JP4457062B2 - Lid separation type container - Google Patents

Description

  The present invention relates to a lid separation type container suitable for an element exchange type oil filter or the like, and relates to a technique for realizing high sealing performance and the like while achieving weight reduction and cost reduction.

  An internal combustion engine (hereinafter referred to as an engine) is equipped with a lubrication system comprising an oil pump, an oil filter, a strainer, a relief valve, etc., in order to pump engine oil to each part to lubricate the valve mechanism and cool the piston. It has been. There are various types of oil filters, but a spin-on type is mainly used for small and medium engines mounted on passenger cars and the like. The spin-on type oil filter is a filter element formed by folding filter paper and accommodated in a hermetically sealed casing, and is screwed into a screw boss projecting on the side surface of the crankcase.

  Conventionally, as a spin-on type oil filter, a cartridge type having a sealed integral casing has been mainstream, but separation of the filter element and the casing for separation and disposal cannot be easily performed, and a resource saving viewpoint Therefore, the adoption of an element exchange type in which only the filter element can be exchanged is currently being studied, because it is desirable to reuse the casing. In an element exchange type oil filter, it is necessary to detachably fasten a casing housing a filter element and a relief valve, and a set plate in which a female screw for attachment to an engine and a flow path for engine oil are formed.

As a method for fastening the casing and the set plate, a screw-in structure in which a ring nut fitted on the casing is screwed to a male screw formed on the outer periphery of the set plate is known (see Patent Documents 1 to 3). Many of the set plates are forged molded products made of steel (Patent Documents 1 and 2), but press-formed products made of steel plates are also proposed (Patent Document 3). Since an O-ring is interposed as a sealing material between the casing and the set plate, an annular support wall and a support seat surface for supporting the O-ring are formed on the set plate. In addition, in the case where the O-ring support wall is formed on the set plate, as described in Patent Document 2, there is one provided with a drop-off preventing projection for preventing the O-ring from coming off at the upper end of the support wall. In many cases, the set plate has an annular convex portion that is metal-touched to the filter mounting surface in order to regulate the compression amount (crushing allowance) of the gasket that seals with the filter mounting surface of the engine.
Japanese Patent No. 3076495 Japanese Patent Laid-Open No. 2002-122014 Japanese Patent No. 2948585

  During engine operation, relatively high pressure engine oil flows into the oil filter, and a high seal pressure acts on the joint between the casing and the set plate. Among the conventional element exchange type oil filters, those described in Patent Documents 1 and 2 increase the wall thickness of the support wall and the support seat surface by making the set plate a forged product (that is, seals). Securing strength and rigidity that can withstand pressure) can be carried out relatively easily, but large forging press facilities are required, which inevitably increases production costs and decreases mass productivity. Moreover, in the thing described in patent document 3, although it is hard to produce the problem of manufacturing cost or mass-productivity, when the thing of the thickness which can be press-molded comparatively easily is used for a raw material steel plate, a support wall is carried out by sealing pressure. May be deformed and sufficient sealing performance may not be ensured.

  On the other hand, the set plate of the forged molded product described in Patent Document 2 has a problem in that the number of man-hours for processing is increased because the drop-off prevention protrusion for retaining the O-ring is formed by turning after forging. . Further, in the set plate of the press-molded product described in Patent Document 3, when the oil filter is screwed into the filter mounting surface with an excessive tightening torque, the annular convex portion formed by bending the steel plate is elastically or plastically deformed. The gasket may be compressed excessively.

  The present invention has been made in view of such a background, and an object thereof is to provide a lid-separated container that achieves high sealing performance and the like while achieving weight reduction and cost reduction.

