JPH10273070A - Roof made of resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent rain water stuck to the overhang part of a hollow roof from sticking to the window glass and the like of a cabin by providing an overhang part projecting outward from the fixed part to the cabin, and providing a weir part constituted of at least either a linear projection and a groove on the underside of the overhang part. SOLUTION: In a roof made of resin fixed to a vehicle body frame 7, a first plane 32 of a rearwaid overhang part 3 is projected outward from a rear glass 72. Consequently by the rearward overhang part 3, incidence of the sunlight into the cabin through the rear glass 72 is restrained, and hence the interior of the cabin can be maintained to be comfortable environment. At rainy weather, rain water stuck to the roof flows on the sides of the rear overhang part 3 so as to reach the first plane 32, but it is difficult to move up to the inside exceeding a groove 30, and hence the rain water is collected on the extreme end side from the groove 32 of the first plane part 32 so as to become large water drops and fall down.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin roof used as, for example, a cabin roof of an industrial vehicle, and more particularly, to a hollow roof for preventing rainwater from adhering to a window glass of a cabin and obstructing a view. A resin roof.

[0002]

2. Description of the Related Art In recent years, industrial vehicles such as tractors having a cabin have been increasing in order to secure work comfort and occupant safety. And naturally the roof is used to keep rainwater out of the cabin. As the roof, a resin roof is used from the viewpoint of weight reduction. As a cabin structure using this resin roof, for example, a structure as shown in FIG. 5 is known.

In this cabin structure, a box-shaped roof 100 formed by vacuum forming is mounted on a frame 200 of a vehicle body.
Is secured to the flange 201 extending from the roof 100 with bolts 202 and the sealing material 203 is sandwiched between the roof 100 and the frame 200 to ensure the sealing performance. However, in recent years, it has been formed by hollow molding methods such as twin composite molding, blow molding, rotational molding, etc., because it has a higher degree of design freedom compared to vacuum molded products, and the hollow part can be used as an outside air introduction duct. The use of a hollow resin roof has been studied.

As a cabin structure having such a hollow roof, a structure in which a nut is held inside the roof by caulking or the like and the roof is fixed to a frame by bolts is considered.

[0005]

In general, the roof of the cabin is provided with a protruding portion projecting from the cabin in order to prevent sunlight from entering the cabin. However, although the overhang prevents sunlight from entering, the hollow roof has a problem due to rainwater.

That is, since the roof formed by vacuum forming has a plate shape, as shown in FIG.
The lower end surface 111 of the ten can be easily positioned away from the frame 200. Therefore, by doing so, the rainwater adhering to the roof 100 accumulates on the lower end surface 111 of the overhanging portion 110 and drops as water droplets from the lower end surface 111, so that it is prevented from adhering to the window glass of the cabin or the like. Is done.

However, in the case of a hollow roof, since the overhang is also hollow, the lower surface of the overhang is generally flat. For this reason, rainwater adhering to the roof may flow down the lower surface of the overhang as water droplets, and may adhere to the window glass of the cabin. If water droplets adhere to the window glass or the like in this manner, raindrops may obstruct the view, which may hinder the operation.

The present invention has been made in view of such circumstances, and has as its object to prevent rainwater adhering to an overhanging portion of a hollow roof from adhering to a window glass or the like of a cabin.

[0009]

A feature of the resin roof according to the first aspect of the present invention is that it is a hollow resin roof fixed to a cabin and used as a roof of the cabin. An overhanging portion protrudes outward from the fixing portion, and at least a part of a lower surface of the overhanging portion has a weir portion formed of at least one of a ridge and a groove.

The resin roof according to the second aspect is characterized in that in the resin roof according to the first aspect, the weir portion is formed at the time of forming the overhang portion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In a resin roof according to the present invention, a weir portion comprising at least one of a ridge and a groove is formed on at least a part of a lower surface of an overhang portion. For example, when the weir is a ridge, the rainwater at the tip of the ridge becomes the lowermost end of the ridge, and the rainwater attached to the overhang collects at the tip of the ridge to form a water drop of a predetermined weight and falls downward from the ridge tip.

When the weir is a groove, the rainwater that flows along the lower surface of the overhang and flows inward from the tip becomes difficult to flow inward from the groove, and the surface between the groove and the tip becomes difficult. And fall down from there. In other words, rainwater flowing along the lower surface of the overhang is difficult to get over the weir consisting of the ridge or groove,
It is prevented from flowing over the weir and further inside. This prevents rainwater from traveling along the lower surface of the overhanging portion and attaching to the windshield or entering the inside of the cabin along the cabin wall surface.

