JP2006082611A - Trailer vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a trailer vehicle having a connector capable of performing automatic connection of a feed pipe for the power, the pneumatic pressure, the hydraulic pressure or the like. <P>SOLUTION: The trailer vehicle has a connection device to connect a trailer to a tractor by fitting a king pin of the trailer b to a coupler of the tractor a. A lower connector body 62 is arranged below a space part between king pin guides 61, 61 of the coupler 6. An upper connector body 72 similarly having an individual connector is arranged behind a king pin 7. The position of arrangement of the upper connector body 72 is set so as to be located immediately above the lower connector body 62 when the king pin 7 is attached to the coupler 6. Individual connectors having individual connectors 62a, 62b, 62c for feeding the power, the hydraulic pressure and the pneumatic pressure are arranged on respective opposing surfaces of the lower connector body 62 and the upper connector body 72 in an opposing manner so as to be connected to each other. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a semi-trailer type trailer vehicle, and more particularly to an improvement in a trailer / tractor coupling device.

  Conventionally, in a semi-trailer type trailer vehicle, as illustrated in FIGS. 6, 7, and 8, to connect the tractor a and the trailer b, a gap between the king pin guides of the coupler a <b> 1 disposed on the vehicle body of the tractor a. In addition, the king pin b1 protruding from the lower surface of the vehicle body of the trailer b is usually guided, fitted, and locked. (See Patent Document 1)

The vehicle body connection operation itself is performed almost automatically by the driver moving the tractor a. However, it is necessary to supply electricity, pneumatic pressure, hydraulic pressure, etc. from the tractor a side to the trailer b side. It was necessary to connect the pipe a2. This connection piping is difficult to automate, and the operator must perform the connection work directly, but it is an outdoor work, and it is also an operation that is subject to heat and cold, and sometimes exposed to wind and rain. Was requested. In particular, when connecting hydraulic pipes, oil leakage occurs when connecting or disconnecting, and the surrounding area is soiled. Therefore, development of connection pipes that are less likely to cause oil leakage has been desired.
Japanese Patent Laid-Open No. 9-86454: FIG.

  The present invention has been made to solve the above-described problems, and firstly provides a trailer vehicle having a connector that enables automatic connection of supply pipes such as electricity, pneumatic pressure, and hydraulic pressure. . Then, the connector structure for hydraulic piping which is hard to produce to the oil leak which can be applied to a connector suitable for such a trailer vehicle is provided.

  In the trailer vehicle having a connecting device for connecting the trailer and the tractor by fitting the king pin projecting on the lower surface of the trailer to the coupler disposed on the upper surface of the tractor body, the king pin of the coupler The lower connector body is disposed below the gap between the guides, and the upper connector body is disposed behind the king pin so that the upper connector body is positioned immediately above the lower connector body when the king pin is fitted to the coupler. In addition, on the respective opposing surfaces of the lower connector body and the upper connector body, individual connectors for supplying at least one of electricity, hydraulic pressure, and pneumatic pressure are arranged to face each other so as to be connectable to each other. This can be solved by the trailer vehicle of the present invention.

Further, the present invention provides the first embodiment, that is, the lower connector main body is suspended from the king pin guide of the coupler, and includes an elevating means, and the individual connector disposed is pushed up and lowered to lower the upper connector body. It is embodied in a form that can be connected to and disconnected from each individual connector of the connector.
Further, the present invention is the second embodiment, that is, a plurality of positioning pins project from the opposing surface of one connector body of the lower or upper connector body, and the other connector body is fitted to the positioning pin. The embodiment is embodied in a form in which a positioning recess is provided.

Furthermore, the present invention provides a third embodiment, that is, a rotating member that can be rotated about the king pin as an axis, is disposed on the lower surface of the trailer vehicle body, and the upper connector main body is attached to the rotating member to attach the king pin. The rotary member is pivotally arranged, and a return spring is attached to the rotary member, and the upper connector main body is urged so as to be automatically positioned behind the king pin.
In this case, it is preferable that the rotating member is rotatable by interposing a thrust bearing member on the trailer vehicle body. Moreover, it is preferable to provide the leg provided in the vehicle body lower surface of the said trailer with the electric motor which can be expanded-contracted.

