JP2001200976A - Connecting structure of assembly pipes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve sealing performance, and improve connecting workability with a simple structure while securing connecting reliability by preventing slipping-out of the connector connection in a connecting structure of assembly pipes. SOLUTION: End parts of pipes 2A, 2B, 2C are temporarily held in an opening 10a of a floor wall 10 by a grommet 4, and a clamp 5 is installed on the other side of the floor wall 10. Arranging connectors 1A, 1B, 1C parallelly held by a holder 6 are connected to these pipe end parts. Thus, the pipe end parts are inserted into the respective connectors 1A, 1B, 1C, the connection of the plural pipe end parts and the respective connectors can be colectively simultaneously completed only by pushing the holder 6 on the pipe side, and slipping-out of the connector connection can be prevented by installing and joining the clamp 5 and the holder 6. An opening such as an installing hole is not formed on the floor wall 10 except for the opening 10a for inserting the pipe end parts, and since the opening 10a for inserting the pipe end parts is also airtightly sealed by the grommet 4, sufficient sealing performance can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of mounting a connector on each of a plurality of hose ends on one side of a boundary wall, and attaching a pipe on the other side of the boundary wall to each of the connectors. The present invention relates to a connection structure of a collective pipe connected through an opening formed in a wall.

[0002]

2. Description of the Related Art In a fuel piping system of an automobile, a plurality of fuel hoses (a fuel supply hose, a fuel return hose, an evaporation hose, etc.) connected to a fuel tank are piped on one side with a floor wall as a boundary, and the other side. A plurality of pipes connected to the engine or canister side are connected to form a collective pipe, and the plurality of fuel hoses and the plurality of pipes are connected through openings formed in the floor wall. It has a connection form. For connection between each fuel hose and a pipe, a standardized piping connector is used in order to facilitate connection work in a production line and improve productivity. Regardless of the fuel piping system of the automobile, the connection configuration of the piping system connected through the opening formed in such a boundary wall and the connection of the piping using the standardized piping connector described above are various piping systems. Are generally used at the connection points.

[0003] Conventionally, as a connection structure of the above-mentioned collective piping, a structure as shown in FIG. 5 has been proposed for connecting a plurality of hoses or pipes in a bundle (for example, Japanese Utility Model Application Laid-Open No. H06-158). -36931). To explain this conventional example, three hoses 3A, 3B, 3C attached to the respective ends of the pipe connectors 1A, 1B, 1C are provided on one side of the boundary wall 10 and three pipes 2A connected thereto. , 2B, 2C are disposed on the other side of the boundary wall 10 and are connected through an opening 10a formed in the boundary wall 10, and one side of the boundary wall 10 has piping connectors 1A, 1B, 1C. A grommet 20 is attached to collect and hold the pipes 2A and 2B on the other side of the boundary wall 10.
A clamp 30 for collecting and holding the 2B and 2C is mounted.

The grommet 20 includes a sleeve portion 20a for covering each piping connector, and a flange portion 20 formed below the sleeve portion and abutting on the boundary wall 10.
b and the engaging portion 2 that engages with the opening 10a of the boundary wall 10
0c. The sleeve portion 20a forms a housing cylinder portion that houses the piping connectors in parallel, and serves to collectively hold the piping connectors and protect the piping connectors. Flange part 20b
Is for attaching the grommet 20 to the boundary wall 10, and has a screw hole corresponding to the mounting hole 10b formed in the boundary wall 10. Also, the clamp 30
Holding section 3 for holding pipes 2A, 2B, 2C in parallel
0a and a mounting portion 30b having a mounting hole for mounting to the boundary wall 10.

[0005] As a connection procedure of this connection structure, first,
The grommet 20 holding the piping connectors 1A, 1B, 1C is engaged with the opening 10a from one side of the boundary wall 10 by the engaging portion 20c, and the pipes 2A, 2B are passed through the opening 10a from the other side of the boundary wall 10. , 2C are connected to piping connectors 1A, 1B, 1C, respectively. Then, in order to attach the clamp 30 to the grommet 20 through the boundary wall 10, the screw hole in the flange portion 20 b of the grommet 20, the mounting hole 10 in the boundary wall 10
b. The mounting holes in the mounting portion 30b of the clamp 30 are aligned, and the clamp 30 is mounted and coupled with the bolts 40 from the clamp 30 side.

In such a conventional connection structure of a collective pipe, a plurality of pipes are held by using the grommet 20 and the clamp 30 to converge the pipes, and the grommet 20 and the clamp 30 are interposed via the boundary wall 10. The screw connection prevents the connector connection from coming off.

