JP2004338544A - Construction machine driver protection device - Google Patents

Abstract

The present invention relates to a driver protection device, which is a device attached to a driver's cab of a construction machine, while minimizing an increase in the size of an external appearance and an increase in weight while securing a desired strength capable of protecting a driver. The present invention provides a construction machine driver protection device capable of suppressing a decrease in visibility as much as possible.
An operator protection device for a construction machine includes a top plate that covers an upper area of a driver's cab installed on a base, and left and right supports for supporting the top plate on the base. 40, one of the columns 30 is installed in the area of the cab 5 and the other of the columns 40 is installed in the rear area of the cab 5, and the left columns 30, 40 are asymmetrically left and right with respect to each other. Lay out.
[Selection] Fig. 6

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a driver protection device that is an auxiliary device of a cab of a construction machine.
[0002]
[Prior art]
In a construction machine such as a hydraulic shovel or a dump truck, a so-called ROPS (Roll Over Protective Structure: ROPS) that protects an operator (driver) by suppressing damage to an operation cab (cab) when the vehicle falls over or collides with a falling object. The performance of a fall protection structure and a FOPS (Falling Object Protective Structure) has been emphasized. For this reason, in recent construction machines, those equipped with a driver protection device attached to an operation cab have been used. (For example, see Patent Document 1).
[0003]
FIG. 11 shows a hydraulic excavator as an example of a construction machine equipped with a driver protection device. An operation cab C on which an operator O rides is installed on a main body frame (base) B of the hydraulic excavator A. At the same time, a driver protection device G is installed adjacent to the operation cab C.
[0004]
The driver protection device G includes a top plate T that covers an upper region of the operation cab C, and two columns of a right column R and a left column L that support the top plate T on the main body frame B. The right support R and the left support L support the right and left corners at the rear of the top plate T, respectively, and are installed symmetrically in the rear area of the operation cab C.
[0005]
[Patent Document 1]
JP-A-8-151665 [Problems to be Solved by the Invention]
Meanwhile, in the driver protection device G having the above-described configuration, when a lateral external force is applied from the side area of the operator O in the ROPS test as shown by an arrow F in the drawing, the load position of the external force, the right support R, and the left side Since the offset amount from the support L is large, a large load such as bending or twisting is applied to the right support R and the left support L.
[0006]
For this reason, the right support R and the left support L of the driver protection device G are configured to be large and thick in order to secure sufficient strength. In addition, there is a disadvantage that the hydraulic excavator A equipped with the driver protection device G is increased in size and weight.
[0007]
In order to solve the above-mentioned inconvenience, as shown in a hydraulic excavator A 'shown in FIG. 12, the center of the top plate T' in the driver protection device G 'is installed on the main body frame B' in the left and right side regions of the operation cab C '. A configuration in which the support is performed by the right support R ′ and the left support L ′ is considered.
[0008]
In the driver protection device G 'having the above configuration, the load position of the external force (arrow F in the drawing) in the ROPS test substantially matches the right support R' and the left support L ', and the right support R' and the left support L '. , The load applied to the driver protection device G 'can be reduced in size and weight.
[0009]
On the other hand, in the above-described driver protection device G ', since the right support R' and the left support L 'are located on both left and right sides of the operation cab C', the side view from the operator O who has boarded the operation cab C 'is remarkable. It will be blocked.
[0010]
Further, in the above-described driver protection device G ', since the right support R' and the left support L 'protrude to the left and right side regions of the operation cab C', the outer shape in the left and right direction is inadvertently enlarged, and the length is extended. In addition, the size of the hydraulic excavator A 'equipped with the driver protection device G' is also increased.
[0011]
SUMMARY OF THE INVENTION In view of the above circumstances, the object of the present invention is to minimize the increase in size and weight of the external appearance while securing the expected strength that can protect the driver, It is an object of the present invention to provide a construction machine driver protection device capable of minimizing deterioration.
[0012]
Means and effects for solving the problem
To achieve the above object, an operator protection device (10) for a construction machine according to claim 1 includes a top plate (20) that covers an upper area of an operator cab (5) installed on a base (4), Left and right supports (30, 40) for supporting the top plate (20) to the base (4), one of the supports (30) is provided in a side area of the cab (5), and the other is provided. The strut (40) is installed in the rear area of the driver's cab (5), and the left and right struts (30, 40) are laid out asymmetrically to each other.
