JPS592976Y2 - Vehicle exhaust pipe structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an exhaust pipe structure for a vehicle in which a worker must work at the rear of the vehicle, such as a garbage collection vehicle of the pier loader type.

For example, in vehicles where workers work at the rear of the vehicle, such as rear-loader garbage trucks, if the exhaust pipe opens at the rear of the vehicle like a regular car, the workers may inhale exhaust gas while working. This is extremely undesirable from a health standpoint.

Furthermore, according to the regulations, it is prohibited for automobile exhaust pipes to open downward or to the left or right, and as mentioned above, in vehicles where it is not desirable to have the exhaust pipe open rearward at the bottom of the vehicle body, the exhaust pipe should be opened from the ceiling of the vehicle body. There is no choice but to make it stand up to the top and exhaust gas from above.

However, for those that emit exhaust air above the unit,
Rainwater, etc. inevitably enters the exhaust pipe through that opening,
Not only does it accumulate in the bent part of the rising base of the exhaust pipe and inside the muffler, causing corrosion of the iron parts, but also when the engine is started, the thick graphite water that has accumulated inside the exhaust system is discharged, causing damage to the car body, cargo box (dust collection area), etc. There are many inconveniences such as staining the box) etc.

Particularly in vehicles such as garbage collection trucks that travel in urban areas and are closely connected to people's daily lives, it is extremely undesirable if the vehicle body etc. becomes dirty due to the discharge of graphite water, as it gives residents a sense of discomfort and uncleanness.

The present invention is aimed at preventing various problems in vehicles having a rising exhaust pipe as described above, particularly the problem of discharge of waste water, and will be described below with reference to a floor embodiment.

In FIG. 1, reference numeral 1 denotes an exhaust pipe. The exhaust pipe 1 rises upward at the rear of the driver's cab, and exhaust gas is discharged from an opening 1a at the tip of the upwardly rising portion of the exhaust pipe.

2 is a muffler device having a function of capturing and discharging rainwater etc. that has entered through the opening 1a, as shown in FIGS. 2 and 3,
The inside of the cylindrical case 3 is divided into two chambers 5 and 6 parallel to the flow of exhaust gas by a perforated plate 4 having many through holes 4a.

And one chamber 5 has an upper rising exhaust pipe 1 and a lower pipe 1.
The tip of the upper tube 1C penetrates the lower end surface 3a of the case 3 and opens into the other chamber 6, and the lower end opening of the upwardly rising upper tube 1C penetrates the upper end surface 3b of the case 3 and opens into the other chamber 6.

A drain 7 is provided on the lower end surface 3a of the case of the chamber 6 where the upper rising pipe 1C is open, and rainwater, etc. that enters the chamber 6 from the upper opening 1a of the upper rising pipe 1C is drained from the upper rising pipe 1C. It can be discharged to the outside from a drain 7 at the bottom.

In the above configuration, the exhaust gas rises upward and the downward pipe 1
It enters the chamber 5 from b and expands there, and then is squeezed while passing through the through hole 4a of the perforated plate 4, and then enters the chamber 6 and expands again, gradually decreasing the pressure and temperature. When the sound silencing function is achieved, the sound rises in the L direction and is discharged to the outside through the upper pipe 1C.

On the other hand, rainwater that has entered through the opening 1a flows down to the bottom of the chamber 6 and is discharged from the drain 7 to the outside.

In this case, since the chamber 6 is partitioned parallel to the chamber 5 on the left and right by the perforated plate 4, rainwater etc. flowing down inside the chamber 6 will never enter the chamber 5 side, and therefore will not flow into the lower pipe 1b. There is no inflow at all, and all of it is discharged to the outside through the drain 7 without any accumulation in the chamber 6.

Furthermore, even if some sewage remains at the bottom of chamber 6,
The exhaust gas that entered the chamber 5 changes its direction at right angles as shown by the arrow and flows into the chamber 6, and then changes its direction and flows into the perforated plate 40.
Since the air is discharged to the outside from the upper pipe 1C of the through hole 4, the lower bottom of the chamber 6 is not directly exposed to a strong exhaust flow.
Therefore, there is no risk of sewage accumulated at the bottom being blown up.

As described above, according to the present invention, it is possible to capture and discharge all the rainwater that has entered through the opening at the upper end of the exhaust pipe with an extremely simple configuration, and to prevent rainwater from accumulating in the exhaust system. It can completely prevent the discharge of graphite water, and together with its simple structure and low cost, it can bring great practical value.

[Brief explanation of drawings]

Figure 1 is a side view of the entire vehicle showing an embodiment of the present invention;
The figure is an enlarged detailed sectional view of a part of the muffler in Figure 1,
The figure is a sectional view taken along the line X--X in FIG. 2. 1...exhaust pipe, 1a...opening, 1b
...Upper rising downward pipe, 1C...Upper rising upward pipe, 2...Muffler device, 3.
...Case, 4...Perforated plate, 5,6...
...Chamber, 7...Drain.

Claims (1)

[Scope of utility model registration request] In a vehicle, such as a garbage collection vehicle, in which the exhaust pipe rises upward toward the upper part of the vehicle body and exhaust gas is discharged above the vehicle body, a perforated plate 4 is provided inside the cylindrical case 3 to extend the exhaust pipe upward. A chamber 5 in which the tip of the rising downward tube 1b opens and a chamber 6 in which the lower end of the rising upward tube 1C opens are formed in parallel on the left and right, and a drain 7 is provided at the bottom of the iron part 6. A vehicle exhaust pipe structure characterized by: