JP2002002536A - Working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a working vehicle in which a hood open/close structure can be disposed within a height dimension range satisfying the maximum height dimension based on a domestic law and the minimum height dimension in a cab based on an international standard specification and obtaining a good appearance design adapted for an outer shape of the cab. SOLUTION: An install space 18 of a cylinder 17 for opening/closing a hood 16 is provided in a space surrounded by a recessed part 19a formed on right and left side edges 19b of a roof body 14 of a cab 10 and right and left side walls of the hood 16 covering the recessed part 19a. The maximum height part of a roof 13 including a roof body and the hood 16 is set to a height not more than the maximum height dimension of vehicle based on a domestic law. The install space 18 of the cylinder 17 for opening/closing the hood 16 is set such that a height in the cab satisfies a height not less than the minimum height dimension based on an international standard specification. A freedom on a design including the install space in the cab is increased and a height of the hood other than the install space and a height of the roof body are approximately coincident with each other. Thereby, an extent of the cab can be made to the maximum state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work vehicle, and more particularly to a work vehicle having a cab with a skylight.

[0002]

2. Description of the Related Art Various types of work vehicles have been known in which a roof window for improving the upper visibility is provided on a cab roof body so as to be freely opened and closed. An example of a skylight opening / closing structure for opening / closing the skylight is disclosed in, for example, Japanese Patent No. 2966268. The canopy opening / closing structure of a cab for a hydraulic shovel disclosed in the publication includes a canopy for opening / closing the cab's skylight, and a canopy opening / closing cylinder for opening / closing the canopy in a vertical direction, wherein the canopy opening / closing cylinder has a roof. It is arranged between the board and the canopy.

In this cab for a hydraulic excavator, a roof plate constituting a ceiling portion and a side plate constituting an outer wall portion are integrally welded and joined at a joining portion. The upper end position of the joint is the maximum height position where rainwater or the like accumulates on the upper surface of the shingle. The opening of the skylight is surrounded by a protrusion formed of a rectangular frame projecting upward formed on the roof panel. The canopy that can cover the skylight has a flat plate shape having a larger area than the inside surrounded by the protrusion of the roof plate,
The four side walls of the canopy are formed by hanging portions that are vertically provided toward the roof plate. A rear end of the canopy is connected by hinges between support members on the shingle, and is attached so as to be rotatable vertically about the rear end.

When the canopy is closed by the canopy, a protruding portion constituting the rectangular frame of the canopy, a hanging part around the canopy, and a space surrounded by a part of a ceiling part of the canopy and a part of a roof plate are formed. Is done. A pair of canopy opening / closing cylinders for opening and closing the canopy are housed in the left and right spaces. The tip of the cylindrical portion of the canopy opening / closing cylinder is vertically rotatably connected via a bracket fixed to the front of the canopy, and the cylinder rod end is located near the rear of the roof plate. It is connected rotatably in the up-down direction via a fixed bracket. The cylinder is
When the canopy is closed, the lower part of the piston rod is disposed above the upper end position of the joint between the roof plate and the side plate.

[0005] Since the conventional canopy opening and closing structure has a hanging part on the side of the canopy, it is possible to prevent rainwater or the like from entering the inside of the canopy from the lateral direction. Since the canopy opening / closing cylinder can be arranged on the upper surface of the roof plate without providing a drain groove protruding toward the inside of the cab, the space of the cab can be widened. In addition, since the canopy opening / closing cylinder is located above the upper end of the joint, which is the maximum height where rainwater etc. accumulates on the roof plate, rainwater etc. It is said that contact with the piston rod of the cylinder can be prevented.

[0006]

In this type of working vehicle, the maximum dimension of the height from the ground contact surface to the highest point of the vehicle is determined based on the domestic law (example of vehicle restrictions) that regulates the transportation of vehicles. Limits are specified. On the other hand, the minimum size of the cab indoor space is defined based on the international standard (ISO 3411).

