JP3586262B2 - Device for securing cargo handling arms of container handling vehicles - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container loading / unloading vehicle for unloading containers between a vehicle body and the ground, and more particularly to a loading / unloading arm securing device for securing a loading / unloading arm to a dump frame.
[0002]
[Prior art]
Conventionally, a container loading / unloading device in which a container provided between a vehicle body and the ground is unloaded between a vehicle body and a ground by engaging a hook provided at a tip of the loading arm with an engagement pin of the container and rotating the loading / unloading arm in the front-back direction. The vehicle provided with is provided.
[0003]
Specifically, the loading and unloading arm has a vertical portion having a horizontal frame rear end connected to a dump frame rotatably supported at the rear end of the vehicle body and having a hook at its front end capable of being disengaged from a container. Are erected from the front end of the horizontal portion and formed substantially in an L-shape as a whole.
[0004]
When the container is unloaded from the vehicle body to the ground, the cargo handling arm is rotated rearward, and when the container is loaded from the ground onto the vehicle body, the operation is performed in a reverse manner to the above.
[0005]
Also, when discharging the cargo stored in the container, the cargo handling arm and the dump frame are integrally secured by the cargo handling arm securing device, and the cargo handling arm is rotated back together with the dump frame to move the container upward. This is done by tilting.
[0006]
By the way, as a specific configuration of the above-mentioned cargo handling arm securing device, a hook which is locked to a locking member provided on a dump frame at a horizontal portion of the cargo handling arm to secure the cargo handling arm and the dump frame integrally is provided. And an operation lever provided on a vertical portion of the cargo handling arm is connected to the hook via a link mechanism, so that the hook is disengaged from the locking member by operating the operation lever.
[0007]
[Problems to be solved by the invention]
However, in the above-mentioned conventional cargo handling arm securing device, the operation lever provided on the vertical portion of the cargo handling arm is disposed in a narrow space between the driver's seat (cab) and the container, and such a narrow space is used. There is a problem that operability is poor when operating the operation lever in a space. In particular, when the size of the container cargo handling vehicle is reduced, the space becomes smaller, so that the operability is significantly deteriorated.
[0008]
In addition, since the hook is provided on the cargo handling arm side, the operation lever must be provided on the cargo handling arm side, and there is a problem that the mounting position of the operation lever is naturally regulated.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to improve the operability of an operation lever and to increase the degree of freedom of a mounting position of the operation lever. To provide a cargo handling arm securing device.
[0010]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a cargo handling arm securing device for a container handling vehicle, comprising: a horizontal portion having a rear end portion rotatably supported in a front-rear direction via a dump frame at a rear end portion of the vehicle body; And a vertical portion having a container and a hook at the front end thereof which can be disengaged from the front end of the portion, and has a substantially L-shaped cargo handling arm as a whole. By moving the container, the container is unloaded between the vehicle body and the ground, in the dump frame, the dump frame is locked to a locking member provided in the horizontal portion, the cargo handling arm A securing member for securing the dump frame integrally is provided, one end of the cable member is connected to the securing member via a link mechanism, and the other end of the cable member is connected to the vehicle body. Connected to the provided operation lever It is one in which lashing member is configured disengageably the locking member by operating the operation lever.
[0011]
According to a second aspect of the present invention, in the cargo handling arm securing device for a container cargo handling vehicle, the securing member is maintained in a locked state with the locking member unless the link mechanism is forcibly operated by operating an operation lever. It is configured to act in a direction.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 shows a container handling vehicle.
[0014]
The container handling vehicle is a small vehicle such as a minicar, for example, and has a container handling device for unloading and loading the container C on its body 1.
[0015]
The container handling device includes a loading arm 2 and an up-and-down cylinder 3 (see a two-dot chain line) for operating the loading arm 2.
[0016]
The cargo handling arm 2 is configured as a whole in an L-shape by a horizontal portion 21 that is horizontally arranged when the container C is mounted, and a vertical portion 22 that stands vertically from the tip of the horizontal portion 21 in the same state. Have been.
[0017]
The rear end of the horizontal portion 21 is rotatably supported at an intermediate portion of the dump frame 23 indicated by a two-dot chain line in FIG. 5, and the rear end of the dump frame 23 rotates to the rear end of the vehicle body 1. It is freely supported.
[0018]
The vertical portion 22 is provided at its tip with a cargo handling hook 24 that is detachable from an engaging pin C1 provided on the container C.
[0019]
The undulating cylinder 3 is connected between the horizontal portion 21 of the cargo handling arm 2 and the vehicle body 1. Specifically, the base end 31 of the undulating cylinder 3 is connected to the vehicle body 1, and the telescopic rod end 32 is connected to the middle of the horizontal part 21.
[0020]
The cargo handling arm 2 is provided with a cargo handling arm securing device 4 as shown in FIG. The cargo handling arm securing device 4 is for securing the cargo handling arm 2 integrally with the dump frame 23 and for releasing the securing, and is configured as follows.
