JP2009281457A - Relay joint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay joint reducing the size, simplifying mounting work and sufficiently usable even in an environment to which vibration is transmitted. <P>SOLUTION: In the relay joint 10, cylindrical bodies 12, 14 are arranged on the outdoor side of a storage body 130b, and cylindrical bodies 13, 15 are arranged on the indoor side of the storage body 130b. In this layout, the relay joint 10 is fixed to a boss part 130c of the storage body 130b. At this time, a boss BS formed on a plate-shaped body 11 is fitted into an opening part HL, and then the relay joint 10 is fixed by bolts BT. Since a plurality of communication bodies are formed in the relay joint 10, it is not required to mount a large number of relay joints, thus reducing the number of components mounted to the storage body 130a. Moreover, since fixing means 16 are provided in the relay joint 10, the plurality of communication bodies are fixed to predetermined places by once fixation work, reducing complicated work for fastening a fixation tool. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a relay joint, and is particularly suitable for use in an environment where vibration is continuously transmitted.

  2. Description of the Related Art Conventionally, a number of relay joints that connect stretchable tubes such as silicon tubes to each other and relay the fluid in the tube or the pressure of the fluid so as to be able to come and go have been commercialized as practical products.

  For example, in a connection joint (Patent Document 1) disclosed in Japanese Patent Application Laid-Open No. 2004-183687 (patent document 1), a connection joint including a plurality of fluid or a pressure transmission path of the fluid is introduced. Such a connection joint includes an intermediate structure (a plate-like body in the claims) composed of an intermediate portion and a coupling body, and a plurality of joint portions (communications in the claims) that connect the front and back surfaces of the intermediate structure. The intermediate structure and the plurality of joint portions are integrally formed.

JP 2004-183687 A

However, in the technique of Patent Document 1, when one space separated by the wall surface is communicated with the other space, no fixing means is provided in the intermediate structure of the connection joint, so the connection joint is fixed to the wall surface. It is difficult to do.

  Moreover, although the construction method which seal-bonds the intermediate structure of a connection joint to the opening part formed in the wall surface is also considered, in this construction method, the problem that the operation | work which fixes a connection joint to a wall surface will become complicated. In addition, in an apparatus mounted on a vehicle, when the apparatus is arranged in a state exposed to the outside of the vehicle body, rain water or cleaning water sprayed at the time of washing the car infiltrates the apparatus and causes electric leakage inside the relay terminal. The problem also arises.

  Furthermore, in an environment where vibrations and the like are continuously transmitted, there arises a problem that the connected tube easily falls off. In particular, an apparatus mounted on a vehicle is arranged in an extremely harsh environment that is constantly subjected to vibration when the vehicle is driven. At this time, it is preferable that a restraint such as a tube band is not used.

  In addition to the downsizing of connection joints (relay joints in claims), there is a strong demand in each market for connection joints that can solve these problems all at once.

  SUMMARY OF THE INVENTION In view of the above problems, the present invention aims to provide a relay joint that can be used in an environment in which vibrations are transmitted, as well as miniaturization and simplification of installation work.

  In order to solve the above problems, the present invention has the following relay joint configuration. That is, an end-side cylindrical portion having a substantially cylindrical shape and a plate-side cylindrical portion disposed between the end-side cylindrical portion and the plate-like body are integrally formed, and the end-side from the plate-side cylindrical portion. In the relay joint including a plurality of cylindrical bodies formed with stepped portions that rapidly expand the outer peripheral shape toward the cylindrical portion, the plate-like body includes a front surface of the plate-like body among the plurality of cylindrical bodies. A front-side cylindrical body arranged on the side and a plurality of the cylindrical bodies arranged on the back side of the front-side side through the inner hole portion of the front-side cylindrical body and the front-side space and the back-side side A plurality of communication bodies each including a back side tubular body that communicates the space are integrally formed, and a fixing means is provided for fixing to a wall surface that separates the space on the front side and the space on the back side. Suppose that

  Preferably, the outer peripheral shape of the end-side tube portion is a shape that gradually expands from the end portion of the end-side tube portion toward the stepped portion.

  Preferably, the plate-side tube portion is formed with a contact surface in a direction in which the plate-like body is arranged, and the contact surface has a shape that expands more rapidly than the outer peripheral shape of the plate-side tube portion. .

