JP4875343B2 - Cylindrical storage member closure structure - Google Patents

Description

  The present invention closes an opening of a cylindrical storage member in which a component such as a fuel pump is stored and disposed inside a hollow cylindrical body using a cylindrical closing member, and stores the component in the cylindrical storage member The present invention relates to a closed structure of a cylindrical storage member.

Conventionally used cylindrical housing member closing structures are shown in FIGS.
13 is a side view thereof, and FIG. 14 is a longitudinal sectional view taken along line AA of FIG.
Reference numeral 60 denotes a cylindrical storage member that has a cylindrical shape and opens with a lower end 60a.
A locking projection 60d is formed in the vicinity of the lower end of the outer periphery 60c of the cylindrical housing member 60, and the locking projection 60d is directed upward U and its outer diameter 60e gradually increases. An inclined wall surface is formed, and at the upper end thereof, a locking step portion 60f that faces the upper portion U and forms a flat shape is formed.
On the other hand, 61 is a cylindrical closing member having a bottomed cup shape that closes the opening 60b of the lower end 60a of the cylindrical storage member 60. Both side surfaces are notched by the notch groove 61b from the outer periphery of the bottom 61a. The formed locking piece portion 61c is formed to extend upward U. The cylindrical blocking member 61 is made of a synthetic resin material so that the locking piece 61c can be elastically deformed.
The locking piece 61c is formed with a locking hole 61d from the bottom 61a upward U, and a locking step portion having a flat shape at the upper end of the locking hole 61d. 61e is formed.
According to the above, the locking piece portion 61c above the locking hole 61d is formed with the locking portion 61f, and the locking step portion 61e is formed on the bottom 61a of the lower portion D at the lower end of the locking portion 61f. It will be formed.
In addition, the inner diameter of the other cylinder part that is not formed by the notch piece 61 c and the notch groove 61 b is slightly larger than the outer diameter of the cylindrical storage member 60.

And the opening part 60b of the lower end 60a of the cylindrical storage member 60 is obstruct | occluded with the cylindrical obstruction | occlusion member 61 as follows.
The bottom 61a of the cylindrical closure member 61 is disposed facing the opening 60b at the lower end 60a of the cylindrical storage member 60. Next, the inner periphery of the locking piece 61c including the cylindrical portion of the cylindrical closure member 61 is the cylinder. It faces the outer periphery 60c of the shape storage member 60 and is inserted upward.
According to the above, the inner periphery of the locking portion 61f of the cylindrical closing member 61 moves upward U while contacting the inclined wall surface of the locking projection 60d of the cylindrical storage member 60. The piece portion 61c moves upward U while expanding outward, and the locking step portion 61e of the locking portion 61f of the cylindrical closing member 61 gets over the locking step portion 60f of the cylindrical storage member 60. In this state, the locking projection 60d of the cylindrical housing member 60 enters the locking hole 61d, and the locking piece 61c of the cylindrical closing member 61 returns to the original position again by its own elastic restoring force. Thus, the expansion by the locking projection 60d is released, whereby the locking step portion 61e of the cylindrical closing member 61 comes into contact with the locking step portion 60f of the locking projection 60d of the cylindrical storage member 60 and is locked. Is done.
Such a state is shown in FIGS.
According to the above, the downward movement of the cylindrical closing member 61 is blocked by the locking of the locking steps 61e and 60f, and the upward movement is blocked by the bottom 61a and the lower end 60a. The opening 60 b at the lower end 60 a of the cylindrical storage member 60 is closed by the cylindrical closing member 61.

