JP5100996B2 - Filtration device - Google Patents

Description

  The present invention relates to a filtration device for filtering liquid circulating in a hydraulic circuit of a hydraulic device including, for example, a hydraulic actuator.

  A device having an actuator such as a hydraulic cylinder includes a filtering device for filtering liquid such as hydraulic oil circulating in the hydraulic circuit. The filtration device includes a filter element for filtering a liquid to be filtered.

  In the filtration device, after a predetermined period, the filter element is clogged and the filtration function is lowered. Therefore, the filter element is replaced.

  In this type of filtration device, a head including an inflow path into which a liquid to be filtered and an outflow path for returning the filtered liquid to the hydraulic circuit are incorporated, and a filter element is accommodated. And a housing assembled to the head. The filter element can be replaced by removing the housing from the head.

  However, the location where the filtration device is assembled in the device is not necessarily a location suitable for the assembly operation of the filtration device.

  That is, depending on the location where the filtration device is assembled, it may be necessary to incline the unit even if it is intended to be assembled to the head after the filter element is accommodated in the housing. In such a case, it is conceivable that the filter element comes out of the housing.

  Therefore, when the filtration device is assembled to the hydraulic circuit, the filter element is assembled and fixed to the head in advance, and then the housing is assembled to the head.

  However, in general, the housing has a cylindrical shape that is closed at one end, and receives the filter element from the opening at the other end, and the opening is closed by the head.

  Therefore, when the housing is assembled to the head after the filter element is assembled to the head as described above, the housing can be assembled to the head while accommodating the filter element.

  That is, when assembling the housing, a working space that can accommodate the height of the fill element and the height of the housing is required. It is difficult to secure such a space.

  Therefore, a filtering device has been proposed that includes an element pressing member that prevents the filter element from coming out of the housing separately from the filter element. In this type of filtration apparatus, after the filter element is accommodated in the housing, the filter element is fixed in the housing by installing an element pressing member. This prevents the filter element from exiting the housing.

  In this type of filtration device, the working space when the housing is assembled to the head can be kept small.

  However, when the structure is provided with the element pressing member as described above, when the filter element is fixed in the housing, the filter element is accommodated in the housing, and then the element pressing member is installed.

  That is, since the element pressing member must be housed in the housing separately from the work of housing the filter element in the housing, the efficiency of the work of fixing the filter element in the housing is deteriorated. The same applies to the operation of taking out the filter element from the housing. For this reason, the efficiency of the replacement | exchange operation | work of a filter element worsens.

  Therefore, an object of this invention is to provide the filtration apparatus which can replace | exchange a filter element efficiently.

The filtration device according to claim 1 includes a head, a filter element, and a housing. The head includes an inflow path connected to a flow path through which the liquid to be filtered flows and into which the liquid to be filtered flows. The filter element filters the liquid to be filtered. The housing has an opening through which the filter element passes, accommodates the filter element inside, and is attached to the head so as to communicate with the inflow passage and to close the opening. The filter element includes an element main body and an element pressing body. The element body includes a filter medium. The element pressing body is provided on the element body. The element pressing body includes a contact portion that can be displaced in a direction toward and away from the inner surface of the housing. The housing is provided with a blocking portion that prevents the filter element from coming out of the housing by contacting the contact portion. The contact portion can be displaced to a position where contact with the blocking portion is released.

  In the filtration device configured as described above, the element pressing body is provided integrally with the filter element, so that a separate pressing member for fixing the filter element in the housing is not required.

  Therefore, by performing the operation of accommodating the filter element in the housing, the element pressing body can be accommodated in the housing at the same time. That is, since the filter element and the element pressing body are not separately accommodated in the housing, the efficiency of the work of fixing the filter element in the housing is improved. Similarly, even when the filter element is taken out from the housing, the element pressing body is not taken out separately.

Furthermore, the element pressing body has a spring portion. The contact portion is biased toward the inner surface of the housing by the elasticity of the spring portion.

  According to this configuration, the position of the contact portion can be displaced by the elasticity of the spring portion. Therefore, it is only necessary to press the contact portion when the position of the contact portion is displaced. That is, no complicated operation is required to displace the contact portion.

