JPH0966860A - Vehicle cab roof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure drainage and waterproofness through a simple structure, facilitate assemblying work and reduce component members by making effective utilization of the opening periphery of an outer roof constructed of inner and outer layers for preventing dew condensation. SOLUTION: A cab roof 30 is made of an outer roof 31 on the outside of the cab and an inner roof 32 on the inside of the cab, the outer roof 31 is formed with a hollow inner and outer layers, a sun roof 34 is fitted to an opening 35 provided on the inner roof 32 and the outer roof 31, and a gutter 36 is formed on the periphery of the opening 35 on an outer roof inner layer 31b. The periphery of the opening 35 of the outer roof inner layer 31b and the periphery of the opening 35 of the inner roof 32 are overlapped and a weatherstrip 47 abutting on the circumferential fringe of the sun roof 34 in a closed state is provided on the overlapped part 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a roof portion of a cab mounted on a vehicle such as a tractor.

[0002]

2. Description of the Related Art In a vehicle such as a tractor equipped with a cab, the roof of the cab is composed of an outer roof on the upper side (outdoor side) and an inner roof on the lower side (indoor side). There is also a cab roof provided with a sunroof in order to ensure ventilation and improve habitability.

[0003]

In the meantime, especially in winter, there is a problem that the temperature difference between the inside and the outside causes condensation on the inner side surface (lower surface) of the outer roof, which deteriorates the durability of electrical equipment such as an air conditioner. Occurs. As a method of solving such a problem, the outer roof is configured to have a hollow shape with two layers inside and outside, and the inside and outside of the outer roof are thermally insulated by an air layer inside the outer roof to prevent dew condensation on the inner side surface of the outer roof. Can be considered.

On the other hand, in order to attach the sunroof to the cab roof of the tractor, it is necessary to ensure drainage of rainwater around the sunroof and waterproofness when the sunroof is closed. If a gutter is attached as a separate member or a mounting bracket for attaching a sealing material for ensuring waterproofness is provided separately, the structure will be complicated and productivity will be deteriorated. Will be invited.

Therefore, according to the present invention, by effectively utilizing the opening edge portion of the outer roof having two layers, the inner and outer layers, to prevent dew condensation, drainage and waterproofing can be ensured with a simple structure. It is intended to facilitate the process and reduce the number of constituent members.

[0006]

According to the present invention, a roof of a cab mounted on a vehicle body is constituted by an outer roof on the outside and an inner roof on the inside, and the outer roof is formed in a hollow shape of two layers inside and outside. Thus, the hollow layer of the outer roof exerts a heat insulating effect even when a temperature difference occurs between the inside and the outside, prevents dew condensation on the lower surface of the outer roof, and prevents the sunroof mounting opening provided on the inner roof and the outer roof. The sunroof is attached to, the edge of the opening of the outer roof outer layer is formed in a gutter, the edge of the opening of the inner layer of the outer roof and the edge of the opening of the inner roof are polymerized, and the overlapping portion is formed. By installing a weather strip that abuts the peripheral edge of the sunroof in a closed state, the gutter and weather strip (seal material) mounting members can be separated. In addition to eliminating the need to provide it, the number of constituent members is reduced, the workability of assembling is facilitated, and the weather strip is also used as a sealing material for preventing rainwater and the like from flowing between the outer roof and the inner roof. .

By assembling the inner layer of the outer roof and the inner roof with a weather strip, the outer roof and the inner roof can be securely attached while reducing the number of components.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. A tractor 10 (agricultural vehicle) according to the embodiment of the present invention shown in FIG. 3 includes a pair of left and right front wheels (not shown) and a rear wheel 11, and also includes a diesel engine 12, a clutch housing 13, and a transmission case 14. A vehicle body 15 is configured by the above, and a cab 16 is mounted on an upper rear portion of the vehicle body 15.

