JP6942095B2 - Loading platform and work vehicle - Google Patents

Description

The present invention is a loading platform having a bottom plate having a cargo loading surface on which luggage is placed, and a beam structure having a plurality of members located below the bottom plate and receiving a load applied to the bottom plate, and a work vehicle including the same. Regarding.

Patent Document 1 describes a vehicle provided with a loading platform. In this vehicle, the loading platform (2) is supported from below by a beam structure (frame 1) having a plurality of members. This beam structure is formed by joining a plurality of frame parts (3) having the same shape to each other by welding and integrating them.
Further, FIG. 6 of Patent Document 1 also describes a beam structure (frame 54) in which a plurality of long members are arranged in a grid pattern in the vertical and horizontal directions and joined by welding.

Japanese Unexamined Patent Publication No. 2000-219148

In the beam structure (frames 1, 54) as described in Patent Document 1, stress tends to be concentrated on the welded portion between the members supporting the loading platform. In particular, in a beam structure (frame 54) in which a plurality of long members are arranged in a grid pattern in the vertical and horizontal directions and the members are joined by welding, the members are welded to each other at the intersections thereof. There is a problem that stress is concentrated on the welded part.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a loading platform capable of relaxing stress concentration and a work vehicle provided with the loading platform.

The characteristic configuration of the loading platform according to the present invention for achieving the above object is a bottom plate having a cargo loading surface on which luggage is placed, and a plurality of members located below the bottom plate and receiving a load applied to the bottom plate. It is a loading platform provided with a beam structure to have.
In the beam structure, the upper beam member located above and the lower beam member located below at the intersection of the two members are fitted at the portion of the fitting groove provided in one or both of them. Consists of
A fixing member fixed to both the upper beam member and the lower beam member at the intersection is provided .
Of the upper beam member and the lower beam member, the lower beam member is provided with the fitting groove.
The fixing member is in a state in which a semi-cylindrical portion having a vertically divided cylinder is extended in the axial direction of the cylinder along the direction in which the upper beam member is extended and covers the side surface of the upper beam member. It is in the point of having.

According to the above characteristic configuration, in the beam structure, not only the upper beam member and the lower beam member are fitted and fixed at the fitting groove portion, but also the fixing member is the upper beam member and the lower beam member at the intersecting portion. It is fixed to both. That is, the upper beam member and the lower beam member are fixed not only at the fitting groove portion but also through the fixing member. As a result, stress is also applied to the upper beam member and the lower beam member in contact with the fixing member, so that the stress is concentrated around the fitting groove portion where the upper beam member and the lower beam member are directly fixed. There will be no such thing.
Therefore, it is possible to provide a loading platform capable of relaxing stress concentration.

In addition , according to this feature configuration, the structurally strong semi-cylindrical portion is fixed to the upper beam member while covering the side surface of the upper beam member, and is also fixed to the lower beam member. .. That is, the upper beam member and the lower beam member can be fixed via a structurally strong fixing member.

Yet another characteristic configuration of the loading platform according to the present invention is that the fixing member extends from the semi-cylindrical portion and the semi-cylindrical portion to a side away from the intersection along the direction in which the upper beam member extends. It has a flat plate-shaped stretched portion, and the width of the stretched portion in the vertical direction becomes smaller as the distance from the intersecting portion increases.

According to the above characteristic configuration, the stretched portion constituting the fixing member becomes thinner, that is, structurally weaker as the distance from the intersecting portion increases. As a result, of the upper beam member fixed to the stretched portion, a strong force is not applied by the stretched portion to the portion distant from the intersecting portion.

The characteristic configuration of the work vehicle according to the present invention is that the loading platform is provided on the traveling vehicle body.

According to the above characteristic configuration, it is possible to provide a work vehicle provided with a loading platform capable of relaxing stress concentration in the beam structure.

It is an overall side view of a work platform. It is a perspective view of the loading platform provided in the work vehicle. It is a perspective view of the beam structure provided in the loading platform. It is an exploded perspective view of the intersection part of a beam structure. It is a vertical cross-sectional view of the intersection.

