JPH09309376A - Motor truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discharge a cargo easily from an inclined deck by providing a movable plate longitudinally movable on the deck at the time of the deck being inclined in a motor truck provided with deck support mechanism for supporting the deck, longitudinally movable on an undercarriage, in an inclined state at the time of moving backward. SOLUTION: In case of carrying a power shovel using a motor truck, a hydraulic cylinder 520 is contracted, and a hydraulic cylinder 530 is expanded. In this state, a change-over control valve is operated to move a deck 30 backward. The hydraulic cylinder 520 is then expanded, and the hydraulic cylinder 530 is contracted to incline the deck 30. The power shovel is then self-advanced to go up on the deck 30, but at the time of the engine trouble of the power shovel, the change-over control valve or a clutch 451 of a hydraulic motor 45 is operated to move a protector 440 backward. The protector 440 and the power shovel are connected by a wire, and the protector 440 is advanced to pull up the power shovel onto the deck 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truck, and more specifically, it is suitable for transporting special cargo such as heavy machinery for civil engineering and construction, and also for carrying general cargo such as scrap from civil engineering and construction work. For trucks that are also used for transportation. About trucks that can carry heavy equipment to the site such as building dismantling work and load waste materials from the site, and conversely, carry materials to the site and load heavy equipment from the site with the same vehicle ,
The present invention relates to an improvement around the loading platform for improving processing efficiency.

[0002]

2. Description of the Related Art In the general vehicle for transporting heavy equipment shown in FIG. 10, a chassis 20a and a cargo bed 30a are made sturdy so as to bear the weight of the heavy equipment. Then, for example, when the power shovel 60 is carried to the site, the beam 61 is installed obliquely behind the chassis 20a, and the beam 61 can be crossed over the power shovel 60 (see FIG. 10A). Mount the power shovel 60 on the
(See (b)), it is designed to be transported. However, since such a vehicle is designed only for transporting heavy machinery, after transporting the heavy machinery to the site, there was no choice but to return it to an empty state or save it.

On the other hand, the trucks shown in FIGS. 11 to 13 have been conventionally used by the applicant, but have been improved so that they can be used for carrying general cargo in addition to carrying heavy machinery. is there. To this end, this truck is
With respect to the chassis 20 following 0, the loading platform 30 on it can move in the front-back direction. That is, chassis 2
0 and the bed 30 are separated, and these move relative to each other as the hydraulic cylinder 51 expands and contracts.

In addition, a connecting rod 52 is provided at the front portion of the lower surface of the loading platform 30.
Is fixed downward, and a rolling wheel is projectingly provided at the tip of the connecting rod 52, and the rolling wheel at the tip of the connecting rod 52 is fitted to the guide groove formed in the front and rear direction of the chassis 20 to open upward. By being movably fitted to each other, a loading platform front support mechanism is formed based on the positive movement cam that uses the connecting rod 52 as a follower and the guide groove of the chassis 20 as a master. The cam mechanism allows the front part of the platform 30 to come into contact with and ride on the chassis 20 during the forward movement, while the front part rises away from the chassis 20 during the rearward movement so that the rear part is lowered and inclined. There is.

Further, a support rod 53 is provided at the rear end of the chassis 20.
Is swingably supported, and the upper end of the support rod 53 is movably fitted along a guide groove that opens downward in the luggage carrier 30 and is formed in the front-rear direction. In the rear support mechanism of the loading platform configured as described above, the support rod 53
Makes a relative movement with respect to the loading platform 30 at all times, and the lower end of the support rod 53 moves away from the ground when the loading platform 30 moves forward, while the lower end of the supporting rod 53 contacts the ground when the loading platform 30 moves backward. It comes into contact with and supports the middle portion of the cargo bed 30 under the ground.

The loading platform 30 can be provided with side plates on four sides on the upper surface thereof. The protector 44 as a front side plate is fixed, but the left side plate 41, the right side plate 43, and the rear side plate 42, which are called a fan, are detachable. When the side plates 41, 42, 43 are removed, the plate-like body is suitable for mounting on heavy equipment.
When 3 is attached, a box-shaped body for loading general cargo is formed. In addition, the protector 44 is provided with a through hole for a wire. Furthermore, the wire winding unit 45a (winch) and the hydraulic motor 45 for driving the same are also attached.