  Preferably, the plate-like body is provided with a sealing means.

  Preferably, the wall surface is a partial region of a housing constituting the vehicle control device.

  According to the relay joint according to the present invention, since a plurality of communicating members are formed in the relay joint, the number of parts can be reduced.

  In addition, since such a relay joint is provided with a fixing means, a plurality of communicating members can be fixed to a predetermined place by a single fixing operation, and the mounting operation can be simplified. In addition, since the relay means is provided with a sealing means, water can be prevented from entering from the outside.

  Furthermore, according to the relay joint fixed to the vehicle control device, the pressure detection tube is difficult to come off, so that the connection between the relay joint and the pressure detection tube is maintained even in a vehicle where vibration is continuously transmitted. .

  In addition, the device provided in the vehicle is required to be downsized. However, the relay joint reduces the number of components attached to the vehicle control device, and therefore, it is considered to meet such a requirement.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a relay joint 10 used in the present embodiment. The relay joint 10 is an insulating thermoplastic resin mainly composed of PBT (Poly Butylene Terephthalate) or PET (Poly Ethylene Terephthalate), PPS (Poly Phenylene Sulfide), PPO (Poly Phenylene Oxide), PS (Poly Styrene), and the like. The plate-like body 11 and the plurality of cylindrical bodies 12 to 15 are integrally formed.

  As for the cylindrical body 12, the end side cylinder part 12a and the plate side cylinder part 12b are integrally formed. Among these, the end side cylinder part 12a comprises a substantially cylindrical shape, and is made into the shape of a truncated cone in this Embodiment. The plate side cylinder part 12 b is arranged between the end side cylinder part 12 a and the plate-like body 11. Since the end-side tube portion 12a and the plate-side tube portion 12b are different from each other in outer peripheral shape and are integrated with each other, a step portion is formed in the adjacent portion as shown in the figure. Such a stepped portion rapidly expands the outer peripheral shape of the cylindrical body 12 from the plate side cylindrical portion 12b toward the end side cylindrical portion 12a. Since such a stepped portion is formed in the cylindrical body 12, when a tube having elasticity is inserted into the cylindrical body 12a, if a force for pulling out the tube is applied thereafter, the reverse of the force is applied. Give resistance to the direction. In addition, as shown in the drawing, the cylindrical body 12 has an inner hole portion Sb that is aligned with the axial direction of the cylindrical body 12.

  The cylindrical body 14 has the same shape as the cylindrical body 12 described above. However, in the present embodiment, the outer peripheral shape of the cylindrical body 14 is larger than the outer peripheral shape of the cylindrical body 12 as illustrated. By changing the size of the cylindrical body as described above, it is possible to prevent erroneous insertion of the tube.

  The cylindrical body 13 is integrally formed with an end-side cylinder portion 13a, a plate-side cylinder portion 13b, and a rapidly expanding cylinder portion 13c. Among these, the end side cylinder part 13a and the plate | board side cylinder part 13b are the same as that of the structure in the cylindrical body 12 mentioned above. The rapidly expanding cylinder portion 13 c is formed between the plate side cylinder portion 13 b and the plate-like body 11. At this time, in the portion where the rapidly expanding cylinder part 13c and the plate side cylinder part 13b are adjacent to each other, the suddenly expanding cylinder part 13c and the plate side cylinder part 13b are integrally formed, so that the stepped contact surface is formed. It is formed. Since the abutting surface is formed in a certain range in a plane that expands more rapidly than the outer peripheral shape of the plate-side cylinder portion 13b, when the tube is inserted into the cylindrical body 13, the end surface of the tube becomes the cylindrical body 13 Thus, the tube to be connected is appropriately positioned in the cylindrical body 13. The cylindrical body 13 is perforated with an inner hole Sc (not shown).

  In the present embodiment, the cylindrical body 15 has the same shape and size as the cylindrical body 13 described above. Even in the cylindrical body 15, an inner hole Sd (not shown) is perforated.

