JPH0717580Y2 - Container loading / unloading equipment for cargo handling vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a container unloading device for a cargo handling vehicle in which a container is unloadably mounted, and particularly to a guide roller structure for the container.

(Prior Art) Generally, in a container loading / unloading apparatus for a cargo handling vehicle of this type, a substantially L-shaped cargo handling frame is mounted on a chassis as disclosed in Japanese Patent Publication No. 62-29261. The cargo handling frame is configured such that a cargo handling arm is pivotally supported on a rear frame pivotally supported by the chassis, and the cargo handling arm is configured such that a substantially L-shaped front frame is slidably inserted into an intermediate frame, There is a structure in which a hook is provided at the tip of the front frame.

When dumping the container mounted on the chassis, the entire cargo handling frame is tilted with respect to the chassis, while when loading and unloading the container, only the cargo handling arm is undulated with respect to the chassis. There is.

(Problems to be Solved by the Invention) In the container unloading apparatus for a cargo handling vehicle described above, a pair of guide rollers is provided at the rear end of the chassis, and the guide rollers are used when unloading the containers. The main girders of the are in contact with each other to guide the container. An inner flange is formed on the inner edge of the guide roller on the center side of the chassis, and when the moving direction of the container is deviated, the main girder is brought into contact with the inner flange to correct the moving direction.

However, in the above guide roller, when the container is tilted to the side (see the chain line in FIG. 5), only one main girder comes into contact with the guide roller and moves outward (in the X direction). Since there is no stopper at all, the container may derail from the guide roller, and it may be impossible to unload and load the container, particularly to the chassis.

The present invention has been made in view of the above circumstances, and an object thereof is to make it possible to surely correct the moving direction of a container and to surely prevent derailment.

(Means for Solving the Problem) In order to achieve the above object, the means taken by the present invention is to form flanges at both ends of the guide roller.

Specifically, the measures taken by the device according to claim 1 are as follows.
It is premised on a container loading / unloading device of a cargo handling vehicle in which a cargo handling arm is provided on a chassis so as to be capable of undulating, and the cargo handling arm is undulated to unload a container.

A pair of main girders provided on the lower surface of the container are in contact with the rear end of the chassis to guide a pair of guide rollers, which are rotatably cantilevered inside the chassis center of each guide roller. It is supported.

Further, an inner flange is formed on the inner edge of the guide roller on the side of the chassis center, and an outer flange is formed on the outer edge of the outside of the chassis.

In addition, in both of the guide rollers, a gap between outer end distances of both main girders of the container and a distance between the outer flanges is equal to an inner end distance of both main girders of the container and a distance between the inner flanges. The gap is larger than the gap.

Further, the means taken by the device according to claim 2 is the device according to claim 1, wherein the opposed surfaces of the inner flange and the outer flange are formed into tapered surfaces which are inclined in a direction away from each other toward the centrifugal direction. It is configured.

The means taken by the device according to claim 3 is the device according to claim 1 or 2, wherein the outer diameter of the inner flange is larger than the outer diameter of the outer flange.

(Operation) With the above configuration, in the device according to the first aspect, the cargo handling arm is undulated with respect to the chassis to load and unload the container. For example, when loading a container installed on the ground, Raise the cargo handling arm and rotate it backward, engage the hook at the tip of the cargo handling arm with the engagement pin of the container,
Rotate the loading arm forward and pull the container up to the chassis. When unloading the container on the chassis, the container is unloaded by rotating the loading arm rearward.

At the time of loading and unloading of the container, the main girder of the container contacts the guide roller, and the container is guided by the guide roller. Then, the container moves in the front-rear direction of the chassis, but when the moving direction deviates laterally, one main girder contacts the inner flange and the moving direction is corrected.

Particularly, in the invention according to claim 2, since the inner flange has the tapered surface, the correction of the moving direction is smoothly performed. Further, in the invention according to claim 3, the inner flange has a large diameter. Therefore, riding on the outer flange is reliably prevented.

