means 43 may be any means as long as it directly or indirectly removably connects the filter mounting member 42 with the bag-like filter 2 attached thereto and the mounting body 41. For example, the bag-like filter Various one-touch joints such as a bayonet type, a clamp type, and a slide type that can directly connect the filter mounting member 42 and the mounting body 41 to which the filter 2 is mounted can be used. .

  In this embodiment, the bag-like filter 2 in the connected state in which the filter attachment member 42 in the filter attachment state to which the bag-like filter 2 is attached and the attachment main body 41 are connected by the connecting means 43 is disposed on the lower end surface of the attachment main body 41. The O-ring 46 and the upper end surface of the filter mounting member 42 are pressed against each other and pressed.

  That is, the bag-shaped filter 2 is indirectly pressed between the lower end surface of the mounting body 41 and the upper end surface of the filter mounting member 42.

  It should be noted that, by increasing the depth of the annular groove 47 or lowering the hardness of the O-ring 46, the lower end surface of the mounting body 41 and the O-ring 46 may be pressed against the bag-like filter 2. Good.

  Further, in the case where the pressure contact member is not provided, the bag-like filter 2 is directly pressed and pressed between the opposed surfaces of the mounting body 41 and the filter mounting member 42.

  Next, the operation of the present embodiment having the above-described configuration will be described.

  For convenience of explanation, first, a method for attaching the bag-like filter 2 in the filtration device 1 will be described.

  The bag-like filter 2 is attached to the filter device 1 of the present embodiment by attaching the bag-like filter 2 to the filter attachment member 42 so that the open end portion of the bag-like filter 2 is folded outward. At this time, the opening end of the bag-like filter 2 is mounted inside the mounting annular groove 50. By mounting the opening end of the bag-shaped filter 2 in the mounting annular groove 50 in this way, the opening end of the bag-shaped filter 2 on the outer peripheral surface of the filter mounting member 42 can be easily positioned. it can. FIG. 8 shows a filter attachment state in which the bag-like filter 2 is attached to the filter attachment member 42. It is also possible to fix the filter mounting member 42 to the bag-like filter 2 with an adhesive or fusion. In this case, when the bag-shaped filter 2 is replaced, both the bag-shaped filter 2 and the filter mounting member 42 are replaced.

  Next, the connecting cylinder member 51 is set on the filter attachment member 42 in the filter attachment state to which the bag-like filter 2 is attached. This set of connection cylinder members 51 is inserted into the opening of the upper end portion of the connection base 52 of the connection cylinder member 51 with the tip of the bag-like filter 2 as the head, and the filter mounting member 42 is inserted through the bag-like filter 2. This is performed by making the lower surface of the annular flange portion 49 face the upper surface of the annular inner flange portion 53 of the connecting tube member 51. FIG. 9 shows a set state in which the connecting cylinder member 51 is set on the filter mounting member 42 in the filter mounting state. The filter mounting member 42 in the filter mounting state may be set on the connecting cylinder member 51.

  Subsequently, the set-like connecting cylinder member 51 in which the connecting cylinder member 51 is set on the filter attaching member 42 in the filter attaching state is opposed to the lower side of the ring attaching body attached to the inner surface of the upper lid. FIG. 10 shows a state in which the set-like connecting cylinder member 51 in which the connecting cylinder member 51 is set to the filter attaching member 42 in the filter attaching state is opposed to the lower side of the ring attaching body attached to the inner surface of the upper lid.

  Next, the connecting tube member 51 in the set state is made to face the lower side of the mounting body 41 fixed to the inner surface of the upper lid 15, and then the first insertion groove 54 a of the connecting tube member 51 is provided with the locking pin provided in the mounting body 41. Insert into 45 from below. A state in which the first insertion groove 54a is inserted into the locking pin 45 is shown in FIG.

  Next, when the insertion of the first insertion groove 54a into the locking pin 45 is completed, the connecting cylinder member 51 is rotated in the circumferential direction. The locking pin 45 is inserted into the second insertion groove 54b by rotating the connecting cylinder member 51 in the circumferential direction. FIG. 12 shows a state in which the second insertion groove 54 b is inserted into the locking pin 45. In FIGS. 10 to 12, only the main parts are denoted by reference numerals.

