JPH10244868A - Deck sheet frame for soil conveying truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect a deck from heavy rain or snow not only in a loaded time but also in non-loaded time by covering a ceiling opened part by means of sheet frames arranged on both sides of a deck in a soil conveying truck, in which the sheet frames to be fan likely moved are arranged on both sides of the deck while a sheet is spread between the sheet frame and the frames are raised in a loading time for preventing cargoes from scattering. SOLUTION: Sheet frames arranged on both sides of a deck 3 is constructed of a double folding sheet frame consisting of main sheet frames 7, 7a supported on moving shafts 6, 6a, auxiliary sheet frames 9, 9a arranged on the point sides of the main sheet frames 7, 7a via supporting shafts 8, 8a swiverably. According to the fan likely moving and rising action of the main sheet frames 7, 7a, the auxiliary sheet frames 9, 9a are opened so as to cover a ceiling opened part above the deck 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial application] It is used not only for earth and sand transport trucks, but also for trucks and dump trucks that require a cover sheet on the side plate of the loading platform to prevent the loaded luggage from falling or scattering. Yes, it is used in trucks to prevent damage or soiling of loads and cargo beds due to rainfall or snowfall and to protect loads, especially when loading cargo or parking with empty vehicles.

[0002]

2. Description of the Related Art Conventionally, many dump trucks are provided with a seat frame which can be instigated outside a side plate of a loading platform.
A sheet is stretched on this sheet frame, and when loading and transporting earth and sand, the sheet frame is agitated to stand on both sides of the load to prevent falling and scattering of the earth and sand.

FIG. 1 (side view) shows an example of a dump truck. The dump truck 1 has a protector 2 provided in front of a loading platform 3 (on the side of a driver's seat). Is provided with a sheet 4. The seat 4 is driven by an axle shaft 6 supported on the upper outside of the side plate.
And one end thereof is attached to a seat frame 7 attached thereto.

On the other hand, the fan shaft 6 is driven by a drive device 5 provided on the side of the protector 2 of the carrier 3 as needed. The drive device 5 is generally started by an electric motor, and can rotate forward and reverse. In the event of an abnormal load, a safety device for automatically stopping or shutting off driving of the fan shaft 6 is also provided.

On the other hand, as shown in FIGS. 2 and 3 (both are rear views of FIG. 1), the seat frames 7, 7a are rotated by the fan shafts 6, 6a pivotally supported on the outer upper portions of both side plates of the carrier. When loading and transporting the luggage, the luggage is raised to protect the luggage as shown in FIG. When dropping the luggage, the luggage is again along the side plate of the luggage carrier as shown in FIG.

[0006]

However, in such agitated sheets 4, 4a, the ceiling is open as shown in FIG. Therefore, during rainfall or snowfall, a special canopy cover sheet is prepared on the protector 2 so as to cover the ceiling opening. In addition, there is a case where it is necessary to park for a long time while the vehicle is loaded, and in particular, a dump truck used for road pavement works often transports gravel, sand, and asphalt. Such a dump truck is particularly sensitive to rain and snow, and it is strongly desired that the dump truck be capable of fully utilizing the conventional agitating sheet frame device to cover the above-mentioned ceiling opening.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention comprises a conventional folding seat frame as a main seat frame, and a double folded sheet frame of an auxiliary seat frame which is pivotally supported so as to be pivotable to the leading end side of the seat frame. In addition, the auxiliary sheet is kept as it is or the rotation of the support shaft of the auxiliary sheet is restricted by the standing operation of the main sheet, and the ceiling opening is covered by the auxiliary sheets on both sides.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. However, the drawings show one specific embodiment of the present invention, and the present invention is not limited to the illustrated example but has the purpose described below. The present invention can be similarly implemented even if a part of the configuration is changed or a part of the design is changed. FIG. 4, FIG. 5, FIG.
FIG. 2 is an enlarged view of a part of FIG. 2 showing the gist of the present invention. That is, the previous frames whose one ends are supported by the axle shafts 6 and 6a pivotally supported on the upper outer sides of both side plates 3a (FIG. 6) of the loading platform 3 are defined as main sheet frames 7, 7a. The shafts 8 and 8a are loosely supported on the other end sides of the shafts, respectively. Then, one end supporting sides of auxiliary seat frames 9, 9a similar to the main seat frames are attached to the support shafts 8, 8a, respectively.

FIGS. 4, 5, and 6 mainly show the relationship between the main sheet frame and the auxiliary sheet frame, and the sheets attached to or supported by these frames are omitted. In these figures, FIG. 4 shows a state in which the main sheet frames 7, 7a and the auxiliary sheet frames 9, 9a are bent, respectively, and the support shafts 8, 8a connect the auxiliary sheet frames 9, 9a to the main sheet frame. 7,7
It is rotated and held along the line a. That is, in the case of an empty load, the drive shafts 6, 6a are respectively
7a is instigated and stopped along the side plate of the carrier.

