JPH09280434A - Channel connection structure - Google Patents

Abstract

(57) [PROBLEMS] To provide a structure for a flow passage connecting portion, such as a fluid flow passage for an engine fluid fuel, lubricating oil, cooling water and the like, and a fuel flow for a heating device, a refrigerator, a compressor, etc., and a cooling medium. The gasket can be detachably locked to the fluid transport pipe applied to the passage through an eye joint to prevent the gasket from falling off at the time of mounting to improve the work. A gasket (13) used when connecting a fluid transport pipe (4) to a connected member (30) via an eye joint (2), and a seal portion (16) mounted between the eye joint (2) and the connected member (30). , A seal portion 16a mounted between the eye joint 2 and the head of the eye joint mounting bolt 28, and a connecting portion 20 for bridging the gaskets 16 and 16a across the eye joint 2 are provided.
An engaging portion that is locked to the eye joint 2 side is formed on the connecting portion 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to fluid passages for liquid fuel and gas fuel for automobile engines, lubricating oil, cooling water and the like, and the above fuels and cooling media for equipment such as compressors, heaters and refrigerators. The present invention relates to a flow passage connecting portion structure for connecting a transport pipe applied to the fluid flow passage to a connected member via a gasket.

[0002]

2. Description of the Related Art As is well known, fluid passages such as liquid and gaseous fuel for automobile engines, lubricating oil, and cooling water, and the above-mentioned fuel and cooling medium for equipment such as compressors, heaters, and refrigerators. The transportation pipe applied to the fluid flow path is bent in a narrow place when the fluid flow path is attached to the engine crankcase, cylinder head, or the main body of the above equipment due to restrictions such as installation space, piping and other parts. At the very least, for example, about 9
It often happens that it has to be bent by 0 degrees.

Specific examples of these will be described with reference to FIG. 7 showing the side surface of the engine and FIG. 8 showing the arrow Y in FIG. 7 regarding the engine, for example. That is, the cooling water that cools the inside of the engine 01 and is discharged cools the oil that is supplied into the oil cooler 03 and circulates in various parts of the engine 01, and the eye joint 0 is discharged from the outlet 05 of the oil cooler 03.
7 to the transport pipe 09, and then to the turbocharger 011 via the eye joint 07 in the middle to cool the turbocharger 011 and then the eye joint 0 again.
7 to the transport pipe 09, and the eye joint 0
7 to flow into the thermostat chamber 013, and the cooling water controlled by the thermostat 013 returns to the engine 01.
The cooling water circulates inside or to a radiator (not shown).

In the cooling passage shown above, four eye joints 07 are provided, and in addition to this, many eye joints 07 are used in the fuel passages and pipes of the compressor and the like, and moreover, in the engine room. In addition to the generator, the starter, the compressor, the exhaust gas purifying device, etc., they are arranged in a narrow place and in a place that is out of reach of workers.

As is apparent from FIGS. 7 and 8, the fluid flowing through the flow passage is arranged such that the flow changes in a direction of about 90 degrees with respect to the flow direction of the transport pipe 09. In order to adapt to the above, the bent portion of the transport pipe 09 is attached to the transport pipe 0.
9 can be bent by itself, and the above-mentioned mounting can be performed. However, since the bending direction of the transport pipe 09 is difficult to determine, it is difficult to orderly arrange the layout. A concentrated load due to the vibration is likely to be applied to the bent portion of 09, a crack may be generated, or the joint portion may be loosened to leak the fluid in the flow path.

As is well known, in order to solve the above-mentioned problems, the connection of the bent portion of the above-mentioned engine or equipment or their pipes and the transportation pipe 09 is connected via an eye joint 07. Regarding the eye joint connection structure for the flow path, there is, for example, Japanese Utility Model Laid-Open No. 5-78965.

As described in Japanese Utility Model Laid-Open No. 5-78965, as a conventional technique, a connecting structure by an eye joint as shown in FIG. 9 is applied, and this eye joint 07 is a shaft connected to a transport pipe 09. It is formed from a pipe portion 06 and a ring-shaped head portion 012 which extends from the end portion of the shaft pipe portion 06 and has a mounting hole 010 in a direction orthogonal to the axis 08 of the shaft pipe portion 06. ing.