  When the locking pin 45 is inserted into the second insertion groove 54b, the locking groove 54 is locked to the locking pin 42, and the connection mounting member 41 connects the filter mounting member 42 in the filter mounting state to the mounting body 41. It becomes a state. In this connected state, as shown in detail in FIGS. 6 and 7, the bag-like filter 2 is interposed between the upper surface of the annular flange 49 of the filter mounting member 42 and the lower end surface of the mounting body 41 via an O-ring 46. And the bag-like filter 2 is pressed between the lower surface of the annular flange 49 of the filter mounting member 42 and the upper surface of the annular inner flange 53 of the connecting tube member 51. At this time, the O-ring 46 is in close contact with the bag-like filter 2 in an elastically deformed state compressed in the vertical direction.

  The bag-like filter 2 is attached to the upper lid 15 by operating the operation lever of the catch clip 37 to remove the hook of the operation side member 37a from the side member 37b and releasing the fastening of the upper lid 15 to the outer case 14. Thereafter, the upper lid 15 is moved upward, the set pin 35 is attached to the pin hole 34 a of the positioning rod 34, and then the set pin 35 is placed in the notch groove 27 from above, so that the upper lid 15 is placed above the outer case 14. This is performed after maintaining the state positioned at. Accordingly, since the operator's hands can be used when attaching the bag-like filter 2 to the upper lid 15, the upper lid 15 is held with one hand and the bag-like filter 2 is attached to the upper lid 15 with the remaining hands. There is no need to perform such complicated work. As a result, workability by the worker is remarkably improved, and the upper lid 15 can be reliably prevented from dropping from the worker's hand during the work.

  In this way, the bag-like filter 2 is pressed on both the upper and lower sides of the annular flange portion 49 of the filter mounting member 42, so that the bag-like shape is filtered depending on the weight of the filter lump accumulated inside the bag-like filter 2 during filtration. It is possible to reliably prevent the opening end portion of the filter 2 from coming off from the filter attachment means 39. In addition, as long as the connecting cylinder member 51 is not rotated, the state in which the bag-like filter 2 is attached to the upper lid 15 can be reliably held.

  When the O-ring 46 is not provided, the bag-like filter 2 is pressed between the upper surface of the annular flange 49 of the filter mounting member 42 and the lower end surface of the mounting body 41, and the filter mounting member 42 The bag-like filter 2 is pressed between the lower surface of the annular flange portion 49 and the upper surface of the annular inner flange portion 53 of the connecting cylinder member 51.

  Next, the coolant filtering operation in the filtering device 1 of the present embodiment will be described.

  The coolant stored in the coolant tank is pumped inside the pipe by a pump or the like and flows into the bag-like filter 2 from the inlet 11. Then, the coolant that has flowed into the bag-like filter 2 passes through the bag-like filter 2 from the inside toward the outside. When this coolant passes through the bag-like filter 2, the processed powder as a solid having a predetermined size or more contained in the coolant is separated by a filtering action. That is, when the coolant passes through the bag-shaped filter 2, a processed powder having a predetermined size, for example, 20 μm or more, contained in the coolant is captured by the stitches of the bag-shaped filter 2. And the filtrate which passed the bag-like filter 2 flows down the inside of the inner case 13, flows out to the outside from the outlet 12, and then returns to the coolant tank.

  A lump that is a processed powder of a predetermined size or larger captured inside the bag-like filter 2 is clogged and accumulated from the front end side (lower end side) inside the bag-like filter 2. At this time, since the bag-like filter 2 is formed to be elastically stretchable by elastic fibers, the bag-like filter 2 is sequentially extended in the length direction as the filter lump is accumulated, and the filter lump is accumulated. The part expands in diameter. When the bag-like filter 2 is expanded, even when the bag-like filter 2 is clogged with the filter cake, which is a processed powder separated from the coolant, the bag-like filter 2 expands and the stitches of the bag-like filter 2 are formed. Therefore, the bag-like filter 2 maintains the filtration function. The maximum elongation of the bag-like filter 2 is regulated by the bottom surface of the bottom member 17 and the maximum diameter is regulated by the filter housing 3.