FIG. 5 shows a state in which the main shafts 7, 7a are erected by the drive units 5, 5 (one of which is not shown) by the fan shafts 6, 6a. As shown in the figure, the auxiliary sheet frames 9 and 9a are arranged such that their leading ends are close to each other so as to cover the above-mentioned ceiling opening. FIG. 6 shows a case where it is not necessary to cover the ceiling opening even if a double-fold double sheet frame is provided. In such a case, the auxiliary sheet frames 9 and 9a are respectively connected to the main sheet frames 7 and 7a. This is to maintain the previous seat frame standing position in the folded state. If necessary, the leading ends of the auxiliary seat frames 9 and 9a may be configured to overlap with each other, or the auxiliary seat frames on only one side may be activated. These actuation means should be better understood by the arrangement described below. Since the devices provided on both sides of the carrier are symmetrical, only one side will be described below.

FIG. 7 (partially omitted side view) shows a part of FIG. 1 to which the present invention is applied, and FIG. 8 (side view) shows a state in which a part of FIG. 7 is enlarged and the clutch is operated. Is shown. That is, the bearing 10 is fixedly mounted on the side surface of the conventionally provided propulsion shaft protector 2 of the fan shaft 6. The bearing 10 is provided with a mooring portion 10a protruding rearward on a part (outside in the illustrated example) of the outer periphery thereof. On the other hand, a sprocket wheel 12 integrally formed with a clutch device is loosely supported by the fan shaft 6, and in this clutch device, an engagement plate 11, a sprocket wheel 12, and one of meshing clutches 13 are integrally connected. And is freely supported by the agitating shaft 6. Further, this clutch is a two-way clutch for either spur-rotating the sprocket wheel 12 with the fan shaft 6 or holding the sprocket wheel 12 in a stopped state.

That is, the driving side 14 of the clutch is connected to the fan shaft 6
As shown in FIG. 9 (a cross-sectional view in the direction of the arrow along the cutting line AA in FIG. 8), the bearing 1
A hole 11a is formed to engage with the mooring portion 10a protruding at 0. At the same time, the engagement between the one of the meshing clutches 13 and the fan shaft side clutch 14 is released,
The sprocket wheel 12 is stopped by engaging with the mooring portion 10a of the bearing to which the hole 11a is fixed.
On the other hand, an appropriate means can be adopted for this clutch operation, but in the figure, a fork engaging member 20 which slides in the direction of the fan axis is attached to one end of the sliding shaft 17 on the outer peripheral portion of the engaging plate. Although a configuration is shown in which the driving shaft is freely supported by the fixed bearing 19 and the operation lever 21 is engaged with the other end, an appropriate clutch device can be employed as described above. It is desirable that these clutch devices are provided with engagement securing means.
Although a part of the sliding shaft is provided with a through-hole for a retaining pin to match an engaging hole formed on the mounting side, a mooring means may be provided on a part of the sliding shaft. Although the manual clutch operation has been described, an electromagnetically operated clutch may be used for remote operation. Since the clutch device configured as described above swells from around the fan shaft, a U-shaped member is arranged on the carrier side plate of the clutch portion to form a cavity. The engagement disk 11 has a large diameter and the engagement hole 11a engages with the mooring portion 10a.
It is also possible to employ a meshing clutch as described above, one of which is formed on the edge side of the fixed bearing 10, and a conventionally known suitable clutch device can be used.

As shown in FIGS. 7 and 8, the main seat frame 7 has a mounting boss 7b of the arm rod fixed to the fan shaft 6, and a bearing for supporting the support shaft 8 at the other end. A boss 7c is formed. The arm wand is provided with one or two rods at the front and rear ends (in the traveling direction of the vehicle) of the main seat frame 7 and at an intermediate position between them. On the other hand, the support shaft 8 rotatably supported by the bearing boss on the other end of each arm stick is fixed to the mounting-side boss 9b of the arm stick constituting the auxiliary seat frame 9. In addition, this auxiliary sheet frame also has an intermediate position like the main sheet frame.
Two arm rods are provided to form a frame, and these sheet frames are pivotally supported by the support shaft 8, and only the auxiliary seat frame 9 is driven by the rotation of the support shaft 8 in a fan-rotating manner.

On the other hand, the front end side of the support shaft 8 is projected from the arm rod group, and the chain wheel 16 is fixed to the projected portion. Then, the chain wheel 16 and the sprocket wheel 12 provided in the clutch device are connected by a chain 15. It is recommended to arrange one or two sets of turnbuckle devices 18 in the middle of the chain 15 in order to maintain a constant tension at all times and to facilitate maintenance management.