  A lid-separated container according to the invention of claim 1 has a bottomed cylindrical casing having an outward flange on the outer periphery on the opening end side, covers the opening end of the casing, and has a lid-side locking portion on the outer periphery thereof. A disc-shaped lid, and an annular seal that is interposed / supported between an inner peripheral surface of the casing and a seal support wall erected on the lid, and performs a seal between the casing and the lid; An annular lock ring having a flange pressing portion that contacts the end surface of the outward flange and presses the outward flange toward the lid side, and a lock ring side locking portion that engages with the lid side locking portion; The lock ring is externally fitted to the casing from the closed end side of the casing, and then the lid and the lock ring are rotated relative to each other to thereby rotate the lid side locking portion. A lid separation type container that engages or separates with the locking portion on the lock ring side, wherein the lid is a press-molded product made of a metal plate, and the seal support wall has a U-shape. It is characterized in that it is formed by folding back.

  According to a second aspect of the present invention, in the lid-separated container according to the first aspect, a drop-off preventing protrusion of the annular seal deformed toward the annular seal side is formed to bulge at the folded portion of the support wall. It is characterized by that.

  According to a third aspect of the present invention, in the lid-separated container according to the second aspect, the drop-off prevention protrusion is formed when the lid-side locking portion and the lock ring-side locking portion are engaged. It is formed at a position separated from the annular seal.

  According to a fourth aspect of the present invention, in the lid-separated container according to the third aspect, the drop-off prevention protrusion is formed only on the tip side from the turning point of the metal plate.

  Moreover, the invention of claim 5 is the lid separation type container according to any one of claims 1 to 4, wherein the metal plate is folded back in a close contact state in the seal support wall. Features.

  According to a sixth aspect of the present invention, there is provided a bottomed cylindrical casing having an outward flange on the outer periphery of the opening end side, the opening end of the casing, and a lid-side locking portion on the outer periphery thereof. A disc-shaped lid having an end portion on its end surface, a flange pressing portion that contacts the end surface of the outward flange and presses the outward flange toward the lid side, and a lock ring side that engages with the lid-side locking portion An annular lock ring having a locking portion, and after the lock ring is externally fitted to the casing from the closed end side of the casing, by rotating the lid and the lock ring relative to each other, The lid side latching portion and the lock ring side latching portion are engaged with or separated from each other, and the annular convex portion is attached to the attached device in a state of contacting the attachment surface of the attached device. A lid separated containers, wherein the lid is a press-molded article to the material of the metal plate, the annular convex portion, characterized in that the metal plate is formed by folding the U-shape.

  According to a seventh aspect of the present invention, in the lid-separated container according to the sixth aspect, the metal plate is folded back in a close contact state in the annular convex portion.

  According to the lid separation type container of claim 1, even if the lid is manufactured using a steel plate having a relatively small thickness, the rigidity and strength of the seal support wall can be increased, and the high sealing performance that can withstand the sealing pressure. Can be realized. Moreover, according to the lid separation type container of claim 2, since the drop-off preventing projection for preventing the annular seal from falling off from the lid can be formed without performing post-processing such as cutting, reduction in manufacturing man-hours and manufacturing costs is realized. Is done. In addition, according to the lid separation type container of the third aspect, since the annular seal does not contact the part where the drop-off preventing projection is formed, the seal support wall and the annular seal are in good contact with each other, and high sealing performance is realized. The Further, according to the lid separation type container of the fourth aspect, the seal support wall and the annular seal come into good contact with each other since distortion deformation of the seal surface due to the formation of the drop-off prevention protrusion can be suppressed. High sealing performance is realized. In addition, according to the lid separation type container of claim 5, the rigidity and strength of the seal support wall can be further increased, higher sealing performance can be realized, and the metal plate is folded back in a close contact state. This also contributes to the miniaturization of the container. According to the lid separation type container of claim 6, even if the lid is manufactured using a steel plate having a relatively small thickness, the rigidity and strength of the annular convex portion can be increased, and the lid can be attached to the attached device. The deformation of the annular convex portion at the time of occurrence becomes difficult. In addition, according to the lid separation type container of claim 7, the rigidity and strength of the annular convex portion can be further increased, and the deformation of the annular convex portion when it is attached to the mounted device is further less likely to occur. It contributes also to size reduction of a container because the board was folded in close contact.