The eye joint 07 is a stud bolt type eye joint mounting bolt portion 0 provided at the end of the transport pipe 014 fitted in the mounting hole 010 of the head portion 012.
It is attached to the member 018 to be connected via a gasket 020 by 16 screw portions 017. Transport tube 09 above
And 014 are connected to each other as shown in FIG. 9 by forming an inner periphery of the head portion 012 of the eye joint 07 and an outer periphery of the bolt portion 016 of the transport pipe 014 and the above bolt portion. The flow hole 024 formed in the direction orthogonal to the axis of 016 and the flow path 026 formed in the axial direction of the bolt portion 016 are formed so as to communicate with each other.

In the flow channel eye joint connecting structure shown in FIG. 9, a gasket 020 is attached to the eye joint 07 connected to the transport pipe 09, and the above bolt portion 016 of the transport pipe 014 is attached to the mounting hole 010 of the eye joint 07. The bolt portion 016 is tried to be screwed to the connected member 018 in a fitted state, but many other parts and pipes are arranged at this mounting portion, which is hard to reach and the space is small. Because the work is done, the above-mentioned transport pipe in the lower assembled state 0
It is necessary to assemble 9,014 downward, or diagonally or sideways, and the attached gasket 020 may fall off during the operation. Especially, when the gasket 020 faces downward. In the case of attaching to the member 018 to be connected in the lateral direction, it is difficult to connect the gasket 020 so as not to fall off, which deteriorates the efficiency of the work.

Therefore, the technique described in Japanese Utility Model Laid-Open No. 5-78965 is proposed in order to solve the problems of the conventional example. The technique described in the publication is not shown, but in a connecting structure of an internal combustion engine in which a transport tube is connected to a connected member through a gasket with an eyebolt, the connecting member has a gasket mounting surface of substantially the same shape as the outer peripheral portion of the gasket. A bent protrusion that is bent toward the connected member is provided, and the gasket is brought into contact with the mounting surface of the connected member, and the bent protrusion is fitted to the outer periphery of the mounting surface of the connected member. By doing so, the gasket can be prevented from falling and the mounting of the gasket can be confirmed.

However, even with the gasket having the above-mentioned bent protrusion, for example, as shown in FIG. 7, a generator, a starter, a compressor, an exhaust gas purifying device, etc. are provided in an engine room in a narrow place and in a narrow space. Since it is placed in a part that is out of reach, when the eye joint is mounted, it will come into contact with various parts in the narrow space and the fitting between the bent protrusion and the outer periphery of the mounting surface of the connected member will loosen and easily come off. If it is installed downward, it may fall off.

Further, in order to solve the above-mentioned problems, FIG.
A gasket having a connecting portion provided so as to bridge between the above-mentioned two gaskets 020 used in the eye joint 07 as shown in Nos. 0 and 11 has been proposed. FIG. 10 is a plan view of the connecting structure using the gasket having the connecting portion, and FIG. 11 is a front view of FIG. 10, but different from the above-described conventional example shown in FIG.
Eye joint mounting bolt part 0 at the end of the transport pipe 014
16, a stud bolt type eye joint mounting bolt 036 is used as shown in FIG. 10, and the fluid flow path in the eye joint mounting bolt 036 is the eye joint mounting bolt shown in FIG. Bolt part 01
The same flow holes 024 and flow channels 026 as those of No. 6 are formed.

Further, in place of the connected member 018 shown in FIG. 9, the connected member 0 having the flow path 028 such as the above engine and the above-mentioned equipment also serving as the transport pipe 014, and their pipes.
30, the gasket 020 with two eye joints 07
Connecting gasket 034 having connecting portion 032 bridging
And an eye joint mounting bolt 036 through the mounting hole 010.

