JPH0820276A - Towed vehicle for freight - Google Patents

Abstract

PURPOSE:To allow a load-carrying platform to be inclined backward by stable four-point support structure and allow the load-carrying platform to be freely inclined backward regardless of the ground surface state by erecting cylinders and cylinder rods in the pivotally fixed state respectively between a left shaft end part and a left supporting part and between a right shaft end part and a right supporting part. CONSTITUTION:A shaft 5 is laterally provided at the lower end of a vertical intermediate body part between a high floor body part and a low floor body part in such a way that a left shaft end part 5a and a right shaft end part 5b protrude to the body side part, and the front edge left and right parts of a load-carrying platform 3 are provided with a left supporting part 6 and a right supporting part 7 protruding forward. A cylinder 8 is erected between the vertically opposed left shaft end part 5a and left supporting part 6, and a cylinder 9 is erected between the right shaft end part 5b and right supporting part 7. The load-carrying platform 3 can incline backward and double-act around the shaft 5 as a fulcrum interlockingly with the expanding/contracting action of the cylinder rods 8a, 9a of the cylinders 8, 9. he load-carrying platform can be thereby inclined backward by stable four-point support structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a towed vehicle for freight, which is suitable for transporting a particularly large heavy object for freight, and is capable of loading and unloading safely.

[0002]

2. Description of the Related Art A conventional towed vehicle for freight has a structure in which a walking board is provided at a trailing edge of a loading platform so that the walking board can be raised and lowered, and the walking board is lowered to be loaded and unloaded, as shown in FIG. There is a configuration in which the entire vehicle body 20 including the loading platform 21 can be tilted backward, the entire vehicle body is tilted backward when loading and unloading, and the loading platform is slid to the rear side to be loaded and unloaded.

In the former towed vehicle, an angle difference is generated between the horizontal loading platform and the inclined walking platform, so that when the load is transferred from the walking platform to the loading platform or from the loading platform to the walking platform, respectively. Swing back and forth. Then, there is a problem that the worker engaged in loading and unloading cannot overcome the anxiety such as the swaying of the load and the swaying of the vehicle body due to the swaying.

On the other hand, the latter towed vehicle has a structure in which the entire vehicle body is tilted backward and the loading platform is slid rearward, so that there is no problem because the former does not swing. However, since the vehicle body including the cargo bed is tilted backward by the three-point support structure having the front towed portion 22 as one point, the structure itself is unstable during loading and unloading. I have a problem.

The latter problem mentioned above is, for example, that the cylinders are arranged on the left and right of the front part of the vehicle body of the towed vehicle, and the grounding feet are provided at the lower ends of the rods of the cylinders so that the entire vehicle body can be tilted backward. By this, a stable four-point support structure with two front points and two rear points can be formed. However, in the case of a grounded foot, it is unavoidable to be affected by the condition of the ground, and when the ground is poor, special work such as preparing and applying a backing plate is required.

Further, as described above, in the structure in which the grounding feet are provided at the rod lower ends of the left and right cylinders of the vehicle front part of the towed vehicle, the cylinders are stopped when the grounding feet are landed. Let Then, after releasing the brakes on the wheels, it is necessary to operate the cylinder again to operate the cylinder so that the entire body including the loading platform is tilted backward. Also, when the cylinder is actuated again to end the rearward leaning of the entire vehicle body, the towed vehicle itself moves to the rear side somewhat, so it is necessary to apply the brake again when the entire vehicle body leans backward. Therefore, it takes a lot of time to work backward.

Further, since the structure is such that the entire vehicle body including the loading platform is tilted backward, the cylinder also has high output and heavy weight. In particular, the problem of weight is important because it is closely related to the load capacity, and if the cylinder to be mounted has a high weight, the load capacity becomes small and the transport capacity is inevitably reduced.

[0008]

The first problem to be solved by the present invention is that, while being a towed vehicle, the stable four-point support structure makes it possible to incline the platform backward, and regardless of the state of the ground. The object is to be able to tilt the loading platform freely, and to perform a backward tilting operation and operation of the loading platform smoothly and reliably, without failure, and to minimize the reduction of the load capacity. The second is to prevent the luggage carrier from involuntarily tilting backward with respect to the vehicle body.

[0009]

In order to achieve the above-mentioned object, the present invention forms a towed portion near the front end of a vehicle body, and supports a cargo bed on the rear side of the towed portion so as to be tiltable rearward. A horizontal shaft is provided on the rear side of the towed part so that the coaxial left and right shaft ends project laterally, and the left support is provided on the left and right of the front edge of the luggage carrier. Section and a right support section are respectively projected, and a cylinder and a rod of the same cylinder are pivotally mounted between the left shaft end section and the left support section, and between the right shaft end section and the right support section, which are vertically opposed to each other. Characterized by being installed.

