JP3722341B2 - Cab ventilator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cab ventilating device, and more particularly, a cab ventilating device comprising a door having an exhaust opening at a lower end side that can be freely opened and closed on the side of the cab and further provided with a step formed below the door. About.
[0002]
[Prior art]
A cab is attached to the front end of the truck frame, and a driver seat and a passenger seat are provided in the cab. The driver sits in the driver's seat and operates the steering wheel to drive the truck.
[0003]
In order to prevent the atmospheric pressure in the cab from becoming abnormally high, for example, as disclosed in Japanese Utility Model Publication No. 57-79006, a ventilator is provided on a door that is openably and closably attached to the side of the cab. Yes. In other words, a laterally long opening is formed in the door inner panel, and an extractor grill is attached to such a laterally long opening, whereby the interior space of the door, i.e., the space between the inner panel and the outer panel of the door is set in the cab. I try to communicate. However, an exhaust port is formed at the bottom of the door. Therefore, the space in the cab is communicated with the outside through the opening and the exhaust opening of the door where the extractor grill is mounted, and such a communication mechanism can absorb the difference in atmospheric pressure inside and outside the cab. become.
[0004]
Further, as disclosed in Japanese Utility Model Registration Publication No. 2566283, a side plate and a step cover are attached to the side portion of the cab and below the door, and the step cover is further covered. Steps are attached as described above, and the steps allow passengers to get in and out of a relatively high cab.
[0005]
[Problems to be solved by the invention]
Thus, according to the cab in which the ventilator is provided in the cab door part, the side plate and the step cover are attached to the lower side, and the step is attached so as to be covered by the step cover, the step is covered. An air passage that flows upward is formed inside the step cover, and such an air passage communicates with the exhaust port of the door. Accordingly, air flows between the door inner panel and the outer panel through the air passage through the air passage due to the air flow generated inside the step cover particularly during traveling, and this air further enters the cab. there is a possibility.
[0006]
In particular, when the temperature inside the cab is maintained at an appropriate temperature by an air conditioner, such as when the cab is cooled or heated, the vehicle interior is The air-conditioning effect of the vehicle is impaired, causing a deterioration in the comfort of the passenger compartment.
[0007]
The present invention has been made in view of such problems, and in particular, the wind blowing from the lower side of the door through the inside of the step cover is prevented from entering the cab through the exhaust port of the door. The object is to provide a cab ventilation system.
[0008]
[Means for Solving the Problems]
The present invention is opened and closed with the opening is formed on the inner surface, have a outlet to the lower side, the side surface opening formed on the side of the door interior space that has become the air passage of the track cab The upper and lower steps are arranged in two upper and lower steps , and are attached to the side plate of the cab so as to cover the vicinity of the two steps. In the cab ventilator with a step cover attached to the side of a two-step step ,
The upper end of the step cover is substantially in contact with the outside of the upper step, the lower end side of the step cover is curved inward so as to put the foot on the lower step, and the inner surface of the step cover is It is designed to form a curved side wall with respect to the lower space,
A baffle plate that suppresses the flow of air in the space below the door and communicated with the exhaust port of the door inside the step cover is fixed to the side plate of the cab to which the step cover is attached. relates ventilator cab, characterized in that the mounting so that the lower side of the upper step.
[0009]
Here, the baffle plate may be composed of a flange formed integrally so as to be bent inward from the upper end side of the step cover. Alternatively, a second baffle comprising a first baffle plate fixed to a side plate of a cab to which the step cover is attached and a flange integrally formed so as to be bent inward from the upper end side of the step cover. A labyrinth effect may be generated by the first baffle plate and the second baffle plate.
[0010]
In a preferred embodiment of the present invention, in a cab ventilation device particularly in a cab over type truck, a baffle plate is installed in a path of wind blowing from the lower side of the door, and the baffle plate suppresses the wind from the lower side, It is designed to prevent the intrusion of wind into the internal space between the inner panel and the outer panel of the door and into the cabin of the cab, particularly to suppress the wind blowing from the lower side of the door. This is to prevent the entry of a draft into the room. Here, especially by preventing the inside of the cold air door and the inside of the cab from entering, the air conditioning effect of the cab is not impaired.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a truck cab 10 having a cab ventilation device according to an embodiment of the present invention. The cab 10 is attached to a part of the front end side of the truck frame, and a driver seat and a passenger seat are provided therein. A side opening 11 is formed on the side of the cab, and a door 12 is attached so as to cover the side opening 11 so as to be freely opened and closed. The door 12 has a front end portion attached to the cab 10 via a hinge.