[0021]
The cargo handling arm securing device 4 includes a securing hook 41 as a securing member that can be secured to a securing pin (a securing member) 2 a provided on the base end side of the horizontal portion 21 of the cargo handling arm 2, and a securing hook. An operation mechanism 43 is connected to the operation mechanism 41 via a link mechanism 42.
[0022]
The securing hook 41 has a base end rotatably provided forward and backward by a pin 41a at a distal end of the dump frame 23, and a hook 41b formed at the distal end is engaged with the locking pin 2a from the front. It is designed to stop.
[0023]
The link mechanism 42 has one end pivotally supported at an intermediate portion of the securing hook 41, a link rod 42 a arranged in the front-rear direction, and a pin 42 b connected to the other end of the link rod 42 a and pivotally supported by the dump frame 23. And a connection link 42c provided integrally and rotatably. The other end of the link rod 42a is formed in a curved portion 42d that resembles a substantially crescent shape of a lower chord when viewed from the side, and the curved portion 42d straddles the pin 42b from above and is located behind the pin 42b. The connecting link 42c is pivotally supported by a pin 42e.
[0024]
When the securing hook 41 is locked to the locking pin 2a as shown by a solid line in FIG. 2, the center of the pin 42e is a line connecting the pivot point between the securing hook 41 and the link rod 42a to the pin 42b. It is located below L. Therefore, even if an axial force is applied to the link rod 42a in this state, a clockwise force acts on the connecting link 42c in FIG. That is, by this action, the state in which the cargo handling arm 2 is integrally fastened together with the dump frame 23 is maintained, and the connecting link 42c is forcibly rotated counterclockwise to apply a forward force to the link rod 42a in the axial direction. As long as the locking hook 41 does not act, the locking hook 41 does not come off from the locking pin 2a and the locking is not released.
[0025]
Further, a spring 45 is connected between the link rod 42a and the dump frame 23, and the spring 45 urges the link rod 42a forward in the axial direction. That is, the urging force of the spring 45 urges the securing hook 41 to maintain the state locked by the locking pin 2a when the center of the pin 42e is located below the line L, When the center of the pin 42e is located above the line L, the securing hook 41 is urged so as to maintain a state of being detached from the locking pin 2a.
[0026]
The locking hook 41, the link mechanism 42, and the locking pin 2a configured as described above are provided in a pair on the left and right as shown in FIG. 3 except for the pin 42e that is shared.
[0027]
The operation mechanism 43 includes an operating link 43a provided rotatably integrally with the pin 42a, a push-pull cable 43b as a cable member having one end connected to the operating link 43a, and a push-pull cable 43b. And an operation lever 43c (see FIG. 3) connected to the other end.
[0028]
The operation link 43a is provided integrally with the pin 42a in a state where the operation link 43a and the connection link 42c are arranged in an eight-shape in a side view, and one end of a push-pull cable 43b is connected to this end.
[0029]
The push-pull cable 43b is guided backward through an appropriate number of guides 43d as shown in FIG. 3 and then U-turned and guided forward along one side of the vehicle body 1.
[0030]
The operation lever 43c is provided on one front side of the vehicle body 1 as shown in FIG. More specifically, the base end portion of the operation lever 43c is pivotally supported by the vertical pin on the vehicle body 1 side (for example, a zub frame), and the distal end operation portion is provided to be rotatable back and forth around the vertical pin. At the same time, the other end of the push-pull cable 43b is connected to the base end.
[0031]
At the front position shown by the solid line in FIG. 3, the operation lever 43c pushes the push-pull cable 43b toward the operation link 43a and locks the securing hook 41 to the locking pin 2a through the operation link 43a and the link mechanism 42. At the rear position indicated by the two-dot chain line in FIG. 3, the push-pull cable 43b is pulled in from the operation link 43a side, and the securing hook 41 is disengaged from the locking pin 2a through the operation link 43a and the link mechanism 42 and locked. Has been made to release.
[0032]
The container C has, for example, an open upper surface as shown in FIG. 1 and a rear wall C2 provided to be openable and closable about a lower end. What can be opened and closed freely so that discharge is possible is used.
[0033]
The container C is provided with the engaging pins C1 at the upper portion of the front wall, the support legs C3 at the front of the bottom surface, and the support rollers C4 at the rear portion of the bottom surface.
[0034]
Here, the inner legal length of the container C is set to, for example, about 1920 to 1940 mm when the container C is mounted on a minicar, so that when the container C is mounted on the vehicle body 1, the rear end of the container C is By projecting from the rear of the vehicle body 1, a long overall length of the container C is secured to increase the loading capacity. Note that the length of the rear end of the container C projecting from the rear of the vehicle body 1 is legally regulated to be less than one-tenth of the total length L of the vehicle (light vehicle) in the present situation, and falls within this range. Although the total length of the container is set as described above, it is only necessary to cope with the case where laws and regulations are relaxed.
[0035]
Further, a roller 11 for smoothly unloading the container C between the vehicle body 1 and the ground is provided at a rear end portion of the vehicle body 1 (sub-frame).