It is preferable that the weir portion is provided near the tip of the overhang portion that is far from the fixing portion. If provided at a position close to the fixed portion, water drops dropped from the lowermost end may adhere to a windshield or the like due to a force such as wind. Also, a plurality of weirs may be provided between the tip of the overhang and the fixed part. In addition, as a weir part, since a partial convex part is not preferable in appearance in many cases, it is desirable to use a groove rather than a ridge.

The resin roof of the present invention can be manufactured by a molding method such as twin composite molding, blow molding, and rotational molding in which the upper half and the lower half are molded and then integrated. It is desirable that the dam portion is formed simultaneously with the formation of the overhang portion. According to the above-described molding method, the inside of the cavity can be easily formed with the dam portion and can be formed integrally with the overhang portion, so that the number of steps can be reduced.

As the material of the resin roof of the present invention, polypropylene, AES (acrylonitrile, EPDM,
Styrene copolymer resin), nylon and the like can be used without particular limitation.

[0016]

The present invention will be described below in detail with reference to examples. FIG. 1 is a plan view of a resin roof according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of the roof just before being assembled to a cabin. This roof made of resin is manufactured from AES resin by twin composite molding, and has a rectangular central portion 1 covering the cabin, a front projecting portion 2 projecting forward from the central portion 1, and a rearward portion from the central portion 1. And a right overhanging portion 4 projecting rightward from the central portion 1 and a left overhanging portion 5 projecting leftward from the central portion 1.

The central portion 1 and each overhanging portion are formed of a pair of front and back moldings 10, 11, and the central portion 1 is provided with a plurality of welding portions 12 in which the pair of front and back moldings 10, 11 are partially welded. Is formed. The strength of the resin roof is ensured by the welded portion 12, and hollow portions 13 communicating with each other are formed in portions other than the welded portion 12. A pair of openings 14 are formed in the molded body 10 facing the cabin side of the central portion 1, and an air outlet and an inside air intake of an air conditioner (not shown) are connected to the bottoms of the pair of openings 14, respectively. The duct of the air conditioner is piped using the hollow portion of each overhanging portion, and the pair of openings 14 function as an inside air inlet for supplying room air to the air conditioner and an outlet for air from the air conditioner.

The front projecting portion 2, the rear projecting portion 3, the right projecting portion 4 and the left projecting portion 5 are each formed in a hollow shape, and have grooves 20 and 30 near their respective leading edges on their lower surfaces. , 40, 50 are formed substantially parallel to the respective ends. Also, each hollow part,
It communicates with the hollow portion of the adjacent overhanging portion and also communicates with the hollow portion 13 of the central portion 1.

An opening 5 is provided in a part of the left overhang portion 5.
1 is formed, and the bottom of the opening 51 is communicated with an outside air suction portion of an air conditioner (not shown). That is, the opening 51 functions as an outside air inlet of the air conditioner. The resin roof is fixed to a metal body frame of the cabin. The structure will be described with reference to FIG. The structure of the other overhanging portions has almost the same configuration.

The rear projecting portion 3 has a hollow portion 31 inside, and a lower surface thereof has a first flat surface 32 from the end side and a second lower surface which is continuous from the first flat surface 32 with a step and lower than the first flat surface 32. A plane 33 and a third plane 34 which is continuous with the second plane 33 with a step and have an intermediate height between the first plane 32 and the second plane 33 are formed. In the first plane 32, a groove 30 is formed near the end and extending in parallel with the end.

A plurality of through holes 35 are formed in the lower surface of the rear projecting portion 3 and the central portion 1. A nut 6 projecting toward the hollow portion 31 is engaged and fixed to the through hole 35. The nut 6 is, for example, the third plane 3
As shown in FIG. 3, a portion provided in the cylinder 4 has a cylindrical portion 60 having a female thread, a first flange portion 61 on both sides of the through hole 35, and a second flange portion 61 projecting radially outward from the through hole 35.
It has a flange portion 62, and is fixed by sandwiching the third plane 34 between the first flange portion 61 and the second flange portion 62.

