JP5520707B2 - Loading platform, trailer, and rack - Google Patents

Description

  The present invention relates to a loading platform on which a load is placed, a trailer provided with such a loading platform, and a rack.

  2. Description of the Related Art Conventionally, a trailer (cart) used for transporting cargo loaded on an aircraft or the like is known (see Patent Document 1). This type of trailer, called a container dolly, pallet dolly, or the like, includes a loading platform on which containers, cargo pallets, and the like are placed, and is connected to a plurality of vehicles and pulled by a towing vehicle.

  A load such as a container or a pallet placed on the loading platform is pushed and moved while being slid on the loading platform by an operator's hand to be loaded and unloaded on the loading platform. Aviation containers and pallets may have a weight of about 1 ton even if they are light, or 7 tons if heavy. In order to facilitate the movement of such a heavy load on the loading platform, the loading platform is provided with a plurality of rotating bodies such as rollers. The load placed on the loading platform is supported by a roller, and the roller rotates as the load moves, thereby reducing the force required to push the load. Such a loading platform is also used for a rack for temporarily storing and storing containers in a cargo warehouse of a cargo terminal at an airport, for example.

  As a rotating body for facilitating the movement of the load, for example, a rotating body of a type in which casters (wheels) are installed upside down as disclosed in Non-Patent Document 1 may be employed. . This type of rotator is configured to be rotatable about a rotation axis perpendicular to the loading surface and a rotation axis parallel to the loading surface, and the rotation direction can be freely changed in accordance with the moving direction of the load.

  Once the rotating body starts rotating, the load on the load can be reduced by the rotation of the rotating body, and the load can be reduced with a relatively light force. However, when starting to push, that is, when the stationary rotating body is rotated, the load when the load is pushed is increased. Further, in air container transportation having a weight of 1 to 7 tons, the loader surface of the trailer may not be flat due to long-term use, and the container may not move when pushed by one worker.

  In particular, in a trailer equipped with the above-described caster-type rotating body, the moving direction of the load varies between loading and unloading, for example, when loading the load into the loading platform from the front and rear direction and unloading from the side. May be different. In such a case, it is necessary to push the load to some extent until the direction of rotation of the rotating body coincides with the moving direction at the time of unloading from the moving direction at the time of carrying in the load. The effect cannot be obtained. At this time, the load when the load is pushed and moved becomes very large. In some cases, the load cannot be moved unless it is pushed by a plurality of people.

  Therefore, for example, it is conceivable to push and move the load using an auxiliary tool such as a bar. However, since such a tool has a risk of being brought into an aircraft when lost, its use is often restricted as a dangerous article at an airport or the like.

JP 2001-225762 A

“PALLET DOLLY with inverted casters”, [online], [Search June 30, 2009], Internet <URL: http://www.hanaoka-corp.co.jp/download/airport/2-palette-dolly /6-ME1596N-2.pdf>

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a loading platform, a trailer, and a rack with improved workability of loading and unloading work. .

In order to achieve the above object, the carrier in the present invention is:
A loading surface on which the load is placed;
A force is provided on the loading surface so as to come into contact with the lower surface of the load, and when the load is pushed and moved, the force for moving the load by rotating in accordance with the moving direction of the load. A rotating body capable of reducing
In the loading platform having
A guide groove extending along a direction in which the load is pushed and moved on the loading surface;
A slider configured to be movable along the direction in which the load is pushed and moved in the guide groove;
A lever bar pivotally supported by the slider so as to be rotatable around a rotation axis perpendicular to a direction in which the load is pushed and moved;
An abutting portion provided at the groove bottom of the guide groove so as to be able to abut against one end of the lever bar;
With
In the lever bar, the one end abutted on the abutting portion serves as a fulcrum, the other end serves as a force point, and a portion pressed against the load between the one end and the other end serves as an action point. The load can be pushed and moved.

  According to the present invention, it is possible to easily push and move a load using a lever. Since the load can be pushed and moved with a lighter force than when it is pushed directly by human power, the number of workers can be reduced and the work efficiency can be improved. In particular, it is suitable at the beginning of pushing where the greatest force is required when pushing the load. That is, since the rotating body must be rotated from a stationary state, the load when pushing the load increases, but the load can be easily pushed using the lever.

