JP4087926B2 - Dust-proof cap for connectors - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a dust cap for a connector (hereinafter simply referred to as a cap), and more particularly, to prevent dust and other dust from entering a tube insertion hole when a connector connecting a tube and a hose is stored or transported. The present invention relates to a cap that is inserted into the body insertion hole .
[0002]
[Prior art]
2. Description of the Related Art Conventionally, for example, when connecting a fuel feeding tube and a fuel feeding hose in an automobile, a connector that connects them both in a continuous manner is used (see connector 111 in FIG. 13). As shown in FIG. 13, the connector 111 connects a hose to the outer periphery of the hose connection portion 114 on one side, and a tube body (not shown) is inserted into the tube body insertion hole 113 of the main body portion 112. . An O-ring 116 is secured in the tube insertion hole 113 of the connector 111 by bushes 117 and 118 so that the tube inserted into the tube insertion hole 113 is held in close contact with the O-ring 116. .
[0003]
On the other hand, the manufacturer of the connector 111 is transported and stored in order to obtain an assembly product in which a hose and a tube are connected to the connector 111, but dust such as dust does not enter the tube insertion hole 113 during this time. Further, the cap 101 shown in FIG. 12 is attached to the tube insertion hole 113 of the connector 111. An appropriate means (not shown) for closing the tube hole 115 is provided on the hose connection portion 114 side.
[0004]
As shown in FIG. 12, a conventional cap 101 and the lid 102 serving as a knob portion covers the tubular body insertion hole 113, the insertion portion of the small-diameter rod shape to be fitted to the O-ring 116 is inserted into the tube insertion holes 113 103 and a synthetic resin.
As shown in FIG. 13, when the cap 101 is attached to the tube insertion hole 113 of the connector 111, the cap 101 is attached to the connector 111 in a state where the insertion portion 103 is crimped to the O-ring 116 of the tube insertion hole 113. Fixed.
[0005]
[Problems to be solved by the invention]
However, as shown in FIG. 13, the conventional cap 101 has the insertion portion 103 fixed to the O-ring 116 in a crimped state as shown in FIG. When attached, there is a concern that the O-ring 116 may sag or deform. If a problem such as sag occurs in the O-ring 116, fluid may leak from the pipe inserted into the tube insertion hole 113.
[0006]
An object of the present invention has solved cents the disadvantages of conventional caps discussed above, without the sag or deformation of the contact means of the tubular body, such as O-ring causing leak of the tube body fluids Another object of the present invention is to provide a connector cap that can sufficiently protect the tube insertion hole from dust.
[0007]
[Means for Solving the Problems]
The invention of claim 1
A body having a contact means furnished tube insertion holes of the tube, has a hose connection portion for connecting the hose, the tube and hose tube insertion holes of the connector to be connected to the communication form for dustproof A covering cap,
A lid that covers the open end face of the tube insertion hole;
An annular side portion provided on the outer peripheral portion of the lid portion and extrapolated to the main body so as to cover the outer periphery of the main body;
Removably be inserted into the pipe body inserted provided inside the hole and the tube body insertion hole of the opening end face side retaining said contact means within the bushing, the insertion convex its tip outer peripheral portion is notched in slant And
It is characterized in that it is formed by a protrusion provided on the outer peripheral surface of the insertion convex portion and crimped to the inner peripheral surface of the bush.
[0008]
According to invention of Claim 1, a cap consists of a cover part, a side part, an insertion convex part, and a protrusion. Insertion convex portion is removably inserted into the bush and retained the contact means in the open end face side of the provided and the tube body insertion hole into the tube insertion hole of the body. The insertion convex portion does not contact the contact means by being inserted into the bush. Further, the protrusion is pressure-bonded to the inner peripheral surface of the bush. Moreover, a side part is extrapolated so that the outer periphery of the main body may be covered. Moreover, a cover part covers the tube insertion hole of a main body. Therefore, the tube insertion hole of the connector is closed by the cap to be dust-proof.
[0009]
The invention of claim 2 is the invention of claim 1, wherein said contact means is Ru O-ring der.
[0010]
In the invention of claim 2, the insertion convex portion inserted into the bush does not contact the O-ring.
[0013]
The invention of claim 3 is the invention of claim 1 or 2, the inside of the side is characterized by consisting of projections are formed structure to be crimped to the body outer periphery.
[0014]
According to a third aspect of the present invention, the annular side portion has a protrusion that is crimped to the outer peripheral portion of the main body on the inner peripheral surface. The cap inserted into the connector main body is inserted into the outer periphery of the main body in a crimped manner by a protrusion.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, a first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows a connector 1 and a cap 21 according to this embodiment.
