JP2007203856A - Cab - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a view when driving by preventing adhesion of foreign matter such as quick drying sprayed concrete difficult to wipe away with wipers and washer liquid to a glass surface of a window of a cab. <P>SOLUTION: The cab is provided with a band-like transparent film having a width enough to cover the outer surface of the glass window, a housing part provide in one end side of the glass window to house the rolled film, and a winding part provided on the other end side of the glass window to draw the film inside the housing part by a predetermined length and to wind up into a roll. The film is stretched along the outer surface of the glass window between the housing part and the winding part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a cab for improving visibility, such as a construction machine, in which the visibility is deteriorated by dirt that is difficult to remove and adheres to the glass surface of a glass window.

For example, a front window which is a glass window of a cab provided in a construction machine such as a hydraulic excavator is provided with a wiper which is a device for wiping raindrops on a glass surface (for example, see Patent Document 1). On the other hand, dirt such as muddy water and dust is likely to adhere to the glass surface of a cab of a machine that operates on a site with a lot of dust such as a construction machine even when it is not rainy. The adhering dirt is wiped off by operating a wiper and spraying a washer liquid as necessary. Dirt that cannot be wiped with the wiper is manually removed by the operator.
JP-A-8-268238 (FIG. 1)

The conventional cab in the form as described above has the following problems to be solved in relation to the dirt adhering to the glass surface.

For example, in a site such as tunnel excavation work, in addition to muddy water, dust and the like, foreign matters such as quick-drying spray cement are scattered and adhere to the glass surface of the cab. In particular, foreign matter such as quick-drying cement is difficult to wipe off once it adheres to the glass surface by wiper, washer liquid, hand-wiping and cleaning. In order to remove the dirt and secure the driving field of view, it may be necessary to replace the window glass.

The present invention has been made in view of the above facts, and its technical problem is to prevent foreign matter that is difficult to wipe off with a wiper, washer liquid, etc. on the glass surface of the cab window, and to reduce the driving field of view. It is to provide a cab that can be improved.

According to the present invention, as a cab for solving the above technical problem, a transparent film having a width covering the outer surface of the glass window of the cab, and one end side of the glass window accommodating the film wound in a roll shape. And a winding unit installed on the other end of the glass window that draws out the film of the storage unit to a predetermined length and winds it into a roll, and the film is formed of the storage unit and the winding unit. A cab is provided which is stretched along the outer surface of the glass window therebetween.

Preferably, the winding unit includes a winding drive unit that can be turned on and off, and the storage unit includes a biasing unit that elastically biases the film in a direction opposite to the drawing direction. The glass window is a front window formed on the front surface of the cab, and the housing portion is installed on the lower end side of the front window, and the winding unit is installed on the upper end side. The cab includes a skylight formed on the ceiling adjacent to the front window, the winding portion is installed at the end of the skylight, and the film is stretched along the front window and the skylight.

The winding drive means includes a timer that automatically winds the film when a certain time has elapsed. The film is made of vinyl chloride resin.

The cab constructed in accordance with the present invention has a strip-shaped transparent film covering the outer surface of the glass window of the cab, a container on one end side of the glass window that accommodates the roll-wrapped film, and a film in the container. The film is stretched along the outer surface of the glass window between the housing part and the winding part.

Therefore, by spreading a transparent film along the outer surface of the glass window, foreign matter that is difficult to wipe off with a wiper, washer liquid, or hand-wiping on the glass surface, such as a quick-drying spray cement, can be obtained. When the film is prevented from adhering and the visual field is obstructed by the foreign matter adhered to the film, the dirty part can be taken up and a new part is drawn out so that the driving visual field is not obstructed.

Hereinafter, a cab configured according to the present invention will be described in more detail with reference to the accompanying drawings illustrating a preferred embodiment of a cab provided in a hydraulic excavator which is one of representative examples of construction machines.

