JP2011140905A - Filter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a filter device achieving easy welding operation when an interval forming skeleton portion is provided in an intersecting direction from a base welded to a connecting member. <P>SOLUTION: An interval forming member 32 arranged inside of filter material 30 includes the base 36 formed with a circular hole 36A for allowing fuel L to pass through, and the interval forming skeleton portion 38 extending in a direction inclined with respect to the base 36. A planar portion 36B on which an ultrasonic welding horn 50 abuts is formed around the hole 36A of the base 36, and the base 36 is jointed to a connector 34 by welding. The interval forming skeleton portion 38 has a cross-sectional surface formed into a substantially U-shape along the base 36, and an opening 39 is formed along the length direction of the interval forming skeleton portion 38. When the horn 50 abuts on the planar portion 36B, the horn 50 is inserted through the opening 39 of the interval forming skeleton portion 38, and the horn 50 and interval forming skeleton portion 38 do not interfere with each other. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a filter device attached to a fuel suction port in a fuel tank of an automobile or a two-wheeled automobile.

  Fuel in fuel tanks of automobiles and motorcycles is sent to the engine room by a fuel pump, and a filter device for filtering the fuel in the fuel tank is provided at the suction port of the fuel pump. It has been.

  In the fuel filter device described in Patent Document 1 below, a gap forming member and a connector are joined to a gap forming member disposed inside the filter body along a longitudinal direction of the gap forming member through a through hole of the filter body. The interval forming member is provided with an interval forming projection at the lower portion of the bonded portion. In this configuration, a welding jig is brought into contact with the distal end portion of the gap forming protrusion, and the gap forming member and the connector are welded at a position substantially immediately above the gap forming protrusion.

JP 2009-62912 A

  However, in the above-mentioned Patent Document 1, since a gap forming protrusion is provided at the lower part of the joint portion that joins the gap forming member and the connector through the through hole of the filter body, the position of the joint portion is provided. In addition, the shape of the gap forming member is limited, and there is room for improvement.

  In view of the above problems, an object of the present invention is to provide a filter device that facilitates welding work when an interval forming bone portion is provided in a direction intersecting with a base portion to be welded to a connection member.

  The filter device according to the invention of claim 1 is provided with a filter material formed of a bag-shaped filter medium, an interval forming member provided inside the filter material, and forming a space inside the filter material, A flow path portion that communicates the inside and the outside of the filter material, and a connection member that is attached to a fuel suction port, and the gap forming member is formed with a hole portion that communicates with the flow path portion, A base portion that is welded to the connection member with the filter material interposed therebetween, and extends from the flat portion of the base portion in a direction intersecting the flat portion, and a welding jig is brought into contact with the flat portion. And an interval forming bone part that does not interfere with each other.

  According to the first aspect of the present invention, the interval forming member includes the base portion in which the hole portion communicating with the flow path portion of the connecting member is formed, and intersects the flat portion from the flat portion of the base portion. Spacing bones extend in the direction. When the jig for welding is brought into contact with the flat surface portion of the base portion, the gap forming bone portion does not interfere with the jig. For this reason, when welding a base part and a connection member on both sides of a filter material, the bone | frame part for space | interval formation does not become obstructive, and it is easy to weld.

  According to a second aspect of the present invention, in the filter device according to the first aspect, the gap forming bone portion includes a longitudinal bone portion extending in a longitudinal direction from the base portion, and the longitudinal bone portion intersecting the longitudinal bone portion. A transverse bone portion connecting the bone portions, and the jig is inserted from between the longitudinal bone portions without the transverse bone portion.

  According to the second aspect of the present invention, since the welding jig is inserted from between the vertical bone portions without the transverse bone portion of the gap forming bone portion, the welding jig is applied to the flat portion of the base portion. When the tool is abutted, the welding jig does not interfere with the gap forming bone. For this reason, it is easy to perform welding work when welding the base portion and the connection member with the filter material interposed therebetween.

  According to a third aspect of the present invention, in the filter device according to the first or second aspect, the gap forming bone part is inclined with respect to the base part so as to avoid the upper side of the hole part. It is what.

  According to the invention described in claim 3, the gap forming bone portion is inclined with respect to the base portion so as to avoid the upper side of the hole portion, and the welding jig comes into contact with the flat portion of the base portion. When this is done, the welding tool is prevented from interfering with the spacing bone.