Further, a plurality of the contact portions are provided so as to face each other with the spring portion interposed therebetween. A grip portion is formed on the contact portion.

According to this configuration, when a finger is put on the gripping portion to grip the filter element, each contact portion is naturally pressed in the direction in which the spring bends. As a result, the spring portion bends naturally. That is, the operation of supporting the filter element and the operation of bending the spring portion are performed together.
The filtration device according to claim 2 is connected to a flow path through which the liquid to be filtered flows and has a head including an inflow path through which the liquid to be filtered flows, a filter element for filtering the liquid to be filtered, A housing that has an opening through which the filter element passes, accommodates the filter element inside, and communicates with the inflow passage and is attached to the head so as to close the opening. The filter element is an element main body provided with a filter medium, and an element pressing body provided at an end of the element main body opposite to an insertion end when the element main body is accommodated in the housing. And an element pressing body including a contact portion that is displaceable in a direction toward and away from the inner surface of the housing and has a grip portion, and a spring portion that biases the contact portion toward the inner surface of the housing. . The housing is provided with a blocking portion that prevents the filter element from coming out of the housing by contacting the contact portion. The contact portion is displaceable to a position where the contact with the blocking portion is released, and a plurality of the contact portions are provided so as to face each other with the spring portion interposed therebetween. The grip portion does not overlap the filter medium in a direction away from the housing of the contact portion.

According to a third aspect of the present invention, in the filtration device according to the first or second aspect, the blocking portion accommodates at least a part of the contact portion and at least the contact portion in a direction in which the filter element exits the housing. It is a groove | channel which has a surface part which can contact a part.

  According to this configuration, the contact portion and the surface portion of the groove come into contact with each other, thereby preventing the filter element from moving in the direction of exiting the housing.

In the filtration device according to a fourth aspect, in the first or second aspect, the blocking portion is an inner surface of the housing. The friction generated between the contact portion and the blocking portion prevents the filter element from exiting the housing.

In the filtration device according to a fifth aspect, in the first or second aspect, the element pressing body is detachable from the element body.

  According to this configuration, the element pressing body is reused by removing the element pressing body from the element body.

The filter device according to claim 6 is the filter device according to claim 1 or 2, wherein the filter element is made of resin.

  According to this configuration, post-processing of the replaced filter element is relatively easy.

  According to the present invention, the filter element can be exchanged efficiently.

  A filtration device 10 according to a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a cross-sectional view of the filtration device 10 of the present embodiment. As shown in FIG. 1, the filtration device 10 of this embodiment is incorporated in a hydraulic circuit 5 such as a heavy machine including a hydraulic actuator, for example. The hydraulic oil L flows in the hydraulic circuit 5.

  The hydraulic oil L flows into the filtration device 10 from the right side in the figure. The hydraulic oil L immediately before flowing into the filtering device 10 is the hydraulic oil L1 to be filtered. The hydraulic oil L1 to be filtered is an example of the liquid to be filtered as referred to in the present invention. The hydraulic oil L <b> 2 filtered by the filtering device 10 is returned to the hydraulic circuit 5.

  FIG. 2 is a cross-sectional view showing a state in which the filtering device 10 is disassembled. As shown in FIG. 2, the filtration device 10 includes a head 20, a housing 30, and a filter element 40.

  The head 20 includes a first member 21, a second member 22, a relief valve 23, and the like.

  The first member 21 has an inflow path 24 and an outflow path 25. As shown in FIG. 1, the inflow path 24 is connected to the outflow portion 5 a of the hydraulic circuit 5. The inflow path 24 is bent in a substantially L shape. The inflow path 24 is bent toward a filter element 40 (described later) assembled to the head 20.

  As shown in FIG. 2, the first member 21 has a protrusion 26 formed substantially at the center. The protrusion 26 protrudes toward a filter element 40 described later that is assembled to the head 20. A part of the outflow passage 25 is formed in the protrusion 26. One end of the outflow passage 25 opens at the tip of the protrusion 26. As shown in FIG. 1, the other end of the outflow passage 25 is connected to the inflow portion 5 b of the hydraulic circuit 5.

