JPH09240518A - Coupler device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent function parts extending from a coupler base from being damaged by arranging all function parts such as an operation member and the like inside the coupler base so as not to be projected from periphery of the coupler base. SOLUTION: A yoke lever 22 moves a yoke 12 to a fixed position for fixing a jaw 3 to a holding position when an actuation rod 26 is moved to a turnout position by air actuation of a yoke cylinder 25. When the actuation rod 26 is moved to an extension position, the yoke lever 22 moves the yoke 12 to an opening position for opening the jaw 3 powerfully. At this time, all of the actuation members such as a tip of the yoke lever 22, a tip of the actuation rod 26 and the like are arranged such that they are projected to the periphery of the coupler base 1. Thereby, when a truck having mounted the coupler device is driven rearward to couple it with a trailer which has a king pin, the function parts are not damaged even if the king pin at the trailer side abuts the periphery of the coupler base 1 due to driving mistake and the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coupler base having a pair of jaws for holding and releasing a kingpin provided on a vehicle to be towed, and an operating member for operating a fixing member for fixing the jaws at the holding position. The present invention relates to a coupler device having the same.

[0002]

2. Description of the Related Art In a conventional coupler device of this type,
It is common to manually operate the operating members that operate the fixing members such as the yoke that fixes the jaws in the clamping position.
Moreover, since a considerable force is required for the operation, the operation member and the like are provided so as to project from the coupler base to the outside.

Further, a conventional coupler device for driving an operating member or the like for operating a fixing member such as a yoke for fixing the jaw at the clamping position and the open position by an air cylinder is disclosed in Japanese Patent Laid-Open Nos. 53-22214 and 53-22214. No. 53-119515,
JP-A-58-22773, JP-A-58-2277
4, JP-A-58-95772 or JP-A-6
As described in Japanese Patent Application Laid-Open No. 3-103778, an operating member such as a lock cam plate or the like for restricting the position of the fixing member between the holding position and the open position, a handle such as a yoke lever, or an operating member such as the air cylinder itself is a coupler base. It was provided so as to project from the surrounding area to the outside.

[0004]

Therefore, when the tractor provided with the coupler device is moved backward and is connected to the trailer having the kingpin, if the height of the tractor is unsuccessful, the kingpin on the trailer side causes the coupler base. There was a fear that the functional parts protruding from the vehicle would be damaged, and that the functional parts protruding from the coupler base during parking could be opened by mischief or an erroneous operation and the tractor and trailer could be separated.

[0005]

SUMMARY OF THE INVENTION Therefore, the present invention comprises a pair of jaws for holding and releasing a kingpin provided on a vehicle to be towed, and an operating member for operating a fixing member for fixing the jaw at the holding position. In a coupler device having a coupler base, all the functional parts such as the operation member are arranged inside the coupler base so as not to project from the periphery of the coupler base. . In the coupler device of the present invention, the fixing member includes a yoke, an operating member including a yoke lever that moves the yoke along the yoke shaft, and a lock cam plate that restricts the position of the yoke between a holding position and an opening position. An object of the present invention is to provide a coupler device characterized by including the above. Further, the present invention is to provide a coupler device in which the air cylinder for automatically operating the operating member and the like is provided in the coupler device. In addition, the present invention is to provide a coupler device in which the detachable manual operating member for manually operating the operating member is provided in the coupler device.

Further, according to the present invention, in the above-described coupler device, a lock guard limit switch for confirming that the jaw is in a position for holding the kingpin, and a yoke limit switch for confirming that a fixing member such as a yoke is in a fixed position. , And a coupler limit switch for confirming that the coupler base is in an appropriate coupling position is provided on the coupler base side, and the coupler device is configured to confirm the coupling state with the kingpin. To do.

[0007]

According to the coupler device of the present invention having the above structure, a pair of jaws for holding and releasing a kingpin provided on a vehicle to be towed are provided, and an operating member for operating a fixing member for fixing the jaw at the holding position. In a coupler device having a coupler base provided with, by arranging all the functional parts such as the operation member inside the coupler base so as not to project from the periphery of the coupler base, the tractor provided with the coupler device is moved backward. , When connecting to a trailer equipped with a king pin, even if the king pin on the trailer side may come into contact with the periphery of the coupler base due to an operational error or a height of the tractor, the air cylinder, yoke lever, etc. Since the functional parts are not overhanging, there will be no accident such as damage. In addition, since there is no functional part protruding from the coupler base during parking, the tractor and trailer are not separated by mischief or erroneous operation.

