JP2004034783A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To widen and improve a frontward visual field during working, by preventing the interference of a front window with the chamfered section of a cab, even in the case of a wider front window width. <P>SOLUTION: A cutout part 25 is arranged at a position corresponding to the chamfered section 19 of the cab 11, when an upper side front window 21 is stored on a top surface part 16 side or at the upper left part of the upper side front window 21. When the upper side front window 21 is stored on the top surface part 16 side, the cutout part 25 avoids interference of the front window 21 with the chamfered section 19 of the cab 11, thereby the upper side front window 21 having a wider width can be formed to provide a wider frontward visual field. The front part 12 is provided with a blocking surface part 12B for blocking the position corresponding to the cutout part 25, when the upper side front window 21 is blocked. This enables the blocking surface part 12B to prevent the intrusion of rain water into the cab 11 and the the outflow of the air-conditioning air or the like. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a construction machine such as a hydraulic shovel, and more particularly to a construction machine having a cab on which an operator rides.
[0002]
[Prior art]
Generally, a hydraulic excavator as a construction machine is provided with a lower traveling body capable of self-propelling, an upper revolving body rotatably mounted on the lower traveling body, and a left front side on the upper revolving body. A cab having a driver seat on which an operator sits. At the front of the upper revolving superstructure, a working device for excavating soil and the like is provided so as to be able to move up and down.
[0003]
In addition, there is a small-sized hydraulic excavator called a mini-excavator, and by using the small-sized hydraulic excavator, excavation work or the like can be performed even in a narrow work site. In addition, a small-sized hydraulic excavator is an ultra-small hydraulic excavator capable of safely performing a turning operation even in a narrow place. This type of hydraulic excavator is disclosed in, for example, JP-A-8-284207. (Hereinafter referred to as the prior art).
[0004]
And the small ultra-small turning type hydraulic excavator according to the prior art is formed so that at least the rear end side of the upper turning body is within the vehicle width of the lower traveling body, and the upper turning body has a turning center when viewed from above. It is formed in a substantially circular shape with the center as the center.
[0005]
The cab has a box shape with a frame-shaped front part, a rear part, a left side part, a right side part and a top part, and the cab is provided with a front window slidable between the front part and the top part. ing.
[0006]
Here, the cab requires a space for arranging a driver's seat, operation levers and switches, and a space for operating these, so that the cab needs to have a somewhat large width dimension. However, in a small ultra-small turning hydraulic excavator, if the width of the cab is increased, the rear left position on the outside protrudes from the turning radius of the upper turning body.
[0007]
For this reason, the cab according to the prior art is provided with a chamfered portion at the left rear position so that the left rear position is within the turning radius of the upper turning body.
[0008]
[Problems to be solved by the invention]
By the way, in the above-mentioned conventional hydraulic shovel, since the chamfered portion is provided at the rear position on the left side of the cab, the front window stored on the top surface side when the window is opened is attached to the chamfered portion of the cab at the time of storage. The width dimension must be made small so as not to interfere.
[0009]
Therefore, a front window having a small width cannot provide a wide front view to the operator, and thus has a problem that workability is reduced.
[0010]
The present invention has been made in view of the above-described problems of the related art, and an object of the present invention is to prevent the front window from interfering with the chamfered portion of the cab even when the width of the front window is increased. It is an object of the present invention to provide a construction machine capable of widening the visibility at the time.
[0011]
[Means for Solving the Problems]
A construction machine according to a first aspect of the present invention includes a vehicle body, a revolving body that is rotatably mounted on the vehicle body and has a shape in which at least a rear end side fits within the vehicle width of the vehicle body, and a revolving body provided on the revolving body. And a box-shaped cab having a driver's seat.
[0012]
In order to solve the above-described problem, a feature of the configuration adopted by the invention of claim 1 is that the cab is provided with a chamfered portion at the rear position so that the outer rear position is within the turning radius of the revolving structure. The cab is provided with a front window slidably arranged between a front surface portion and a top surface portion, and the front window is opened when the front window is opened and stored on the top surface side, and a chamfered portion of the cab is provided. A notch is provided in a corresponding portion, and a closing surface portion for closing a portion corresponding to the notch when the front window is closed is provided in a front portion of the cab.