[0016]
As shown in FIG. 2, the connector 1 is composed of a vertically oriented main body 4 and a narrow tubular hose connecting portion 7 connected laterally to the lower surface thereof. The main body 4 has a tube insertion hole 6 closed at the lower side where the tube K is inserted, and communicates with a small flow hole (tube hole) 8 of the hose connection portion 7. On the outer periphery of the hose connection portion 7, a stopper 9 for the hose H to be extrapolated is provided.
[0017]
As shown in FIG. 2, the outer diameter of the main body 4 is slightly larger at the upper portion 3 than the lower portion 2, and the inner diameter of the upper portion 3 is inserted into the O-ring 10 and the bushes 11 and 12. The hole L is larger in diameter than the tube insertion hole 6. A connecting portion between the tube insertion hole 6 in the lower portion 2 and the large-diameter hole portion L in the upper portion 3 is a stepped inner peripheral portion 5A, and a flange portion 5B is provided on the outer periphery of the main body 4 corresponding to the stepped inner peripheral portion 5A. Is formed.
[0018]
As shown in FIG. 2, two O-rings 10 are press-fitted into the upper portion of the stepped inner peripheral portion 5A of the large-diameter hole L via annular bushes 11 and 12, and are prevented from coming off. The bushes 11 and 12 have a constant thickness that is thinner than the ring thickness of the O-ring 10 and do not interfere with the tube body K to be inserted. The bush 12 on the opening end face side (upper side in FIG. 2 ) of the tube body insertion hole 6 has a wide vertical width, and a part thereof is pressed into the recess 3A on the peripheral surface of the large-diameter hole L so that it does not come out. Has been. In order to facilitate the insertion of the tube body K, the wide bush 12 has an upper end inner periphery on the opening end face side that is obliquely cut out. The inner diameter of the mounted O-ring 10 is slightly smaller than the hole diameter of the tube body insertion hole 6 and is crimped to the outer peripheral surface of the tube body K inserted into the tube body insertion hole 6. The bush 12 corresponds to the “bush provided in the tube insertion hole and the contact means is prevented from coming off on the opening end face side of the tube insertion hole” in the present specification.
[0019]
As shown in FIG. 1, the cap 21 described above includes a lid portion 22 having an insertion convex portion 23 to be inserted into the tube insertion hole 6, and an upper portion 3 of the main body 4 provided on the insertion convex portion 23 side of the lid portion 22. And an annular side portion 25 that covers the outer peripheral surface of the outer peripheral surface. As shown in FIGS. 3 and 4, the lid portion 22 is formed of a circular plate having a size that covers the upper end surface of the main body 4 (upper portion 3) and has a protruding portion having a predetermined width that becomes the knob portion 22 </ b> A on the outer periphery. An insertion convex portion 23 that protrudes inward is formed. A side portion 25 surrounding the insertion convex portion 23 is formed in an annular shape at a portion having a predetermined width from the center portion while leaving a predetermined width to be the knob portion 22A on the outer periphery of the lid portion 22.
[0020]
The inner diameter of the side portion 25 is substantially the same as the outer diameter of the upper portion 3 of the connector 1 and is set to a diameter that can be extrapolated to the upper portion 3. As shown in FIG. 5, the vertical width (width in the direction of the axis g) of the side portion 25 is such that the lid portion 22 covers the upper end surface of the main body 4 and the lower end surface of the side portion 25 can contact the flange portion 5B of the main body 4. It is said that.
[0021]
The length of the convex portion of the insertion convex portion 23 is set so as to be in contact with the wide bush 12 portion of the tube insertion hole 6 in the upper portion 3 and is not in contact with the O-ring 10. As shown in FIG. 5, the convex length of the insertion convex portion 23 of the present embodiment is substantially the same as that of the wide bush 12, and the lower end outer peripheral portion is inserted so that it does not contact the O-ring 10. In order to make it easy, it is cut out in an oblique shape, and the central part of the lower end is formed in a shape protruding slightly inward.
[0022]
As shown in FIGS. 3 and 4, when the insertion convex portion 23 is inserted into the tubular body insertion hole 6 on the outer peripheral surface of the insertion convex portion 23, a line that comes into contact with the inner peripheral surface of the bush 12 in a crimped manner. A plurality of strip protrusions 24 are formed at substantially equal intervals in the direction of the axis g of the insertion protrusion 23. That is, when the insertion convex portion 23 is inserted into the tube body insertion hole 6, each projection 24 comes into contact with the inner peripheral surface of the tube body insertion hole 6 in a crimping manner, so that the insertion convex portion 23 is brought into contact with the tube body insertion hole 6. It can be removably inserted and held.