  Hereinafter, an embodiment in which the present invention is applied to an element exchange type oil filter for an automobile engine will be described in detail with reference to the drawings.

[First Embodiment]
1 is a perspective view showing an oil filter according to the first embodiment, FIG. 2 is a longitudinal sectional view showing the oil filter according to the first embodiment, and FIG. 3 is an exploded perspective view showing the oil filter according to the first embodiment. 4 is a plan view of the set plate according to the first embodiment, FIG. 5 is a cross-sectional view taken along the line VV in FIG. 4, and FIG. 6 shows a process of forming an O-ring support wall according to the first embodiment. It is explanatory drawing. 7 is a plan view of the lock ring according to the first embodiment, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. FIG. 9 is an enlarged view of a portion IX in FIG.
In the embodiment, for the sake of convenience of explanation, the upper side in FIGS. 1 to 3 is the upper side, and the lower side is the lower side.

<< Configuration of First Embodiment >>
<Overall configuration>
As shown in FIGS. 1 to 3, the oil filter 1 according to the first embodiment includes a bottomed cylindrical casing 2, and a disk-shaped set plate (lid) 3 that covers the lower end (opening end) of the casing 2. An annular lock ring 4 for fastening the set plate 3 to the casing 2 is a main component.

  As shown in FIG. 2, the casing 2 includes a known filter element 5 made of filter paper or the like folded in a chrysanthemum shape, a spring (plate spring) 6 that biases the filter element 5 downward, and a filter element 5. A relief valve 7 for accommodating engine oil when clogged is accommodated. Further, the set plate 3 includes a gasket 8 that seals between the seat surface S formed on the crankcase and the like, a holding ring 10 that fixes the gasket 8 to the set plate 3, and a seal between the casing 2. An O-ring 11 that performs the check and a check valve 12 that prevents drain back of engine oil while the engine is stopped are attached.

<Casing>
The casing 2 is a press-formed product (cylindrical drawn product) of a thin steel plate, and as shown in FIG. 3, a polygonal shape (14 corners in the illustrated example) tool engaging portion 21 that engages with a fastening tool is at the upper end. And the outward flange 23 formed on the opening end side of the body portion 22. On the outward flange 23, a non-rotating convex portion 25 as a casing side detent portion, a notch 26 through which a locking lug portion 54 of the lock ring 4 described later passes, and a biasing convex portion 27 elastically contacting the set plate 3. Are formed at three equal angular intervals (120 °) with different angular phases.

<Set plate>
The set plate 3 is a press-molded product made of a relatively thick steel plate, and as shown in FIGS. 4 and 5, has a boss 31 erected upward at the center thereof. The boss 31 has an internal thread 32 formed on the inner peripheral surface thereof that is screwed into a screw boss B (see FIG. 2) formed on a crankcase or the like, and serves as an engine oil outflow path from the filter element 5 to the engine side. ing. Around the boss 31, eight through holes 33 are formed at equal angular intervals (45 ° intervals), and these through holes 33 serve as an inflow passage of engine oil from the engine side to the filter element 5. Yes.

  An O-ring support wall 34 that holds the O-ring 11 between the lower end inner peripheral surface of the casing 2 is erected on the outside of the through hole 33. As shown in FIG. 5, the O-ring support wall 34 is formed by folding the material steel plate in an inverted U-shape in close contact (with no gap), and further, the O-ring 11 falls outward to prevent the O-ring 11 from coming out. A prevention protrusion 34a is provided at the upper end. In the case of this embodiment, as shown in FIG. 6 (a), after forming the O-ring support wall 34 (intermediate shape) by several press processes, the inner peripheral surface is formed as shown in FIG. 6 (b). The upper part of the O-ring support wall 34 is crushed by the punch P while being supported by the pressing die D. As a result, the upper surface of the O-ring support wall 34 becomes flat, and at the same time, the surplus wall flows outward and the drop-off prevention protrusion 34a is bulged. In the case of this embodiment, the drop-off prevention protrusion 34a is formed only on the tip side from the turning point BP of the material steel plate.