  Since the cylindrical bodies 12 to 15 are formed with truncated cone-shaped end side cylinder parts 12 a to 15 a, the outer peripheral shape gradually increases from the end parts of the end side cylinder parts 12 a to 15 a toward the plate-like body 11. Expanding. Therefore, in the cylindrical bodies 12 to 15, the tube can be easily inserted, and the stepped portion is formed by the end side tubular portion and the plate side tubular portion. It is difficult. Here, when a tube is inserted into the cylindrical bodies 12 to 15, a binding band or the like may be attached between the stepped portion and the plate-like body 11. Thereby, the coupling | bonding of the said cylindrical body and a tube is made stronger.

  As shown in the figure, the plate-like body 11 has a substantially rectangular shape having a predetermined plate thickness, and the cylindrical bodies 12 to 15 are integrally formed. The plate-like body 11 is appropriately provided with fixing means 16 and pins Pn. More specifically, the fixing means 16 is a through hole that penetrates the front side A to the back side B. Since the through hole is fastened together with a fastener such as a bolt and nut, it is preferable to embed a metal piece in the plate-like body 11 and perforate the metal piece. Thereby, the structure of the plate-like body 11 is protected and the fixed state of the bolt is well maintained. Further, the pin Pn is formed in a small diameter cylindrical body, and a plurality of pins Pn are provided on the back side of the plate-like body 11. The pin Pn is correctly positioned when the plate-like body 11 is fixed to a wall surface WL or a housing of the vehicle control device 130 described later, thereby bringing the fixing means 16 and the cylindrical bodies 12 to 15 to desired positions. Let the layout.

  In this plate-like body 11, the cylindrical body 12 formed on the front side A and the cylindrical body 13 formed on the back side are laid out in pairs, and the two cylindrical bodies 12 and 13 form a pair. It is one communicator. In addition, the cylindrical body 14 formed on the front side A and the cylindrical body 15 formed on the back side B are laid out in pairs, and one communicating body is formed by the two cylindrical bodies 14 and 15. It is made. That is, in the plate-like body 11 according to the present embodiment, a plurality of communicating bodies are formed as described above. In such a communicating body, the inner hole portion drilled in the front side A and the inner hole portion drilled in the back side B are connected inside, so that the fluid filled in the inner hole portion is the front side A. -The back side B can be freely moved.

  FIG. 2 shows an arrangement example in which the relay joint 10 is fixed to a predetermined wall surface WL. In addition, the same figure has shown the cross section of a suitable position so that inner-hole part Sa-Sd pierced by each cylindrical body 12-15 can be observed. As illustrated, the wall surface WL to which the relay joint 10 is fixed has a rectangular opening HL. The wall surface WL is further formed with a female screw tap for screwing the bolt BT.

  When the relay joint 10 is fixed to the wall surface WL, the cylindrical bodies 13 and 15 formed on the back side B are inserted into the opening HL. At this time, a rectangular boss Bs formed on the back side B of the plate-like body 11 is fitted into the opening HL, and a pin Pn (not shown) is inserted at an appropriate position on the wall surface WL, thereby The plurality of communicating bodies composed of the state bodies 12 to 15 are positioned at appropriate positions of the opening HL. Moreover, the through hole 16 formed in the plate-like body 11 and the through hole formed in the wall surface WL coincide. Then, the bolt BT is inserted from the front side A of the through hole and screwed to the female screw tap formed on the wall surface WL. Furthermore, the relay joint 10 according to the present embodiment is provided with a sealing means on the back side B of the plate-like body 11. Specifically, in such a sealing means, an O-ring groove is formed around the boss Bs, and an O-ring of an appropriate standard is embedded in the O-ring groove. Airtightness is ensured. In this embodiment, an O-ring is used as the sealing means. However, the present invention is not limited to this, and a flat packing may be used. Here, the material of the member used as the sealing means is preferably selected from fluorine-based synthetic rubber. Thereby, even if fuel, such as gasoline, or exhaust gas adheres, a deterioration rate is suppressed remarkably compared with fluororubber.