The cab 16 is frame-structured by a cab frame 17. The cab frame 17 has a pair of left and right front columns 18, rear columns 19 and intermediate columns 20, as shown in FIG. , 19 and 20 are fixed at their upper ends to a substantially rectangular top frame 21, and their lower ends are fixed to a bottom frame 22, thereby forming a frame. Left and right fenders 23, a floor plate 24, and a seat plate 25 that cover the rear wheel 11 from above are provided below the cab frame 17, and a driver's seat is fixedly mounted on the seat plate 25. Further, the cab frame 17 is fitted with the front glass and the rear glass, and the rear side glass 26 is fitted as shown in FIG. 3, and further, the intermediate support column 20 is fitted with a pair of upper and lower hinges 27 to form a frameless tempered glass. The door 28 is pivotally attached. Each end of the long bar-shaped handrail 29 has a lower hinge 27 and a door 28.
The handrail 29 reinforces the door 28.

A roof 30 is provided above the cab 16, and as shown in FIG. 5, the roof 30 has an outer roof 31 on the outdoor side (upper side) and an inner roof on the indoor side (lower side). 32, and an air conditioner device 33 is disposed between the inner roof 32 and the outer roof 31.
An air introduction passage and an air discharge passage of the air conditioner device 33 are formed in the space therebetween.

The outer roof 31 is formed in a hollow shape of two layers inside and outside by blow molding, and the top frame 21 of the cab 16 is formed.
It is placed and fixed on. The inner roof 32 is formed of resin or the like in a thin plate shape, and is attached and fixed to the outer roof 31, the top frame 21, and the like. The outer roof 31 and the inner roof 32 are provided at the substantially central portions in the left-right direction,
As shown in FIGS. 1 and 2, the sunroof mounting opening 35 having a substantially rectangular shape in plan view, to which the sunroof 34 is attached,
It is formed to communicate with the inside and outside of the cab. Around the opening portion 35, the outer layer portion 31a and the inner layer portion 31b of the outer roof 31 are polymerized and fixed to each other to improve the mounting support strength of the sunroof 34 and prevent rainwater or the like from the opening portion 35 from adhering to the outer portion. The roof 31 is prevented from entering the inside.

A peripheral portion of the opening portion 35 of the outer roof outer layer portion 31a is formed in a gutter 36 extending over the entire length in the circumferential direction, and the opening portion 35 can be formed while reducing the number of components and the structure. Prevents rainwater from entering the cabin. A drainage channel 37 is provided on the upper surface of the roof 30 to connect at least one position in the circumferential direction of the gutter 36 to the front, rear, left, and right outer ends of the roof 30, and in the present embodiment,
A pair of left and right drainage channels 37 that communicate the rear side of the gutter 36 with the rear end of the roof 30 are provided. It should be noted that the gutter 36 and the drainage channel 37 are arranged so that the water accumulated in the gutter 36 is drained well.
The rear end side (drainage downstream side) is gradually lower than the front end side (drainage upstream side).

A sunroof 34 having a substantially rectangular shape in a plan view is openably and closably attached to the sunroof mounting opening 35. The front end of the sunroof 34 is the outer roof 3
1 and is gripped by a handle 38 provided on the lower surface of the sunroof 34, and is lifted up, as shown in FIG.
As shown by the two-dot chain line, the rear side can be opened and closed vertically. In addition, the cab frame 17 and the sunroof 34
The sunroof 34 can be held in an open state by a damper 39 provided between and, and the opening / closing operability is improved. Further, a locking portion 40 for locking is provided at the rear end portion of the sunroof 34, and the lock lever 41 provided on the cab frame 17 side is engaged with the locking portion 40 to keep the sunroof 34 in the closed state. It is made lockable.

A peripheral portion of the sunroof 34 is formed to be bent downward, and the bent portion 42 is located above the gutter 36 when the sunroof 34 is in a closed state shown by a solid line in FIG. Rainwater is flowing to the gutter 36. Sunroof 34 in the present embodiment
Is composed of an outer layer member 43 and an inner layer member 44, which are substantially rectangular plate-shaped, and has a hollow shape of two layers inside and outside. The inside air layer 45 insulates the inside and the outside, and the inside surface (lower surface) of the sunroof 34 Prevents condensation from forming. The outer layer member 43 and the inner layer member 44 are polymerized and fixed to each other in the vicinity of the peripheral edge portions.