[0014]

However, FIG.
Even with the above-described flow channel connection structure in which the eye joint 07 is connected to the connected member 30 via the 0, 11 connection gasket 034, as described with reference to FIGS. An eye joint 07 is provided, and many other eye joints 07 are also used in the fuel passages and piping of the compressor, etc., and in addition to the generator, starter, compressor, exhaust gas purification device, etc. in the engine room, As shown in Nos. 7 and 8, the two gaskets 020 are provided as described above because they are arranged in a narrow space, hard for the operator to reach, and in a site with poor workability.
Although it is intended to prevent forgetting to attach the two gaskets 020, the connecting gasket 034 may fall off during the above-mentioned assembly in an environment with poor workability. It is necessary to make it easier.

The present invention was devised in view of the above problems, and when the eye joint portion is connected to a member to be connected, the gasket is provided on the gasket which can be easily locked to the eye joint side. Since the above gasket is arranged on the eye joint side by the engaged portion, it is connected to the connected member by the eye joint mounting bolt, so that the mounting space as described above is narrow and the work described above is performed. It is an object of the present invention to provide a flow channel connecting portion structure capable of preventing the gasket from falling off even in an environment with poor performance.

[0016]

Therefore, according to the structure of the flow path connecting portion of the present invention as defined in claim 1, the flow connecting the transport pipe having the eye joint to the member to be connected via the gasket by the eye joint mounting bolt. In the road connection structure,
A gasket provided on a mounting end face of the eye joint with which the head portion of the eye joint mounting bolt abuts, and a gasket provided on a mounting end face of the eye joint with which the connected member abuts. It is characterized in that an engagement portion for engaging and disengaging is provided.

According to a second aspect of the present invention, in the structure of the first aspect of the present invention, the eye joint of the transportation pipe is arranged in a direction intersecting the axial pipe portion and the axial line of the axial pipe portion. An eye joint head having a fitting hole for the eye joint mounting bolt provided, wherein the gaskets are provided on both mounting end surfaces of the eye joint head having a fitting hole for the eye joint head. It has two seal portions arranged and a connecting portion bridging both gaskets across the eye joint, and the engaging portion provided in the connecting portion and engaged with the eye joint side is provided. It is characterized by that.

According to a third aspect of the present invention, in the structure of the second aspect, the engaging portion formed in the connecting portion is at least one of the shaft tube portion and the eye joint head portion. It is characterized in that it is configured to be engaged with one of them. According to a fourth aspect of the present invention, in the structure of the second or third aspect of the present invention, the engaging portion extends from the both sealing portions in the axial pipe portion direction of the eye joint. It is characterized in that it has a concave portion provided in the connecting portion so as to be engaged with the shaft tube portion side.

According to a fifth aspect of the present invention, there is provided the flow path connecting portion structure according to any one of the first to fourth aspects, wherein the engaging portion provided on the gasket elastically moves toward the eye joint side. It is characterized in that it is configured to be locked.

[0020]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view illustrating an eye joint and a connecting gasket according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing an assembling order of an eye joint with which the connecting gasket of FIG. 1 is engaged. ) Is a side view showing a state where the connecting gasket and the eye joint are assembled, FIG. 2B is a side view showing the eye joint mounting bolt of the eye joint of FIG. 2A, and FIG. 2 (a)
2 is an explanatory view showing a connected member to which the eye joint is attached, FIG. 3 is a sectional view taken along line 3A-3A in FIG. 2A, and FIG. 4 shows an application example of the embodiment of the present invention shown in FIG. FIG. 5 is an explanatory diagram showing a modified example of the embodiment of the present invention shown in FIG. 1, and FIG. 6 is an explanatory diagram showing an application example of the embodiment of the present invention shown in FIG.

As shown in FIG. 1, the eye joint 2 is formed integrally with or separately from the transport pipe 4, and has a shaft tube portion 8 having a flow path 6 in the axial direction, and an axial line of the shaft tube portion 8. It is formed from the head portion 12 of the eye joint having the fitting hole 10 of the mounting bolt 28 of the eye joint 2 in the intersecting direction (in the direction substantially orthogonal in the case of the present embodiment). Also, 13
As shown in FIG. 1, is a connecting gasket that is engaged with and mounted on the eye joint 2 described above.
Both end surfaces 14 and 14a of the fitting hole 10 of the head 12 on the opening side
2 ring-shaped sealing parts 16 made of copper,
16a.

