JP3172130B2 - Loading platform tilting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier moving / tilting apparatus used for loading and unloading cargo in a truck.

[0002]

2. Description of the Related Art Heretofore, when loading / unloading cargo in a lorry, a body-sliding type carrier moving / tilting device for tilting and sliding a carrier has been used. For example, Japanese Utility Model Publication No. 55-10176 discloses a carrier moving and tilting device capable of facilitating the loading and unloading of cargo, and a truck equipped with such a device is excellent in the efficiency of loading and unloading and is highly evaluated. I have received it.

However, when loading and unloading cargo using the above-described carrier moving / tilting device, it is necessary to incline and move the carrier to a predetermined position where the carrier is in contact with the ground, and it is necessary to always secure a constant work place. is there. For this reason, there is a disadvantage that it cannot be used in a place where the work place is narrow.

If the amount of movement of the carrier to the rear of the vehicle body is reduced so that it can be used even in a small work place, the inclination of the carrier may become steep, and the inclination of the carrier may become steep. There has been a long-felt need for a bed-moving and tilting device that can be used in places.

[0005] Further, depending on the type of cargo loaded on the carrier, there may be a case where a carrier moving / tilting device with a smaller inclination angle of the carrier, such as a carrier moving / tilting device conventionally used in a wide place, is required. There has been a demand for a bed moving / tilting apparatus that can make the inclination angle of the bed more gentle.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a carrier moving / tilting apparatus which can be used not only in a wide work area but also in a narrow work area.

Another object of the present invention is to provide a carrier moving / tilting apparatus having a gentler carrier inclination angle.

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a carrier moving / tilting apparatus according to the present invention is a carrier moving / tilting apparatus for moving and tilting a carrier of a truck along a rail. one that enables adjusting the amount
Yes, the inclination of the carrier is centered on the base axis at the rear of the chassis.
At the same time as the rails
The amount of movement of the carrier to the rear of the vehicle,
Desired movement amount within the range of the set maximum movement amount and minimum movement amount
It is characterized in that it is configured to be adjustable.

In the above-mentioned or the following loading platform moving / tilting apparatus, a supporting leg protruding downward is provided at a rear portion of the rail, and the projecting amount of the supporting leg is adjusted according to the backward moving amount or the inclination angle of the loading platform. It is characterized by having such a configuration.

[0010] In addition, the carrier moving / tilting apparatus according to the present invention includes:
In a truck moving and tilting device for moving and tilting a truck of a lorry along a rail, a rear portion of the vehicle body is lowered when the truck is tilted.
Center of gravity at the rear of the sea
Therefore, it is made by tilting with the rail,
And the suspension on the rear wheel side, and tilt the rail
By linking the contraction of the suspension with
Characterized in that it is configured to lower the rear part of the vehicle body
You.

[0011] Further , the era moving tilt device of the present invention is a
Cargo bed that moves and tilts the car carrier along the rail
In the moving tilt device, the tilt of the loading platform is after the chassis.
Around the base axis of the part
It is made by tilting with the rail, the rail and the rear wheel
Side suspension and the rail tilt and the suspension
By linking the contraction of the pension, the rear
And lowering the loading platform to the rear of the vehicle.
Set the movement amount within the range of the set maximum movement amount and minimum movement amount.
It is characterized in that it can be adjusted to a desired movement amount.

Further, in the above-mentioned loading bed moving / tilting apparatus,
The connection between the rail and the rear wheel side suspension
It is characterized by being made through the ear, for example
By connecting the axle cover of the rear wheel and the rail with a wire, the suspension is automatically contracted in conjunction with the inclination of the carrier when the carrier is inclined .
You.

