JPH09105150A - Operation cab of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute an unit where electrical and mechanical functional components are mounted on a side wall in an operation cab with a decorative cover and protect the decorative cover so as to prevent the generation of a clearance thereon and enable the decorative cover to be joined with the side area of the operation cab elastically. SOLUTION: Covers 30 to 34, which are provided on a wall surface 21, are formed with decorative covers which are made of a synthetic resin and molded curved in shape on the whole areas, thereby creating a beautiful and soft appearance as a whole. The upper parts of a wiper motor cover 30, an electric component cover 31 and a spare switch cover 32 are placed into contact with rubber 41 which mounts a window pane 22a on a side window but not on the side surface 21 on the lateral side. On this rubber 41, there are formed a groove into which the window pane 22a is inserted and a groove into which the wall surface 21 is inserted. Since the window pane 22a is so mounted that it may overhang outside, an inward-oriented projection is formed. The covers 30 to 32 are mounted so that a specified pushing force may act on this projection.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic excavator and other construction machines, in which the structure of the driver's cab, in particular, the attachment of a decorative cover having various functional parts mounted on the side wall portion below the side window of the driver's cab. It is about structure.

[0002]

2. Description of the Related Art As an example of a construction machine, for example, a hydraulic excavator has a structure shown in FIG. In the figure, 1 is a lower traveling structure, 2 is an upper revolving structure installed on the lower traveling structure 1 so as to be rotatable, and the upper revolving structure 2 has a cab 3
And the front working mechanism 4 is installed. The front working mechanism 4 connects an arm 4b to a tip of a boom 4a provided on the frame of the upper swing body 2 so as to be able to move up and down so as to be vertically rotatable, and a bucket as a front attachment is attached to the tip of the arm 4b. 4c are connected and provided.

The operator's cab 3 is in the shape of a box. The front part of the cab 3 has a front window on almost the entire surface, and the rear part has a window as wide as possible. A door is provided on one side of the left and right side portions, and by opening and closing this door, an operator can enter and exit the cab 3. On the side opposite to the side on which the door is provided (in the case of a hydraulic excavator, normally on the right side in the traveling direction), the upper side is a side window and the lower part is a wall surface. In addition, in the part where this wall surface is located, it is used as a space for arranging the outlet of the air conditioner, electrical parts such as switches and display panel, other electrical or mechanical functional parts and other equipment. It In general, for example, a housing is installed in the functional parts and accessories arranged on the side wall, and the functional parts and equipment are integrated into the housing to form a unit.

[0004]

By the way, various improvements and contrivances have been made regarding the structure of the cab of the construction machine. This kind of improvement is made when the operator performs various operations in the cab. Many have been designed to improve operability and drivability, but in recent years, the operability and drivability of the operator's cab are not only the viewpoint of operability and drivability, but also the habitability of the operator. Attention is being paid to the point that it also raises. Improving the habitability is to enrich the space where the operator lives, and for this purpose it is necessary to create as much space as possible in the cab and to make the internal structure excellent in design. is necessary.

As described above, inside the driver's cab, a unit provided with electrical and mechanical functional parts and accessories in the casing is arranged along the side wall, but this unit is designed. If it is made excellent and the size is made compact, the habitability in the cab is significantly improved. That is, if this unit is formed of a beautiful decorative cover made of one or more curved surfaces made of synthetic resin and the end of the decorative cover is attached so as to abut against the side wall, it is excellent in design. In addition, since a part of the wall surface of the unit can be shared with the side wall portion, it is possible to make the unit structure compact.

However, when the decorative cover is made of a synthetic resin, the decorative cover becomes quite large, and therefore, an error occurs during molding, and there is an error in assembly when it is attached to the side wall portion. Since functional parts, equipments, etc. may be attached to the case and warp or distortion may occur, it is very difficult to bring the entire end portion of the decorative cover into accurate contact with the side wall portion. Therefore, it is not possible to prevent a part of the decorative cover from separating from the side wall portion, and it is not possible to prevent a gap from occurring between them, and therefore, even if the decorative cover is used for elaborate design, it will not look good. Also,
If there is a temperature difference between the inside and outside of the operator's cab, the window glass will condense, forming water droplets that will flow down along the inner surface of the window glass. May get in. Since the decorative cover is provided with electrical and mechanical functional parts,
An electric circuit or the like is provided inside, and therefore, if the above-mentioned contaminants or the like enter, there is a possibility that the electric circuit or the like may be adversely affected. Further, since the side wall portion is formed of a steel plate and the decorative cover is formed of hard synthetic resin, when the vehicle body vibrates, the decorative cover repeatedly comes into contact with and separates from the side wall, and unpleasant noise such as rattling noise is generated.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a decorative cover for a unit mounted with electrical and mechanical functional parts arranged on a side wall in a cab. In order to prevent the gap from being formed, the decorative cover can be elastically brought into close contact with the side portion of the cab.