According to the above configuration, since the left and right columns (30, 40) are laid out asymmetrically with respect to each other, the offset amount in the vehicle longitudinal direction from the load position of the external force in the ROPS test can be reduced, and the left and right columns (30, 40) can be reduced. ) Is reduced, so that the driver protection device (10) can be reduced in size and weight.
Further, according to the above configuration, by installing the other support (40) in the rear area of the operator's cab (5), it is possible to prevent the lateral view from being blocked by the support (40) as much as possible. Becomes possible.
[0013]
A driver for protecting a construction machine according to a second aspect of the present invention is the driver for a construction machine according to the first aspect of the present invention, wherein at least one of the two columns (30, 40) is provided. (40) is set within the range of the rear blind spot of the driver (O) riding in the cab (5).
According to the above configuration, since the support (40) is installed within the range of the rear blind spot of the driver (O), the support (40) does not obstruct the view when the driver checks the rear, so that It is possible to significantly improve the rear visibility of the driver.
[0014]
A construction machine driver protection device according to a third aspect of the present invention is the construction machine driver protection device (10) according to the first aspect of the present invention, wherein at least a driver's cab of the two columns (30, 40). One support (30) installed between (5) and the engine / hydraulic equipment (7) can be separated into a lower support (31) fixedly installed on the base (4) and a lower support (31). And an upper column (32) coupled to the upper column.
According to the above configuration, since the support (30) can be separated into the lower support (31) and the upper support (32), the operation of attaching / detaching the driver protection device (10) to / from the base (4) is extremely reduced. It can be easily implemented.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing examples.
1 to 10 show an embodiment in which the present invention is applied to a crawler carrier which is an embodiment of a construction machine. The crawler carrier (construction machine) 1 is a lower traveling body having a crawler type traveling mechanism. 2 and a vehicle body 3 mounted and supported on the lower traveling body 2.
[0016]
On the vehicle body 3 of the crawler carrier 1, an operation cab (operating cab) 5 is provided on the front left side of the body frame (base) 4, and a hood 6 is provided on the front right side of the body frame 4 similarly, that is, on the right side of the operation cab 5. The bonnet 6 accommodates an engine / hydraulic device 7 (see FIG. 6) mounted on the main body frame 4.
[0017]
In the rear half of the main body frame 4, that is, in the rear area between the operation cab 5 and the bonnet 6 (engine / hydraulic device 7), a loading vessel 8 is installed so as to be able to dump.
[0018]
Further, a driver protection device 10 is installed near the driver's cab 5 on the front left side of the main body frame 4. The driver protection device 10 includes a top plate 20 that covers an upper area of the operation cab 5. A right support (support) 30 and a left support (support) 40 for supporting the top plate 20 on the main body frame 4 are provided.
[0019]
As shown in FIG. 9, the top plate 20 of the driver protection device 10 includes left and right frames 20L and 20R extending forward and backward as strength members, front and rear beams 20A and 20B extending left and right, and extends forward from the beam 20A. And a plurality of ribs 20C.
[0020]
Further, the right support 30 of the driver protection device 10 is fixed to a position near the matching portion between the right frame 20R and the rear beam 20B of the top plate 20, and extends substantially vertically downward from the top plate 20. are doing.
[0021]
Here, the right support 30 is formed by connecting a bracket (lower support) 31 and an upper support 32 to each other. The bracket 31 has an installation flange 31A at a lower end and a connection flange 31B at an upper end. And is fixedly installed at a predetermined position on the main body frame 4 so as to stand substantially vertically.
[0022]
On the other hand, the upper support column 32 is fixed to the top plate 20 via the beam 20B and extends downward, and a lower end thereof is provided with a connecting flange 32A, and the flange 32A and the flange 31B of the bracket 31 are provided. Are fastened with bolts and nuts, so that the bracket 31 and the upper column 32 are separable from each other.
[0023]
In addition, the left support 40 of the driver protection device 10 is fixed to the rear end of the left frame 20L of the top 20 and extends slightly downward and downward from the top 20. An installation flange 40A is provided at the lower end.