According to the skylight opening / closing structure disclosed in the above-mentioned Japanese Patent No. 2966268, the position of the rod lower surface of the canopy opening / closing cylinder arranged around the square frame is determined by the maximum amount of rainwater or the like that accumulates on the upper surface of the roof plate. In order to arrange at a position above the upper end position of the joint portion, which is the height position of the joint, it is necessary to set the side wall of the square frame to be higher than the diameter of the cylinder, and the roof canopy itself also has a roof plate. Have to protrude further from the upper surface of the. Therefore, the total height of the vehicle is the height of the vehicle, which is the sum of the height up to the top surface of the shingle and the height of the outer surface of the ceiling of the canopy.

As a result, in order to satisfy the respective height dimensions as described above, the height of the roof plate is reduced by the height of the protruding portion of the canopy, and the height of the protruding portion of the canopy is reduced. The interior space becomes narrower in combination with the height of the room.

[0009] In the above-mentioned conventional skylight opening / closing structure, the height of the vehicle changes depending on the presence or absence of the skylight. Therefore, in vehicles having the same height, the indoor space is divided into a case having a skylight and a case not having a skylight. It is necessary to separately consider the arrangement of the equipment to be equipped, the driving operability and the livability of the room, and the design of the cab and the room tends to be complicated.

Further, in the above-mentioned skylight opening / closing structure, as described above, the canopy itself is projected upward from the upper surface of the shingle. Therefore, the appearance and design of the cab are impaired by the height and shape of the protruding portion of the canopy. In some cases, care must be taken not to reduce the commercial value.

The present invention has been made to solve such a conventional problem, and has a specific object to provide a maximum height dimension of a vehicle based on national laws and a minimum height inside a cab based on international standards. To provide a work vehicle that enables the canopy opening / closing structure to be arranged within a height dimension range that satisfies both the dimensions and the dimensions, and that can also obtain a good external appearance design that matches the external shape of the cab. is there.

[0012]

The invention according to claim 1 is a canopy for opening and closing a skylight formed in a roof body of a cab, and a pair of left and right canopies arranged on right and left sides of the roof body. A work vehicle provided with an opening / closing cylinder, wherein the canopy opening / closing cylinder is installed in an installation space between the roof body and the canopy, and the maximum height of the roof including the roof body and the canopy is a domestic law. The height is set to be equal to or less than the maximum height dimension of the vehicle based on, the installation space of the cylinder,
The work vehicle is characterized in that the height inside the cab is set so as to satisfy not less than a minimum height dimension based on international standards based on the maximum height portion of the roof.

According to the present invention, the installation space of the canopy opening / closing cylinder is based on the maximum dimensional limit from the ground contact surface to the highest point of the vehicle based on the domestic law that regulates the transportation of the vehicle and the international standard. Since the difference between the height inside the cab and the minimum dimensional limit can be set as a reference, the degree of freedom of the design is increased. That is, the installation space for the canopy opening / closing cylinder can be formed in a desired shape and size within a height dimension range that satisfies both the maximum height dimension of the vehicle and the minimum height dimension in the cab. .

[0014] In this manner, the minimum height dimension in the cab is ensured, so that good driving operability and optimal livability can be obtained, and the maximum height dimension of the canopy can be maintained, thus ensuring safe transportation. For example, the height of the canopy and the height of the roof main body can be made substantially the same except for the installation space of the cylinder for opening and closing the canopy. Good appearance and design are obtained, and the commercial value is enhanced.

