JP2008001234A - Container handling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container handling vehicle which can reduce a force required for turning a handling arm with a lift cylinder, efficiently and smoothly turn the handling arm thereby, and miniaturize the lift cylinder. <P>SOLUTION: The container handling vehicle is equipped with an approximately L shaped handling arm 2 turnably supported in the longitudinal direction through a dump frame 2a at the rear end part of a vehicle body 1. In the container handling vehicle, the handling arm 2 has a hook 23 freely engaged with and disengaged from the container at the tip end, and a fastening device 4 for integrally fastening the handling arm 2 and the dump frame 2a is provided. The container C is loaded and unloaded between on the vehicle body 1 and on the ground by turning the handling arm 2 in the longitudinal direction through a telescopic operation of the lift cylinder 24 connected with the handling arm 2 and the vehicle body 1, and the container C is freely inclined on the vehicle body 1. The base end part of the lift cylinder 24 is mounted to the vehicle body 1 side in a movable state in the vertical direction through a moving mechanism 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

    The present invention relates to a container handling vehicle for loading and unloading a container between a vehicle body and the ground, and more particularly to a mounting structure for a lift cylinder connected to a vehicle body and a cargo handling arm.

  Conventionally, a hook provided at the tip of a cargo handling arm is engaged with an engagement pin of the container, and the cargo handling arm is rotated in the front-rear direction by a lift cylinder connected to the vehicle body and the cargo handling arm, whereby the container is placed on the vehicle body and on the ground. Container handling vehicles that can be loaded and unloaded are provided.

  Specifically, the cargo handling arm is connected to a dump frame rotatably supported at the rear end of the vehicle body, and the horizontal end of the cargo handling arm is connected to the container at the front end of the horizontal portion. A vertical portion having a hook is erected from the front end of the horizontal portion and is formed in a substantially L shape as a whole.

  When the container is lowered from the vehicle body to the ground, the lift cylinder is extended to rotate the entire cargo handling arm backwards. Conversely, when the container is loaded from the ground onto the vehicle body, the lift cylinder is retracted. Therefore, the operation is reversed.

In addition, when discharging loads such as garbage stored in a container, the cargo handling arm and the dump frame are integrally secured by a securing device, and in this state, the cargo handling arm is attached to the dump frame by the extension operation of the lift cylinder. At the same time, the container is rotated backward to tilt the container upward on the vehicle body (see, for example, Patent Document 1).
JP 2006-96066 A

  However, in the above-described conventional one, the lift cylinder is rotatably supported by pin connection at the base end portion thereof at a predetermined position of the vehicle body and at the front end of the telescopic rod at a predetermined position of the cargo handling frame.

  In other words, the tilt angle of the lift cylinder changes as the cargo handling frame is rotated in the front-rear direction, but the lift cylinder mounting position relative to the vehicle body and the cargo handling frame is constant. The inclination angle of all lift cylinders is determined by the mounting position.

  Therefore, even if the cargo handling frame can be efficiently rotated by changing the tilt state of the lift cylinder depending on the rotation position of the cargo handling frame, this cannot be achieved.

  The object of the present invention is to change the vertical position of the base end of the lift cylinder with respect to the vehicle body according to the rotation state of the cargo handling arm, thereby increasing the force of the lift cylinder necessary to rotate the cargo handling arm. It is intended to provide a container handling vehicle that can reduce the load and thereby efficiently and smoothly rotate the handling arm and reduce the size of the lift cylinder.

  In order to achieve the above object, the container handling vehicle according to the first aspect of the present invention has a substantially L-shaped rear end supported rotatably at the rear end of the vehicle body in the front-rear direction via a dump frame. The cargo handling arm includes a hook that is detachable from the container at the tip of the cargo handling arm, and is provided with a lashing device that integrally secures the cargo handling arm and the dump frame. A container handling vehicle in which the container is loaded and unloaded between the vehicle body and the ground by rotating this cargo handling arm in the longitudinal direction by the expansion and contraction of the lift cylinder connected to the vehicle, or the container can be tilted on the vehicle body The lift cylinder has a base end portion attached to the vehicle body side in a state of being movable in the vertical direction via a moving mechanism.

  In the container handling vehicle according to the second aspect of the present invention, the moving mechanism includes a link having a base end portion rotatably provided on the vehicle body and a tip end portion rotatably supported by the base end portion of the lift cylinder. Is.

  According to the present invention, it is possible to reduce the force of the lift cylinder necessary for rotating the cargo handling arm, and thereby, the cargo handling arm can be efficiently and smoothly rotated by a lift cylinder with a smaller force than before. In addition, the lift cylinder can be made smaller with respect to the scale of the cargo handling arm.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a configuration of a cargo handling device provided in a container cargo handling vehicle of the present invention.

  In FIG. 1, 2 is a cargo handling arm provided on the vehicle body 1 of the vehicle, and this cargo handling arm 2 is arranged vertically with an outer arm 21 arranged horizontally in a state where the container C is mounted. And a telescopic arm 22 formed in a substantially L shape having a vertical portion 22b.

