JP7417315B1 - Truck platform mechanism - Google Patents

Abstract

[Problem] A loading platform for a truck equipped with a loading platform movement and tilting mechanism, which reduces the labor of an operator when loading and unloading cargo to be transported onto the loading platform, and reduces wind resistance during travel. Provide a mechanism. [Solution] A loading platform mechanism for a freight vehicle is provided with a loading platform moving and tilting mechanism, and includes a loading platform 22 equipped with a floor section 21, a hinge 40 provided at the rear end of the floor section 21, and The rear end slope 30 of the loading platform is connected to the rear end of the floor 21, and the locking mechanism 40 removably fixes the rear end slope of the loading platform to the guide rail 10. 10 and the loading platform 20 are arranged on the chassis 3 and are in a state where they can run parallel to the chassis 3, when the loading platform rear end slope 30 is laid down horizontally to the loading platform 20 and the guide rail 10 is placed. Fixed and locked. [Selection diagram] Figure 1

Description

Application of Article 30, Paragraph 2 of the Patent Act Hanamidai Jidosha Co., Ltd., JAF (Japan Automobile Federation), Needs Co., Ltd., Karatsu Wrecker Co., Ltd., Emergency Wrecker Team Co., Ltd., Sato Jidosha Wrecker Co., Ltd., and Kanagawa Wrecker Service Co., Ltd. disclosed a truck (Safety Loader Glide 4) equipped with a "truck truck platform mechanism" invented by Mikiya Nojo for the purpose of sale using a catalog listing the truck. .

TECHNICAL FIELD The present invention relates to a cargo platform mechanism for a freight vehicle equipped with a platform moving and tilting mechanism.

By law, a vehicle exclusively for transporting automobiles can only carry automobiles, so if you want to transport bumpers, tires, etc. related to the automobile along with the automobile, you must use a separate freight vehicle that is not exclusively for carrying automobiles (e.g. , general cargo type/lorry). In addition, since the loading platform of a dedicated vehicle is allowed to be up to 2/3 of the wheelbase, there is a risk of hitting the rear part of the loading platform when driving in urban areas, so careful driving is required. This places a heavy burden on drivers.

For this reason, in recent years, vehicles such as automobiles have been transported using general cargo type trucks that are equipped with a platform moving and tilting mechanism that tilts the platform while moving it backwards. General cargo type/lorry vehicles equipped with this loading platform movement and tilting mechanism can carry a vehicle and its related parts (tires, bumpers, etc.) on the loading platform, and can also be used for purposes other than transporting the vehicle. It has the advantage of being usable for other purposes. In addition, since the loading platform of these general freight vehicles is only allowed to be up to 1/2 of the wheelbase, they are easier to drive than dedicated vehicles and can reduce the driver's workload. can.

When loading a vehicle onto a freight vehicle equipped with a rear gate, the rear end of the loading platform is placed on the ground by the loading platform moving and tilting mechanism (setting the loading platform in a position where it can be loaded and unloaded). After that, the operator releases the gate lock mechanism of the loading platform, rotates the upright rear gate, and brings the tip (free end) of the rear gate into contact with the ground. As a result, an uphill path is formed that is continuously connected from the ground through the loading platform and rear gate. A worker can drive a ground transportation vehicle, drive it through the above-mentioned uphill road, and load the transportation vehicle onto the loading platform.
After the vehicle is loaded onto the cargo platform, the tip of the rear gate is lifted up and rotated to the upright position, which is then fixed with a locking mechanism, and the cargo platform drive means is used to move the cargo platform forward and tilt it into a tilted position. Move the base forward to return to a horizontal position.

Although it is not a type for transporting vehicles, for example, Patent Document 1 discloses a configuration in which a general cargo type truck is provided with a loading platform moving and tilting mechanism.
Specifically, the freight vehicle described in Patent Document 1 includes a tilting base that is provided so as to be able to tilt backward using the rear end of the vehicle body as a fulcrum, and a tilting base that is mounted on the tilting base and that is attached to the tilting base. It is installed so that it can be slid back and forth from a horizontal position where it can carry multiple loads in plan view, to a loading/unloading position where the tilting base is tilted backwards due to its own weight when it approaches the rear end beyond the rear end, and the rear end is in contact with the ground. The loading platform includes a sliding loading platform (hereinafter referred to as a loading platform), and loading platform driving means that can slide the loading platform in the front and rear directions with respect to a tilting base.