According to such a conventional closure structure of the cylindrical storage member, the cylindrical closure member is attached and fixed to the cylindrical storage member by utilizing the elastic variation of the locking piece formed on the cylindrical storage member. The cylindrical closing member is made of a synthetic resin material that is allowed to be elastically deformed.
Here, when the cylindrical closing member formed of such a synthetic resin material receives a large vibration, the locking piece portion moves outward, and the locking step portion of the cylindrical storage member and the cylindrical closing member There is a possibility that the catching with the locking step portion of the shaft will be reduced.
Further, when such a cylindrical closing member is immersed in a liquid and disposed, there is a possibility that the catch between each stop step portion will be reduced due to the swelling of the locking piece.
Here, in order to solve the problem, it is conceivable to increase the thickness of the locking piece portion to increase the rigidity of the locking piece portion. Mounting resistance increases, which is not preferable for assembly.
On the other hand, it is considered that the material of the cylindrical closing member is selected according to the liquid to be immersed in order to eliminate the swelling due to the liquid of the locking piece portion. It is necessary to do so, and a single cylindrical blocking member cannot be used in common, and versatility is hindered.

  The closed structure of the cylindrical storage member according to the present invention is made in view of the above problems, and the object is to have high vibration resistance and simply maintain the initial locked state against liquid immersion. Another object of the present invention is to provide a highly versatile fixing structure capable of stably and reliably closing an opening of a cylindrical housing member over a long period of time.

In order to achieve the above object, the present invention provides a cylindrical storage member that closes the opening by engaging a cylindrical closure member having a bottomed cup shape with a cylindrical storage member having an opening at the lower end. In the occlusion structure of
The cylindrical storage member protrudes from the outer peripheral surface of the lower end portion thereof, and has a locking projection having an upward locking step portion, and protrudes from the outer peripheral surface of the cylindrical storage member above the locking step portion. And a regulating piece portion bent toward the locking step portion side so as to form a regulating groove that opens downward between the outer peripheral surface of the cylindrical storage member,
On the other hand, a cylindrical closing member formed of a synthetic resin material and having a bottomed cup shape includes a pair of elastically deformable insertion pieces extending upward from the outer periphery of the bottom portion, and an intermediate portion between the two insertion piece portions. A locking portion formed so as to connect the portions to each other, and a locking hole surrounded by the locking portion and the both insertion piece portions below the locking portion and having an upper end edge as a downward locking step portion An insertion hole surrounded by the locking portion and the insertion piece portions above the locking portion,
The locking protrusion and the locking portion are engaged when the cylindrical closing member is fitted to the outer periphery of the cylindrical storage member so as to close the opening of the cylindrical storage member at the bottom thereof. When the diameter of the locking projection is increased, the locking projection is introduced into the locking hole and the upward locking step portion of the locking projection is locked. It is formed so as to contact and lock the downward locking step of the hole,
The both insertion pieces are inserted into the restricting groove at an initial stage of fitting the cylindrical closing member to the cylindrical storage member before the expansion of the locking portion by the locking protrusion is started. The first feature is that it is formed so that the insertion proceeds until the locking projection is introduced into the locking hole.

  According to the present invention, in addition to the first feature, the outer peripheral shape of the locking projection is an upward inclined wall surface having an upward angle in which the outer diameter gradually increases from below to above, while the locking protrusion In the initial stage of fitting, the inner peripheral shape of the part is an upward inclined wall surface having an upward angle in which the inner diameter gradually increases from below to above, and the cylindrical closing member is fitted to the outer periphery of the cylindrical storage member. The upward inclined wall surface of the locking portion is brought into contact with the upward inclined wall surface of the locking protrusion without undergoing a diameter expansion deformation, and the cylindrical closing member is fitted to the cylindrical storage member more than the initial stage of the fitting. When the upwardly inclined wall surface of the locking portion is expanded and deformed, the locking protrusion is introduced into the locking hole by sliding over the upwardly inclined wall surface of the locking protrusion and overcoming it. The upward locking step portion of the locking projection is below the locking hole. Contact the Kinogakari ledge portion, a second feature in that as locking.

Furthermore, in addition to the first feature, the present invention has a third feature in that a pair of the regulation piece portions facing each other are provided on the outer peripheral surface of the cylindrical storage member.

In addition to the first feature, the present invention provides an internal combustion engine for an internal combustion engine in which a fuel pump P is housed and disposed inside the tubular housing member, and the fuel pump P enters the fuel tank through an opening of the fuel tank. As a pump housing cylinder constituting the fuel pump unit device,
The cylindrical closing member is a pump holder that is disposed in the fuel tank, faces the lower end of the fuel pump that is disposed in the pump storage cylinder, and closes the opening at the lower end of the pump storage cylinder. This is the fourth feature.