  Further, the lever bar is not assembled as a single tool but is integrally assembled to the cargo bed via a slide portion. Therefore, the risk of loss or the like as a single tool is reduced, and the risk of being brought into the aircraft as a dangerous object is reduced. Therefore, it can be used without any problem even in airports where it is prohibited to bring in a single tool.

  The rotating body may be configured to be rotatable around a rotation axis perpendicular to the loading surface and a rotation axis parallel to the loading surface.

The present invention is particularly suitable when the rotating body that reduces the force for pushing and moving the load is configured to freely change the rotation direction according to the moving direction of the load. The effect of reducing the pushing force of the load by the rotating body is that the direction of the rotating body (the direction perpendicular to the rotation axis parallel to the loading surface and parallel to the loading surface) matches the moving direction of the loading object. To be demonstrated. Therefore, when the load is placed on the loading surface, the direction of the rotating body is different from the direction in which the load is moved, for example, when the load moving direction is different between loading and unloading. It is necessary to push the load to some extent in order to make the direction of the rotating body that matches the moving direction of the moving body coincide with the moving direction at the time of unloading. At this time, the load when the load is pushed is very large, but the load can be easily pushed by using a lever.

  The contact portion may be provided at a plurality of locations along the moving direction of the slider.

  Thus, by providing the contact portions at a plurality of locations, it is possible to use the lever according to the size of the load. In addition, even if the range of movement of the load necessary to bring the rotating body into a rotating state varies depending on the moving direction when loading / unloading the load, etc., because the range in which the lever can be pushed out increases. It becomes possible to respond.

  In order to achieve the above object, a trailer and a rack according to the present invention include the loading platform. According to the present invention, for example, it is possible to improve workability in moving a load from a trailer to a roller conveyor in carrying cargo into an aircraft cargo compartment or moving a load from a rack bed to a trailer bed. Can do.

  As described above, according to the present invention, the workability of the loading / unloading work of the load is improved.

FIG. 1 is a schematic diagram (side view) illustrating the overall configuration of the trailer. FIG. 2 is a schematic diagram (plan view) illustrating the entire configuration of the trailer. FIG. 3 is a schematic diagram (perspective view) illustrating the configuration of the rotating body. FIG. 4 is a schematic diagram illustrating the configuration of the carry-out assisting device. FIG. 5 is a schematic diagram for explaining the operation of the carry-out assisting device. FIG. 6 is a schematic diagram illustrating the configuration of the lever locking device. FIG. 7 is a schematic diagram (perspective view) illustrating the configuration of the guide roller.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be exemplarily described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. .

(Example)
<Overall configuration of trailer>
First, with reference to FIG.1 and FIG.2, the whole structure of the trailer 1 which concerns on the Example of this invention is demonstrated. FIG. 1 is a schematic diagram (side view) illustrating the overall configuration of the trailer 1. FIG. 2 is a schematic diagram (plan view) illustrating the overall configuration of the trailer 1.

  The trailer 1 is called a container dolly, a pallet dolly, or the like, and is a carriage for carrying cargo or the like loaded on an aircraft or the like at an airport or the like. A plurality of trailers 1 are connected and pulled by a towing vehicle (not shown).

As shown in FIG. 1, the trailer 1 generally includes a vehicle body 10 and a loading platform 20 provided on the upper side of the vehicle body 10, and the load 3 is placed on the upper surface of the loading platform 20. The load 3 may be a single cargo such as a container, or may be a form in which a cargo 31 is placed on a pallet 30 as shown in FIG. The load 3 placed on the loading platform 20 is pushed and moved while sliding on the loading platform 20 by human power, and is carried into and out of the loading platform 20 (unloading).

  The vehicle body 10 is a four-wheel vehicle having a front wheel 11 and a rear wheel 12 provided in pairs. A tow bar 13 and a hitch 14 for connecting the towing vehicle (not shown) and the trailers 1 to each other are provided before and after the vehicle body 10. The loading platform 20 includes a rotating body 22, a carry-out assisting device 23, and a guide roller 24 to facilitate movement of the load 3 on the loading surface 21.