When the power shovel 60 is transported to the site by using such a truck, first, the truck and the power shovel 60 are lined up front and back on a flat place. Next, by operating the switching control valve of the hydraulic cylinder 51 with respect to the truck to contract the hydraulic cylinder 51, the platform 30 is moved to the rear of the chassis 20 and tilted rearward and downward.
The rear end of the loading platform 30 is tilted until it reaches the ground. Then, the load carrier 30 is climbed while the power shovel 60 is moved backward (see FIG. 11A). Then, when the power shovel 60 is completely placed on the platform 30, the switching control valve is operated in the reverse direction to extend the hydraulic cylinder 51, thereby moving the platform 30 to the front of the chassis 20 to move the power shovel 60. It is completely mounted on the chassis 20 together with the loading platform 30 (see FIG. 11B). Thus, power shovel 6
0 is transported to the site, and at the site, the reverse operation is performed and the power shovel 60 is lowered.

After the cargo bed 30 is emptied, the side plates 41, 42 and 43 are set on the cargo bed 30 so that general cargo can be loaded. Then, when the waste material 70 comes out due to, for example, the dismantling work of the house in the field, the waste material 70 is loaded on the loading platform 30 using the power shovel 60 or the like in the same manner as for a normal cargo truck (see FIG. 12 (a)). ). Then, the waste material 70 is transported and taken home, or is carried to the disposal site of the waste material 70. There, by contracting the hydraulic cylinder 51, the platform 30 is moved backward and tilted until the rear end of the platform 30 reaches the ground (FIG. 12).
(B)). Then, the rear side plate 42 is removed, and the waste material 70
Discharge it by sliding it down the slope and lowering it.

As described above, since it can be used for transporting general cargo in addition to transporting heavy machinery, it is not necessary to prepare general cargo trucks in addition to vehicles for transporting heavy machinery and to provide a driver or the like to each. It has become possible to complete useful work for both round trips with one truck. As a result, the work efficiency was improved, and the equipment cost and labor cost required for civil engineering / construction work such as dismantling could be saved.

[0010]

However, in such a conventional truck, in addition to the lowering of the height of the chassis and the loading platform for loading and unloading heavy equipment, a movable loading platform when tilted. Since the connecting rods and supporting rods support the front and middle rear parts of the loading platform to support them under heavy load, there are restrictions on the length of these rods. It cannot be tilted greatly (see FIG. 13 (a)). For this reason, it is necessary to manually pull down waste materials, which have a large coefficient of friction with the steel carrier, because they cannot slide down just by tilting the carrier. Therefore, it is an issue to devise and further improve the structure of the truck so that even cargo that is not slippery can be easily discharged from the bed without manpower.

[0011] Further, not only a flat place but also a step or a slope is often formed in a waste disposal site for waste materials or a refuse incineration site. Even if the ground is flat, it may have to be discharged so as to be piled up on the previous wastes, refuses to be incinerated, etc., so that they may substantially form a step or the like. Even in such a case, since the length of the connecting rod is also restricted, a sufficient inclination cannot be secured. Furthermore, since the support rod (53) does not reach the ground, the force for supporting the inclined platform will be insufficient (see FIG. 13 (b)). It is even more serious when loading heavy equipment in such a place. Therefore, it is also an issue to devise a truck structure that can sufficiently support the cargo bed against load even when cargo is discharged or heavy equipment is mounted at such a place.

The present invention has been made in order to solve such a problem, and an object thereof is to realize a truck in which cargo can be easily discharged from an inclined platform. Another object of the present invention is to realize a truck capable of supporting a slanted bed even on an uneven ground.

[0013]

The constitution, operation and effect of the first to fifth means for solving the problems, which have been invented in order to solve such problems, will be described below.

[First Solving Means] The truck of the first solving means (as described in claim 1 at the time of application) has a loading platform that can move back and forth on the chassis, and the loading platform can move forward when moving backward. A truck having a loading platform support mechanism that tilts and supports the loading platform in a raised or lowered position, and includes a movable plate that can be moved back and forth by mechanical drive on the loading platform at least when the loading platform is tilted. It is what

In the truck of the first means as described above, the loading platform is moved backward on the chassis to support it in an inclined state so as to facilitate the work when loading and unloading cargo such as heavy equipment and waste materials. In particular, when the load is only slanted when the load is discharged and the load remains without slipping off from the load, the movable plate is moved from the front to the back. Then,
The mechanical driving force forces the load to be discharged.