[0008]

In order to achieve the above-mentioned object, the present invention relates to mounting a window glass on a side window provided on a side portion of a driver's cab, in which the window glass and the side wall portion are separated from each other. A decorative cover, which is connected to each other with Z rubber, and on which electric parts and other functional parts are mounted, is attached to the side wall portion. The upper end of the decorative cover is connected to the upper end of the Z rubber to the inside of the Z cab. It is characterized in that it is configured to be fixed in a state of being pressed against the protrusion.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION In a side portion of a driver's cab, a side window is provided on an upper side, and a lower side is a side wall portion. A window glass is fitted into the side window, and the window glass is attached to the frame portion of the window via rubber. Here, the rubber for mounting the window glass needs to be engaged with the window frame and the window glass. As the shape of this rubber, the rubber having the structure shown in FIG.
There is one with the structure shown in. Rubber 10 shown in FIG.
Has a substantially H-shaped cross section and is called H rubber. The H rubber 10 has grooves 10a and 10b in which the frame 11 and the window glass 12 are inserted, which are formed vertically. On the other hand, the rubber 13 shown in FIG. 7 has a substantially Z-shaped cross section and is called Z rubber. The Z rubber 13 also has grooves 13a for inserting the frame 11 and the window glass 12, Although 13b is provided on the upper and lower sides, the grooves 13a and 13b are formed at positions shifted to the left and right. Then, generally, the frame 11 is placed inside and the window glass 12 is placed outside.

Comparing the H rubber 10 and the Z rubber 13 described above, the Z rubber 13 has a short height direction and the window glass 12 projects outward, so that the field of view can be widened and the window glass 12 can be attached and detached. It has been pointed out that there are advantages such as being easy. In the present invention, this Z rubber 1
Attention was paid to the points that are different from these advantages in 3. That is, comparing the H rubber 10 and the Z rubber 13, the H rubber 1
At 0, the width indicated by B ₁ in FIG. 6 does not need to be so large, but in the Z rubber 13, the groove 13b for inserting the frame 11 and the groove 13 for inserting the window glass 12 are formed.
To where the a are misaligned in the width direction, since the force in the direction indicated by an arrow is applied to FIG. 7, the dimension in the width direction B ₂
To keep it strong. Therefore, the Z rubber 13 has a shape that largely protrudes toward the inside of the cab.

Utilizing the inward projecting portion of the Z rubber, the end surface of the decorative cover is extended to this projecting portion, and the end surface of the decorative cover is mounted so as to be in pressure contact with the projecting portion. As a result, even if there is some error in the shape of the end surface portion of the decorative cover, the protruding portion of the Z rubber that is the elastic member is deformed, and the bending margin thereof is considerably larger than that of the H rubber. Since it is large, it is possible to prevent a gap from occurring between them. Of course, the end face of the decorative cover is located in addition to the part where the window glass is attached, but this part is not visible to the operator,
It is at each of the rear and lower positions, and water drops flowing down along the window glass do not enter this part. Therefore, even if these parts are open, it does not cause any particular problem.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings. Thus, FIG. 1 is a plan view of the right side portion of the cab 20, and FIG. 2 is a view seen from the direction of the arrow in FIG. Further, FIG. 3 shows a structure of the decorative cover, and FIG. 4 shows a cross section taken along line XX of FIG.

A wall surface 21 is formed on the lower side of the cab 20, and a side window 22 is formed at an upper portion of the wall 21. Reference numeral 23 is a front window. The driver's seat 24 is arranged so as to face the front window 23,
An operation lever 25 and a pedal 26 are arranged in a front portion of the driver's seat 24, and a console box 27 is arranged in a side portion (a console box on the right side is shown in the drawing, but a console similar to that on the left side is also shown. A box is arranged), and this console box 27 also has an operating lever 2
8 and other members, a liquid crystal panel and the like are arranged.