  Further, in the fourth form of the connector according to the present invention, that is, the individual connector for supplying hydraulic pressure is rotatable with a pair of connection ports that are in contact with each other so as to be connected and disconnected, and having a rotation shaft portion driven from outside A valve built-in pipe joint provided with a disk-shaped valve body, the disk-shaped valve body being configured to be divided into two at right angles to the thickness direction, and when the pipe joint is separated, the disk-shaped valve body is The two split valve bodies are arranged so as to close one connecting port, the other divided valve body is arranged so as to close the other connecting port, and when this pipe joint is connected, The divided valve body rotates integrally, and the closed connection port is opened so that a communication flow path can be formed. A fixing pin means for fixing the divided valve body to each connection port is provided. Equipped with automatic valve body when connected or disconnected And it closes the link mechanism, the individual connector provided with the link mechanism for automatically operating the fixing pin is preferably applied.

  In the present invention, when connecting the trailer and the tractor, when the king pin on the trailer side and the coupler on the tractor side are fitted, the upper connector body and the lower connector body arranged on each are positioned vertically so that they can be joined. There is an advantage that individual connectors for supplying electricity, hydraulic pressure, pneumatic pressure and the like can be automatically connected.

In the first embodiment, since the connector on the tractor side can be raised and lowered, there is an advantage that the connecting operation can be performed from the tractor side which is a supply source of electricity, hydraulic pressure, pneumatic pressure and the like.
Moreover, in the said 2nd form, since the several positioning pin and the positioning recessed part were provided in the opposing surface of the said lower connector main body or the upper connector main body, the advantage that an individual connector can be connected in an exact position is acquired.

  In the third embodiment, the upper connector main body is urged so as to be rotatable about the king pin and automatically positioned behind the king pin by a return spring. In this case, even if the retracting direction of the tractor is slightly deviated, there is an advantage that there is no problem in the connection of the upper and lower connector bodies. Further, if a thrust bearing member is interposed on the kingpin side, it is preferable for supporting a large load such as a trailer. In addition, since the leg provided on the lower surface of the vehicle body of the trailer can be electrically extended and contracted, there is an advantage that the operation at the time of connection is easy.

  Furthermore, if the valve joint with a built-in valve of the fourth embodiment is applied as an individual connector for supplying hydraulic pressure, when connecting / disconnecting, the opening / closing operation of the connection port by the split valve body and the fixing / release of the connection port are performed. Can be automatically operated by a link mechanism. In addition, since it is difficult for oil to enter between the divided valve bodies during operation, there is an advantage that leakage of residual oil can be prevented during opening and closing.

  As described above, the present invention provides a trailer vehicle including a connector that enables automatic connection of supply pipes such as electricity, pneumatic pressure, and hydraulic pressure. Furthermore, it is possible to provide a connector structure for hydraulic piping that is less likely to cause oil leakage and can be applied to a connector suitable for a trailer vehicle. Thus, according to the present invention, there is an excellent effect that the work of connecting the trailer and the tractor can be solved. Therefore, the present invention has a very large practical value as a trailer vehicle that has solved the conventional problems.

Next, an embodiment according to the trailer vehicle of the present invention will be described with reference to FIGS. 1 to 5 and FIGS.
(Main embodiment)
The present invention is a semi-trailer type equipped with a connecting device for connecting the trailer b and the tractor a by fitting a king pin protruding from the lower surface of the vehicle body of the trailer b and a coupler disposed on the upper surface of the vehicle body of the tractor a. It is common to the previous point in that it targets the trailer vehicle.

The features of the present invention are as follows.
1) As shown in FIG. 1, a lower connector main body 62 is disposed below a gap portion between the kingpin guides 61 and 61 of the coupler 6. As shown in FIG. 3, the lower connector main body 62 is provided with individual connectors 62a, 62b and 62c for supplying electricity, hydraulic pressure and pneumatic pressure. The electrical, hydraulic and pneumatic pipes are collected in a focusing pipe 62e and connected to each individual connector.
2) As shown in FIG. 2, the upper connector main body 72 is disposed behind the king pin 7. The upper connector main body 72 is also provided with individual connectors (not shown) similar to the lower connector main body 62. The electric, hydraulic and pneumatic pipes are collected in the converging part 72e and drawn into the vehicle body.

  3) The upper connector main body 72 is disposed such that when the king pin 7 is fitted to the coupler 6, the upper connector main body 72 is positioned immediately above the lower connector main body 62 on the coupler side. That is, the positional relationship is determined so that the horizontal distance L6 from the fitting center of the kingpin guide 61 to the center of the lower connector body 62 is equal to the horizontal distance L7 from the center of the kingpin 7 to the center of the upper connector body 72.