[0007]

However, according to the above-mentioned conventional connection structure for collecting pipes, the opening 1 is formed in the boundary wall 10.
Since it is necessary to form the mounting hole 10b in addition to the hole 0a, there is a problem that water leaks from the mounting hole 10b into the room and noise enters. In order to avoid this, if the sealing structure in the mounting hole 10b is made strict, the cost will increase accordingly, and the work at the time of assembly will be complicated,
It will worsen productivity.

In the conventional connection structure described above, if the clamp 30 is to be assembled with the clamps 30 held on the pipes 2A, 2B, 2C during connection, three pipes 2A, 2C are required.
3 for aligning the ends of B and 2C with the piping connectors 1A, 1B and 1C, and 2 for aligning the mounting hole of the clamp 30 with the screw hole of the grommet 20.
Although it is necessary to simultaneously perform a total of five axial alignments with the axial alignment of the places, the clamp 30 is connected to the pipes 2A, 2B, and 2C.
, The parallel operation of the pipes 2A, 2B, 2C cannot be accurately positioned, and the connection work is rather complicated. Therefore, in the above conventional one,
Pipe 2 for each piping connector 1A, 1B, 1C
A, 2B, and 2C had to be individually connected, and there was a problem in workability.

The present invention has been proposed in order to cope with the above-described situation, and a connector is attached to each of a plurality of hose ends on one side of a boundary wall, and each of the connectors is provided with: In the connection structure of the collective piping that connects the pipe on the other side of the boundary wall through the opening formed in the boundary wall, while securing the connection reliability by preventing the connector connection from falling off as in the conventional case, An object of the present invention is to realize an improvement in sealability and an improvement in connection workability with a simple structure.

[0010]

According to the present invention, a connector is mounted on each of a plurality of hose ends on one side of a boundary wall.
In a connection structure of a collective pipe for connecting a pipe on the other side of the boundary wall through an opening formed in the boundary wall,
A holder for holding the connector in parallel, a grommet for sealing the opening and holding in parallel the ends of the pipe inserted from the other side of the boundary wall in the opening, and a grommet for holding the end of the pipe in the boundary wall And a clamp that restricts axial movement while being positioned on one side of the pipe, and connects the end of the pipe positioned on the clamp to the connector held by the holder on one side of the boundary wall. The clamp and the holder are attached and connected.

Further, in addition to the above features, the clamp comprises a holding portion for holding a base end side of a projection formed on an outer periphery of an end of the pipe and a support for abutting and supporting the other surface of the boundary wall. And a part.

Further, in addition to the above features, the clamp and the holder are attached and connected by engagement of bolts or claws.

According to the above construction, the ends of the plurality of pipes are temporarily held by the grommets in the opening of the boundary wall, and the clamp is mounted on the other side of the boundary wall, thereby ensuring reliable parallel holding. And the movement in the axial direction is restricted. On the other hand, the connectors attached to each of the plurality of hose ends are held in parallel by the holder in a state corresponding to the parallel holding of the pipe ends. According to this, each of the plurality of pipe ends inserted through the opening from the other side of the boundary wall, positioned by the grommet and the clamp on one side of the boundary wall, and restrained from moving in the axial direction is held by the holder. By inserting the holder into the pipe and pushing the holder into the pipe, the connection between the ends of the plurality of pipes and each connector can be completed at once. Then, on one side of the boundary wall, the clamp and the holder are attached and connected by the engagement of bolts or claws, so that the connector connection can be reliably prevented from coming off, and sufficient connection reliability can be secured.

Further, in the above construction, an opening such as a mounting hole is not formed in the boundary wall other than the opening through which the pipe end passes, and the opening through which the pipe end passes is hermetically sealed by a grommet. You. Therefore, in this connection structure, it is possible to secure sufficient sealing performance without forming a special sealing structure.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings (the same parts as in the conventional example will be denoted by the same reference numerals, and some description thereof will be omitted). In this embodiment, the fuel pipe system of an automobile will be described as an example. However, as described above, the present invention is not limited to this, and can be employed in a connection structure of a collective pipe for other uses.

FIG. 1 is an explanatory view showing a connection structure of a collecting pipe according to an embodiment of the present invention. In the figure, 1A, 1
B and 1C are pipe connectors, 2A, 2B and 2C are pipes extending to the engine or canister side, 3A, 3B and 3
C is three fuel hoses (fuel supply hose, fuel return hose, and evaporative hose) to which the above-mentioned piping connectors 1A, 1B, 1C are attached at the ends. Here, three fuel hoses 3 </ b> A, 3 </ b> A are provided outside the floor wall 10 serving as a boundary wall.
B and 3C, and the pipe 2
A, 2B, and 2C are piped, and both of them are connected to the floor wall 10.
Piping connectors 1A, 1A through openings 10a formed in
B and 1C are trying to connect.