  When the plate-like body 11 is fixed to the wall surface WL as described above, one end of the communicating body is disposed on the front side A and the other end is disposed on the back side B. Therefore, the communicating body is disposed on the front side A. The space and the space arranged on the back side B are communicated with each other through the inner hole portion. More specifically, in the communication body composed of the cylindrical body 12 and the cylindrical body 13, the inner hole portion Sb drilled in the cylindrical body 12 and the inner hole portion Sd drilled in the cylindrical body 13 are connected to each other. Since they are connected inside the through body, the space on the front side A and the space on the back side B are communicated with each other through these inner holes. Further, in the communication body composed of the cylindrical body 14 and the cylindrical body 15, the inner hole portion Sa of the cylindrical body 14 and the inner hole portion Sc of the cylindrical body 15 are connected inside the communication body. The space on the front side A and the space on the back side B communicate with each other through these inner hole portions.

  As described above, according to the relay joint 10 according to the present embodiment, since a plurality of communicating members are formed in the relay joint 10, the number of parts can be reduced.

  Further, since the relay joint 10 is provided with the fixing means 16, it is possible to fix a plurality of communicating bodies to a predetermined place by a single fixing operation, and the mounting operation can be simplified. In addition, since the relay means is provided with a sealing means, water can be prevented from entering from the outside.

  Hereinafter, the present Example demonstrates the more specific usage example of the relay coupling 10 mentioned above. FIG. 3 shows the configuration of an exhaust gas purification system for an internal combustion engine according to this embodiment. The exhaust gas purification system 100 includes an internal combustion engine 110, a DPF device 120, a vehicle control device 130, a silencer 140, and an in-vehicle battery 150.

  The internal combustion engine 110 is a diesel engine driven using light oil or heavy oil, and mainly includes vehicles (including large vehicles such as trucks and buses, railway vehicles), construction machinery, agricultural machinery, ships, military vehicles, and the like. Applies to

  The DPF device 120 incorporates a DPF (Diesel Particulate Filter), and reduces particulates (carbonized fine particles and the like) contained in the exhaust gas of the diesel engine. In this embodiment, the alternate regeneration method is adopted as the DPF regeneration method. However, the present invention is not limited to this, and a regeneration method such as a continuous regeneration method or an intermittent regeneration method may be employed.

  The vehicle control device 130 is a device mounted on the vehicle body and stores a circuit for driving the DPF device 120. The vehicle control device 130 may be integrated in an ECU (Engine Control Unit) that controls the internal combustion engine.

  The muffler 140 is appropriately configured with a muffler structure, and reduces the exhaust discharge sound of the internal combustion engine. The exhaust gas that has passed through the silencer 140 is released to the outside air. The in-vehicle battery 150 is mounted at an appropriate position on the vehicle and supplies power to the vehicle control device 130.

  In the exhaust gas purification system 100 having such a configuration, when exhaust gas is discharged from the internal combustion engine 110, the exhaust gas passes through the connection pipe CP and is guided to the DPF device 120. At this time, the DPF device 120 is driven based on a command from the vehicle control device 130, whereby particulates are adsorbed to the exhaust gas by the DPF, and contaminants contained in the exhaust gas are reduced to a predetermined value. The Thereafter, the purified exhaust gas is guided to the silencer 140, and after being silenced, is discharged to the outside air.

  FIG. 2 shows the internal configuration of the DPF device 120 and the vehicle control device 130 described above, and these configurations will be specifically described below.

  In the DPF device 120, a connection pipe CP connected to the internal combustion engine 110 is drawn into the housing. The DPF device 120 stores a discharge terminal 170 and a filter DPF. The discharge terminal 170 is electrically connected to the power supply line La via the high-voltage terminal 160. When power is supplied from the power supply line La, the discharge terminal 170 generates corona discharge and ionizes the molecules of the exhaust gas that passes therethrough. The filter DPF is made of a porous ceramic body or a porous metal body such as stainless steel, and adsorbs particulates contained in the exhaust gas. The filter DPF is provided with a heater, and the heater burns the adsorbed particulates to regenerate the adsorption performance of the filter DPF. Furthermore, pressure detection tubes ta and tb for detecting a differential pressure before and after the filter DPF are provided on the upstream side and the downstream side of the filter DPF. The pressure detection tubes ta and tb are connected to appropriate portions of the vehicle control device 130 as shown in the figure.