  4) On the opposing surfaces of the lower connector body 62 and the upper connector body 72, the individual connectors described above are arranged so as to face each other so that they can be connected to each other. That is, the positional relationship is determined such that when the opposing surfaces of the lower connector main body 62 and the upper connector main body 72 are overlapped, the individual connectors on the opposing surface can be connected.

  In FIG. 3, individual connectors 62a, 62b, and 62c for supplying electricity, hydraulic pressure, and pneumatic pressure are illustrated. However, in the present invention, at least one type of individual connector for electrical, hydraulic, and pneumatic pressure is used. It is essential to provide them, and all of them are not necessarily required. In addition, as the individual connector, known connection means such as a connection joint in which a circuit such as electricity, hydraulic pressure or pneumatic pressure is opened by pressing each other and the circuit is closed by being separated from each other is used.

  In the present invention, when the trailer b and the tractor a are connected as shown in FIG. 8, when the king pin 7 on the trailer side and the coupler 6 on the tractor side are fitted together, the upper connector main body 72 and the lower connector main body 72 attached and arranged respectively are The connector main body 62 is arranged in a vertical positional relationship where the opposing surfaces can be joined, and is suitable for automatically pressing and connecting the individual connectors for supplying electricity, hydraulic pressure, pneumatic pressure, etc. There are benefits to be gained.

(First embodiment)
In the first embodiment of the present invention, as shown in FIG. 1B, the lower connector main body 62 is suspended from both sides of the king pin guide 61 of the coupler 6. Furthermore, an elevating device 62f such as an electric motor type or a hydraulic cylinder type is provided inside, and a base portion including individual connectors 62a, 62b, 62c for electric, hydraulic, and pneumatic, which are disposed on the lower connector 62. 62g is pushed up and can be connected to each individual connector (not shown) on the upper connector 72 side.

  In the first embodiment, since the lower connector 62 on the tractor side can be moved up and down in this way, when connecting the upper and lower individual connectors, a connecting operation is performed from the tractor side that is a supply source of electricity, hydraulic pressure, pneumatic pressure, and the like. In addition to the advantage that can be performed, there is an advantage that the connecting operation can be performed by a simple push-up operation.

(Second Embodiment)
In the second embodiment of the present invention, as shown in FIG. 3, a plurality of positioning pins 62d (four are illustrated in FIG. 3) are provided on the opposing surface of the lower connector body 62, and the other upper The connector body 72 is embodied in a form in which a positioning recess (not shown) for fitting with the positioning pin is provided. In this case, it goes without saying that the positioning pin and the positioning recess may be interchanged up and down.

  In the second embodiment, since a plurality of positioning pins and positioning recesses are provided on the opposing surfaces of the lower connector main body and the upper connector main body, there is an advantage that the individual connectors can be connected at an accurate position when connecting the connectors. .

(Third embodiment)
3rd Embodiment of this invention is a part regarding the attachment structure to the vehicle body of the king pin 7 and the upper connector main body 72. FIG. In this embodiment, a rotating member 71 that is rotatable about a king pin 7 projecting downward is arranged on the lower surface 73 of the trailer vehicle body. In this example, a rotating member 71 is attached to a shaft housing 73 a fixed to the lower surface 73 of the vehicle body via a thrust bearing member 74.

  The upper connector main body 72 is attached to the rear side away from the kingpin 7 by L7 and directed downward. Thus, the upper connector main body 72 is disposed so as to be rotatable about the king pin 7 as an axis. Further, a return spring 75 is attached to the rotating member 71, and the upper connector main body 72 is urged to be automatically positioned behind the king pin 7 by the elastic force of the return spring 75. .

  According to the third embodiment, the upper connector main body 72 is urged so as to be rotatable about the kingpin 7 and automatically positioned behind the kingpin 7 by the return spring 75. In the connecting operation of the tractor a, as shown in FIG. 4A, even if the retracting direction of the tractor a is slightly deviated, the upper connector body 72 is guided by the king pin guide 61 of the coupler 6 and is required for connecting the connector. It rotates by a certain angle (see FIGS. 4B and 4C). Thus, even if the connection direction of the trailer b and the tractor a is slightly deviated, there is an advantage that the connection between the upper and lower connector bodies 7 and 6 does not hinder. Further, if the thrust bearing member 74 is interposed, it is particularly preferable to support a large load such as a trailer.

