JPH0535876Y2 - - Google Patents

Description

[Detailed explanation of the invention] Technical field This invention is based on the deck surface of the vehicle body on which cargo is loaded,
The present invention relates to a loading platform device for a truck, which includes an opening/closing door surrounding the deck surface, and the door is pivotally connected to the vehicle body so as to be openable and closable.

BACKGROUND ART The above-mentioned type of loading platform device is well known in the past, and is configured such that the opening/closing door is normally closed and the opening/closing door is opened when loading and unloading cargo to facilitate loading and unloading operations.

However, when loading and unloading particularly large or heavy loads onto the deck surface, it often requires a great deal of effort even if the opening/closing door is opened.

Therefore, it has been conventional practice to use a luggage lifting device that can automatically raise and lower luggage using a power lift attached to the opening/closing door, but this device is expensive and cannot be easily installed on the opening/closing door. The problem is that it is a bit too large-scale.

It is also common practice to load and unload cargo using a forklift, but it is cumbersome to prepare a forklift each time, and the forklift itself is expensive and requires a skilled person to operate it. There was also a problem.

Purpose The purpose of the present invention is to eliminate the above-mentioned conventional drawbacks and to provide a truck loading platform device that can load and unload cargo onto a deck surface with an extremely simple configuration.

Configuration In order to achieve the above object, the present invention supports a loading/unloading roller on the end face of the opening/closing door, which becomes the lower part of the opening/closing door when the opening/closing door is closed, in the truck loading platform of the type described at the beginning. With,
A roller rotation direction control device is provided for regulating the rotation direction of the roller so that the roller can rotate only in one direction or the other direction, and the rotatable direction can be switched. A cover that forms a stepped portion in which the roller is housed when the opening/closing door is closed, and also covers the roller housed in the stepped portion and hides the roller from the outside when the opening/closing door is closed. The present invention provides a configuration in which a portion is provided on the opening/closing door.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Figure 1 is a side view of the truck, Figure 2 is a rear view of the truck from the rear, and Figure 3 is a side view of the truck.
It is a - line enlarged sectional view of a figure. The truck shown here is provided with a loading platform device 2 at the rear of its cab 1. The cargo platform device 2 has a deck surface 3 of a vehicle body on which cargo is loaded, side walls 4 surrounding both sides of the deck surface 3, and an opening/closing door 5 surrounding the rear part of the deck surface.

The opening/closing door 5 is pivotally connected to the vehicle body 7 via a hinge 6 provided in its lower region so as to be openable and closable, and is normally closed to surround the deck surface 3 as shown in the figure. When loading and unloading cargo, the door 5 can be unlocked and opened by rotating the door 5 in the direction indicated by arrow A in FIG. FIG. 4 shows the state when the opening/closing door 5 is opened.

As shown in FIG. 5, rollers 9 for loading and unloading cargo are rotatably supported on the end face 8 of the door, which becomes the lower part of the door when the door is closed, as shown in FIG. That is, a pair of bearing brackets 10, 10a are attached to bolts 11, 11a on the end surface 8 of the opening/closing door.
These brackets 10, 10 are fixed by
The shaft 14 of the roller 9 is rotatably supported at the shaft a.

A step 15 is formed in the vehicle body behind the deck surface 3, as shown in FIG. A cover part 30 is provided on the opening/closing door 5 to cover the roller 9 housed in the part 15 and hide the roller 9 from the outside. Therefore, when the door 5 is closed, the roller 9 is not exposed to the outside.
Deterioration in appearance due to the provision of the roller 9 can be prevented. Also, since the roller 9 is housed in the stepped portion 15,
The rollers 9 do not interfere with the cargo on the deck surface 3.

Furthermore, as in the illustrated example, if a sealing rubber 16 is fixed to the lower part of the deck surface side of the opening/closing door 5, and the tip of this rubber 16 is pressed against the deck surface 3 when the opening/closing door is closed, the roller 9 can be secured more securely. can be hidden.

When the door 5 is opened as shown in FIG. 4, the roller 9 is exposed facing upward. There, the load 17 to be unloaded is placed on the roller 9, and the load 17 is unloaded while rolling the roller 9 and moving the load 17 in the direction of arrow B or C. Therefore, even if the baggage is large and heavy, it can be easily handled by a small number of people, and the inconvenience of damaging the baggage can be prevented. Previously, the cargo had to be moved and unloaded by rubbing it against the rearmost edge of the deck surface or the corner of the opening/closing door, which required a great deal of effort. With this configuration, the load 17 can be placed on the rollers 9 and unloaded while rotating the rollers 9, so the load can be moved with a small force.

In order to ensure that the luggage 17 can be placed on the rollers 9, when the opening/closing door 5 is opened as shown in FIG. It is desirable to arrange the roller 9 so that it protrudes from the side.

Further, when the opening/closing door 5 is configured to be held in a substantially horizontal state as shown in FIG.
If the roller 9 is arranged so that it projects slightly above the inner surface 18 of the door 5 as shown by δ2, then
Loading and unloading work can be performed by placing cargo on the rollers 9 while keeping the opening/closing door 5 in a horizontal state.

If a soft material such as rubber is laminated on the surface of the roller 9, it is possible to more reliably prevent damage to the cargo during loading and unloading.

Here, the roller 9 can be supported so that it can rotate freely in any direction, but in the present invention, the roller 9 can be supported so that it can rotate only in one direction or the other direction, and the rotatable direction can be switched. A roller rotation direction control device is provided for regulating the rotation direction of the roller so that the rotation direction of the roller can be controlled. This makes it easier to load and unload cargo. For convenience, illustration of the above-mentioned roller rotation direction control device is omitted in FIGS. 3, 4, and 6. Figures 5 and 7 a, b
A specific example of this control device is shown below.