According to the first feature of the present invention, in the state where the cylindrical closing member closes the opening at the lower end of the cylindrical storage member and is fixed to the cylindrical storage member, the locking projection of the cylindrical storage member is a cylinder. Inserted into the locking hole of the cylindrical closing member, the locking step of the locking protrusion of the cylindrical storage member and the locking step of the locking portion of the cylindrical closing member are brought into contact and locked, Further, the insertion piece of the cylindrical closing member is inserted into the restriction groove of the cylindrical storage member.
According to the above, when the cylindrical closing member receives great vibration and the inertial force causes the insertion piece portion to expand outward, the outward movement of the insertion piece portion is in the cylindrical storage member. Since it is prevented from coming into contact with the restricting piece portion that forms the restricting groove, it is possible to maintain a good initial locked state without reducing the catching by both engaging step portions.
Further, even when such a cylindrical closing member is immersed in the liquid and the inserted piece swells and tries to expand outward, the restricting piece prevents the outward expansion. The initial good locking state can be maintained in any liquid immersion state without selecting the synthetic resin material constituting the cylindrical closing member one by one. That is, it is possible to provide a closed structure with excellent vibration resistance and liquid immersion properties.
In addition, the cylindrical closure member is fitted to the cylindrical storage member so that the engagement portion of the cylindrical closure member is brought into contact with the engagement protrusion of the cylindrical storage member without expanding and deforming outward. In the initial stage, since the upper end of the insertion piece portion begins to be inserted into the restriction groove of the cylindrical storage member, even if the insertion piece portion is expanded outwardly during the subsequent movement of the cylindrical closure member, the insertion piece The insertion piece portion can be securely stored and held in the restriction groove without the portion being escaped from the restriction groove.
In addition, according to the present invention, since it is not necessary to increase the rigidity of the insertion piece portion provided with the locking portion, the mounting property of the cylindrical closing member to the cylindrical storage member is not hindered, and a special assembly tool Therefore, it is possible to maintain a good assembling property.
Furthermore, since the number of parts need only be two parts, a cylindrical housing member and a cylindrical closing member, as in the conventional case, an increase in the number of parts can be suppressed, and an increase in parts cost and an increase in assembly man-hours can be suppressed. .

According to the second feature of the present invention, the outer peripheral shape of the locking projection of the cylindrical storage member is formed on the upward inclined wall surface having an upward angle, while the inner peripheral shape of the locking portion of the cylindrical closing member Is formed as an upward inclined wall surface having the upward angle, and the upward inclined wall surface of the locking portion is subjected to expansion deformation at an initial stage of fitting the cylindrical closing member to the outer periphery of the cylindrical storage member. Without touching, and when the fitting of the cylindrical closing member to the cylindrical storage member is advanced more than the initial stage of the fitting, the upward inclined wall surface of the locking part is When the diameter of the locking projection is increased, the locking projection is introduced into the locking hole by sliding over the upward inclined wall surface of the locking projection, and the locking projection is locked upward. Since the step is abutted and locked to the downward locking step of the locking hole, the cylindrical closure In the initial insertion stage for the tubular housing member of wood, the force of the expansion direction does not act against the insertion piece portion of the tubular closure member. That is, there is no insertion resistance of the cylindrical closing member.
According to the above, in the initial insertion stage of the cylindrical closing member, the locking portion of the cylindrical closing member can be accurately placed on the locking protrusion of the cylindrical storage member without requiring skill, and the cylindrical closing member The locking portion of the member can be accurately inserted along the locking protrusion of the cylindrical storage member, and thereafter, the insertion piece portion can be expanded unreasonably and stably.

Further, according to the third feature of the present invention, since the pair of restricting pieces facing each other is provided on the outer peripheral surface of the cylindrical storage member, the cylindrical storage member is injection molded using aluminum or a synthetic resin material. When doing so, the said restriction piece part can be easily cast and formed, and a cylindrical storage member provided with this restriction piece part can be manufactured at low cost.