  An annular recess 35 is formed on the upper surface of the set plate 3 outside the O-ring support wall 34 so that the lower end of the casing 2 is close to the seat plate S. When the oil filter 1 is attached, the seat plate S (see FIG. 2) is touched with metal. An annular convex portion 36 that restricts the compression amount (crushing allowance) of the gasket 8 is formed on the lower surface. As shown in FIG. 5, the annular convex portion 36 is formed by folding back the raw steel plate in a U-shaped manner (with no gap). An annular peripheral wall portion 37 that surrounds the lower end of the casing 2 is provided outside the annular recess 35, and a locking flange 38 that contacts the lower surface of the outward flange 23 of the casing 2 extends outward from the upper end of the peripheral wall portion 37. It is installed. Further, as shown in FIG. 4, the outer periphery of the set plate 3 (the peripheral wall portion 37 and the locking flange 38) has a rotation-preventing recess (lid-side rotation-preventing portion) 41, a notch 42, and a locking rim portion (lid-side engagement). Stop portions) 43 are formed at three equal angular intervals (120 °) with different angular phases.

  As shown in FIG. 3, the rotation stopper recess 41 is formed with a rectangular cross section in the peripheral wall portion 37 and the locking flange 38, and the rotation stopper protrusion 25 of the casing 2 is fitted when the oil filter 1 is assembled. The notch 42 is formed at the same position as the notch 26 of the casing 2 and has a size through which the locking lug portion 54 of the lock ring 4 passes when the oil filter 1 is assembled.

<Lock ring>
The lock ring 4 is a press-molded product of a relatively thick steel plate, like the set plate 3, and has a polygonal shape whose outer periphery engages with a fastening tool as shown in FIGS. ), An annular wall 52 that is larger in diameter than the tool engaging portion 51 and surrounds the outward flange 23 of the casing 2 and the outer edge of the set plate 3, and the tool engaging portion 51 and the annular shape. It consists of a connecting part (flange pressing part) 53 that connects the wall 52. In the assembled state of the oil filter 1, the lower surface of the connecting portion 53 comes into contact with the upper surface of the outward flange 23 of the casing 2 and presses the outward flange 23 downward. Three locking lugs 54 that engage with the locking rim 43 of the set plate 3 are formed at equal intervals (120 °) at the lower portion of the annular wall 52 so as to protrude inward.

<< Operation of First Embodiment >>
Hereinafter, the operation of the oil filter 1 of the present embodiment will be described using the replacement work of the filter element 5 as an example.
When the automobile (engine) is operated for a predetermined distance or period, the maintenance operator replaces the oil filter 1 with a new one in order to maintain the engine oil filtering function in the lubrication system. In the case of the present embodiment, the used oil filter 1 is collected by an automobile manufacturer or an automobile dealer, and the filter element 5 is exchanged by an exchange operator of a recycling factory or a maintenance factory.

  When replacing the filter element 5, the replacement operator first locks the casing 2 with the hand 2 or a ring spanner while the oil filter 1 is turned upside down in order to prevent spilling of the engine oil. 4 is rotated counterclockwise by a predetermined angle. Then, the engagement between the locking lug portion 54 and the locking rim portion 43 is released, and the lock ring 4 is separated from the set plate 3.

  Next, the replacement operator separates the casing 2 and the set plate 3, drains the engine oil accumulated in the casing 2, and then removes and discards the filter element 5, the gasket 8, and the O-ring 11. Thereafter, the replacement operator cleans the casing 2, the set plate 3, the relief valve 7, etc., and then installs a new gasket 8, O-ring 11, and check valve 12 on the set plate 3.

