JP2535615Y2 - Auxiliary staircase for lorry - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application fields] The present invention relates to a refrigerator car, an insulated car, a chassis,
The present invention relates to an auxiliary stair for raising and lowering a carrier of a lorry such as a truck, and more particularly to a foldable auxiliary stair that can be pulled out only when used.

[0002]

2. Description of the Related Art When a lorry becomes large, the loading platform becomes high, and loading and unloading operations involving lifting and lowering with heavy luggage require heavy labor. However, since there is no special staircase device conventionally, it is strange. Using the rear bumper located within 150m from the front and rear of the vehicle within 12m in total length of security standards,
We used for stairs change. Alternatively, some of the rear bumper, which is a combination of only one stair that can be rotated by only 90 degrees and foldable, and has about two stairs, are known in part. However, the substitution or combination of the rear bumper has the following disadvantages. (A) Because it is a simple means, it is insufficient for safe ascent and descent,
Particularly recently, female drivers have entered the transportation industry, which is a serious drawback for the female driver. (B) In addition, changes in the security standards are being considered, and it is obligatory to put the rear bumper inside, so that it may not be possible to use the conventional rear bumper instead of steps.

[0003]

[Problems to be solved by the present invention] The present invention is based on the above-mentioned situation and provides an auxiliary staircase that can be easily stored and folded.
The purpose is to develop something that can be attached to old cars and new cars.

[0004]

The auxiliary staircase for a truck according to the present invention is provided with a storage frame in a space where a vertical material stands upright between a horizontal material of a cargo carrier and a chassis frame, and the storage frame has a secondary space. The vertical frame of the book is slidably fitted, a plurality of step plates are rotatably mounted on the vertical frame, and a link rod is mounted on the tip of each step plate, and the bottom frame and the upper and lower A four-bar mechanism is formed by the step plate and the link bar, and the support shaft is formed in a subarc shape on the vertical frame and the step plate which form a part of the four-bar mechanism, and the arc is formed on the vertical frame to which it is fitted. The locking piece having the fitting groove is interposed to form a staircase inclined at an appropriate angle, and at the time of storage, the staircase is folded to be freely stored.

[0005]

When loading / unloading the load, pull the handle and slide the bottom frame consisting of the vertical frame and the step board to pull it out, tilt it down about the support shaft, and at the same time, tilt the vertical frame and the step board and The step bar is opened to the vertical frame by deploying the four-bar mechanism consisting of the link bar. Then, at an appropriate angle at which the step board becomes horizontal, the superior arc of the vertical frame rotates and abuts against the inferior arc of the support shaft to stop the rotation. Can be safely loaded and unloaded. At this time, the left and right ends of the step board are supported by the vertical frame and the link bar, and the step is reliably supported. When the loading and unloading is completed, hold the handle and return to the upper side, rotate it based on the four-bar mechanism to make it folded, slide the vertical frame and put it in the storage frame, It is housed in the space where the vertical story stands upright, and it is safe to run without protruding outside.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a truck according to the present invention will be described below with reference to the drawings. In the present invention, first, as shown in FIG. 2, a vertical story stands between a horizontal story of a body carrier and a chassis frame. The storage frames 1a and 1b are provided here by utilizing the space provided.
The storage frames 1a and 1b are located at the rear end of the carrier at substantially the center of the vehicle body between the two vertical feeders.

Next, as shown in FIGS. 3 and 4, the storage frames 1a and 1b are provided with two vertically extending vertical frames 2a and 2b.
And a frame formed by the step plates 3a, 3b, 3c. By sliding the vertical frames 2a and 2b, the storage frame 1
A support shaft 6a is provided so as to be slidable inward and to pivot downward at the end of the drawer. That is, vertical frame 2
a, 2b and step plates 3a, 3b, 3c
a and 1b so as to be freely slidable, and can be deployed downward around the support shaft 6a when used. Reference numeral 8 denotes a locking projection attached to the vertical frames 2a and 2b.
Reference numeral a denotes a receiving piece at an inner portion of the receiving part, reference numeral 9b denotes a receiving piece at the entrance, and reference numeral 10 denotes a handle for pulling out.

Next, as shown in FIG. 4, the step plates 3a, 3b, 3c which are pivotally mounted on the vertical frames 2a, 2b have at least two upper plates 3a, 3 arranged at the uppermost and lowermost stages.
b, and if necessary, increase the number of stages corresponding to the third stage 3c. The step plates 3a, 3
The shafts b and 3c are rotatably mounted on the vertical frames 2a and 2b, and the shafts thereof are preferably rotated in the opposite direction to the vertical frames 2a and 2b when the frame is expanded downward. And automatically keeps the horizontal position. For example, as shown in FIG.
a is formed as a sub-arc having a degree of less than about a half circle, while a fitting groove 7a having a sub-arc of about 225 degrees is formed in the vertical frame 2a in which it is fitted.
Both can be rotated in a sliding contact state.

Further, step plates 3a, 3b, 3c have
As described above, the lower end is axially attached to the vertical frames 2a, 2b, while the front ends are provided with link rods 4a, 4b for connecting the step plates 3a, 3b, 3c. To form a four-bar mechanism, and a series of step plates 3a, 3b, 3c perform link motion according to rotation of a part of the mechanism. Then, locking pieces 5a, 5a are attached to a part of the four-bar mechanism, for example, the side of the uppermost step plate 3a.
b, the link rods 4a, 4b and the locking pieces 5a, 5b are engaged with each other at a fixed angle, further rotation is restricted, and an appropriate inclination angle as a stair is maintained ( (See FIG. 1). That is, the step boards 3a, 3b, 3c are
2b and the link rods 4a, 4a support the left and right ends,
A stable support structure that can withstand a large load, and a staircase of an appropriate angle is formed by a four-joint mechanism related to each other, and can be folded when turned in reverse.

