JP3095670B2 - Automatic tilting device for the loading platform of the loading platform - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loading / unloading device, and more particularly to a loading / unloading device, in which the loading tray is substantially flush with the loading tray when the loading tray is at the highest position, and the loading tray is automatically tilted and tilted backward when the loading tray is lowered. The present invention relates to an automatic tilting device for a receiving tray elevating device of a receiving tray.

[0002]

2. Description of the Related Art As a conventional automatic loading / unloading device of a loading / unloading device, there is one disclosed in Japanese Utility Model Application Laid-Open No. 63-59045. As shown in FIG. 15, when the loading tray 01 tries to reach the ground, the lower end 04 of the tilt assisting member 03 pivotally supported by the support column 02 comes into contact with the ground and does not move. Then, the forcible cam 05 is detached from the restraining member 06, the contact member 08 is separated from the lift arm 09 with the rotation of the rotating plate 07, the lift arm 09 is pulled in the arrow Q direction, and the The tip of the receiving tray 01 tilts so as to contact the ground due to the interaction with its own weight.

At this time, a stopper 010 protruding from the column 02 comes into contact with the tilt assisting member 03, and the tilting of the load receiving tray 01 is completed.

[0004]

However, in the above structure, many members such as the rotating plate 07, the tilt assisting member 03, the contact member 08, the forcible cam 05, and the restraining member 06 are required for automatically tilting the load receiving table. Necessary, the structure was complicated and the cost was increased. The present invention has been made in view of such circumstances, and has as its object to reduce the number of members for automatically tilting a load receiving table, simplify the structure, and reduce costs.

[0005]

According to the present invention, a pair of right and left mounting members are provided on a vehicle body or a carrier, and the bases of the upper and lower links are supported by upper and lower shafts on the mounting members. At the tip of the upper / lower link, a mounting column for horizontally supporting the loading table is pivotally supported to form a parallel link mechanism, and the upper / lower link is rotated by a driving means to place the loading table in a horizontal state. In the loading / unloading device, the upper shaft is rotatably supported by an upper hole formed in a mounting member, and a part of the upper hole is provided with a recessed portion. The part is provided with a notch part that can be immersed in the depression part, and when the receiving table descends most,
The cutout portion of the upper shaft is immersed in the recessed portion of the upper hole, and the receiving tray is automatically tilted to be inclined backward and downward.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be specifically described below based on one embodiment of the present invention illustrated in the accompanying drawings. Reference numeral 1 denotes a packing box mounted on a vehicle body 2, the packing box 1 having a carrier 3, and a main girder 4 and an auxiliary girder 5 on the lower surface of the carrier 3.
There is. A pipe-shaped support member 6 extending in the left-right direction is fixed to the rear end of the vehicle body 2.

At the left and right ends of the support member 6, two sets of mounting members 7 are fixed to the left and right. The mounting member 7
Has a substantially triangular shape with a flat plate shape, and a support member 6 is fixed to one corner. Reference numerals 8 and 9 denote an upper link and a lower link which are vertically arranged in parallel with each other. The bases of the links 8 and 9 are located at the other end of the support member 7, that is, ahead of one corner (left side in FIG. 1).
Are fixed to a round rod-shaped upper shaft 10 and a lower shaft 11 rotatably supported at upper and lower corners located at the position.

At the leading ends of the two links 8 and 9, a vertical mounting support 12 having an L-shaped cross section is pivotally supported, and a parallel link mechanism is formed by the two links 8 and 9, the mounting member 7 and the mounting support 12. Has formed. At the lower part of the mounting column 12, the loading table 1
3 is supported, and the loading tray 13 is held in a horizontal state by a bending link 14 provided between the mounting column 12 and the loading tray 13.

When the bending link 14 is folded, the loading table 1
Numeral 3 is stored upright. A lifting cylinder 15 for rotating the upper link 8 is provided between a pair of arms 16 fixed to the upper shaft 10, and the pair of arms 16 is a pair of mounting members 7. The links 8 and 9 are vertically rotated by extension of the lifting cylinder 15 so that the load receiving table 13 is raised and lowered.