Utility model registration number 3186284

However, when the above-mentioned prior art general cargo type/lorry is running, the rectangular/plate-shaped rear gate is fixed in a substantially vertical position relative to the horizontal loading platform. In some cases, the rear gate is subject to wind resistance, resulting in a problem of deterioration of fuel efficiency.
In addition, in the above-mentioned prior art general cargo type/lorry, each time a worker loads or unloads cargo such as a vehicle onto the cargo platform, the worker operates the locking mechanism of the cargo platform to switch the lock state or switch the rear gate. This also poses the problem of placing a labor burden on the workers, since the work involves knocking down and setting up the equipment.

In actual vehicle transportation practice, when a vehicle with a long overall length is loaded onto a loading platform and transported, the rear gate is sometimes fixed in a tilted position to the rear (by law, the rear gate is (It is permitted to drive with the vehicle tilted at an angle of 1/10 of the vehicle's total length.) In such cases, the bumper of the vehicle being transported may be placed near the rear gate that is fixed in a tilted position, and the locking mechanism may become loose and damage the bumper. ing.
In addition, general cargo type/lorry vehicles equipped with the prior art rear gate described above must be equipped with a locking mechanism that can securely fix the rear gate in an approximately vertical position relative to the horizontal loading platform. This is causing an increase in production costs and costs.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a loading platform mechanism for a freight vehicle equipped with a loading platform movement and tilting mechanism, and to provide a loading platform for an operator when loading and unloading cargo to be transported onto the loading platform. To provide a loading platform mechanism that reduces labor and wind resistance during traveling.

The present invention, which was made to solve the above problems, moves the loading platform in the front and back direction along guide rails provided on the chassis to tilt the loading platform or to arrange the loading platform in a horizontal state on the chassis. A loading platform mechanism for a freight vehicle equipped with a loading platform moving and tilting mechanism, the loading platform having a floor section on which cargo is placed, a hinge provided at the rear end of the floor section, and a loading platform provided with a floor section on which cargo is placed; A rear end slope of the loading platform connected to the rear end of the floor, and a locking mechanism for removably fixing the rear end slope of the loading platform to the guide rail, the locking mechanism being connected to the guide rail and the rear end slope of the loading platform. When the loading platform is arranged on the chassis and is in a state where it can run parallel to the chassis, the rear end slope of the loading platform is fixed to the guide rail in a state where it lies down substantially horizontally with respect to the loading platform. In addition, by moving the loading platform forward and backward using the loading platform moving and tilting mechanism, the slope at the rear end of the loading platform can be locked or unlocked. It is characterized by

As described above, in the loading platform mechanism of the present invention, when the guide rail and loading platform are arranged on the chassis and are in a state where they can run parallel to the chassis, the locking mechanism keeps the slope at the rear end of the loading platform approximately parallel to the loading platform. It is designed to be fixed and locked to the guide rail when it is lying down. Therefore, in a truck equipped with the loading platform mechanism of the present invention, unlike a conventional truck equipped with a rear gate fixed vertically to the loading platform, when the truck is traveling, The slope at the rear of the loading platform does not receive strong wind resistance.
In other words, if the loading platform mechanism of the present invention is installed on a freight vehicle, the problem of wind resistance even when the vehicle is unloaded does not occur, unlike the conventional freight vehicle equipped with a rear gate. Fuel efficiency can be improved compared to conventional freight vehicles equipped with rear gates.

Further, the locking mechanism of the loading platform mechanism of a truck according to the present invention locks or releases the slope at the rear end of the loading platform by moving the loading platform forward and backward using the loading platform moving and tilting mechanism. There is. That is, according to the configuration of the present invention, by moving the loading platform back and forth using the loading platform moving and tilting mechanism, the loading platform rear end slope can be automatically switched between the locked state and the unlocked state. Therefore, according to the present invention, unlike the rear gate (or rear gate) of the prior art, "when loading and unloading cargo such as vehicles on the loading platform, the operator operates the locking mechanism of the loading platform each time. The work of locking and unlocking the rear gate (or rear gate) is no longer necessary, and the labor burden on the operator is greatly reduced.

Further, in the loading platform mechanism of the present invention, when the loading platform is in a travelable state, the rear end slope of the loading platform is locked in a state where it lies down substantially horizontally with respect to the loading platform. Therefore, for example, even when transporting a car (vehicle) with a long overall length on a loading platform, the bumper of the vehicle being transported will not be damaged, unlike a freight car equipped with a rear gate. .
In addition, in the loading platform mechanism of the present invention, the locking mechanism is configured to fix and lock the rear end slope of the loading platform to the guide rail in a state in which it lies down approximately horizontally with respect to the loading platform. Compared to a rear gate that is vertically installed and fixed, a locking mechanism with a simpler structure can be used, making it possible to reduce weight and cost.