  The vehicle control device 130 is connected to the in-vehicle battery 150, and power is supplied from the in-vehicle battery 150. The vehicle control device 130 includes a power supply circuit 131 and a control circuit 132 in the room. The power supply circuit 131 appropriately adjusts the power supplied from the in-vehicle battery 150 and supplies the high voltage power to the high voltage terminal 160 of the DPF device 120. The control circuit 132 detects the differential pressure before and after the DPF, and defines the operation of the vehicle control device 130 based on the detected value of the differential pressure. More specifically, the relay joint 10 is provided in the housing of the vehicle control device 130 as shown in the figure. Then, pressure detection tubes ta and tb provided in the DPF device 120 are fitted into the cylindrical body disposed on the front side of the relay joint 10. On the other hand, pressure detection tubes tc and td connected to the pressure sensor of the control circuit 132 are connected to the cylindrical body disposed on the back side of the relay joint 10. The pressure sensor connected to the pressure detection tube tc detects the pressure on the upstream side of the DPF via the pressure detection tube ta. In addition, the pressure sensor connected to the pressure detection tube td detects the pressure on the downstream side of the DPF via the pressure detection tube tb.

  The exhaust gas purification system having such a configuration operates as follows. That is, when exhaust gas containing particulates is supplied from the internal combustion engine, the exhaust gas is guided to the discharge terminal 170 through the connection pipe CP. At the same time, the vehicle control device 130 supplies electric power adjusted to a desired value to the high-voltage terminal 160 and generates corona discharge at the discharge terminal 170. At this time, the particulates contained in the exhaust gas are ionized according to the corona discharge, so that they are easily adsorbed by the porous body when passing through the filter DPF. The exhaust gas in such a state is guided to the filter DPF, subjected to particulate adsorption processing, and then guided to the silencer 140 through the connection pipe CP.

  In FIG. 4, the relay joint according to the present embodiment is attached to a part of the housing of the vehicle control device 130 (“partial region of the housing constituting the vehicle control device” in the claims). An example layout is shown. In the vehicle control device 130, the power supply circuit 131 and the control circuit 132 described above are housed in a housing. As shown in the figure, the casing is composed of a lid body 130a and a housing body 130b, and the housing body 130b forms a box-like body in which an opening is formed at a portion to which the lid body 130a is attached. A rectangular boss portion 130c is integrally formed with the storage body 130b. The boss portion 130c is formed with a female screw tap to which a rectangular opening HL and a bolt BT (not shown) are screwed. The relay joint 10 is attached to the storage body 130b in a state where the cylindrical bodies 12 and 14 are exposed to the outside of the storage body 130b.

  FIG. 5 shows the vehicle control device 130 observed from the lid 130a. In addition, in the same figure, the cross section of the appropriate position where inner-hole part Sa-Sd can be observed in the periphery of the relay joint 10 is shown.

  As shown in the drawing, the relay joint 10 has cylindrical bodies 12 and 14 arranged on the outdoor side of the storage body 130b, and cylindrical bodies 13 and 15 are arranged on the indoor side of the storage body 130b. The boss portion 130c is fixed. At this time, in the relay joint 10, the boss BS and the pin Pn formed on the plate-like body 11 are fitted into the housing, and then fixed by the bolt BT. Here, since the O-ring Or is arranged in the relay joint 10, the airtightness on the indoor side in the vehicle control device 130 is ensured, and accordingly, the circuit board disposed inside the vehicle control device 130. Is protected. Furthermore, since the relay joint 10 is formed with a plurality of communication bodies made of a cylindrical body, it is not necessary to attach many relay joints, thereby reducing the number of parts attached to the storage body 130a. . Further, since the relay joint 10 is provided with the fixing means 16, it is possible to fix a plurality of communicating bodies to a predetermined place by a single fixing operation, and there is less complicated operation for fastening the fixing tool. Become.

  A control circuit 132 is laid out in the vicinity of the cylindrical bodies 13 and 15 inside the storage body 130b. In the control circuit 132, pressure sensors Sp1 and Sp2, a connector terminal Cn, a CPU or a memory circuit, and the like are appropriately mounted. A measurement element such as a diaphragm gauge or a strain gauge is used for the pressure sensor. Then, the control circuit 132 calculates the difference between the detection value of the pressure sensor Sp1 and the detection value of the pressure sensor Sp2, and executes an appropriate process based on the differential pressure value obtained thereby.