[0013]
With this configuration, when the front window having a large width is stored on the top surface side of the cab, the front window can be prevented from interfering with the chamfered portion by the notch. Thus, a front window having a large width can be provided in the front portion of the cab.
[0014]
Further, when the front window provided with the notch is closed and the front window is disposed on the front side, the closing surface provided on the front portion closes a portion corresponding to the notch of the front window. Thereby, the front part can be closed tightly.
[0015]
According to the invention of claim 2, the cab is provided with a door which can be opened and closed at a front portion of a side portion located outside, and a chamfered portion is provided at a position behind the door.
[0016]
With this configuration, the outer side surface of the cab can be located at a position rearward of the door within the turning radius of the revolving superstructure by the chamfer.
[0017]
According to the third aspect of the invention, the cab has a configuration in which the width dimension of the front surface is formed larger than the width dimension of the rear surface.
[0018]
With this configuration, the width of the front window can be increased in accordance with the front portion, and the front view can be widened. Further, the rear side of the cab can be kept within the turning radius of the upper turning body by reducing the width dimension of the rear surface portion.
[0019]
According to the fourth aspect of the invention, the cab is formed such that a portion closer to the front side of the left side portion located on the outside is a parallel surface portion substantially parallel to the right side portion located on the inside, and a rear portion from the parallel surface portion on the left side portion is a chamfered portion. I did it.
[0020]
With this configuration, the width between the parallel surface portion on the left side surface portion and the right side surface portion can be increased, and a wide space can be secured in the cab. On the other hand, the rear part from the parallel plane part can be set within the turning radius by the chamfer part.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, as a construction machine according to an embodiment of the present invention, a small ultra-small turning hydraulic excavator will be described as an example, and the construction machine will be described in detail with reference to FIGS. In the present embodiment, the front, rear, left, and right directions are described as the front, rear, left, and right directions as viewed from the operator who gets on the cab.
[0022]
Reference numeral 1 denotes a small ultra-small turning type hydraulic shovel applied to the present embodiment. The hydraulic shovel 1 is provided with a self-propelled lower traveling body 2 which forms a vehicle body and is capable of turning on the lower traveling body 2. The upper revolving structure 3 is provided, and a cab 11 described later provided on the upper revolving structure 3 is roughly constituted. A working device 4 for excavating earth and sand is provided at the front of the upper swing body 3 so as to be able to swing left and right and to be able to elevate.
[0023]
The upper revolving unit 3 has a revolving frame 5, and a cab is mounted on the revolving frame 5 so as to cover an engine (not shown) and the like mounted on the rear side as shown in FIGS. An outer cover 6 is provided from the right side to the rear side of 11, and an arc-shaped counterweight 7 is attached to the rear end of the revolving frame 5.
[0024]
Here, as shown in FIG. 2, the upper swing body 3 swings around a swing center O. The overall shape of the upper revolving unit 3 is formed in a substantially circular shape centered on a turning center O substantially within a turning radius R based on the counterweight 7 within the vehicle width of the lower traveling unit 2.
[0025]
Reference numeral 11 denotes a cab mounted on the front left side of the revolving frame 5. The cab 11 defines a driver's cab in which an operator gets in, and has a driver's seat and various levers (both not shown) inside. And so on.
[0026]
As shown in FIGS. 2 to 4, the cab 11 includes a front surface portion 12 disposed on the front side, a rear surface portion 13 disposed on the rear side so as to face the front surface portion 12, and the upper slewing body 3. A left side part 14 is provided between the front part 12 and the rear part 13 located on the outside left side, and is provided between the front part 12 and the rear part 13 located on the right side inside. The right side surface portion 15, the top surface portion 16 provided with the upper side closed, and a chamfered portion 19 described later form a substantially pentagonal box shape when viewed from above.