Further, when the loading platform is moved rearward and tilted by the loading platform moving and tilting mechanism so that the rear end of the bottom surface of the loading platform is in contact with the ground, the loading platform is automatically connected to the rear end of the loading platform. It is desirable that the slope at the rear end of the loading platform forms a tapered surface with an upward slope that bridges the loading platform and the ground.

According to this configuration, like the conventional "freight vehicle equipped with a rear gate," a worker operates to fold down the rear gate (manually or mechanically), and the rear gate is bridged between the loading platform and the ground. There is no need to form a tapered surface, which reduces the labor of the operator.

Further, the locking mechanism includes a tongue piece protruding in a substantially tongue shape provided on the rear side of the guide rail, and a tongue piece provided on the back side of the rear end slope of the loading platform, the tongue piece being removably inserted and fitted. and a receiving part of the rear end slope of the loading platform, and when the tongue piece part of the guide rail is inserted into the receiving part of the rear end slope of the loading platform and the rear end slope of the loading platform is fixed and locked to the guide rail. By moving the loading platform rearward using the loading platform moving and tilting mechanism, the receiving part of the rear end slope of the loading platform is separated from the tongue part and the lock is released, and the rear end slope of the loading platform is not fixed to the guide rail. When the loading platform is moved forward by the loading platform moving and tilting mechanism, the tongue part of the guide rail is inserted into the receiving part of the slope at the rear end of the loading platform, and the slope at the rear end of the loading platform is locked to the guide rail. It is desirable that the

As described above, the locking mechanism of the present invention has a configuration that has a tongue piece provided on the rear side of the guide rail and a receiving part provided on the back side of the slope at the rear end of the loading platform. Compared to the locking mechanism of a rear gate, which is installed vertically and fixed, it has a simpler structure, making it possible to reduce weight and cost.

Further, it is preferable that the loading platform is not provided with side tilts on both left and right sides, and that a grounding roller is provided on the bottom surface of the rear end.
In this way, in the present invention, since the grounding roller is provided on the rear end side and bottom surface of the loading platform, when the rear end of the loading platform is lowered to the ground, the grounding roller does not touch the ground GL. , the loading platform and the rear end slope 30 can be moved smoothly on the ground.
Furthermore, since the loading platform is not provided with side tilts on either side, it is also possible to load and transport vehicles with long width dimensions on the loading platform.

According to the present invention, there is provided a loading platform mechanism for a truck equipped with a loading platform moving and tilting mechanism, which reduces the labor of an operator when loading and unloading cargo to be transported onto the loading platform, and reduces wind resistance during traveling. It is possible to provide a loading platform mechanism that reduces the load.

1 is a schematic diagram showing a truck equipped with a loading platform moving and tilting mechanism and a loading platform mechanism according to an embodiment of the present invention, in which the entire loading platform is lowered from the chassis to the ground by the loading platform moving and tilting mechanism and is tilted; It is a schematic diagram which showed the state where the rear end slope spans the loading platform and the ground. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing a state in which a truck equipped with a loading platform moving and tilting mechanism and a loading platform mechanism according to an embodiment of the present invention has a loading platform and a slope at the rear end of the loading platform placed on a chassis in a horizontal state; It is a schematic diagram which showed the side surface of the rear end side, and (b) is a schematic diagram which showed the rear surface of a freight vehicle. It is a schematic plan view of a loading platform, a hinge, and a rear end slope of the loading platform that constitute the loading platform mechanism of the embodiment of the present invention. It is a schematic diagram for explaining the locking mechanism which constitutes the loading platform mechanism of the embodiment of the present invention, and (a) is a receiving part of the rear end slope of the loading platform on the tongue piece part of the rear end of the guide rail of the truck. It is a schematic diagram showing a state in which the lock is released before being inserted and fitted, and (b) is a schematic diagram showing the state in which the receiving part of the slope at the rear end of the loading platform is inserted into the tongue part of the rear end of the guide rail of the freight vehicle. FIG. FIG. 2 is a schematic diagram showing the configuration of a tongue piece part that constitutes a locking mechanism provided on the rear side of a guide rail of a freight vehicle according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing the configuration of a receiving part that constitutes a locking mechanism provided on the back side of the slope at the rear end of the loading platform of the freight vehicle according to the embodiment of the present invention. It is a schematic diagram showing a truck equipped with a loading platform moving and tilting mechanism and a loading platform mechanism according to a modified example of the embodiment of the present invention, with a part of the loading platform being lowered from the chassis to the ground and tilted by the loading platform moving and tilting mechanism. FIG. 3 is a schematic diagram showing a state in which the loading platform is placed in a state where the rear end slope of the loading platform spans the loading platform and the ground.