Further, the present invention is characterized in that the vehicle body is provided with a locking element having an engaging claw portion which can be engaged with and disengaged from an engaged portion of the luggage carrier. The locking element may be of an automatic type in which the engaging claw portion is automatically engaged / disengaged with respect to the engaged portion, or may be of a manual type in which the engagement / disengagement operation is manually performed.

[0011]

[Operation] By forming a towed portion near the front end of the vehicle body,
A loading platform is supported on the rear side of the towed portion so as to be tilted rearward, and a support shaft is supported on the rear side of the towed portion, and coaxial left shaft end and right shaft end project to the side of the car body. And the left support portion and the right support portion are respectively provided on the left and right of the front edge of the loading platform so as to project vertically, and between the left shaft end portion and the left support portion and the right shaft end portion which are vertically opposed to each other. Cylinders and rods of the same cylinder are pivotally mounted between the right support parts, so that the load platform can be tilted backward with a stable four-point support structure while being a towed vehicle, and the state of the ground regardless of,
Only the platform can be tilted backwards relative to the vehicle body.

Since a cylinder and a rod of the same cylinder are pivotally mounted between the left shaft end and the left support, and between the right shaft end and the right support, which are vertically opposed to each other, When the cylinder is actuated and the platform is tilted backward and then moved back, the left and right cylinders themselves can make fine movements using the left and right shaft end parts and the left and right support parts as pivot points.
The back tilting operation of the loading platform can be performed smoothly and reliably and there is no failure. Further, the rearward tilting operation of the cargo bed can be performed easily, easily and quickly because the left and right cylinders can be continuously operated until the rearward tilting of the cargo bed is completed while the wheels are brake-locked.

A cylinder and a rod of the cylinder are pivotally mounted between the left shaft end and the left support, and between the right shaft end and the right support, which are vertically opposed to each other. Since only the loading platform can be tilted backward, the cylinder can be covered with medium output and medium weight, and since the cylinder to be mounted is medium weight, the reduction of the loading load can be minimized. As a result, the problem of reduced transport capacity can be solved.

Further, since the vehicle body is provided with the locking element having the engaging claw portion which can be engaged with and disengaged from the engaged portion of the luggage carrier, the luggage carrier is mounted on the vehicle body while the vehicle is not tilted backward while traveling. It can be locked as a unit, and the cargo bed will not lean back backward.

[0015]

1 to 6 show an embodiment of a towed vehicle for freight according to the present invention, in which a car body 1 has a kingpin 2 hung vertically on the lower surface side near the front end of a raised floor body part 1a. At the same time, a loading platform 3 is pivotally supported by a shaft 4 on the low floor vehicle body portion 1b on the rear side of the kingpin 2 so as to be tiltable rearward.

Then, a support shaft 5 is provided at the lower end of the vertical intermediate vehicle body portion 1c between the high-floor vehicle body portion 1a and the low-floor vehicle body portion 1b. And the left support portions 6 on the left and right of the front edge of the loading platform 3.
And a right support portion 7 project forward, respectively, and a cylinder 8 is provided between the left shaft end portion 5a and the left support portion 6 which are vertically opposed to each other.
A cylinder 9 is installed between the right shaft end portion 5b and the right support portion 7. On the left and right sides of the trailing edge of the loading platform 3, walk boards 10, 1
The cylinder 0 is arranged so that it can be raised and lowered.

The left and right cylinders 8 and 9 are pivotally attached to the left and right support portions 6 and 7 near their lower ends, respectively, while the lower ends of rods 8a and 9a of the cylinders are respectively attached to the left and right shaft end portions 5a and 5b. It is pivotally and pivotally mounted, and in association with the expansion and contraction operation of the rods 8a and 9a of the cylinders 8 and 9, the bed 3 can be tilted back and forth about a shaft 4 as a fulcrum.

A locking element is provided on the front part of the low-floor body part 1b.
The lock element 12 has an engaging claw portion 14 that can be engaged with and disengaged from the engaged portion 13 of the luggage carrier 3. Engaging claw 14
Is a half-moon shape and is integrally formed on the upper end of the rotary shaft 15 protruding above the front part of the low-floor vehicle body portion 1b, and through the rotary shaft 15 and the connecting rod 16, an air chamber that is integrally linked
It can be engaged with and disengaged from the elongated hole-shaped engaged portion 13 by receiving a driving force of 17 and rotating about 90 degrees.