[0023]
The connector 1 is integrally molded with a strong synthetic resin, for example, 12 nylon blended with glass fiber, and the cap 21 is integrally molded with a synthetic resin such as polypropylene.
[0024]
The manufactured connector is transported to another line to be an assembly product to which the tubular body K and the hose H are connected, but may be stored for a while for the convenience of the separate line. Therefore, each connector 1 is covered with a cap 21 for dust prevention.
[0025]
That is, as shown in FIG. 1, the cap 21 is disposed above the tube insertion hole 6 of the connector 1 so that the opening of the side portion 25 is opposed, and the tube 21 is inserted into the upper three end surfaces of the connector 1. The hole 6 can be covered with a cap 21. As shown in FIG. 5, the cap 21 covering the tube insertion hole 6 is inserted into the hole of the wide bush 12 with the insertion projection 23 and each protrusion 24 is brought into a pressure-bonded state on the inner peripheral surface of the bush 12. It fits in the bush 12 part of the body insertion hole 6. Further, the side portion 25 surrounding the outer peripheral surface of the upper portion 3 is in a contact state with the upper surface of the flange portion 5 </ b> B of the main body 4, so that the cap 21 is fixedly held on the upper portion 3.
[0026]
The tube insertion hole 6 of the main body 4 covered with the cap 21 is inserted with the insertion convex portion 23 of the lid portion 22, and the lid portion 22 covers the upper three end surfaces of the main body 4 and the side portion 25 is in contact with the flange portion 5B. Therefore, intrusion of dust such as dust from the tube insertion hole 6 of the main body 4 is reliably prevented.
As shown in FIG. 5, the insertion projection 23 does not contact the O-ring 10 when the connector 1 covers the cap 21, so that even if the cap 21 is kept covered for a long time, And no deformation.
[0027]
When removing the cap 21 covered with the connector 1, the cap 21 can be easily pulled upward by pinching the knob portion 22A on the outer periphery of the lid portion 22 with a finger.
[0028]
The above-described cap 21 has a structure including the side portion 25. However, as a related technique, as shown in FIG. 6, a cap 31 in which the side portion 25 is omitted can be used. Also in the cap 31 of this structure, the effect of preventing dust from the tube body insertion hole 6 and preventing the O-ring 10 from sagging and deforming can be obtained in the same manner as the cap 21 described above.
In FIG. 6, the same members as those of the cap 21 are denoted by the same reference numerals, and description thereof is omitted.
[0029]
The cap 21 may be a cap 41 having a structure shown in FIG. That is, the cap 41 in FIG. 7 (a) is provided with an annular protrusion 44 (or a recess) along the outer periphery at a predetermined position on the outer periphery of the insertion convex portion 23. As shown in FIG. An annular concave portion 44A (or a convex portion) that engages with the projection 44 is provided on the inner peripheral surface, and the insertion convex portion 23 is detachably fitted into the tube insertion hole 6. The lid portion 22 has the same diameter as the outer diameter of the upper portion 3, and a protruding portion protruding upward from the lid portion 22 is a knob portion 45.
The cap 41 of FIG. 7 can also obtain the same operational effects as the cap 21 described above. In FIGS. 7A and 7B, the same members as those of the cap 21 are given the same reference numerals and description thereof is omitted. 7A and 7B, the insertion convex portion 23 is omitted for convenience.
[0030]
Next, a second embodiment of the present invention will be described with reference to FIGS.
Since the connector 1 has the same structure as that of the above-described embodiment, the related parts are denoted by the same reference numerals and the description thereof is omitted. 8 to 11, the insertion convex portion 23 is omitted for convenience.
[0031]
As shown in FIG. 8, the cap 51 covers the upper end surface of the main body 4 of the connector 1 and has a circular lid portion 52 having a predetermined width portion serving as a knob portion 52 </ b> A on the outer periphery, and an upper portion 3 of the connector 1. It consists of an annular side portion 53 having a diameter that is substantially the same as the outer diameter and that can be extrapolated to the upper portion 3. The vertical width of the side portion 53 is set such that the lower end of the side portion 53 abuts against the flange portion 5B of the connector 1 when the lid portion 52 covers the upper portion 3 of the connector 1.