  According to a fourth aspect of the present invention, in the filter device according to any one of the first to third aspects, when the gap forming bone portion is separated from the base portion in a plan view, the width increases. It is narrowed.

  According to the invention described in claim 4, when the gap forming bone portion is viewed in plan, the welding jig comes into contact with the flat surface portion of the base portion even if the width is narrowed away from the base portion. When this is done, the welding tool is prevented from interfering with the spacing bone.

  According to a fifth aspect of the present invention, in the filter device according to any one of the first to fourth aspects, the gap forming bone portion has a substantially U-shaped cross section along the planar portion. Is formed.

  According to the fifth aspect of the present invention, the gap forming bone part has a substantially U-shaped cross section along the plane part, and is welded between the substantially U-shaped gap forming bone parts. By inserting the jig, the jig is prevented from interfering with the gap forming bone part when the jig is brought into contact with the flat part of the base part.

  According to a sixth aspect of the present invention, in the filter device according to any one of the first to fifth aspects, the connection member and the base portion are welded with a side portion of the bag-shaped filter material interposed therebetween. It is what has been.

  According to the invention described in claim 6, the welding jig interferes with the gap forming bone portion even in the configuration in which the connecting member and the base portion are welded with the side portion of the bag-shaped filter material interposed therebetween. Is prevented, and workability when welding the base portion and the connecting member is good.

  Since the present invention is configured as described above, when the gap forming bone portion is provided in the direction intersecting from the base portion to be welded to the connecting member, the welding jig does not interfere with the gap forming bone portion and is welded. Easy to work.

It is a schematic sectional drawing which shows the fuel tank provided with the filter apparatus which concerns on one Embodiment of this invention. It is a perspective view showing a filter device concerning one embodiment of the present invention. It is the perspective view which looked at the filter apparatus which concerns on one Embodiment of this invention from another direction. It is a block diagram which shows the space | interval formation member used for the filter apparatus which concerns on one Embodiment of this invention, (A) is a front view, (B) is a side view, (C) is a top view. It is a side view which shows the connector used for the filter apparatus which concerns on one Embodiment of this invention. It is an expanded sectional view showing the state where the interval formation member and connector of the filter device concerning one embodiment of the present invention were welded. It is a perspective view which shows the process of welding the space | interval formation member and connector of the filter apparatus which concern on one Embodiment of this invention. It is an expanded sectional view which shows the process of welding the space | interval formation member and connector of the filter apparatus which concern on one Embodiment of this invention. It is a perspective view which shows the process of forming the filter material of the filter apparatus which concerns on one Embodiment of this invention in bag shape.

  Next, a filter device according to an embodiment of the present invention will be described.

  FIG. 1 is a sectional view of a fuel tank 12 in which the filter device 10 is used. As shown in this figure, a chamber 14 is disposed in a fuel tank 12 provided in a vehicle or the like, and a fuel pump 18 is inclined on a support plate 16 provided on the upper portion of the chamber 14. It is fixed in the state. A supply pipe 22 is connected to the discharge port 20 of the fuel pump 18 so as to supply fuel to an engine room (not shown). The upper portion of the supply pipe 22 is fixed to an attachment member 24 formed on the upper surface of the fuel tank 12.

  A connector 34 (to be described later) of the filter device 10 is connected to the suction port 26 of the fuel pump 18. Thus, when the fuel pump 18 is driven, the fuel L in the fuel tank 12 is sucked and filtered by the filter device 10 and then sent from the connector 34 to the engine room via the fuel pump 18 and the supply pipe 22. It has come to be.

  As shown in FIGS. 2 and 3, the filter device 10 includes a filter material 30 made of a filter material and formed into a bag shape, a resin-made interval forming member 32 provided inside the filter material 30, and a filter material. And a connector 34 as a connecting member that is attached to the outside of 30 and communicates the inside and outside of the filter material 30.

  The space | interval formation member 32 is arrange | positioned in order to form a space inside the bag-shaped filter material 30. FIG. As shown in FIGS. 4A to 4C, the interval forming member 32 is inclined with respect to the base portion 36 in which a circular hole portion 36 </ b> A through which the fuel L passes is formed, and the base portion 36. An interval forming bone 38 extending in the direction (the length direction indicated by the arrow A).

  A flat portion 36B is formed around the hole portion 36A of the base portion 36, and an interval forming bone portion 38 is erected on the flat surface portion 36B at a predetermined interval from the hole portion 36A. The flat surface portion 36B serves as a contact surface with which an ultrasonic welding horn 50 as an example of a welding jig for welding the base portion 36 and the connector 34 is contacted (see FIG. 7). ).