As a result, even a cargo that has a small inclination of the loading platform and does not slip off can be easily discharged from the loading platform without manpower. In addition, since the driving force at this time is sufficient to compensate for the insufficient tilting of the loading platform, the driving source and the driving mechanism can be simple and small. Therefore, according to the present invention, it is possible to realize a truck in which cargo can be easily discharged from the inclined platform.

[Second Solving Means] A truck of the second solving means (as described in claim 2 at the time of filing the application) has a chassis, a loading platform movable back and forth on the chassis, and a loading platform of the loading platform. A loading platform front support mechanism that connects the front section and the chassis and tilts the loading platform forward or backward when moving backward, and a loading platform that supports the loading platform in a rearward or intermediate direction in an upward or obliquely upward direction when tilting. In a truck provided with a rear support mechanism, the cargo bed rear support mechanism is extendable / contractible in a supporting direction at least when the cargo bed is tilted.

In the truck of the second means as described above, the loading platform is moved backward and tilted on the undercarriage so as to facilitate the work at the time of loading and unloading the cargo, and the ground can be endured even with a heavy load. The rear end of the upper loading platform and the front part of the loading platform connected to the loading platform are supported, and in addition, the rear or middle of the loading platform is also supported by the rear supporting mechanism of the rear loading platform. Therefore, in general, by keeping the load carrier rear support mechanism in a contracted state, it is possible to prevent the inconvenience of being stuck on the ground and obstructing the movement of the load carrier and ensuring the inclination. Then, when the cargo bed is moved backward and tilted to load and unload cargo, the cargo bed rear support mechanism is extended. Extend until it touches the ground.

As a result, even in a place where the length of the ground cannot be adjusted by the conventional supporting rods because the ground is not flat, the rear support mechanism of the load carrier reaches the ground, so that the load carrier can be reliably supported. Therefore, according to the present invention, it is possible to realize a truck capable of supporting a slanted bed even on an uneven surface.

[Third Solving Means] A truck of the third solving means (as described in claim 3 at the time of filing the application) has a chassis, a load platform movable back and forth on the chassis, and A loading platform front support mechanism that connects the front section and the chassis and tilts the loading platform forward or backward when moving backward, and a loading platform that supports the loading platform in a rearward or intermediate direction in an upward or obliquely upward direction when tilting. In a truck provided with a rear support mechanism, the cargo bed front support mechanism is extendable / contractible in at least the connecting direction when the cargo bed is tilted.

In the truck of the third means as described above, since the front support mechanism of the load carrier is extendable, if it is extended, the inclination of the load carrier can be increased correspondingly. You can Even if the rear end of the loading platform hits the ground and prevents the loading platform from tilting if it is moved to the end, stop the loading platform at some position before the movable rearmost position and support the loading platform front part. Just extend the mechanism. As a result, it is possible to obtain a larger loading platform inclination than ever before. Therefore, according to the present invention,
It is possible to realize a truck capable of ensuring a sufficient inclination of the loading platform not only on flat ground but also on non-flat ground.

[Fourth Solving Means] The track of the fourth solving means (as described in claim 4 at the beginning of the application) is the track of the above-mentioned second solving means and third solving means. It is characterized in that it is provided with control means for controlling the front support mechanism of the platform and the rear support mechanism of the platform when one of them is extended and the other is contracted.

In the truck of the fourth solving means as described above, when the loading platform is moved, the loading platform front support mechanism is contracted. At this time, since the inclination is small, the movement of the luggage carrier will not be hindered even if the luggage carrier rear support mechanism is extended. When loading and unloading cargo, the cargo bed is tilted by lowering the cargo bed backward and then extending the cargo bed front support mechanism. At this time, the luggage carrier rear support mechanism contracts and reaches a predetermined length of its mechanical limit. Then, the rear support mechanism of the load carrier is adjusted so as to be grounded due to a change in the tilt limit of the load carrier or the like. Then, cargo such as heavy equipment is loaded on the bed.

Thus, since the rear end of the luggage carrier, the rear supporting mechanism of the luggage carrier, the rear end point of the chassis and the front supporting mechanism of the luggage carrier are supported at four points, the luggage carrier is stably supported. In particular, since the luggage carrier rear support mechanism has a predetermined length and exerts a strong mechanical reaction force, the luggage carrier is reliably supported. Therefore, according to the present invention,
It is possible to realize a truck which can secure a sufficient inclination of the loading platform and can reliably support the inclined loading platform not only on flat ground but also on non-flat ground.