Further, mounting holes 15 and 15a corresponding to the fitting holes 10 are formed in the seal portions 16 and 16a, respectively. Further, each of the extending portions 18, 18a has an extending portion 18, 18a extending in the axial direction of the shaft tube portion 8.
A has a connecting portion 20 that straddles the shaft tube portion 8 described above. Here, the connecting portion 20 is provided with an engaging portion 22 that can engage with the shaft tube portion 8 of the eye joint 2.

As shown in FIGS. 1 and 2, the engaging portion 22 is formed in a concave shape having an opening, and the concave shape is formed so that the shape of the concave portion is substantially the same as the shape of the shaft tube portion 8. Has been done. In addition, the protrusions 24, 24a are provided near the opening.
Is provided. Then, as shown in FIG.
The projecting portions 24 and 24a define the inlet dimension A of the opening.

The inlet dimension A is slightly smaller than the diameter B of the shaft tube portion 8 of the eye joint 2 so that it can be easily attached and detached by human force, but normally the connecting gasket 13 will not fall off. The optimum dimensions are set. A connecting gasket 13 shown by a chain double-dashed line in FIG.
The eye joint 2 that has been engaged and attached is shown in FIG.
As shown in (c), the eye joint mounting bolt 28 is inserted into the mounting hole 15 in the direction of the arrow Y1 and screwed into the screw hole 32 of the connected member 30 to be mounted.

As shown in FIG. 3, the flow path 6 of the shaft tube portion 8 of the eye joint 2 is provided in the flow path 7 provided in the inner circumference of the head portion 12 and the eye joint mounting bolt 28. It is connected to the flow path 26 of the connected member 30 through the formed flow hole 9 and flow path 11. Since the present embodiment is configured as described above, the connecting gasket 13 is brought into contact with both ends 14 and 14a of the head 12 of the eye joint 2 as shown in FIG. The shaft tube portion 28 of the eye joint 2 is inserted from the opening of the eyepiece 24a and is retained by being elastically engaged and locked.

The eye joint 2 fitted with the connecting gasket 13 shown in FIG.
As shown in (b) and (c), the eye joint mounting bolt 28 is inserted into the mounting hole 15 in the direction of the arrow Y1 and screwed into the screw hole 32 of the connected member 30 to be mounted. As shown in FIG. 3, the flow path 6 of the shaft tube portion 8 of the eye joint 2 is the flow path 7 provided in the inner circumference of the head portion 12 and the flow path provided in the eye joint mounting bolt 28. It communicates with the flow path 26 of the member to be connected 30 through the hole 9 and the flow path 11.

Further, as shown in FIG. 3, after the connecting gasket 13 is locked to the transportation pipe 4 having the eye joint 2, it is difficult to attach the connecting joint member 30 to the connected member 30 by the eye joint attaching bolt 28. Since the gasket 13 can be easily attached even at a portion, the gasket 13 can be prevented from falling off. Further, in the above embodiment, the connecting portion 2
0 is engaged with the shaft tube portion 8 side through the extension portion 18, but the extension portion 18 is not provided as shown in FIG. 4, and the connecting gasket 13 is the mounting end surface of the head 12 of the eye joint 2. The connecting portion 20a is provided so as to connect the seal portions 16 and 16a of the connecting gasket 13 so as to straddle only between 14 and 14a, and the seal portions 16 and 16a on the opposite side of the connecting portion 20a from each other as shown in FIG. Protrusions 25 may be provided so as to face each other, and both seal portions 16 and 16a may be sandwiched by the head 12, and the protrusions 25 and 25a may be locked to the outer periphery of the head 12, as in the above embodiment. It is possible to exert the effect of.

Further, the recess 22 provided in the connecting portion 20 shown in FIG. 1 and the connecting portion 20a shown in FIG. 4 described above.
Connect the gasket 13 with the projection 25 of the eye joint 2
If the head 12 is engaged and locked, it can be securely mounted. Although not shown, among the seal portions 16 and 16a and the extended portions 18 and 18a of the connection gasket 13 of FIG.
There is no one of the above-mentioned sealing portion and extending portion, and the remaining other sealing portion and extending portion and a concave portion 22 as an engaging portion are formed, and the concave portion 22 is formed in the shaft tube portion 8 of the eye joint 2. The other seal portion may be held by being engaged.