  In the relay joint 10 thus fixed, the pressure detection tube ta is inserted into the cylindrical body 12, the pressure detection tube tc is inserted into the cylindrical body 13, and the pressure detection tube tb is inserted into the cylindrical body 14. The pressure detection tubes td are inserted into the cylindrical body 15, and the pressure detection tubes ta to td are fixed to the relay joint 10. The pressure detection tubes ta and td are shown in cross-section at the connection point with the relay joint 10, but are external views at the connection points with the pressure sensors Sp1 and Sp2. The pressure detection tubes ta to td are made of a resin material having elasticity, and for example, a product composed of a synthetic resin such as silicon or viton is used. The other end of the pressure detection tube ta is disposed on the DPF inflow side in the DPF device 120, and the other end of the pressure detection tube tc is connected to the pressure sensor Sp1 on the control circuit. With this configuration, the pressure on the inflow side of the DPF is transmitted to the pressure detection tube tc via the pressure detection tube ta and the inner hole portions Sa and Sc. Thus, in the pressure sensor Sp1, the pressure on the outflow side of the DPF Is detected. On the other hand, the other end of the pressure detection tube tb is disposed on the outflow side of the DPF, and the other end of the pressure detection tube td is connected to the pressure sensor Sp2. With this configuration, the pressure on the outflow side of the DPF is transmitted to the pressure detection tube td via the pressure detection tube tb and the inner hole portions Sb and Sd. Thus, in the pressure sensor Sp2, the pressure on the outflow side of the DPF Is detected.

  As described above, according to the relay joint 10 according to the present embodiment, since the pressure detection tubes ta to td are formed in the cylindrical bodies 12 to 15 that are difficult to be removed, even in a vehicle in which vibration is continuously transmitted, The connection state between the relay joint 10 and the pressure detection tubes ta to td is maintained.

  Moreover, since the apparatus provided in the vehicle is required to be reduced in size, the relay joint 10 reduces the number of components attached to the vehicle control device 130, and thus meets the request.

The figure which shows the structure of the relay coupling which concerns on embodiment The figure which shows the fixed state of a relay joint and a wall surface The figure which shows the structure of the exhaust gas purification system of the internal combustion engine which concerns on an Example. The figure which shows the example of installation of the relay joint used in the Example The figure which shows the fixed state of a relay joint and the wall surface of a housing | casing

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Junction joint 11 Plate body 12 Front side cylindrical body 12a End side cylinder part 12b Plate side cylinder part 13 Back side cylindrical body 13a End side cylinder part 13b Plate side cylinder part 14 Front side cylindrical body 14a End side cylinder part 14b Plate side cylinder part 15 Back side cylindrical body 15a End side cylinder part 15b Plate side cylinder part Sa Inner hole part Sb Inner hole part A Front side B Rear side 130 Vehicle control device

Claims (5)

An end-side tube portion having a substantially cylindrical shape and a plate-side tube portion disposed between the end-side tube portion and the plate-like body are integrally formed, and the end-side tube portion is formed from the plate-side tube portion. In the relay joint comprising a plurality of cylindrical bodies formed with stepped portions that rapidly expand the outer peripheral shape toward the
Among the plurality of cylindrical bodies, the front side cylindrical body arranged on the front side of the plate-like body and the front side of the plurality of cylindrical bodies are arranged on the back side of the front side. A plurality of communication bodies each including a back side cylindrical body that communicates the space on the front side and the space on the back side through the inner hole portion of the side cylindrical body are integrally formed, and the front side A relay joint comprising a fixing means for fixing to a wall surface that separates the space and the space on the back side.   2. The relay joint according to claim 1, wherein an outer peripheral shape of the end-side tube portion is a shape that gradually expands from a terminal portion of the end-side tube portion toward the stepped portion. The plate-side cylinder portion has a contact surface in a direction in which the plate-like body is arranged,
The relay joint according to claim 1, wherein the contact surface has a shape that expands more rapidly than the outer peripheral shape of the plate-side tube portion.   The relay joint according to any one of claims 1 to 3, wherein the plate-like body is provided with sealing means.   The relay joint according to any one of claims 1 to 4, wherein the wall surface is a partial region of a housing constituting the vehicle control device.

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