Further, in the above-mentioned coupler device, the fixing member is composed of a yoke, the operation member is composed of a yoke lever for moving the yoke along the yoke shaft, and a lock cam plate for restricting the position of the yoke between the clamping position and the opening position. According to the coupler device provided with, the position of the yoke can be restricted to the clamping position and the opening position by the lock cam plate, and by doing so, the position of the jaw can be restricted to the clamping position and the opening position, and the yoke lever can be controlled. The yoke can be moved along the yoke shaft to the holding position or the opening position. Further, in the above-mentioned coupler device, by providing an air cylinder for automatically operating the operation member and the like, for example, by driving the yoke lever and the lock cam plate by the air cylinder, the labor by the manual operation becomes unnecessary, and the tractor is eliminated. It is possible to automatically move and fix the yoke to the holding position or the opening position from a remote place such as a driver's seat.

Further, according to the present invention, in the above-mentioned coupler device, by providing a detachable manual operating member for manually operating the operating member and the like, the coupler device is arranged inside the coupler base so as not to project from the periphery of the coupler base. A manual operation member can be attached to an operation member such as a yoke lever or a lock cam plate for manual operation, and after operation, it can be detached so as not to project from the periphery of the coupler base. The present invention also provides, in the above coupler device, a lock guard limit switch for confirming that the jaw is in a position for holding the kingpin, a yoke limit switch and a coupler base for confirming that a fixing member such as a yoke is in a fixed position. Is installed in the coupler base side to confirm that the coupler is in the proper connection position, and the coupler device is used to confirm the connection state with the king pin. It is possible to check whether or not the fixing members such as etc. are in the fixed position, and whether the coupler base is in the proper connecting position, so that preparation for connection, completion of connection, traveling during connection, preparation for disconnection, or completion of disconnection, etc. Depending on the case, appropriate information can be obtained based on the ON / OFF signals of each of the above limit switches. And thus capable of performing the operation corresponding to the distribution reliably.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown below. 1 is a coupler base, as shown in FIG.
A support leg 2 fixed to the tractor R side is rotatably supported by a bearing 4. At the center of the coupler base 1, a pair of jaws 3 is provided which opens and closes around a pair of jaw pins 5. The jaw 3 is provided with a semi-arcuate holding portion 6 for holding the kingpin K on the trailer T side shown in FIG. 7 in the center, and also has a guide surface 7 in the entrance direction of the kingpin K.
Is provided. As shown in FIG. 4, a wall surface abutting portion 9 facing the separation prevention wall 8 in case of an emergency provided on the coupler base 1 is integrally provided in the distal end direction of the guide surface 7, and the jaw pin 5 may be moved by some reason. When the breakage occurs, the wall surface abutting portion 9 abuts the separation preventing wall 8 while the jaw 3 holds the kingpin K, so that the kingpin K is held. Further, an open jaw spring 11 is provided between the protrusions 10 of the jaw 3 on the opposite side of the sandwiching portion 6 with the jaw pin 5 as a fulcrum so as to impart a tensile elastic force, and the jaw 3 is imparted with a spring elastic force in a direction of always opening. are doing.