Furthermore, according to the fourth feature of the present invention, a cylindrical housing member is used as a pump housing body of a fuel pump unit device for supplying fuel to an internal combustion engine, and a pump holder for closing a lower end opening of the pump housing body. Since the cylindrical closing member is used, when the fuel pump unit device constituted by such a cylindrical storage member and the cylindrical closing member is suspended in the fuel tank, it is inserted by the gasoline stored in the fuel tank. The part is swollen so that the insertion piece can be reliably disposed in the regulation groove, and the catch of each locking step of the cylindrical storage member and the cylindrical closing member is not reduced, and during operation of the engine Even when large vibrations act on the cylindrical closing member constituting the fuel pump unit device, the insertion piece can be reliably disposed in the restriction groove, and the catch of each locking step can be reduced. Absent.
Thus, gasoline is particularly used as fuel, and it is suitable for use in fuel pump units used in automobiles and motorcycles that generate significant vibrations during engine operation.

Hereinafter, an embodiment of a closed structure of a cylindrical storage member according to the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a cylindrical storage member constituting the present invention. 2 is a longitudinal sectional view taken along line BB in FIG. FIG. 3 is a lower plan view of FIG.
The cylindrical storage member 1 is configured by the following. (In the following description, it is simply referred to as a storage member.)
The cylindrical storage member 1 preferably has a cylindrical shape, and an opening 1a of a hole penetrating the inside in the vertical direction opens at the lower end 1b.
Reference numeral 2 denotes a locking protrusion formed on the outer periphery 1c in the vicinity of the lower end 1b. The locking protrusion 2 has an outer diameter C that gradually increases from the lower D toward the upper U with an upward angle X. An inclined wall surface 2a is provided, and an upper end of the inclined wall surface 2a is formed with a locking step portion 2b that faces upward and is flat.
A plurality of the locking projections 2 are provided on the outer periphery 1c, and in this example, a pair (two) of the locking projections 2 facing each other on the outer periphery of the cylindrical storage member 1 is provided.
Reference numeral 3 denotes a regulating piece formed on the outer periphery 1c of the storage member 1 with a gap E and above the locking step 2b and facing the locking projection 2, and its lower end 3a is locked Heading toward the protrusion 2.
Thus, a restriction groove 4 having a gap E is formed between the outer periphery 1 c of the storage member 1 and the inner periphery of the restriction piece 3, and this restriction groove 4 faces at least the locking protrusion 2. , The lower end 3a of the restriction piece 3 is opened.
Further, the width W of the restricting piece 3 is formed larger than the width F of the locking projection 2.
The restricting piece 3 is formed corresponding to the locking projection 2, and in the present embodiment, it is formed as a pair facing each other on the outer periphery of the cylindrical storage member 1.

Reference numeral 5 denotes a cylindrical closing member, which is formed as follows. (Simply referred to as a closing member in the following description).
FIG. 4 is a side view of the closing member. FIG. 5 is a longitudinal sectional view taken along line GG in FIG. It is.
The closing member 5 has a bottomed cup shape having a bottom portion 5a, and is formed by extending a pair of insertion piece portions 6 from the bottom portion 5a toward the upper U. Both sides of the insertion piece portion 6 are notched grooves 5b. And is cantilevered by the bottom 5a.
The two insertion pieces 6 are integrally connected to each other through a locking portion 7 at an intermediate portion, and are surrounded by the locking portion 7 and the two insertion pieces 6 below the locking portion 7. 8 is formed, and the locking projection 2 of the storage member 1 can be inserted into the locking hole 8. At the upper end of the locking hole 8, there is formed a locking step 8a that faces the bottom 5a and has a flat shape. Further, an insertion hole 9 is formed by being surrounded by the locking portion 7 and the insertion piece portions 6 above it. The insertion hole 9 has an open upper end so that the locking protrusion 2 of the storage member 1 can be inserted.
The insertion piece 6 is disposed corresponding to the locking projection 2 of the storage member 1 and is formed as a pair in the present example.
The insertion piece 6 of the closing member 5 is required to be elastically deformed. For this purpose, the closing member is made of a synthetic resin material such as PA66.
Furthermore, an inclined wall surface 7 a is formed on the inner peripheral surface of the locking portion 7 and has an upward angle X that is substantially the same as the inclined wall surface 2 a of the locking protrusion 2 of the storage member 1.
Specifically, the inner diameter H of the inclined wall surface 7a is directed from the lower side D to the upper side U, and the inner diameter H gradually increases with substantially the same size as the outer diameter C of the inclined wall surface 2a of the locking projection 2 of the storage member 1. Formed.