EMBODIMENT OF THE INVENTION Hereinafter, the loading platform mechanism of the truck of embodiment of this invention is demonstrated based on drawing.
The loading platform mechanism of this embodiment is mounted on a general cargo type truck equipped with a loading platform moving and tilting mechanism, and is capable of transporting cargo other than automobiles.

In addition, the freight vehicle W of the present embodiment has a loading platform equipped with a loading platform 20, a hinge 40 provided at the rear end of the loading platform 20, a rear end slope 30 of the loading platform, and a locking mechanism 50 for the rear end slope 30 of the loading platform. The structure of the "mechanism" is unique, and the rest of the structure is the same as the conventional one. Therefore, below, the above-mentioned features will be explained in detail, and other configurations will be omitted or simplified.

《Overall configuration of freight vehicle》
First, the overall configuration of the freight vehicle W of this embodiment will be explained with reference to FIGS. 1 to 3.
Here, FIG. 1 is a schematic diagram showing a truck equipped with a loading platform moving and tilting mechanism and a loading platform mechanism according to the present embodiment, and a state in which the entire loading platform is lowered from the chassis to the ground and tilted by the loading platform moving and tilting mechanism. FIG. 3 is a schematic diagram showing a state in which the loading platform is placed in a state where the rear end slope of the loading platform spans the loading platform and the ground. FIG. 2 is a schematic diagram showing a state in which a truck equipped with the loading platform moving and tilting mechanism and loading platform mechanism of the present embodiment has the loading platform and the rear end slope of the loading platform placed on the chassis in a horizontal state; It is a schematic diagram which showed the side surface of the rear end side of a lorry, and (b) is a schematic diagram which showed the rear surface of a lorry. Moreover, FIG. 3 is a schematic plan view of a loading platform, a hinge, and a slope at the rear end of the loading platform that constitute the loading platform mechanism of this embodiment.

As shown in FIG. 1, the freight vehicle W of this embodiment has a cabin 1 and a chassis 3 connected to the cabin 1 and extending in the vehicle longitudinal direction (X direction), and a cargo platform moving and tilting mechanism. It is also equipped with a loading platform mechanism.

The loading platform moving and tilting mechanism is capable of moving the loading platform 20 in the front and back direction along guide rails 10 provided on the chassis 3, and allows the loading platform 20 to be moved backward and tilted (Fig. 1 (the state shown in FIG. 2), or the loading platform 20 is placed horizontally on the chassis 3 (the state shown in FIG. 2).

Specifically, the loading platform moving and tilting mechanism includes a pair of guide rails (hereinafter simply referred to as "rails") 10 supported by a tilting base shaft 5 at the rear of the chassis 3. This rail 10 slidably supports a loading platform 20, so that the loading platform 20 can reciprocate along the rail 10 in the longitudinal direction (X direction) of the vehicle. The loading platform moving and tilting mechanism also includes support legs 13 formed at the rear of the rail 10 and projecting downward, and a slide cylinder (not shown) that reciprocates the loading platform 20 in the longitudinal direction of the vehicle along the rail 10. ing. Note that, for example, a hydraulic cylinder can be used as the slide cylinder.

Further, the inclined base shaft 5 that supports the rail 10 is fixed perpendicularly to the longitudinal direction of the rail 10 between the frames at the rear end of the chassis 3. An engaging portion is formed at the bottom of the rail 10 at a position corresponding to the inclined base shaft 5. The inclined base shaft 5 is inserted into this engaging portion, and the rail 10 is rotatably supported by the chassis 3. has been done.

In addition, in a state where the rail 10 and the loading platform 20 are placed horizontally (parallel to the chassis 3) on the chassis 3 as shown in FIG. When moving the cargo platform 20 rearward and tilting it, the slide cylinder of the cargo platform moving and tilting mechanism is extended to apply a load to the cargo platform 20 on the vehicle/rear side. Thereby, the loading platform 20 moves horizontally backward along the rail 10. In addition, since the rail 10 itself is connected to the inclined base shaft 5, it does not move in the horizontal direction.

Then, when the loading platform 20 moves backward to a certain extent, the rail 10 tilts rearward due to the weight of the loading platform 20 itself (or the combined weight of the loading platform 2 and the cargo), and while the loading platform 20 tilts together with the rail 10, Move backward along the rail 10. That is, when the moment applied backward from the tilt base axis 5 becomes a constant value, the loading platform 20 moves rearward while tilting, and most of the loading platform 20 is lowered to the ground GL and tilted. (the state shown in FIG. 1). Note that the platform rear end slope 30 connected to the rear end of the platform 20 is also lowered to the ground GL together with the platform 20.
Note that the backward movement and tilting operation are completed, for example, by stopping the slide cylinder at the timing when the support leg 13 touches the ground GL.