Further, in the above embodiment, the seal parts 16, 16
Although a is connected by the connecting portion 20, as shown in the modification of FIG. 5, the seal portion 16 and the seal portion 16a are not connected, and the shaft tube portion 8 is connected to each of the seal portions 16 and 16a.
Even if the ends of the extending portions 18 and 18a extending in the direction are formed in a shape that can be engaged with the shaft tube portion 8 and the ends of the extending portions 18 and 18a are locked by the elastic force, The same operational effect as can be obtained.

Next, another application example of the above embodiment will be described with reference to FIG. The same parts as those in the above embodiment are designated by the same reference numerals, and different points will be described.
In addition, as shown in FIG. 6, the shaft tube portion 8 of the eye joint 2
A groove 36 is provided on the outer periphery of the gasket 16, and the gasket 16,
Even if the protrusions 24 and 24a at the entrance of the recess 22 of the connecting portion 20 bridging the 16a are fitted into and locked in the groove 36,
The same effects as those of the above embodiment can be obtained.

Although not shown, the groove 36 provided in the shaft tube portion 8 of the eye joint 2 shown in FIG. 6 is provided with two grooves above and below the shaft tube portion 8 with a gap in the axial direction. Connection part 2
0 is not provided, and as shown in FIG.
Alternatively, the extended portions 18 and 18a may be independently extended from each other, and the engaging portions at the end portions of the extended portions 18 and 18a may be fitted and locked in the two grooves.

Further, the eye joint mounting bolt 28 may be provided with a bolt portion integrally formed with the transport pipe 014 and the connected member 30 of the present embodiment as shown in FIG. 9 described as a conventional example. The same effects as those of the above embodiment can be obtained.

[0033]

As described above in detail, according to the flow path connecting portion structure of the present invention as set forth in claim 1, a transport pipe having an eye joint is connected to a member to be connected via a gasket by an eye joint mounting bolt. In the structure of the flow path connecting portion to be connected, the gasket mounted on the mounting end surface of the eye joint with which the eye joint mounting bolt head contacts and the mounting end surface of the eye joint with which the connected member contacts. Since the gasket that is provided with an engagement portion for preventing the engagement from engaging with the eye joint side, the transportation pipe engaged and locked with the gas gasket can be attached to the narrow and difficult portion with the eye joint attachment bolt. Even when it is installed, it is possible to prevent the gasket from falling off when it is attached, and it is possible to easily attach it to the connected member. It is possible to improve the efficiency of the work with the serial assembly.

According to the flow path connecting portion structure of the present invention as set forth in claim 2, in the structure as set forth in claim 1, the eye joint of the transport pipe intersects the shaft tube portion and the axis of the shaft tube portion. And an eye joint head having a fitting hole for the eye joint mounting bolt provided in a direction, and the gasket has both fitting holes for the eye joint head. The engaging portion having two seal portions arranged on the end face and a connecting portion bridging both gaskets across the eye joint and provided on the connecting portion and engaged with the eye joint side. Since it is equipped with the above-mentioned gasket, even if the transportation pipe with the above-mentioned gasket engaged and locked is placed in a narrow and difficult-to-install location with the eye joint mounting bolt, it is possible to forget to install the gasket or drop it. Sealed while, can be attached easily to the member to be connected.

According to a third aspect of the present invention, in the structure of the second aspect, the engaging portion formed in the connecting portion is at least one of the shaft tube portion and the eye joint head portion. Since it is configured to be engaged with either one side, the gasket can be mounted on the shaft tube section or the eye joint head section according to the mounting space, so there is flexibility in the piping and layout is easy. The piping can be reliably performed with.

According to the structure of the flow path connecting portion of the present invention described in claim 4, in the structure according to claim 2 or 3, the engaging portion extends from the both sealing portions in the axial pipe portion direction of the eye joint. Since it has a concave portion provided in the connecting portion so as to be extended to and engaged with the axial pipe portion side, the axial pipe portion of the eye joint is fitted into the recess of the connecting portion connecting the two gaskets. As a result, the eye joint and the gasket can be integrated.