  The interval forming bone portion 38 is formed in a substantially U-shaped cross section along the base portion 36 (planar portion 36B) so as to surround the hole portion 36A of the base portion 36, and the interval forming bone portion 38 is formed. An opening 39 is formed along the length direction. Further, the gap forming bone portion 38 is inclined with respect to the base portion 36 (plane portion 36B) in a direction avoiding the upper side of the hole portion 36A. In other words, the gap forming bone portion 38 extends in the length direction (arrow A direction) inclined with respect to the base portion 36 and extends in the direction (arrow B direction) along the flat portion 36B. An opening 39 is formed on the side of the hole 36 </ b> A of the base portion 36 in the bone portion 38. The opening 39 of the gap forming bone portion 38 is formed at a position where the horn 50 can be inserted through the opening 39 when the tip portion 50A of the substantially cylindrical horn 50 is brought into contact with the flat surface portion 36B. Thus, the side surface portion 50B in the longitudinal direction of the horn 50 is prevented from interfering with the gap forming bone portion 38. The horn 50 is a low-amplitude horn having a long thin portion.

  As shown in FIG. 2 to FIG. 4, more specifically, a plurality of the bone forming bone portions 38 are arranged in the length direction (arrow A direction) inclined with respect to the base portion 36 (this embodiment). 4) vertical bone portions 38A, and a plurality of (5 in this embodiment) horizontal bone portions 38B arranged at predetermined intervals in a direction orthogonal to the vertical bone portion 38A and connecting the vertical bone portions 38A. An opening 38C is formed at a position surrounded by the vertical bone 38A and the horizontal bone 38B. As a result, the fuel filtered by the filter material 30 can pass through the plurality of openings 38 </ b> C of the gap forming bone portion 38. Further, an opening 39 along the length direction of the space forming bone 38 is formed between the longitudinal bones 38A of the space forming bone 38 where there is no transverse bone 38B. Further, the interval forming bone portion 38 is formed so as to become narrower as the distance from the base portion 36 increases (thinner becomes narrower toward the distal end in the length direction of the interval forming bone portion 38).

  As shown in FIG. 6, the opposite side of the base portion 36 from the flat surface portion 36B is a joint portion 36C to be joined to the connector 34. The joint portion 36C has an annular recess around the hole portion 36A. 40 and 42 are formed.

  As shown in FIGS. 5 and 6, the connector 34 is formed of a tubular body having a flow path portion 34 </ b> A through which the fuel L passes, and has a substantially L-shaped cross section along the longitudinal direction. A flange 34B is provided at one end of the connector 34, and an upper surface portion of the flange 34B serves as a joining portion 34C joined to the joining portion 36C of the base portion 36. The inner diameter of the flow path portion 34 </ b> A is formed substantially the same as the inner diameter of the hole portion 36 </ b> A of the base portion 36. The other end of the connector 34 is provided with a connection portion 34 </ b> D connected to the suction port 26 of the fuel pump 18. The connection portion 34D is formed with a circular connection port 34E communicating with the flow path portion 34A.

  Around the flow path portion 34A in the joint portion 34C of the connector 34, annular projections 44 and 46 are provided that fit into the concave portions 40 and 42 formed in the joint portion 36C of the base portion 36, respectively. The concave portion 42 of the base portion 36 and the protrusion 44 of the connector 34 are fitted with the filter material 30 interposed therebetween. The joining portion 36C of the base portion 36 and the joining portion 34C of the connector 34 are welded by ultrasonic welding using a horn 50 described later.

  As shown in FIG. 6, the filter material 30 includes a through hole 30 </ b> C communicating with the hole 36 </ b> A of the base portion 36 and the flow path portion 34 </ b> A of the connector 34. That is, the joining portion 36C of the base portion 36 and the joining portion 34C of the connector 34 are integrated by welding with the peripheral edge portion of the through hole 30C of the filter material 30 sandwiched in part in the radial direction. As shown in FIGS. 2 and 3, the filter material 30 is folded in two on both sides of the base portion 36, and the upper surface portion 30 </ b> A and the lower surface portion 30 </ b> B ( 9). And the filter material 30 is formed in the bag shape by welding the three outer edge parts of the upper surface part 30A and the lower surface part 30B of the filter material 30 in the circumference | surroundings of the bone | frame part 38 for space | interval formation. The filter material 30 is formed in a substantially trapezoidal shape in which the distal end side of the gap forming bone portion 38 is tapered in plan view.