  A method for replacing the bag-like filter 2 in the filtration device 1 of the present embodiment will be described.

  When replacing the bag-like filter 2 in the filtration device 1 of the present embodiment, the operation lever of the catch clip is operated to remove the operation side member 37a from the reception side member 37b and fasten the upper lid 15 to the outer case 14. After the release, the upper lid 15 is moved upward. Then, during the upward movement of the upper lid 15, that is, when the pin hole 34a of the positioning rod 34 is exposed above the positioning pipe 26, the set pin 35 is inserted into the pin hole 34a so that both ends thereof protrude from the pin hole 34a. After the insertion, the upper lid 15 is moved downward. Then, both ends of the set pin 35 are supported from below by a notch groove 27 formed at the upper end of the positioning pipe 26. Thereby, the state which the upper cover 15 moved to the upper direction of the outer case 14 is hold | maintained, and an operator's both hands become free. Further, the bag-like filter 2 does not fall off the upper lid 15 during the operation of moving the upper lid 15. That is, it is possible to prevent the bag-like filter 2 from dropping from the upper lid 15 during the operation of moving the upper lid 15.

  Next, after the connecting cylinder member 51 is rotated toward the bottom of the first insertion groove 54a in the direction opposite to that at the time of attachment, the locking pin 45 is detached from the second insertion groove 54b and removed, and then the connection cylinder member 51 is moved downward in the direction away from the mounting body 41 in the opposite direction to the mounting direction, whereby the locking pin 45 is detached from the first insertion groove 54a and the connecting cylinder member 51 is removed from the mounting body 41. .

  Next, after removing the connecting tube member 51 from the attachment main body 41, the bag-like filter 3 on which the filter cake has accumulated is removed from the filter attachment member 42. Thereafter, as described above, a new bag-like filter 2 is attached to the filter attachment member 42. The filter mounting member 42 in the filter mounting state is attached to the mounting body 41 by the connecting cylinder member 51 by the mounting method of the bag-shaped filter 2 described above, that is, by the insertion operation of the connecting cylinder member 51 and the subsequent rotating operation. Connect and attach the bag-like filter 2 to the inner surface of the upper lid 15.

  At this time, since the state in which the upper lid 15 has moved above the outer case 14 is maintained, the bag-like filter 2 can be easily attached.

  Next, when the bag-like filter 2 is attached to the inner surface of the upper lid 15, the upper lid 15 is moved upward to disengage the set pin 35 from the notch groove 27, and then the set pin 35 is removed from the pin hole 34 a of the positioning rod 34. . Thereafter, the upper lid 15 is moved downward to close the opening of the outer case 14 with the upper lid 15, and then the upper lid 15 and the outer case 14 are fastened with the catch clip 37, thereby completing the exchange of the bag-like filter 2.

  The replacement time of the bag-like filter 2 is such that the portion swollen by the filter mass of the bag-like filter 2 housed in the filter housing 3 overlaps the mark 16 provided on the outer peripheral surface of the inner case 13. It can be determined by visually recognizing that it has arrived.

  Thus, according to the filtration apparatus 1 of this embodiment, the bag-shaped filter 2 can isolate | separate the processing powder which is solid more than the predetermined magnitude | size contained in the coolant as a filtration object liquid by the stitch. .

  Moreover, according to the filtration apparatus 1 of this embodiment, since the bag-like filter 2 expands as the clogging of the bag-like filter 2 progresses, the stitches of the bag-like filter 2 are expanded, and the filtration function is reduced. A decrease in flow rate can be reduced.

  Furthermore, according to the filtration device 1 in the present embodiment, even if the stitches of the bag-like filter 2 are enlarged, the filter lump accumulated inside the bag-like filter 2 functions as a filter. The filtration function can be maintained for a long time.