Therefore, the head part of the eye joint can be brought into contact with both ends of the head part and inserted from the opening of the protruding part of the concave part of the connecting part so that it can be detachably and easily engaged and locked by the elastic force. It is possible to prevent the gasket from falling off and improve the efficiency of the assembling work. According to the flow path connecting portion structure of the present invention according to claim 5,
In any one of the configurations 1 to 4, since the engaging portion provided on the gasket is configured to be elastically locked to the eye joint side, the connecting gasket to the eye joint side is The attachment / detachment can be easily performed with one touch, the gasket can be prevented from falling off during assembly, and the efficiency of assembly work can be improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a perspective view showing an eye joint and a connecting gasket applied to the flow channel connecting structure of the present invention.

2 is an explanatory view showing an assembling order of an eye joint with which the connecting gasket of FIG. 1 is engaged, and FIG. 2 (a) is a side view showing an assembled state of the connecting gasket and the eye joint. 2B is a side view showing an eye joint mounting bolt of the eye joint of FIG. 2A, and FIG. 2C is an explanatory view showing a connected member to which the eye joint of FIG. 2A is mounted.

FIG. 3 is a vertical cross-sectional view showing a cross section taken along line 3A-3A in FIG.

FIG. 4 is an explanatory diagram showing an application example of the embodiment of the present invention shown in FIG.

FIG. 5 is an explanatory diagram showing a modified example of the embodiment of the present invention shown in FIG.

FIG. 6 is an explanatory diagram showing an application example of the embodiment of the present invention shown in FIG.

FIG. 7 is a schematic side view of the engine showing a case where the conventional flow path connecting portion structure is applied to the engine.

FIG. 8 is a schematic explanatory diagram showing an arrow Y of FIG.

FIG. 9 is a vertical cross-sectional view showing another conventional flow path connecting portion structure.

FIG. 10 is a plan view showing another conventional flow path connecting portion structure.

11 is a front view of FIG.

[Explanation of symbols]

 2 Eye Joint 4 Transport Pipe 6 Flow Path 8 Shaft Pipe 10 Fitting Hole 12 Eye Joint Head 13 Gasket (Connecting Gasket) 14 Eye Joint Mounting End Face 14a Eye Joint Mounting End Face 15 Mounting Hole 13 Connecting Gasket 16 Sealing Part 16a Seal part 18 Extension part 18a Extension part 20 Connection part 22 Recessed part as an engaging part 24 Projection part 26 Flow path 28 Eye joint mounting bolt 30 Connected member 32 Screw hole 36 Groove

Claims (5)

[Claims] 1. A flow path connecting structure for connecting a transport pipe having an eye joint to a member to be connected through a gasket with an eye joint mounting bolt, wherein the eye joint mounting bolt head is in contact with the eye joint mounting head. The gasket installed on the mounting end surface and the gasket installed on the mounting end surface of the eye joint with which the member to be connected abuts are provided with engagement portions for preventing the engagement that engage with the eye joint side. A feature is a flow passage connecting portion structure. 2. The eye joint of the transportation pipe is composed of a shaft pipe portion and an eye joint head having a fitting hole for the eye joint mounting bolt which is provided in a direction intersecting an axis of the shaft pipe portion. The gasket bridges the two seal portions arranged on both mounting end faces of the eye joint head having the fitting holes for the eye joint head and the gaskets straddling the eye joint. And a coupling portion which is provided with the coupling portion, which is provided in the coupling portion and is engaged with the eye joint side,
The flow channel connecting portion structure according to claim 1. 3. The engaging portion formed on the connecting portion is configured to engage with at least one of the shaft tube portion and the eye joint head portion. The flow path connecting portion structure described. 4. The engagement portion has a recess extending from both the seal portions in the axial pipe portion direction of the eye joint and provided in the coupling portion so as to engage with the axial pipe portion side. The flow path connecting portion structure according to claim 2 or 3, characterized in that. 5. The engaging portion provided on the gasket is configured to be elastically locked to the eye joint side, according to any one of claims 1 to 4. Flow path connection structure.