[Fifth Solving Means] The truck of the fifth solving means (as described in claim 5 at the beginning of the application) comprises a movable plate which can be moved forward and backward by mechanical drive on the platform. It is characterized by having.

In the truck of the fifth solving means as described above, by moving the movable plate from the front to the rear, the load is forcibly discharged by the mechanical driving force. Thereby, the cargo on the cargo bed can be easily discharged from the cargo bed without manpower. Therefore, according to the present invention,
It is possible to realize a truck that easily discharges cargo from the loading platform.

[0027]

BEST MODE FOR CARRYING OUT THE INVENTION With respect to the truck of the present invention achieved by such a solving means, a mode for carrying out this will be described.

[First Embodiment] A truck according to a first embodiment of the present invention connects an undercarriage, a luggage carrier that can move back and forth on the undercarriage, and a front portion of the luggage carrier and the undercarriage. A truck including a front support mechanism for the bed that tilts the cargo bed forward or backward when moving backward, and a rear support mechanism for the cargo bed that supports the cargo bed at a rear portion or an intermediate position in an upward direction or an obliquely upward direction when tilting. A movable plate that can be moved forward and backward by a mechanical drive on the cargo bed at least when the cargo bed is tilted, and the cargo bed front support mechanism is expandable / contractible in the connecting direction at least when the cargo bed is tilted. The cargo bed rear support mechanism is capable of expanding and contracting in the supporting direction at least when the cargo bed is tilted. As a result, it is possible to realize a truck that can support a slanted bed even on an uneven ground and that can easily discharge cargo from the slanted bed.

[Second Embodiment] In the second embodiment of the present invention, in the truck of the above-mentioned solving means and embodiment, the movable plate is a protector, that is, a front side plate provided on the front part of the upper surface of the loading platform. It is also characterized in that it doubles as an individual item. In the case of individualizing, it can be realized with relatively few modifications based on a heavy-duty vehicle or a general-purpose truck for general cargo transportation. On the other hand, when it also serves as a protector, it is possible to secure a sufficient cargo loading area on the upper surface of the loading platform.

[Third Embodiment] In the third embodiment of the present invention, in the truck of the above-mentioned solving means and embodiment, the mechanism for driving the movement of the movable plate is a gear mechanism or a wire pulling mechanism. It is characterized by being. According to the wire pulling mechanism, the movable mechanism can be easily embodied by using an existing winch or the like. On the other hand, according to the gear mechanism, even a movable mechanism can have a highly rigid and sturdy structure, and it is not necessary to pay attention to damage or entanglement of the wire.

[Fourth Embodiment] The fourth embodiment of the present invention is, in the truck of the above-mentioned solving means and embodiment, both the front support mechanism and the rear support mechanism of the cargo bed are expanded and contracted. It is characterized in that the means changes the expansion / contraction state so as to generate a pushing-up force that opposes this pushing-down force by the loading platform.

In the truck of the fourth embodiment as described above, the expansion / contraction state of the support mechanism is determined based on the balance of forces, so that the detection means such as the position sensor which is easily broken and the detection result thereof can be used. Even without providing complicated control means based on a relatively simple method of transmitting the necessary force (such as performing reverse motion of expansion and contraction,
Alternatively, it is possible to embody a support mechanism (which both expands or contracts together). Therefore, according to the present invention, it is possible to realize a truck capable of supporting the inclined platform even on a non-flat ground with a simple structure.

[Fifth Embodiment] In the fifth embodiment of the present invention, in the truck of the above-mentioned solving means and embodiment, both of the front loading support mechanism and the rear loading support mechanism are expanded and contracted. The means are hydraulic cylinders, and the hydraulic pressure sources or hydraulic supply paths of these hydraulic cylinders are in communication with each other. As a result, it is possible to embody a support mechanism having a simple structure, which has an expanding / contracting means whose expansion / contraction state is changed so as to generate a pushing-up force that counteracts the pushing-down force of the loading platform.

[0034]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete structure of a first embodiment of a truck of the present invention will be described with reference to the drawings. FIG.
It is a schematic diagram showing the structure, and FIG. 2 is a sectional view of the chassis.