As shown in FIG. 5, a ratchet wheel 19 is attached to a portion of the shaft 14 protruding from one of the pair of brackets 10, 10a that supports the shaft 14 of the roller 9, as shown in FIG. 7a. is fixed. Further, an arm 20 is supported on the shaft 14 so as to be rotatable relative to the shaft 14, and a pole 21 is pivotally attached to the tip of the arm 20 via a pin 22. The bracket 10 has an arcuate guide hole 23 centered around the axis of the shaft 14, into which a pin 22 is slidably fitted.

As shown in FIG. 7b, there are also a ratchet wheel 19a, an arm 20a, and a pole 21 on the other side of the bracket 10a.
a, a pin 22a and a guide hole 23a are provided, and these are the same as in the case of Fig. 7a, except that they are arranged symmetrically with respect to each element shown in Fig. 7a. .

The operation of the roller rotation direction control device configured as described above is as follows.

First, as shown by arrow B in Figure 4, the baggage 17
When lifting it onto the deck surface 3, the arm 20 and pawl 21 shown in FIG. On the other hand, the arm 20a and pawl 21a shown in FIG. 7b are held at the positions shown by chain lines in the same figure, and the pawl 21a is removed from the teeth of the ratchet wheel 19a. That is, the roller 9 is moved by the pole 21a.
This ensures that the rotation of is not restricted at all.

Since the pawl 21 is engaged with the teeth of the ratchet wheel 19, even if an attempt is made to rotate the roller 9 clockwise in FIG. 7a and FIG. , rotation of the roller 9 is prevented. However, when rotating the roller 9 in the counterclockwise direction in FIGS. 7a and 4, the pole 2
1 slides on the toothed surface of the ratchet wheel 19, the roller 9 can freely rotate in this direction. That is, the roller 9 can only rotate counterclockwise.
Therefore, the cargo 17 shown in FIG. 4 is placed on the deck surface 3.
When pushing the object in the direction of arrow B to lift it, the rollers 9 rotate freely, reducing the lifting effort. On the other hand, since the rollers 9 do not rotate in the opposite direction, Even if the push-up force is released midway, the load will stop in its current state and will not fall in the direction of arrow C. This way, you can easily stack your belongings.

Conversely, when lowering the luggage 17 from the deck surface 3,
Remove the pawl 21 shown in FIG. 7a from the teeth of the ratchet wheel 19, and while sliding the pin 22 into the guide hole 23, bring the arm 20 to the position shown by the chain line to release the rotational restraint of the roller 9 by the pawl 21. do. On the other hand, insert the pin 22a shown in FIG. 7b into the guide hole 23.
The arm 20a is brought to the position indicated by the broken line in the figure while sliding the pawl 21a into the teeth of the ratchet wheel 19a. As a result, the roller 9 is allowed to rotate in the clockwise direction in FIG. 4, but is prohibited from rotating in the counterclockwise direction.
This can be lowered while easily moving it in the direction of arrow C.

Note that the arms 20, 20 shown in FIGS. 7a and 7b
a and poles 21, 21a as solid lines (or broken lines)
The arms 20, 20a, etc. may be held at the positions indicated by the chain lines by their own weight, but they may be held at their respective positions by spring force using springs (not shown). It is also advantageous to configure it as such.

The embodiment in which the present invention is applied to the opening/closing door 5 provided at the rear of the deck surface has been described above, but when the side wall 4 on the side of the deck surface is configured as a door that can be opened and closed with respect to the vehicle body, It goes without saying that the present invention can also be applied to.

Effects According to the present invention, it has become possible to easily load and unload cargo onto the deck surface with an extremely simple configuration. In particular, a roller rotation direction control device has been installed, so even if the push-up force on the cargo is released midway through the loading process, the cargo can be stopped in the current state, preventing the cargo from falling downward. This greatly improves the efficiency of loading cargo. In addition, when the door is closed, the rollers are housed in the stepped part of the vehicle body and are hidden by the cover of the door, which prevents the appearance of the truck from deteriorating. This can also be prevented.

[Brief explanation of the drawing]

FIG. 1 is a side view of the truck, FIG. 2 is a rear view of FIG. 1, and FIG. 3 is an enlarged sectional view taken along the - line in FIG. 2, with the roller rotation direction control device omitted.
Figure 4 is a sectional view similar to Figure 3 when the door is opened, and Figure 5 is a view of the door seen in the direction of arrow V in Figure 4, with some elements omitted. Figure, 6th
The figure shows the opening/closing door in an almost horizontal position.
7a is a sectional view similar to FIG. 3, FIG. 7a is a view taken in the X-ray direction of FIG. 5, and FIG. 7b is a view taken in the Y-Y direction of FIG. 2... Loading platform device, 3... Deck surface, 5... Opening/closing door, 7... Vehicle body, 8... End face of opening/closing door, 9... Roller, 15... Step portion, 30... Cover portion.

Claims (1)

[Scope of Claim for Utility Model Registration] In a truck loading platform device comprising a deck surface of a vehicle body on which cargo is loaded and an opening/closing door surrounding the deck surface, the door being pivotally connected to the vehicle body so as to be openable and closable. , a roller for loading and unloading cargo is supported on the end surface of the opening/closing door which becomes the lower part of the opening/closing door when the opening/closing door is closed, and the roller is configured to rotate only in one direction or the other direction; A roller rotation direction control device that regulates the rotation direction of the roller is provided so that the direction can be changed, and when the opening/closing door is closed, a roller rotation direction control device is provided on the vehicle body portion behind the deck surface.
The opening/closing door is further provided with a covering part that forms a stepped part in which the roller is housed, and also covers the roller housed in the stepped part and hides the roller from the outside when the opening/closing door is closed. A loading platform device.