Furthermore, it is preferable to provide an electric motor 77a that can be expanded and contracted on the leg 77 provided on the lower surface of the vehicle body of the trailer b. In this way, the trailer leg 77 can be electrically expanded and contracted, so that it is easy to operate from the side of the tractor a at the time of connection, and advantages such as excellent operability can be obtained.
As described above, according to the present invention, the driver can complete the operation without leaving the driver's seat in the connection operation of the tractor and the trailer. Thus, a special effect that the work environment of trailer connection is greatly improved can be obtained.

(Fourth embodiment)
Next, 4th Embodiment regarding the separate connector for supplying the hydraulic pressure in this invention is described with reference to FIGS.
This hydraulic pressure supply connector has the following structure. That is, a valve built-in pipe joint (first joint) having a pivotable disc-like valve body 2 having a pivot shaft 21 driven from the outside at a pair of coupling ports 11a and 11b that are in contact with each other so as to be connected and disconnected. 1a, second joint 1b), and the disc-shaped valve body 2 is configured to be divided into two at right angles to the thickness direction. When the pipe joint is cut off, the disc-shaped valve body 2 is divided into two. One split valve body (for example, the first split valve body 2a) is arranged to close one connection port (for example, the connection port 11a), and the other split valve body (for example, the second split valve body 2b). ) Is arranged to close the other connecting port (for example, the connecting port 11b), and when the pipe joints (the first joint 1a and the second joint 1b) are connected, the divided valve bodies 2a and 2b are Forming an integrated disc-like valve body 2 and rotating and closing The connection ports 11a and 11b are opened so that the communication flow path 10 can be formed. The split valve bodies 2a and 2b are provided with valve body fixing pin members 4 for fixing the divided valve bodies 2a and 2b to the connection ports 11a and 11b. -A valve built-in pipe joint provided with a link mechanism that automatically opens and closes the valve body upon separation and a link mechanism that automatically operates the fixing pin is preferable.
The details will be described below.

(Basic structural principle)
First, the structural principle of this embodiment will be described with reference to FIGS. Here, one joint among the valve built-in pipe joints of the embodiment is a first joint 1a, and the other joint is a second joint 1b.
When the pair of first and second joints 1a and 1b that come into contact with each other are connected as shown in FIG. 1, the valve built-in pipe joint is driven from the outside at the close joint ports 11a and 11b. The pivotable disc-like valve body 2 having the pivoting shaft portion 21 and the driven shaft portion 22 is disposed in an open state, and the communication channel 10 is formed as a basic structure. .

  The disc-like valve body 2 is configured to be divided into two as a whole perpendicular to the thickness direction. When the pipe joint is cut as shown in FIG. 2, the disc-like valve body 2 is separated from the first split valve body 2a. The second divided valve body 2b is divided into two parts. In this case, the rotation shaft portion 21 and the driven shaft portion 22 are also the semi-columnar first divided rotation shaft portion 21a and the second divided rotation shaft portion 21b, and the first divided driven shaft portion 22a and the second divided portion. Divided into a driven shaft portion 22b.

  Then, when the first joint 1a and the second joint 1b are separated as shown in FIG. 2, the disc-like valve body 2 is rotated from the open state and is divided into one first divided valve body. 2a is arranged to close the connecting port 11a of the first joint 1a, and the other second divided valve body 2b is arranged so that the second joint 1b also closes the connecting port 11b. When the pipe joint is connected from this state, the divided valve bodies 2a and 2b are united, and are rotated about the same rotating shaft portion 21 and driven shaft portion 22 as shown in FIG. As shown, the closed connection ports 11a and 11b are opened to allow the communication channel 10 to be formed.

  Thus, in this valve built-in pipe joint, by using the split valve body in this way, the disc-like valve body 2 is rotated in the forward direction or the reverse direction in conjunction with the mechanical operation at the time of connecting / disconnecting the joint. If it is moved, the connection port can be closed and opened, and when disconnected, there is no oil remaining between the valve bodies as in the conventional joint, so there is an advantage that residual oil does not leak out. is there. In this case, an appropriate sealing member is interposed between movable parts such as the periphery of the shaft parts 21 and 22 and between the connection ports 11a and 11b and the opposed surfaces of the divided valve bodies 2a and 2b, and the contact and separation parts. It is preferable to hold.

(Seal structure of shaft part)
Next, the seal portion provided around the shaft portions 21 and 22 and between the coupling ports 11a and 11b will be described with reference to FIG. 3. The second divided rotation shaft portion 21b and the second divided rotation shaft portion 2b of the second divided valve body 2b will be described. Each of the divided driven shaft portions 22b is integrally formed with a rotating shaft seal portion 31b and a driven shaft seal portion 32b for fitting to the connecting port end portion on the pipe joint side, and as shown in FIG. Also on the first split valve body 2a side, a rotational shaft seal portion 31a and a driven shaft seal portion 32a are integrally formed symmetrically.