The loading platform 4 according to the embodiment of the present invention and the work vehicle provided with the loading platform 4 will be described below with reference to the drawings.
FIG. 1 is an overall side view of the work platform. FIG. 2 is a perspective view of the loading platform 4 included in the work vehicle.
The multipurpose work vehicle, which is an example of the work vehicle shown in FIG. 1, is a work vehicle used for various purposes such as carrying luggage and recreation. The multipurpose work vehicle includes a pair of left and right front wheels 1 that can be steered and driven, a pair of left and right rear wheels 2 that can be driven, a driving unit 3 on which an operator or the like can board, and a loading platform that can load luggage. 4 and a driving unit 5 and the like located below the loading platform 4 are provided.

The driver unit 3 is provided with a driver's seat 6 on which the driver sits, a steering wheel 8 for performing steering operations, a shift lever 9 for performing shift operations, and the like. The steering wheel 8 and the shift lever 9 are arranged on the driver panel 10 located in front of the driver's seat 6.

The driving unit 5 transmits a gasoline engine (hereinafter referred to as an engine) 11, a mission case 12 located behind the engine 11, an engine 11 and a transmission case 12 located to the left of the mission case 12 from the engine 11 to the mission case 12. A stepless speed changer 13, an air supply device for supplying combustion air to the engine 11 (not shown), an exhaust device for treating exhaust gas from the engine 11 (not shown), and the like are provided.

The circumference of the continuously variable transmission 13 is covered with a case, and a belt-type continuously variable transmission mechanism (not shown) is built inside the case. The continuously variable transmission 13 is connected and supported on the lateral side of the engine 11 and the transmission case 12. The mission case 12 is connected and supported on the rear side of the engine 11. A bonnet 16 that can be opened and closed is provided at the front portion of the traveling vehicle body, and a radiator (not shown) for cooling the engine 11 or the like is arranged in the space formed in the bonnet 16.

The traveling vehicle body of the work vehicle includes a main frame 19 that supports the front portion and the intermediate portion of the vehicle body, and a rear frame 20 that supports the driving portion 5. The rear frame 20 supports the left and right rear wheels 2 via a rear suspension (not shown), and the main frame 19 supports the left and right front wheels 1 via a front suspension (not shown).

The power of the engine 11 is transmitted to the mission case 12 after being continuously changed by the continuously variable transmission 13. A gear-type transmission mechanism (not shown) provided in the transmission case 12 enables the forward state (forward first speed state and forward second speed state), reverse state, and neutral state to appear, respectively. Then, the power of the mission case 12 is transmitted to the left and right front wheels 1 and the left and right rear wheels 2.

The loading platform 4 is supported by a traveling vehicle body (rear frame 20) of the work vehicle. FIG. 2 is a perspective view of the loading platform 4 included in the work vehicle as viewed from above. The loading platform 4 includes a bottom plate 41 having a cargo loading surface on which luggage is placed, and a beam structure 50 located below the bottom plate 41 and having a plurality of members for receiving a load applied to the bottom plate 41. The loading platform 4 has a rear side plate that rises from the rear end of the bottom plate 41, a front side plate that rises from the front end of the bottom plate 41, a right side plate that rises from the right end of the bottom plate 41, and a left side plate that rises from the left end of the bottom plate 41. It is formed in a box shape.

FIG. 3 is a perspective view of the beam structure 50 included in the loading platform 4 as viewed from below. As shown in the figure, the beam structure 50 that supports the loading platform 4 from below includes a front-rear direction member F extending in the front-rear direction of the work vehicle and a lateral member T extending in the lateral direction of the work vehicle. The front-rear direction member F includes an outer frame member 51 and an outer frame member 52 that form an outer frame of the beam structure 50, and an intermediate member 53 and an intermediate member 54 provided inside the beam structure 50. In the present embodiment, the outer frame member 51 and the outer frame member 52 are each formed of a single member. The intermediate member 53 is composed of a combination of three members, a first intermediate member 53a, a second intermediate member 53b, and a third intermediate member 53c. The intermediate member 54 is configured by combining three members, a first intermediate member 54a, a second intermediate member 54b, and a third intermediate member 54c. The lateral member T includes a fourth intermediate member 55, a fifth intermediate member 56, a sixth intermediate member 57, a seventh intermediate member 58, and an outer frame member 59. These members (front-rear direction member F and lateral direction member T) constituting the beam structure 50 are joined to each other by welding or the like, whereby the beam structure 50 having a strong structure is formed.