  As shown in FIG. 2, the inflow path 24 and the outflow path 25 are adjacent to each other with a wall 27 therebetween. The relief valve 23 is provided on a wall 27 that separates the inflow path 24 and the outflow path 25. When the relief valve 23 is opened, the inflow path 24 and the outflow path 25 communicate with each other. The relief valve 23 opens when the pressure of the hydraulic oil L1 flowing into the inflow path 24 becomes a predetermined value or more.

  The second member 22 has a substantially cylindrical shape, for example. The second member 22 is assembled to the first member 21 so as to surround the protrusion 26. For example, the first member 21 and the second member 22 are screwed together. A space A defined between the protrusion 26 and the peripheral wall 22 a of the second member 22 communicates with the inflow path 24.

  The housing 30 includes a first member 31 and a second member 32. The first member 31 has a cylindrical shape with one end closed.

  The second member 32 is a cylindrical member. The inner circumference of the second member 32 is slightly larger than the inner circumference of the first member 31. One end of the second member 32 is fixed by welding, for example, to the open end of the first member 31 so that the internal space of the second member 32 communicates with the internal space of the first member 31. The second member 22 of the head 20 is sized to substantially fit with the second member 32 of the housing 30.

  A female screw portion 32 a is formed on the inner peripheral portion of the second member 32 of the housing 30. A male screw portion 22 b is formed on the outer peripheral portion of the second member 22 of the head 20. As shown in FIG. 1, the male screw portion 22 b of the head 20 is screwed with the female screw portion 32 a of the housing 30, so that the housing 30 is detachably fixed to the head 20. An O-ring 33 is provided between the second member 22 of the head 20 and the second member 32 of the housing 30. The O-ring 33 provides a liquid-tight seal between the second member 22 of the head 20 and the second member 32 of the housing 30.

  As described above, when the housing 30 and the head 20 are assembled to each other, the protrusion 26 of the first member 21 of the head 20 protrudes into the housing 30. The protrusion 26 is disposed substantially concentrically with the housing 30.

  The filter element 40 is accommodated in the housing 30 from the opening 30b of the housing 30 (opening of the second member 32). As shown in FIG. 2, the filter element 40 includes a filter medium 41, an inner cylinder 42, a first support member 43, and a second support member 44.

  The filter medium 41 is made of resin and is rounded into, for example, a pleat shape. Therefore, the filter medium 41 is substantially cylindrical. The inner cylinder 42 is cylindrical. The height of the inner cylinder 42 is the same as the height of the filter medium 41. A plurality of through holes 45 are formed in the peripheral wall of the inner cylinder 42 so as to penetrate the peripheral wall in the radial direction.

  The inner cylinder 42 is accommodated inside the filter medium 41. The inner cylinder 42 is disposed substantially concentrically with the filter medium 41. When the filter medium 41 is not urged inward, the inner cylinder 42 supports the filter medium 41 by contacting the filter medium 41 and suppresses the filter medium 41 from being deformed inward.

  The first support member 43 supports the lower end of the filter medium 41 and the lower end of the inner cylinder 42. The first support member 43 is made of resin.

  The second support member 44 includes a support portion 46 and an element pressing portion 47. The element pressing portion 47 is an example of an element pressing body referred to in the present invention.

  The support portion 46 supports the upper end of the filter medium 41 and the upper end of the inner cylinder 42. In the present embodiment, the filter medium 41, the inner cylinder 42, the first support member 43, and the support portion 46 constitute an element body 48 referred to in the present invention. The element main body referred to in the present invention is a concept of a portion of the filter element excluding the element pressing body.

  The element pressing portion 47 has a main body 49, a spring portion 52, and a contact portion 53. The element pressing portion 47 is formed integrally with the support portion 46. For example, the element pressing portion 47 is formed integrally with the support portion 46. The second support member 44 is made of resin.

