JPH0610040U - Dump structure of platform lift type dump truck - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the height of the ground to be lowered when the loading platform is lowered in a transport vehicle in which the loading platform is raised and lowered by an X-shaped link. [Structure] Between the chassis 12 and the loading platform 16, an X-shaped link 14 that is attached to the lower fixed fulcrum 22, the upper fixed fulcrum 24, the lower rolling roller 26, and the upper rolling roller 28, respectively.
The guide rail 30 provided on the chassis 12 of the lower rolling roller 26 based on the expansion / contraction of the X-shaped link 14 rolls at the horizontal portion 30a to move the loading platform 16 up and down, and the inclined portion 30b.
In the dump truck lifting / lowering type dump truck for dumping by rolling in the above, the dumping structure of the cargo truck lifting / lowering truck, wherein the slant portion 30b is a free-type slant portion 32 which is undulated as the cargo bed 16 is raised and lowered.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a dumping structure for a dump truck that is capable of raising and lowering a cargo bed on a chassis.

[0002]

[Prior art]

 2. Description of the Related Art There is known a transport vehicle in which an X-shaped link (cross link) is provided between a chassis and a cargo platform, and the X-shaped link is expanded / contracted to lift and lower the cargo platform. FIG. 4 is a side view of the vehicle, which has a chassis 12 having a traveling unit 10 and a loading platform 16 mounted on the chassis 12 via a pair of left and right X-shaped links 14. In the X-shaped link 14, two links 14a and 14b are combined in an X-shape in a side view, and a center crossing portion is rotatably connected by a pin 18. A hydraulic cylinder 20 is attached between the two links 14a and 14b, and the X-shaped link 14 is expanded / contracted by expanding / contracting the hydraulic cylinder 20.

The X-shaped link 14 is attached to the chassis 12 and the loading platform 16 by a lower fixed fulcrum 22, an upper fixed fulcrum 24, a lower rolling roller 26, and an upper rolling roller 28, respectively. Further, the lower rolling roller 26 rolls on the guide rail 30 mounted on the chassis 12 (the upper rolling roller 28 rolls on the bottom surface of the loading platform 16), and in this case, the guide rail 30. Has a horizontal portion 30a at the start end and a tilted portion 30b at the rear end that is inclined rearward and upward. Therefore, when the X-shaped link 14 is enlarged, when the lower rolling roller 26 rolls on the horizontal portion 30a, the loading platform 16 rises in the horizontal posture and when it rolls on the inclined portion 30b. For the first time I will dump to the rear.

[0004]

[Problems to be solved by the device]

 Although such an X-shaped link has the advantage that lifting and lowering of the loading platform and dumping can be achieved with a relatively simple structure, on the other hand, even when the X-shaped link is reduced and the loading platform is lowered, the loading platform is inclined. The height H above ground will have to be rather high. Therefore, loading and unloading luggage is very difficult. The present invention solves such a problem and makes it possible to keep the ground height low even when an X-shaped link is used.

[0005]

[Means for Solving the Problems]

 Under the above problems, the present invention provides an X-shaped link between the chassis and the loading platform, which are attached to the lower fixed fulcrum, the upper fixed fulcrum, the lower rolling roller, and the upper rolling roller, respectively. , A loading platform for raising and lowering the loading platform by rolling in the horizontal part of the guide rail provided on the chassis of the lower rolling roller based on the expansion and contraction of the X-shaped link, and dumping by rolling in the slanting part. The present invention provides a dump structure for a carrier lift type transport vehicle, characterized in that it is a freely sloping part that undulates as the carrier moves up and down.

[0006]

[Action]

 By taking the above means, that is, the slanted portion of the guide rail is configured as a free slanted portion, the slanted portion is flattened when the loading platform is lowered and does not hinder the descent. Therefore, the platform can be lowered considerably downwards.

