JPH0544198Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is used by being attached to a dump truck bed in order to prevent soil loaded on the bed of a dump truck from spilling from the bed during driving. The present invention relates to an improvement of a seat hanging device for a dump truck.

[Conventional technology]

If the bed of a dump truck is loaded with earth and sand, there is a high risk that the earth and sand will fall from the bed while the truck is driving, posing a danger to following vehicles and passersby. , it is stipulated that the top surface of the earth and sand loaded on a dump truck should be covered with a sheet.

Conventionally, as shown in FIG. 4, the base end of the sheet tensioning arm 19 is connected to a shaft for rotating the arm, as shown in FIG. 18, and this arm rotation shaft 18 is rotatably supported between bearings 17, 17 horizontally protruding from both ends of the upper outer surface of the loading platform side plate 13, and the arm rotating shaft 18 is fixed to the loading platform. The arm rotation shaft 18 is rotated by the drive of the motor 20, and the sheet stretching arm 19 is moved from a position where it hangs on the outer surface of the loading platform 12 to a position where it hangs down on the outer surface of the loading platform 12. A device that can be rotated to a position that covers the top surface is known.

[The problem that the idea aims to solve]

However, in the above-mentioned conventional example, the arm rotating shaft 18 is disposed on the upper outer surface of the side plate 13 of the loading platform,
However, since the wheels inevitably protrude outside the vehicle body, there is a risk of them coming into contact with pedestrians or other vehicles while the vehicle is moving, which is extremely dangerous.

Furthermore, in order to increase the loading capacity of the dump truck platform 12 as much as possible, the width of the vehicle is generally expanded to almost the limit of the legally regulated dimensions. If it is attached to the outside, there is a problem that the width of the vehicle will exceed the legal limit and the vehicle will fail the vehicle inspection.

As shown in FIG. 5, bearings 27, 27 are provided protruding from the upper surface of the loading platform side plate 23, and the base ends of the sheet tensioning arms 29 are fixed to the arm rotation. By rotatably supporting the moving shaft 28 and connecting and interlocking it with the motor 30, it is possible to eliminate the arm rotating shaft 28 from protruding outward in the width direction of the vehicle body.

However, in this case, when carrying earth and sand into the loading platform 22 using a power shovel or the like, there is a high risk that the shovel will come into contact with the arm rotation shaft 28 and damage the shaft 28, which poses a problem in practicality.

As a measure to solve the above-mentioned conventional problems, the inventor of the present invention focused on the fact that the side plates of dump trucks have a sturdy double-wall structure because it is necessary to load a large amount of earth and sand. As a result of considering the use of the hollow space between the walls as a protective space for the shaft for rotating the arm, the present invention was devised.

[Means to solve the problem]

As shown in the drawings of the embodiment, the present invention has a hollow double structure in which the loading platform side plate 3 of the dump truck 1 is closed between the upper ends of the inner and outer walls 3a and 3b with a predetermined interval between them by an upper wall 3c. At the same time, the inner and outer walls 3a, 3
an upwardly U-shaped notch 4 penetrating between b;
4, 4 are provided at appropriate intervals, and the front and rear opposing surfaces and bottom surfaces of each notch 4 are connected to front and rear standing wall plates 5a, 5a and bottom wall plate 5b.
An arm rotating shaft 8 which is rotated by the drive of the motor 10 is provided in the hollow upper end of the loading platform side wall 3, and the shaft 8 is connected to each notch 4.
The sheet tensioning arm 9 is rotatably inserted into and supported by the front and rear standing wall plates 5a, 5a, and further, the base end of the sheet tensioning arm 9 is fixed to the shaft portion 8a, 8a, 8a exposed in the cutout portions 4, 4, 4. It is characterized by the fact that

[Effect]

According to the above configuration, the arm rotation shaft 8 is housed in the side plate 3 of the dump truck 1 without protruding outward from the side plate 3, so that the shaft etc. are not exposed to passersby or vehicles when the truck is traveling. Since there is no risk of collision and the legal vehicle width limit is not exceeded, situations such as failure of vehicle inspection can be avoided.

Furthermore, the notch 4 of the shaft 8 for arm rotation,
Since the entire portion except the exposed portions 4 and 4 is protected by the platform side plate 3, contact with a power shovel or the like during loading of earth and sand is reliably prevented.

