JPH0347983Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The coupler of the present invention has a remote control system that can remotely control the opening/closing lever for separating the king pin fixed to the trailer and the coupler placed on the tractor. It concerns type couplers.

[Conventional technology]

An opening/closing lever is used to release the coupler placed on the tractor from the kingpin that is secured to the trailer. The operation of this opening/closing lever can be completed with one-way operation, but relatively many couplers with improved safety require two-way operation.

FIG. 6 is a bottom view showing an example of a conventional coupler with improved safety.

This coupler is disclosed in Japanese Unexamined Patent Publication No. 141974/1982, and its outline will be described below.

In FIG. 6, the left and right connecting locks 1 are supported by lock pins 2 so as to be rotatable in left and right horizontal directions. The locking piece 3 is pressed in the direction of the king pin 5 by the spring 4 so that one end can be inserted into the head of the connecting lock 1, and the other end can be inserted into the guide hole 7 of the outer peripheral rib 6 of the main plate 18. It's getting old.

The opening/closing lever 8 has a horizontal rotation fulcrum (pin) 9 at one end.
It has an elongated hole 15 into which it is inserted, and has a grip part 10 at the other end, which engages with the recess 11 of the locking piece 3 as shown in FIG. There is.

Further, a protrusion 17 is provided at an arbitrary location, and the distance from the protrusion 17 to the rotation fulcrum 9 when the rotation fulcrum 9 is located at the right end of the elongated hole 15 is provided on the main plate 18 with the rotation fulcrum 9 as the center. A guide rib 19 is provided which has a radius of curvature approximately equal to .

Further, the opening/closing lever 8 is provided with a protrusion 20 between the engagement part with the locking piece 3 and the pivot point 9, so that the pivot point 9
3 is engaged with one end of a swinging rod 21 that swings around centering point 3. Further, a stopper 22 is connected to the other end of the swinging rod 21 so as to be located between the swinging rod 21 and the other end.

In the above configuration, as shown in FIG. 6, in order to release the king pin 5 in the connected state,
First, when the grip portion 10 is grasped and pulled in the direction of arrow A, the opening/closing lever 8 moves to the left against the contraction force of the spring 16 until the pivot point 9 abuts the right end of the elongated hole 15.

Therefore, the swinging rod 21 for moving the protrusion 20 to the left rotates clockwise about the swing fulcrum 23, and the stopper 22 moves to the right. Here, when the opening/closing lever 8 is moved upward as shown by the arrow B, the protrusion 17 fixed to the opening/closing lever 8 is moved to the guide rib 1.
Move along 9. At the same time, the locking piece 3 also moves upward against the tension of the spring 4, so the locking piece 3 separates from the head of the connecting lock 1 and locks into the kingpin 5.
is in a state where it is possible to leave.

As described above, the coupler described above is highly safe because the opening/closing lever must be operated in two directions in order to separate from the king pin.

[Problems to be Solved by the Invention] The operation of the opening/closing lever described above is extremely troublesome for the tractor driver.

The purpose of this invention is to enable the driver to detach and connect the kingpin fixed to the trailer and the coupler mounted on the tractor by operating the opening/closing lever without leaving the vehicle, and by using a highly safe remote control system. The aim is to provide an operable coupler.

[Means to solve the problem]

The remote-controlled coupler of the present invention includes a half-split kingpin connecting lock that rotates in the left-right direction on the underside of the main plate, and is pressed in the kingpin direction by an elastic member, and one end is inserted into the head of the connecting lock. a locking piece that can be fitted and whose other end can be fitted into a guide hole in an outer circumferential rib of the main plate; and a locking piece that horizontally rotates around a rotation fulcrum that is fitted into an elongated hole provided near the inner end;
An opening/closing lever whose inner end is pulled by an elastic member and engages with the locking piece is connected to a stopper whose one end engages with the opening/closing lever and whose other end moves between the locking piece and the outer circumferential rib. a swinging rod, and further curved on the lower surface of the main plate with a radius of curvature approximately equal to the maximum distance from a protrusion provided at an arbitrary position of the opening/closing lever to the pivoting fulcrum, centered on the pivoting fulcrum. In the coupler provided with a guide rib, a sliding piece having an elongated hole in the longitudinal direction is loosely fitted into the elongated hole near the outer end of the opening/closing lever.
A vertical pin protruding from the opening/closing lever is inserted and fitted, and an L-shaped cam is rotatably attached to the sliding piece, one end of which is engaged with the vertical pin, and a wire rope is locked to the other end; Further, a guide member, which is curved with a radius of curvature centered on the rotational fulcrum, is provided protruding from the main plate and comes into sliding contact with the sliding piece.

[Effect]

When the wire rope attached to the other end of the L-shaped member is pulled, the L-shaped member rotates and its one end presses against the vertical pin. Therefore, the opening/closing lever moves toward the outside of the main plate, and by further pulling the wire rope, the opening/closing lever acts in the same manner as when the opening/closing lever is operated directly by hand as in the prior art, and the king pin is released. It forces you.

〔Example〕

Hereinafter, embodiments of the present invention will be described in more detail based on the drawings.

Figures 1 to 4 are bottom views of the coupler, with Figure 1 showing the coupled state, Figure 2 showing the stopper released state when detached, and Figure 3 showing the released state of the locking piece when detached.
FIG. 4 shows the connection preparation state. FIG. 5 is an enlarged view of the main parts of the opening/closing lever.