This truck has a vehicle body 1 similar to the conventional one.
It has 0, a chassis 20, and a luggage carrier 30. That is,
A steel chassis 20 connected to the vehicle body 10 including a passenger seat, an engine, and the like, and a front and rear relative movement on the chassis 20 supported by the front and rear support mechanisms of the carrier and the hydraulic cylinders 51 that are extended and contracted. Heavy equipment equipped with a steel carrier 30
The transport vehicle is also used as a scrap material, and the chassis 20 is formed with a guide groove 54 or the like serving as a prominent node of the positive cam for tilting the carrier 30 when the carrier is moved rearward. A roller 55 is fitted to the upper part of the rear end to fit and support the roller so as to be relatively movable (see FIG. 2). Further, a left side plate 41, a rear side plate 42, a right side plate 43, and a winch driving hydraulic motor 45, which are detachable from the loading platform 30, and are made of aluminum are also provided as in the conventional case.

On the other hand, the front plate or protector 4
40 is a movable plate that can be moved back and forth on the platform 30 by mechanical drive, the front support mechanism of the platform is extendable in the connecting direction, and the rear support mechanism of the platform is also supported. It differs from the conventional dual-purpose truck in that it can be expanded and contracted in the direction. Hereinafter, these differences will be mainly described.

In the loading platform front support mechanism, the conventional connecting rod 52 is replaced by a hydraulic cylinder 520, and it can be expanded and contracted in the connecting direction as the hydraulic cylinder 520 expands and contracts. Further, the conventional support rod 53 is replaced by the hydraulic cylinder 530, and the rear support mechanism of the luggage platform is also expandable and contractable in the supporting direction as the hydraulic cylinder 530 expands and contracts.

Furthermore, these hydraulic cylinders 520, 5
30 is supplied with driving fluid of the same pressure from a hydraulic pump driven by the engine of the vehicle body 10 via a switching control valve V1 and a hydraulic hose communicating therewith (see FIG. 7).
The oil passage on the head side of the hydraulic cylinder 520 and the oil passage on the rod side of the hydraulic cylinder 530 are connected, and the oil passage on the rod side of the hydraulic cylinder 520 and the hydraulic cylinder 53 are connected.
0 is connected to the oil passage on the head side. Accordingly, when the hydraulic cylinder 520 is extended, the hydraulic cylinder 530
While the hydraulic cylinder 520 contracts, the hydraulic cylinder 530 expands when the hydraulic cylinder 520 contracts. In addition, the expansion / contraction is selectively controlled by the switching control valve V1.

The protector 440 is not directly fixed to the luggage carrier 30 but is provided separately, and the pair of sliders 4 is provided.
Supported by 41. The slider 441 having the pinion 442 therein is attached to the rack rails 443 provided in parallel on the left and right sides of the upper surface of the luggage carrier 30 and moves relative to the rack rails 443 as the pinion 442 rotates. Further, the pinion 442 that transmits the mechanical driving force at this time is driven by the hydraulic motor 45 with the clutch 451 interposed. Thereby, the protector 440 also serving as the movable plate is
By operating the clutch, the luggage carrier 30 can be selectively moved forward and backward by gear drive at any time.

The shaft extending from the output side of the clutch 451 to the pinion 442 has a hose winding unit 45.
2 and the wire winding unit 453 are inserted. With this hose winding unit 452, the protector 440
The hydraulic hose to the hydraulic motor 45 that moves together is always maintained at an appropriate length. Further, the wire 454, whose one end is locked to the front end of the luggage carrier 30, is wound by the wire winding unit 453 as the protector 440 moves, so that the forward force of the protector 440 is reinforced. Moreover, the length of the wire 454 is adjusted according to the length of the rack rail 443, and when the protector 440 moves to the rear limit, the wire 454 is released and the protector 440 is tensioned, and the protector 440 moves to the rack rail 443.
It also prevents it from coming off.

Incidentally, FIG. 3 shows a structural example in which the movable plate is provided separately from the protector. In this case, the protector 44
A movable plate 444 is provided on the rear side of, and a pulley 456 is attached to the rear end of the luggage carrier 30. Further, the wire winding unit 45a driven by the hydraulic motor 45 on the front surface of the protector 44 and the movable plate 444 are connected by the wire 45b on the upper side of the loading platform 30. Then, attach the other wire 455 to the loading platform 30.
After extending from the movable plate 444 to the pulley 456 on the upper side of, and winding the pulley 456 there and making a U-turn,
Return to the wire winding unit 45a through the lower side of the loading platform 30. As a result, when the hydraulic motor 45 is operated, the movable plate 444 moves back and forth on the loading platform 30 as the wire is wound and released, so that the wire pulling mechanism using the existing wire winding unit 45a is easily completed. .