In addition, when returning the loading platform 20 from the inclined state (the state shown in FIG. 1) to the horizontal traveling state (the state shown in FIG. , and perform the operation opposite to the above. In addition, the loading platform rear end slope 30 connected to the rear end of the loading platform 20 is also returned to the top of the chassis 3 in a parallel state together with the loading platform 20.
In this embodiment, as an example, the loading platform moving and tilting mechanism is of a type that tilts the rail 10 and loading platform 20 by the weight of the loading platform 20 itself (or the combined weight of the loading platform 20 and the cargo) (for example, the mechanism disclosed in Patent No. 3172130 and Japanese Patent No. 3361734), but the present invention is not particularly limited thereto. The loading platform moving and tilting mechanism may have any configuration as long as it moves the loading platform 20 rearward and tilting it. and a locking mechanism 50).

《Loading platform mechanism》
Next, the loading platform mechanism of this embodiment will be explained.
As shown in FIGS. 1 to 3, the loading platform mechanism of this embodiment includes a loading platform 20 including a floor section 21 on which cargo is placed, a hinge 40 provided at the rear end of the floor section 21, and a hinge 40 provided at the rear end of the floor section 21. A loading platform rear end slope 30 is rotatably connected to the rear end of the floor section 21 via a locking mechanism 50 (see FIG. 4) that detachably fixes the loading platform rear end slope 30 to the guide rail 10. ).

The loading platform 20 has a rectangular floor section 21 in plan view on which cargo such as a vehicle (automobile) is placed, and a floor section 21 that is perpendicular to the floor section 21 upwardly on the front end side (cabin 1 side) of the floor section 21. It is equipped with a torii section 23 that extends to.
In addition, the loading platform 20 is not provided with side tilt and rear tilt (see Figures 1 and 2), and is a full-width hinge type that extends along the entire area in the vehicle width direction (Y direction) at the rear end. A loading platform rear end slope (hereinafter referred to as "rear end slope") 30 is rotatably connected via a hinge 40 (see FIGS. 1 and 3).

Furthermore, a grounding roller 25 is provided on the bottom surface of the rear end of the loading platform 20 . According to this configuration, when the rear end portion of the loading platform 20 is lowered onto the ground GL, the ground roller 25 contacts the ground GL, and the loading platform 20 and the rear end slope 30 can be smoothly moved on the ground GL. can.

Further, the rear end slope 30 is formed into a rectangular shape in a plan view, and the length in the vehicle width direction (Y direction) is approximately the same as the length in the vehicle width direction (Y direction) of the loading platform 20. It has become. Further, the upper surface side of the rear end slope 30 is a tapered surface with a gentle upward slope from the rear end (free end) to the front end connected to the hinge 40 (see FIG. 1).

As shown in FIG. 1, when the rear end slope 30 is lowered onto the ground GL together with the loading platform 20, its lower surface (back surface) side is in contact with the ground GL, and the rear end of the loading platform 20 is in contact with the ground GL. It is in a state where it is spanned over via the hinge 40, and its upper surface (surface) side forms a tapered surface with a gentle upward slope that connects the ground GL and the loading platform 20. In this way, the rear end slope 30 forms a tapered surface with a gentle upward slope that connects from the ground GL to the loading platform 20. Therefore, the operator drives the vehicle to be transported on the ground GL and tapers the above-mentioned taper. Vehicles can be loaded onto the loading platform 20 by allowing the surface to pass through.

Note that the rear end slope 30 of this embodiment has a length dimension in the vehicle width direction (Y direction) that is the same as a length dimension in the vehicle width direction (Y direction) of the loading platform 20. It is connected to the end portion via a full-width hinge type hinge 40 that extends along the entire area of the loading platform 20 in the vehicle width direction (Y direction) (see FIGS. 1 and 3).
Therefore, it is possible to easily load a vehicle such as a car onto the loading platform 20.

Further, as shown in FIG. 2, when the rail 10 and the loading platform 20 are arranged on the chassis 3 and in a state parallel to the chassis 3 (travelable state), the rear end slope 30 is connected to a locking mechanism 50, which will be described later. As a result, it is fixed in a state where it lies down substantially horizontally with respect to the loading platform 20.