[0027]
Here, as shown in FIG. 3, the front part 12 is formed in a frame shape by a window frame opening 12A that opens in a substantially square shape toward the front side. By forming it wide with W1, the front part 12 is formed with a sufficiently wide width.
[0028]
In addition, a closed surface portion 12B is formed on the front surface portion 12 at an upper left portion of the window frame opening 12A. The closed surface portion 12B is formed into a triangle (for example, a right-angled isosceles triangle) having the corner between the left side surface portion 14 and the top surface portion 16 as a vertex. Thereby, when the upper front window 21 is arranged at the closing position, the closing surface portion 12A covers the upper left portion corresponding to the cutout portion 25, and closes the upper front window 21 with respect to the front portion 12 of the cab 11. It is to let.
[0029]
The left side surface portion 14 of the cab 11 has a parallel surface portion 14A substantially parallel to the right side surface portion 15A from the rear side to the front side of the middle portion in the front and rear directions of the cab 11, and the rear side portion from the parallel surface portion 14A. Is a chamfered portion 19 described later. The left side surface portion 14 is provided with a center pillar 14B located at an intermediate portion between the front and rear directions, and is provided with a getting-on / off opening 14C located on the front side from the center pillar 14B. Is provided with a door 17 described later.
[0030]
Here, reference numeral 17 denotes a door provided on the left side surface portion 14 of the cab 11 (illustrated in FIG. 1), and the door 17 opens and closes the entry / exit opening 14C of the left side surface portion 14. Further, the door 17 is attached to a center pillar 14B of the left side surface portion 14 via hinges 17A, 17A so as to be rotatable forward and backward. The door 17 is formed so as to be able to close the entry / exit opening 14C by being pivoted forward about the hinge 17A, and to be substantially within the turning radius R even when pivoted rearward. ing.
[0031]
Further, reference numerals 18 and 18 denote left and right guide rails extending from the front side of the left side surface portion 14 and the right side surface portion 15 of the cab 11 to the upper side, respectively. 24 moves, and guides the upper front window 21 to a window closing position shown in FIG. 3 and a window opening position shown in FIG.
[0032]
Reference numeral 19 denotes a chamfered portion provided at a rearward position on the left side of the cab 11, and the chamfered portion 19 is, as shown in FIGS. The rear part from the parallel plane part 14A is formed as a vertically long inclined plane by being inclined so as to be narrowed inward (right side). Thereby, the chamfered portion 19 can fit the rear position on the left side of the cab 11 within the turning radius R of the upper turning body 3.
[0033]
As shown in FIG. 3, the cab 11 configured as described above has a front portion 12 having a wide width W1. Thereby, the window frame opening 12A formed in the front part 12 can also be formed to have a wide width, so that the front field of view can be widened.
[0034]
On the other hand, the rear surface portion 13 of the cab 11 is formed to have a narrow width with a width dimension W2 smaller than the width dimension W1 of the front surface portion 12 because the rear portion of the left side surface portion 14 is narrowed down by the chamfered portion 19. (W1> W2).
[0035]
Next, reference numeral 20 denotes a lower front window glass provided on the lower side of the front portion 12 of the cab 11, and the lower front window glass 20 is a lower portion of a window frame opening 12A formed in the front portion 12. Mounted on. Further, the lower front window glass 20 can be removed when the window frame opening 12A is fully opened.
[0036]
Reference numeral 21 denotes an upper front window provided near the upper side of the front portion 12 of the cab 11, and the upper front window 21 includes a glass frame 22, a window glass 23, a roller 24, and a notch 25, as shown in FIG. It is roughly constituted by.
[0037]
Reference numeral 22 denotes a glass frame which is formed as a substantially rectangular frame elongated in the upward and downward directions. The glass frame 22 includes an upper frame 22A, a lower frame 22B, a left frame 22C, a right frame 22D, and an upper frame 22D. It is formed by an inclined frame portion 22E between the frame portion 22A and the left frame portion 22B. Further, the glass frame 22 is fitted and attached to a peripheral portion of the window glass 23, and forms a mounting base of the roller 24 with respect to the window glass 23.