The opening 1a below the storage member 1 is closed and fixed by the closing member 5 as follows.
6 and 7 show an initial state of fitting the closing member 5 to the storage member 1, FIG. 6 is a side view in the initial state, and FIG. 7 is a longitudinal sectional view taken along line YY in FIG. .
The bottom portion 5a of the closing member 5 is arranged facing the opening 1a at the lower end 1b of the storage member 1, and in this state, the closing member 5 is fitted to the outer periphery of the storage member 1 facing upward U.
According to the above, the locking projection 2 of the storage member 1 enters the insertion hole 9 formed between the pair of insertion pieces 6 of the closing member 5 and on the outer periphery of the locking projection 2 of the storage member 1. The inclined wall surface 7a formed on the inner periphery of the locking portion 7 of the closing member 5 is disposed in contact with the formed inclined wall surface 2a. At this stage, the upward angle X of the inclined wall surface 2 a of the locking protrusion 2 of the storage member 1 and the upward angle X of the inclined wall surface 7 a of the locking portion 7 of the closing member 5 are formed to be the same angle X. The locking part 7 including the piece part 6 does not expand outward.
On the other hand, in the initial fitting state, the upper end 6a of the insertion piece 6 of the closing member 5 starts to be inserted into the restriction groove 4, and the locking portion 7 including the insertion piece 6 is outward as described above. Therefore, the insertion piece 6 can be accurately inserted into the restriction groove 4.
In addition, according to the above, since the outward pressing force does not act on the locking portion 7 of the closing member 5 by the locking protrusion 2 of the storage member 1 in the initial fitting state, the closing member 5 Can be smoothly inserted into the storage member 1 without insertion resistance, and the locking portion 7 can be reliably disposed on the locking protrusion 2.

Next, the middle state of the fitting in which the closing member 5 further deepens the fitting to the storage member 1 from the initial state of fitting the closing member 5 to the storage member 1 will be described with reference to FIGS.
FIG. 8 is a side view in the middle state of fitting, and FIG. 9 is a longitudinal sectional view taken along line JJ of FIG. In the middle state of the closing of the closing member 5, the inclined wall surface 7 a of the locking portion 7 of the closing member 5 slides and moves upward on the inclined wall surface 2 a of the locking protrusion 2 of the storage member 1. The part 7 is expanded outward by the locking protrusion 2.
As described above, the locking part 7 is expanded outwardly because the locking part 7 is formed in the insertion piece part 6 that is cantilevered by the bottom part 5a, and the closing member 5 is made of a synthetic resin material. By being formed by.
On the other hand, even in the insertion piece portion 6, the engagement portion 7 is expanded so as to expand outward. However, in the initial insertion state of the closing member 5, the insertion piece portion has already been inserted. Since the upper end 6 a of 6 is inserted into the restriction groove 4, the insertion piece 6 does not escape from the restriction groove 4, and is stably and reliably disposed in the restriction groove 4.

