JPS5833539A - Encasing device for freight receiving base in cargo-handling car - Google Patents

Abstract

PURPOSE:To turn the freight receiving base largely at the small angle of rotation of a lifting link supporting the freight receiving base by connecting a connecting rod besides the lifting link to the freight receiving base through a rotary link and a push-up link and detachably forming the both links. CONSTITUTION:The first rotary link 15 is axially supported to the central section of a mounting bracket 14 fixed to the connecting member 13 of the left and right lifting links 3. One end of the connecting rod 16 is axially supported at one end of the link 15, and the other end of the connecting rod 16 is axially supported to the mounting section of a car body 1. One end of the second rotary link 17 is axially supported to the other end of the link 15, and the other end of the link 17 is axially supported to one end of the push-up link 18. The other end of the push-up link 18 is axially supported to the bracket 19 of the freight receiving base 9. A connecting pin 22 is inserted detachably into a hole formed to the intermediate section of the link 17. On the other hand, a connecting concave section 25 is formed to the push-up link 18, and the connecting pin 22 is connected to said concave section 25 when the angle of refraction between the rotary link 17 and the push-up link 18 is predetermined.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a cargo handling vehicle which can be raised and lowered by a pair of upper and lower elevating links while holding a loading platform in a substantially horizontal position, and in which cargo is loaded and unloaded using the loading platform. In particular, the loading platform can be stored vertically by utilizing the rotation of the lifting link.

The present invention relates to a loading platform storage device in a loading vehicle.

In conventional cargo handling vehicles of this kind, when the loading platform is stored, the lifting link and loading platform are integrated, and the lifting link is rotated approximately 90 degrees to rotate the loading platform from a horizontal position to a vertical position. It was like that. For this reason, the elevating link had to be able to rotate significantly, and its shaft support to the vehicle body had to be located as close to the rear end of the vehicle body as possible. The shaft support is installed on a mounting part that protrudes downward from the vehicle body so that the height is approximately halfway between the raised and lowered positions of the cargo platform, but the bearing part is located near the rear end of the vehicle body. In order to do this, the mounting part had to be located at a distance to the rear from the rear wheel.

As a result, the angle that the line connecting the rear tire circumferential surface and the lower surface of the mounting surface becomes smaller with respect to the ground, which has the disadvantage that the mounting section may come into contact with the ground and be damaged when climbing a hill, etc. Ta.

In addition, since the rotation angle of the lifting links is large, when the loading platform is raised to its maximum, the distance between the pair of upper and lower lifting links becomes small, making the support of the loading loading platform unstable.

The present invention aims to eliminate such drawbacks of the conventional ones, and even if the rotation angle of the lifting link is small, when the loading platform is stored, the loading platform is kept in a horizontal state as the lifting link rotates. It is an object of the present invention to provide a loading platform storage device for a cargo handling vehicle that can be rotated approximately 90 degrees from a vertical position to a vertical position.

By reducing the rotation angle of the lift link in this way, the shaft support of the lift lean link to the vehicle body can be brought closer to the rear wheels, and the contact between the ground and the receiving part of the vehicle body where the shaft support is installed can be moved closer to the rear wheel. This reduces the risk of this, and it also becomes possible to support the loading platform in a stable manner even in the raised position.

An embodiment of the present invention will be described below with reference to one drawing.
In the figure, the rear end of the vehicle body 1 of the cargo handling vehicle.

In other words, the rear wheel (not shown) slightly forward of the rear end of the vehicle body 1
At the appropriate position behind the , on both its left and right sides.

A mounting portion 2 projecting downward is provided, and a pair of upper and lower lifting links 3, 4 are pivotally supported on the mounting portion 2. This bearing portion is located approximately midway between the upper surface of the loading platform 5 and the ground 6. The other end of the upper elevating link 3 is pivotally supported by a shaft 7 on one end of the upper part of a connecting plate 8, and the other end of the lower elevating link 4 is pivotally supported on the lower end of the same connecting plate 8. thus.

The elevating links 3 and 4 are substantially parallel links. The shaft 7 that pivotally supports the elevating link 3 and the connecting plate 8 further pivotally supports the base of a cargo receiving platform 90. The end wall 10 at the base of the loading platform 90 is designed to come into contact with the side surface of the connecting plate 8, and normally, due to the weight of the loading platform 9, the end wall 10 comes into contact with the side surface of the almost vertical connecting plate 8. The cargo receiving platform 9 is held substantially horizontally.