  Next, the replacement operator attaches the spring 6 and the relief valve 7 to the upper part of the filter element 5, then inserts the filter element 5 into the casing 2, and the position where the rotation prevention convex part 25 fits into the rotation prevention concave part 41. Then, the casing 2 and the set plate 3 are joined together. Thereafter, the replacement operator externally fits the lock ring 4 from the head side of the casing 2 and rotates the lock ring 4 clockwise while being pressed against the set plate 3. Accordingly, the locking lug portion 54 of the lock ring 4 and the locking rim portion 43 of the set plate 3 are engaged again, and the casing 2 and the set plate 3 are fastened via the lock ring 4.

<< Effects of First Embodiment >>
In the oil filter 1 of the present embodiment, since the set plate 3 is a press-formed product of a steel plate, the manufacturing cost and weight of the oil filter 1 can be reduced. Then, the O-ring support wall 34 of the set plate 3 is formed by folding the material steel plate, and the material steel plate is in a close contact state with no gap in the entire folded region. The support rigidity and strength are extremely high, and the sealing performance is improved, and the oil filter 1 can be made compact.

  Further, in the present embodiment, since the drop prevention protrusion 34a is formed on the upper end of the O ring support wall 34, the O ring 11 does not fall off when the oil filter 1 is assembled, and the O ring 11 is pulled out due to engine vibration or the like. No longer happened. As shown in FIG. 6B, the drop-off prevention projection 34a is formed to bulge only at the front end side from the turning point BP of the material steel plate, so that almost no distortion deformation occurs on the seal surface 34b of the O-ring support wall 34. High sealing performance was secured. 9, in the assembled state of the oil filter 1 (that is, when the locking lug portion 54 of the lock ring 4 and the locking rim portion 43 of the set plate 3 are engaged) Since the O-ring 11 is separated, the deformation of the seal surface 34b due to the bulging of the drop-off prevention protrusion 34a hardly reaches the contact portion of the O-ring 11, and higher sealing performance is secured.

  On the other hand, in the present embodiment, the annular convex portion 36 of the set plate 3 is formed by folding the material steel plate, and the material steel plate is in close contact with no gap in the entire folded region, so that it is a press-formed product. The rigidity and strength of the annular convex portion 36 are extremely high, and the compression amount (crushing allowance) of the gasket 8 can be accurately regulated, and the oil filter 1 can be made compact.

[Partial variations]
FIG. 10 is a longitudinal sectional view of an essential part showing an oil filter according to a partial modification of the first embodiment.
In the set plate 3 of a partially modified example, the drop-off prevention protrusion 34a is formed to bulge downward from the turning point BP of the material steel plate. However, in some modifications, since the O-ring 11 has a relatively small cross section, the drop-off prevention protrusion 34a and the O-ring 11 are separated from each other in the assembled state of the oil filter 1, and the drop-off prevention protrusion. The deformation of the seal surface 34b due to the bulging of 34a hardly reached the contact portion of the O-ring 11, and high sealing performance was secured.

[Second Embodiment]
11 is a perspective view showing an oil filter according to the second embodiment, FIG. 12 is a longitudinal sectional view showing the oil filter according to the second embodiment, and FIG. 13 is an exploded perspective view showing the oil filter according to the second embodiment. FIG. 14 is a plan view of the set plate according to the second embodiment, and FIG. 15 is a cross-sectional view taken along the line XV-XV in FIG.
In the second embodiment, as in the first embodiment, the upper side in FIGS. 11 to 13 is the upper side, and the lower side is the lower side.

<< Configuration of Second Embodiment >>
<overall structure>
As shown in FIGS. 11 to 13, the oil filter 1 of the present embodiment has a set plate 3 and a lock ring 4 that are screwed in and has a bottomed cylindrical casing as in the first embodiment. 2, a disc-shaped set plate (lid) 3 that covers the lower end (opening end) of the casing 2, and an annular lock ring 4 that fastens the set plate 3 to the casing 2.