As described above, the freight vehicle W of this embodiment has no rear gate or rear gate at the rear end of the loading platform 20, and is provided with a rear end slope 30 for loading and unloading cargo such as vehicles onto the loading platform 20. Further, when the rear end slope 30 is in a travelable state, it is fixed in a state where it lies down substantially horizontally with respect to the loading platform 20 (see FIG. 2(a)). Therefore, the rear end slope 30 of the freight vehicle W of this embodiment is different from the rear end slope 30 of the freight vehicle W when the vehicle is traveling, like the conventional freight vehicle equipped with "a rear gate that is vertically installed and fixed to the loading platform". Therefore, there is no strong wind resistance.
In addition, when the rear end slope 30 is in a driveable state, it is fixed in a state where it lies down substantially horizontally with respect to the loading platform 20. Therefore, for example, when a car (vehicle) with a long overall length is loaded on the loading platform, Even when the vehicle is being transported, it will not damage the bumper or the like of the vehicle being transported, unlike a truck equipped with a rear gate.

Moreover, since the loading platform 20 of this embodiment is not provided with side tilts on both the left and right sides, it can also be used to transport cargo such as a vehicle with a long width dimension by loading it on the loading platform.

<<Lock mechanism 50 of rear end slope 30>>
Next, the locking mechanism 50 for fixing the rear end slope 30 of the freight vehicle W of this embodiment will be explained with reference to FIGS. 4 to 6.

Here, FIG. 4 is a schematic diagram for explaining the locking mechanism constituting the loading platform mechanism of this embodiment, and (a) shows a tongue piece at the rear end of the guide rail of the truck. It is a schematic diagram showing a state in which the lock is released before the receiving part of the slope is inserted and fitted, and (b) is a schematic diagram showing the state where the lock is released before the receiving part of the slope is inserted. It is a schematic diagram which showed the state where the receiving part is inserted and locked.
Moreover, FIG. 5 is a schematic diagram showing the configuration of a tongue piece part that constitutes a locking mechanism provided on the rear side of the guide rail of the freight vehicle of this embodiment. FIG. 6 is a schematic diagram showing the configuration of a receiving part constituting a locking mechanism provided on the back side of the slope at the rear end of the loading platform of the freight vehicle of this embodiment.

The locking mechanism 50 described above includes a tongue portion 50A (see FIGS. 4 and 5) that constitutes a male member provided on the rear side of the rail 10, and a female member provided on the back surface of the rear end slope 30. It has a receiving part 50B (see FIGS. 4 and 6), and the tongue part 50A is removably inserted into the receiving part 50B.

As shown in FIGS. 4 and 5, the tongue portion 50A is formed on the rear side of the rail 10 in a substantially tongue shape that is parallel to the vehicle longitudinal direction (X direction) and protrudes rearward.
Further, as shown in FIGS. 4 and 6, the receiving portion 50B is formed on the rear side of the lower surface (back surface) of the rear end slope 30 in a substantially arch shape having an opening 50B1 on the front surface, and a tongue piece is provided in the opening 50B1. 50A is inserted, and the tongue portion 50A is fitted.
Note that the opening 50B1 of the receiving portion 50B is formed in a size that allows the tongue portion 50A to be inserted and detached therein.

When the loading platform moving and tilting mechanism moves the loading platform 20 toward the front of the vehicle from the unlocked state (the state shown in FIG. 4A) in which the rear end slope 30 is not fixed by the locking mechanism 50, the loading platform 20 At the same time, the rear end slope 30 also moves toward the front of the vehicle. Furthermore, when the rear end slope 30 moves toward the vehicle/front side together with the loading platform 20, the receiving portion 50B of the rear end slope 30 moves forward and approaches the tongue portion 50A on the rear side of the rail 10, and as shown in FIG. As shown in (b), the receiving portion 50B of the rear end slope 30 is inserted into the tongue portion 50A of the rail 10. Thereby, the rear end slope 30 is fixed (locked) to the rail 10 in a state where it lies down substantially horizontally with respect to the loading platform 20.

On the other hand, when the rear end slope 30 is fixed by the locking mechanism 50 (the state shown in FIG. 4(b)), when the fixation (lock) of the locking mechanism 50 is released, the loading platform moving and tilting mechanism moves the loading platform 20 backward. Slide it to . As a result, the rear end slope 30 also slides rearward together with the loading platform 20, and the receiving part B of the rear end slope 30 is disengaged from the convex piece part 50A of the rail 10 and separated, and is fixed by the locking mechanism 50 ( lock) is released.

《Operation of the loading platform mechanism when loading and unloading cargo onto a truck》
Next, the operation of the loading platform mechanism during loading and unloading work of cargo by the truck W of this embodiment will be described using an example in which a vehicle (automobile) is loaded onto the loading platform 20.
Here, a case will be described in which the cargo vehicle W is in a travelable state (the state shown in FIG. 2), the loading platform 20 is lowered to the ground GL, and the loading platform 20 is tilted, and a vehicle is loaded onto the loading platform 20.
In addition, in the freight vehicle W shown in FIG. 2, the locking mechanism 50 allows the rail 10 to be locked in a state in which the rear end slope 30 connected to the rear end of the loading platform 20 is laid down approximately horizontally with respect to the loading platform 20. Fixed.