[0012]
The door 10 is configured such that an inner panel and an outer panel are arranged to face each other with a predetermined space therebetween, and both are joined and fixed at the peripheral edge portion, and constitutes a flat hollow box.
[0013]
FIG. 2 shows an inner panel 15 of such a door 12, and a pair of horizontally long openings 16 are formed in the inner panel 15 on the rear side, and an extractor grill 17 is attached to the horizontally long openings 16. ing. The extractor grill 17 is made of a synthetic resin molded body, and constitutes a decorative plate that covers the peripheral edge of the horizontally long opening 16. A plurality of exhaust ports 18 are arranged side by side on the bottom side of the inner panel 15 (see FIGS. 4 to 6). When the door 12 is closed, the inner panel 15 contacts the cab-side weather strip 19 to close the opening 11 as shown in FIGS. 4 and 5. In this part, the side opening 11 is closed in an airtight state by the door 12.
[0014]
A side plate 22 is attached to the side of the cab 11 below the door 12 as shown in FIGS. The side plate 22 is joined to the folded portion on the side surface side of the floor panel 21 of the cab 10. A step cover 23 is attached to the side plate 22. The step cover 23 is made of a synthetic resin molded body, and steps 25 and 26 are attached to the upper and lower stages on the step cover 23. Steps 25 and 26 are formed by aluminum die casting and have a large number of small openings. A fender 27 is attached to the side of the side plate 22 on the rear side of the step cover 23 as shown in FIGS.
[0015]
Further, in the present embodiment, the baffle plate 31 as shown in FIG. 4 is attached to the mounting seat portion on the lower end side of the side plate 22 so as to extend inside the step cover 23 to which the steps 25 and 26 are attached. Can be installed. The baffle plate 31 extends in a direction crossing the air passage inside the step cover 23, thereby preventing the air from flowing upward.
[0016]
In the above configuration, when the air pressure in the cab 10 is greatly different from the outside of the cab 10, it passes through the horizontally long opening 16 and the exhaust port 18 formed in the inner panel 15 of the door 12. It becomes possible to absorb the pressure difference between the inside and outside of the cab 10, whereby the atmospheric pressure inside the cab 10 can be maintained at an appropriate value.
[0017]
In addition, even if the wind accompanying the travel attempts to flow upward from below through the inside of the step cover 23 as indicated by the arrow in FIG. 4, the baffle plate 31 positioned inside the step cover 23 moves the above wind flow. Will be blocked. Accordingly, it is possible to prevent the wind from the lower side from entering the cab 10 through the upper step 25 made of aluminum die cast and having a large number of small openings and the exhaust port 18 of the door 12.
[0018]
As described above, according to the present embodiment, in the cab-over type truck, the baffle plate 31 is arranged in the path of the wind that blows from the lower side of the door 12 to suppress the wind from the lower side. The wind is prevented from entering.
[0019]
The mounting structure of the steps 25 and 26 on the lower side of the door 12 of the cab-over truck as shown in FIG. 1 is as shown in FIG. One of the wind paths around the door 12 and steps 25 and 26 having such a configuration is a path that blows up from the inside of the step cover 23 to the lower surface of the door 12.
[0020]
At this time, when the exhaust port 18 is formed in the inner panel 15 of the door 12 as shown in FIG. 2, the wind passing through the path from the lower side enters the inside of the door 12 through the exhaust port 18. There is a fear. Then, such wind further enters the cab 10 through the horizontally long opening 16 on which the extractor grill 17 is mounted.
[0021]
In the present embodiment, the baffle plate 31 is arranged in the wind passage to suppress the intrusion of the wind, and the intrusion of the wind from the exhaust port 18 of the inner panel 15 of the door 12 is prevented. is there. Therefore, in the cab-over type truck, the wind blown from the lower side of the door 12 is suppressed by the baffle plate 31, and it becomes possible to prevent the inside of the door 12 and the cab 10 from entering, particularly cold air. It becomes possible to prevent a change in temperature and to prevent adverse effects on the operation of the air conditioning.
[0022]
Next, another embodiment will be described with reference to FIG. In this embodiment, the first baffle plate 31 is attached to the side plate 22 inside the step cover 23, and another baffle plate 32 made of a flange folded inward is provided at the upper end of the step cover 23. It is a thing. That is, another baffle plate 32 is provided so as to protrude from the opposite direction to the baffle plate 31. Accordingly, the two baffle plates 31 and 32 are arranged on the lower side of the step 25 so as to extend from opposite directions.