FIG. 4 is an exploded perspective view of the intersecting portion 21 of the beam structure 50. FIG. 5 is a vertical cross-sectional view of the intersecting portion 21. Although FIG. 4 shows the structure of the intersection 21 between the outer frame member 59 and the third intermediate member 53c, the intersection 21 between the outer frame member 59 and the third intermediate member 54c has the same structure. It has become. In the present embodiment, in the beam structure 50, there is an intersecting portion 21 where two members intersect. That is, the outer frame member 59 as the lateral member T located on the rear end side of the beam structure 50 intersects with the third intermediate member 53c as the front-rear direction member F, and the third intermediate member as the front-rear direction member F. Crosses 54c. At the intersection 21, the outer frame member 59 is located above the third intermediate member 53c and the third intermediate member 54c. That is, the third intermediate member 53c and the third intermediate member 54c are configured to support the outer frame member 59 from below. A fixing member 60 is provided at the intersection 21.
The structure of the intersecting portion 21 will be described below.

As shown in the figure, in the beam structure 50, the outer frame member 59 as the upper beam member located above at the intersection 21 and the third intermediate member 53c as the lower beam member located below are the third intermediate member 53c. It is configured to be fitted at the portion of the fitting groove 22 provided in. In addition, the fixing member 60 is fixed to both the outer frame member 59 as the upper beam member and the third intermediate member 53c as the lower beam member at the intersection 21. For example, the fixing member 60 is joined by welding or the like at a portion in contact with the outer frame member 59, and is joined by welding or the like at a portion in contact with the third intermediate member 53c.

In this way, the outer frame member 59 (upper beam member) and the third intermediate members 53c and 54c (lower beam member) are not fixed only at the fitting groove 22, but through the fixing member 60. It is also done. As a result, stress is also applied to the portions of the outer frame member 59 and the third intermediate members 53c and 54c that are in contact with the fixing member 60, so that the outer frame member 59 and the third intermediate members 53c and 54c are directly fixed and fitted. Stress will not be concentrated around the portion of the groove 22.

In the fixing member 60, the semi-cylindrical portion 61 having a shape in which the cylinder is vertically divided is extended in the axial direction of the cylinder along the direction (left-right direction) in which the outer frame member 59 as the upper beam member extends. Moreover, it is held in a state of covering the side surface of the outer frame member 59. In other words, the semi-cylindrical portion 61 of the fixing member 60 has an arch shape that straddles the outer frame member 59. Further, the semi-cylindrical portion 61 of the fixing member 60 of the present embodiment has a rectangular cross section. As described above, the structurally strong semi-cylindrical portion 61 is fixed to the outer frame member 59 in a state of covering the side surface of the outer frame member 59 (upper beam member), and the third intermediate member 53c, It is also fixed to 54c (lower beam member). That is, the outer frame member 59 and the third intermediate members 53c and 54c can be fixed via the structurally strong fixing member 60.

Further, the fixing member 60 of the present embodiment is on the side away from the crossing portion 21 along the direction in which the above-mentioned semi-cylindrical portion 61 and the semi-cylindrical portion 61 extend the outer frame member 59 as the upper beam member. It has flat-shaped stretched portions 62 and 63 that extend. The vertical width of the stretched portions 62 and 63 becomes smaller as the distance from the intersecting portion 21 increases, in other words, the stretched portions 62 and 63 have a tapered shape that becomes thinner as the distance from the intersecting portion 21 increases. That is, the stretched portions 62 and 63 constituting the fixing member 60 become thinner, that is, structurally weaker as the distance from the intersecting portion 21 increases. As a result, of the outer frame member 59 (upper beam member) fixed to the stretched portions 62 and 63, a strong force is not applied by the stretched portions 62 and 63 to the portion distant from the intersecting portion 21.