A description will be given with reference to FIG. The cab indicated by the whole number 2 is formed in a substantially rectangular parallelepiped shape, and includes a front window 4 that is a glass window on substantially the entire front surface (left front side in FIG. 1), and is used for getting on and off the left side surface (right front side in FIG. 1). And a skylight 8 formed of a resin substantially the same as a glass window on the front window 4 side of the ceiling.

A wiper 10 for wiping the glass surface of the front window 4 is provided on one side of the left and right outer edges of the front window 4 (right side as viewed from inside the cab).

The cab 2 includes a strip-shaped transparent film 12 having a width W that covers the outer surface of the front window 4, and an accommodating portion 14 that is installed at one end and the lower end side of the front window 4 that accommodates the film 12 wound in a roll shape. The film 12 of the accommodating portion 14 is drawn out to a predetermined length and wound into a roll shape, and includes a winding portion 16 installed at the end of the skylight 8 beyond the other end of the front window 4 and the skylight 8 on the upper end side. .

Between the front window 4 and the skylight 8 on the outer surface of the cab 4, a guide plate 18 that guides the film 12 between the accommodating portion 14 and the winding portion 16 is provided.

The accommodating part 14 is formed in a container shape having a substantially trapezoidal cross section, and is provided with a slit 14a for drawing out the film 12 having a width W on one surface of the front window 4 side. Similarly, the winding unit 16 is formed in a container shape having a substantially trapezoidal cross section, and includes a slit 16a for winding the film 12 having a width W on one surface of the skylight 8 side. The accommodating portion 14 and the winding portion 16 will be described in detail later.

The guide plate 18 is formed of a plate material, has a mountain-shaped cross section substantially along the outer surface between the front surface and the ceiling portion of the cab 4, and has a length protruding on both sides of the width W of the film 12.

Thus, the film 12 is drawn out from the storage portion 14 by the winding portion 16 in the direction indicated by the arrow X, and stretched along the outer surfaces of the front window 4 and the skylight 8 between the storage portion 14 and the winding portion 16. Is done.

The film 12 is formed of a vinyl chloride resin. The width W of the film 12 has a size that substantially covers the front window 4.

2 will be described with reference to FIG. The accommodating portion 14 includes urging means 14b that can elastically urge the film 12 in the direction opposite to the drawing direction indicated by the arrow X, for example, can be formed by a plate spring. In the accommodating portion 14, the film 12 having a length that allows the film 12 without dirt to be drawn out a plurality of times is wound and accommodated in place of the film 12 that has been drawn and stretched and adhered with foreign matter.

The winding unit 16 includes winding drive means 16b formed by an electric motor that can be turned on and off by a switch 20 installed in the cab 2. A timer 22 is provided between the winding drive means 16 b and the switch 20 connected to the power source 21.

The timer 22 automatically energizes the switch 20 and the winding drive means 16b when the set time has elapsed in the switch 20 ON state, operates the winding drive means 16b, and has a length of stretched. Minute film 12 is automatically wound. If the timer 22 is set to a state in which no time is set, the winding drive means 16b operates only when the switch 20 is turned on.

In the cab 2, depending on the state of dirt on the stretched transparent film 12, for example, when there is a lot of dirt and the driving field of view deteriorates, the switch 20 is turned on to take up the dirty part and take up a new part without dirt. Draw out. Alternatively, when it is desirable to automatically update the film 12 at predetermined time intervals, the timer 22 sets the time and the switch 20 is turned on.

The effect of the cab 2 as described above will be described.

The cab 2 includes a strip-shaped film 12 having a width W that covers the outer surface of the front window 4 that is a glass window, and a storage portion 14 that is installed on one end side of the front window 4 that stores the film 12 wound in a roll shape. The film 12 of the accommodating portion 14 is provided with a winding portion 16 installed on the other end side of the front window 4 which is drawn out to a predetermined length and wound in a roll shape, in the embodiment, on the end side of the skylight 8, and the film 12 is Between the accommodating part 14 and the winding part 16, it is stretched along the outer surface of a glass window.