As shown in FIGS. 1 and 2, the peripheral edge portion of the opening 35 of the outer roof inner layer portion 31b is projected more inward than the peripheral edge portion of the opening portion 34 of the outer layer portion 31a. Further, the peripheral edge of the opening 35 of the outer roof inner layer portion 31b and the peripheral edge of the opening 35 of the inner roof 32 are superposed and fixed, and the superposed portion 46 is formed.
The weather strip 47 is attached to the lower surface of the peripheral edge of the sunroof 34 in the closed state, and the weather strip 47 can be attached while reducing the number of components and simplifying the structure. Further, the weather strip 47 is also used as an assembly member for the inner layer portion 31b of the outer roof and the inner roof 32, so that the roofs 31 and 32 are securely attached while the number of constituent members is reduced.

As shown in FIGS. 6 and 7, the tractor 10 is provided with a door half-open lock device for locking the door 28 of the cab 16 in a half-open state, and the sunshine is strong from spring to autumn. In other seasons, when the air conditioner 33 is not operated, or when the air conditioner is not installed, the door 28 is locked in a half-opened state so that a large amount of outside air can be introduced into the room and is used as a substitute for the air conditioner.

The structure of the door half-open lock device will be described. At the front end of the door 28, an opening operation handle 51 is provided on the outer surface side.
And an inner lock 52 that is unlocked by operating the handle 51 is provided on the inner surface side. On the other hand, a mounting bracket 53, which is substantially L-shaped in plan view, is fixed to the front column 18 of the cab frame 17, and a striker with which the inner lock 52 engages with the outer surface of the mounting bracket 53 when the door 28 is closed. 54 is fixed by a fixture such as a pair of upper and lower bolts 55.

On the inner surface of the mounting bracket 53,
The holding bracket 56 is fixed by a pair of upper and lower bolts 55 that fix the striker 54. The holding bracket 56 has a flat plate rectangular shape, is fixed so as to project upward from the mounting bracket 53, and is provided with a boss portion 57 at the upper end portion. A rod-like half-opening striker 58 is rotatably held by the boss portion 57 so as to be positionally changeable between a storage position shown by a solid line and a use position shown by a two-dot chain line in FIG. An engaging portion 59 that engages with the inner lock 52 when the door 28 is half opened is provided at the tip of the half open striker 58.

When in the retracted position, the half-open striker 58 hangs downward from the boss 57 along the front strut 18 on the indoor side of the striker 54, and the door 2
It does not interfere with the opening / closing operation of 8 and getting on / off. A weather strip 60 is attached to the outer peripheral edge of the door 28, and when the door 28 is closed, the weather strip 60 is pressed against the cab frame 17 so that rainwater, dust, and the like can be discharged from the peripheral edge of the door 28 to the inside of the room. It keeps me from getting in. Further, as shown in FIG. 7, the windshield 61 is supported by the front support column 18 via a sealing material 62.

The fuel system piping of the tractor 10 is constructed as shown in FIG. That is, the tractor 10
Has a main fuel tank 70 inside the bonnet and an auxiliary fuel tank 71.
An oil inlet is provided at the upper part of each of 0 and 71, and an air intake is provided at this oil inlet. Both tanks 7
Pipes connected to the fuel pump 74 are connected to the lower portions of the tanks 0 and 71, and check valves 72 and 73 are provided in the middle of the pipes of the tanks 70 and 71 to prevent the fuel from flowing backward. Even when the vehicle body 15 is tilted on a sloping ground, the fuel is prevented from overflowing from the air intake port of the lower oil filling port of the tanks 70 and 71.

The fuel pump 74 is connected to the injection pump 75 through a pipe, and the fuel pumped by the injection pump 75 is vigorously injected into the combustion chamber by the fuel injector 76. This fuel injector 76 includes a fuel pump 74
A return pipe 78 connected to a pipe on the front side of the tank 70, 71 is provided for collecting excess fuel that has overflowed.
It is designed to be recycled without being returned to.