  The main body 49 is cylindrical. The main body 49 is integrated with the support portion 46. The main body 49 is disposed concentrically with the support portion 46. The main body 49 is located above the support portion 46. A through hole 50 into which the protrusion 26 of the head 20 is fitted is formed in the main body 49 and the support portion 46. An O-ring 51 is provided between the edge of the through hole 50 and the outer periphery of the protrusion 26. The O-ring 51 provides a liquid-tight seal between the inner periphery of the through hole 50 and the outer periphery of the protrusion 26.

  The through hole 50 communicates with the inside of the inner cylinder 42. Therefore, the inside of the inner cylinder 42 and the outflow path 25 communicate with each other.

  FIG. 3 is a plan view of the second support member 44 as viewed from above. As shown in FIG. 3, a pair of spring portions 52 are formed on the outer peripheral portion 49 a of the main body 49. Specifically, the spring portions 52 are arranged at positions facing each other with the main body 49 interposed therebetween.

  One end 52 a of the spring portion 52 is connected to the main body 49. Each spring portion 52 extends along the periphery of the main body 49 while maintaining a state separated from the outer peripheral portion 49 a of the main body 49 by a predetermined distance. Therefore, each spring part 52 can bend in the radial direction of the filter element 40 so as to fill a prescribed distance between the spring part 52 and the outer peripheral part 49 a of the main body 49.

  The contact portion 53 is formed integrally with the other end 52 b of each spring portion 52. Each contact portion 53 is disposed so as to face each other with the main body 49 and each spring portion 52 interposed therebetween. FIG. 4 is a plan view of the second support member 44 as viewed from above, showing a state before the spring portion 52 is bent and a state after the spring portion 52 is bent.

As shown in FIG. 4, when the spring portion 52 is bent, each contact portion 53 is displaced from the initial position P1 indicated by the two-dot chain line toward the radially inner side as indicated by the solid line. Can do.

  The initial position P1 is the position of the contact portion 53 when the spring portion 52 is not bent. The contact portion 53 is formed with a through hole 54 that penetrates the contact portion 53. The through hole 54 is an example of a gripping part referred to in the present invention.

  In a state where the filter element 40 is accommodated in the housing 30, each contact portion 53 deflects the spring portion 52 or releases the bent state, whereby the inner surface 30 a (first member 31) of the housing 30. The inner surface 31a of the second member 32 and the inner surface 32b of the second member 32).

  As shown in FIG. 2, a groove 35 is formed in the second member 32 of the housing 30 below the female screw portion 32a. The groove 35 has a shape that is recessed toward the radially outer side of the filter element 40 in the direction in which the contact portion 53 is displaced, in this embodiment.

  FIG. 5 is a cross-sectional view showing a state in which the filter element 40 is accommodated in the housing 30. As shown in FIG. 5, the size of the contact portion 53 or the length of the spring portion 52 along the radial direction of the filter element 40 is such that a part of the contact portion 53 is located when the filter element 40 is accommodated in the housing 30. It is adjusted so as to be approximately fitted in the groove 35.

  Furthermore, in the present embodiment, the spring along the size of the contact portion 53 or the radial direction of the filter element 40 so that the tip 53a of the contact portion 53 abuts on the side end surface 35a (the side end surface on the radially outer side) of the groove 35. The length of the part 52 is adjusted.

  That is, in a state where a part of the contact portion 53 is accommodated in the groove 35, the spring portion 52 is slightly bent. Thus, the filter element 40 is accommodated in the housing 30 when the tip 53a of the contact portion 53 contacts the side end surface 35a of the groove 35 in a state where a part of the contact portion 53 is accommodated in the groove 35. In the state, the filter element 40 is restrained from shifting in the radial direction.

  FIG. 6 is a plan view of the state in which the filter element 40 is accommodated in the housing 30 as viewed from above. When a part of each contact portion 53 is substantially fitted in the groove 35 and the filter element 40 moves in the direction of exiting the housing 30, a portion 53 b of the contact portion 53 is formed in the groove 35 as indicated by a dotted line in the figure. It contacts the upper end surface 35b. Therefore, the filter element 40 is prevented from coming out of the housing 30.