In the above embodiment, the left and right step plates 10 are used.
Alternatively, the cylinder 11 and the cylinder 11 may not be provided. In this case, the weight of the left and right step plates 10 and the cylinder 11 is reduced, and the reduction in the load capacity can be minimized. It can contribute to the elimination of the problem of deterioration.

[0020]

【The invention's effect】

A. According to the present invention, a towed portion is formed near the front end of the vehicle body, a load platform is supported on the rear side of the towed portion so as to be tilted rearward, and a support shaft is provided on the vehicle body portion on the rear side of the towed portion. , The coaxial left and right shaft ends are laterally installed so as to project to the side of the vehicle body, and the left and right support parts are respectively provided on the left and right of the front edge of the luggage carrier so as to face each other vertically. Since a cylinder and a rod of the same cylinder are pivotally mounted between the left shaft end and the left support part and between the right shaft end and the right support part, respectively, it is stable even though it is a towed vehicle. The four-point support structure allows the loading platform to be tilted rearward, and allows the loading platform only to be tilted backwards relative to the vehicle body regardless of the state of the ground.

B. According to the same paragraph, the cylinder and the rod of the same cylinder are pivotally mounted between the left shaft end portion and the left support portion and the right shaft end portion and the right support portion that are vertically opposed to each other. When activating the cylinders for tilting the carriage back and back, the left and right cylinders themselves can make fine movements with the left and right shaft ends and the pivotal joints with the left and right supports as fulcrums. Backward tilting can be performed smoothly and reliably and there is no failure. In addition, the rearward tilting operation of the loading platform, with the wheels brake-locked, until the loading platform has finished tilting backwards,
Since it is sufficient to continue operating the left and right cylinders, the handling operation can be performed easily, easily and quickly.

C. According to the same paragraph, a cylinder and a rod of the same cylinder are pivotally mounted between the left shaft end and the left support, and between the right shaft end and the right support, which are vertically opposed to each other. Since only the loading platform can be tilted backwards,
Cylinders can be covered with medium output and medium weight, and since the mounted cylinders are medium weight, it is possible to minimize the reduction of the loading load and solve the problem of reduced transport capacity. Can contribute.

D. According to the present invention, since the vehicle body is provided with the lock element having the engaging claw portion that can be engaged with and disengaged from the engaged portion of the luggage carrier, the luggage carrier is mounted on the vehicle body in a state where the luggage carrier is not tilted backward while traveling. It can be locked as a unit, and the cargo bed will not lean back backward.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a towed vehicle for cargo of the present invention.

FIG. 2 is a partially enlarged side view.

FIG. 3 is a partially enlarged plan view.

FIG. 4A is a partially enlarged perspective view. FIG. 4B is a partially enlarged front view of the part A in FIG.

FIG. 5A is a partially enlarged perspective view of a lock element.
FIG. 7A is a partially enlarged perspective view of a state where the lock by the lock element is released.

FIG. 6 is a partially enlarged plan view of the locking element.

FIG. 7 is a side view showing a conventional towed vehicle.

[Explanation of symbols]

1 vehicle body 1a high-floor vehicle body portion 1b low-floor vehicle body portion 1c vertical intermediate vehicle body portion 2 kingpin 3 loading platform 4 shaft 5 support shaft 5a left shaft end portion 5b right shaft end portion 6 left support portion 7 right support portion 8, 9, 11 Cylinder 8a, 9a Rod 10 Walk plate 12 Lock element 13 Engagement part of loading platform 14 Engaging claw part of lock element 15 Rotating shaft of lock element 16 Lock element joint 17 Lock element air chamber

Claims (2)

[Claims] 1. A towed portion is formed near a front end of a vehicle body, and a load platform is supported on a rear side of the towed portion so as to be tiltable rearward.
A support shaft is laterally installed on the vehicle body portion on the rear side of the towed portion such that the coaxial left shaft end portion and right shaft end portion project laterally of the vehicle body, and left support portions are provided on the left and right of the front edge of the luggage carrier. And a right support portion projecting from each other, and a cylinder and a rod of the same cylinder are pivotally mounted between the left shaft end portion and the left support portion and the right shaft end portion and the right support portion which are vertically opposed to each other. A towed vehicle for freight that is characterized by: 2. The towed vehicle for cargo according to claim 1, wherein the vehicle body is provided with a locking element having an engaging claw portion that can be engaged with and disengaged from an engaged portion of a luggage carrier.