JPH0687338A - Suction device for industrial vehicle - Google Patents

Abstract

PURPOSE:To provide a suction device for industrial vehicle capable of effectively reducing noise close to the ears with a simple structure. CONSTITUTION:In an industrial vehicle provided with a head guard 2 for protecting a driver's seat, a right roof frame 3a extending longitudinally in a roof part 3 and a right rear pillar 4a in a pillar part 4 are formed from mutually communicating hollow members. The front end part of the right roof frame 3 has an intake hole 5 for taking outside air, and the lower part side of the right rear pillar 4a has a delivery hole 7 for the intake air. Thus, the passage for intake air is extended, and the distance of the intake hole from the ears is extended, whereby the noise close to the ears can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial vehicle such as a forklift, and more particularly, to an intake system using a rear pillar of a head guard equipped to protect a driver's seat as an outside air introduction pipe of an engine.

[0002]

2. Description of the Related Art In recent forklifts, an outside air introduction system has been adopted as an engine intake device. This outside air introduction method is characterized in that clean air can be sucked in as compared with the inside air introduction method that sucks air in the engine room. In that case, generally, as shown in FIG. 3, a hollow material made of a hollow material is used for the head guard 31 from the viewpoint that clean air can be supplied by taking in from a portion with a high ground clearance, which is less affected by flying dust. An intake port 33 for taking in outside air is provided above the right rear pillar 32.
Is set and the rear pillar 32 is used as an outside air introduction pipe. As such an intake device, for example, Japanese Utility Model Publication No. 62-120025 and Japanese Utility Model Publication No.
2-117143 can be mentioned.

[0003]

By the way, in recent years, in forklift trucks, various noise reduction measures have been taken against the noise problem of the engine itself, the noise leakage problem from the engine room, etc., and the noise reduction is being achieved. . Along with this, the intake noise of the outside air introduction method, which has not been emphasized until now, that is, the intake noise generated at the intake port 33 of the rear pillar 32, has come to be a problem as the noise around the ears that affects the driver. Therefore, even in the outside air introduction type intake device disclosed in the above publication, various noise reduction measures are implemented such as forming a muffling chamber in the pillar, but it is difficult to obtain a sufficient reduction effect, However, there are problems such as being complicated and being too expensive.

In view of the above problems, it is a technical problem to be solved by the present invention to provide an intake device for an industrial vehicle improved so as to effectively reduce the noise around the ear with a simple structure. .

[0005]

In order to solve the above problems, the present invention is configured as follows. That is, an air intake device for an industrial vehicle having a head guard for protecting a driver's seat, which supports a right roof frame of left and right roof frames extending in the front and rear of the roof portion of the head guard and a roof portion. The right rear pillar of the front, rear, left and right pillars to be arranged is formed by a hollow member having a communication structure with each other, and an intake port for taking in outside air is provided at the front end of the right roof frame, while the lower part of the right rear pillar is provided. The side is characterized in that a delivery port for delivering the intake air to the air cleaner side is provided.

[0006]

In the intake device according to the present invention having the above structure,
In the head guard, the intake port for outside air intake is set farthest from the driver's ear, and the distance from the intake port for outside air intake to the outlet of intake air to the air cleaner is extended. As a result, the intake sound level is lowered, so that the noise around the ear is reduced compared to the conventional case where the intake port is set in the upper part of the rear pillar. Further, since it is not a structure in which a special muffling member or the like is additionally set in the pillar or the like for reducing the noise around the ear, there is no problem that the structure is complicated and the cost is increased.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a right rear perspective view of an air intake device using a head guard in a forklift, and FIG. 2 is a side view of the same. As shown in the figure, a head guard 2 for protecting the driver's seat 1 includes a roof portion 3 and a pillar portion 4 supporting the roof portion 3, and the left and right roof frames 3a extending in the front and rear of the roof portion 3 and the left and right rear pillars 4a. And are integrally molded. That is, the left and right roof frames 3a and the left and right rear pillars 4a are each formed of a hollow member having a rectangular cross section and have a structure in which they communicate with each other. The connecting portion between the roof frame 3a and the rear pillar 4a is curved to add design beauty.

The right roof frame 3a is formed with an intake port 5 for intake of outside air, and the intake port 5 is set to open to the front end face of the frame or the right side face of the frame. . On the other hand, at the lower part of the right rear pillar 4a, a delivery port 7 for delivering intake air to the air cleaner 6 is provided.
The inlet pipe 8 attached to the delivery port 7 is connected to the air cleaner 6 via a hose 9.

That is, in this embodiment, the right roof frame 3a and the right rear pillar 4a are integrally formed with a hollow member, and the outside air taken in through the intake port 5 set at the front end portion of the right roof frame 3a is taken into the right roof frame. 3a
Guide to the rear through the inside and right rear pillar 4a
It is configured such that it is guided downward through the inside and is delivered from the lower portion of the rear pillar 4a to the air cleaner 6 by a pipe, a hose or the like. In this case, the connection between the roof frame 3a and the rear pillar 4a is curved to prevent an increase in intake resistance.

In the intake device of the present embodiment constructed as described above, the distance from the intake port 5 for taking in the outside air to the intake port 7 for the intake air is extended as compared with the conventional one. Means that the intake negative pressure becomes high. And
When the intake negative pressure is increased, the engine load is slightly increased, but as a result, the intake sound level generated at the intake port 5 is reduced. In addition, the intake port 5 itself is located farthest from the driver's ear on the driver's seat 1 in the head guard 2, and compared to the conventional case where the intake port is set above the right rear pillar. Since it will be far away, after taking in the clean outside air at a high place where the influence of dust flying on the wheels is small,
The noise level around the ear reaching the driver is lowered.

Further, such an intake noise reduction system uses the constituent members of the existing head guard 2,
The noise reduction member is not additionally set in a new form, and therefore the structure is not complicated and the cost is not high.

In the present embodiment, the case where the room frame 3a and the rear pillar 4a are integrally formed has been described, but they may be separate bodies as long as their cylindrical holes are configured to communicate with each other. Absent.

[0013]

As described above in detail, in the present invention, the ear noise is reduced by the extension of the intake path and the isolation of the intake port from the ears, and a special structure for the existing head guard. The noise around the ear can be achieved with a simple structure without additional setting of members, and the invention is useful as an intake device for an industrial vehicle.

[Brief description of drawings]

FIG. 1 is a right rear perspective view of an intake device of an outside air introduction type according to an embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a side view showing a conventional example.

[Explanation of symbols]

 1 ... Driver's seat 2 ... Head guard 3 ... Roof part 3a ... Right roof frame 4 ... Pillar part 4a ... Right rear pillar 5 ... Intake port 6 ... Air cleaner 7 ... Outlet port

Claims (1)

[Claims] 1. An air intake system for an industrial vehicle, comprising a head guard for protecting a driver's seat, comprising: a right roof frame of left and right roof frames extending in a front and rear direction of a roof portion of the head guard; and a roof portion. The right rear pillar of the front, rear, left and right pillars arranged to support the is formed by a hollow member having a communication structure with each other, and at the front end of the right roof frame is provided an intake port for taking in outside air,
An intake device provided with a delivery port for delivering intake air to the air cleaner side on the lower side of the right rear pillar.