In Figures 1 to 5, below the main plate 18, there is a half-split connecting lock 1 supported by a lock pin 2 that rotates in the left-right direction to connect the king pin 5, and an elastic member such as a spring 4. One end can be inserted into the head of the connecting lock 1 (FIG. 1 shows the inserted state), and the other end can be inserted into the guide hole 7 of the outer peripheral rib 6 of the main plate 18. A locking piece 3 that can be fitted into the locking piece 3, and a rotation fulcrum 9 that is made of a pin or the like that is inserted into an elongated hole 15 provided near the inner end.
The locking piece 3 rotates horizontally with the inner end pulled by an elastic member such as a spring 16.
The opening/closing lever 8 is engaged with the recess 11 (see FIG. 7) of the opening/closing lever 8, one end of which is engaged with the protrusion 20 of the opening/closing lever 8, and the other end is between the other end of the locking piece 3 and the outer peripheral rib 6. The swinging fulcrum 2 is connected to the stopper 22 that moves the
3, and a swinging piece 21 that swings around the pivot point 9 of the opening/closing lever 8,
The maximum distance from this rotation fulcrum 9 to the protrusion 17 provided at an arbitrary position of the opening/closing lever 8, that is, as shown in FIG. A guide rib 19 is provided that curves with a radius of curvature approximately equal to the distance from the pivot point 9 to the protrusion 17 when located at the right end of the guide rib 19 .

A sliding piece 12 having a longitudinal elongated hole 24 near its outer end is loosely fitted into the opening/closing lever 8 as shown in FIG. It is inserted inside.

Further, an L-shaped cam 13 is attached to the sliding piece 12 so as to be rotatable around a pin 26, one end of which is engaged with a vertical pin 25, and a wire rope 14 is locked to the other end. .

Furthermore, the main plate 18 has an opening/closing lever 8.
A guide member 27 that is curved with a radius of curvature centered on the rotation fulcrum 9 is provided in a protruding manner, and one end of the sliding piece 12 is slidably in contact with the guide member 27 .

Note that a grip portion 10 is provided at the outer end of the opening/closing lever 8, so that the driver can directly operate the opening/closing lever 8 manually, as in the conventional case.

In the above structure, when in the connected state as shown in FIG.
2 is always in contact with the guide member 27 as shown in FIG.

When the wire rope 14 is pulled in the direction of the arrow, the L-shaped cam 13 rotates clockwise around the pin 26, so that the vertical pin 25
pressed by one end of the

Therefore, the opening/closing lever 8 moves to the left against the pulling force of the spring 16, and at the same time moves the stopper 22 to the right via the swinging piece 21, resulting in the stopper release state shown in FIG.

When the wire rope 14 is further pulled, the sliding piece 12 loosely fitted to the opening/closing lever 18 slides along the guide member 27, and the locking piece 3 becomes in the released state as shown in FIG.

When the tractor moves forward in this state, the coupling lock 1 opens in the left-right direction, the king pin 5 detaches, and the connection preparation state shown in FIG. 4 is established, completing the detachment work of the trailer and the tractor.

As the means for pulling the wire rope 14, known techniques can be used, such as appropriately arranging a wire sheave and installing a wire winding drum at the driver's seat.

Furthermore, when connecting a trailer and a tractor, it is necessary to loosen the wire rope in preparation for connection, but this can also be handled by known techniques such as using a tensioner.

[Effect of idea]

As is clear from the above explanation, the remote control coupler according to the present invention allows the driver to detach and connect the trailer and tractor without leaving the vehicle, reducing work time and improving operating efficiency. ,
It brings about many positive results, such as environmental improvement, and is highly safe.

[Brief explanation of the drawing]

Figures 1 to 4 are bottom views of the coupler of the present invention, Figure 5 is an enlarged view of the main parts of the opening/closing lever, Figure 6 is a bottom view of the conventional coupler, and Figure 7 is a sectional view taken along line AA in Figure 6. It is. 1: Connecting lock, 3: Locking piece, 4: Spring,
5: King pin, 6: Outer rib, 7: Guide hole,
8: Opening/closing lever, 9: Rotating fulcrum, 12: Sliding piece,
13: L-shaped cam, 14: Wire rope, 15:
Long hole, 16; Spring, 17: Projection, 18:
Main plate, 19: Guide rib, 21: Swing rod, 22: Stopper, 24: Long hole, 25: Vertical pin, 27: Guide member.

Claims (1)

[Scope of utility model registration request] At the bottom of the main plate is a half-split kingpin connecting lock that rotates in the left-right direction, and is pressed in the kingpin direction by an elastic member, one end of which can be inserted into the head of the connecting lock, and the other end of which is inserted into the head of the connecting lock. It rotates horizontally around a locking piece that can be fitted into a guide hole in the outer peripheral rib of the main plate and a rotation fulcrum that is fitted into an elongated hole provided near the inner end, and the inner end is pulled by an elastic member. an opening/closing lever engaged with the locking piece; and a swinging rod having one end engaged with the opening/closing lever and the other end connected to a stopper that moves between the locking piece and the outer circumferential rib; On the bottom surface of the main plate,
The coupler is provided with a guide rib that is curved with a radius of curvature approximately equal to the maximum distance from a protrusion provided at an arbitrary position of the opening/closing lever to the rotational fulcrum, with the pivot point as the center. A sliding piece having an elongated hole in the longitudinal direction near the end is loosely fitted, a vertical pin from which an opening/closing lever protrudes is inserted into the elongated hole, and an L-shaped cam is rotated on the sliding piece. A guide member that is freely attached and has one end engaged with a vertical pin, and a wire rope is locked to the other end, and is curved with a radius of curvature centered on the rotation fulcrum, is provided protruding from the main plate. A remote control coupler characterized by sliding contact with a sliding piece.