JPH04201638A - Elevation step for load carrying platform of truck - Google Patents

Abstract

PURPOSE:To allow a foot placing surface part to be formed when a door is opened, by forming the foot placing surface part which is accommodated in flat form on the inner surface of the door when the door is closed and projects at right angle for the door surface when the door is opened and an engagement part for the foot placing surface part, on the inner surface of the opening/closing door on the load carrying platform of a truck. CONSTITUTION:Elevator steps 6 and 6 are installed on the opening/closing door 3 on the load carrying platform 2 of a truck 1, and an elevator step 7 is installed on the opening/closing doors 4 and 5. A pair of slide holders 12 are formed in the vertical direction on the inner surface of the door 3 (the doors 4 and 5 are omitted because of the similar state), and the T-figure part 14 of an arm 11 is engaged in slidable manner in the slot 13 of the slide holder 12. One side edge of a foot placing surface part 8 is installed in turnable manner at the other edge of the arm 11, and the other side edge of the foot placing surface part 8 is installed on the inner surface of the door 3 by a butterfly valve 10. With this constitution, when the door is closed, the T-figure part 14 of the arm 11 is slid in the holder 12 by the dead weight of the foot placing surface part 8, and folded on the inner surface of the doors 3-5, and superposed. When the door is opened, the T-figure part 14 is opened on the contrary, and set to a foot placing enabled attitude.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a step for going up and down to the loading platform of a truck, and in particular, when the loading platform door is closed, the step is stored substantially flat on the inner surface of the door so as not to interfere with cargo loading. When the door is opened, a footrest surface is formed approximately 90'' from the inner surface of the door, that is, approximately horizontal to the ground.

(Background of the Invention and Conventional Disadvantages) In general, a truck for carrying cargo has a loading platform with a large area, and this loading platform usually has three directions on the rear left and right sides or one direction at the rear of the loading platform facing downward, that is, toward the ground. It has a door that opens vertically. This loading platform is usually set at 80 CI 111 for trucks with a small ground clearance, and about 150 am for large trucks. When loading and unloading cargo on such a truck, or when attempting to climb onto the loading platform, the height of the loading platform poses an obstacle, resulting in extremely poor workability. In other words, when a normal adult performs the above-mentioned work, whether on the ground or on a loading platform, their weight balance is always unstable, they are forced to work in poor footing, and they are unable to use their strength. This method has the disadvantage of consuming unnecessary labor. Also, when going up to the loading platform, the above 80 = 150 cm
The ground clearance of the car is too high for you to put your feet on the loading platform, and you have to get help from others or put your feet on a slight bulge at the risk of getting up. It was a huge labor burden.

In view of these circumstances, some models have been proposed with ladder-like lifting steps formed at the bottom of the loading platform, but although these ladder-like lifting steps are effective when the platform door is closed, they are not effective when the door is opened. , because the door rotates 180' and hangs down, which has the disadvantage that the ladder-like steps are hidden by the door when opened.

(Object of the Invention) The present invention solves the above-mentioned drawbacks, and when the door is closed, the cargo is stored approximately flat on the inner surface of the lungs so as not to obstruct the loaded cargo, and when the door is opened, it is stored approximately 90 degrees with respect to the inner surface of the door, that is, on the ground. It is an object of the present invention to provide a platform lifting/lowering step for a truck □ that is configured to form a good footrest surface that is substantially horizontal to the truck.

In addition, as necessary, the present invention can, in principle,
An object of the present invention is to provide a loading platform lifting/lowering step for a truck, which is stored substantially flat on the inner surface of the door when the door is closed, and automatically forms a footrest surface at an angle of approximately 90 degrees to the inner surface of the door when the door is opened. shall be.

(Detailed Description of the Invention) A first embodiment of the present invention will be described in detail below with reference to FIGS. 1 to 3 of the drawings. In the figure, l indicates a track. This truck l has a loading platform 2, and this loading platform 2
There are doors 3 and 4 that can be opened by rotating 180'' downwards, that is, perpendicularly to the ground, in three directions: rear, left and right.
．． 5 is installed. 6.7 shows the platform lifting/lowering steps. Of these two types of loading platform lifting/lowering steps, 6 is constructed with a relatively narrow width, and there are 1 on each side of the rear door 3.
They are installed one by one. Another loading platform lifting step 7
The left and right doors 4. are relatively wide.
One of each is attached over substantially the entire width of 5. In the following description, the configuration will be explained in detail using the loading platform lifting step 6 attached to the rear #3 as an example. Each of the platform lifting/lowering steps 6 has a footrest surface 8 and a locking section 9 for locking the footrest surface 8. The footrest surface part 8
is formed of a metal plate, and is housed almost flat on the inner surface of #3 when the door 3 is closed, as shown in FIG. 3(a), and when the door 3 is open, as shown in FIG. 3(b). As shown in the figure, it is rotatably attached to the door 3 using a hinge fitting 10.10 so as to rotate relative to the door surface.