According to the above configuration, the moving amount of the carrier is the maximum.
Adjusting to a desired movement amount that is halfway between the amount and the minimum movement amount
And the amount of protrusion of the support legs is the amount of rearward movement or inclination of the carrier.
It is adjusted according to the degree, so that the amount of rearward movement of the rails and carrier can be adapted to the size of the work place ,
Improves the stability of the sloping platforms and rails,
The safety of loading or unloading work can be ensured. In addition, the tilt of the rail and the contraction of the suspension
As the rear of the car body moves down by interlocking, it breaks down at low cost
The angle of inclination of the loading platform can be made gentler with a simplified structure having a small number of components . Also, the loading platform based on the change in the center of gravity
The tilting of
The stability of forward movement and return operation is improved, and cargo loading or
Or the safety of loading and unloading work is ensured.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on specific embodiments, but the present invention is not limited to such embodiments.

As shown in FIG. 1, the carrier moving / tilting apparatus according to the present embodiment includes a rail 1 supported by a base shaft 4 at a rear portion of a chassis 3 of a truck, a carrier 2 fitted and installed on the rail 1, A support leg 8 formed at the rear of the rail 1 and protruding downward, a balance cylinder 6 connecting the chassis 1 to the rail 1 at the rear of the chassis 3 and forward of the base shaft 4, and a wire 9 connecting the rail 1 to the chassis 3 Consists of

The rail 1 is provided in parallel with the longitudinal direction of the chassis 3, is supported by a base shaft 4 via a rail support 7, and is provided in front of the base shaft 4 and has a buffer function. By being connected to the cylinder 6, it can be rotated slowly. And rail 1
Is the chassis 3 between the base shaft 4 and the balance cylinder 6.
Is connected to the rear of the vehicle by a wire 9.

The carrier 2 has a fitting portion 2 formed at the bottom thereof.
a, the front roller 5a is provided at the tip of the loading platform 2, and the center roller 5 is provided on the upper surface of the rail 1.
b and the rear roller 5c are mounted on the shaft.
It can slide back and forth on the top. At the bottom of the bed 2,
As shown in FIG. 2, a slide cylinder 10 is provided in the longitudinal direction of the chassis 3, the leading end of the slide cylinder 10 is provided at a rail mounting portion 11 provided between the rails, and the trailing end thereof is provided at a rear end portion of the bottom of the loading platform 2. It is connected to the rail 1 and the loading platform 2 via the portion 12, and the loading platform 2 slides on the rail 1 as the slide cylinder 10 expands and contracts.

As shown in FIG. 3, a jack cylinder 13 is attached to the support leg 8, and the amount of protrusion of the protrusion 8a of the support leg 8 changes as the jack cylinder 13 expands and contracts. Jack cylinder 13
Is configured to extend and contract in accordance with the amount of backward movement of the bed 2 or the angle of inclination by the hydraulic circuit described later. The amount of protrusion of the protruding portion 8a of the support leg 8 is determined by the degree to which the bed 2 is moved and inclined. Changes as appropriate.

As shown in FIG. 4, one end of the wire 9 is connected to an axle cover 14a on the rear wheel side via a U-bolt 15, and the other end is connected to the rail 1 via a projection 17 provided on the rail 1. It is fixed by the mounting portion 16.

The chassis 3 is floatingly supported by the rear wheel axle cover 14a or the like via a suspension not shown in FIG. 4. When the inclination of the platform 2 is steep, the chassis 3 is supported. The rail 1 is rotated clockwise about the base shaft 4 in FIG. 4 to exert a force in the direction of pulling up the rear wheel via the wire 9, the U-bolt 15, etc., whereby the suspension is contracted and the chassis is retracted. 3 moves down. Thereby, rail 1 and carrier 2
Angle of inclination can be reduced.

Here, a hydraulic circuit for linking each component of the above-mentioned carrier moving / tilting device will be described. FIG. 5 is a hydraulic circuit diagram showing an interlocking relationship between the slide cylinder 10, the jack cylinder 13, the balance cylinder 6, and the like of the above-mentioned carrier moving / tilting device.