  As shown in FIG. 2, the loading surface 21 of the loading platform 20 is a substantially square surface, and a plurality of openings 21 a in which the rotating bodies 22 are accommodated are provided at substantially equal intervals. Also, the carry-out assisting device 23 is provided at a total of three locations, one on the front side in the vehicle front-rear direction on the loading surface 21 and two on both sides of the vehicle on the loading surface 21. The guide rollers 24 are provided at the two corners at the rear end of the stacking surface 21. Although not shown, a stopper or the like for locking the load 3 to the load surface 21 is also provided.

<Rotating body>
The rotating body 22 will be described with reference to FIG. FIG. 3 is a schematic diagram (perspective view) illustrating the configuration of the rotating body 22.

  The rotator 22 is a reverse caster type (reverse wheel type) rotator configured such that the rotation direction can be freely changed in accordance with the moving direction of the load. The rotating body 22 is pivotally supported by a first support member 22a so as to be rotatable around a rotation axis parallel to the stacking surface 21. The first support member 22 a is pivotally supported by a second support member 22 b fixed to the loading platform 2 so as to be rotatable around a rotation axis perpendicular to the loading surface 21.

  The rotating body 22 is assembled so as to come into contact with the lower surface of the load 3 through an opening 21 a provided in the loading surface 21. Further, the rotating body 22 rotates in accordance with the moving direction of the load 3 when the load 3 is pushed and moved to reduce the load when the load 3 is pushed and moved.

  In addition, as a structure of the rotation support part of the rotary body 22 and the rotary body 22, it is not limited to the said caster type. For example, what is called an omni wheel composed of a plurality of rollers, or a steel ball that is rotatably supported may be used.

<Export assist device>
The carry-out assisting device will be described with reference to FIGS. 4A and 4B are schematic views for explaining the configuration of the carry-out assist device. FIG. 4A is a front view of the lever bar and the slider when the lever bar is laid down horizontally, and FIG. (C) is a side view of the lever bar and slider when the lever bar is set up vertically with respect to the slider, and (d) is a side view of the structure of the carry-out assist device. It is a schematic diagram to do. FIG. 5 is a schematic diagram for explaining the operation of the carry-out assisting device. The state in which the rotating body gradually rotates in the moving direction of the load in chronological order (a) to (d). Show. FIG. 6 is a schematic diagram illustrating the configuration of the lever locking device.

  The carry-out assisting device 23 includes a guide groove 23a, a slider 23b, a lever rod 23c, and a contact portion 23d.

The guide groove 23 a is provided so as to extend along the direction in which the load 3 is pushed and moved on the loading surface 21 of the loading platform 20. A guide rail 23e is provided in the guide groove 23a to guide the slider 23b along the direction in which the load 3 is pushed and moved. In addition, abutting portions 23d are provided at a plurality of locations along the direction in which the load 3 is pushed and moved on the groove bottom of the guide groove 23a.

  The slider 23b includes four wheels 23f that can move by rotating in the guide rail 23e, and a shaft portion 23g that rotatably supports the lever rod 23c. The slider 23b is configured to be movable along the direction in which the load 3 is pushed and moved in the guide groove 23a when the wheel 23f moves in the guide rail 23e.

  The lever rod 23c is pivotally supported by the shaft portion 23g of the slider 23b on the one end 23h side. The lever bar 23c rotates around a rotation axis orthogonal to the direction in which the load 3 is pushed and moved. The lever bar 23c is configured such that one end 23h abuts against the abutting portion 23d of the groove bottom of the guide groove 23a by rotating with respect to the slider 23b. A handle 23j is provided at the other end 23i of the lever rod 23c.

  With reference to Fig.5 (a)-FIG.5 (d), operation | movement of the conveyance assistance apparatus 23 is demonstrated. Here, a case where the moving direction of the load 3 is different between loading and unloading will be described as an example. For example, the case where the load 3 carried in from the side of the vehicle is carried out toward the rear of the vehicle, or vice versa, corresponds to this case.