Moreover, a notch 4 is provided at the hollow upper end of the loading platform side plate 3.
By providing 4, 4, these notches 4,
The sheet tensioning arm 9 fixed to the shaft portions 8a, 8a, 8a exposed at 4, 4 is not prevented from rotating smoothly. In addition, each notch 4 has its front and rear facing surfaces and bottom surface connected to front and rear vertical wall plates 5a, 5a and bottom wall plate 5.
Since each part 4 is blocked by b, the earth and sand are
This can prevent the particles from entering the hollow loading platform side plate 3.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. In Figs. 1 to 3, the side plates 3, 3 of the loading platform 2 of the dump truck 1 are constructed such that an upper wall 3c closes the upper ends of the inner and outer walls 3a, 3b, which are respectively erected with a predetermined gap. The hollow upper ends of these side plates 3, 3 are provided with a plurality of notches 4, 4, 4 at appropriate intervals in the length direction. .

Each of these notches 4 is formed by cutting out the side plate 3 in a U-shape with the upper surface and both left and right sides open.
As shown in the figure, the front and rear opening surfaces of the standing wall plate 5a,
5a, the lower opening surface is also connected to the bottom wall plates 5b, 5b.
They are each blocked by A shaft insertion hole 6 is bored in each standing wall plate 5a, and a bearing 7 is installed inside the standing wall 5 at a location that coincides with the shaft insertion hole 6.
is fixed.

Arm rotating shafts 8, 8 are inserted into the hollow upper ends of the platform side plates 3, 3 in a state in which they pass through the shaft insertion holes 6, 6...6 of the cutouts 4, 4, 4 and the bearings 7, 7...7 along the length of the side plates 3, 3, and are supported for free rotation by each of the bearings 7, 7...7.

By closing the front and rear surfaces of each notch 4 of the loading platform side plates 3, 3 with the standing wall plates 5a, 5a and the bottom wall plate 5b in this way, it is possible to prevent dirt, etc. from entering into the hollow portions of the side plates 3, 3. . Incidentally, the space between the shaft insertion hole 6 of each vertical wall plate 5a and the arm rotation shaft 8 may be sealed with a rubber material or the like to prevent dirt from getting caught between the shaft 8 and the bearing 7.

Reference numerals 9 and 9 denote sheet tensioning arms, which integrally connect the horizontal frame 9b between the tips of the vertical frames 9a, 9a, 9a arranged at appropriate intervals, and
A connecting ring 9c, 9c, 9 is attached to each base end of a, 9a.
c, and over the entire surface of the space surrounded by the vertical frames 9a, 9a, 9a and the horizontal frame 9b, an earth and sand spill prevention sheet (not shown) is provided in the space. (not shown) is stretched so as not to impede the rotation of the tension arms 9, 9. That is, it is stretched from the horizontal frame 9b to the vicinity of the connecting ring 9c to prevent the sheet from getting caught on the upper end of the platform side plate 3 when the arms 9, 9 rotate. . In addition, connecting rings 9c, 9 provided at the base end
c and 9c are the shaft portions 8 of the arm rotation shaft 8 exposed in the notches 4, 4, 4 of the loading platform side plate 3;
a, 8a, 8a and are integrally fixed,
It rotates together with the arm rotation shaft 8. The connecting ring 9c has a length such that its front and rear ends are in sliding contact with the front and rear standing wall plates 5a, 5a of the notch 4, and the lower end of its circumferential surface is close to or in contact with the bottom wall plate 5b of the notch 4. By forming the diameter of the cutout 4, it is possible to prevent dirt from falling out from the notch 4.

Reference numerals 10 and 10 denote drive motors for the arm rotation shafts 8 and 8, which are disposed on the front side of the loading platform 2;
The output shaft and the front ends of the arm rotation shafts 8, 8 are connected via a suitable drive transmission means,
The arm rotating shafts 8, 8 are rotated by forward and reverse driving of the motors 10, 10, and the sheet tensioning arms 9, 9 are placed at a position where they hang down on the outer surface of the loading platform side plates 3, 3 and a position where they overlap the top surface of the loading platform 2. It is configured to be rotated between two positions.

The arm rotation shafts 8, 8 are driven forward and backward by the motor 10 as described above, as well as by the motor 10.
The rotation direction may be switched in the drive transmission means. Further, as the drive transmission means, a chain is stretched between sprockets provided on both the shafts of the motor 10 and the shaft 8, or a combination of a plurality of gears meshed at a predetermined reduction ratio is used. suitable.