Therefore, the excess fuel that has overflowed is not returned to the tanks 70 and 71 and the amount of fuel in the tanks 70 and 71 does not increase.
It is possible to reliably prevent overflow from the air intake port of the 0,71 oil injection port. An air bleeding cock 77 is provided in the middle of the return pipe 78 so that the air in the fuel pipe can be easily bleeded.

The return pipe 78 may be connected to the main tank 70 as shown in FIG. Since other configurations are similar to those of FIG. 8, the same reference numerals are given and detailed description will be omitted. The present invention is not limited to the above embodiment, and the design can be changed as appropriate.

[0024]

As described above, according to the present invention,
The cab roof mounted on the vehicle body is composed of an outer roof on the outside and an inner roof on the inside, and the outer roof is formed in a hollow shape with two layers inside and outside, so even if there is a difference in temperature inside and outside The hollow layer of the roof has a heat insulating effect to prevent dew condensation on the lower surface of the outer roof, and the sunroof is attached to the sunroof mounting opening provided on the inner roof and the outer roof, and the edge of the opening of the outer roof outer layer is attached. Since the part is formed in the gutter, it is possible to prevent rainwater from flowing in from the sunroof mounting opening while reducing the number of components,
Since the edge portion of the opening portion of the inner layer of the outer roof and the edge portion of the opening portion of the inner roof are overlapped with each other, and the weather strip is attached to the overlapping portion, the weather strip being in contact with the peripheral edge portion of the sunroof in a closed state. Eliminating the need to provide a separate mounting member for the seal material) and reducing the number of components
In addition to facilitating the assembling workability, the weather strip can also be used as a sealing material that prevents rainwater or the like from flowing between the outer roof and the inner roof.

Further, since the inner layer of the outer roof and the inner roof are assembled by the weather strip, both the roofs can be surely assembled while reducing the number of constituent members.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 2, showing a cab roof structure according to an embodiment of the present invention.

FIG. 2 is a plan view of the same cab roof structure.

FIG. 3 is a side view of the vehicle according to the embodiment.

FIG. 4 is a perspective view showing a cab frame of the vehicle.

FIG. 5 is a simplified end view corresponding to a cross section taken along the line BB of FIG. 2, which schematically shows the cab roof structure according to the embodiment.

FIG. 6 is a front view of the door half-open lock device.

FIG. 7 is a plan view of the door half-open lock device.

FIG. 8 is a circuit diagram showing a fuel system pipe.

FIG. 9 is a circuit diagram showing another fuel system pipe.

[Explanation of symbols]

 10 Vehicle (tractor) 15 Car body 16 Cab 30 Roof 31 Outer roof 31a Outer layer 31b Inner layer 32 Inner roof 34 Sunroof 35 Sunroof mounting opening 36 Gutter 46 Overlap (weatherstrip attachment) 47 Weatherstrip (sealant)

Claims (2)

[Claims] 1. A cab (1) mounted on a vehicle body (15)
The roof (30) of 6) is replaced with the outer roof (3
1) and the inner roof (32) on the indoor side, the outer roof (31) is formed in a hollow shape of two layers, the inner roof (32) and the sun roof mounting opening provided on the outer roof (31). The sunroof (34) is attached to the part (35), and the outer roof outer layer (31
The edge part of the said opening part (35) of a) is formed in a gutter (36), and the said opening part (3) of an inner layer (31b) of an outer roof is formed.
5) and the opening (3) of the inner roof (32).
A cab roof structure for a vehicle, characterized in that a weather strip (47) that abuts against a peripheral portion of the sunroof (34) in a closed state is attached to the overlap portion (46) by overlapping the edge portion of 5). 2. The cab roof structure for a vehicle according to claim 1, wherein the outer roof inner layer (31b) and the inner roof (32) are assembled by a weather strip (47).