[0036]
Next, the operation of the cargo handling arm securing device of the container cargo handling vehicle configured as described above will be described.
[0037]
First, when unloading the container C from above the vehicle body 1 to the ground, the operation lever 43c is rotated to the rear position while the container C is mounted as shown in FIG. As a result, the operating link 43a rotates backward through the push-pull cable 43b, and the connecting link 42c rotates counterclockwise against the urging force of the spring 45, and the link rod 42a is pushed forward by this action. When the securing hook 41 is separated from the locking pin 2a, the securing between the cargo handling arm 2 and the dump frame 23 is released.
[0038]
In this state, the up-and-down cylinder 3 is extended, and only the cargo handling arm 2 is rotated rearward while the dump frame 23 is kept horizontal, thereby tilting the container C as shown by a two-dot chain line in FIG. Meanwhile, as shown by a two-dot chain line in FIG. The container C on the ground can be loaded on the vehicle body 1 by operating the cargo handling arm 2 in the opposite manner as described above.
[0039]
On the other hand, when discharging the cargo in the container C with the container C being dumped on the vehicle body 1, the operation lever 43c is rotated from the rear position to the front position with the container C mounted as shown in FIG. Deploy. As a result, the operating link 43a pivots forward from the rear through the push-pull cable 43b, and the connecting link 42c pivots clockwise along with this, whereby the link rod 42a moves rearward against the urging force of the spring 45. The cargo handling arm 2 and the dump frame 23 are integrally secured by moving and securing the securing hook 41 to the securing pin 2.
[0040]
Then, in this state, the unloading cylinder 3 is extended and the integrated cargo handling arm 2 and the dump frame 23 are rotated backward, so that the container C is dumped on the vehicle body 1 as shown by a two-dot chain line in FIG. As a state, the cargo in the container C can be discharged through the opened rear wall C2 of the container C.
[0041]
At this time, since the center of the pin 42e is located below the line L, even if an external force acts on the link rod 42a, the securing hook 41 does not separate from the locking pin 2a, and the load handling arm 2 and the dumping arm 2 are dumped. The frame 23 can be stably maintained in the locked state, and the above-described discharging operation can be performed safely.
[0042]
In addition, by operating the operating lever 43c provided on the vehicle body 1 through the push-pull cable 43b to fix and release the cargo handling arm 2 and the dump frame 23, the degree of freedom of the mounting position of the operating lever 43c is improved, The operability of securing and releasing by the operation lever 43c can be improved.
[0043]
【The invention's effect】
As described above, according to the cargo handling arm securing device of the container cargo handling vehicle of the present invention, the cargo handling arm and the dump frame are integrally formed by being locked to the locking member provided on the horizontal portion of the dump frame. A securing member for securing is provided, and one end of the cable member is connected to the securing member via a link mechanism, and the other end of the cable member is connected to an operation lever provided on the vehicle body side. By operating the securing member so as to be detachable from the locking member by the operation described above, the operability of securing and releasing by the operating lever can be improved in combination with the improvement in the degree of freedom of the mounting position of the operating lever.
[0044]
In addition, the cargo handling arm and the dump frame can be stably maintained in a fixed state by the link mechanism, and the discharging operation can be performed safely.
[Brief description of the drawings]
FIG. 1 is a side view showing the entire configuration of a container cargo handling vehicle.
FIG. 2 is an enlarged side view showing a configuration of a cargo handling arm tying device.
FIG. 3 is a plan view showing an arrangement state of a cargo handling arm securing device.
FIG. 4 is a side view showing the operation of the container cargo handling vehicle.
FIG. 5 is a side view showing the operation of the container cargo handling vehicle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Body 2 Cargo handling arm 21 Horizontal part 22 Vertical part 23 Dump frame 3 Undulating cylinder 4 Cargo arm securing member 41 Secured hook (securing member)
42 link mechanism 43 operating mechanism 43c operating lever 43b push-pull cable (cord member)
C container

Claims (2)

A horizontal portion whose rear end is rotatably supported in the front-rear direction via a dump frame on the rear end side of the vehicle body, and a hook which stands upright from the front end of this horizontal portion and which can be detachably engaged with the container at the front end. A cargo handling arm formed substantially in an L-shape as a whole with the vertical portion having the container, and the container is unloaded between the vehicle body and the ground by rotating the cargo handling arm in the front-rear direction by the undulating cylinder. In the container handling vehicle made in
The dump frame is provided with a securing member that is secured to a securing member provided on the horizontal portion and secures the cargo handling arm and the dump frame integrally, and a link mechanism is provided on the securing member. The other end of the cable member is connected to the operation lever provided on the vehicle body side, and the securing member is detachably engaged with the locking member by operating the operation lever. A cargo handling arm securing device for a container cargo handling vehicle, comprising: 2. The link mechanism according to claim 1, wherein the link mechanism acts in a direction for maintaining the securing member in a state of being locked to the locking member, unless the link mechanism is forcibly operated by operating an operation lever. Securing equipment for container handling vehicles.

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