  As shown in FIG. 12, the casing 2 houses a filter element 5, a spring, and a relief valve 7 as in the first embodiment. Further, a gasket 8, a holding ring 10, an O-ring 11 and a check valve 12 are attached to the set plate 3.

<Casing>
As in the first embodiment, the casing 2 is a press-formed product of a thin steel plate. As shown in FIG. 13, the casing 22 has a tool engaging portion 21 formed at the upper end, and the opening end of the barrel 22. And an outward flange 23. The outward flange 23 is formed with three rotation prevention convex portions 25 and three biasing convex portions 27 at equal angular (120 °) intervals with different angular phases. In the case of the second embodiment, the anti-rotation convex portion 25 is formed by cutting and raising the outward flange 23 and extends obliquely downward from the opening end of the body portion 22. Further, the urging convex portion 27 protrudes downward with an arc cross-sectional shape at a substantially intermediate portion between the adjacent non-rotating convex portions 25.

<Set plate>
As in the first embodiment, the set plate 3 is a press-formed product made of a relatively thick steel plate, and as shown in FIGS. 14 and 15, the boss 31 erected upward is the center of the set plate 3. In the department. The boss 31 has, on its inner peripheral surface, a female screw 32 that is screwed into a screw boss B (see FIG. 12) formed on a crankcase or the like, and serves as an engine oil outflow path from the filter element 5 to the engine side. ing. Around the boss 31, eight through holes 33 are formed at equal angular intervals (45 ° intervals), and these through holes 33 serve as an inflow passage of engine oil from the engine side to the filter element 5. Yes.

  Outside the through hole 33, an O-ring support wall 34 that holds the O-ring 11 is provided upright with the inner peripheral surface of the casing 2. As shown in FIG. 15, the O-ring support wall 34 is formed by folding a raw steel plate in an inverted U-shape in close contact (with no gap), as in the first embodiment described above, and further, an O-ring. 11 has an outward drop prevention projection 34a at its upper end to prevent the 11 from slipping out.

  On the lower surface of the set plate 3, on the outside of the O-ring support wall 34, the material steel plate is folded back in close contact with the U-shape (without a gap), so that the seat surface S (see FIG. 12) is attached when the oil filter 1 is attached. An annular convex portion 36 for metal touch is formed.

  An annular locking flange 38 is formed on the outer peripheral side of the set plate 3 so that the urging convex portion 27 of the outward flange 23 abuts. °) are provided at intervals. The anti-rotation recess 41 has a rectangular cross section formed on the locking flange 38, and the anti-rotation protrusion 25 of the casing 2 is fitted when the oil filter 1 is assembled as shown in FIG. An annular coupling wall 45 extends downward from the outer peripheral side of the locking flange 38, and a male screw 46 is formed on the outer peripheral surface of the coupling wall 45 as a lid side locking portion. In this embodiment, the male screw 46 is a single triangular screw, but may be a multi-threaded screw, a square screw or a trapezoidal screw.

<Lock ring>
The lock ring 4 is a press-molded product of a relatively thick steel plate, like the set plate 3, and as shown in FIG. 13, the outer periphery is formed on multiple surfaces (12 surfaces in the illustrated example) that engage with the fastening tool. An annular tool engaging portion 51, an annular wall 52 having a larger diameter than the tool engaging portion 51 and surrounding the outer flange 23 of the casing 2 and the outer edge of the set plate 3, and the tool engaging portion 51 and the annular wall 52 are connected to each other. It consists of a connecting part (flange pressing part) 53 that performs. In the assembled state of the oil filter 1, the lower surface of the connecting portion 53 contacts the upper surface of the outward flange 23 of the casing 2 and presses the outward flange 23 downward, as in the first embodiment. A female thread 56 is formed on the inner peripheral side of the annular wall 52 as a thread portion on the lock ring side. By rotating the lock ring 4 relative to the set plate 3, the female thread 56 is a male thread 46 on the set plate 3 side. Screwed together.