  In addition, as a filter medium which comprises the filter material 30, the synthetic resin mesh, a woven fabric, a knitted fabric, and a nonwoven fabric sheet-like thing are used, for example. Moreover, what superposed | stacked one or more of these sheet-like filter media on 2 or more sheets is used.

  In the filter device 10 of the present embodiment, a bag-like shape is disposed on the end side in the length direction (arrow A direction) of the interval forming bone 38 and around the interval forming bone 38 in a plan view. A connector 34 is attached to a side portion of the filter material 30 in the longitudinal direction (side to the upper surface portion 30A of the filter material 30).

  As shown in FIG. 6, in a state where the joining portion 36 </ b> C of the base portion 36 and the joining portion 34 </ b> C of the connector 34 are integrated by welding, the hole portion 36 </ b> A of the base portion 36 through the through hole 30 </ b> C of the filter material 30. And the flow path portion 34A of the connector 34 communicate with each other so that fuel can pass through the hole 36A and the flow path portion 34A. The fuel filtered by the filter material 30 is sucked into the fuel pump 18 from the suction port 26 through the hole 36A and the flow path 34A (see FIG. 1).

  Next, the operation of the filter device 10 of the present embodiment will be described.

  As shown in FIG. 7, when the joining portion 36C of the base portion 36 and the joining portion 34C of the connector 34 are joined by welding, the joining portion 36C of the base portion 36 and the joining portion 34C of the connector 34 are interposed. A substantially rectangular film-shaped filter material 30 is interposed, and the positions of the hole portion 36A of the base portion 36, the through hole 30C of the filter material 30 and the flow path portion 34A of the connector 34 are aligned (see FIG. 6). Then, the concave portions 40 and 42 of the base portion 36 and the projections 44 and 46 of the connector 34 are fitted, respectively, so that the positions of the joint portion 36C of the base portion 36 and the joint portion 34C of the connector 34 do not shift. At this time, the filter material 30 is interposed between the recess 42 of the base portion 36 and the protrusion 46 of the connector 34.

  In this state, as shown in FIGS. 7 and 8, the tip portion 50 </ b> A of the substantially cylindrical horn 50 is brought into contact with the flat portion 36 </ b> B of the base portion 36. At this time, the side surface 50B side of the horn 50 is inserted through the opening 39 of the gap forming bone 38, and the side wall 50B of the horn 50 and the gap forming bone 38 do not interfere with each other. Further, a bifurcated tip 52A provided on the anvil 52 is inserted below the flange 34B of the connector 34 and is brought into contact with the lower surface of the flange 34B. In this state, as shown in FIG. 6, the joining portion 36C of the base portion 36 and the joining portion 34C of the connector 34 are welded by ultrasonic welding, and the joining portion 36C of the base portion 36 and the joining portion 34C of the connector 34 are connected. Integrated.

  Thereafter, as shown in FIG. 9, the rectangular filter material 30 is bent on both sides of the base portion 36, and the upper surface portion 30 </ b> A on one end side of the filter material 30 and the lower surface on the other end side of the filter material 30. The part 30B is overlaid. Further, the upper edge portion 30A and the lower face portion 30B of the filter material 30 are welded in a substantially U shape with the tip tapered in a plan view around the gap forming bone portion 38, and the filter material 30 is welded. The filter device 10 is completed by cutting and adjusting the shape.

  In this filter device 10, the hole 36 </ b> A of the base portion 36 and the flow path portion 34 </ b> A of the connector 34 communicate with each other via the through hole 30 </ b> C of the filter material 30, and the fuel filtered by the filter material 30 is used for forming a gap. It passes through the plurality of openings 38C of the bone portion 38 and passes through the hole portion 36A of the base portion 36 and the flow path portion 34A of the connector 34. Then, the fuel is sucked into the fuel pump 18 through the suction port 26 from the flow path portion 34A of the connector 34 (see FIG. 1).

  In such a filter device 10, when the front end portion 50A of the horn 50 is brought into contact with the flat surface portion 36B of the base portion 36, the side surface portion 50B side of the horn 50 is inserted through the opening 39 of the gap forming bone portion 38, The side surface portion 50B of the horn 50 and the gap forming bone portion 38 do not interfere with each other. For this reason, the gap forming bone portion 38 does not get in the way during the welding operation of welding the joint portion 36C of the base portion 36 and the joint portion 34C of the connector 34, and the workability is good.