In addition, in this illustrated example, the device of the present invention is installed on both side plates 3, 3 of the loading platform 2 in order to cover the earth and sand piled up on the loading platform 2 with sheets from both sides.
By devising the shape etc. of the sheet tensioning arm 9, it is possible to achieve the effect of preventing spillage of earth and sand by simply installing it on one side plate 3 of the loading platform 2.

[Effect of idea]

As explained above, when using the dump truck seat hanging device of the present invention, the dump truck 1
The loading platform side plates 3 are connected to the inner and outer walls 3a, 3 with a predetermined interval between them.
The upper ends of the loading platform side plate 3 are formed into a hollow double structure in which the upper ends thereof are closed by the upper wall 3c, and an upward U-shape is formed at a plurality of locations on the hollow upper end of the loading platform side plate 3, penetrating between the inner and outer walls 3a and 3b. Shape-shaped notches 4, 4, 4 are provided at appropriate intervals, and the front and rear opposing surfaces and bottom surfaces of each notch 4 are closed by the front and rear standing wall plates 5a, 5a and the bottom wall plate 5b, and the hollow upper end of the loading platform side wall 3 is closed. Motor 1
Arm rotation shaft 8 rotates by the drive of 0
are arranged so that the shaft 8 is rotatably inserted and supported by the front and rear standing wall plates 5a, 5a of each notch 4, and furthermore, the shaft parts 8a, 8a, exposed in the notches 4, 4, 4 are Since the base end of the sheet tensioning arm 9 is fixed to 8a, the arm rotation shaft 8 can be housed in the side plate 3 of the dump truck 1, and it can be placed outside of the side plate 3 as in the conventional case. Do not overhang. Therefore, it is possible to eliminate the risk of the shaft etc. coming into contact with passersby or vehicles during driving, etc., and safety is significantly improved.
In addition, even if it is installed on a loading platform 2 whose width is close to the legal vehicle width limit, it will stay within the legal vehicle width limit and avoid the situation of failing the vehicle inspection.
No inconvenience occurs in practical use.

Furthermore, the sheet tensioning arm 9 has notches 4, 4, 4.
Since the proximal end is fixed to the shaft portion 8a exposed at Since most of the load is protected within the hollow upper end of the loading platform side plate 3, it is possible to reliably prevent the shaft 8 from coming into contact with the shovel and being damaged during earth and sand loading work using the power shovel. In addition, each of the above notches 4
, the front and rear facing surfaces and the bottom are connected to the front and rear standing wall plates 5a, 5.
a and the bottom wall plate 5b, it is possible to prevent earth and sand from entering the hollow loading platform side plate 3 from the cut portions 4.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the present invention, where Figure 1 is a perspective view, Figure 2 is a longitudinal cross-sectional side view of the main part showing the hollow upper end of the side plate of the loading platform, and Figure 3 is the main part. FIG. FIG. 4 is a perspective view of a conventional example, and FIG. 5 is a perspective view of another conventional example. DESCRIPTION OF SYMBOLS 1... Dump truck, 2... Loading platform, 3... Side plate, 4... Notch, 8... Shaft for arm rotation, 8a... Shaft portion, 9... Seat tensioning arm, 10... Motor.

Claims (1)

[Scope of utility model registration request] The loading platform side plate 3 of the dump truck 1 is formed into a hollow double structure in which the upper ends of the inner and outer walls 3a, 3b with a predetermined interval are closed by the upper wall 3c,
Upward U-shaped notches 4, 4, 4 penetrating between the inner and outer walls 3a, 3b are provided at appropriate intervals in a plurality of locations on the hollow upper end of this loading platform side plate 3, and each of the notches 4
The front and rear facing surfaces and the bottom surface of the platform are closed by the front and rear vertical wall plates 5a, 5a and the bottom wall plate 5b, and an arm rotation shaft 8, which is rotated by the drive of the motor 10, is provided in the hollow upper end of the loading platform side wall 3. is rotatably inserted into and supported by the front and rear standing wall plates 5a, 5a of each notch 4, and furthermore, the sheet tensioning arm 9 is inserted into the shaft portions 8a, 8a, 8a exposed in the notches 4, 4, 4. Dump truck seat hanging device with fixed base end.