Regarding the track of the first embodiment described above,
The mode of use and operation will be described with reference to the drawings. FIG. 4 to FIG. 6 correspond to FIG. 11 of the conventional example and show a usage state for transporting heavy equipment.

Power shovel 60 using this truck
When transporting the truck to the site, first, the truck and the power shovel 60 are lined up front and back. At this time, the ground need not be flat. Next, by operating the switching control valve V1, the hydraulic cylinder 520 is contracted and the hydraulic cylinder 530 is expanded, and the switching control valve of the hydraulic cylinder 51 is operated to move the platform 30 to the rear of the chassis 20. . Then, by operating the switching control valve V1 in reverse, the hydraulic cylinder 520 is operated.
Is expanded and the hydraulic cylinder 530 is contracted. In this way, the rear end of the platform 30 is tilted until it reaches the ground. At this time, if the ground is flat, the rear end of the loading platform 30 and the lower end of the hydraulic cylinder 530 contact the ground almost at the same time (FIG. 4A).
reference). The minimum length of the hydraulic cylinder 530 is designed and adjusted accordingly.

On the other hand, in the case where the rear end of the loading platform 30 is grounded (B) before the grounding position (A) on a flat ground due to a step on the ground (see FIG. 4 (b)), the hydraulic cylinder 520 is once returned to the contracted state, and in consideration of the distance between the hydraulic cylinder 530 and the ground and the shape of the ground, move the loading platform 30 slightly forward (C). (See FIG. 5B). Then, the hydraulic cylinder 520 is extended. Thus, also in this case, the rear end of the platform 30 and the lower end of the hydraulic cylinder 530 are grounded almost at the same time (see FIG. 5A).

Now, the slanted platform 30 is moved to the rear end 3
0b, hydraulic cylinder 530, chassis 20 roller 55, and hydraulic cylinder 520. In this way, the power shovel 60 and the like are ready to be loaded, and then the power shovel 60 and the loading platform 30 are mounted in the same manner as in the conventional case.
You can climb. When the power shovel 60 has an engine trouble, the protector 440 is operated by operating the switching control valve of the hydraulic motor 45 or the clutch 451.
To move backward. Then, the protector 440 and the power shovel 60 are connected by the wire 455, and the protector 440 is advanced this time. Then, the wire 45
4 is wound up by the wire winding unit 453, and along with this, the power shovel 60 together with the protector 440 is pulled up onto the bed 30 (see FIG. 6A).

After the pulling up, the hydraulic motor 45 is stopped, and the switching control valve of the hydraulic cylinder 51 is operated in the opposite direction to extend the hydraulic cylinder 51, thereby moving the platform 30 to the front of the chassis 20. At this time, the switching control valve V1 is also operated to collect the hydraulic cylinder 520, and the power shovel 60 is completely mounted on the chassis 20 together with the luggage carrier 30 (see FIG. 6B). In this way, the power shovel 60 is transported to the site, and the power shovel 60 is unloaded at the site by performing the reverse operation. In addition, loading and unloading of waste materials and the like transported on the way back can be performed in the same manner.

Next, the structure of the track of the second embodiment will be described. This differs from that of the first embodiment described above in that the switching control valve V2 is inserted in the hydraulic pressure supply passage of the hydraulic cylinder 530 so that the forward / backward direction of the hydraulic cylinder 530 can be reversed ( (See FIG. 8). As a result, this truck can select whether the front support mechanism and the rear support mechanism of the platform perform reverse expansion / contraction operations or both expand / contract in accordance with the situation. ing.

The use mode and operation of the truck of the second embodiment will be described with reference to the drawings. FIG. 9 corresponds to FIGS. 12 and 13 of the conventional example,
Shows the state of use for transportation and discharge of waste materials. The loading and unloading of heavy equipment and the loading of waste materials are the same as in the above-described first embodiment if the switching control valve V2 is in the normal state, and therefore a repetitive description will be omitted. The time operation will be described.