According to a second aspect of the present invention, the installation space for the canopy opening / closing cylinder is surrounded by a concave portion formed on left and right side edges of the roof body and left and right side wall portions of the canopy covering the concave portion. Stipulates that the space is

[0016] The height of the canopy is set within a range not exceeding the maximum height dimension allowed for this type of vehicle, and a concave portion is provided on the left and right side edges of the roof main body to provide a space for installing the canopy opening / closing cylinder. To form At this time, the height of the roof body is made to match the height of the canopy. In the cab, the height of the recess from the floor surface may be within an arc of a predetermined radius from the center of the waist when the operator is seated on the driver's seat, so that the height from the ceiling above the operator's head Can also be set low. According to the present invention, by utilizing the space in the lower range, the difference between the maximum allowable height of the canopy (roof body) and the minimum allowable height of the cabin of the cab is limited. What is necessary is just to form the said recessed part.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. 1 to 7 show a typical embodiment of the present invention. 1 is a perspective view schematically showing an example of the cab for a hydraulic shovel, FIG. 2 is a side view thereof, and FIG. 3 is a perspective view schematically showing a main part of a roof in the cab, FIG. 7 is II-I of FIG.
It is each sectional enlarged drawing of the I line, the III-III line, the IV-IV line, and the VV line.

Hereinafter, the front side of the cab is referred to as a front portion, the rear side is referred to as a rear portion, and the cab is referred to as up, down, left and right as viewed from the front.
In the present embodiment, a cab in a hydraulic shovel, which is a construction / civil vehicle, will be described as an example.However, the present invention is not limited to this, and for example, in various work vehicles for construction / civil work. Applicable to cab.

In these figures, reference numeral 10 denotes a cab of a hydraulic shovel. The cab 10 is a running body 11
a so as to be able to turn through a turntable 11b.
The cab 10 is displaced and disposed on the front right side of the swivel base 11b. An engine hood that covers an engine (not shown) is continuously provided on the rear surface of the cab 10. A work machine (not shown) such as a boom, an arm, and a bucket is installed near the inner side of the cab 10 at a substantially central portion of the swivel table 11b, and moves up and down around the swivel table 11b.
It is equipped to bend and rotate freely.

The cab 10 is bulged in an arc shape outwardly to the right of the swivel table 11b, and the left outer wall portion is formed in a substantially frusto-conical shape having a substantially vertical plane and a vertically-half-box shape. . The lower half of the rear wall of the cab 10 has a substantially concave portion with a smooth curved surface toward the room. A substantially arcuately curved door 12 having a window is slidably mounted in the front-rear direction on the right side wall portion of the cab 10 which protrudes in an arcuate shape. A front window and a rear window are arranged on the front and rear wall surfaces of the cab 10, respectively.
A side window is provided on the left side wall of the cab 10, and a side window is also provided on the right side wall.

The roof 13 of the cab 10 has an opening of a substantially square roof window 15 formed on a roof body 14. The roof window 15 has a canopy 16 for opening and closing the opening.
A skylight opening / closing structure having a pair of left / right canopy opening / closing cylinders 17 for opening and closing the canopy 16 is provided. An installation space 18 for the canopy opening / closing cylinder 17 is formed between the roof body 14 and the canopy 16.
The rear end of the canopy 16 is connected between the roof main body 14 by a pair of left and right hinges 24, 24. When the canopy opening / closing cylinder 17 is extended, as shown by a virtual line in FIG.
Is rotated upward, and the skylight 15 is opened. When the canopy opening / closing cylinder 17 in the extended state is contracted, the canopy 16 rotates downward and the skylight 15 closes.

The most characteristic feature of the present invention lies in the canopy mounting structure of a cab with a skylight. The canopy 16 sets the maximum height of the vehicle to a maximum height H1 or less according to the domestic law. At the same time, based on the height of the canopy 15, the installation space 18 of the cylinder 17 for opening and closing the canopy is adjusted so that the height inside the cab 10 is the minimum height H based on international standards.
The height is set to satisfy two or more heights.

Since the minimum height dimension H2 is ensured even at the minimum height of the ceiling in the cabin of the cab 10, good driving operability and optimal livability can be obtained. At the same time, the height (vehicle height) of the highest part of the roof body 14 and / or the canopy 16 is the maximum height dimension H1.
Therefore, safety during transportation of vehicles can be secured. Thus, in the present invention, the cab 10 can be designed so as to simultaneously satisfy the maximum height dimension H1 and the minimum height dimension H2 including the installation space 18 of the canopy opening / closing cylinder 17. , More design freedom,
For example, the height of the canopy 16 other than the installation space 18 of the canopy opening / closing cylinder 17 and the height of the roof main body 14 can be made substantially the same to maximize the size of the cab 10, and at the same time, it is possible to match the external shape. Appearance design and commercial value are enhanced.