  The outer end of the outer arm 21 is rotatably supported on the middle portion of the dump frame 2a. The rear end portion of the dump frame 2a is rotatably supported on the rear end portion of the vehicle body 1 of the vehicle.

  The telescopic arm 22 is formed in a substantially L shape by a horizontal portion 22a inserted into the outer arm 21 and a vertical portion 22b erected from the front end portion of the horizontal portion 22a. The horizontal portion 22a is shown in the figure. The outer arm 21 can be extended and contracted in the longitudinal direction by a non-extending cylinder.

  The vertical portion 22b is provided with a hook 23 that is detachable from an engaging pin provided in the container C at the tip thereof.

  A lift cylinder 24 is connected between the outer arm 21 and the vehicle body 1. Specifically, the base end portion 24 a of the lift cylinder 24 is connected to the vehicle body 1 side, and the telescopic rod end 24 b is connected to the middle portion of the outer arm 21. Is configured to be rotatable in the front-rear direction.

  Here, the base end portion of the lift cylinder 24 is connected to the vehicle body 1 via the moving mechanism 3. As shown in FIG. 2, the moving mechanism 3 includes a link 31 having a predetermined length that is pivotally provided on the vehicle body 1 by a pin 32, and a lift cylinder 24 is connected to the distal end of the link 31. The base end portion 24a is rotatably supported by the pin 33.

  By connecting the base end 24a of the lift cylinder 24 to the vehicle body 1 through the link 31 in this way, the base end 24a of the lift cylinder 24 is attached so as to be movable in the vertical direction. Note that a stopper 35 that restricts the downward rotation of the link 31 is provided below the link 31.

  Further, the cargo handling arm 2 is provided with a securing device 4. The lashing device 4 is used to lash the cargo handling arm 2 together with the dump frame 2a and to release the lashing, and is configured as follows.

  The lashing device 4 includes a lashing hook 42 that can be engaged with and disengaged from a lashing pin 41 provided at the tip of the dump frame 2a. The lashing hook 42 has a base end portion (upper end portion) provided on the base end portion side of the outer arm 21 so as to be pivotable back and forth by a pin 42a, and is formed slightly closer to the front end portion (lower end portion). The hooked portion is adapted to engage with the lashing pin 41 from the front.

  Then, using the operation of extending and retracting the telescopic arm 22 with respect to the outer arm 21, the tying hook 42 is pivoted back and forth by the operating rod 43 connected to the tying hook 42 to be engaged with and disengaged from the tying pin 41. By doing so, the cargo handling arm 2 is integrally secured together with the dump frame 2a, and the securing is released.

  As the container C, an open type whose upper surface is opened or a sealed type whose upper surface is also closed is used, and the rear wall can be opened and closed so that the load can be discharged. Although not shown, the engaging pin is provided at the upper part of the front wall of the container C, a support leg is provided at the front part of the bottom surface of the container C, and a roller is provided at the rear part of the bottom surface of the container C.

  Furthermore, a support roller 11 for smoothly loading and unloading the container C between the vehicle body 1 and the ground is provided at the rear end portion of the vehicle body 1.

  The loading and unloading of the container C by the cargo handling vehicle is performed by first retracting the horizontal portion 22a of the telescopic arm 22 with respect to the outer arm 21 by the telescopic cylinder in a state where the container C is mounted as shown in FIG. The upper container C is slid backward by a predetermined length. As a result, the lashing hook 42 is detached from the lashing pin 41, and the cargo handling arm 2 becomes free from the dump frame 2a.

  In this state, the lift cylinder 24 is extended and the outer arm 21 is rotated upward together with the telescopic arm 22 to tilt the container C, whereby the container C is lowered from the vehicle body 1 to the ground. Further, the container C on the ground can be loaded (lifted) onto the vehicle body 1 by the reverse operation to that described above.

  On the other hand, when discharging the load loaded in the container C, the outer arm 21 and the dump frame 2a are integrally secured by the securing device 4 without retracting the telescopic arm 22 with respect to the outer arm 21. In this state, the lift cylinder 24 is extended and the entire cargo handling device is rotated upward to tilt the container C with respect to the vehicle body 1, thereby discharging the load in the container C.

  By the way, since the base end 24a of the lift cylinder 24 is connected to the vehicle body 1 so as to be movable up and down when the container C is loaded and unloaded by the expansion and contraction operation of the lift cylinder 24 and during the tilting operation, The lift cylinder 24 changes its posture as follows in accordance with the rotation operation 2.

  First, as shown in FIG. 1, in the initial stage of rotating the cargo handling arm 2 upward, the lift cylinder 24 tries to push up the cargo handling arm 2, so that the base end portion 24 a of the lift cylinder 24 is moved downward. A force acts, whereby the base end portion 24a of the lift cylinder 24 moves downward through the link 31, and the inclination of the lift cylinder 24 increases as shown by the one-dot chain line in FIG. Thereby, the force when the lift cylinder 24 extends is easily transmitted to the cargo handling arm 2, and the cargo handling arm 2 is rotated in this state.