Each of the pipes 2A, 2B, 2C is formed with a ring-shaped convex portion 2a which engages with the pipe connector 1A, 1B, 1C at the outer periphery of the tip portion.
A projection 2b for restraining each pipe from moving in the axial direction is formed by a clamp 5 described below on the outer periphery on the base end side. In addition, pipes 2A, 2B, 2
Further on the base end side of the protrusion 2b of C, the pipes 2A, 2
A grommet 4 for holding B and 2C side by side is attached. The grommet 4 is a rubber member having a concave portion 4a around which the edge of the opening 10a fits. The grommet 4 holds the pipes 2A, 2B, and 2C in parallel and closes the opening 10a to hermetically seal the opening. is there. on the other hand,
A holder 6 is mounted on the piping connectors 1A, 1B, 1C. The holder 6 includes a sleeve portion 6a for covering and holding each piping connector, and a mounting portion 6b extending from the upper surface of the sleeve portion 6a. Reference numeral 5 denotes a clamp, which comprises a holding portion 5a having a holding groove for holding the three pipes 2A, 2B, 2C, a supporting portion 5b, and a mounting portion 5c. 7 is a connection bolt.

FIGS. 2A and 2B are explanatory views showing a connection state of the connection structure. FIG. 2A is a front view, and FIG.
It is sectional drawing. The grommet 4 is fitted to the edge of the opening 10a while holding the pipes 2A, 2B, and 2C passed through the opening 10a from the indoor side of the floor wall 10 in parallel. The holding portion 5a is attached to the clamp 5 at the base end side of the projection 2b of the pipes 2A, 2B, 2C on the outdoor side of the floor wall 10, and the support portion 5b is held in contact with the indoor surface of the floor wall 10. The portion 5a is supported. Then, on the indoor side of the floor wall 10, the ends of the pipes 2A, 2B, 2C are connected to the piping connectors 1A, 1B, 1C, and further, the mounting portion 5c of the clamp 5 and the mounting portion 6b of the holder 6 are connected. Are connected by connecting bolts 7.

Hereinafter, the connection procedure of the connection structure will be described with reference to FIGS. In FIG.
The grommet 4 made of rubber is attached to the pipes 2A, 2B, and 2C in advance, and the grommet 4 is opened from the indoor side of the floor wall 10 to the opening 1.
0a, and the grommet 4 is fitted into the edge of the opening 10a. The grommet 4 may be mounted on a pipe by forming a mounting hole having a diameter smaller than the pipe diameter and inserting the pipe end.
It may be mounted integrally with the pipe. In the assembled state of FIG. 2A, the pipes 2A, 2B, and 2C are temporarily held on the floor wall 10, and the ends of the pipes can move up and down or left and right, and the parallel state of the pipes cannot be positioned. . However, the opening 10a is closed by the grommet 4 to ensure the sealing performance.

Next, as shown in FIG. 1B, clamps 5 are attached to the pipes 2A, 2B and 2C on the outside of the floor wall 10.
Attach. The clamp 5 is mounted on the pipes 2A, 2B,
This is performed by fitting the mounting groove of the holding portion 5a from the side from the base end side of the protrusion 2b of 2C. In addition, this clamp 5
Is formed such that the upper end of the support portion 5b is in contact with the other surface of the floor wall 10 while the lower end of the holding portion 5a is in contact with the protrusion 2b. In the assembled state shown in FIG. 2B, even if the clamp 5 and the projection 2b come into contact with each other and an external force is applied to the pipe, the pipe does not rise upward, and the pipes 2A, 2A
The movement of B, 2C in the axial direction is restricted, and the holding of the grommet 4 and the holding of the clamp 5 by the holding portion 5a are combined, so that the parallel arrangement of the pipes 2A, 2B, 2C is positioned. .

Next, as shown in FIG. 1C, the pipe 2 is positioned outside the floor wall and restrained from moving in the axial direction by mounting the grommet 4 and the clamp 5.
The piping connectors 1A, 1B, 1C held by the holder 6 are connected to the ends of A, 2B, 2C. At this time, since the pipes 2A, 2B, and 2C are restrained from moving in the axial direction, the piping connector 1 held by the holder 6 is prevented.
The connection can be completed simply by inserting the pipe ends into A, 1B and 1C and pushing up the holder 6 in the direction of the arrow. In addition, since the ends of the pipes 2A, 2B, and 2C are firmly positioned in a parallel state, three connections can be made simultaneously and collectively.