FIGS. 4 to 9 show details of the automatic tilting device for the receiving table. Boss guide members 17 are fixed to the outside of the pair of mounting members 7, respectively, and further to the other side (FIG. 4).
A guide member 18 for the shaft is fixed to the outside of the guide member 17 for the boss (right side). A long hole-shaped guide hole 17a is formed in each of the pair of left and right attachment members 7 and the boss guide member 17, and a first boss 19 is fitted into one of the guide holes 17a (the left side in FIG. 4). A second boss 20 is fitted on the other side (the right side in FIG. 4), and the first boss 19 and the second boss 20 can slide in the guide hole 17a.

The shaft guide member 18, the first boss 19 and the second boss 20 respectively have an upper shaft 10 therein.
An upper hole 21, a first boss hole 19a and a second boss hole 20a having substantially the same shape as the outer diameter of the boss hole are formed, and the upper shaft 10 is rotatable in the upper hole 21, the first boss hole 19a and the second boss hole 20a. Penetrates. The upper link 8 is fixed to the upper shaft 10 on the left side of the first boss 19 in FIG.
One of the arms 16 is fixed to the upper shaft 10 on the right side of the first boss 19 so that the first boss 19 does not move left and right.

The upper shaft 1 on the left side of the second boss 20
0, the other end of the arm 16 is fixed, and a stopper 22 is fixed to the upper shaft 10 on the right side of the shaft guide member 18 so that the second boss 20 does not move left and right by the arm 16 and the shaft guide member 18. It has become. As shown in FIGS. 6 and 9, the circular upper hole 21 of the shaft guide member 18 is formed with a ４ circular recessed portion 23 of the upper hole 21 communicating with the upper hole 21 diagonally downward. The upper shaft 10 facing the depression 23 has a depression 23
Is provided with a notch 24 having a semicircular cross-section that can be immersed in the notch.

When the receiving tray 13 is lowered, the notch 24 of the upper shaft 10 is disengaged from the upper hole 21 as shown in FIG. Of the bosses 19, 20 and the cut portions 19b, 20b of the bosses 19, 20 are guided by the guide holes 17a of the boss guide member 17, and
20 moves diagonally downward.

In this embodiment, the boss guide member and the shaft guide member are provided on the mounting member. However, the first boss, the second boss, the boss guide member and the shaft guide member are eliminated, and the two members are provided. An upper hole for the upper shaft and a depressed portion communicating with these upper holes may be formed in the pair of mounting members. Further, the first boss, the second boss, and the guide member for the boss may be omitted, and the guide member for the shaft may be mounted on both of the two mounting members. Further, the notch is semicircular and the depression is a quarter circle. However, as shown in FIG. 14, the notch 25 may be substantially rectangular and the depression 26 may be substantially rectangular. It may be square. Also, the loading platform is supported at the bottom of the mounting column,
The receiving table may be supported on a shaft support between the mounting support and the upper link.

The operation of the present invention having the above-described structure will now be described. When unloading the packages in the packing box 1, first, the loading table 13 is changed from the vertical state to the horizontal state in FIG. 1, and the packages in the packing box 1 are moved to the loading table 13. Next, the lifting cylinder 15
When the link is reduced, the links 8 and 9 rotate downward, and the mounting column 12 contacts the ground as shown in FIG. At this time, the notch 24 of the upper shaft 10 rotates in the upper hole 21 of the shaft guide member 18 as shown in FIG.
4 is disengaged from the upper hole 21.