Next, an end-of-fitting state in which the fitting of the closing member 5 to the storage member 1 further proceeds from the middle-fitted state of the closing member will be described with reference to FIGS.
FIG. 10 is a side view in a final fitting state. 11 is a longitudinal sectional view taken along the line KK of FIG.
In the final fitting state of the closing member 5, the locking step portion 8 a of the locking portion 7 of the closing member 5 (in other words, the lower end of the locking portion 7) is the locking step of the locking protrusion 2 of the storage member 1. In the state where it abuts against the portion 2b (in other words, the upper end of the locking projection 2), it expands most outward, and then the locking step 8a gets over the locking step 2b. The expansion force of the portion 7 is removed, and the original portion is returned to the original position again by the elastic force of the insertion piece 6, whereby the locking step portion 8 a of the closing member 5 and the locking step portion 2 b of the storage member 1 are in surface contact. And is locked.
On the other hand, in this state, the locking protrusion 2 of the storage member 1 is disposed so as to enter the locking hole 8 of the closing member 5, and the insertion piece 6 is still disposed so as to enter the restriction groove 4. .
Thus, the opening 1a at the lower end 1b of the storage member 1 is closed by the closing member 5 locked to the storage member 1 with the locking steps 2b and 8a, and the closing of the opening 1a of the storage member 1 is completed. To do.

  According to the above, the escape in the downward direction D of the closing member 5 is locked by the locking step portion 8a of the locking portion 7 coming into contact with the locking step portion 2b of the locking protrusion 2 of the storage member 1. On the other hand, the movement of the closing member 5 in the upward direction U is caused by the bottom 5a of the closing member 5 coming into contact with the lower end 1b of the storage member 1, or the upper end 6a of the insertion piece 6 is the upper bottom 4a of the restriction groove 4. Is prevented by contacting the

Here, when a large vibration is applied to the closing member 5 (including the storage member 1), the insertion piece portion 6 of the closing member 5 including the locking portion 7 receives the inertial force and swings to the side. However, according to the present invention, the upper portion including the upper end 6a of the insertion piece portion 6 is disposed so as to enter the restriction groove 4 and its lateral movement is prevented by the restriction piece portion 3. The engagement between the engaging step 8a and the engaging step 2b of the storage member 1 does not decrease, the initial engagement state can be maintained well, and the closing member 5 can be stably and reliably provided. Can be fixed to the storage member 1.
Further, since it is not necessary to increase the rigidity of the locking portion 7, the mounting operation of the closing member 5 to the storage member 1 can be performed very easily, and a new one for maintaining the hooking of the locking step portion. It does not require a member.
Further, when the closing member 5 (including the storage member 1) is immersed in the liquid, the insertion piece 6 of the closing member 5 formed of a synthetic resin material may swell and expand outward. However, even in such a state, the upper side including the upper end 6a of the insertion piece 6 is disposed so as to enter the restriction groove 4 and its lateral movement is prevented by the restriction groove 3, so that it is locked as described above. The blocking member 5 can be fixed to the storage member 1 in a favorable and reliable manner without reducing the catch between the stepped portion 8a and the locking stepped portion 2b.
Thus, there is no need to select a synthetic resin material constituting the closing member 5 according to the liquid to be immersed, and a single closing member can be used for various kinds of storage members. Therefore, the manufacturing cost and management cost can be greatly reduced.

The outer peripheral shape of the inclined wall surface 2 a of the locking projection 2 of the storage member 1 is an upward inclined wall surface in which the outer diameter C gradually increases with an upward angle X from the lower side D to the upper side U. The inner peripheral shape of the stopper portion 7 is the same angle X as the upward angle X, and is an upward inclined wall surface whose inner diameter H gradually increases from the lower part D to the upper part U. Since the pressing force by the locking projection 2 of the storage member 1 does not act on the locking portion 7 of the closing member 5 in the initial fitting state, the insertion of the closing member 5 into the storage member 1 is extremely easy. And the latching | locking part 7 can be correctly arrange | positioned to the latching protrusion 2. FIG.
Further, in the initial fitting state of the closing member 5, the upper end 6a of the insertion piece 6 is inserted and arranged in the restriction groove 4, so that the closing member 5 can be reliably inserted in the middle and final fitting states thereafter. In addition, the insertion piece 6 can be inserted into the restricting groove 4, and this makes it possible to greatly improve the mounting workability without requiring a special jig or skill for such work.

