JPH0562395U - Coupler operating device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve workability and safety by enabling locking and unlocking of the trailer king pin for the coupler from the cab. A sliding member 6 is installed on a guide rail 5 that contacts the coupler body 2, one end of a lever 10 pivotally supported by the sliding member 6 is connected to an air cylinder 8, and a lock pivotally supported by the coupler body 2 is provided. The jaw 13 is biased by the spring 14 so that the king pin is introduced into the central groove 4 and engages with the lock jaw 13, and then the sliding member 6 is displaced by the air cylinder 8 to lock the lock jaw 13. ing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operating device for a coupler used in a semi-trailer tractor or dolly.

[0002]

[Prior Art]

 In the conventional coupler, since the jaws are locked and released manually, the occupant had to get out of the cab and come to the side of the coupler to operate them, which was actually very troublesome. In the remote operated coupler disclosed in Japanese Utility Model Publication No. 3-47983, the opening / closing lever for opening / closing and locking the connecting lock is operated by the wire rope from the driver's seat, but it is operated remotely by the wire rope. The operation was virtually uncertain, resulting in problems of convenience and safety.

[0003]

[Problems to be solved by the device]

 The present invention is intended to provide a reliable remote control device with a small number of parts.

[0004]

[Means for Solving the Problems]

 For this reason, the coupler operating device according to the present invention includes a link member mounted on the lower side of the coupler body and driven by a fluid pressure cylinder, a lock jaw pivotally supported by the coupler body and engaging and disengaging the king pin of the trailer, A lock mechanism that interlocks with the link member to lock the lock jaws and an operation switch of the fluid pressure cylinder provided in the cab are provided.

[0005]

[Action]

 Therefore, when the occupant operates the switch in the cab to operate the fluid pressure cylinder, the link member attached to the coupler body is driven to actuate the lock mechanism, and the lock jaw is engaged and disengaged from the kingpin. Can be remotely controlled.

[0006]

【Example】

 Hereinafter, embodiments of the present invention shown in the drawings will be specifically described. In FIG. 1, a body 2 of the coupler 1 is formed with a central groove 4 into which a kingpin of a trailer (not shown) is introduced from an opening 3, and a guide rail 5 is provided on the lower surface of the coupler body 2 in contact with the central groove 4. A sliding member 6 is guided by the rail 5.

On the other hand, an air cylinder 8 is pivotally supported by a pin 7 on the lower surface of the coupler body 2, one end of a doglegged lever 10 is pivotally attached to a piston tip 9 of the air cylinder 8, and a central portion of the lever 10 is pivotally supported by a sliding member 6. A pin 12 protruding downward from the lower surface of the coupler body 2 is engaged with a long hole 11 formed at the other end of the lever 10 while being supported. A lock jaw 13 having a substantially U-shape is pivotally supported on the lower surface of the coupler body 2 on the side opposite to the sliding member 6 in the vicinity of the central groove 4, and the lock jaw 13 is biased by a spring 14 in the counterclockwise direction in the figure. The one end 15 is in contact with the tip recess 16 of the sliding member 6.

Further, a normally open jaw lock switch 20 and a normally open switch 21 are provided on the lower surface of the coupler body 2, and a normally open switch 23 closed by an arm 22 of the piston tip 9 is attached to the air cylinder 8. It is installed. As shown in FIG. 3, the coupler lock switch 24 installed in the driver's seat in the cab is connected in series with the jaw lock switch 20 and the four-way solenoid valve 25. The air supply pipe 26 and one of the suction / exhaust pipes 27 of the air cylinder 8 communicate with each other, and the other of the suction / exhaust pipes 27 communicates with the atmosphere opening pipe 28.

In the state of FIG. 1, the jaw lock switch 20 and the coupler lock switch 24 are opened and the solenoid valve 25 is demagnetized as shown in FIG. 3, and the air cylinder 8 is connected to the intake / exhaust pipe 27 from the air supply pipe 26. After that, air pressure acts on the piston contraction side to maintain the unlocked state of the king pin, and at the same time, the arm 23 of the piston tip 9 closes the switch 23 to unlock the lock release lamp (not shown) in the cab. The occupant is informed that the kingpin is unlocked.