On the other hand, when the container tilts to the side and moves to the side, one of the main girders comes into contact with the outer flange and the lateral movement is restricted. In particular, in the device according to the second aspect, since the outer flange is formed with the tapered surface, the lateral movement is restricted, and at the same time, the moving direction is corrected and the wheel slippage is prevented.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

As shown in FIG. 1, reference numeral 1 denotes a cargo handling vehicle for loading and unloading a container 12 on a chassis 11 for transportation.
The cargo handling frame 2 is mounted on 11.

The cargo handling frame 2 is, as shown in FIGS. 2 to 4,
The cargo handling arm 22 is connected to the rear frame 21, and the cargo handling arm 22 is configured by inserting the front frame 24 into the intermediate frame 23. The cargo handling frame 2 is arranged in the center of the chassis 11 in the front-rear direction of the chassis. It is set up. The rear frame 21 is formed by arranging a pair of flat plates in parallel, and the rear end portion is connected to the chassis 11 by a rear pivot 25, and the rear frame 21 is the chassis frame.
It is rotatably supported in 11 longitudinal directions. Further, the intermediate frame 23 is formed in a cylindrical body, the rear end portion is connected to the front end portion of the rear frame 21 by an intermediate pivot shaft 26, the cargo handling arm 22 is the chassis 11 and the rear frame.
It is rotatably supported in the front-rear direction of the chassis 11 with respect to 21.

The front frame 24 has a horizontal portion 24a and a vertical portion 24b, and is substantially L-shaped.
The horizontal portion 24a is slidably inserted into the intermediate frame 23 from the front opening so that the cargo handling arm 22
Is configured to be expandable and contractible, and the horizontal portion 24a and the intermediate frame
The horizontal frame portion of the cargo handling arm 22 is constituted by 3 and the vertical frame portion of the cargo handling arm 22 is constituted by the vertical portion 24b. A hook 27 is attached to the upper end of the vertical portion 24b which is the tip of the front frame 24, and the hook 27 opens forward and engages and disengages with the engagement pin 13 attached to the front surface of the container 12. It is formed freely.

Further, a lock member 28 is provided on the rear end surface side of the cargo handling arm 22. The lock member 28 is provided with a metal fitting (not shown) at the bottom of the container 12 and an intermediate frame when the container 12 is dumped.
23 and 23 are locked, and the lock is released when the containers 12 are unloaded.

A lift cylinder 3 is connected between the intermediate frame 23 and the chassis 11, and a slide cylinder 4 is connected between the intermediate frame 23 and the horizontal portion 24a of the front frame 24. The cylinders 3 and 4 are configured to tilt the cargo handling frame 2 and raise and lower the cargo handling arm 22. That is, when the slide cylinder 4 is extended, the cargo handling arm 22 is most extended, and the lift cylinder 3 is extended, the entire cargo handling frame 2 is tilted around the rear pivot 25 (see FIG. 4A), while the lock member is locked. When the slide cylinder 4 is contracted, the cargo handling arm 22 is contracted, and the lift cylinder 3 is contracted and expanded in a state where the lock of 28 is released, the cargo handling frame 2 is bent between the intermediate frame 23 and the rear frame 21. Only the loading arm 22 has the intermediate pivot 26
It is configured to undulate around (see FIG. 4B).

At the rear end of the chassis 11, a pair of guide rollers 5a, 5b, which is a feature of the present invention, is provided. Both guide rollers 5
a and 5b are rear pivots that connect the rear frame 21 to the chassis 11.
The guide rollers 5a, 5b are rotatably fitted and attached to both side ends of 25, and both guide rollers 5a, 5b are cantilevered by a chassis 11. The right guide roller 5a and the left guide roller 5b are formed symmetrically, and a pair of main girders 14, 14 formed on the lower surface of the container 12 and extending in the front-rear direction are provided in contact with each other.

As shown in FIGS. 5 and 6, each of the guide rollers 5a and 5b is formed by forming an inner flange 52 and an outer flange 53 on both side edges of a cylindrical roller body 51. That is,
In both of the guide rollers 5a, 5b, an inner flange 52 is formed on the inner edge located on the center side of the chassis 11, and an outer flange 53 is formed on the outer edge located on the outside of the chassis.

Further, the outer diameter of the inner flange 52 is formed to be larger than the outer diameter of the outer flange 53, while the facing surfaces of the both flanges 52, 53 are tapered surfaces 54, 55 which are inclined toward the centrifugal direction and away from each other. Is formed in.