A hydraulic cylinder 11 is pivotally supported at the lower end of the mounting portion 2, and the tip of the piston rod 12 is a connecting member that connects the tips of the left and right lifting links 3 provided on both the left and right sides of the vehicle body 1. It is pivotally supported by 13. Since the shaft portion of the lifting link 3 of the receiving section 2 and the shaft portion of the hydraulic cylinder 11 are vertically separated from each other, by telescopically operating the hydraulic cylinder 11, the lifting link 3 is moved up and down via the connecting member 13. Rotate to.

As a result, the loading platform 9 maintains a nearly horizontal position from the raised position where it is on the same plane as the top surface of the loading platform 5, as shown by the solid line in FIG. Go up and down. At this time, the rotation angle of the elevating links 3 and 4 is set to be smaller than 90 degrees, as is clear from the figure.

As shown in FIGS. 2, 3 and 4, a mounting bracket 14 is fixed to the connecting member 13 of the left and right lifting links 3. In this mounting bracket 14.

A first rotation link 15 is pivotally supported at its center. One end of a connecting rod 16 is pivotally supported at one end of the first rotation link 15, and the other end of this connecting rod 16 is pivotally supported by an attachment portion of the vehicle body 1. When the lifting links 3 and 4 rotate due to the operation of the hydraulic cylinder 11, this connecting rod 16
is adapted to rotate the first rotation link 15.

One end of the second rotation link 1 is pivotally supported at the other end of the first rotation link 15 . In addition, this second rotation link 17
The other end is pivotally supported by one end of the push-up link 18.

The other end of the push-up link 18 is pivotally supported by a bracket 19 fixed to the end wall of the base of the loading platform 90.

As shown in FIGS. 3 and 5, a locking pin insertion hole 20 is bored in the middle part of the second rotation link 17, and a locking pin support is provided on the back surface of the hole 20 as shown in FIG. A part 21 is attached to support the locking pin 22 in a slidable manner. The locking pin 22 is provided with a stopper 24 that engages with a long groove 23 formed in the support member 21, and the sliding of the locking pin 22 is restricted between a position protruding from the insertion hole 20 and a position retracted. It is supposed to be done. On the other hand, on the intermediate lower surface of the push-up link 1, when the bending angle between the second rotation link 17 and the push-up link 18 is a predetermined angle, a locking member protrudes from the insertion hole 20 of the second rotation ring 17. An engagement recess 25 that can engage with the stop pin 22 is formed. When the bending angle between the second rotation link 17 and the push-up link 18 is set to a predetermined angle, the loading platform 9 is in a vertical state when the lifting link 3.4 is rotated to the highest position. It has become.

Next, the operation of the above embodiment will be explained.
When carrying out cargo handling work by holding the hydraulic cylinder 11 horizontally and moving it up and down, the locking pin 22 should also be moved back through the insertion hole 20 of the second rotation link 17. Then, when the hydraulic cylinder 11 is telescopically operated, the lifting link 3°4 rotates in the vertical direction. At this time, the connecting rod 16 also rotates in the vertical direction, but as shown in FIG. 3, the first rotating link 15. Since the second rotation link 17 and the push-up link 18 are bent freely, no acting force from the connecting rod 16 is applied to the load receiving platform 9. Therefore, the loading platform 9 moves up and down with the end wall 10 of the loading platform 9 in contact with the 1111 surface of the connecting plate 8 as described above. The connecting plate 8 is supported by the elevating links 3 and 4, which are almost parallel links.

As shown in FIG. 1, its sides are kept substantially vertical, so that the loading platform 9 is held substantially horizontal.

When the cargo handling work is finished and the cargo receiving platform 9 is to be stored, the second
"shown by the one-dot chain line in the figure": First, the loading platform 9 is lowered, the angle between the second rotation link 17 and the push-up link 18 is large, and the insertion hole 20 of the locking pin 22 and the push-up link 18 are At a position before the engagement recess 25 faces the insertion hole 2
Insert the locking pin 22 from o. When the hydraulic cylinder 11 is extended in this state, the elevating links 3, 4 and the connecting rod 16 rotate upward. At this time, the lifting link 30
Since the center of rotation and the center of giant movement of the connecting rod 16 are different, the connecting rod 16 applies a tensile force of 10 to the first rotating link 15. Therefore, the first rotation link 15
The second point centered on the point pivoted on the mounting bracket 14 of
Since it rotates counterclockwise in the figure and presses the second rotation link 17, the angle formed by the second rotation link 17 and the push-up link 18 becomes smaller, that is, the bending angle between them becomes larger. As shown by the two-dot chain line in Fig. 2, the locking pin 22
and the engagement recess 25 of the push-up link 18 engage with each other. As a result, the bending angle between the second rotation link 17 and the push-up link 18 is regulated to that angle.