Reference numeral 12 denotes a bifurcated yoke which constitutes a fixing member for fixing the jaw 3 to the holding position. The bifurcated yoke tip portion 1 is moved by advancing in the kingpin K direction.
The inner side wall 4 of the jaw 3 abuts on the tip clamping surface 13 of the jaw 3, and the outer side wall abuts the clamping wall 15 of the coupler base 1 to fix the jaw 3 in the clamping position and to perform the retracting operation. By doing so, the yoke tip portion 14 is separated from the tip pressing surface 13 of the jaw 3 and the pressing wall portion 15 of the coupler base 1, and the jaw 3 is opened by the opening jaw spring 11. At this time, as shown in FIG. 6, the locking projection 16 of the bifurcated yoke tip portion 14 engages with the engagement groove 17 on the back side of the jaw 3 to set the jaw 3 in the open position and at the same time. Even if the yoke 12 is moved in the kingpin K direction, the locking projection 16 is engaged with the engagement groove 17 on the back side of the jaw 3 to prevent the jaw 3 from moving in the holding direction. is there. Then, when the kingpin K enters the holding portion 6 of the jaw 3 and rotates the jaw 3 in the closing direction, the locking protrusion 16 causes the jaw 3 to move.
It is configured so as to be disengaged from the engagement groove 17 on the back side of the and to allow the yoke tip portion 14 to move the jaw 3 in the clamping direction. At the center of the base of the yoke 12, a yoke shaft 20 having both ends integrally fixed to the rear wall surface 18 of the coupler base 1 and the central support portion 19 is provided. The center of the base of the yoke 12 is movably guided by the yoke shaft 20, and a yoke spring 21 wound around the outer periphery of the yoke shaft 20 is provided between the rear wall surface 18 and the yoke 12 so as to provide an elastic force. Therefore, the yoke 12 is provided with a spring elastic force in a direction of moving the jaw 3 in a direction to clamp the jaw 3 and fixing the jaw 3 in the clamped state to the clamping position.

On the other hand, at the center of the base of the yoke 12, a yoke lever 22 for moving the yoke 12 against a spring elasticity of the yoke spring 21 to a fixed position for fixing the jaw 3 at the clamping position and an open position is provided on the yoke shaft. It is provided to cross 20. One end of the yoke lever 22 is provided at one end of the coupler base 1 with the support shaft 23 as a center.
It is swingably supported along the longitudinal direction of 0. In the case of the embodiment, a lever guide member 24 is integrally provided at the center of the base of the yoke 12 below the yoke shaft 20 in FIG. 2, and the yoke lever 22 swings on the lever guide member 24. The yoke 12 is freely engaged, and the yoke 12 can be freely moved along the yoke shaft 20 as the yoke lever 22 swings. On the other end side of the yoke shaft 22, a yoke cylinder 25 in which the operating rod 26 is air-operated in a direction substantially parallel to the yoke shaft 20 is provided on the coupler base 1 alongside the jaw 3.
Is oscillated around a fulcrum. Reference numeral 28 is a mounting member that attaches the actuating rod 26 to the other end side of the yoke shaft 22 in a stretchable manner. When the operating rod 26 is moved to the retracted position by the air operation of the yoke cylinder 25, the yoke lever 22 moves the yoke 12 via the lever guide member 24.
To the fixed position where the jaw 3 is fixed to the clamping position,
When the operating rod 26 moves to the extended position, the yoke lever 2
2 is configured to move the yoke 12 through the lever guide member 24 to an open position that strongly opens the jaw 3 against the spring elasticity of the yoke spring 21, and at this time, the tip of the yoke lever 22 is moved. All the operating members such as the tip of the operating rod 26 are provided so as not to project around the coupler base 1. Reference numeral 29 is a connecting portion of the manual operating member, which is composed of a connecting mechanism or the like for connecting the manual operating member provided at the tip of the yoke lever 22.

Also, on the side of the yoke 12, it is located in the middle of the yoke shaft 20 and the yoke cylinder 25.
Moreover, a lock pin 30 is integrally provided with the yoke 12 so as to project from the yoke lever 22 and the yoke base portion via a square connecting portion. 31 is a lock cam plate,
In the figure, it is located below the yoke 12 and the yoke lever 22, and is provided on the rear wall surface 18 of the coupler base 1 so as to be swingable about the support shaft 32 along the longitudinal direction of the yoke lever 22. The lock cam plate 31 includes the lock pin 3
A cam hole 33 into which 0 is fitted is provided. In the cam hole 33, as shown in FIG. 4, the yoke fixing step portion 3 that locks the yoke 12 in the fixing position so that the jaw 3 maintains the holding position.
4, a yoke disconnection step portion 35 for disconnecting the jaw 3 and maintaining the ready state as shown in FIG. 5, and a jaw opening hole portion for restricting the position of the yoke 12 for maintaining the jaw 3 in the open state as shown in FIG. 36 etc. are provided.

