JP2002188181A - Air purifier in cab of construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with wearing of a dust prevention mask and create comfortable work environment by purifying the air in a driver's cab. SOLUTION: An air purifier in the cab of construction equipment is provided with a casing 12 arranged outside the cab 2 in the construction equipment and forming an outside air take-in port and an air supply port 28 communicating with outside air and the inside of the driver's cab 2, filters 14, 16 for removing dust arranged on an outside air take-in side inside the casing 12, and an air supply fan 18 arranged on rear surfaces of the filters 14, 16 by directing an air take-in port 18a and a blow-out port 18 toward filter sides and the air supply port 28 on a driver's cab side, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air purifying apparatus for purifying air in a cab of a construction machine used in an air environment such as in a tunnel.

[0002]

2. Description of the Related Art The cab of a construction machine used in a tunnel pit generally has a closed room space separated from the outside, but requires external air circulation. When the mine is opened, dust and exhaust gas from the mine enter the cabin and must work in a contaminated atmosphere.

[0003] Therefore, when operating a construction machine in a tunnel mine, an operator must wear a dust mask. One type of dust mask is a dust mask with an electric fan, which has a dust repair efficiency of 99.8%.
That is all, because air is sent by the electric fan,
There are advantages such as easy breathing even in a workplace where the amount of exercise is large.

[0004]

However, since this mask is used by mounting a mechanical part such as an electric fan on a backrest, it is troublesome to wear it all the time. Yes, it was not always convenient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a comfortable working environment by eliminating the need for wearing a dust mask or the like by purifying air in a cab. An object of the present invention is to provide a purification device in a cab of a construction machine that can be used.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention forms an outside air intake port and an air supply port which are arranged inside or outside a cab of a construction machine and communicate with outside air and the cab. A casing, a dust removal filter inside the casing and disposed on the outside air intake side, disposed on the back of the filter, the air intake port on the filter side, and the outlet port on the cab side air supply port. And an air supply fan disposed toward the air supply fan. Therefore, in the present invention, in a state where the operation is performed with the cab door and the window closed, the clean air removed by the filter is supplied into the cab, so that the working environment can be improved.

[0007] Further, according to a second aspect of the present invention, the filter comprises: a first filter arranged at an outside air intake;
A second filter is provided separated from the first filter by a predetermined distance, and a suction port for air circulation communicating with the cab side is opened in an empty space formed between the two filters. As a result, dust that has entered the inside of the driver's cab each time the door or window is opened and closed is also removed, so that cleaning can be maintained.

[0008]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a shovel car for working in a tunnel mine to which the present invention is applied. The shovel car includes an upper cab 2 of a caterpillar traveling device 1 and a machine room 3 integrated with a rear portion thereof in a conventional manner. It is arranged so as to be able to turn, and furthermore, an articulated excavator 4 is provided at the front of the cab 2. Although not shown, the inside of the cab 2 is of a type that forms a closed room separated from the outside world by closing windows and doors.

In addition to the above, in the present invention, the air purifying device 10 is fixed to the outside rear surface of the cab 2. The air purification device 10 includes a box-shaped casing 12 fixed to the back of the cab.
And a first filter 14 for introducing outside air, which is disposed in the casing 12, a second filter 16 including an ultra-high performance filter such as a HEPA filter, and the air supply fan 1.
8 and the fan 18 is provided with a D
It is driven by a C24V power supply.

In the figure, Q1 is an air supply air volume into the cab 2, Q2 is a ventilation air volume from the cab 2, and Q3 is an outside air intake air volume. By appropriately setting the air flow rates Q1, Q2, and Q3, the internal pressure of the cab 2 is maintained slightly higher than the external pressure, and the cab can always be maintained in a clean air atmosphere.

FIGS. 2 and 3 show a detailed structure of the air purifying device 10.
a, and is fixed to the back of the cab 2. Then, the entire side surface of the casing 12 is used as an outside air intake, and the outside air intake opening is covered with, for example, a punching metal 20. I have.

A vacant space 22 is formed between the first filter 14 and the second filter 16, and the vacant space 22 has a suction port 24 for circulating inside air which communicates with the back of the cab 2. Is open. Further, the second filter 16 and the fan 18 are separated from each other by a partition wall 26 at a predetermined interval, and an air intake port 18a of the fan 18 fixed to the partition wall 26 is opened to the partition wall 26. The air outlet 18b of the fan 18 is opened at the front of the casing 10 and communicates with the air supply port 28 which communicates with the back of the cab.

In the above, by driving the fan 18,
The outside air introduced into the casing 10 is purified through the first filter 14 and the second filter, and then supplied to the cab 2 through the air outlet 18 b of the fan 18 and the air supply port 28. On the other hand, the air in the cab is taken into the casing 10 through the air intake port 18a, and is circulated again into the cab 2 through the second filter 16 and the fan 18. Therefore, the outside air taken into the cab 2 is filtered through the first and second filters 12 and 14 to filter dust, and is supplied to the cab as clean air.

The outside air taken into the cab 2 through these openings as the doors and windows are opened and closed is filtered by the second filter 16 and then circulated again into the cab 2. Therefore, even if the inside of the cab 2 is temporarily filled with the contaminated air, the cab 2 becomes purified air after a lapse of time.

In the above embodiment, the case where the present invention is applied to a shovel car has been described. Applicable to general machinery. Further, the present invention can be applied not only to the inside of a tunnel but also to other construction machines generally used in a poor air environment.

[0016]

As is apparent from the above description, in the air purifying apparatus for the cab of a construction machine according to the present invention, it is not necessary to wear a dust mask even in a poor air environment such as a tunnel pit. And a comfortable working environment.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a shovel car provided with an air purification device of the present invention.

FIG. 2 is an explanatory sectional view showing the internal structure of the air purification device.

FIG. 3 is an explanatory cross-sectional view of a portion viewed from an arrow A in FIG. 2;

[Explanation of symbols]

 2 cab 10 air purification device 12 casing 14 first filter 16 second filter 18 fan 18a air intake 18b air outlet 22 vacant room 24 air intake 26 air supply

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masahiko Miura 2-15-2 Konan, Minato-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Kazuo Orikasa 2- 15-2 Konan, Minato-ku, Tokyo Stock (72) Inventor Satoshi Nishimura 5-16-7 Shiba, Minato-ku, Tokyo F-term in Ryugi Engineering Co., Ltd. F-term (reference) 2D015 EC01 4D058 JA12 JA14 KB11 KC01 QA21 SA20

Claims (2)

[Claims] 1. A casing which is arranged inside or outside a cab of a construction machine and has an outside air intake port and an air supply port which communicate with outside air and the cab, and which is arranged inside the casing and on the outside air intake side. A filter for removing dust, and an air supply fan disposed on the back of the filter, with an air intake port on the filter side and an air outlet disposed on the cab side air supply port. Air purification device in the cab of construction machinery. 2. The filter according to claim 1, wherein the filter comprises a first filter disposed at an outside air intake, and a second filter disposed at a predetermined distance from the first filter. The air purifier according to claim 1, wherein a suction port for air circulation communicating with the cab side is opened in the vacant room.