[0007]

【Example】

 In the present invention, the free-type inclined portion 32 is provided instead of the fixed inclined portion 30b. 1 and 2 are side views showing a first embodiment of the universal inclined portion 32. The universal inclined portion 32 has a rear end pivotally attached to a fixed fulcrum 34 provided below the chassis 12. The first arm 36 that can rotate up and down around this (thus, the portion of the chassis 12 that interferes with it) is cut out, and the rolling roller 38 that rolls on the guide rail 30 (in this case, chassis 12). The second arm 40 attached to the front end is pivotally attached by a pin 42, and both are always tensioned by a spring 44. Therefore, when the platform 16 is descending, the pin 42 contacts the bottom surface of the platform 16, and the first arm 36 and the second arm 40 are substantially linear (FIG. 2). With such a configuration, it suffices if there is a space between the luggage carrier 16 and the chassis 12 that secures only the width of the links 14a and 14b, and the ground height h of the luggage carrier 16 is extremely low. it can.

Next, when the X-shaped link 14 is enlarged and the loading platform 16 is raised, the pin 42 is also raised by the amount of the rise, and the first arm 36 and the second arm 40 are bent to form a triangular shape in a side view. Becomes (solid line in FIG. 1). In this operation, the lower rolling roller 26 of the X-shaped link 14 rolls on the horizontal chassis 12. By the way, since the chassis 12 is provided with the stopper 46 that does not rotate the first arm 36 more than a certain amount, when the first arm 36 hits the stubber 46, it does not rotate any more, and the first arm 36 and the second arm 36 The triangular shape with the arm 40 is fixed. When the loading platform 16 is further raised, the lower rolling roller 26 climbs on the inclined second arm 40, and the loading platform 16 is dumped rearward (chain line in FIG. 1). When the X-shaped link 14 is contracted and the loading platform 16 is lowered, the opposite operation is performed and the arms 36 and 40 lie flat. This example has an advantage that the dump angle can be adjusted by changing the length of each arm 36, 40.

FIG. 3 is a side view showing a second embodiment of the universal type inclined portion 32. The universal type inclined portion 32 is attached to the chassis 12 by means of a hinge 48 or the like for the inclined transition of the lower rolling roller 26. (Therefore, the portion of the chassis 12 that interferes with this is cut out) is guided by one inclined plate 50, and the inclination of the inclined plate 50 is performed by the roller 52 attached to the link 14b of the X-shaped link 14. Is. That is, the roller 52 is attached to the link 14b, and when the link 14b expands to some extent, the roller 52 pushes up the inclined plate 50 from below. When the X-shaped link 14 is contracted, the inclined plate 50 becomes flush with the chassis 12, but at this time, a support 54 for supporting the inclined plate 50 so as not to fall down is attached to the chassis 12. ing. In this example, there is an advantage that the dump angle can be adjusted by changing the position of the roller 52, and that it can be lifted only by removing it.

[0010]

[Effect of device]

 As described above, since the present invention is the one described above, when the loading platform is lowered, the ground height can be set low and loading and unloading of luggage can be facilitated.

[Brief description of drawings]

FIG. 1 is a side view of a carrier showing a first embodiment of the present invention.

FIG. 2 is a side view of a carrier showing a first embodiment of the present invention.

FIG. 3 is a side view of a carrier showing a second embodiment of the present invention.

FIG. 4 is a side view of a conventional carrier.

[Explanation of symbols]

 12 chassis 14 X-shaped link 16 loading platform 22 lower fixed fulcrum 24 upper fixed fulcrum 26 lower rolling roller 28 upper rolling roller 30 guide rail 30a horizontal portion of guide rail 30b slanted portion of guide rail 32 free inclined portion

Claims (3)

[Scope of utility model registration request] 1. An X-shaped link attached between the chassis and the loading platform by a lower fixed fulcrum, an upper fixed fulcrum, a lower rolling roller and an upper rolling roller, respectively, and the expansion and contraction of the X type link In a dump truck raising / lowering type dump truck that lowers and lowers the loading platform by rolling in the horizontal portion of the guide rail provided on the chassis of the lower rolling roller and dumps by rolling in the inclined portion, A dumping structure for a loading platform lifting type transport vehicle, which is characterized by a free-type sloping section that undulates. 2. A dump structure for a dump truck lifting and lowering type dump truck, wherein the universal inclined portion according to claim 1 is erected with the upward separation of the cargo bed. 3. A dump structure for a dump truck raising and lowering type dump truck, wherein the universal inclined portion of claim 1 is erected with the expansion of the X-shaped link.