<< Operation of Second Embodiment >>
Hereinafter, the operation of the oil filter 1 of the second embodiment will be described by taking the replacement work of the filter element 5 as an example.
In the case of the second embodiment, when replacing the filter element 5, the replacement operator first uses a hand or a ring spanner with the oil filter 1 turned upside down in order to prevent spillage of the engine oil. The lock ring 4 is rotated counterclockwise with respect to the casing 2. Then, the female screw 56 on the lock ring 4 side and the male screw 46 on the set plate 3 side are separated, and the lock ring 4 is released downward.

  Next, the replacement operator separates the casing 2 and the set plate 3, drains the engine oil accumulated in the casing 2, and then removes and discards the filter element 5, the gasket 8, and the O-ring 11. Thereafter, the replacement operator cleans the casing 2, the set plate 3, the relief valve 7, etc., and then installs a new gasket 8, O-ring 11, and check valve 12 on the set plate 3.

  Next, the replacement operator attaches the spring 6 and the relief valve 7 to the upper part of the filter element 5, and then inserts the filter element 5 into the casing 2. Next, the replacement operator couples the casing 2 and the set plate 3 at a position where the anti-rotation convex portion 25 fits into the anti-rotation concave portion 41. Thereafter, the replacement operator externally fits the lock ring 4 from the head side of the casing 2 and rotates the lock ring 4 clockwise while being pressed against the set plate 3.

  As a result, the female screw 56 on the lock ring 4 side and the male screw 46 on the set plate 3 side are screwed together, and the outward flange 23 of the casing 2 is pressed against the locking flange 38 of the set plate 3 by the connecting portion 53 of the lock ring 4. . Thereafter, the replacement operator uses a torque wrench or the like to fasten the lock ring 4 to the set plate 3 with a predetermined fastening torque, and finishes the work. In the assembled state of the oil filter 1, the biasing projection 27 of the casing 2 is in elastic contact with the locking flange 38, so that rattling between the casing 2 and the set plate 3 is prevented.

<< Effects of Second Embodiment >>
Also in the oil filter 1 of the second embodiment, since the set plate 3 is a press-formed product of a steel plate as in the first embodiment described above, the manufacturing cost and weight of the oil filter 1 can be reduced. Moreover, in the set plate 3, since the O-ring support wall 34 is formed by folding the material steel plate in an inverted U-shape in close contact, the support rigidity of the O-ring 11 is improved while being a press-formed product. In addition to ensuring high sealing performance, the radial dimension of the O-ring support wall 34 was reduced, and the oil filter 1 could be made compact. Further, since the drop-off preventing projection 34a is formed on the upper end of the O-ring support wall 34, the O-ring 11 does not drop off when the oil filter 1 is assembled, and the O-ring 11 does not come off due to engine vibration or the like.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. For example, in the above embodiment, the present invention is applied to an element exchange type oil filter for an automobile engine. However, the present invention can also be applied to an oil filter or a fuel filter used for a marine engine or a general machine. It can also be applied to various containers other than filters. Moreover, in the set plate of the said embodiment, although the O-ring support wall and the cyclic | annular convex part were formed by folding a raw steel plate in the contact | adherence state, you may make it form by folding with a predetermined clearance. In the second embodiment, the external thread is formed on the lid side and the internal thread is formed on the lock ring side. However, the internal thread may be formed on the lid side and the external thread may be formed on the lock ring side. Moreover, as a material of the set plate, a metal plate other than a steel plate such as an aluminum alloy plate may be employed. In addition to the specific shape of the O-ring support wall and drop-off prevention protrusion, the specific shape and material of the casing and lock ring, the molding method, etc., steel forged molded products, aluminum die-cast molded products, resin injection It can be set as appropriate without departing from the spirit of the present invention, such as a molded product.