A safety lock cylinder 40 is provided between the base side of the lock cam plate 31 and the rear wall surface 18 of the coupler base 1 so that the operating rod 37 is operated by air. Reference numeral 38 denotes a lock cam plate 3 at the base of the safety lock cylinder 40 on the rear wall surface 18 of the coupler base 1.
Reference numeral 39 is a support shaft that is swingably connected in one direction, and 39 is a mounting member that mounts the operating rod 37 to the lock cam plate 31. When the safety lock cylinder 40 is actuated by air, the actuating rod 37 moves to the retracted position and the lock pin 3
When 0 is engaged with the yoke fixing step portion 34, the yoke lever 22 and the yoke 12 are fixed to the fixing position for fixing the jaw 3 to the holding position as shown in FIG. 4, and as shown in FIG. When the operating rod 37 extends and moves to the yoke separating step 35, the yoke lever 22 and the yoke 1
2 is fixed to the opening preparation position where the jaw 3 is strongly opened against the spring elasticity of the yoke spring 21, and the operating rod 37 is provided with a jaw opening hole 36 as shown in FIG.
When moving to, the position of the yoke 12 that keeps the jaw 3 in the open state is restricted. 41 designates the lock cam plate 31 for actuating rod 3 of the safety lock cylinder 40.
7 is a lock plate spring that gives a spring elastic force that rotates in the retracting direction of 7, and a manual operation member 42 that is a wire or the like for manually operating the lock cam plate 31 against the spring elasticity of the lock plate spring 41 is attached or detached. It is a connecting portion composed of protrusions or the like that can be freely connected.

Reference numeral 43 is a lock guard limit switch for confirming that the jaw 3 is in a position for holding the kingpin K. The lock guard limit switch 43 is provided at the front end portion of the introduction path of the kingpin K of the coupler base 1 with the support shaft 4
4 is provided at a position where it abuts on an operating end 46 of a detection lever 45 which is swingably provided at 4. As shown in FIG. 2, the detection portion of the detection lever 45 extends below the holding portion 6 of the jaw 3 along the introduction path of the kingpin K, and abuts against the holding portion 6 at the holding position and is pushed down. The operating end 46 moves upward about the support shaft 44 to move the lock guard limit switch 4
3 is configured to be closed (ON). Reference numeral 47 denotes a detection lever spring that elastically pushes the detection portion of the detection lever 45 upward, and the tip of the detection lever 45 in the direction of the detection portion is always stopped by using an appropriate structural member of the coupler base 1 as a stopper. Reference numeral 48 is a yoke limit switch for confirming that the yoke 12 is in the fixed position.
In the vicinity of the central support portion 19 of 0, the yoke 12 is provided so as to come into contact with the base portion of the yoke 12 or a portion integrated with the base portion to be closed (ON) at a position where the yoke 3 is fixed at the sandwiching position.

Reference numeral 49 is a stopper limit switch for confirming that the coupler base 1 is in a proper horizontal connecting position. The stopper limit switch 49 is shown in FIG.
As shown schematically in FIG. 13, the coupler base 1, which is normally subjected to the spring resilience so that the connecting tip direction is lowered in the trailer T direction with respect to the support leg 2, is located around the kingpin K of the trailer T during connection. Utilizing the fact that it is brought into contact with the bottom of the base to change its posture in the horizontal direction, its operating terminal portion is rotated by spring elasticity or the like to the coupler base 1 which is inclined and is close to the projecting portion 51 of the supporting leg portion 2. The coupler base 1 is installed so as to abut with the trailer T.
When contacting the bottom of the king pin K and changing its posture in the horizontal direction, the operating terminal 50 rotates and the stopper limit switch 49 is closed (0N).

The above lock guard limit switch 4
3, the yoke limit switch 48 and the stopper limit switch 49, as described in the explanatory diagram of FIG.
A starter switch 52, a parking brake switch 53, and a reverse switch 54 on the tractor driver's seat are provided via relay switch circuit parts such as relay switches R1, R2, R3, R4, R5, R6 of the control box S provided on the tractor near the connecting portion. , A pilot lamp 55 for confirming proper connection, and an alarm circuit including an alarm lamp 56, a buzzer 57, and the like. Reference numerals 58 and 59 denote a warning lamp and a buzzer for the warning circuit provided in the control box S, and 60 denotes a power source such as a battery provided in the tractor. In addition, the yoke cylinder 2
5 and the safety lock cylinder 40 respectively include the solenoid valve 6 in the control box S from the air tank 63 of the tractor.
The working air is supplied via 1, 62. Reference numeral 64 is a yoke key switch of the solenoid valve 61 for operating the yoke cylinder 25, and 65 is a lever key of the solenoid valve 62 for operating the safety lock cylinder 40. In the case of the embodiment, the solenoid valve 6
When the air cylinders 1 and 62 are operated and the air in the air tank 63 is supplied to the air cylinders 25 and 40, the operating rods 26 and 37 are operated.
When the air in the air tank 63 in which the solenoid valve is not operating is not supplied, the air in each of the air cylinders 25 and 40 is sucked from another air circuit and the operating rods 26, 3
7 is urged in the direction of contraction. The operation mode of each switch described above is as shown in Table 1 corresponding to the operation of each unit from coupling to disconnection of the coupler device.