[0038]
Reference numeral 23 denotes a window glass provided in the glass frame 22. The window glass 23 has a substantially rectangular shape that is long in an upward and downward direction, and is formed of a gently curved plate glass. Further, the upper left corner of the window glass 23 is cut obliquely in correspondence with the inclined frame portion 22E of the glass frame 22 to form an inclined edge portion 23A. Here, the window glass 23 is formed with a slightly larger width than the window frame opening 12A of the front portion 13, and can provide a wide front view to the operator in the cab 11.
[0039]
Reference numerals 24, 24,... Are a total of four rollers provided on the back side of the window glass 23, two on each of the left and right sides. Each roller 24 has a bracket (not shown) mounted on the glass frame 22. It is rotatably mounted via Each roller 24 moves along the guide rail 18 and, together with the guide rail 18, constitutes a guide mechanism for guiding the upper front window 21 between the window closing position and the window opening position.
[0040]
A notch 25 is formed in the upper left portion of the upper front window 21. The notch 25 is a chamfered portion of the cab 11 when the upper front window 21 is stored on the top surface 16 side of the cab 11 (opening position). 19, that is, an inclined frame portion 22E of the glass frame 22 located at the upper left of the upper front window 21 and an inclined edge portion 23A of the window glass 23. The cutout portion 25 is formed with substantially the same inclination angle as the bottom of the closed surface portion 12B of the front portion 12 having a triangular shape.
[0041]
Thus, when the upper front window 21 is stored on the top surface 16 side of the cab 11, the notch 25 interferes with the glass frame 22 and the window glass 23 of the upper front window 21 with the chamfered portion 19 of the cab 11. Therefore, the upper front window 21 (window glass 23) can be formed with a large width.
[0042]
The upper front window 21 configured as described above has a window closing position (position shown in FIG. 3) arranged on the front surface 12 side of the cab 11 and a window opening position (shown in FIG. 4) arranged on the top surface 16 side. Position) and can be moved to. That is, in the closed position, the upper front window 21 is located on the back surface side of the front part 12 and cooperates with the lower front window glass 20 to close the window frame opening 12A.
[0043]
On the other hand, the upper front window 21 can open the window frame opening 12A by moving the roller 24 along the guide rail 18 and sliding in the order of upper side and rear side. In this window position, the upper front window 21 can be stored in a substantially horizontal state so as to extend forward and backward below the top surface 16 of the cab 11.
[0044]
The hydraulic shovel 1 according to the present embodiment has the above-described configuration, and its operation will be described next.
[0045]
First, at a work site or the like, the operator operates the traveling operation lever in the cab 11 to tilt the lower traveling body 2 forward and backward, for example. When excavation work of earth and sand is performed, the work operation lever is tilted to operate the work device 4 or the upper swing body 3 is turned.
[0046]
Then, at the time of traveling or working, the operator can obtain a wide front view by the front window 21 (the window frame opening 12A of the front part 12) of the cab 11 which is formed wide.
[0047]
Further, when a deep hole is excavated by the working device 4, the front side of the working device 4 is not visible in a state where the operator sits on the driver's seat. To be stored. Thus, the operator can perform an accurate operation while looking at the working device 4 by raising his / her waist from the driver's seat and looking down through the window frame opening 12A.
[0048]
Here, according to the present embodiment, the upper front window 21 has a portion corresponding to the chamfered portion 19 of the cab 11 when the upper front window 21 is opened and stored on the top surface 16 side, that is, the glass A cutout 25 is provided at the upper left of the frame 22 and the window glass 23. Therefore, even when the width of the upper front window 21 is large, when the upper front window 21 is stored on the top surface 16 side of the cab 11, the upper front window 21 is chamfered by the notch 25 of the cab 11. Interference with the unit 19 can be avoided.