Even when the side plates 41, 42, 43 are set on the loading platform 30 and the waste material 70 is loaded, and then the waste material 70 is transported and brought back, the scene of lowering the waste material 70 does not need to be flat. In the initial state in which the hydraulic cylinder 520 contracts and the hydraulic cylinder 530 expands, the switching control valve V2 is operated to the reverse side. Then, when the hydraulic cylinder 530 has also contracted, the rear side plate 42 is removed for the time being and the hydraulic cylinder 51 is contracted. This moves the loading platform 30 rearward. It may be moved until the rear end of the platform 30 is inclined and reaches the ground, but it is stopped a little before that.

Then, the switching control valve V1 is operated to extend the hydraulic cylinders 520 and 530 together. Then, as the hydraulic cylinder 520 extends, the rotation of the roller 55 as a fulcrum causes the inclination of the loading platform 30 to increase and the loading platform 30 to rotate.
The rear end of the hydraulic cylinder 530 comes into contact with the ground.
Also extends and contacts the ground. Thus, the slanted platform 30
However, the rear end 30b, the hydraulic cylinder 530, the chassis 20 roller 55, and the hydraulic cylinder 520 are supported at four points. It should be noted that the above-mentioned operation is performed or the switching control valves V1 and V2 are
Whether the operation is performed in the reverse order of switching or the operation similar to that of the first embodiment may be appropriately selected in consideration of the type of load and the shape of the ground.

When the movement of the loading platform 30 is stopped before the rear end and is inclined, the inclination becomes steeper than in the conventional case, so that the waste material 70 easily slides down along the inclined surface. Since the inclination of the loading platform 30 which has reached only about 15 ° in the past reaches up to about 30 °, the load slides down the inclined surface of the loading platform 30 more quickly than in the past (see FIG. 9A). Still, if there is a residue left behind that is stuck or stuck to the lower layer object, the protector 440 is further moved rearward. In this way, all the cargo is discharged from the cargo bed 30 by the mechanical force, not the human power (FIG. 9B).
reference).

In this way, in addition to carrying heavy equipment, carrying common cargo as well, in order to perform useful work for both round trips with a single truck, superior and efficient working capacity over each dedicated vehicle is achieved. Since it is demonstrated, it is possible to further reduce the equipment cost and labor cost required for civil engineering / construction work such as dismantling.

Although an example in which a hydraulic cylinder is used as the drive mechanism for relatively moving the loading platform and the chassis has been described, the invention is not limited to this. For example, the roller 55 provided at the rear end of the chassis may be replaced with a pinion driven by a hydraulic motor, and a rack rail may be embedded in a corresponding guide groove to form a gear mechanism. Alternatively, two opposing wires connecting the chassis and the cargo bed may be wound by a winch to generate a bidirectional driving force.

[0054]

As is apparent from the above description, in the truck of the first solution means of the present invention, the load is forcibly discharged by the mechanically driven movable plate. As a result, there is an advantageous effect that it is possible to realize a truck in which cargo can be easily discharged from the inclined platform.

Further, in the truck of the second solving means of the present invention, by adopting an expandable and contractible rear platform support mechanism so as to adjust the position serving as a fulcrum by contacting with the ground, It is possible to realize a truck capable of supporting a slanted bed even on an uneven ground.

Further, in the truck of the third means of solving the problems of the present invention, the front support mechanism of the loading platform is made extendable so that the tilting of the loading platform can be increased. However, there is an advantageous effect that it was possible to realize a truck capable of ensuring a sufficient inclination of the loading platform.

Further, in the truck of the fourth solution means of the present invention, the front support mechanism of the loading platform is extended to obtain a steep inclination of the loading platform, and the rear support mechanism of the loading platform is contracted to have a strong mechanical support force. By exerting the above-mentioned advantages, there is an advantageous effect that it is possible to secure a sufficient inclination of the loading platform on a flat ground as well as a non-flat ground and to realize a truck that can reliably support the inclined loading platform.

Further, in the truck of the fifth solution means of the present invention, since the load is forcibly discharged by the mechanically driven movable plate, the cargo can be easily discharged from the cargo bed. There is an advantageous effect that the truck could be realized.

[Brief description of drawings]

FIG. 1 shows a first embodiment of a truck of the present invention,
It is a schematic diagram showing the structure.

FIG. 2 is a sectional view of the chassis.