[0018]

[Table 1]

The operating mode of the coupler coupling device according to the present invention will be described with reference to Table 1. First, in the preparatory stage, it is confirmed that the jaw 3 is open and the height of the trailer T is appropriate. . At this time, as shown in FIG.
The operating rod 26 of the yoke cylinder 25 extends, the yoke 12 is in the jaw open position along with the yoke lever 22, and the lock pin 30 of the yoke base is located in the jaw open hole 36 of the lock cam plate 31. The jaw 3 is opened, and the yoke 1 receives the spring elasticity of the yoke spring 21.
The engaging projection 16 of the tip portion 14 of the second No. 2 is the engaging groove 17 of the jaw 3.
To maintain the jaw 3 in an open state.

Next, as shown in FIG. 7, the tractor is retracted to start the connecting operation. At this time, as shown in FIGS. 10 and 14,
The starter switch 52 and the reverse switch 54 associated with the operation of the back gear lever are turned on, and the relay switches R1, R2, R3, R4 are turned on. Do not energize the alarm circuit. 'If you retract the tractor while Jaw 3 is closed, the alarm lamps and buzzers in the driver's seat and control box will sound, and you will know the abnormality. At this time, as shown in FIG. 16, since the starter switch 52 and the reverse switch 54 are turned on and the jaw 3 is at the holding position, the lock guard limit switch 43 and the yoke limit switch 48 are turned on.
In the N state, relay switches R1, R2 and R3 are ON
Then, the alarm circuit is energized, the alarm lamps 56 and 58 on the driver's seat and the control box are turned on, and the buzzers 57 and 59 are sounded.

When the tractor R and the trailer T are connected in a normal state as shown in FIG. 8, the pilot lamp 55 on the driver's seat is turned on with the reverse gear set. Do not energize the alarm circuit. At this time, as shown in FIG. 8, when the kingpin K enters the pinching portion 6 of the jaw 3 and the jaw 3 moves in the closing direction, as shown in FIG. 4, the tip end portion 14 of the yoke 12 which receives the spring elasticity of the yoke spring 21. Locking protrusion 1
6 is disengaged from the engaging groove 17 of the jaw 3 and maintains the jaw 3 in a clamped state. At the same time, the yoke cylinder 25 is also contracted via the yoke lever 22 which receives the spring elasticity of the yoke spring 21. When an air actuation in the contracting direction acts on the yoke cylinder 25, an air force in the fixing direction acts on the yoke 12 via the yoke lever 22. The lock pin 30 of the yoke base moves in the cam hole 33 and engages with the yoke fixing stepped portion 34 of the lock cam plate 31 which is rotated by the spring elasticity of the lock plate spring 41, and the jaw 3 is fixed at the fixed position. At this time, as shown in FIGS. 11 and 15, since the jaw 3 is in the connecting position with the king pin sandwiched, the lock guard limit switch 43, the yoke limit switch 48, and the stopper limit switch 49.
Is ON, the starter switch 52 and the reverse switch 54 are ON, and the relay switches R1, R
3, R5 and R6 are turned on, and the circuit of the pilot lamp 55 in the driver's seat is energized and lights with the reverse gear being put in.

Next, the brake of the tractor and the trailer, the hose and harness of the electric system are connected, the auxiliary leg of the trailer is lifted, the parking brake of the trailer is released, and the vehicle runs. 'If there is a connection failure due to trailer height incompatibility, etc., the alarm device will activate and the pilot lamp will go out in the above-mentioned state. In this case, since the stopper limit switch 49 is maintained in the OFF state in the normal state of FIG. 15, the state is exactly the same as that of FIG. 16 ', the alarm device is activated, and the pilot lamp is turned off. .