The oil in the hydraulic circuit is sucked up from an oil supply source 18 by a pump 19 and supplied to the whole via switching valves 20 and 21 and a control valve 22. And the switching valve 2
By switching between 0 and 21, the flow of oil supplied to the whole is controlled. One end of the switching valve 21 is connected to a winch 31 for cargo.

The jack cylinder 13 is connected to a solenoid switching valve 24 and a control valve 23, and expands and contracts by switching the solenoid switching valve 24 to control the flow of oil. When a limit switch 26 described later is in an ON state, no oil flows to the solenoid switching valve 24, and the jack cylinder 13 is in a contracted state. Conversely, when the limit switch 26 is in the OFF state, the solenoid switching valve 24 is switched, oil flows in, and the jack cylinder 13 and the protrusion 8a of the support leg 8 extend to a predetermined position.

The slide cylinder 10 is connected to a hydraulic circuit via solenoid switching valves 25 and 27 and an adjusting valve 28, and the amount of expansion and contraction is controlled by switching the solenoid switching valves 25 and 27. Solenoid switching valve 25, 2
7 is switched in conjunction with the ON / OFF state of the limit switch 26, and the limit switch 26 has a sensor for detecting the amount of backward movement or the inclination angle of the carrier 2.

When the limit switch 26 is ON, a predetermined position such as the amount of rearward movement of the carrier 2 is detected by the above-mentioned sensor, the solenoid switching valves 25 and 27 are switched, and the extension of the slide cylinder 10, that is, the carrier 2
The backward movement of is stopped. When the limit switch 26 is in the OFF state, the solenoid switching valve 2
5 and 27 are switched in the opposite manner, the slide cylinder 10 is extended to the maximum, and the carrier 2 moves on the rail 1 to the rear.

The balance cylinder 6 is provided with an adjusting valve 2.
Connected to the hydraulic circuit via the control valves 9 and 30;
By controlling the flow rate of the oil at 0, it plays a role in slowing the forward / backward rotation of the carrier 2.

Next, a case where the above-mentioned carrier moving / tilting device is actually tilted will be described.

First, when the bed moving / tilting device is used in a wide place, the slide cylinder 10 is activated and extended while the limit switch 26 is kept OFF without operating the sensor. A backward pulling force acts on the carrier 2 by the power of the slide cylinder 10, and the rollers 5 a,
With the rotation of 5b and 5c, the rail moves horizontally backward along the rail 1. Since the rail 1 itself is connected to the base shaft 4 and the balance cylinder 6, it does not move in the horizontal direction. In this case, the horizontal and vertical movements of the carrier 2 are restricted by the fitting of the fitting portion 2a between the rail 1 and the carrier 2.

When the carriage 2 moves to the rear to some extent, the carriage 2 moves backward and tilts due to the weight of the carriage 2 itself or the combined weight of the carriage 2 and the cargo. That is, when the moment applied to the rear of the base shaft 4 with respect to the base shaft 4 becomes a constant value, the carrier 2 tilts. At this time, the balance cylinder 6 plays a role of buffering a sudden tilting operation.

When the sensor is used in a wide place, the sensor does not operate through the movement and tilting operation of the carrier 2 and the limit switch 26 is kept in the OFF state. Extend until it stops running. Therefore, the bed 2 moves to the rearmost position and tilts until its rear end touches the ground. At the same time, the operation of the solenoid switching valve 24 activates the jack cylinder 13 of the support leg 8, and the jack cylinder 13
The projection 8a of the support leg 8 protrudes with the extension of the support leg 8. The protrusion amount of the protrusion 8a is set in accordance with the maximum movement amount and the inclination of the carrier 2.

At this time, a pulling force is automatically applied to the wire 9 by the inclination of the loading platform 2 to pull the wire 9 connecting portion of the rail 1 downward, and simultaneously pull up the axle cover 14a at the other end. Due to the suspension of the axle cover 14a, the rear part of the chassis 3 becomes
Can be lowered. Therefore, the inclination angle of the bed 2 becomes gentle.