[0032]
As shown in FIGS. 9 and 10, when the side portion 53 is inserted into the upper portion 3 of the connector 1 on the inner peripheral surface of the annular side portion 53, the filaments that come into contact with the outer peripheral surface of the upper portion 3 in a crimped manner. A plurality of protrusions 54 are formed at substantially equal intervals in the direction of the axis g of the side portion 53, and four in this embodiment. That is, when the cap 51 is inserted into the upper part 3 of the connector 1, each protrusion 54 comes into contact with the outer peripheral surface of the upper part 3 in a crimping manner, so that the cap 51 is removably fitted to the upper part 3 of the connector 1. be able to.
[0033]
When the connector 51 is covered with the cap 51, as shown in FIG. 8, the cap 51 is disposed above the tube insertion hole 6 of the connector 1 with the opening of the side portion 53 of the cap 51 facing each other. As shown, the tube insertion hole 6 can be covered with a cap 51 by covering the top 3 end face of the connector 1.
[0034]
As shown in FIG. 11, the cap 51 covering the tube insertion hole 6 is configured such that the protrusions 54 on the inner peripheral surface of the side portion 53 are press-fitted into the outer peripheral surface of the upper portion 3 of the main body 4. The cap 51 is fixedly held on the upper portion 3 by being extrapolated to the surface and having the lower end surface in contact with the upper surface of the flange portion 5B of the main body 4.
[0035]
Since the tube insertion hole 6 of the main body 4 is covered with the lid portion 52 and the side portion 53 is fitted to the outer periphery of the upper portion 3 in contact with the flange portion 5B, the tube insertion hole 6 of the main body 4 is Intrusion of dust such as trash is surely prevented. As shown in FIG. 11, since the cap 51 has no member that contacts the O-ring 10 in a state where the connector 1 is covered, even if the cap 51 is covered for a long time, Not involved in deformation.
[0036]
When the cap 51 covered with the connector 1 is removed, the cap 51 can be easily removed upward by pinching the knob 52A on the outer periphery of the lid 52 with a finger.
[0037]
The cap 51 is provided with a knob portion 52A by projecting the outer periphery of the lid portion 52 outward, but the knob portion 52A is omitted when the side portion 53 is pinched to be attached to or removed from the main body 4. (Not shown).
[0038]
【The invention's effect】
According to the dust cap of the present invention, together with obtaining no dust of the tube insertion hole, there is no inconvenience to the stem rear deformation of contact means.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a first embodiment of the present invention.
FIG. 2 is a cross-sectional view showing the structure of a connector.
FIG. 3 is an enlarged front view of a cap according to the first embodiment.
4 is a cross-sectional view taken along line IV-IV in FIG.
FIG. 5 is an enlarged cross-sectional view of a state where a cap is inserted into a tube insertion hole of a connector.
FIG. 6 is a cross-sectional view showing a related technology of the cap according to the first embodiment.
7A is a cross-sectional view showing a modified example of the cap according to the first embodiment, and FIG. 7B is an enlarged view of the protruding portion of FIG.
FIG. 8 is a perspective view showing a main part of a second embodiment of the present invention.
FIG. 9 is an enlarged front view of a cap according to a second embodiment.
10 is a cross-sectional view taken along line XX of FIG.
FIG. 11 is an enlarged cross-sectional view showing a state where a cap is inserted into a tube insertion hole of the connector.
FIG. 12 is a perspective view showing a conventional cap.
FIG. 13 is an enlarged cross-sectional view of a state where a conventional cap is inserted into a tube insertion hole of a connector.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Connector 4 Main body 6 Tube insertion hole 7 Hose connection part 10 O-ring 11,12 Bushing 21,31 ,. 41, 51 Cap 22, 52 Lid 23 Insertion convex 25, 53 Side 24, 44, 54 Protrusion K Tube H Hose

Claims (3)

A body having a contact means furnished tube insertion holes of the tube, has a hose connection portion for connecting the hose, the tube and hose tube insertion holes of the connector to be connected to the communication form for dustproof A covering cap,
A lid that covers the open end face of the tube insertion hole;
An annular side portion provided on the outer peripheral portion of the lid portion and extrapolated to the main body so as to cover the outer periphery of the main body;
Removably be inserted into the pipe body inserted provided inside the hole and the tube body insertion hole of the opening end face side retaining said contact means within the bushing, the insertion convex its tip outer peripheral portion is notched in slant And
A dustproof cap formed by a protrusion provided on an outer peripheral surface of the insertion convex portion and press-bonded to an inner peripheral surface of the bush. Dustproof cap according to claim 1, wherein said contact means is characterized by Ru O-ring der. Dustproof cap according to claim 1 or 2 on the inside was characterized by consisting of projections are formed structure to be crimped to the main body outer peripheral portion of said side.

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