FIG. 3 is another example of the configuration of the movable plate.

FIG. 4 shows a usage state (preparation for mounting heavy equipment).

FIG. 5 shows a usage state (preparation for mounting heavy machinery).

FIG. 6 shows the usage state (mounted on heavy equipment).

FIG. 7 is a part of the hydraulic circuit.

FIG. 8 is a hydraulic circuit for a second embodiment of the truck of the present invention.

FIG. 9 shows the use state (waste material transportation / waste material discharge).

FIG. 10 is an explanatory diagram of a general vehicle for transporting heavy equipment.

FIG. 11 shows a usage state (transportation of heavy equipment) of a conventional combined-use truck.

FIG. 12 shows the usage state (transportation of waste materials).

FIG. 13 shows the usage state (waste material discharge).

[Explanation of symbols]

10 vehicle body 20 chassis (chassis) 20a chassis (chassis) 30 luggage carrier 30a luggage carrier 30b luggage carrier rear end 41 left side plate (fan) 42 rear side plate 43 right side plate (fan) 44 protector (front side plate) 45 hydraulic motor (winch etc.) Drive unit) 45a Wire winding unit (winch) 45b Wire 51 Hydraulic cylinder (cargo drive mechanism) 52 Connecting rod (follower of positive cam; front support mechanism of load carrier) 53 Support rod (swingable support leg; rear part of load carrier) Supporting mechanism) 54 Guide groove (actual movement cam master; loading platform front supporting mechanism) 55 Roller 60 Power shovel (heavy machinery; special cargo) 61 Beam 70 Waste material ('general cargo) 440 Protector (front side plate; movable plate) 441 Slider (movable plate moving mechanism) 442 Pinion (movable plate driving mechanism) 443 Rack rail (movable plate moving mechanism) 444 Movable plate 451 Clutch (movable plate drive mechanism) 452 Hose winding unit 453 Wire winding unit (winch) 454 Wire 455 Wire 456 Pulley 520 Hydraulic cylinder (connecting mechanism; follower of positive cam;
Supporting mechanism for front part of loading platform) 530 Hydraulic cylinder (swingable supporting leg; supporting mechanism for rear part of loading platform)

Claims (5)

[Claims] 1. A truck provided with a luggage carrier that can move forward and backward on a chassis, and a luggage carrier support mechanism that supports the luggage carrier by tilting it forwardly or downwardly when moving backward.
A truck provided with a movable plate capable of moving back and forth on the platform at least when the platform is inclined by a mechanical drive. 2. A front of a loading platform which connects a vehicle platform, a loading platform capable of moving back and forth on the platform, a front portion of the loading platform and the vehicle platform, and which tilts the loading platform forward or backward when moving backward. In a truck provided with a rear part support mechanism and a rear part support mechanism for supporting the upper part of the rear part or a middle part in an upward or obliquely upward direction at the time of inclining, the rear part support mechanism of the rear part at least in the supporting direction when inclining the lower part. A truck characterized by being stretchable toward and away from it. 3. A vehicle platform, a luggage platform that can move back and forth on the vehicle platform, a front of the vehicle platform that connects the front part of the vehicle platform and the vehicle platform, and tilts the vehicle platform to a front-up or back-down state when moving backward. In a truck provided with a part support mechanism and a load carrier rear support mechanism that supports the load carrier in a rearward or middle direction in an upward direction or an obliquely upward direction when tilting, the load carrier front support mechanism has at least the connecting direction when the load carrier is tilted. A truck characterized by being able to expand and contract toward. 4. A front of a loading platform that connects a vehicle platform, a loading platform that can move back and forth on the platform, a front portion of the loading platform and the vehicle platform, and that tilts the loading platform forward or backward when moving backward. In a truck provided with a part support mechanism and a load carrier rear support mechanism that supports the load carrier in a rearward or middle direction in an upward direction or an obliquely upward direction when tilting, the load carrier front support mechanism has at least the connecting direction when the load carrier is tilted. To the load carrier rear support mechanism, the load carrier rear support mechanism is capable of expanding and contracting in the supporting direction at least when the load carrier is inclined, with respect to the load carrier front support mechanism and the load carrier rear support mechanism. The control means provided by
A track for controlling the contraction of one of the two support mechanisms when the other is expanded. 5. A truck provided with a movable plate which can be moved forward and backward by mechanical drive on a loading platform.