JPS6150806A - Coupling lock switching mechanism - Google Patents

Abstract

PURPOSE:To ensure maintenance of preparation condition by forming a projection on which a ping can get over when a coupling lock is transferred to coupling condition on a trip lever in a coupling lock switching mechanism of a tractor fifth wheel and a trailer king pin. CONSTITUTION:When a tractor is released from the condition where an operation lever 8 is moved to the arrow mark direction and a projection 13 of a locking block 3 is engaged with a notch of a trip lever 10, a king pin 1 is released from coupling locks 4, 5. And the coupling lock 5 rotates around a shaft 12 and a pin 9 presses the trip lever 10 to rotate to the right direction. During the time, the pin 9 is got over a projection 15 from the rotating folcrum side of the trip lever 10 and the projection 13 of the locking block 3 is released from the notch 14 of the trip lever 10. And the locking block 3 is contacted to the coupling locks 4, 5 to become preparation condition. Then, maintenance of the preparation condition can be ensured.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a coupling lock suitable for detachably coupling a fifth wheel disposed on a tractor and a king pin fixed to a trailer. Regarding Tomo Saizo.

[Conventional technology]

4.5 both show a conventionally used connecting lock opening/closing device 6η, and FIG. 4 shows a state in preparation for connection.

That is, when the king pin 1 fixed to the trailer is detached from the fifth wheel disposed on the tractor, the locking block 3 pressed by the spring 2 rotates using the glaze 12 as a support, and the half-split is opened from side to side. The spring 1 contacts the head 6.7 of the connecting lock 4.5.
The trip lever 10 pulled by the king pin 1 engages with a pin protruding from one of the connecting locks 5 to maintain a state in which the king pin 1 can be removed, that is, a state in which the connection is ready.

However, when the operating lever 8 comes into contact with something and moves in the direction of the arrow, the locking block 3 moves against the heads 6 of the connecting locks 4 and 5.
, 7.

Then, since the trip lever 10 that engages with the pin 9 protruding from the connecting lock S is pulled by the spring 11, the connecting lock 5 is rotated to the right by using the pin 9 about the yuzuri 12 as a fulcrum. The state shown in Figure 5 is reached.

In this state, the king pin 1 cannot be connected to the connecting lock 4.5, and the trailer cannot be connected to the tractor.

[Problem that the invention seeks to solve]

SUMMARY OF THE INVENTION An object of the present invention is to provide a connecting lock opening/closing device that can reliably maintain the connecting lock with a simple operation.

[Means for solving problems]

The present invention provides a half-split kingpin connecting lock that rotates in the left and right horizontal directions on the lower surface of the fifth wheel, a locking block that intervenes between the head of the connecting lock and prevents the connecting lock from rotating; The trip lever is equipped with a trip lever that engages with a pin protruding from the connecting lock to maintain the connected state of the connecting lock. A horizontal protrusion is provided at the part that contacts the provided pin, and this protrusion connects the connecting lock Δ′! The pins are arranged so that they can be bumped during the transition from the ready state to the connected state.

(Example) 1 to 3 are plan views of main parts showing an example of an HJ according to the present invention, in which FIG. 1 is a connected type, FIG. ΦIt is an urgent matter of mourning.

In FIG. 1, the kingpin 1 is connected by the locks 4 and 5, and the locking pro 2 and 3 intervene between the heads 6170 of the locks 4 and 5 to control the rotation of the connecting lock 4 and 5. It has been blocked! ! It is.

FIG. 2 shows that by moving the operating lever 8 in the direction of the arrow, the locking block 3 is moved upward in the figure against the tension of the spring 2, and the protrusion 13 of the locking block 3 and the trip lever 10 are disengaged. This is the state in which the notch 14 is engaged.

In this state, when the tractor leaves the range, the connecting lock 4.5 will move from the connecting pin 1 to 2, and the connecting lock 5 will move to N+.
The pin 9 pushes the trip lever 10 against the tensile force of the spring 11 and rotates it to the right m9.

The trip lever 10 is provided with a horizontal protrusion 15 at a portion where the pin 9 comes into contact with the locking block 3.
In the state shown in FIG. 2 in which the protrusion 13 and the notch 14 of the trip lever are engaged, the pin 9 is closer to the pivot point of the trip lever 10 than the protrusion 5 is. However, when the connecting lock 5 is rotated counterclockwise 9 and the pink is turned to trip/(-) in the Ishikawa direction, the pin 9 goes over the protrusion 15 (1i21).
This will happen. At the same time that the pin 9 passes over the protrusion 15 of the trip lever 10, the protrusion σ 13 of the locking block 3 separates from the notch 14 of the trip lever 10, and the locking block 3 contacts the connecting lock 4.5, as shown in FIG. The state will be as follows.

FIG. 3 shows the connection preparation state. In this state, if the operation lever 8 were to move in the direction of the arrow, the pin 9 fixed to the connection lock 5 would move against the protrusion 15 of the trip lever 10.
[Effects of the Invention] As is clear from the above explanation, the connecting lock according to the present invention can be opened and closed by fixing it to the connecting lock 5. By providing the protrusion 15 on the trip lever 10 that contacts the pin 9, it is possible to reliably maintain the connected BA condition, and this has a significant effect on improving the safety and security of the fifth wheel. be.

[Brief explanation of drawings]

Figures 1, 2, and 3 are plan views of the main parts of the connecting lock according to the present invention, and Figures 4 and 5 are plan views of the main parts of the conventional product. 3: Locking block, 4.5: Round v3 tablet, 9
: Pin, 10: Trip lever, 15:
Protrusion agent patent attorney Takashi Honma! -1・□
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Claims (1)

[Claims] On the lower surface of the fifth wheel, there is a half-split kingpin connecting lock that rotates in the left and right horizontal directions, a locking block that intervenes between the head of the connecting lock and preventing the connecting lock from rotating, and one connecting lock. In a linking lock opening/closing mechanism that includes a trip lever that engages with a protruding pin to maintain the connection preparation state of the linking lock, the trip lever has a horizontally extending portion that contacts the pin that projects from the linking lock. A connecting lock opening/closing mechanism characterized in that a protrusion is provided, and the protrusion is arranged so that the pin can ride over the connecting lock while the connecting lock transitions from a connection preparation state to a connected state.