The operator operates the loading platform moving and tilting mechanism of the truck W in the driveable state shown in FIG. move backwards. At this time, as described above, the rear end slope 30 fixed to the guide rail 10 is automatically unlocked by the lock mechanism 50.

After that, when the loading platform 20 (and the rear end slope 30) moves backward to some extent, the rail 10 tilts rearward due to the weight of the loading platform 20 itself, and the loading platform 20 tilts together with the rail 10 while moving along the rail 10. move backwards. At this time, the rear end slope 30 is also pushed by the loading platform 20 and moves rearward together with the loading platform 20. Further, when the loading platform 20 and the rear end slope 30 move backward to some extent, the grounding roller 25 on the bottom side of the rear end of the loading platform 20 comes into contact with the ground GL, and the back side of the rear end slope 30 comes into contact with the ground. It becomes a state. Thereafter, the loading platform 20 and the rear end slope 30 move rearward until most of the loading platform 20 is lowered to the ground GL and is in an inclined state as shown in FIG. 1, and then stops.
In this embodiment, since the grounding roller is provided at the rear end of the loading platform 20, when the rear end of the loading platform 20 is lowered onto the ground GL, the grounding roller 25 is in contact with the ground GL. On the other hand, the loading platform 20 and the rear end slope 30 can be moved smoothly.

Then, as shown in FIG. 1, when the loading platform 20 is lowered from the chassis 3 to the ground GL side and the rear end of the loading platform 20 (ground roller 25) is brought into contact with the ground GL and tilted, automatically: A rear end slope 30 connected to the rear end of the loading platform 20 forms a tapered surface with a gentle upward slope that bridges the loading platform and the ground GL.
Thereafter, the worker, for example, drives the vehicle (automobile) to be transported, moves the vehicle through the rear end slope 30 of the tapered surface with a gentle upward slope, and loads the vehicle onto the floor 21 of the loading platform 20. Fix the vehicle to 21.

Further, when the vehicle is moved to the floor 21 of the loading platform 20 and is loaded and fixed, the operator operates the loading platform moving and tilting mechanism of the freight vehicle W and applying a load to the front side of the loading platform 20 using the loading platform moving and tilting mechanism. , when the operation is reversed to the above, the vehicle returns to the travelable state (the state shown in FIG. 2) in which the rail 10 and the loading platform 20 are placed horizontally (parallel to the chassis 3) on the chassis 3. At this time, as described above, the locking mechanism 50 automatically locks the rear end slope 30 to the guide rail 10 in a state where it lies down substantially horizontally with respect to the loading platform 20.

As described above, according to the present embodiment, by moving the loading platform 20 forward and backward using the loading platform moving and tilting mechanism, the rear end slope 30 can be automatically switched between the locked state and the unlocked state. . Furthermore, when the loading platform 20 is placed in an inclined state, the rear end slope 30 connected to the rear end of the loading platform 20 automatically forms a tapered surface with a gentle upward slope that bridges the loading platform 20 and the ground GL.
Therefore, according to the present embodiment, unlike the rear gate of the prior art, "when loading and unloading cargo such as vehicles on the loading platform, the operator operates the locking mechanism of the loading platform and collapses the rear gate". This eliminates the need for ``operations such as erecting and erecting objects,'' and the labor required for loading and unloading objects to be transported, such as vehicles (automobiles), onto the loading platform 20 can be significantly reduced.

Further, in the loading platform mechanism of this embodiment, the locking mechanism 50 locks the rear end slope 30 to the loading platform when the guide rail 10 and loading platform 20 are arranged on the chassis 3 and are in a state where they can run parallel to the chassis 3. It is fixed and locked to the guide rail 10 in a state where it lies down substantially horizontally with respect to the guide rail 20.
Therefore, according to the present embodiment, when the truck is traveling, the slope at the rear end of the loading platform is lowered, as in the prior art, which is equipped with a "rear gate that is vertically installed and fixed to the loading platform." Since it is not subject to strong wind resistance, fuel efficiency can be improved compared to conventional freight vehicles equipped with rear gates.

In addition, in this embodiment, when the vehicle is in the driveable state, the rear end slope 30 is locked in a substantially horizontal position with respect to the loading platform 20. Even when the vehicle is transported by loading it onto a truck 20, it will not damage the bumper or the like of the vehicle being transported, unlike a truck equipped with a rear gate.