  Furthermore, according to the filtration device 1 of the present embodiment, the processing powder contained in the coolant clogs and accumulates in order from the front end side (lower end side) inside the bag-like filter 2. As the filter is clogged, the bag-shaped filter 2 expands and expands in the radial direction to expand the stitches, thereby reducing the filtration function and the flow rate, and clogging occurs at the front end side of the bag-shaped filter 2. Even if it occurs, the filtering function is maintained by the unclogged opening side of the bag-like filter 2, so that the initial filtering function can be maintained over a long period as a whole.

  Therefore, according to the filtration apparatus 1 of this embodiment, the stable filtration function can be exhibited over a long period of time.

  Therefore, according to the filtration apparatus 1 in this embodiment, the lifetime of the bag-like filter 2 can be made longer than that of the conventional filtration apparatus 101.

  Moreover, according to the filtration apparatus 1 in this embodiment, since the inflow port 11 is formed in the upper lid 15, the coolant can be smoothly and surely flowed into the bag-like filter 2.

  Furthermore, according to the filtration device 1 of the present embodiment, since the outlet 12 is formed at the bottom of the outer case 14, the filtrate that has passed through the bag-like filter 2 can flow out smoothly and reliably.

  Furthermore, according to the filtration device 1 of the present embodiment, the upper lid 15 is provided with the filter attachment means 39 for detachably attaching the bag-like filter 2, so that the bag-like filter 2 can be easily attached to the upper lid 15. While being able to attach reliably, replacement | exchange of the bag-like filter 2 can be performed easily.

  Therefore, according to the filtration device 1 of the present embodiment, it is possible to easily improve the usability for the operator.

  Moreover, according to the filtration apparatus 1 of this embodiment, the filter attachment member 42 can attach or detach the bag-like filter 2 easily. Further, the connection means 43 can detachably connect the filter attachment member 42 in the filter attachment state to the attachment main body 41 and thus the upper lid 15. Further, when the filter mounting member 42 in the filter mounting state is connected to the mounting body 41, the bag-like filter is pressed between the opposing surfaces of the mounting body 41 and the filter mounting member 42. The bag-like filter 2 can be securely fixed to the filter mounting means 39, and the bag-like filter 2 can be exchanged reliably and easily. Therefore, it is possible to more easily improve the usability for the operator.

  Further, according to the filtration device 1 of the present embodiment, the connecting means 43 is formed by the connecting cylinder member 51 including the two locking pins 45 and the two locking grooves 54 disposed on the mounting body 41. Thus, the bag-like filter 2 can be connected to the upper lid 15 by a simple operation of inserting and rotating the connecting cylinder member 51, and a bag-like shape by a simple operation of reversely rotating and releasing the connecting cylinder member 51. The filter 2 can be removed from the upper lid 15.

  Further, according to the filtering device 1 of the present embodiment, the O-ring 46 as the pressure contact member is elastic to the bag-like filter 2 when the filter mounting member 42 in the filter mounting state is connected to the mounting body 41 and thus the upper lid 15. Since the bag-like filter 2 can be pressed against the filter mounting means 39 more reliably and easily because it is in close contact in the deformed state, coolant containing cutting powder passing through the inside of the bag-like filter 2 is passed through the filter mounting means 39. Thus, it is possible to easily obtain a sealing property sufficient to prevent leakage to the outside.

  Further, according to the filtering device 1 of the present embodiment, the filter mounting member 42 is positioned at the opening of the filter housing 3 because the lower end portion, which is one end portion in the axial direction, is inserted into the opening of the filter housing 3. It can be done easily.

  Moreover, according to the filtration apparatus 1 of this embodiment, since the filter container 3 is formed with resin, weight reduction can be achieved.

  In addition, according to the filtration device 1 of the present embodiment, the pouch-like filter 2 is formed so that the pouch-like filter 2 that allows the bag-like filter 2 to be visually recognized from the outside through the inner case 13 made of a transparent resin is formed. Since the bag-shaped filter 2 can be easily visualized from the outside, that is, the bag-shaped filter 2 can be easily visualized. As a result, it is possible to easily recognize the replacement time of the bag-shaped filter 2 by a simple operation in which the operator visually recognizes the degree of clogging of the bag-shaped filter 2.