As shown in FIG. 5, the guide rollers 5a and 5b have an inner end distance l ₁ between the inner flanges 52 and 52 which is slightly smaller than an inner end distance l ₂ between the main girders 14 and 14 and which has a predetermined inner diameter. An end gap (l ₂ −l ₁ ) is formed, and an outer end distance l ₄ between the outer flanges 53, 53 is slightly larger than an outer end distance l ₃ of both main girders 14, 14 and a predetermined outer end. At the same time as the gap (l ₄ −l ₃ ) is formed, the outer end gap (l ₄ −l ₃ ) is formed larger than the inner end gap (l ₂ −l ₁ ) and the following equation is satisfied. Is configured.

(L ₂ −l ₁ ) <(l ₄ −l ₃ ) ... That is, when the container 12 is unloaded, if the moving direction of the container 12 is displaced laterally, first, the main girder 14 is attached to the inner flange 52. The container 12
When the left main girder 14 floats and the container 12 moves to the right side (X direction), the left main girder 14 does not contact the inner flange 52 of the left guide roller 5b.
14 is configured to contact the outer flange 53 of the right guide roller 5a.

Then, where the above formula is satisfied, each of the guide rollers 5a, 5b is cantilevered on the inner flange 52, 52 side, and the supporting strength on the inner flange 52, 52 side, for example, the bending force. Since the inner flange 52, 52 side is stronger than
It is set so that the main girders 14 come into contact with each other more frequently.

Next, a cargo handling operation in the cargo handling vehicle 1 will be described.

First, with the container 12 loaded,
When dumping 12, the dump switch (not shown) is operated to extend the lift cylinder 3 and the lock member
When the metal fittings of the container 12 and the intermediate frame 23 are locked at 28, the entire cargo handling frame 2 tilts about the rear pivot 25, and the container 12 tilts backward as shown in FIG. 4A. When the dump switch is operated to contract the lift cylinder 3, the cargo handling frame 2 falls and returns to the traveling posture (see FIG. 4C).

In addition, when unloading the container 12 and unloading from the chassis 11, if a detachment switch (not shown) is operated, the slide cylinder 4 contracts and the horizontal portion 24a of the front frame 24 moves to the intermediate frame 23. When the container 12 is retracted, the cargo handling arm 22 is in the most contracted state (see FIG. 4D), and the container 12
Moves slightly backward.

When the cargo handling arm 22 contracts to the maximum extent, the lift cylinder 3 subsequently extends, the cargo handling frame 2 bends between the rear frame 21 and the intermediate frame 23, and only the cargo handling arm 22 rotates about the intermediate pivot shaft 26. Stand up. By the rotation of the cargo handling arm 22, the container 12 is unloaded on the ground, and when the cargo handling arm 22 reaches the maximum pivoting posture (see FIG. 4B), the container 12 is placed on the ground.

After that, when loading the container 12 on the ground, the operation is carried out in the reverse of the above-mentioned unloading operation, and the detachment switch is operated from the state of the maximum swinging posture of the loading arm 22 (FIG. 4B) to lift the lift cylinder. When 3 is contracted, the cargo handling arm 22 pivots forward and the container 12 is pulled up on the chassis 11. Then, when the cargo handling arm 22 is laid down (FIG. 4D), the slide cylinder 4 is extended, the cargo handling arm 22 is extended to the traveling posture (FIG. 4C), and the container 12 is fixed to the chassis 11.

When loading / unloading the container 12 and rotating the cargo handling arm 22, the container 12 tilts forward and moves in the front-rear direction of the chassis 11, and at that time, both main girders 14, 14 of the container 12 are guided by both guides. The guide rollers 5a and 5b are in contact with the rollers 5a and 5b.
Will be guided to.

Then, when the container 12 is moved, the moving direction may shift and may be displaced laterally. In particular, car body 11
If the container 12 shifts to the side when loading
Since both guide rollers 5a and 5b are set so as to satisfy the formula, first, one main girder 14 is set to one guide roller.
The moving direction is corrected by contacting the inner flange 52 of 5a or 5b. Moreover, since the tapered surface 54 is formed on the inner flange 52, the moving direction is corrected along the tapered surface 54.