  And each shaft seal part 31a, 31b, 32a, 32b has a pair of flange parts 33a, 34a, the same flange parts 33b, 34b, the same flange part for sandwiching the connecting port end part on the pipe joint side from inside and outside. 35a, 36a and flange portions 35b, 36b are also provided. Accordingly, as shown in FIG. 5, each of the pivot shaft seal portions 31a and 31b and the driven shaft seal portions 32a and 32b is in contact with the first divided valve body 2a and the second divided valve body 2b. In addition, the shaft portions and the connection port end portions are sealed together.

  In addition, as shown in FIGS. 3 and 4, split pinion gears 23a and 23b are provided at the ends of the first and second split rotation shaft portions 21a and 21b, respectively. The divided pinion gears 23a and 23b will be described in detail later, but it goes without saying that when the first divided valve body 2a and the second divided valve body 2b are connected and brought into close contact, they function as an integrated circular pinion gear. There is nothing.

  Here, when supplementing about each shaft seal part 31a, 31b, 32a, 32b, the seal member which surrounds these each shaft part is comprised by the rubber | gum material softer than an outer peripheral part in the vicinity part of a shaft part. When the portions 31a, 31b and the driven shaft seal portions 32a, 32b are integrated and rotated, the seal member in the vicinity thereof rotates together with the shaft portion, but the outer peripheral portion is the connection port end of the pipe joint. It is fixed to the part. That is, the joint portion between the shaft portion and the seal member and between the seal member and the connection port end portion are mutually restrained, and the seal member is twisted around the shaft portion as a whole, There is no sliding part. Therefore, there is an advantage that the sealing action for preventing oil leakage between the members is further ensured.

(Seal structure between connecting ports)
As shown in FIG. 11 (B), the ring-shaped concave stripes 12a and the ring-shaped convex stripes 12b are provided along the circumference at the connecting port end portions of the first joint 1a and the second joint 1b facing each other. Sometimes it is fitted to form a substantially annular connecting port seal portion that exhibits a sealing action. This is to seal between the joints 1a and 1b in advance for a short time during which the valve body 2 rotates from the closed state to the open state, and when the valve body 2 is disconnected, the valve body 2 rotates from the open state to the closed state. This is because the gap between both joints 1a and 1b is sealed in advance only for a short time during which it moves. Thus, oil leakage at the time of connection / disconnection can be prevented.

(Seal structure between split valve bodies)
Similarly, as shown in FIG. 11 (B), in combination with the sealing structure between the connecting ports described above, ring-shaped recesses 25a are formed in the vicinity of the outer peripheral portions of the opposing surfaces of the first divided valve body 2a and the second divided valve body 2b. It is preferable that a ring-shaped protruding line 25b is provided, which is fitted between the ring-shaped ridges 25b so as to exhibit a sealing action when connected. This is to prevent oil from entering the gap between the divided valve bodies 2a and 2b even when the divided valve bodies 2a and 2b are slightly separated during connection and disconnection. Since the split valve bodies 2a and 2b are in close contact with each other when the valve is in an open state, there is very little intrusion of oil into the gap between the two, but the residual oil can be ignored by this inter-valve seal portion. Become.

(Fixed structure of split valve body)
In this valve built-in pipe joint, the connection ports 11a and 11b of the first and second pipe joints are closed by the divided valve bodies 2a and 2b, respectively, at the time of disconnection (see FIG. 11A), and at the time of connection, they are integrally rotated. Since the connection port is opened, the split valve bodies 2a and 2b need to be releasably fixed to the connection ports 11a and 11b by some means.

  For this reason, a fixed form as shown in FIG. That is, there are preferably four valve body fixing pin members 4 arranged on the outer peripheral wall in the vicinity of the connection ports 11a and 11b of the pipe joint, and these valve body fixing pin members 4 are as shown in FIG. In addition, a fixing pin 41 having a metal taper tip and an elastic packing 42 formed integrally therewith are fitted into a fixing hole 13 provided in an outer peripheral wall in the vicinity of the connection port in a sealed state. Is held in an extruding / retracting movable state.