[0024]
Here, as is apparent from FIG. 6, the right support 30 in the driver protection device 10 is installed on the right side area with respect to the oper cab 5, that is, between the oper cab 5 and the hood 6 (engine / hydraulic device 7). The left support column 40 of the driver protection device 10 is provided on the left rear area with respect to the operation cab 5, that is, between the operation cab 5 and the vessel 8.
[0025]
In this manner, the right support 30 installed in the right side area with respect to the operation cab 5 and the left support 40 installed in the left rear area with respect to the operation cab 5 are obviously laid out left and right asymmetrically.
[0026]
As is clear from FIG. 6, the left support 40 of the driver protection device 10 is positioned in the range of the blind spot behind the operator O riding on the operation cab 5, that is, the eye point of the operator O in the front area of the vessel 8. It is installed in an area D surrounded by a line La connecting the left corner of the vessel 8 and a line Lb connecting the eye point of the operator O and the right corner of the vessel 8.
[0027]
In the driver protection device 10 described above, the right support 30 and the left support 40 are laid out asymmetrically. Specifically, the right support 30 is installed in the right side area with respect to the oper cab 5, and the left support 40 is provided. Is installed in the rear area on the left side with respect to the operation cab 5, so that when a lateral external force is applied from the side area of the operator O in the ROPS test as shown by an arrow F in FIG. Since the amount of offset in the direction is small, the load applied to the right support 30 and the left support 40 is reduced, so that not only the driver protection device 10 can be reduced in size and weight, but also the driver The crawler carrier 1 equipped with the protection device 10 can be reduced in size and weight. In particular, in the crawler carrier 1 intended for operation on uneven terrain, it goes without saying that it is extremely effective to reduce the weight.
[0028]
In the driver protection device 10 described above, the inconvenience that the lateral view is blocked by the support columns 40 can be suppressed as much as possible by installing the left support columns 40 in the rear area on the left side with respect to the operation cab 5. It becomes.
[0029]
Further, in the above-described driver protection device 10, the left support 40 located on the outer side of the crawler carrier 1 is installed in the rear area on the left side with respect to the opercab 5, so that the left support 40 is Without protruding outward, it is possible to prevent the crawler carrier 1 equipped with the driver protection device 10 from being inadvertently enlarged.
[0030]
Further, in the driver protection device 10 described above, the left support 40 is installed in the range of the rear blind spot of the operator O on the operation cab 5, so that when the operator O checks the left rear of the crawler carrier 1, the left support is used. 40 does not hinder the field of view of the operator O, so that the rear visibility of the operator O can be significantly improved.
[0031]
In addition, in the crawler carrier 1 of the embodiment, when the driver protection device 10 is removed from the main body frame 4, the bolts and nuts that fasten the bracket 31 of the right support 30 and the upper support 32 are opened, and the main body frame is removed. The upper column 32 is separated from the bracket 31 fixedly installed on the main frame 4, the bolts and nuts fixing the left column 40 to the main frame 4 are opened, and the left column 40 is removed from the main frame 4. .
[0032]
On the other hand, when attaching the driver protection device 10 to the main body frame 4, the bracket 31 of the right support 30 and the upper support 32 are fastened to each other with bolts and nuts, and the flange 40A of the left support 40 is connected to the main body with bolts and nuts. What is necessary is just to fix to the frame 4.
[0033]
Here, in the above-described driver protection device 10, a bracket 31 in which the right support 30, that is, the right support 30 installed between the operation cab 5 and the bonnet 6 is fixed to the main body frame 4, When the driver protection device 10 is mounted / removed, the upper column 32 is detachably coupled to the right side column 30 located in the central region of the vehicle body. Therefore, the operation of attaching / detaching the driver protection device 10 to / from the main body frame 4 can be performed extremely easily.
[0034]
Further, since the right support 30 of the above-described driver protection device 10 is sandwiched between the operation cab 5 and the bonnet 6, the connecting portion between the bracket 31 and the upper support 32 is hidden from the outside and is difficult to see. The appearance is good without impairing the beauty of the carrier 1.