  Furthermore, according to the filtration device 1 of the present embodiment, the mark 16 serving as a mark for recognizing the replacement time of the bag-like filter 2 is provided on the outer peripheral surface of the inner case 13. The replacement time of the bag-like filter 2 can be made more easily and reliably by a simple operation in which the operator visually recognizes that the enlarged diameter portion has spread from the lower side, which is the tip side of the bag-like filter 2, and has reached the mark 16. Can be recognized.

  Further, according to the filtration device 1 of the present embodiment, the replacement time of the bag-like filter 2 can be determined by a simple operation of visually recognizing from the outside, so the replacement time of the bag-like filter 2 in the conventional filtration device 1 is determined. Since it is not necessary to provide two pressure gauges for discriminating, the cost can be reduced, and the labor and time required by the operator for discriminating the replacement time of the bag-like filter 2 can be reduced. Can do.

  Therefore, according to the filtration apparatus 1 of this embodiment, the further improvement of the usability by an operator can be aimed at easily.

  Furthermore, according to the filtration device 1 of the present embodiment, the case body 4 includes the inner case 13 formed of a transparent resin, the outer case 14 formed with the observation window 28, and the upper lid 15. As compared with the case main body 4 formed in a bottomed cylindrical shape by a conventional metal, the weight can be reduced. By this weight reduction, workability such as installation work and filter replacement work by an operator can be improved.

  Further, according to the filtration device 1 in the present embodiment, the upper lid 15 and the outer case 14 are formed so as to be detachable with a single operation by the catch clip 37, so that the upper lid 15 and the outer case 14 can be easily attached and detached. It can be done reliably.

  Furthermore, according to the filtration device 1 of the present embodiment, the positioning pipe 26 and the positioning bar 34 are provided. Therefore, when the upper lid 15 is attached to the case body 4, the positioning bar 34 is inserted into the positioning pipe 26. Thereby, the rotation along the circumferential direction of the upper lid 15 with respect to the outer case 14 can be prevented. As a result, the alignment in the circumferential direction between the operation side member 37a and the receiving side member 37b of the catch clip 37 can be easily and reliably made appropriate. Thereby, the operability of the catch clip 37 is improved.

  Furthermore, according to the filtration device 1 of the present embodiment, since the stretchable yarn constituting the bag-like filter 2 is used for elastic socks, elastic stockings and the like, existing yarn can be used. The cost of the bag-like filter 2 can be easily reduced.

  In addition, this invention is not limited to embodiment mentioned above, A various change is possible as needed. For example, when the flow rate of the liquid to be filtered is large, a plurality of filtration devices can be arranged in parallel.

DESCRIPTION OF SYMBOLS 1 Filtration apparatus 2 Bag-like filter 3 Filter container 4 Case main body 11 Inlet 12 Outlet 13 Inner case 14 Outer case 15 Upper lid 16 Mark 26 Positioning pipe 28 Peep window 31 Inflow pipe 34 Positioning rod 37 Catch clip 39 Filter attachment means 41 Mounting body 42 Filter mounting member 43 Connecting means 45 Locking pin 46 O-ring 51 Connecting cylinder member 54 Locking groove 54a First insertion groove 54b Second insertion groove

Claims (6)