Then, the valve body fixing pin member 4 is operated in such a manner that when the pipe joint is cut off, the fixing pin 41 is pushed inward and the pin holes 26 provided in advance in the outer peripheral portions of the divided valve bodies 2a and 2b (FIG. 12). And the movement of the split valve body is restricted to keep the connection port closed. Further, when connecting the pipe joints, the divided valve bodies 2a and 2b are integrated, and all of the fixing pins 41 are pulled outward to release the restraint so that they can be rotated as a whole.
The pushing / retracting operation of the fixing pin 41 may be an electric drive or a hydraulic drive, but a preferred mechanical drive system will be described below.

(Valve body automatic opening / closing link structure, valve body fixing pin member automatic operation link structure)
According to the mechanical drive system of the valve body and the fixing pin member of the present invention, the pinion gear 23 provided on the rotation shaft 21 (21a + 21b) of the valve body through the rack is mechanically operated when connecting and disconnecting the pipe joint. (23a + 23b), the valve body is rotated and driven to open and close, and at the same time, the fixing pin 41 of the valve body fixing pin member 4 is pushed and retracted by the mechanical operation to restrain and release the valve body. It is what you do. This will be specifically described below.

(Valve body automatic opening / closing link structure)
A link structure for opening / closing the valve body will be described with reference to FIGS.
On the side surface of the first joint 1a, there is provided a first guide frame portion 51b that is supported by a return spring 51a and guides the first advance / retreat rod 51 with the tip protruding so as to be able to advance and retract.
Further, a second guide frame portion 52b that guides the second advancing / retracting rod 52 held by the return spring 52a so as to advance and retreat is provided on the side surface of the second joint 1b. A bearing 52c linked to one arm of the lever type push link 6 is provided. A third guide frame portion 53b is provided in parallel with the second guide frame portion 52b to guide the third advance / retreat rod 53 held by the return spring 53a so as to be able to advance and retreat. Is provided with a bearing 53c linked to the other arm of the lever type push link 6, and a rack tooth 53d is formed at the tip thereof.

  These first, second, and third advance / retreat rods 51, 52, and 53 are arranged so as to be able to advance and retract in parallel to the axial direction of the joint. When the joint is connected, the first advance / retreat rod 51 and the second advance / retreat rod are arranged. The movement of the first advancing / retracting rod 51 is transmitted to the second advancing / retreating rod 52 and then transmitted to the third advancing / retreating rod 53 via the lever-type push link 55 so that the mutual positional relationship is established. The rack teeth 53d of the third advancing / retracting rod 53 are held so as to be engaged with the pinion gear 23b of the split rotation shaft of the valve body.

  Furthermore, in this valve built-in pipe joint, another set of link devices 54 similar to the link structure formed by combining the first, second, and third advance / retreat rods 51, 52, and 53 is provided at an axially symmetric position of the valve body. Is disposed. Thus, since the pinion gear 23 of the rotating shaft 21 is sandwiched between the two sets of link devices and operated in cooperation, there is an advantage that the rotating operation of the valve body as described below can be performed very smoothly.

  According to the link structure described above, during the connection, the forward movement of the first advancing / retracting rod 51 is performed in accordance with the operation of bringing the connection port closer to the connection state of FIG. 16 from the state of FIG. As described above, it is transmitted as an operation of advancing the rack teeth 53d of the third advancing / retracting rod 53 via the second advancing / retracting rod, and the meshing pinion gear 23b is moved to open the integrated valve body 2 (indicated by a chain line). It will be.

  At the time of disconnection, the advancing / retracting rods 51, 52, 53 are automatically returned from the connected state of FIG. 16 to the disconnected state of FIG. 15 by the restoring force of the return springs 51a, 52a, 53a provided respectively. The joints are cut off with the divided valve bodies 2a, 2b being in a closed state (state shown in FIG. 11; omitted in FIG. 15).

When connecting the valve body of the valve joint with a built-in valve, a series of operations such as releasing the restraint of the fixing pin (to be described in detail later), rotating and opening the valve body, and intimately joining the connection port are performed at intervals. It is necessary to proceed without placing. For this purpose, the setting of each timing is important, but it is particularly important to perform the rotation operation quickly.
For this purpose, in order to quickly rotate the pinion gears 23a, 23b, it is preferable to enlarge the operation of the first advance / retreat rod 51 and transmit it to the third advance / retreat rod 53. The arm length ratio (L2 / L1) of the link 55 is preferably set to 2 or more on the enlargement side.