  FIG. 7 is a cross-sectional view showing a state in which the contact portion 53 has come out of the groove 35. As shown in FIG. 7, when the filter element 40 is accommodated in the housing 30 or when the filter element 40 is taken out from the housing 30, each spring portion 52 is bent toward the inside in the radial direction of the filter element 40. Thus, the contact portion 53 is displaced to a position where the contact portion 53 does not interfere with the upper end surface 35 b of the groove 35. Therefore, the spring portion 52 is adjusted so that the contact portion 53 can be displaced to a position where the contact portion 53 does not interfere with the upper end surface 35 b of the groove 35. Specifically, the space defined between the spring portion 52 and the main body 49 is adjusted.

  As shown in FIG. 1, in the filtration device 10 configured as described above, the hydraulic oil L <b> 1 to be filtered flows into the inflow path 24 of the head 20 from the outflow portion 5 a of the hydraulic circuit 5. The hydraulic oil L <b> 1 passes between the inflow passage 24, the space A defined between the protrusion 26 and the second member 22, and reaches between the filter medium 41 and the inner surface 30 a of the housing 30.

  The hydraulic oil L1 that has reached the outside of the filter medium 41 is filtered in the process of passing through the filter medium 41 as indicated by an arrow. The hydraulic oil L2 filtered through the filter medium 41 passes through the through hole 45 of the inner cylinder 42 and comes out of the inner cylinder 42.

  Next, the filtered hydraulic oil L <b> 2 flows into the inflow portion 5 b of the hydraulic circuit 5 through the outflow path 25 and returns to the hydraulic circuit 5.

  Next, an example of the replacement work of the filter element 40 will be described.

  First, the housing 30 is removed from the head 20. Next, as shown in FIG. 4, the filter element 40 is gripped by passing a finger through the through hole 54 formed in the contact portion 53. At this time, by grasping the contact portion 53 (passing the finger through the through-hole 54), each spring portion 52 naturally bends radially inward. As each spring part 52 bends, each contact part 53 is displaced radially inward.

  As shown in FIG. 7, when the contact portion 53 is displaced to a position where the contact portion 53 does not interfere with the upper end surface 35 b of the groove 35, the filter element 40 is taken out from the housing 30 as shown in FIG. 8.

  The filter element 40 is made of resin. Therefore, post-processing of the used filter element 40 is relatively easy.

  The new filter element 40 is then accommodated in the housing 30. Similarly, when the filter element 40 is gripped by passing a finger through the through hole 54 of the contact portion 53, each spring portion 52 is naturally bent. Therefore, the filter element is accommodated in the housing 30 as it is.

  When the filter element 40 is accommodated in the housing 30, the contact portion 53 is fitted into the groove 35 by releasing a finger from the through hole 54.

  Next, a unit including the housing 30 and the filter element 40 is attached to the head 20. The filter element 40 is replaced by the above operation.

  In the filtration device 10 configured as described above, the element pressing portion 47 is formed integrally with the filter element 40, so that a separate pressing member for fixing the filter element 40 in the housing 30 is not required.

  Therefore, by performing the operation of accommodating the filter element 40 in the housing 30, the element pressing portion 47 is also accommodated in the housing 30 at the same time. That is, since the filter element 40 and the element pressing portion 47 are not separately accommodated in the housing 30, the efficiency of the work of fixing the filter element 40 in the housing 30 is improved.

  Similarly, even when the filter element 40 is taken out from the housing 30, the element pressing portion 47 is not taken out separately. Therefore, the efficiency of the operation | work which replaces the filter element 40 improves.

  Further, the position of the contact portion 53 can be displaced by the elasticity of the spring portion 52. Therefore, when the position of the contact portion 53 is displaced, it is only necessary to press the contact portion 53 radially inward. That is, in order to displace the contact part 53, a complicated operation is not required, so that the efficiency of exchanging the filter element 40 is improved.

  Further, a pair of contact portions 53 are provided so as to face each other with the main body 49 interposed therebetween, that is, with the spring portion 52 interposed therebetween. The contact portion 53 is formed with a through hole 54 as a grip portion.