Specifically, as shown in FIG. 3, the height H1 from the ground contact surface of the vehicle to the upper surface of the roof body 14 including the canopy 16 is set to a height equal to or less than the maximum height dimension based on the domestic law. ing. At the same time, the inner surface height H2 of the roof body 14 including the canopy 16 of the cab 10 is set in advance as a distance R from the center of the waist of the operator when sitting on the driver's seat to the lowest part of the ceiling. It is designed to fit within R. The distance R differs depending on the type of vehicle and is based on international standards.

In the present embodiment, the rear roof surface is disposed substantially horizontally, and the front roof surface including the canopy 16 is smoothly inclined downward from the front edge of the rear roof surface. The left and right side walls of the roof body 14 have a substantially rectangular cross-section in which the outer frame member 19 and the inner frame member 20 are integrally joined. As shown in FIG. 4, the opening of the skylight 15 has a substantially rectangular canopy receiving frame 14a to 14d formed on the front roof surface inclined forward.
Surrounded by

The upper end edges of the canopy receiving frames 14a to 14d are located on the plane of the roof body 14 around the opening, and of the canopy receiving frames 14a to 14d constituting the opening, the left and right and rear canopies are provided. The receiving frames 14a to 14c are the bottom pieces 14.
a 'to 14c' and the rising pieces 14a "to 14c" are connected to the roof body 14. On the other hand, the front canopy receiving frame 14d is connected to the front surface of the cab 10 through a rising piece 14d "with a smooth curved surface. Therefore, the roof body 14 is provided on the left, right and rear peripheral portions of the opening. A substantially U-shaped recess 19a is formed.

When the canopy 15 is closed, the lower surface of the canopy 16 is connected to the canopy receiving frame 14a via a rubber weather strip 23 fixed along the upper ends of the canopy receiving frames 14a to 14d. 14d.

The canopy 16 is made of a high-rigidity steel plate formed separately from the cab 10, and has a generally flat rectangular shape slightly narrower than the left and right side edges of the roof body 14. Consists of a lid. According to the present embodiment, the canopy 1
The left and right side wall portions 16a, 16a of the vehicle 6 bulge upward at portions corresponding to the concave portions 19a formed on the left and right peripheral portions of the opening within a range not exceeding the maximum height dimension H1 of the vehicle. The bulges 16b, 16b, which are elongated in the front-rear direction and open downward, have a substantially U-shaped cross section and extend in parallel with each other. The bulging portions 16b, 16b form an installation space 18 for installing the canopy opening / closing cylinder 17 between the left and right concave portions 19a of the roof body 14.

The shape and size of the installation space 18 are determined by the shape of the canopy opening / closing cylinder 17 and the diameter of the cylinder. Also, the configuration of the installation space 18 is such that the concave portion 19a of the roof main body 14 and the bulging portion 16b of the
Alternatively, for example, the ceiling surface of the canopy 16 may be made flat, and the roof body 14 may be constituted only by the concave portion 19a. In short, the roof 13 of the cab 10
Is within the range satisfying the maximum height dimension H1 of the vehicle, and the lower surface position of the installation space 18 of the canopy opening / closing cylinder 17 is within the range satisfying the minimum height dimension H2 of the cab 10. I just need.

The distal end of the cylindrical portion 17a of the canopy opening / closing cylinder 17 housed in the installation space 18 configured as described above is substantially L-shaped fixed inside the front portion of the bulging portion 16b of the canopy 16. It is connected via a bracket 22 having a shape so as to be rotatable in the vertical direction. In addition, the piston rod 17
b is rotatably connected via a substantially L-shaped bracket 23 fixed to the rear outside of the left and right concave portions 19a of the roof body 14. The lower surface portion of the piston rod 17b when the canopy 16 is closed is disposed above the bottom surface of the left and right concave portion 19a of the roof main body 14.