When the hydraulic cylinder 11 is further extended, the connecting rod 16
further pulls the first rotation link 15, and the second rotation link 17
and presses the push-up link 18.

On the other hand, since the load receiving platform 9 is pivotally supported by the lift link 3 by the shaft 7, it is rotated upward around the shaft 7, that is, counterclockwise in the figure, by the pressing force applied from the push-up link 18 to the bracket 19. do. In this way, the connecting rod 16
Because the load receiving platform 9 rotates more than the lifting links 3 and 4 due to the action of , when the lifting links 3 and 4 rotate to the highest position.

The loading platform 9 is rotated vertically. That is, even if the rotation angle of the elevating links 3 and 4 is smaller than 90 degrees, the loading platform 9 can be rotated approximately 90 degrees from a horizontal position to a vertical position. In this way, as shown in solid lines in FIG. 2 and in FIG. 4, the loading platform 9 is stored and held vertically.

In addition, in the above embodiment, the first rotation link 15 and the second rotation link 17 that are mutually supported as rotation links are
Although two rotation links are used, they can also be integrated. In addition, the insertion hole 20 of the locking pin 22
is provided on the rotation link side, but this is the push-up link 18
It is also possible to provide an insertion hole in the mutually opposing portions of both the rotation link and the push-up link 18 so that the side surface of the rotation link and the locking pin 22 are engaged. A stop pin 22 may also be inserted.

As described above, according to the present invention, in addition to the elevating link that supports the loading platform, a connecting rod pivotally supported on the vehicle body is used, and the rotating link is rotated by the connecting rod.

The push-up link, which is pivotally supported by the pivot link and the loading platform, can be engaged with and disengaged from the pivot link by means of a locking pin, so that the pivot link and push-up link are engaged when the loading dock is stored. A cargo receiving platform in a cargo handling vehicle that allows the cargo receiving platform to be rotated greatly by rotating the cargo receiving platform, and therefore allows the cargo receiving platform to be rotated from a horizontal position to a vertical position and stored even if the rotation angle of the elevating link is small. A storage device can be obtained. By reducing the rotation angle of the elevating link, the axial support of the elevating link to the vehicle body can be brought closer to the front, that is, closer to the rear wheels, and the vehicle moves from a flat surface to an inclined surface. In addition to eliminating the risk of damage due to the shaft support of the lifting link to the vehicle body coming into contact with the ground, the gap between the pair of lifting links is increased even when the loading platform is in the raised position, making the loading platform stable. It can be supported in any condition.

[Brief explanation of the drawing]

FIG. 1 is a side view of the main parts of a cargo handling vehicle equipped with the device of the present invention, and FIG. 2 is a longitudinal cross-sectional view of an embodiment of the device of the present invention.
3 and 4 are enlarged views of the essential parts of FIG. 2, each showing a different operating mode, and FIG. 5 is a v-vi expanded sectional view of FIG. 4. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Mounting part, 3, 4... Lifting link, 9... Loading platform, 15.17... 1st. Second rotation link, 16... Connecting rod, 18... Push-up link, 2
0... Locking bottle insertion hole, 22... Locking pin 14-

Claims (1)

[Scope of Claims] The base of the loading platform is pivotally supported by a pair of upper and lower lifting links that are respectively pivotally supported at the rear end of the vehicle body, so that the loading platform can be raised and lowered while being held substantially horizontally. In addition, in a cargo handling vehicle in which the loading platform can be stored vertically by controlling the rotation of the loading platform with respect to the lifting link; a rotating link pivotally supported at the tip of the lifting link;
a push-up link that is rotatably supported by the rotating link and whose other end is pivotally supported by the base of the loading platform; one end is pivotally supported by the rotating link and the other end is pivotally supported by the vehicle body. a connecting rod that rotates the rotary link when the elevating link rotates; a locking pin that is bored in at least one of the rotary link and the push-up link and that restricts bending between them to a predetermined angle; A loading platform storage device for a cargo handling vehicle, comprising: an insertion hole into which the cargo can be inserted;