  Therefore, when each finger is passed through the through-hole 54 to grip the filter element 40, each contact portion 53 is naturally pressed radially inward. As a result, the spring part 52 bends naturally. That is, since the operation of supporting the filter element 40 and the operation of bending the spring portion 52 can be performed at the same time, the efficiency of exchanging the filter element 40 is improved.

  Further, by adopting the groove 35 as an example of the blocking portion, the contact portion 53 and the upper end surface 35b of the groove 35 come into contact with each other, so that the filter element 40 is effectively suppressed from coming out of the housing 30.

  Further, since the filter element 40 is made of resin, the processing after replacement is relatively easy.

  Next, a filtration device 10 according to a second embodiment of the present invention will be described with reference to FIGS. 9 and 10. In addition, the structure which has a function similar to 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  In the present embodiment, the structure of the filter element 40 is different from that of the first embodiment. Other structures may be the same as those in the first embodiment. This point will be described in detail.

  FIG. 9 is a cross-sectional view of the filter element 40 of the present embodiment. FIG. 10 is a cross-sectional view showing a state in which the filter element 40 is disassembled.

  As shown in FIGS. 9 and 10, the filter element 40 includes a filter medium 41, an inner cylinder 42, a first support member 43, a second support member 44, and an element pressing member 60. Yes.

  The second support member 44 covers the upper ends of the filter medium 41 and the inner cylinder 42. A through hole 50 is formed in the center of the second support member 44. The second support member 44 of this embodiment does not have an element pressing portion.

  The element pressing member 60 has a main body 49, a spring portion 52, and a contact portion 53. The element pressing member 60 is an example of an element pressing body referred to in the present invention. In the present embodiment, the filter medium 41, the inner cylinder 42, the first support member 43, and the second support member 44 constitute an element body 48.

A female screw portion 50 a is formed on the inner peripheral portion of the through hole 50 of the second support member 44. The main body 49 of the element pressing member 60 is sized to fit approximately within the through hole 50. A male screw portion 49b that is screwed into the male screw portion 50a is formed on the outer peripheral portion 49a of the main body 49. When the male screw portion 49b and the female screw portion 50a are screwed together,
In the present embodiment, the element pressing member 60 is detachable from the element body 48. Therefore, in addition to the effects of the first embodiment, the element pressing member 60 can be reused by removing the element pressing member 60 from the element body 48.

  Next, a filtration device 10 according to a third embodiment of the present invention will be described with reference to FIG. In addition, the structure which has a function similar to 1st Embodiment attaches | subjects the same code | symbol, and abbreviate | omits description.

  In the present embodiment, the structure of the blocking portion and the structure of the element pressing portion 47 are different from those in the first embodiment. Other structures may be the same as those in the first embodiment. This point will be described in detail.

  FIG. 11 is a cross-sectional view showing a state in which the filter element 40 is accommodated in the housing 30. As shown in FIG. 11, the blocking portion of the present embodiment is not a groove shape. The blocking portion is a surface portion 70 that contacts the tip 53 a of the contact portion 53. The surface portion 70 is a part of the inner surface 30 a of the housing 30. The surface portion 70 may be formed with a rough surface, for example, in order to increase friction generated between the surface portion 70 and the tip 53a of the contact portion 53.

  In the present embodiment, the filter element 40 is prevented from coming out of the housing 30 due to friction generated between the tip 53 a of the contact portion 53 and the surface portion 70. Therefore, the spring portion 52 is adjusted so that the contact portion 53 can be sufficiently biased toward the surface portion 70.

  In the present embodiment, since the surface portion 70 is the blocking portion, a large process is not required to form the blocking portion. Therefore, in addition to the effects of the first embodiment, the housing 30 can be formed relatively easily.

  Moreover, since the front-end | tip 53a of the contact part 53 contacts the surface part 70 in radial direction, it is suppressed that the filter element 40 shifts | deviates to radial direction. Therefore, the protrusion 26 can be easily guided to the through hole 45 when the unit including the housing 30 and the filter element 40 is assembled to the head 20.