Then, as shown in FIG. 2D, the clamp 5 and the holder 6 are connected and fixed by the connecting bolts 7 at the respective mounting portions 5c and 6b. With this combination,
The connection between the connector and the pipe is almost completely prevented from coming off, but even if the engagement between the connector and the pipe is released, the connection between the connector and the pipe can be maintained and sufficient connection reliability can be maintained. Can be secured.

Next, another embodiment of the present invention will be described with reference to FIG. In this embodiment, portions denoted by the same reference numerals as those in the above-described embodiment have the same configurations as those in the above-described embodiment, and description thereof will be omitted. This embodiment has a feature in the attachment connection between the clamp 5 and the holder 6, and the two are easily connected by engagement of the claws. That is, the clamp 5 is formed with an engagement claw portion 5c ′ serving as an attachment portion, and the holder 6 is provided with an engagement receiving portion 6 that is coupled thereto.
c ′ is formed. According to this, only by pushing the holder 6 into the clamp 5 side, the connection between the pipe and the connector and the connection for preventing the detachment can be performed in one step, and the workability of the connection can be further improved.

In each of the embodiments of the present invention described above, the ends of the pipes 2A, 2B, 2C are temporarily held by the grommets 4 in the openings 10a of the floor wall 10, and the floor walls 1
By mounting the clamp 5 on the other side of the pipe 0, reliable positioning for parallel holding is performed and axial movement is restrained. At this pipe end, the arraying connectors 1A, 1B and 1C are connected. Therefore, the end of the pipe is
By simply inserting the holders 6 into the connectors 1A, 1B, and 1C held in step 1 and pushing the holder 6 into the pipes, the connection between the ends of the plurality of pipes and the connectors can be completed simultaneously. Since the clamp 5 and the holder 6 are attached and connected by the engagement of bolts or claws, the connector connection can be reliably prevented from coming off, and sufficient connection reliability can be ensured.

Further, in the above embodiment, no openings such as mounting holes are formed in the floor wall 10 other than the openings 10a through which the pipe ends pass, and the openings 10a through which the pipe ends pass are also hermetically sealed by the grommet 4. Since it is stopped, it is possible to secure sufficient sealing performance in the connection structure without forming a special seal structure.

[0026]

Since the present invention is configured as described above,
A connector is attached to each of a plurality of hose ends on one side of the boundary wall, and a pipe for connecting a pipe on the other side of the boundary wall to each of the connectors through an opening formed in the boundary wall. In the connection structure, it is possible to improve the sealability and the connection workability with a simple structure while securing the connection reliability by preventing the connector connection from coming off.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a connection structure of a collecting pipe according to one embodiment of the present invention.

FIG. 2 is an explanatory view showing a connection state in a connection structure of a collecting pipe according to one embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a connection procedure in a connection structure of a collecting pipe according to one embodiment of the present invention.

FIG. 4 is an explanatory view showing a connection structure of a collecting pipe according to another embodiment of the present invention.

FIG. 5 is an explanatory view showing a conventional connection structure of a collective pipe.

[Explanation of symbols]

 1A, 1B, 1C Piping connector 2A, 2B, 2C Pipe 3A, 3B, 3C Fuel hose 4 Grommet 5 Clamp 6 Holder 7 Coupling bolt 10 Floor wall

Claims (3)

[Claims] 1. A connector is attached to each of a plurality of hose ends on one side of a boundary wall, and a pipe on the other side of the boundary wall is inserted into each of the connectors through an opening formed in the boundary wall. In a connection structure of a collective pipe to be connected, a holder for holding the connector in parallel, a grommet for sealing the opening and holding in parallel the end of the pipe inserted from the other side of the boundary wall in the opening, A clamp for positioning an end of the pipe on one side of the boundary wall and restraining axial movement, and an end of the pipe positioned on the clamp and the holder on one side of the boundary wall. A connection structure for collecting pipes, wherein a connector held by a connector is connected, and the clamp and the holder are attached and connected. 2. The clamp according to claim 1, wherein the clamp comprises a holding portion for holding a base end side of a projection formed on an outer periphery of an end of the pipe, and a supporting portion for contacting and supporting one surface of the boundary wall. The connection structure for a collective pipe according to claim 1, wherein: 3. The clamp according to claim 1, wherein the clamp and the holder are attached and connected by engagement of bolts or claws.
Collective piping connection device as described.