When the vehicle is normally running in the connected state, the reverse switch is turned off in the state of, so the relay switch R3 is turned off in FIGS. 11 and 15.
The pilot lamp 55 goes out. 'If the kingpin K is disengaged from the jaw 3 during connected travel and a connection failure occurs, the alarm circuit is energized and the alarm lamps 56 and 58 on the driver's seat and the control box are turned on and the buzzers 57 and 5 are output.
9 sounds. In this case, as shown in FIG.
When the king pin K is removed from the lock guard limit switch 43 and the yoke limit switch 48.
Is turned off and the relay switches R1, R4, R5 are turned on, the alarm circuit is energized, the alarm lamps 56, 58 for the driver's seat and the control box are turned on, and the buzzers 57, 59 are sounded. When the vehicle is stopped and the parking brake is applied at "", the alarm device stops operating. In this case, in FIG.
When the parking brake switch 53 is turned on, the relay switch R1 which constitutes the alarm circuit is turned off,
The alarm is shut off.

In preparation for connection and disconnection, the parking brake of the trailer is applied, the auxiliary legs of the trailer are lowered, and the brakes of the tractor and trailer and the hoses and harnesses of the electric system are disconnected. Is exactly the same as the state. The lever key and the yoke key are operated in this order, and the safety lock cylinder 40 and the yoke cylinder 25 are operated in this order to release the connection. In this case, as shown in FIG. 12, when the lever key provided in the control box S is operated, the lever key switch 65 is turned on, the solenoid valve 62 is operated, and as shown in FIG. The safety lock cylinder 40 extends and rotates the lock cam plate 31 against the lock plate spring 41 to move the lock pin 30 of the yoke 12 to the yoke fixing step portion 34.
When the yoke key is operated and the yoke key is subsequently operated, the yoke key switch 64 is turned on, the solenoid valve 61 is operated, the yoke cylinder 25 is extended, and the lock pin 30 is released via the yoke lever 22, as shown in FIG. Yoke fixed step 34
The yoke 12 separated from is moved to the fixed release position against the elastic force of the yoke spring 21. At this time, FIG.
As shown in, the kingpin K is in the clamping position of the jaw 3, so that the lock guard limit switch 43 maintains the ON state. In this state, as shown in FIGS. 12 and 18, the yoke key switch 64 and the lever key switch 65 in the control box S are turned on, and the yoke limit switch among the switches 43, 48, 49 of the coupler base 1 is turned on. Only the switch 48 turns off and the starter switch 52
Also, the parking brake switch 53 is turned on, and the relay switches R4, R5, R6 are turned on. At this time, if the parking brake switch 53 is in the OFF state, the relay switch R1 is turned ON and the alarm circuit is activated immediately.

As shown in FIG. 9, the tractor is advanced and separated from the trailer. At this time, as in the case shown in FIG. 13, the lever key and the yoke key are released and the lever key switch 65 and the yoke key switch 64 are released.
Is in the OFF state, the lock guard limit switch 43, the yoke limit switch 48 and the stopper limit switch 49 of the coupler base 1 are in the OFF state, and the only difference from FIG. 13 is that the reverse switch 54 is also in the OFF state.

When the air cylinder operating system by the lever key and the yoke key has failed, the lock cam plate 31 and the yoke lever 22 can be manually operated by the manual operation member to release the connection. As shown in FIG. 19, in the state in which the king pin is clamped and fixed in FIG. 4, the clamp wire 66 is attached to the connecting portion 42 of the manually operated member including the connecting protrusion of the lock cam plate 31, and the screw connecting portion of the yoke lever 22 and the like. The bar handle 67 is attached to the connecting portion 29 of the manual operating member, the clamp wire 66 is pulled, and the lock cam plate 31 is rotated toward the front against the spring elasticity of the lock plate spring 41, as shown in FIG. When the lock pin 30 of the yoke 12 is disengaged from the yoke fixing step portion 34, and then the yoke lever 22 is rotated clockwise by the bar handle 67 in the figure, the base of the yoke 12 is moved through the lever guide member 24. Against the spring elasticity of the yoke shaft 20
By moving the coupler base 1 toward the rear wall surface 18 of the coupler base 1, the tip portion 14 of the yoke 12 is moved to the jaw open position. At this time, the lock pin 30 integrated with the yoke 12 is guided to the jaw opening hole portion 36 of the cam hole 33 of the lock cam plate 31. After operating the yoke 12 to the open position of the jaw 3, the clamp wire 66 and the bar handle 67 can be removed.