Sectional drawing of the filtration apparatus which concerns on the 1st Embodiment of this invention. Sectional drawing which shows the state by which the filtration apparatus shown by FIG. 1 was decomposed | disassembled. The top view which looked at the 2nd supporting member shown by FIG. 1 from upper direction. The top view which looked at the 2nd supporting member from the upper direction which shows the state before the spring part shown by FIG. 1 bent, and the state after bending. Sectional drawing which shows the state in which the filter element was accommodated in the housing shown by FIG. The top view which looked at the state in which the filter element was accommodated in the housing shown by FIG. 1 from upper direction. Sectional drawing which shows the state from which the contact part shown by FIG. 1 protruded from the inside of a groove | channel. Sectional drawing which shows a mode that the filter element shown by FIG. 1 is taken out from the inside of a housing, or a mode that a filter element is accommodated in a housing. Sectional drawing of the filter element of the filtration apparatus which concerns on the 2nd Embodiment of this invention. Sectional drawing which shows the state by which the filter element shown by FIG. 9 was decomposed | disassembled. Sectional drawing which shows the state in which the filter element was accommodated in the housing of the filtration apparatus which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 5 ... Hydraulic circuit (flow path), 10 ... Filtration apparatus, 24 ... Inflow path, 30 ... Housing, 30a ... Inner surface, 30b ... Opening, 35 ... Groove (blocking part), 35b ... Upper end surface (surface part to contact), DESCRIPTION OF SYMBOLS 40 ... Filter element, 47 ... Element pressing part (element pressing part), 48 ... Element main body, 52 ... Spring part, 53 ... Contact part, 54 ... Through-hole (gripping part), 60 ... Element pressing member (element pressing body) , 70 ... face part (blocking part), L1 ... hydraulic oil to be filtered (liquid to be filtered).

Claims (6)

A head having an inflow path connected to a flow path through which the liquid to be filtered flows and into which the liquid to be filtered flows;
A filter element for filtering the liquid to be filtered;
A housing that has an opening through which the filter element passes, accommodates the filter element inside, and communicates with the inflow path and attaches to the head so as to close the opening;
Comprising
The filter element is
An element body provided with a filter medium;
An element pressing body provided in the element body, the contact portion being displaceable in a direction toward and away from the inner surface of the housing and a grip portion is formed, and the contact portion toward the inner surface of the housing An element pressing body including a spring portion to be biased,
The housing is provided with a blocking portion that prevents the filter element from coming out of the housing by contacting the contact portion,
The filtering device is characterized in that the contact portion is displaceable to a position where the contact with the blocking portion is released, and a plurality of the contact portions are provided so as to face each other with the spring portion interposed therebetween . A head having an inflow path connected to a flow path through which the liquid to be filtered flows and into which the liquid to be filtered flows;
A filter element for filtering the liquid to be filtered;
A housing that has an opening through which the filter element passes, accommodates the filter element inside, and communicates with the inflow path and attaches to the head so as to close the opening;
Comprising
The filter element is
An element body provided with a filter medium;
An element pressing body provided at an end of the element body opposite to the insertion end when the element body is accommodated in the housing, and is displaceable in a direction toward and away from the inner surface of the housing. And an element pressing body including a contact portion in which a grip portion is formed and a spring portion that biases the contact portion toward the inner surface of the housing,
The housing is provided with a blocking portion that prevents the filter element from coming out of the housing by contacting the contact portion,
The contact portion is displaceable to a position where the contact with the blocking portion is released, and a plurality of the contact portions are provided so as to face each other with the spring portion interposed therebetween,
The grip portion does not overlap the filter medium in a direction away from the housing of the contact portion.
A filtering device characterized by that.   The said blocking part is a groove | channel which has a surface part which can contact at least one part of the said contact part in the direction which the said filter element comes out of the said housing while accommodating at least one part of the said contact part. The filtration apparatus according to 1 or 2. The blocking portion is an inner surface of the housing,
The filtration device according to claim 1, wherein the filter element is prevented from coming out of the housing due to friction generated between the contact portion and the blocking portion.   The filtration device according to claim 1, wherein the element pressing body is detachable from the element main body.   The filtration device according to claim 1, wherein the filter element is made of resin.

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