Further, the locking projections 2 formed on the storage member 1 are two, three, or four as desired in the entire circumferential direction. When a pair of the pieces 3 are formed on the outer periphery of the storage member 1 so as to face each other, an aluminum die-cast alloy or a synthetic resin material is used as a material for the storage member 1 including the restriction piece 3, and a casting is performed. Can be formed as a single piece.
That is, referring again to FIG. 3, if the left and right mold dividing surfaces for casting are formed on the line L-L, the right and left molds are moved to the side, thereby restricting pieces including the restricting grooves. The portion 3 can be formed by casting in the storage member 1, and thus the storage member 1 including the restriction groove 4 can be manufactured at low cost. In addition, if the restriction piece portions 3 are formed at least as a pair, the expansion of the insertion piece portion 6 of the closing member 5 can be sufficiently prevented.

Such a closing structure of the storage member can be used for the fuel pump unit device.
That is, the fuel pump unit device S is composed of a pump housing cylinder M in which the fuel pump P is housed and a synthetic resin material that faces the lower end of the fuel pump P and closes the opening at the lower end of the pump housing cylinder M. The fuel pump unit device S is configured to enter the fuel tank T through the opening 7a of the fuel tank T.
Thus, when the fuel pump P is driven, the gasoline fuel stored in the fuel tank T is boosted by the fuel pump P and supplied to the engine (not shown) via the fuel discharge path R, and the engine is operated. It is.
Here, at the lower end of the pump housing M, a restricting piece 3 including a locking protrusion 2 and a restricting groove 4 of the housing member 1 of the present invention shown in FIG. 2 is formed. The pump holder N is formed with a locking hole 8, a locking portion 7, and an insertion piece 6 of the closing member 5 shown in FIG.
That is, the pump housing cylinder M uses the housing member 1 of the present invention, and the pump holder N uses the closing member 5 of the present invention.
The fuel pump unit device S having such a configuration is used by being mounted on automobiles and motorcycles. According to this, a large vibration is applied to the pump housing cylinder M and the pump holder N during operation of the engine. However, as described above, the insertion piece 6 is inserted into the restriction groove 4 so that the pump holder N does not fall off the pump housing cylinder M.
The pump holder N formed of a synthetic resin material is always immersed in gasoline fuel in the fuel tank T. When the locking portion 7 of the pump holder N expands outward due to swelling. Even if it exists, since the insertion piece part 6 always enters the restriction groove 4 and is disposed, the pump holder N does not fall off from the pump housing cylinder M.
As described above, by using the storage member 1 and the closing member 5 of the present invention for the pump storage body M and the pump holder N of the fuel pump unit device, the fuel pump has particularly high vibration resistance and high resistance to swelling by fuel. A unit device can be provided.

  In addition, although the storage member 1 of a present Example is shown with a metal material, a synthetic resin material can be used.

The side view of the cylindrical storage member used for the closure structure of the cylindrical storage member of this invention. The longitudinal cross-sectional view in the BB line of FIG. The lower side top view seen from the downward direction of FIG. The side view of the cylindrical closure member used for the closure structure of the cylindrical storage member of this invention. The longitudinal cross-sectional view in the GG line of FIG. The side view which shows the initial stage insertion state of the cylindrical closure member in the closure structure of the cylindrical storage member of this invention. The longitudinal cross-sectional view in the YY line | wire of FIG. The side view which shows the medium-term insertion state of the cylindrical closure member in the closure structure of the cylindrical storage member of this invention. The longitudinal cross-sectional view in the JJ line of FIG. The side view which shows the terminal state insertion state of the cylindrical closure member in the closure structure of the cylindrical storage member of this invention. FIG. 11 is a longitudinal sectional view taken along line KK in FIG. 10. The principal part longitudinal cross-sectional view which used the obstruction | occlusion structure of the cylindrical storage member of this invention for the fuel pump unit apparatus. The side view which shows the obstruction | occlusion structure of the conventional cylindrical storage member. FIG. 14 is a longitudinal sectional view taken along line AA in FIG. 13.