By such connection, when the fan shaft 6 and the sprocket wheel 12 are integrally fanned (the clutches 13 and 14 are engaged and the engagement plate 11 is released), the fan shaft 6 is used as the main shaft. Although the seat frame 7 is erected as shown in FIG. 6, the support shaft 8 also revolves by fan rotation, so that the auxiliary seat frame 8 is erected in a folded state.
On the other hand, when the clutches 13 and 14 are released by operating the clutch, the engagement plate 11 is moored as described above and holds the sprocket wheel 12 in a non-rotating state. With this, the spindle 8
The rotation of the chain wheel 16 fixed to the shaft is restricted by the revolution, and the rotation of the support shaft 8 is also restricted as shown in FIG. Can be located. A good gear ratio between the sprocket wheel 12 and the chain wheel 16 was obtained by using a gear ratio of 12:16, but the gear ratio can be appropriately selected depending on the dimensions of the seat frame and the opening angle. Although not shown, a cover case surrounding the chain wheel, the sprocket wheel, the chain, and the clutch device may be supported by the fan shaft.

On the other hand, as shown in FIG. 7, the sheet 4 to be attached to the two-folded sheet frame passes through the eyelet provided at the peripheral edge thereof, and the loading side is supported by the agitating shaft 6, while the opposite auxiliary sheet side is the main sheet frame. The auxiliary seat frame 9 is supported on the front end side so as to surround the support shaft 7 and the support shaft 8. Then, both edge sides of the seat are similarly attached to the front and rear end arms of the main seat frame and the auxiliary seat frame, respectively. FIG. 8 shows a state in which the loading platform side of the sheet is supported on the top of the loading platform side plate, and the edge of the sheet is attached with a holding plate 4b. Also, the illustrated example shows that the auxiliary sheet frame is held in position when it is folded in conformity with the arm rod of the main sheet frame. However, a regulating piece is provided on a part of the arm rod to regulate the folding position. May be configured. The auxiliary seat frame 9 is a metal frame similar to the main seat frame 7. However, in order to reduce the weight, the distal end of the arm rod is stretched with a wire so that the distal end of the seat 4 is supported. It may be.

[0017]

According to the present invention, the sheet holding frame provided on both sides of the bed of the earth and sand transport truck and held upright is constituted by a double folding frame, and when standing up, the sheet holding side is operated to open. As a result, the cargo can be protected from rainfall and snowfall because it covers the opening formed in the ceiling of the cargo. Also, when transporting a heated object such as asphalt, it can be used to cover the open portion and to keep the temperature warm. In addition, since the ceiling release portion can be covered even with an empty vehicle, the snow removal operation of the cargo bed can be eliminated in a snowfall area, and it can be used very effectively as a truck carrier.

[Brief description of the drawings]

[Fig. 1] Side view

FIG. 2 Rear view

FIG. 3 is a rear view showing the operation of FIG. 2;

4 is an enlarged view of a part of FIG. 2 in a rear view showing the present invention.

FIG. 5 is a rear view illustrating the operation of FIG. 4;

FIG. 6 is a rear view of the operation of FIG.

FIG. 7 is a partially omitted side view of FIG. 1 showing an embodiment of the present invention.

8 is a partially enlarged side view of FIG. 7;

FIG. 9 is a cross-sectional view in the direction of the arrow along the cutting line AA in FIG. 8;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Dump truck suitable for carrying out the present invention 2 Protector 3 Packing bed 4 Seat 5 Drive device 6 Fan shaft 7 Seat frame 8 Support shaft 9 Auxiliary seat frame 10 Bearing 11 Engagement board 12 Sprocket wheel 13 Mesh clutch (sprocket side play slide 14) Mesh clutch (fan shaft mounting side) 15 Chain 16 Chain wheel 17 Sliding shaft 18 Turnbuckle 19 Fixed bearing 20 Bifurcated engaging member 21 Clutch operating lever

Claims (3)

[Claims] 1. A sheet frame having a cover sheet stretched over an outside of both side plates of a carrier via a fan shaft, and the sheet frame is agitated to prevent a load from being scattered. A luggage carrier sheet frame for an earth and sand transport truck, wherein the sheet frame is constituted by a double folded double sheet frame of a main sheet frame and an auxiliary sheet frame. 2. A two-fold double sheet frame comprising a main sheet frame and an auxiliary sheet frame, wherein a support shaft of the auxiliary sheet frame is freely supported at a leading end side of the main sheet frame, and the auxiliary sheet frame is assisted by agitating the main sheet frame. 2. The bed sheet frame of the earth and sand transport truck according to claim 1, wherein the rotation of the support shaft of the sheet frame is restricted. 3. The support shaft of the auxiliary seat frame loosely supported on the leading end side of the main seat frame is connected to a sprocket provided on the main seat frame drive shaft via a clutch via a chain, and the clutch supports the auxiliary seat frame. 3. The sheet frame of the bed carrier for soil transport truck according to claim 1, wherein the seat frame is configured to restrict the rotation of the shaft.