The locking part 9 has a locking arm 11.11 formed of a metal rod-shaped body and a slide holder 12.12. The slide holder 12 has a hollow interior, and a slot 53 extending substantially over its entire length is formed on the front surface. One end of the locking arm 11.14 is rotatably attached to the tip edge of the footrest surface 8, and the other end is provided with a 1-shape having a width wider than the width of the slot 13 of the slide holder 12. A portion 14 is formed to be located within the slide holder 12. Furthermore, the locking arms 11.11 of this locking portion 9 are designed so that when #3 is released, the footrest surface portion 8 stops at a position approximately 90' with respect to the #3 surface, as shown in FIG. 3(b). In other words, the length is set so that rotation is restricted. Furthermore, 15.1
5 is a spacer.

This spacer 15.15 is a height adjusting component for storing the footrest 8 substantially flat when the door 3 is closed, and is formed at a height such as between the slide holder 12 and the passageway. 1
6 is a rubber plate. This rubber plate 16 is provided to protect the cargo on the loading platform when #3 is closed, and is attached to substantially the entire back surface of the footrest surface 8.

Next, the operation of the above embodiment will be explained. When the door is closed, the load platform lifting step of the present invention is stored substantially flat on the inner surface of the door, as shown in the load lifting step 7 attached to the door 5 in the closed state in FIG. 1 and as shown in FIG. 3(a). be done. In other words, the footrest 8 of the platform lifting step 6 is rotatably attached to the door 3 and has its own weight, so the 1-shaped portion 14 at the tip of the locking arm 11 is attached to the slide holder 12.
The container slides inside the container and is folded to be stored in a substantially flat state. On the other hand, when the door is opened, as shown in FIGS. 2 and 3 (b), the foot rest surface 8
is fixed at an angle of approximately 90@ with respect to the #3 surface, thereby forming a loading platform elevating step 6. That is, when the door 3 is opened, it rotates 180@ and hangs down approximately perpendicularly to the ground. At this time, the footrest 8 is rotatably attached to the door 3 and has its own weight, so it automatically opens. At the same time, the 1-shaped portion 1 at the tip of the locking arm 11
4 also slides inside the slide holder 12, stops moving at the lower end of the slot 13, and locks and fixes the footrest 8 to the door 3 at an angle of approximately 90°. The platform lifting step 6 is formed by the above-described operation.

Next, a second embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5 of the drawings, but the same parts as in the first embodiment will be given the same reference numerals and their explanation will be omitted. . In the figure 2
0 indicates a platform lifting/lowering step. This loading platform lifting step 2
0 has a footrest surface part 21 and a locking part 22. The footrest surface portion 21 is formed of a metal plate, and has letter 1 portions 14 formed on the left and right edges of the footrest surface portion 21 . Further, the locking part 22 is rotatably attached to the other edge by a hinge part 23. 12.12 is a slide holder, 1
3.13 is a slot formed on the front surface of this slide holder 12. 1 character part 1 of the footrest surface part 21
4 is configured to be located within this slide holder 12, similar to the first embodiment described above. The locking portion 22 is formed of a metal plate, and the footrest surface portion 2
The edge on the side not connected to 1 is rotatably attached to the door 3 via a spacer 15 by a hinge portion 24. A rubber plate 16 is attached to substantially the entire surface of the locking portion 22. The operation of the first embodiment is such that the inside of the slide holder 12 is
4 slides to approximately 90 degrees to the n3 surface.
'', but in this embodiment, the T-shaped part 14 formed at the edge of the footrest surface 21 moves within the slide holder 21, thereby forming a footrest surface 8 against the door 3 surface. A footrest surface portion 21 having an angle of approximately 90° is formed.Other operations are the same as those of the first embodiment, and therefore their explanation will be omitted.

Next, a third embodiment of the loading platform lifting/lowering step in the truck of the present invention will be described in detail with reference to FIG. 6 and FIG. 7 of the drawings. The explanation will be omitted. In the figure, 30 indicates a platform lifting/lowering step. This loading platform lifting/lowering step 30
and a locking portion 32.32. The footrest surface 31
is formed of a metal plate, and is rotatably attached to the door 3 by hinges 33, 33. The locking parts 32, 32 are formed of metal plates, and are rotatably attached to the door 3 by hinge parts 34,34. Further, the locking portions 32, 32 are provided to lock the footrest surface portion 31 from below at a position having an angle of approximately 90° with respect to the n3 plane when 63 is released.
It is attached to the door 3 at a predetermined angle so that when #3 is closed, the door 3 is automatically folded substantially flat against the door 3 due to its own weight. 35.35 is a stopper. This strike,
Par 35.35 is the locking part 32°3 when the door 3 is opened.
2 is provided to prevent the feet from opening beyond a predetermined angle, that is, from opening beyond the width of the footrest surface portion 31. A rubber plate 16 is attached to substantially the entire back surface of the footrest surface 31.