The nut 6 was fixed as follows. First, the nut 6 is supplied without the second flange portion 62, and the cylindrical portion 60 is inserted into the through hole 35 from the outside to make the first flange portion 61 abut on the third flat surface 34. In this state, when the jig is inserted into the nut 6 and the nut 6 is compressed in the axial direction in a state where the nut 6 is engaged with the opening end of the cylindrical portion 60,
A portion corresponding to the second flange portion 62 formed in advance in a thin thickness swells and deforms outward, the second flange portion 62 is formed, and the third flat surface 34 is formed by the first flange portion 61 and the second flange portion 62. The nut 6 is clamped and fixed.

The vehicle body frame 7 having a U-shaped cross section abuts on the third flat surface 34.
Is fixed to the third plane 34. Note that an inner roof 8 is disposed on a portion of the body frame 7 opposite to a portion in contact with the third plane 34, and the inner roof 8 is fixed to the body frame 7 by bolts 70.

A rear glass 72 is fixed to the body frame 7 in advance, and the rear glass 72 abuts on a step surface between the first plane 32 and the second plane 33 with the body frame 7 fixed to the third plane 34. A sealing material 7 made of foamed butyl rubber is provided between the body frame 7 and the second plane 33.
1 is interposed and the sealing material 71 is compressed, whereby a sealing effect is exhibited.

In the resin roof fixed to the vehicle body frame 7 as described above, the first plane 32 projects outward from the rear glass 72 at the rear overhanging portion 3. Therefore, the rear overhanging portion 3 suppresses sunlight from entering the cabin through the rear glass 72, and can maintain a comfortable environment in the cabin. The rainwater adhering to the roof in rainy weather etc.
Flows on the side of the first plane 32 to reach the first plane 32, but it is difficult to move inward beyond the groove 30, so that rainwater collects on the tip side of the groove 30 of the first plane 32 and becomes large water droplets. And fall down. Therefore, since the distance between the drop start point of the water droplet and the rear glass 72 is sufficiently large, the water droplet is prevented from adhering to the rear glass 72, and the visibility can be maintained well.

In the front overhang 2, the presence of the groove 20 prevents water droplets from adhering to the windshield, and the right overhang 4 and the left overhang 5 have grooves 40 and 50. The presence prevents water droplets from adhering to the side window glass. Further, even in a portion where no glass exists, the presence of the groove prevents water droplets from adhering to the wall surface of the cabin, thereby preventing water droplets from entering the vehicle interior along the wall surface.

Furthermore, the presence of the grooves 20, 30, 40, 50 further enhances the strength of each overhang. Further, the rigidity of the front overhanging portion 2 and the rear overhanging portion 3 is increased by the presence of the grooves 20, 30, so that the cross-sectional linearity of the molded body 10 is improved, and the effect of improving the building and sealing with glass is obtained. (Embodiment of the embodiment) In the above embodiment, the grooves 20, 30, 40,
Although 50 is provided, as shown in FIG. 4, it is also possible to form a ridge 36 along the end of the overhang instead of the groove. In this case, for example, it is difficult for the rainwater transmitted along the side wall of the rear overhanging portion 3 to get over the ridge 36, and
Water droplets can be prevented from adhering to the rear glass 72 as in the case of 0.

[0028]

According to the resin roof of the present invention, since the starting position where rainwater falls as water droplets is located at or outside the weir, the weir is located away from the window glass. By forming, it is possible to prevent water drops from adhering to the window glass, and it is possible to maintain good visibility.

[Brief description of the drawings]

FIG. 1 is a plan view of a resin roof according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a state immediately before fixing a resin roof according to an embodiment of the present invention to a cabin, and is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged sectional view of a main part of FIG. 2;

FIG. 4 shows another embodiment of the present invention, and is a sectional view of an essential part corresponding to FIG.

FIG. 5 is a cross-sectional view of a main part showing a conventional resin roof fixed to a cabin.

[Explanation of symbols]

1: Central part 3: Rear overhang
6: Nut 7: Body frame 30: Groove (dam)
72: Rear glass

Claims (2)

[Claims] 1. A hollow resin roof fixed to a cabin and used as a roof of the cabin, the roof having a projecting portion projecting outward from a fixing portion with the cabin, and at least one of lower surfaces of the projecting portion. A resin roof, wherein the portion has a weir portion comprising at least one of a ridge and a groove. 2. The resin roof according to claim 1, wherein the weir is formed at the time of molding the overhang.