During actual work, the operator operates limited operating members such as operating levers and pedals.
In order to improve the function and safety of the hydraulic excavator as a construction machine, various sensors are provided on various members that make up the machine, and before or during the operation of the machine, and during operation, At the time of maintenance, it is possible to operate these various sensors to check whether or not the entire machine is in a sound operating state. For this purpose, various operation switches and display lamps are provided. In addition, ducts in air conditioners, car radios,
An ashtray, cigarette lighter, etc. are also installed, and a spare switch is also installed for the case where functional parts are optionally installed.

As described above, the electrical and mechanical functional parts and other accessories are unitized to form the side wall surface 2
1 is arranged. For this reason, a cover is used, and each of these parts, equipments, and the like are mounted on the cover, and the circuit board and the like are housed inside the cover.

Here, in the present invention, the cover is not only regarded as a functional side in which components and the like are simply mounted and the circuit board and the like are arranged inside, but is also excellent from a design point of view. Therefore, the comfort of the driver's cab 20 is enhanced. Further, the wall surface 21 on the side portion is also configured as a part of the cover, so that the cover is made compact, thereby providing a room for an operator's living space.

First, the cover is made of synthetic resin and is molded so as to have a curved surface as a whole, and is constituted by a decorative cover which can bring out beauty and softness as a whole. However, since various functional parts and accessories are mounted on this cover, the cover has an extremely complicated curved surface shape as a whole, and it is extremely difficult to form a molded product of one cover. . Therefore, the cover is formed by a plurality of members, and each is put in a joined state, or is joined in a state of being joined by using an adhesive or the like. How to form multiple covers and how to combine them depends on what functional parts, equipment, etc. are installed. You can form a makeup cover with an appropriate shape by
FIG. 3 shows one specific example of the structure of the cover.

In FIG. 3, 30 is a wiper motor cover, 31 is an electrical component cover, 32 is a spare switch cover, 33 is a foot duct cover, and 34 is a circuit component cover.

A wiper motor is installed inside the wiper motor cover 30.
Is for covering the wiper motor. The upper surface of the electrical component cover 31 has a substantially flat shape, and the electrical component 36 such as a switch, volume, or lamp is attached to the flat portion.
Is installed, and an air blowout portion 37 from which air from the air conditioner is blown out is provided. The degree of hugging from the air blowing portion 37 is routed to the air conditioner via the foot duct cover 33. The upper part of the spare switch cover 32 is also flat,
A spare switch 38 is provided on the flat portion, and accessories such as an ashtray 39 and a cigarette lighter 40 are also provided. A circuit board such as a microcomputer is mounted on the circuit component cover 34.

As described above, the five decorative covers 30-
2, the wiper motor cover 30, the electrical component cover 31, and the spare switch cover 32 are located inside the cab 20 by the operator. This is the part that comes into direct contact when entering. Moreover, when the window glass 22a is condensed due to the temperature difference between the inside and the outside, there is a high possibility that water drops will directly flow down and dust or the like will enter. On the other hand, in the other parts of the cover, the parts between the covers, and the like, even if there is a slight gap, it does not pose a serious problem in terms of appearance and protection of waterproof and dustproof inside.

As described above, even if the covers 30 to 34 are made up of the corner makeup covers and are excellent in appearance,
If there is a gap between the cover and the side portion of the operator's cab 20, it becomes unsightly, and it is not preferable from the viewpoint of waterproof and dustproof protection. Therefore, in order to attach the window glass 22a forming the side window 22 to the wall surface 21 in the side portion of the operator's cab 20, the rubber 41 attached around the window glass 22a is used,
By elastically bringing the cover into contact with the rubber 41, a gap is prevented from being formed therebetween. As described above, in order to prevent a gap from being formed in the cover, the structure of the joint portion of the spare switch cover 32 having the spare switch 38 attached to the wall surface 21 forming the side portion of the cab 20 will be described with reference to FIG. explain. Not only the spare switch cover 32, but also the corresponding portions of the wiper motor cover 30 and the electrical component cover 31 are similarly configured.