Incidentally, the head ends of the vertical frames 2a, 2a are connected to the storage frames 1a,
1b, and a part of the vertical frames 2a, 2b is brought into contact with a locking frame 11 extending from the chassis frame to support the vertical frames 2a, 2b in the expanded state. It can be so.

Next, the operation of this embodiment will be described. In the case of transporting a load by a freezing car or the like, first, when unloading and unloading the load, first grasp the handle 10 of the step plates 3a, 3b, 3c.
The vertical frames 2a and 2b are slid from the storage frames 1a and 1b and pulled out toward the user. When the receiving pieces 9b disposed on the storage frames 1a and 1b and the vertical frames 2a and 2b are engaged, the vertical frame 2
a, 2b are rotated downward. Then, the vertical frames 2a and 2b rotate obliquely downward about the support shaft 6a, and when a part of the step plate is grasped and rotated accordingly, the four-bar mechanism is activated to operate the step plates 3a and 3b. 3b and 3c are linked to each other to be opened with respect to the vertical frames 2a and 2b.
a, 5b and a part of the four-bar mechanism are engaged and stop rotating.
Then, the vertical frames 2a, 2b are inclined in the oblique direction, and the step plates 3a, 3b, 3c that follow the vertical frames 2a, 2b.
Occurs, and several steps open outward are formed at the position where the step board maintains the horizontal position (see FIG. 1). Therefore,
The stairs can be used for loading and unloading cargo, and safe and reliable work can be performed even on a truck with a high platform. At this time, step plates 3a, 3b, 3c forming a four-bar mechanism
Is supported at its left and right ends by the vertical frames 2a, 2b and the link rods 4a, 4b, so that it is stably supported and is safe to climb with heavy luggage.

In addition, the vertical frames 2a and 2b are used not only for the locking pieces 5a and 5b of the four-bar mechanism, but also for the shafts of the step plates 3a, 3b and 3c mounted on the vertical frames 2a and 2b. , 6b, 6c are formed in a subarc of less than about half a circle, and the vertical frame
a, 2b formed a fitting groove with a good arc of about 225 degrees,
The rotation is restricted when the superior arc portion rotates and comes into contact with the inferior arc portion, thereby exhibiting a stopper effect. Further, the vertical frames 2a, 2
b is brought into contact with the upper frames of the storage frames 1a and 1b, and a part of the vertical frames 2a and 2b is brought into contact with the locking frame 11 extending from the chassis frame, whereby the unfolded state is obtained. In the vertical frame 2a,
2b is supported, the vertical frame is supported stably, and it is possible to climb and descend with heavy luggage.

When the loading and unloading is completed, the vertical frames 2a and 2b are returned upward by holding the handle 10, and at the same time, the step boards 3a and
Each of the step plates 3a, 3c is gripped by a part of the step plates 3a, 3c by a four-bar mechanism via link bars 4a, 4b.
a, 3c are folded. Then, the storage frames 1a, 1
When it is pushed back inside, the vertical frames 2a and 2b slide into the storage frame, and are stored in the space where the vertical material is erected between the horizontal material of the loading portion and the chassis frame. Therefore, the storing operation is easy, and since it does not protrude outside, it is safe to run and conforms to the road traffic law.

[0014]

[Effects of the Invention] The auxiliary stairs of the present invention based on the above configuration and operation can be ascended and descended securely, work is safe, and especially for heavy loads up and down, the female driver exerts its power. The operation is as simple as pulling the frame and turning it, so it is easy to handle, and furthermore, it can be folded and stored using the body space, so it does not disturb the operation and conforms to the Road Traffic Act Fit.

[Brief description of the drawings]

FIG. 1 is a side view showing a deployed state of an auxiliary staircase of the present invention.

FIG. 2 is a front view of a state in which the auxiliary staircase of the present invention is attached to an automobile.

FIG. 3 is a partially cutaway side view showing a state where the auxiliary staircase of the present invention is housed.

FIG. 4 is a front view showing a deployed state of the auxiliary staircase of the present invention.

FIG. 5 is a partially enlarged side view showing a shaft portion of a step plate of the auxiliary staircase of the present invention.

[Explanation of symbols]

 1a, 1b Storage frame 2a, 2b Vertical frame 3a, 3b, 3c Step plate 4a, 4b Link rod 5a, 5b Locking piece 6a, 6b, 6c Support shaft

Claims (1)

(57) [Scope of request for utility model registration] 1. A storage frame is disposed in a space where a vertical story is erected between a horizontal story of a loading portion and a chassis frame, and two vertical frames are slidably fitted in the storage frame. A plurality of step plates are rotatably mounted on the vertical frame, a link rod is mounted on the tip of each step plate, and a four-bar mechanism is formed by the bottom frame, the upper and lower step plates, and the link rod. , A vertical shaft and a step plate forming a part of the four-bar mechanism,
Forming an inferior arc and fitting the superior arc to the vertical frame where it fits
Stairs inclined at an appropriate angle with locking pieces formed with grooves
And an auxiliary staircase for a lorry, wherein the auxiliary staircase is formed so that it can be folded and stored .