  As shown in FIG. 5A, the direction of the rotating body 22 is a direction perpendicular to the paper surface, whereas the direction in which the load 3 (pallet 30) is pushed and moved is a direction horizontal to the paper surface. Yes. First, the other end 23i side of the lever bar 23c is lifted so that the other end 23i is above the one end 23h, and the angle at which the one end 23h can dive below the pallet 30 without contacting the contact portion 23 ( In this embodiment, the lever bar 23c is tilted to approximately 45 degrees with respect to the loading surface 21. The slider 23b is advanced until the portion 23k between the one end 23h and the other end 23i contacts the edge of the pallet 30 (the rear end of the load 3) while maintaining the lever bar 23c at the angle.

  Next, as shown in FIG. 5 (b), the lever bar 23c is made to stand substantially vertically so that one end 23h is down and the other end 23i is up. At this time, the one end 23h of the lever bar 23c comes into contact with any one of the abutting portions 23d located below the load 3, and the force to lift the other end 23i of the lever bar 23c is caused by the lever principle. It is transmitted to the pallet 30 through the part 23k, and the pallet 30 is pushed and moved. That is, in the lever rod 23c, one end 23h that contacts the contact portion 23d serves as a fulcrum, a portion 23k that contacts the edge of the pallet 30 serves as an action point, and the other end 23i (handle 23j) to which the worker's force is applied serves as a force point. .

  At this time, the rotator 20 changes its direction around the rotation axis perpendicular to the loading surface 21 by the movement of the pallet 30, and the direction of the rotator 20 approaches the moving direction of the pallet 30.

  Hereinafter, as shown in FIGS. 5C and 5D, by repeating the same operation as described above, the direction of the rotating body 20 coincides with the direction in which the pallet 30 moves (FIG. 5D). Thereby, the rotating body 20 starts to rotate in accordance with the moving direction of the pallet 30 and the load when the pallet 30 is pushed and moved is reduced.

  Here, the guide groove 23a is provided with a length equal to or longer than the full length of the lever bar 23c, and accommodates the lever bar 23c by tilting the lever bar 23c horizontally (parallel to the loading surface 21). It is configured to be able to.

As shown in FIG. 6, the lever bar 23 c is configured to be fixed in the accommodated state by the handle 23 j being locked by the lock pin 231 at the end of the loading platform 20. The handle 23j has a cylindrical shape that extends in a direction orthogonal to the lever rod 23c and opens at the end. The handle 23j is locked by fitting a lock pin 23l biased by a spring into the opening. When the lever rod 23c is pushed into the guide groove 23a, the inclined surface provided at the tip of the lock pin 23l gets over the end of the handle 23j, so that the lock pin 23l is automatically fitted into the opening of the handle 23j. Locked. When pulling out the lever bar 23c from the guide groove 23a, the handle 23j can be unlocked by pulling the lock pin 23l against the spring.

<Guide roller>
FIG. 7 is a schematic diagram (perspective view) illustrating the configuration of the guide roller. The guide roller 24 includes a roller 24a that can contact the side surface of the load 3 and a support portion 24b that rotatably supports the roller 24a around a rotation axis that is perpendicular to the stacking surface. The roller 24a is configured to be able to contact the edge of the pallet 30 (side surface of the load 3) even when the pallet 30 is carried in and out in the lateral direction of the vehicle. .

<Excellent points of this embodiment>
According to the present embodiment, the load can be pushed and moved by the conveyance assisting device with a lighter force than in the case where it is pushed and pushed manually by hand. Therefore, it is possible to reduce the number of workers and improve work efficiency in the work of transporting cargo or the like by the trailer.

  In particular, when the load starts to be pushed, the rotating body must be rotated from a stationary state, so that the load when the load is pushed is increased. In addition, as in the present embodiment, when the rotating body is configured so that the rotation direction can be freely changed in accordance with the moving direction of the load, the load is moved between loading and unloading. When the directions are different, it is necessary to push the load to some extent until the direction of the rotating body coincides with the movement direction at the time of unloading from the movement direction at the time of loading. At this time, the load when the load is pushed is very large. In such a case, by using the lever of the conveyance assisting device, the load when pushing the load can be reduced, and the load can be pushed easily.