<Another Embodiment>
<1>
In the above embodiment, the loading platform 4 of the present invention and the work vehicle provided with the loading platform 4 have been described with specific examples, but the configuration thereof can be changed as appropriate.
For example, the shape of each member constituting the beam structure 50 can be changed as appropriate. As an example, in the above embodiment, the shape of the cross section of the outer frame member 59 as the upper beam member is triangular, but the shape may be circular (semi-circular) or polygonal. .. Similarly, the shapes of the third intermediate members 53c and 54c as the lower beam member are not limited to those described in the above embodiment.

In addition, in the above embodiment, the example in which the cross section of the semi-cylindrical portion 61 of the fixing member 60 is formed in a rectangular shape has been described, but the cross section of the semi-cylindrical portion 61 is formed in a semicircular shape or a polygonal shape. It may have been done.

<2>
In the above embodiment, at the intersecting portion 21, the outer frame member 59 and the third intermediate member 53c, which are the upper beam members, are the portions of the fitting grooves 22 provided in the third intermediate members 53c and 54c as the lower beam members. An example of being configured so as to be fitted with the 54c has been described, but the fitting groove 22 is formed on the upper beam member, and the fitting groove 22 is formed on both the upper beam member and the lower beam member. It may be configured.

<3>
In the above embodiment, the example in which the fixing member 60 includes the semi-cylindrical portion 61 has been described, but the fixing member 60 does not include the semi-cylindrical portion 61 and is in contact with both the upper beam member and the lower beam member, for example. It may be composed of only one or a plurality of plate-shaped members to be fixed.

<4>
In the above embodiment, the multipurpose work vehicle has been described as an example of the work vehicle, but the present invention can be applied not only to the multipurpose work vehicle but also to various types of work vehicles provided with the loading platform 4.

<5>
The configurations disclosed in the above embodiment (including other embodiments, the same shall apply hereinafter) can be applied in combination with the configurations disclosed in other embodiments as long as there is no contradiction, and are disclosed in the present specification. The embodiment is an example, and the embodiment of the present invention is not limited to this, and can be appropriately modified without departing from the object of the present invention.

The present invention can be used for a loading platform capable of relieving stress concentration and a work vehicle provided with the loading platform.

4 Loading platform 19 Main frame (running vehicle body)
20 Rear frame (running vehicle body)
21 Crossing portion 22 Fitting groove 41 Bottom plate 50 Beam structure 51 Outer frame member (front-rear direction member F)
52 Outer frame member (front-rear direction member F)
53a First intermediate member (intermediate member 53, front-rear direction member F)
53b Second intermediate member (intermediate member 53, front-rear direction member F)
53c Third intermediate member (lower beam member, intermediate member 53, front-rear direction member F)
54a First intermediate member (intermediate member 54, front-rear direction member F)
54b Second intermediate member (intermediate member 54, front-rear direction member F)
54c Third intermediate member (lower beam member, intermediate member 54, front-rear direction member F)
55 Fourth intermediate member (lateral member T)
56 Fifth intermediate member (lateral member T)
57 6th intermediate member (lateral member T)
58 7th intermediate member (lateral member T)
59 Outer frame member (horizontal member T)
60 Fixing member 61 Semi-cylindrical part 62 Stretched part 63 Stretched part

Claims (3)

A loading platform including a bottom plate having a cargo loading surface on which cargo is placed, and a beam structure located below the bottom plate and having a plurality of members for receiving a load applied to the bottom plate.
In the beam structure, the upper beam member located above and the lower beam member located below at the intersection of the two members are fitted at the portion of the fitting groove provided in one or both of them. Consists of
A fixing member fixed to both the upper beam member and the lower beam member at the intersection is provided .
Of the upper beam member and the lower beam member, the lower beam member is provided with the fitting groove.
The fixing member is in a state in which a semi-cylindrical portion having a vertically divided cylinder is extended in the axial direction of the cylinder along the direction in which the upper beam member is extended and covers the side surface of the upper beam member. Loading platform to have. The fixing member has a semi-cylindrical portion and a flat plate-shaped stretched portion extending from the semi-cylindrical portion to a side away from the intersection along the direction in which the upper beam member extends. The loading platform according to claim 1, wherein the width in the vertical direction becomes smaller as the distance from the intersection is increased. A work vehicle provided with the loading platform according to claim 1 or 2 on a traveling vehicle body.

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