Then, due to the weight of the luggage and the receiving tray 13, FIG.
As shown in FIG. 3, the notch 24 enters the recess 23 from the upper hole 21, and the cut portions 19 b and 20 b of the bosses 19 and 20 are guided by the guide holes 17 a of the boss guide member 17 as shown in FIGS. 11 and 12. Each boss 19, 20 moves diagonally downward. As the bosses 19 and 20 move, both the upper shaft 10 and the upper link 8 move, and as shown in FIG.
2 is tilted rearward, and the loading tray 13 is also automatically tilted backward and downward, so that the leading end of the loading tray 13 is grounded on the ground. In this state, the package is unloaded from the receiving tray 13. Next, when loading the luggage in the packing box 1, the luggage is put on the receiving table 13 in the state of FIG.

Next, when the lifting cylinder 15 is extended,
Since the notch 24 of the upper shaft 10 cannot rotate within the recessed portion 23 of the shaft guide member 18, it moves diagonally upward on the upper hole 21 side, and the cut portions 19b, 20b of the bosses 19, 20 become boss guide members. The bosses 19 and 20 are obliquely moved upward by being guided by the 17 guide holes 17a. The upper shaft 1 is moved by the movement of each boss 19, 20.
Both the upper link 8 and the upper link 8 move, and the loading tray 13 is shifted from the inclined state to the horizontal state as shown in FIG.

When the lifting cylinder 15 is further extended, the links 8 and 9 rotate upward, and the mounting column 12 contacts the packing box 1 as shown in FIG. In this state, the package is moved to the carrier 3.
After the work is completed, the loading table 1 is folded while the bending link 14 is folded.
3 is stored upright.

[0019]

As described above, according to the present invention, the upper shaft of the loading / unloading device is rotatably supported in the upper hole of the mounting member, and a concave portion is provided in the upper hole. A notch that can be immersed is provided, so that when the receiving platform descends the most, the notch enters the recessed portion, and the receiving platform tilts and falls backward. The number of members of the automatic tilting device is small, the structure is simple, and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is an operation state diagram of a loading table of the apparatus of the present invention on the same plane as a loading table.

FIG. 2 is an operation state diagram in which a mounting column of the device of the present invention is grounded.

FIG. 3 is an operation state diagram in which the receiving table of the apparatus of the present invention is automatically tilted.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a sectional view taken along line BB of FIG. 3;

FIG. 6 is an upper shaft, a second boss, a boss guide member,
It is a perspective view of a guide member for shafts.

FIG. 7 is a sectional view taken along line CC of FIG. 4;

FIG. 8 is a sectional view taken along line DD of FIG. 4;

FIG. 9 is a sectional view taken along line EE of FIG. 4;

FIG. 10 is a cross-sectional view of a cutout portion of an upper shaft and an upper hole in FIG. 2;

FIG. 11 is a sectional view taken along line FF of FIG. 5;

FIG. 12 is a sectional view taken along the line GG of FIG. 5;

FIG. 13 is a sectional view taken along line HH of FIG. 5;

FIG. 14 is a cross-sectional view of a cutout and a depression of another embodiment.

FIG. 15 is a perspective view of a conventional automatic receiving device tilting device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Body 3 Carrier 7 Mounting member 8 Upper link 9 Lower link 10 Upper shaft 11 Lower shaft 12 Mounting column 13 Loading table 21 Upper hole 23 Depressed part 24 Notch

Claims (1)

(57) [Claims] 1. A pair of left and right mounting members are provided on a vehicle body or a loading platform, bases of upper and lower links are pivotally supported on the mounting members by upper and lower shafts, and a loading tray is provided at a tip of the upper and lower links. A load receiving platform elevating device configured to form a parallel link mechanism by pivotally supporting a mounting column that supports horizontally, and to rotate the upper and lower links by driving means to raise and lower the loading platform in a horizontal state. The upper shaft is rotatably supported in an upper hole formed in the mounting member, a recess is provided in a part of the upper hole, and a cutout is provided in a part of the upper shaft so as to be able to enter the recess. When the receiving platform descends, the notch of the upper shaft sinks into the recess of the upper hole,
An automatic tilting device for a loading tray elevating device, wherein the loading tray is automatically tilted and tilted downward.