(Fixed pin automatic operation link structure)
Next, with reference to FIGS. 14, 15, and 18, a link structure for pushing and retracting the fixing pin 41 will be described.
The first guide frame portion 51b and the second guide frame portion 52b are arranged at positions overlapping the valve body fixing pin member 4 provided on the side surfaces of the first and second joints 1a and 1b, so that the inner first The first advance / retreat rod 51 and the second advance / retreat rod 52 are formed with cam guide grooves 51d, 52d into which rollers 43, 43 provided on the upper portions of the fixing pins 41, 41 can be fitted. The cam guide grooves 51d and 52d allow the fixing pin 41 to be retracted as the advance / retreat rods 51 and 52 are pushed in the opposite direction, and push the fixing pin 41 as the advance / retreat rods 51 and 52 are pulled out. An inclined groove is provided.

Thus, by the mechanical operation of the first advance / retreat rod 51 and the second advance / retreat rod 52 at the time of connection / disconnection, the restraint releasing operation to the valve body and the restraining operation to the valve body are automatically performed by the fixing pin. .
In the above description, the combination of the first and second advance / retreat rods 51 and 52 is performed based on an example, but another set of link devices 54 and 54 provided symmetrically with respect to the rotation axis. Also, a fixed pin operation link structure having the same structure is provided.

  Further, for the two valve body fixing pin members on the driven shaft 22 side, the link structure of each advancement / retraction rod and cam guide described above may be used. In this case, the function of rotating the valve body is as follows. Since it is unnecessary, related members required for the rotating operation, for example, the lever type push link 55, the third advancing / retracting rod 53 related member, and the like are unnecessary.

  As described above, according to the mechanical link structure of the valve joint and the fixing pin member with a built-in valve joint, it is fixed by a mechanical operation such as a pressing operation for connecting the pipe joint and a pulling operation for separating. The valve body restraint release operation by the pin, the valve body turning operation from closing to opening, the turning operation from opening to closing, and the valve body restraining operation by the fixed pin are automatically performed, such as electricity, hydraulic pressure, etc. There is an advantage that no external operating power is required.

(Positioning structure when connected)
Furthermore, although it is preferable to have a positioning structure at the time of connection as described below, it is not always essential in the present invention.
As shown in FIG. 15, two guide rods 56a are provided on the outer periphery of the joints of the pipe joints 1a and 1b as positioning members for determining the joint positions of the pipe joints at symmetrical positions on one pipe joint side as shown in FIG. 56c, and guide grooves 56b, 56 into which the guide rods 56a, 56c can be inserted are provided on the other pipe joint side. Then, as shown in FIG. 16, the two guide rods 56a and 56c are inserted into the corresponding guide grooves 56b and 56, respectively, as shown in FIG. It is automatically connected to a predetermined positional relationship.

(Lock structure when connected)
Needless to say, in the pipe joint with a built-in valve, the pipe joints 1a and 1b need to be maintained in a pressure-bonded state so that the airtight state is maintained. Such a crimped state is realized, for example, by a push-up operation by an elevating device 62f provided in the lower connector main body 62 illustrated in FIG. 3B. However, in this valve built-in pipe joint, positioning is performed. It is also preferable to provide a known locking mechanism in the guide grooves 56b and 56c as well as the guide rods 56a and 56c which are members.

  When the small rods 57b and 57c are arranged together with the return spring at the distal end portion of the guide rod 56a, and the base end portion is linked to the eccentric floating piece 57a and the guide rod 56a is moved forward, the small portion is first small. When the rod 57c hits the bottom of the guide groove 56b and is pushed, the linked floating piece 57a jumps in the clockwise direction so that the tip engages with the recess 57d on the guide groove 56b side so that the guide rod 56a does not retract. Locked.

  To release this lock, when the guide rod 56a is slightly advanced, the small rod 57b protruding in place of the small rod 57c is pushed into the bottom of the guide groove 56b, and the linked floating piece 57a moves in the direction opposite to the clockwise hand. It jumps and the lock is released. As such a lock / release mechanism, what is generally known as a notch lock can be used.

  Thus, in this valve built-in pipe joint, by using such a mechanism, mechanical operation at the time of connection / disconnection, for example, an elevating device 62f provided in the lower connector main body 62 described above (see FIG. 3B). ) Can be automatically locked and unlocked for disconnection without using electrical or hydraulic means.

  If the above-described valve built-in pipe joint according to the fourth embodiment is applied as an individual connector for supplying hydraulic pressure, when connecting / disconnecting, the opening / closing operation of the connection port by the split valve body and the fixing / release of the connection port are performed. There is an advantage that this operation can be automatically operated by a link mechanism. Further, since it is difficult for oil to enter between the divided valve bodies during operation, a special advantage is obtained that leakage of residual oil can be prevented during opening and closing.