When the loading bed moving / tilting device is used in a narrow place, a sensor provided at a predetermined position is operated to activate and extend the slide cylinder 10.
Initially, the limit switch 26 is in an OFF state, but when a sensor provided at a predetermined position detects the backward movement or the inclination angle of the carrier 2, the limit switch 26 is turned ON. Accordingly, the backward movement amount and the inclination angle of the carrier 2 at the predetermined position are regulated.

Then, at the same time that the rear end of the loading platform 2 is grounded, the support legs 8 designed for the predetermined position are also grounded. At this time, the jack cylinder 13 does not start, and the projecting portion 8a of the support leg 8 does not project.

In this case, a stronger pulling force acts on the wire 9 than in the case where the carrier moving / tilting device is used in a wide place, and the rear portion of the chassis 3 is further lowered by the action of the pulling force. Therefore, the action of loosening the inclination angle of the bed 2 by the wire 9 becomes stronger.

Although the above description has been given of the case where the bed 2 moves to the minimum on the rail 1 and the case where the bed 2 moves to the maximum on the rail 1, the present invention is not limited to this. It is possible to realize the movement amount and the inclination in the middle between the maximum and the minimum by the adjustment of.

[0036]

According to the above-mentioned structure, the carrier moving / tilting device according to the present invention has an effect that it can be used not only in a wide work place but also in a narrow work place.

Further, there is an effect that the inclination angle of the bed moving / tilting device can be made gentler.

[0038]

[Brief description of the drawings]

FIG. 1A is a side view of a carrier moving / tilting device in a state where a support leg is not protruded. (B) is a side view of the carrier moving / tilting device in a state where the support legs are protruding.

FIG. 2 is a plan view showing a connection state between a rail and a slide cylinder.

FIG. 3 is an enlarged front view of a support leg.

FIG. 4 is an enlarged sectional view of a connection portion between the axle cover and the rail.

FIG. 5 is a symbol circuit diagram of a hydraulic circuit of the bed moving / tilting device.

[Explanation of symbols]

 Reference Signs List 1 rail 2 carrier 3 chassis 4 base shaft 6 balance cylinder 8 support leg 9 wire 10 slide cylinder 13 jack cylinder 14a: axle cover

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-8-2311 (JP, A) JP-A-2-128640 (JP, U) JP-A-62-292938 (JP, U) JP-A-7-92938 11439 (JP, U) Japanese Utility Model Hei 5-46566 (JP, U) Japanese Utility Model Hei 4-67135 (JP, U) Japanese Utility Model Hei 1-1115945 (JP, U) Japanese Utility Model Sho 55-10176 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60P 1/04 B60P 1/30-1/34 B60P 1/43

Claims (2)

(57) [Claims] 1. A carrier moving / tilting device for moving and inclining a carrier of a lorry along a rail, comprising:
It is rotatably supported by a rear base shaft, and is in front of the supporting portion.
Connected to a balance cylinder with a buffer function
Rails with rollers on top and move back and forth on the rails
A possible carrier, and a slide cylinder for moving the carrier
By the configuration consisting of, the inclination of the carrier is performed by tilting around the base axis of the rear portion of the chassis while being buffered together with the rail by the change in the center of gravity due to the movement, and the amount of movement of the carrier to the rear of the vehicle, The rail can be adjusted to a desired movement within a range between the set maximum movement and the minimum movement.
And the suspension on the rear wheel side, and tilt the rail
By linking the suspension and the contraction of the suspension
Lower the rear of the body and project downwards at the rear of the rail.
Protruding support legs are provided, and the amount of backward movement or tilt angle of the loading platform
A carrier moving and tilting device for adjusting the amount of protrusion of the support leg according to the degree . 2. A suspension for the rail and the rear wheel.
It is characterized in that the connection of the parts is made via wires
The carrier moving / tilting device according to claim 1, wherein