Therefore, the film 12 is stretched along the front window 4 and the skylight 8 which are glass windows, so that a foreign substance that is difficult to wipe off with a wiper, a washer liquid, or a hand wipe is not adhered to the glass surface. In the case where the visual field is obstructed by the foreign matter adhered, the driving visual field can be prevented from being obstructed by winding the dirty part and pulling out the new part.

The winding unit 16 includes a winding drive unit 16b that can be turned on and off, and the storage unit 14 includes a biasing unit 14b that elastically biases the film 12 in a direction opposite to the drawing direction X. Accordingly, the film 12 can be wound up by the driving means, and the film 12 can be stretched to the tensioned state by the biasing means.

The glass window is the front window 4 formed on the front surface of the cab 2, and the accommodating portion 14 is installed on the lower end side of the front window 4 and the winding portion 16 is installed on the upper end side. The field of view from the cab 2, particularly the left and right fields of view, are not obstructed by the taking part 16.

In the cab 2 having the skylight 8 on the ceiling adjacent to the front window 4, the winding portion 16 is installed at the end of the skylight 8 and the film 12 is stretched along the front window 4 and the skylight 8. The field of view of the skylight 8 together with the front window 4 can be secured sufficiently satisfactorily.

Since the winding drive means 16b includes a timer 22 that automatically winds up after a certain period of time, a cab of a construction machine that repeats the same work for a long time at the same work place, for example, a hydraulic pressure operated at a tunnel excavation site In an excavator cab or the like, the winding interval of the film 12 is set by the timer 22, so that the operator can concentrate on work in the cab where visibility is ensured without paying attention to the winding of the film 12. .

The film 12 is formed of a vinyl chloride resin. Therefore, it can be easily obtained at a relatively low cost.

The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications or corrections can be made within the scope of the present invention, for example, as described below. Is.

In the embodiment of the present invention, the winding unit 16 includes the winding driving means 16b. However, when the winding frequency is low, a manual winding type by a manual handle or the like may be used.

In the embodiment of the present invention, the accommodating portion 14 is installed on the lower end side of the window, and the winding portion 16 is installed on the upper end side. However, depending on the form of the cab, the construction machine equipped with the cab, etc. You may install in the right and left side.

In the embodiment of the present invention, the cab 2 includes two windows, a front window 4 and a skylight 8, and the film 12 is stretched along the front window 4 and the skylight 8, but for example, only along the front window 4. You may stretch out.

In the embodiment of the present invention, the film 12 is made of a vinyl chloride resin. However, depending on the type of foreign matter attached, for example, when higher strength is required, the film 12 is made of a polycarbonate resin or a polyester resin. Use it.

The perspective view which looked at the cab comprised according to this invention from the diagonally left front a little upwards. The structure explanatory drawing of parts, such as a film, an accommodating part, and a winding part, of the cab of FIG.

Explanation of symbols

2: Cab 4: Front window (glass window)
8: Skylight 12: Film 14: Storage part 14b: Energizing means 16: Winding part 16b: Winding drive means 22: Timer

Claims (6)

A band-like transparent film having a width covering the outer surface of the glass window of the cab;
An accommodating portion installed on one end side of a glass window for accommodating this film wound in a roll;
A winding part installed on the other end side of the glass window that draws out the film of the accommodating part for a predetermined length and winds it into a roll,
A film is stretched along the outer surface of the glass window between the housing part and the winding part,
A cab characterized by that. The winding unit includes winding drive means that can be turned on and off,
The accommodating portion includes an urging means that elastically urges the film in a direction opposite to the drawing direction.
The cab according to claim 1. The glass window is the front window formed on the front of the cab,
The accommodating part is installed on the lower end side of the front window, and the winding part is installed on the upper end side.
The cab according to claim 1 or 2, characterized by the above. The cab has a skylight formed in the ceiling adjacent to the front window,
The winding part is installed at the end of the skylight,
The film is stretched along the front and skylights,
The cab according to claim 3. The winding drive means is equipped with a timer that automatically winds up the film after a certain period of time.
The cab according to claim 2 characterized by things. The film is made of vinyl chloride resin,
The cab according to any one of claims 1 to 5.

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