  When the container C is lowered to the ground, as described above, only the cargo handling arm 2 rotates rearward while the dump frame 2a remains unchanged. As the lift cylinder 24 is pulled along with this rotation, the base end portion 24a of the lift cylinder 24 gradually moves upward through the link 31, and the container C is lowered to the ground so that the cargo handling arm 2 is moved. When the lift cylinder 24 is rotated to the end, the inclination of the lift cylinder 24 moves upward from the position indicated by the alternate long and short dash line in FIG. 3 to the position indicated by the solid line and becomes nearly parallel.

  Therefore, as shown in FIG. 3, at the initial stage of loading (pulling up) the container C by rotating the cargo handling arm 2 that has been rotated backward, the base end portion 24 a of the lift cylinder 24 is moved upward. The lift cylinder 24 is moved and is almost horizontal. Thereby, the force when the lift cylinder 24 is retracted is easily transmitted to the cargo handling arm 2, and the cargo handling arm 2 is rotated in this state.

  Similarly, when the container C is tilted, the base end portion 24a of the lift cylinder 24 is moved downward through the link 31 in the initial stage, and the tilt of the lift cylinder 24 is increased as shown by a one-dot chain line in FIG. . Thereby, the force when the lift cylinder 24 extends is easily transmitted to the cargo handling arm 2, and the cargo handling arm 2 is rotated in this state.

  Thus, the force of the lift cylinder 24 required to rotate the cargo handling arm 2 can be reduced by changing the posture of the lift cylinder 24 by the change of the rotational position accompanying the rotation of the cargo handling arm 2. Thus, the load handling arm 2 can be efficiently and smoothly rotated by the lift cylinder 24 with a smaller force than before, and the lift cylinder 24 can be downsized with respect to the scale of the load handling arm 2.

  4A and 4B show another configuration of the moving mechanism, where FIG. 4A is a plan view and FIG. 4B is a side view.

  This moving mechanism includes a pair of left and right links 36, and a base end portion 24 a of the lift cylinder 24 and a bracket 1 a provided on the vehicle body 1 are connected in a state of being sandwiched by these links 36.

  FIG. 5 shows still another configuration of the moving mechanism.

  This moving mechanism is such that the link 31 of the moving mechanism 3 described in FIG. 2 is arbitrarily rotated by the expansion / contraction operation of the expansion / contraction cylinder 37. Specifically, the expansion / contraction rod end of the expansion / contraction cylinder 37 is connected to the sub-link 37a. To the base end of the link 31.

  As a result, the base end portion 24a can be reliably and smoothly moved while preventing the base end portion 24a of the lift cylinder 24 from rapidly moving up and down.

  FIG. 6 shows still another configuration of the moving mechanism.

  In this moving mechanism, instead of the expansion / contraction cylinder 37 of the movement mechanism 3 described with reference to FIG. 5, an expansion / contraction cylinder 38 provided with a spring 38a is provided on the bottom side, and the base end 24a of the lift cylinder 24 is connected to the spring 38a. It moves upwards against the urging force.

  FIG. 7 shows still another configuration of the moving mechanism.

  This moving mechanism connects the bottom side and the rod side of the telescopic cylinder 38 of the moving mechanism 3 described with reference to FIG. 6 through a pipe line 39 provided with a throttle valve 39a, and the bottom side and the rod side through the pipe line 39. I try to exchange oil. Thereby, the base end part 24a can be smoothly moved while preventing the base end part 24a of the lift cylinder 24 from moving up and down rapidly.

It is a side view which shows the structure of the cargo handling apparatus in the container handling vehicle of this invention. It is a figure which shows the structure of a moving mechanism. It is a side view which shows the cargo handling apparatus at the time of unloading of a container. It is a figure which shows the other structure of a moving mechanism. It is a figure which shows the other structure of a moving mechanism. It is a figure which shows the other structure of a moving mechanism. It is a figure which shows the other structure of a moving mechanism.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car body 2 Handling frame 2a Dump frame 23 Hook 24 Lift cylinder 24a Base end part 3 Movement mechanism 31 Link 4 Locking device C

Claims (2)

The rear end portion is provided with a substantially L-shaped cargo handling arm supported at the rear end portion of the vehicle body so as to be pivotable in the front-rear direction via a dump frame. In addition to having a hook, a lashing device that ties the cargo handling arm and the dump frame together is provided, and the cargo handling arm is rotated in the front-rear direction by the expansion and contraction of the lift cylinder connected to the cargo handling arm and the vehicle body. In a container handling vehicle in which the container is loaded and unloaded between the vehicle body and the ground, or the container can be tilted on the vehicle body,
A container handling vehicle, wherein a base end portion of the lift cylinder is attached to a vehicle body side in a state of being movable in a vertical direction via a moving mechanism.   2. The container handling system according to claim 1, wherein the moving mechanism includes a link having a base end portion rotatably provided on a vehicle body and a tip end portion rotatably supported by a base end portion of a lift cylinder. Vehicle.

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