  Further, according to the present embodiment, the lever bar is not assembled as a single tool but is integrally assembled to the cargo bed via the slider as a conveyance auxiliary device. Therefore, the risk of loss or the like as a single tool is reduced, and the risk of being brought into the aircraft as a dangerous object is reduced. Therefore, it can be used without any problem even in airports where it is prohibited to bring in a single tool.

  Further, according to the present embodiment, since the abutting portions are provided at a plurality of locations, the lever can be used according to the size of the load. In addition, even if the range of movement of the load necessary to bring the rotating body into a rotating state varies depending on the moving direction when loading / unloading the load, etc., because the range in which the lever can be pushed out increases. Can respond.

  Further, according to the present embodiment, since the lever bar can be accommodated in the guide groove, during the operation not using the lever bar, the lever bar is accommodated in the guide groove so that It is possible to prevent work from being hindered, causing injury to workers, accidents, and the like.

  In addition, according to the present embodiment, since the roller guide is provided, it is possible to move the load stably while suppressing the wobbling of the load. That is, when the roller of the roller guide contacts and rotates on the side surface of the load, the load can be stably moved in the direction in which the load should be moved.

  Therefore, according to the present embodiment, the workability of the loading / unloading work of the load can be improved.

<Others>
In the said Example, although it is set as the structure which provided the carrying-out auxiliary | assistance apparatus in three places, it is not restricted to this. For example, when it is used only for forward and backward transport, it may be configured to provide unloading assisting devices only at two locations on both sides of the loading surface in the transport direction. In the case of transport in only one direction The structure which provides a carrying-out auxiliary apparatus only in one place may be sufficient.

  Of course, the carry-out assisting device can be applied to uses other than trailers. That is, the present invention can be suitably applied to a transport device that transports a load by rotating a plurality of rotating bodies, such as a roller conveyor. The loading platform according to the present invention is also suitable as a loading platform for a rack for temporarily storing and storing containers in a cargo warehouse for containers at a cargo terminal at an airport, for example. According to the present invention, for example, it is possible to improve workability when moving a container placed on a rack bed to a trailer bed. It should be noted that trailers and racks are merely examples, and it goes without saying that the present invention can be suitably applied as a loading platform for various devices that need to slide and move a load placed on the loading platform. .

DESCRIPTION OF SYMBOLS 1 Trailer 10 Car body 11 Front wheel 12 Rear wheel 13 Tober 14 Hitch 20 Loading platform 21 Loading surface 22 Rotating body 23 Unloading auxiliary device 24 Guide roller 3 Load 30 Pallet 31 Cargo

Claims (5)

A loading surface on which the load is placed;
A force is provided on the loading surface so as to come into contact with the lower surface of the load, and when the load is pushed and moved, the force for moving the load by rotating in accordance with the moving direction of the load. A rotating body capable of reducing
In the loading platform having
A guide groove extending along a direction in which the load is pushed and moved on the loading surface;
A slider configured to be movable along the direction in which the load is pushed and moved in the guide groove;
A lever bar pivotally supported by the slider so as to be rotatable around a rotation axis perpendicular to a direction in which the load is pushed and moved;
An abutting portion provided at the groove bottom of the guide groove so as to be able to abut against one end of the lever bar;
With
In the lever bar, the one end abutted on the abutting portion serves as a fulcrum, the other end serves as a force point, and a portion pressed against the load between the one end and the other end serves as an action point. The loading platform is configured to push and move the load.   2. The loading platform according to claim 1, wherein the rotating body is configured to be rotatable around a rotation axis perpendicular to the loading surface and a rotation axis parallel to the loading surface.   The loading platform according to claim 1, wherein the contact portion is provided at a plurality of locations along a moving direction of the slider.   The trailer provided with the loading platform in any one of Claims 1-3.   The rack provided with the loading platform in any one of Claims 1-3.

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