Furthermore, in the freight vehicle W of the present embodiment, the locking mechanism 50 is configured to fix and lock the rear end slope 30 to the rail 10 in a state in which it is laid down substantially horizontally with respect to the loading platform 20, so that it is different from the conventional technology. Compared to a "rear gate that is fixed perpendicularly to the loading platform", it has a simpler structure (the tongue section 50A provided on the rail 10 and the receiving section 50B provided on the rear end slope 30). It is possible to reduce weight and cost.

As explained above, according to the present embodiment, the loading platform mechanism for a freight vehicle W is provided with a loading platform moving and tilting mechanism, which reduces the labor of the operator when loading and unloading cargo to be transported onto the loading platform 20. In addition, it is possible to provide a loading platform mechanism that reduces wind resistance during travel.

Note that the present invention is not limited to the embodiments described above, and various changes can be made within the scope of the invention.

Although FIG. 1 described above shows a loading platform moving and tilting mechanism of a type in which the entire loading platform 20 is lowered from the chassis 3 to the ground GL and the loading platform is placed in a gently inclined state, the present invention is not particularly limited to this. isn't it. For example, as shown in FIG. 7, even if the loading platform moving and tilting mechanism is of a type in which a part of the loading platform 20 (about half in the illustrated example) is lowered onto the ground GL and arranged at an angle, the present embodiment can be used. A loading platform mechanism can be applied.
Here, FIG. 7 is a schematic diagram showing a truck equipped with a loading platform moving and tilting mechanism and a loading platform mechanism according to a modification of the present embodiment, in which a part of the loading platform is lowered from the chassis to the ground by the loading platform moving and tilting mechanism. FIG. 2 is a schematic diagram showing a state in which the loading platform is tilted and the slope at the rear end of the loading platform spans the loading platform and the ground.

W... Freight vehicle 1... Cabin 3... Chassis 5... Inclined base shaft 10... Guide rail 13... Support legs 20... Loading platform 21... Floor section 23... Torii section 25... Ground roller 30... Loading platform rear end slope 40... Hinge 50... Lock mechanism 50A...tongue part 50B...receiving part 50B1...opening

Claims (4)

A loading platform mechanism for a freight vehicle that is equipped with a loading platform movement and tilting mechanism that moves the loading platform in the front-rear direction along guide rails provided on the chassis to tilt the loading platform or to place the loading platform in a horizontal state on the chassis. And,
A cargo platform having a floor section on which cargo is placed;
a hinge provided at the rear end of the floor;
a loading platform rear end slope connected to the rear end of the floor portion via the hinge;
a locking mechanism that detachably fixes the rear end slope of the loading platform to the guide rail,
The locking mechanism is
When the guide rail and the loading platform are arranged on the chassis and are in a state where they can run parallel to the chassis, the rear end slope of the loading platform is laid down substantially horizontally with respect to the loading platform. It is designed to be fixed and locked to the guide rail, and
A freight vehicle characterized in that the loading platform is moved forward and backward by the loading platform moving and tilting mechanism to lock and unlock the rear end slope of the loading platform. Loading platform mechanism. When the loading platform is moved rearward and tilted by the loading platform moving and tilting mechanism so that the rear end of the bottom surface of the loading platform is in contact with the ground, the loading platform is automatically connected to the rear end of the loading platform. 2. The loading platform mechanism according to claim 1, wherein the rear end slope of the loading platform forms a tapered surface with an upward slope that bridges the loading platform and the ground. The locking mechanism is
a tongue piece protruding in a substantially tongue shape provided on the rear side of the guide rail;
a receiving portion provided on the back surface of the rear end slope of the loading platform, into which the tongue portion is removably inserted;
When the tongue piece of the guide rail is inserted into the receiving part of the rear end slope of the loading platform and the rear slope of the loading platform is fixed and locked to the guide rail, the loading platform moving and tilting mechanism moves the loading platform backward. By moving, the receiving part of the rear end slope of the loading platform is separated from the tongue part and the lock is released,
When the rear end slope of the loading platform is not fixed to the guide rail, by moving the loading platform forward by the loading platform moving and tilting mechanism, the tongue portion of the guide rail is attached to the receiving portion of the rear end slope of the loading platform. The loading platform mechanism according to claim 1 or 2, wherein the loading platform rear end slope is locked to the guide rail by being inserted into the loading platform mechanism. 3. The loading platform mechanism for a freight vehicle according to claim 1, wherein the loading platform is not provided with side tilts on both left and right sides, and a grounding roller is provided on a bottom surface portion on a rear end side.

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