Further, as shown in FIG. 5, when the container 12 tilts, for example, tilts to the right side, and the main girder 14 on the left side floats from the left guide roller 5b, the container 12 moves to the right side (X direction) as it is. That is, the left main girder 14 is displaced without coming into contact with the inner flange 52 of the left guide roller 5b. At this time, the right main girder 14 contacts the outer flange 53 of the right guide roller 5a to restrict the lateral movement of the container 12, and at the same time, the taper surface 55 of the outer flange 53 corrects the movement direction.

Therefore, the moving direction of the container 12 is mainly corrected by the inner flange 52, while the outer flange 53 prevents the wheel from slipping off. As a result, the containers 12 can be smoothly loaded and unloaded. Further, the contact frequency of the main girder 14 is such that the inner flange 52 is increased, and both guide rollers 5a, 5b are cantilevered on the inner flange 52 side, so that they are robust against bending force and the like, The life can be extended.

Although the outer diameter of the inner flange 52 is larger than the outer diameter of the outer flange 53 in the present embodiment, they may have the same outer diameter in the inventions according to claims 1 and 2.

Further, although the cargo handling arm 22 is expanded and contracted, the front frame 24 may be rotated with respect to the intermediate frame 23, and the structure of the cargo handling frame 2 is not limited to the embodiment.

(Effects of the Invention) As described above, according to the invention of claim 1, the inner flange and the outer flange are formed on both side edges of the guide roller, and the gap on the inner flange side with respect to the main girder of the container is reduced. Because of the formation, if the moving direction of the container at the time of loading and unloading shifts, the main girder comes into contact with the inner flange and the moving direction is surely corrected. Further, when the container tilts and moves laterally, the main girder abuts the outer flange, the lateral movement is reliably regulated, and derailment or the like is prevented. As a result, loading and unloading of the container can be performed smoothly and safely, and the loading and unloading of the container can be performed even in an uneven place.

Further, in the device according to the second aspect, since the tapered surface is formed on each flange, the moving direction of the container can be corrected more smoothly.

Further, in the device according to the third aspect, since the inner flange has a large diameter, it is possible to reliably prevent the container from riding on the inner flange having a high locking frequency.

[Brief description of drawings]

1 shows a side view of a cargo handling vehicle, FIG. 2 is a side view of a cargo handling frame, FIG. 3 is a plan view of the same, and FIG. 4 is a side view showing an operating state thereof. is there. FIG. 5 is a rear view of the chassis showing the guide rollers, and FIG. 6 is an enlarged front view of the guide rollers. 1 …… Cargo handling vehicle, 2 …… Cargo handling frame, 5a, 5b …… Guide roller, 11 …… Car chassis, 12 …… Container, 14 …… Main girder, 22 …… Cargo arm, 51 …… Roller body, 52… … Inner flange, 53 ……
Outer flange, 54, 55 ... Tapered surface.

Claims (3)

[Scope of utility model registration request] 1. A cargo handling arm is provided on a chassis so that it can be undulated.
In a container unloading apparatus for a unloading vehicle that undulates the unloading arm to unload the container, a pair of main girders provided on the lower surface of the container come into contact with the rear end of the chassis to guide the container. Of the guide rollers are rotatably cantilevered inside the chassis center side of each guide roller, and an inner flange is formed on the inside edge of the guide rollers on the chassis center side and an outer flange is formed on the outside edge of the chassis. The guide rollers are formed such that a gap between outer end distances of both main girders of the container and a distance between the outer flanges is equal to an inner end distance of both main girders of the container and a distance between the inner flanges. A container unloading device for a cargo handling vehicle, wherein the container unloading device is formed so as to be larger than the gap. 2. The container unloading device for a cargo handling vehicle according to claim 1, wherein the inner flange and the outer flange have opposed surfaces that are formed as tapered surfaces that are inclined in directions away from each other toward the centrifugal direction. Container loading and unloading equipment for cargo handling vehicles. 3. The container unloading device for a cargo handling vehicle according to claim 1, wherein the outer diameter of the inner flange is larger than the outer diameter of the outer flange. .