At this time, as shown in FIG. 19, among the switches 43, 48, 49 of the coupler base 1, only the yoke limit switch 48 is turned off and the starter switch 52 and the parking brake switch 53 are turned on.
However, the relay switches R4, R5 and R6 are in the ON state. At this time, if the parking brake switch 53 is in the OFF state, the relay switch R1 is turned ON and the alarm circuit is activated immediately. The electric circuit for manual operation shown in FIG. 19 is, as will be apparent from comparison with FIG. 18, electromagnetic valves 61 and 62 by lever key switch 65 and yoke key switch 64 of FIG. 18, safety lock cylinder 40, and yoke. Since the other electric circuit configuration is the same except that the air cylinder operating system of the cylinder 25 is deleted, even if the coupler device according to the present invention has only the manual operation without the air cylinder operating system, It is obvious that all the operations except the above are performed.

[0028]

As described above, according to the coupler device of the present invention, the operating member is provided with a pair of jaws for sandwiching and opening the kingpin provided on the vehicle to be towed, and for operating the fixing member for fixing the jaws at the sandwiching position. In a coupler device having a coupler base provided with, etc., a tractor provided with a coupler device is provided by having a configuration in which all parts such as the operating member are arranged inside the coupler base so as not to project from the periphery of the coupler base. When the trailer-side kingpin may come into contact with the periphery of the coupler base due to the height of the tractor when it is moved backward and connected to the trailer equipped with the kingpin, the air cylinder, yoke lever, etc. Since functional parts etc. do not project around,
This has the effect of preventing an accident in which functional parts are damaged and cannot be connected. Further, since there is no functional component protruding from the coupler base during parking, it is possible to prevent the fear of accident such as disconnecting the tractor and the trailer due to mischief or erroneous operation.

Further, according to the present invention, in the above-mentioned coupler device, the fixing member is composed of a yoke, and is composed of a yoke lever for moving the yoke along the yoke shaft, and a lock cam plate for restricting the position of the yoke between the clamping position and the opening position. By having the configuration in which the operating member and the like are provided, the position of the yoke can be regulated to the sandwiching position and the open position by the lock cam plate, and by doing so, the jaw can be safely regulated to the sandwiching position and the open position. On the other hand, there is an effect that the yoke lever can easily move the yoke along the yoke shaft to the holding position or the open position. Further, in the above coupler device, by providing an air cylinder for automatically operating the operating member, for example, by driving and operating the yoke lever and the lock cam plate with the air cylinder,
There is an effect that the yoke can be moved and fixed to the holding position or the opening position automatically and remotely from a tractor driver's seat or the like.

Further, according to the present invention, in the above-mentioned coupler device, by providing a detachable manual operating member for manually operating the operating member, the inside of the coupler base is prevented from protruding from the periphery of the coupler base. A manual operating member can be attached to the operating members such as the yoke lever and lock cam plate, which can be operated manually, and must be detached so as not to project from the periphery of the coupler base after opening and closing the jaw. Therefore, even if the king pin on the trailer side may come into contact with the periphery of the coupler base during connection, the functional components such as the air cylinder and yoke lever do not project to the surroundings, and the functional components are damaged. In addition to the effect of preventing accidents that could prevent connection, the functional parts protruding from the coupler base during parking can be eliminated. From the effect of fear can also prevent accidents that would disconnect the tractor and the trailer by mischief or erroneous operation.

Further, according to the present invention, in the above coupler device, a lock guard limit switch for confirming that the jaw is in a position for holding the king pin, and a yoke limit switch for confirming that a fixing member such as a yoke is in a fixed position. In addition, a stopper limit switch that confirms that the coupler base is in the proper connection position is provided on the coupler base side, and a structure that confirms the connection state with the king pin by the coupler device is used to check whether the jaw pinches the king pin. It is possible to confirm whether or not the fixing member such as the yoke is in the fixed position, and whether the coupler base is in the proper connecting position.Therefore, connection preparation, connection completion, connection traveling, disconnection preparation, or Appropriate information based on ON / OFF signals of each of the above limit switches depending on the completion of disconnection, etc. The resulting, there is an effect that can be reliably each operation corresponding to the information.