A bag-like filter for separating a solid contained in the liquid to be filtered, a filter container having a mesh for accommodating the bag-like filter and formed in a cylindrical shape, and containing the filter container, In a filtration apparatus having an inflow port for introducing a liquid to be filtered into the bag-shaped filter and a case body having an outflow port for flowing out the filtrate after being filtered by the bag-shaped filter,
The bag-shaped filter is formed to be stretchable by knitting a stretchable yarn obtained by covering a polyurethane elastic fiber or a polyetherester elastic fiber with a synthetic fiber,
The case main body is made of a transparent resin and has a cylindrical inner case that is larger in diameter and longer than the filter container, an outer case formed in a bottomed cylindrical shape for storing the inner case, An upper lid detachably attached to the upper end of the outer case to cover the opening of the outer case;
The outlet is formed at the bottom of the outer case,
The inflow port is formed in the upper lid,
Filter attachment means for attaching the bag-like filter is provided on the upper lid ,
The filter mounting means is formed in a cylindrical shape, one end surface of which is fixed to the upper lid, and is formed in a cylindrical shape so that the bag-shaped filter has an open end outward so as to cover the one end surface. A filter mounting member that is detachably mounted so as to be folded, and a connection means that detachably connects the filter mounting member to which the bag-shaped filter is mounted and the mounting body,
The filter mounting member is formed on a cylindrical base having a smaller diameter than the outer diameter of the mounting main body and one end of the outer peripheral surface of the cylindrical base, and the outer diameter is the same as the outer diameter of the mounting main body. An annular flange portion formed on the other end side of the outer peripheral surface of the cylindrical base body, and an annular groove for mounting to which the opening end portion of the bag-like filter is attached,
The connecting means includes a plurality of locking bodies protruding radially outward from an outer peripheral surface of the mounting body, an outer diameter of the mounting body, and a bag shape in a filter mounting state in which the bag filter is mounted. A cylindrical connection base formed with a larger diameter than the outer diameter of the annular flange including the filter, and an annular inner flange formed at the other end of the inner hole of the connection base and extending toward the radial center. A first insertion groove that is formed from one end surface to the other end surface of the connection base and that radially penetrates the inside and outside through which the locking body can be inserted, and the bottom of the first insertion groove from the bottom of the connection base A connecting cylinder member having a plurality of locking grooves formed along the circumferential direction and including second insertion grooves that radially penetrate the inside and outside of the plurality of locking bodies that can be inserted. ,
When the filter mounting member in the filter mounting state is connected to the mounting body by the connecting means, the second insertion groove is locked to the locking body, and the bag-shaped filter includes the mounting body and the filter. It is formed so as to be pressed between the facing surfaces facing each other with the mounting member and between the facing surfaces facing each other of the annular flange portion and the annular inner flange portion. Filtration device. Filtration device according to claim 1, characterized in that the the mounting body and at least one of the opposing surfaces facing each other with the filter mounting member, pressing member for pressing said bag-like filter is provided. The filtration device according to claim 1 or 2 , wherein the other end portion of the filter mounting member is formed to be inserted into an opening of the filter housing. The outer case includes a bottom member formed in a bottomed cylindrical shape having an open top for supporting lower ends of the filter container and the inner case from below, and one end of the inner case. An upper member formed in a cylindrical shape for supporting the outer periphery from the outside in the radial direction, and a connection member for connecting the bottom member and the upper member at a predetermined interval;
A positioning pipe is fixed to the outer peripheral surface of the upper member, and at one end portion of the positioning pipe, two notch grooves having an open top are formed so as to face each other.
An upper portion of a positioning rod that is detachably inserted into the positioning pipe is fixed to the outer peripheral surface of the upper lid, and an upper position that is the same length as the positioning pipe from the lower end of the positioning rod, A pin hole penetrating in the radial direction perpendicular to the axial direction of the positioning rod is formed,
When the upper lid is removed from the outer case, a cylindrical set pin formed with a diameter smaller than the inner diameter of the pin hole can be inserted into and removed from the pin hole so that both ends protrude from the pin hole. filtration device according to any one of claims 1 to 3, characterized in that it is formed. The mesh of the filter container is formed in a mesh that allows the bag-like filter housed inside the filter container to be viewed from the outside,
5. The inspection window according to claim 1, wherein a peep window is formed in the body portion of the outer case so as to communicate the inside and the outside through which the bag-like filter can be visually recognized through the inner case. The filtration apparatus as described.
The filtration apparatus of any one of Claims. The filtration device according to any one of claims 1 to 5, wherein the liquid to be filtered is a coolant that is circulated and used in a coolant supply device of a machine tool .

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