First, Z rubber is used as the rubber 41 for attaching the window glass 22a. In this Z rubber 41,
A groove 41a into which the window glass 22a is inserted and a groove 41b into which the wall surface 21 is inserted are formed. However, the groove 41a and the groove 41b are displaced left and right, and the window glass 22a is projected outward. Be attached to. In this Z rubber 41,
Therefore, the protrusion 41c toward the inside, that is, the inside of the cab 20 is formed. The spare switch cover 32 is attached to the wall surface 21 (actually, the wall surface 21 is composed of two steel plates 21a and 21b and the inner steel plate 21a) by a bolt 42. The end surface 32a at the upper portion of the switch cover 32 is pressed against the protruding portion 41c of the Z rubber 41.

Here, the protrusion 41c has a large bending margin. As is clear from FIG. 2, the end surface 32a of the spare switch cover 32 has a considerable length, and it is unavoidable that a dimensional error will occur to some extent during molding. Since a heavy member such as the spare switch 38 is attached, even if it is not possible to prevent a certain amount of bending or distortion from occurring, the end face 32a of the end switch 32a is protruded from the Z rubber 41.
By making pressure contact with the gap, there is no gap between them. Moreover, even if the end surface 32a is formed into the protrusion 41c.
Since the Z rubber 41 is an elastic member, there is no possibility that the auxiliary switch cover 32 will be deformed or damaged even if it is pressed against the.

As described above, by assembling the end surface 32a of the auxiliary switch cover 32 so as to be in complete contact with the Z rubber 41, the aesthetic appearance is not impaired, and a large temperature difference occurs inside and outside the cab 20. Therefore, even if dew condensation occurs on the window glass 22a of the side window 22 and flows down as water droplets, there is no possibility of entering the inside of the auxiliary switch cover 32. Further, since the spare switch cover 32 made of hard synthetic resin is elastically abutted against the Z rubber 41, even if the cab 20 vibrates during traveling or working, the end surface of the spare switch cover 32 is There is no possibility that noise such as rattling noise will be generated when 32a vibrates and comes into contact with and separates from the Z rubber 41.

[0025]

As described above, according to the present invention, the cover is formed of a synthetic resin decorative cover having an excellent aesthetic appearance, and a protruding portion having a large bending allowance is provided for mounting the window glass in the side window. By using the Z rubber provided with, and attaching the upper end surface of the decorative cover so as to press-contact with the protruding portion of the Z rubber, no gap is formed between them and the appearance is more excellent. In addition, it is possible to reliably prevent water droplets or the like flowing down from the window glass of the side window from entering the interior of the decorative cover, and it is also possible to prevent generation of noise due to vibration.

[Brief description of the drawings]

FIG. 1 is a plan view showing an internal structure of a cab of a construction machine showing an embodiment of the present invention.

FIG. 2 is a view seen from the direction of the arrow in FIG.

FIG. 3 is an external view showing a plurality of covers provided on a side portion of a driver's cab in a state where they are separated from each other.

FIG. 4 is a sectional view taken along line XX of FIG. 2;

FIG. 5 is an external view of a hydraulic shovel as an example of a construction machine.

FIG. 6 is a cross-sectional view of H rubber used for attaching a window glass.

FIG. 7 is a cross-sectional view of Z rubber, which is another form of rubber used for attaching a window glass.

[Explanation of symbols]

 20 Driver's Cab 21 Wall Surface 22 Side Window 22a Window Glass 30 Wiper Motor Cover 31 Electrical Equipment Cover 32 Spare Switch Cover 32a End Face 34 Foot Duct Cover 35 Circuit Component Cover 41 Z Rubber 41a, 41b Groove 41c Projection

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadahisa Tomita 650 Jinrachicho, Tsuchiura City, Ibaraki Prefecture Hitachi Construction Machinery Co., Ltd. Tsuchiura Factory

Claims (1)

[Claims] 1. A driver's seat is installed on the floor, and substantially the entire front part of the driver's seat is a front window, a door is provided on one side or a rear part, and the other side is In a construction machine having a side wall portion on the lower side and a driver's cab having a side window above the side wall portion, when mounting a window glass on the side window, a space between the window glass and the side wall portion is Z. A decorative cover, which is connected with rubber and on which electric parts and other functional parts are mounted, is mounted on the side wall, and the upper end of the decorative cover is fixed in a state of being pressed against the protrusion of the Z rubber toward the inside of the driver's cab. A cab of a construction machine characterized by being configured as described above.