Next, the operation of this embodiment will be explained. First, when the door 3 is closed, it is stored substantially flat on the inner surface of the door 3, as shown in FIG. 7(a). That is, the footrest surface part 31 and the locking part 32.3
2 are rotatably attached to the door 3, so they each act to be folded under their own weight, so that they are stored substantially flat. On the other hand, if door 3 is opened, the 6th
As shown in the figure and FIG. 7(b), the engaging portion 32.32 opens due to its own weight until it is regulated by the stopper 35.35. At the same time, the footrest surface part 31 also rotates due to its own weight, and when it becomes an angle of approximately 90'' with respect to the 83rd surface, the locking part 3
Rotation is restricted by 2.32. The platform lifting/lowering step 30 is formed by the above-mentioned action. In the explanation of the above embodiments, the foot resting surface part and the locking part are automatically formed by their own weight. The configuration is not limited to this, and may be formed by manual operation.

Further, in order to ensure automatic appearance due to its own weight, weights may be placed at appropriate positions. Furthermore, a locking member such as a clamping stopper or a magnetic stopper may be added to prevent the container from wobbling during storage. In addition, although we have described an example in which a rubber plate is attached to the back of the footrest to protect the cargo on the loading platform when stored, the invention is not limited to this, and it may be made of a relatively flexible material such as a plastic plate or plywood. Any material may be used. Furthermore, in cases where there is no particular need, this rubber plate may be omitted.Also, in order to make the loading platform completely flat against the door surface when the door is closed, the loading platform lifting step of the present invention may be placed on the door surface. It may be buried in the door or placed between the ribs of the door, or in the case of a truck bed equipped with a wooden load protection plate, the load protection plate may be divided and installed between them. .

(Effects of the Invention) As is clear from the above explanation, according to the loading/unloading step in the truck of the present invention, it can be attached to the inner surface of the opening/closing door of the truck loading platform, and can be stored substantially flat on the inner surface of the door when the door is closed. Because of this structure, it does not go against the original purpose of loading and transporting cargo, that is, it does not get in the way of cargo loading, and when the door is opened, the footrest surface formed by a flat plate A lifting step consisting of a locking part that firmly locks this footrest is formed between the ground and the loading platform, so when loading cargo, work by placing your feet on the footrest of this lifting step. In other words, by forming a good foothold, the weight balance is stabilized, and it is easier to apply force to the load and work can be carried out safely without wasting any wasted effort. be. This lifting step also has the effect of making it possible to move up and down to a higher loading platform very easily and naturally.

In particular, as shown in the embodiment, if the footrest is automatically formed by the weight of the lifting step itself, it becomes approximately flat when the door is closed and rotates approximately 90 degrees when the door is opened, resulting in an extremely simple configuration. However, the user does not have to perform the same operation, and the lift step automatically appears only when necessary.

In particular, in the embodiment of the chest 1, the position where the lifting step is formed can be formed at a position close to the bottom of the door when the door is open, that is, at a position approximately halfway between the loading platform and the ground, or at a position lower than the middle. Therefore, it also has the effect of becoming an extremely easy-to-use lifting step.

Furthermore, in some types of trucks, a wooden board with a thickness of about 2cT11 is attached to the entire inner surface of the cargo bed door, but since the lifting step of the present invention is also stored substantially flat on the inner surface of the door, the above embodiment is not applicable. As shown, by suitably applying the steps of the present invention, such as increasing the lateral dimension or adding a relatively flexible protective member such as a rubber plate or plastic plate to the back surface of the footrest, the whole of the plate material can be Alternatively, it also has the effect of making it possible to omit a part of it.

[Brief explanation of the drawing]

Figures 1 to 3 show a first embodiment of a loading platform lifting step in a truck according to the present invention, with Figure 1 being a perspective view showing an example installed in a truck, Figure 2 being an enlarged perspective view, and Figure 3 Figure (a) is a side view showing the door closed, Figure (b)
FIG. 2 is a side view showing a state in which the door is opened. 4 and 5 show the second embodiment, FIG. 4 is an enlarged perspective view, FIG. 5(a) is a side view showing the door closed, and FIG.
b) is a side view showing a state in which the door is opened. 6 and 7 show the third embodiment, FIG. 6 is an enlarged perspective view thereof, and FIG. 7(a) is a front view showing a state in which the door is closed.
(b) is a front view showing a state in which the door is opened. 1... Truck, 2... Loading platform, 3. 4. 5... Door (opening/closing door), 6,
7. 20. 30... Loading platform lifting step, 8
．． 21.31... Footrest surface part, 9.22.32.
...Locking part, 11.11 ...Latching arm, 12.12 ...Slide holder, 16...-
...Rubber plate. Patent applicant Matsuo Kogyosho Co., Ltd. Figure 1

Claims (1)

[Claims] It is attached to the inner surface of the opening/closing door of a truck bed, and when the door is closed, it is stored almost flat on the inner surface of the door, and when the door is open, this foot rest surface is locked to the foot rest surface that has an angle of approximately 90 degrees to the door surface. What is claimed is: 1. A loading platform lifting/lowering step for a truck, characterized in that a locking portion is formed therein.