[0023]
According to such a structure, since the two baffle plates 31 and 32 are arranged in the wind passage inside the step cover 23 and project from the opposite directions, a labyrinth effect is produced. This makes it possible to more reliably suppress the wind blowing from the lower side.
[0024]
In the above two embodiments, steps 25 and 26 are attached to the lower side of the door 12 via the step cover 23. However, steps 25 and 26 are attached to the side plate 22 independently of the step cover 23. You may do it. Alternatively, the steps 25 and 26 may be formed integrally with the step cover 23 with a synthetic resin.
[0025]
【The invention's effect】
The present invention as described above, an opening is formed on the inner surface, have a outlet at the lower end, an internal space is formed a door that has become the air passage on the side of the track of the cab side surface The opening is attached so as to be openable and closable, and the step having the opening formed below the door is arranged in two upper and lower steps, and is attached to the side plate of the cab so as to cover the vicinity of the two steps. In a cab ventilator with a step cover attached to the sides of the upper and lower steps , the step cover is such that the upper end of the step cover is almost in contact with the outside of the upper step and the foot is placed on the lower step. lower side is inwardly curved, inner surface of the step-cover are adapted to form a side wall which is curved relative to the lower space of the vehicle, an inner step cover door Those on the mounting so that the lower side of the upper step in a state where a baffle plate is fixed to the side plates of the cab which is mounted a step cover to suppress the flow of air in the lower space of the door communicating with the exhaust port It is.
[0026]
Accordingly, the baffle plate prevents the wind from entering the cab through the ventilator, particularly from below the door. Therefore, the intrusion of wind into the cab is effectively prevented without impairing the pressure adjustment function of the ventilation device.
[0028]
When the baffle plate is composed of a flange that is integrally formed so as to be bent inward from the upper end side of the step cover, the baffle plate composed of such a flange prevents the entry of wind from below. become.
[0029]
A first baffle plate fixed to the side plate of the cab to which the step cover is attached, and a second baffle plate comprising a flange integrally formed so as to be bent inward from the upper end side of the step cover. However, according to the configuration in which the labyrinth effect is generated by the first baffle plate and the second baffle plate, the wind blowing upward is more reliably suppressed by such a labyrinth effect.
[Brief description of the drawings]
FIG. 1 is a side view of a cab of a truck.
FIG. 2 is a perspective view of an inner panel of a door.
FIG. 3 is an exploded perspective view showing attachment of a step.
4 is a cross-sectional view taken along line AA in FIG. 1. FIG.
5 is a cross-sectional view taken along line BB in FIG.
6 is a cross-sectional view taken along line C-C in FIG.
FIG. 7 is a longitudinal sectional view similar to FIG. 4 of another embodiment.
[Explanation of symbols]
10 Cab 11 Side opening 12 Door 15 Inner panel 16 Horizontal opening 17 Extractor grill 18 Exhaust port 19 Weather strip 21 Floor panel 22 Side plate 23 Step cover 25 Step (upper)
26 steps (bottom)
27 Fender 31 Baffle plate 32 Flange (baffle plate)

Claims (3)

An opening is formed on the inner surface, have a outlet to the lower side, the side surface opening formed on the side of the door interior space that has become the air passage of the track cab to cover openably The upper and lower two-steps are attached to the cab side plate so as to cover the vicinity of the two-steps , and the steps having the openings formed below the doors are arranged in the upper and lower steps. In the cab ventilator with a step cover attached to the side of
The upper end of the step cover is substantially in contact with the outside of the upper step, the lower end side of the step cover is curved inward so as to put the foot on the lower step, and the inner surface of the step cover is It is designed to form a curved side wall with respect to the lower space ,
A baffle plate that suppresses the flow of air in the space below the door and communicated with the exhaust port of the door inside the step cover is fixed to the side plate of the cab to which the step cover is attached. ventilator cab, characterized in that the mounting so that the lower side of the upper step.   2. The cab ventilation device according to claim 1, wherein the baffle plate is formed of a flange integrally formed so as to be bent inward from an upper end side of the step cover.   A first baffle plate fixed to a side plate of a cab to which the step cover is attached, and a second baffle plate comprising a flange integrally formed so as to be bent inward from the upper end side of the step cover; The cab ventilator according to claim 1, wherein a labyrinth effect is produced by the first baffle plate and the second baffle plate.

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