[Brief description of drawings]

FIG. 1 is a bottom view showing a main part of an embodiment of a coupler device according to the present invention.

[Fig. 2] Front view of the central longitudinal section

[Fig. 3] Side view of the central longitudinal section

FIG. 4 is a bottom view of the main part showing the usage mode.

FIG. 5 is a bottom view of a main part showing another usage mode.

FIG. 6 is a bottom view of a main part showing another usage mode.

FIG. 7 is a central vertical sectional front view showing a usage state thereof.

FIG. 8 is a central vertical sectional front view showing another usage mode.

FIG. 9 is a central longitudinal front view showing another usage mode.

FIG. 10 is a schematic explanatory view showing an operation mode.

FIG. 11 is a schematic explanatory view showing an operation mode.

FIG. 12 is a schematic explanatory view showing an operation mode.

FIG. 13 is a schematic explanatory view showing an operation mode.

FIG. 14 is a schematic explanatory view showing an operation mode.

FIG. 15 is a schematic explanatory view showing an operation mode.

FIG. 16 is a schematic explanatory view showing an operation mode.

FIG. 17 is a schematic explanatory view showing an operation mode.

FIG. 18 is a schematic explanatory view showing an operation mode.

FIG. 19 is a schematic explanatory view showing an operation mode.

[Explanation of symbols]

1 Coupler Base 2 Support Leg 3 Jaw 4 Bearing 5 Jaw Pin 6 Clamping Part 7 Guide Surface 8 Separation Prevention Wall 9 Wall Abutment 10 Protrusion 11 Open Jaw Spring 12 Yoke 13 Tip Clamping Surface 14 Yoke Tip 15 Clamping Wall 16 Locking protrusion 17 Engagement groove 18 Rear wall surface 19 Central part support portion 20 Yoke shaft 21 Yoke spring 22 Yoke lever 23 Support shaft 24 Lever guide member 25 Yoke cylinder 26 Actuating rod 27 Support shaft 28 Mounting member 29 Manual operation member connecting part 30 lock pin 31 lock cam plate 32 support shaft 33 cam hole 34 yoke fixing step 35 yoke separating step 36 jaw opening hole 37 actuating rod 38 support shaft 39 mounting member 40 safety lock cylinder 41 lock plate spring 42 manual operation member Connection part 43 Lock guard limit Switch 44 support shaft 45 detection lever 46 actuation end 47 detection lever spring 48 yoke limit switch 49 stopper limit switch 50 actuation terminal portion 51 protrusion 52 starter switch 53 parking brake switch 54 reverse switch 55 pilot lamp 56 warning lamp 57 alarm buzzer 58 Alarm lamp 59 Alarm buzzer 60 Power supply 61 Solenoid valve 62 Solenoid valve 63 Air tank 64 Yoke key switch 65 Lever key switch 66 Clamp wire 67 Bar handle R Tractor T Trailer K King pin S Control box R1, R2, R3, R4, R5 , R6 relay switch

Claims (5)

[Claims] 1. A coupler base provided with a pair of jaws for holding and releasing a kingpin provided on a vehicle to be towed, and an operation member for operating a fixing member for fixing the jaws at the holding position between the holding position and the opening position. In the coupler device having the above, all the functional parts such as the operation member are arranged inside the coupler base so as not to project from the periphery of the coupler base. 2. The coupler device according to claim 1, wherein the fixing member includes a yoke, a yoke lever that moves the yoke along the yoke shaft, and a lock cam plate that restricts the position of the yoke between a holding position and an opening position. A coupler device, comprising: 3. The coupler device according to claim 1, further comprising an air cylinder for automatically operating an operating member and the like. 4. The coupler device according to claim 1, 2 or 3, wherein a detachable manual operating member for manually operating the operating member or the like is provided. 5. The coupler device according to claim 1, 2, 3 or 4, wherein lock members such as a lock guard limit switch and a yoke for confirming that the jaw is in a position to clamp the king pin are in fixed positions. The coupler is characterized in that a yoke limit switch for confirming that the coupler base and a stopper limit switch for confirming that the coupler base is in the proper coupling position are provided on the coupler base side, and the coupling state with the king pin by the coupler device can be confirmed. apparatus.