  Further, even when the gap forming bone portion 38 is narrower as it is away from the base portion 36, the gap forming bone portion 38 is provided with an opening 39 having no transverse bone portion 38B along the length direction. It is possible to more effectively prevent the horn 50 and the gap forming bone portion 38 from interfering with each other.

  Moreover, in this filter apparatus 10, since the space | interval formation member 32 and the connector 34 are not formed by insert molding, there is no push cut part which presses a nonwoven fabric strongly on a metal mold | die, the loss of an effective filtration area decreases, and if it is the same projection area, it will be small. Can be realized. Moreover, it becomes possible to assemble the filter apparatus 10 in a clean room, the adhesion of foreign matters and the like are reduced, and the cleanness is increased.

  In the present embodiment, the gap forming bone portion 38 has a substantially U-shaped cross section in the direction (arrow B direction) along the plane portion 36B. The bone part 38 may be changed to other shapes. For example, the gap forming bone part may have a substantially “U” -shaped or substantially V-shaped cross section in the direction along the plane part 36B (in the direction of arrow B), and the two plate-like members may be substantially parallel or substantially parallel. A configuration arranged in a letter “C” may be used. In other words, the gap forming bone portion is provided with an insertion portion for inserting a welding jig along the length direction intersecting the base portion 36, and prevents interference with the welding jig. Good.

  In the present embodiment, the gap forming bone portion 38 is formed so as to be inclined with respect to the base portion 36 so as to avoid the upper side of the hole portion 36A. However, it may be provided in the gap forming bone portion so as to cross in the other direction. Further, an interval forming bone portion may be provided in a direction orthogonal to the base portion 36.

  In the present embodiment, the interval forming bone portion 38 is formed so that the width becomes narrower (the tip becomes narrower) as the distance from the base portion 36 increases. However, the interval forming bone portion 38 is not limited thereto. A configuration in which the outer shape in the length direction (arrow A direction) is formed to be substantially the same size, or a configuration in which the tip side is thickened may be used.

  In this embodiment, the ultrasonic welding horn 50 is brought into contact with the flat surface portion 36B to weld the joint portion 36C of the base portion 36 and the joint portion 34C of the connector 34. However, the present invention is not limited to ultrasonic welding. Further, jigs such as high frequency welding, vibration welding, laser welding, and spin welding may be brought into contact with the flat surface portion 36B for welding.

DESCRIPTION OF SYMBOLS 10 Filter apparatus 12 Fuel tank 18 Fuel pump 26 Suction port 30 Filter material 30C Through-hole 32 Space | interval formation member 34 Connector (connection member)
34C Joint part 36 Base part 36A Hole part 36B Plane part 36C Joint part 38 Spacing part bone part 39 Opening 50 Horn (welding tool)
52 Anvil (welding tool)

Claims (6)

A filter material formed of a bag-shaped filter medium;
An interval forming member provided inside the filter material, and forming a space in the filter material;
A flow path portion communicating between the inside and the outside of the filter material, and a connection member attached to a fuel suction port,
The gap forming member is
A hole portion that communicates with the flow path portion is formed, and a base portion that is welded to the connection member with the filter material interposed therebetween,
A filter device comprising: a gap forming bone portion that extends in a direction intersecting with the planar portion from the planar portion of the base portion and does not interfere when a welding jig is brought into contact with the planar portion. The gap forming bone part includes a longitudinal bone part extending in the longitudinal direction from the base part, and a transverse bone part that intersects the longitudinal bone part and connects the longitudinal bone part,
The filter device according to claim 1, wherein the jig is inserted from between a longitudinal bone portion without the transverse bone portion.   The filter device according to claim 1, wherein the gap forming bone portion is inclined with respect to the base portion so as to avoid an upper side of the hole portion.   The filter device according to any one of claims 1 to 3, wherein the gap forming bone portion is narrower in width as it is separated from the base portion in plan view.   The filter device according to any one of claims 1 to 4, wherein the gap forming bone portion has a substantially U-shaped cross section along the flat surface portion.   The filter device according to any one of claims 1 to 5, wherein the connection member and the base portion are welded with a side portion of the bag-shaped filter material interposed therebetween.

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