The principal part top view (A) and principal part side view (B) which show the component of this invention and a coupler. The principal part side surface sectional view (A) and principal part bottom view (B) which show the component of this invention, a kingpin, and its periphery. Top view of main part showing connector body (A), side view of main part (B) Simplified layout diagrams (A), (B), and (C) showing the positional relationship when the tractor and trailer are moved and connected. The principal part side view which shows the leg of a trailer. The side view (A) and top view (B) which illustrate a tractor. The side view which illustrates a trailer. The side view which shows the state which connected the tractor and the trailer. FIG. 3 is a partially cutaway perspective view showing a connected state of a valve built-in pipe joint. FIG. 3 is a partially cutaway perspective view showing a state where the valve joint with a valve is cut off. The partial notch perspective view (A) and principal part cc sectional drawing (B) which show the state of the connection port of the valve built-in pipe joint. The front view of the division valve body of a valve built-in pipe joint. The top view of the division | segmentation valve body which makes a pair of valve built-in pipe joints. The arrangement plan (A) of a valve body fixed pin member, and the section schematic diagram (B) showing the structure. The principal part upper surface schematic diagram of the joint in the separated state for demonstrating opening / closing operation | movement of a valve. The principal part upper surface schematic diagram of the joint in the connection state for demonstrating opening and closing operation of a valve. The arrangement schematic of the link member for explaining opening and closing operation of a valve. The arrangement schematic of the link member for explaining operation of a fixed pin. The arrangement | positioning schematic of the locking member for demonstrating the locking operation between joints.

Explanation of symbols

a: tractor, b: trailer 6: coupler, 61: king pin guide, 62: lower connector body, 62a, 62b, 62c: individual connector, 62e: focusing tube 7: king pin, 72: upper connector body, 72e: focusing section

Claims (7)

  In a trailer vehicle having a connecting device for connecting a trailer and a tractor by fitting a king pin projecting on the lower surface of the trailer to a coupler disposed on the upper surface of the tractor body, a gap portion between the king pin guides of the coupler The lower connector body is disposed below the king pin, and the upper connector body is disposed behind the king pin so as to be positioned immediately above the lower connector body when the king pin is fitted to the coupler. 1. A trailer vehicle characterized in that individual connectors for supplying at least one of electricity, hydraulic pressure, and pneumatic pressure are arranged on opposite surfaces of the main body and the upper connector main body so as to be mutually connectable.   The lower connector main body is suspended from the king pin guide of the coupler, and includes an elevating means, and the individual connector arranged can be pushed up and pulled down to be connected to and disconnected from each individual connector of the upper connector. Item 2. The trailer vehicle according to Item 1.   3. A plurality of positioning pins projecting from the opposing surface of one connector body of the lower or upper connector body, and a positioning recess for fitting the positioning pin is provided in the other connector body. Trailer vehicle described in.   A rotating member that can rotate about the kingpin as an axis is disposed on the lower surface of the trailer vehicle body, and the upper connector body is attached to the rotating member and arranged to be rotatable about the kingpin as an axis. The trailer vehicle according to any one of claims 1 to 3, wherein a return spring is attached to the upper connector body and the upper connector main body is urged so as to be automatically positioned behind the king pin.   The trailer vehicle according to claim 4, wherein the rotating member is rotatable by interposing a thrust bearing member on the trailer vehicle body.   The trailer vehicle according to any one of claims 1 to 4, wherein an electric motor capable of extending and contracting is provided on a leg provided on a lower surface of the vehicle body of the trailer. The individual connector for supplying hydraulic pressure is a valve built-in pipe joint provided with a rotatable disc-shaped valve body having a rotation shaft portion driven from the outside at a pair of connection ports which are in contact with each other so as to be connected and disconnected. The disc-shaped valve body is configured to be divided into two at right angles to the thickness direction. When the pipe joint is cut off, the disc-shaped valve body is divided into two, and one divided valve body is connected to one of the connecting valve bodies. The other divided valve body is arranged to close the other connecting port, and when this pipe joint is connected, each divided valve body is rotated together and closed. A link that automatically opens and closes the valve body when it is connected / disconnected is provided with a fixing pin means that fixes this divided valve body to each connection port. Mechanism and link mechanism for automatically operating the fixing pin Trailer vehicle according to claim 1 is obtained by including a.

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