From this state, when the kingpin 30 of the trailer is introduced into the central groove 4 through the opening 3 as shown in FIG. 2, the kingpin 30 resists the spring force of the spring 14 and locks the lock jaw 13 to the timepiece of FIG. It is rotated in the direction, and reaches the innermost part of the central groove 4 while being sandwiched by the lock jaws 13, and at this time, the lock jaws 13 close the jaw lock switch 20.

Therefore, when the occupant operates the coupler lock switch 24 in the cab to close it, the solenoid valve 25 is excited and the air cylinder 8 is supplied with air from the air supply pipe 26 through the intake / exhaust pipe 27 to the piston extension side. Pressure acts to rotate the lever 10 in the clockwise direction in FIG. 2 around the pin 12 in the elongated hole 11, so that the sliding member 6 is guided by the guide rail 5 and is driven so as to cross the central groove 4. As shown in FIG. 2, the lock jaw 13 is locked to lock its rotation in the counterclockwise direction, and at the same time, the front end of the sliding member 6 closes the switch 21 and the switch 21 is not shown. Turn on the lock light to notify the passenger that the kingpin lock operation is complete.

Next, when the occupant opens the coupler lock switch 24 in the cab, the solenoid valve 25 is demagnetized, and the air cylinder 8 is supplied with air pressure from the air supply pipe 26 through the suction / discharge pipe 27 to the piston contraction side. Then, the lever 10 rotates in the counterclockwise direction in FIG. 2 about the pin 12, so that the sliding member 6 is retracted from the central groove 4 while being guided by the guide rail 5, and the engagement with the lock jaw 13 is performed. When the king pin 30 is disengaged from the central groove 4 by driving the tractor or the like, the lock jaw 13 is rotated clockwise by the spring force of the spring 14 in FIG. 1, the one end 15 of the sliding member 6 is brought into contact with the recess 16 of the tip of the sliding member 6, and the switch 22 is closed by the arm 22 of the piston tip 9 to turn on the lock release lamp in the cab. Notify the passenger that the kingpin is unlocked.

In the above device, the passenger can open and close the coupler lock switch 24 in the cab to operate the air cylinder 8 to lock and unlock the kingpin 30 by the lock jaws 13. Since it can be operated remotely without falling from the ground, it is highly convenient and enhances the safety of the operation. Also, since it is driven by the air cylinder 8, the locking and unlocking operation of the kingpin is performed reliably, and the work is extremely difficult. It can be performed easily and quickly, and it is convenient because it is possible to accurately know the locking and unlocking of the king pin 30 by the lock jaws 13 by turning on the switches 21 and 23 in the cab. Can be easily applied to various trailers, and the number of parts is relatively small. There is a place.

In the above-mentioned device, the lock jaws are locked and unlocked by the lock jaws by the air cylinder 8. However, it goes without saying that a hydraulic cylinder or the like can be appropriately used as the power source.

[0015]

[Effect of the device]

 In the coupler operating device according to the present invention, since the fluid pressure cylinder can be positively operated by the switch operation of the occupant in the cab, the engagement / disengagement of the kingpin can be easily performed at a distance. It is extremely reliable and safe, and its practical benefits are enormous.

[Brief description of drawings]

FIG. 1 is a bottom view of essential parts in an embodiment of the present invention.

FIG. 2 is an explanatory view of the operation of the above embodiment.

FIG. 3 is a layout view of main parts of the above embodiment.

[Explanation of symbols]

 1 Coupler 2 Coupler Body 4 Center Groove 5 Guide Rail 6 Sliding Member 8 Air Cylinder 10 Lever 13 Lock Jaw 20 Jaw Lock Switch 24 Coupler Lock Switch 25 Four-way Solenoid Valve 26 Air Supply Pipe 27 Suction and Discharge Pipe 30 Kink Pin

Claims (1)

[Scope of utility model registration request] 1. A link member mounted below a coupler body and driven by a fluid pressure cylinder, a lock jaw pivotally supported by the coupler body for engaging and disengaging a king pin of a trailer, and the lock jaw interlocking with the link member. A coupler operating device having a locking mechanism for locking and an operating switch for the fluid pressure cylinder provided in the cab.