According to such a configuration, rainwater or the like flowing along the inclined surface of the roof body 14 does not stay at the installation position of the piston rod 17b of the canopy opening / closing cylinder 17 and the rainwater or the like flows from the front of the vehicle body to the outside. And flows smoothly. The piston rod 17b can be prevented from coming into contact with rainwater or the like.

Further, according to the present embodiment, the canopy 16
The rear end is rotatably mounted in a vertical direction via a pair of left and right hinges 24 fixed to a hinge mount 19b. The front end of the canopy 16 is attached to the roof body 1
A hook that is locked to a locking portion (not shown) formed on the front side of 4 is attached. An interior material (not shown) is attached to the lower surface of the canopy 16, and a handle (not shown) long in the front-rear direction is fixed to the lower surface of the interior material.

Now, the handle is pushed upward to release the engagement between the hook and the locking portion, and the canopy opening / closing cylinder 17 is extended. Then, the canopy 16 rotates upward via the hinge 24, and the skylight 15 opens. Next, when the handle is pulled downward, the canopy opening / closing cylinder 17 contracts, the canopy 16 pivots downward via the hinge 24 to close the skylight 15, and the canopy is closed. Locked with the locking part.

As described above, according to the present embodiment, the above-described maximum height dimension H1 and minimum height dimension H2 of the cab 10 are ensured, so that good driving operability and optimal livability can be obtained. And secure transportability. If the maximum height dimension H1 and the minimum height dimension H2 are secured, for example, the installation space 18 of the canopy opening / closing cylinder 17
Except for, the size of the cab 10 can be maximized,
Further, the design of the canopy 16 and the roof main body 14 is also increased in the degree of freedom, so that a good appearance design suitable for the external shape of the cab 10 is obtained, and the commercial value is enhanced.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing an example of a cab for a hydraulic shovel which is a typical embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a perspective view schematically showing a main part of a roof in the cab.

FIG. 4 is an enlarged sectional view taken along line II-II of FIG.

FIG. 5 is an enlarged sectional view taken along line III-III of FIG. 1;

FIG. 6 is an enlarged sectional view taken along line IV-IV of FIG. 1;

FIG. 7 is an enlarged sectional view taken along line VV of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Cab 10a Indoor space 11a Running body 11b Revolving base 12 Door 13 Roof 14 Roof main body 14a-14d Canopy receiving frame 14a'-14c 'Bottom piece 14a "-14d" Rising piece 15 Top window 16 Top lid 16a Side wall part 16b Swelling part 17 Canopy opening / closing cylinder 17a Cylinder cylinder part 17b Piston rod 18 Installation space 19, 20 First and second frame members 19a Depressed portion 19b Hinge mount 21 Weather strip 22, 23 Bracket 24 Hinge H1 Maximum height of vehicle H2 Inside cab Minimum height H3 Set height range R Distance from the waist center position of the seated operator to the lowest part of the ceiling

Claims (2)

[Claims] 1. A work vehicle comprising: a canopy for opening and closing a skylight formed in a roof body of a cab; and a pair of left and right canopy opening / closing cylinders disposed on left and right sides of the roof body. The opening / closing cylinder is installed in the installation space between the roof body and the canopy, and the maximum height of the roof including the roof body and the canopy is set to a height equal to or less than the maximum height dimension of the vehicle based on domestic law,
The installation space of the cylinder is set so that the height inside the cab satisfies the minimum height dimension based on international standards based on the maximum height portion of the roof. vehicle. 2. The installation space for the canopy opening / closing cylinder,
The work vehicle according to claim 1, wherein the work vehicle is a space surrounded by a recess formed in left and right side edges of the roof body and left and right side walls of the canopy that cover the recess.