DESCRIPTION OF SYMBOLS 1 Cylindrical storage member 1a Opening part 1b Lower end 2 Locking protrusion 2b Locking step part 3 Restriction piece part 4 Restriction groove 5 Cylindrical closure member 5a Bottom part 6 Insertion piece part 6a Upper end 7 Locking part 8 Locking hole 8a Engagement Stop part 9 Insertion hole

Claims (4)

A cylindrical storage member that closes the opening (1a) by engaging a cylindrical closing member (5) having a bottomed cup shape with a cylindrical storage member (1) having an opening (1a) at the lower end. In the closing structure of the member,
The cylindrical storage member (1) has a locking projection (2) projecting from the outer peripheral surface of the lower end thereof and having an upward locking step (2b), and above the locking step (2b). The engagement member is formed so as to protrude from the outer peripheral surface of the cylindrical storage member (1) and to form a restriction groove (4) that opens downward between the outer peripheral surface of the cylindrical storage member (1). A regulation piece (3) bent toward the stop portion (2b) side,
On the other hand, the cylindrical closure member (5) formed of a synthetic resin material and having a bottomed cup shape has a pair of elastically deformable insertion pieces extending from the outer periphery of the bottom (5a) toward the upper side (U). (6), a locking portion (7) formed so as to connect the intermediate portions of the both insertion piece portions (6) to each other, and the locking portion (7) and the both insertion pieces below the locking portion (7) A locking hole (8) surrounded by the portion (6) and having the upper end as a downward locking step portion (8a), and the locking portion (7) and the insertion piece portions (6) above the locking portion (7) And an insertion hole (9) surrounded by
The locking projection (2) and the locking portion (7) close the cylindrical closing member (5) and the opening (1a) of the cylindrical storage member (1) at its bottom (5a). When the tubular housing member (1) is fitted to the outer periphery (1c), the engagement portion (7) is deformed to expand, and the engagement protrusion (2) gets over the engagement protrusion (2). The locking projection (2) is introduced into the locking hole (8), and the upward locking step (2b) of the locking projection (2) is engaged with the downward locking of the locking hole (8). It is formed so as to abut and lock the stop portion (8a),
The both insertion pieces (6) are formed in a cylindrical storage member (1) of the cylindrical closure member (5) before the diameter-enlarging deformation of the locking portion (7) by the locking protrusion (2) starts. ) At the initial stage of fitting to the restriction groove (4), and the insertion proceeds until the engagement protrusion (2) is introduced into the engagement hole (8). A closed structure for a cylindrical storage member, wherein   The outer peripheral shape of the locking projection (2) is an upward inclined wall surface (2a) having an upward angle (X) in which the outer diameter gradually increases from the lower (D) to the upper (U), The inner peripheral shape of the stopper (7) is an upward inclined wall surface (7a) having an upward angle (X) in which the inner diameter (H) gradually increases from the lower (D) to the upper (U), and the cylindrical blockage In the initial stage of fitting the member (5) to the outer periphery (1c) of the cylindrical housing member (1), the upward inclined wall surface (7a) of the locking portion (7) is not expanded and deformed. Abutting on the upward inclined wall surface (2a) of the locking projection (2), and when the fitting of the tubular closing member (5) to the tubular storage member (1) is advanced beyond the initial stage of fitting, When the upward inclined wall surface (7a) of the locking portion (7) is deformed to expand, the upward inclined wall surface (2) of the locking projection (2) ( By sliding a) and getting over it, the locking projection (2) is introduced into the locking hole (8), and the upward locking step (2b) of the locking projection (2) The cylindrical storage member closing structure according to claim 1, wherein said locking hole (8) is brought into contact with and locked to a downward locking step portion (8a). The closed structure of the cylindrical storage member according to claim 1 , wherein a pair of the regulating piece portions (3) facing each other are provided on the outer peripheral surface of the cylindrical storage member (1).   The cylindrical housing member (1) is for an internal combustion engine in which a fuel pump (P) is housed and disposed and enters the fuel tank (T) through an opening (Ta) of the fuel tank (T). The pump housing cylinder (M) constituting the fuel pump unit device is used, and the cylindrical closing member (5) is disposed in the fuel tank (T), and the fuel pump (P) disposed in the pump housing cylinder. The cylindrical storage member according to claim 1, wherein the pump holder (N) is disposed so as to face the lower end of the pump housing and closes the opening (1a) at the lower end of the pump storage cylinder (1). Occlusion structure.

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