It is a perspective view which shows the oil filter of 1st Embodiment. It is a longitudinal cross-sectional view which shows the oil filter of 1st Embodiment. It is a disassembled perspective view which shows the oil filter of 1st Embodiment. It is a top view of the set plate which concerns on 1st Embodiment. It is VV sectional drawing in FIG. It is explanatory drawing which shows the formation process of the O-ring support wall which concerns on embodiment. It is a top view of the lock ring concerning a 1st embodiment. It is VIII-VIII sectional drawing in FIG. It is the IX section enlarged view in FIG. It is a principal part longitudinal cross-sectional view which shows the oil filter which concerns on the partial modification of 1st Embodiment. It is a perspective view which shows the oil filter of 2nd Embodiment. It is a longitudinal cross-sectional view which shows the oil filter of 2nd Embodiment. It is a disassembled perspective view which shows the oil filter of 2nd Embodiment. It is a top view of the set plate which concerns on 2nd Embodiment. It is XV-XV sectional drawing in FIG.

Explanation of symbols

1 Oil filter 2 Casing 3 Set plate (lid)
4 Lock ring 5 Filter element 11 O-ring (annular seal)
23 Outward flange 34 O-ring support wall 34a Drop-off prevention projection 36 Annular convex portion 38 Locking flange 43 Locking rim portion (locking ring side locking portion)
46 Male thread (lid side locking part)
53 Connecting part (flange pressing part)
54 Locking lug part (locking ring side locking part)
56 Female thread (Lock ring side locking part)
BP Folding point

Claims (7)

A bottomed cylindrical casing having an outward flange on the outer periphery of the opening end side;
Covering the open end of the casing, and a disk-shaped lid having a lid side locking portion on its outer periphery,
An annular seal that is interposed / supported between an inner peripheral surface of the casing and a seal support wall that is erected on the lid, and performs a seal between the casing and the lid;
An annular lock ring having a flange pressing portion that contacts the end surface of the outward flange and presses the outward flange toward the lid side, and a lock ring side locking portion that engages with the lid side locking portion; With
After the lock ring is externally fitted to the casing from the closed end side of the casing, the lid side lock portion and the lock ring side lock portion are made to rotate by relatively rotating the lid and the lock ring. A lid-separated container that engages or separates,
The lid is a press-formed product made of a metal plate,
The lid separation type container, wherein the seal support wall is formed by folding the metal plate into a U shape.   2. The lid separation type container according to claim 1, wherein a drop-off preventing projection of the annular seal deformed toward the annular seal is bulged and formed at a folded portion of the support wall.   The said drop-off prevention protrusion is formed at a position separated from the annular seal when the lid side locking portion and the lock ring side locking portion are engaged. Lid separation type container.   The lid-separated container according to claim 3, wherein the drop-off prevention protrusion is formed only on a tip side from a turning point of the metal plate.   The lid separation type container according to any one of claims 1 to 4, wherein the metal plate is folded back in a close contact state on the seal support wall. A bottomed cylindrical casing having an outward flange on the outer periphery of the opening end side;
A disc-shaped lid that covers the opening end of the casing, has a lid side locking portion on its outer periphery, and has an annular convex portion on its end surface;
An annular lock ring having a flange pressing portion that contacts the end surface of the outward flange and presses the outward flange toward the lid side, and a lock ring side locking portion that engages with the lid side locking portion; With
After the lock ring is externally fitted to the casing from the closed end side of the casing, the lid side lock portion and the lock ring side lock portion are made to rotate by relatively rotating the lid and the lock ring. A lid-separated container that is attached to the attached device in a state in which the annular convex portion is in contact with the attachment surface of the attached device, while being engaged or separated,
The lid is a press-formed product made of a metal plate,
The said ring-shaped convex part was formed by folding up the said metal plate in U shape, The lid separation-type container characterized by the above-mentioned.   The lid separation type container according to claim 6, wherein the metal plate is folded back in a close contact state in the annular convex portion.

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