[0049]
As a result, the upper front window 21 can be formed with a large width together with the front portion 12 (window frame opening 12A) of the cab 11, so that a wide front view can be provided to the operator, and workability and safety can be provided. Can be improved.
[0050]
Further, the front surface 12 of the cab 11 is provided with a closing surface portion 12B for closing a portion corresponding to the cutout portion 25 when the upper front window 21 is closed, so that the upper front window 21 is closed and the front surface is closed. When arranged on the side of the portion 12, the portion corresponding to the notch 25 can be closed by the closing surface portion 12B. Thereby, the closing surface portion 12B can close the window frame opening 12A densely at the closing position of the upper front window 21, preventing rainwater, dust from entering the cab 11, outflow of conditioned air, and the like. Comfortability can be improved.
[0051]
On the other hand, the cab 11 is formed such that the width W1 of the front portion 12 is larger than the width W2 of the rear portion 13, so that the lower front window glass 20 and the upper front window 21 correspond to the front portion 12. The width of the glass 23 can be increased. As a result, it is possible to widen the field of view in front and improve workability and the like. Further, by reducing the width W2 of the rear surface portion 13, the rear side of the cab 11 can be accommodated within the turning radius R of the upper turning body 3.
[0052]
Further, the left side surface portion 14 of the cab 11 has a parallel surface portion 14A substantially parallel to the right side surface portion 15 at a portion closer to the front side from an intermediate portion in the front and rear directions of the cab 11, and the parallel surface portion 14A behind the door 17. The rear part is a chamfer 19. Accordingly, a large space can be secured in the cab 11 with a large width between the parallel surface portion 14A of the left side surface portion 14 and the right side surface portion 15, and workability and livability can be improved.
[0053]
In the embodiment, the cab 11 is formed into an approximately pentagonal box shape when viewed from above by a front portion 12, a rear portion 13, a left side portion 14, a right side portion 15, and a chamfered portion 19. I explained it. However, the present invention is not limited to this. For example, as in a modified example shown in FIG. 6, the cab 31 is divided into a front surface portion 32, a rear surface portion 33, a left side surface portion 34, a right side surface portion 35, a front side chamfered portion 36 and a rear side chamfered portion 36. The chamfered portion 37 may be formed in a box shape that is substantially hexagonal when viewed from above, and the upper side may be closed by a substantially hexagonal top surface portion 38.
[0054]
Also in this modification, the cab 31 is formed such that the width W3 of the front surface 32 is larger than the width W4 of the rear surface 33 (W3> W4).
[0055]
In the embodiment, the guide mechanism for guiding the upper front window 21 between the closed position and the open position is provided on the guide rail 18 provided on the cab 11 side and on the upper front window 21. The case in which the roller 24 moves along the roller 18 has been described as an example. However, the present invention is not limited to this. For example, using a link mechanism shown in Japanese Utility Model Laid-Open No. 5-1525, Japanese Utility Model Laid-Open No. 7-4557, and the like, the upper front window 21 is closed and closed. May be configured.
[0056]
Further, in the embodiments, the excavator 1 has been described as an example of a construction machine, but the present invention is not limited to this, and can be applied to other construction machines such as a hydraulic crane.
[0057]
【The invention's effect】
As described in detail above, according to the first aspect of the present invention, the box-shaped cab provided on the revolving structure has a chamfered portion at the rear position such that the outer rear position is within the turning radius of the revolving structure. The cab is provided with a front window slidably disposed between a front surface portion and a top surface portion, and the front window is opened and the chamfered portion of the cab when the front window is stored in the top surface side. A notch portion is provided in a portion corresponding to the notch, and a closing surface portion for closing a portion corresponding to the notch portion when the front window is closed is provided in a front portion of the cab.
[0058]
Therefore, when the front window having a large width is stored on the top surface side of the cab, the front window can be prevented from interfering with the chamfered portion by the notch. Thereby, a front window having a large width can be provided in the cab, a wide front view can be provided to the operator, and workability and safety can be improved.
[0059]
Further, when the front window is closed and disposed on the front side, the closing surface provided on the front side can close a portion corresponding to the cutout of the front window. As a result, the front part can be closed tightly by the front window, and it is possible to prevent infiltration of rainwater into the cab, outflow of conditioned air, and the like, thereby improving comfort.
[0060]
According to the invention of claim 2, the cab is provided with an openable / closable door at a front portion of the side portion located outside, and the chamfered portion is provided at a position rearward of the door, so that the side portion outside the cab is provided. According to the present invention, the rear portion of the door can be set within the turning radius of the turning body by the chamfered portion, and the turning performance can be improved.
[0061]
According to the third aspect of the present invention, the cab is formed such that the width of the front portion is larger than the width of the rear portion, so that the width of the front window can be increased in accordance with the front portion, Wide forward visibility can be provided to the operator. Further, by reducing the width of the rear surface portion, the rear side of the cab can be reliably accommodated within the turning radius of the upper turning body.
[0062]
According to the invention of claim 4, in the cab, the front side portion of the left side portion located on the outside is a parallel surface portion substantially parallel to the right side portion located on the inside, and the rear portion from the parallel surface portion of the left side portion is a chamfered portion. Has formed. Accordingly, a large space can be secured in the cab by increasing the width between the parallel surface portion on the left side surface portion and the right side surface portion, and workability and comfort can be improved. On the other hand, the rear part from the parallel plane part can be set within the turning radius by the chamfer part.
[Brief description of the drawings]
FIG. 1 is a front view showing a hydraulic shovel applied to an embodiment of the present invention.
FIG. 2 is an enlarged plan view of the hydraulic shovel shown in FIG. 1 in a state where a working device is omitted.
FIG. 3 is a left side view of FIG. 1 showing the hydraulic shovel in an enlarged manner with a working device omitted;
FIG. 4 is a transverse cross-sectional view of the cab as viewed from the direction of arrows IV-IV in FIG. 1 in a state where the front window is arranged at the fenestration position.
FIG. 5 is an external perspective view showing the front window alone.
FIG. 6 is a plan view showing a hydraulic excavator on which a cab according to a modification of the present invention is mounted.
[Explanation of symbols]
1 Hydraulic excavator (construction equipment)
2 Undercarriage (body)
3 Upper revolving structure 11, 31 Cab 12, 32 Front part 12A Window frame opening 12B Closed surface part 13, 33 Rear surface part 14, 34 Left side part 14A Parallel plane part 15, 35 Right side part 16, 38 Top side part 17 Door 19 Chamfered part 21 Upper side Front window 22 Glass frame 23 Window glass 25 Notch 37 Rear chamfer O Rotation center R Rotation radius W1, W3 Front width W2, W4 Rear width

Claims (4)

A vehicle body, a revolving body that is rotatably mounted on the vehicle body and has a shape such that at least a rear end side fits within the vehicle width of the vehicle body, and a box-shaped cab provided on the revolving body and having a driver's seat inside. In the equipped construction machine,
The cab is provided with a chamfer at the rear position so that the outer rear position is within the turning radius of the revolving body,
The cab is provided with a front window slidably arranged between a front part and a top part,
The front window is provided with a cutout in a portion corresponding to a chamfered portion of the cab when the front window is opened and stored on the top surface side,
A construction machine wherein a front surface of the cab is provided with a closing surface for closing a portion corresponding to the notch when the front window is closed. The construction machine according to claim 1, wherein the cab is provided with an openable / closable door at a front portion of a side portion located outside, and the chamfered portion is provided at a position rearward of the door. 3. The construction machine according to claim 1, wherein the cab has a configuration in which a width dimension of a front part is larger than a width dimension of a rear part. The cab is formed such that a portion closer to the front side of a left side portion located outside is a parallel surface portion substantially parallel to a right side portion located inside, and a rear portion from the parallel side portion of the left side portion is formed as the chamfered portion. , 2 or 3.

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