[0035]
In the embodiment described above, in the crawler carrier 1 in which the operation cab 5 is installed on the front left side of the vehicle body 3, the right support 30 of the driver protection device 10 is located on the side area of the operation cab 5, and the left support 40 is located behind the operation cab 5. For example, in the case of a crawler carrier in which an operation cab is installed on the front right side of the vehicle body, the right support of the driver protection device is in the rear area of the operation cab 5, and the left support is in the side area of the operation cab 5. Will be installed.
[0036]
That is, the installation mode related to the left and right columns in the driver protection device is not limited to the above-described embodiment, and any one that satisfies the condition of “laying the left and right columns asymmetrically left and right” may be used. Needless to say, it can be appropriately set in consideration of the arrangement of the operation cab and the like.
[0037]
In the above-described embodiment, only one of the right support 30 and the left support 40 constituting the driver protection device 10 is installed in the range of the rear blind spot of the operator O. Depending on the mode, the positional relationship between the opercab and the vessel, and further the conditions such as the size of the vessel 8, only the right support 30 is installed at the rear blind spot of the operator O, or both the right support 30 and the left support 40 are installed. It is also possible to install it at the blind spot behind the operator O.
[0038]
Further, in the above-described embodiment, in the crawler carrier 1 in which the hood 6 (engine / hydraulic device 7) is disposed on the right side of the operation cab 5, the operation / installation of the driver protection device 10 is facilitated. The right support 30 provided between the hood 5 and the hood 6 is composed of a bracket 31 and an upper support 32 which can be separated from each other. For example, a hood (engine / hydraulic device) is arranged on the left side of the operation cab 5. In the crawler carrier, the left support located between the operation cab and the bonnet is configured to be separable.
[0039]
In addition, for example, in a crawler carrier in which an engine / hydraulic device is arranged behind the operation cab, a support column installed behind the operation cab is configured to be separable in order to facilitate the work of attaching / detaching the driver protection device. It is effective to carry out, and depending on the layout of the vehicle main body in the crawler carrier, it is also possible to configure the two columns constituting the driver protection device to be separable from each other.
[0040]
Further, in the above-described embodiment, an example in which the present invention is applied to a crawler carrier which is an embodiment of a construction machine has been described. However, various construction machines other than the crawler carrier, for example, a wheel loader, a dump truck, a hydraulic shovel, or a bulldozer Needless to say, the present invention can be effectively applied to various construction machines provided with a driver protection device attached to a driver's cab.
[Brief description of the drawings]
FIGS. 1A and 1B are a left side overall view and a right side overall view showing a crawler carrier which is an embodiment of a construction machine provided with a driver protection device according to the present invention.
FIGS. 2 (a) and (b) are a main part plan view and an overall front view showing a crawler carrier which is an embodiment of a construction machine provided with a driver protection device according to the present invention.
FIG. 3 is an overall side view showing a base of the crawler carrier shown in FIGS. 1 and 2 and a driver protection device installed on the base.
FIG. 4 is an overall plan view showing a base of the crawler carrier shown in FIGS. 1 and 2 and a driver protection device installed on the base.
FIG. 5 is an overall front view showing a base of the crawler carrier shown in FIGS. 1 and 2 and a driver protection device installed on the base.
FIG. 6 is an essential part plan view conceptually showing an installation mode of a driver protection device in the crawler carrier shown in FIGS. 1 and 2;
FIG. 7 is an overall side view showing the driver protection device excluding a lower support.
FIG. 8 is an overall front view showing the driver protection device excluding a lower support.
FIG. 9 is an overall plan view showing the driver protection device excluding a lower support.
FIGS. 10 (a), (b) and (c) are a plan view, a front view and a side view showing a lower support of the driver protection device.
FIGS. 11A and 11B are conceptual diagrams showing an example of a driver protection device attached to a cab of a conventional construction machine.
FIG. 12 is a conceptual diagram showing another example of a driver protection device attached to a cab of a conventional construction machine.
[Explanation of symbols]
1. Crawler carrier (construction equipment)
2. Lower traveling body,
3 ... Vehicle body,
4: Body frame (base),
5… Ope cab (driver cab),
6 ... bonnet,
7. Engine / hydraulic equipment,
8 ... Vessel,
10 ... Driver protection device,
20 ... top plate,
30 ... right side support (support),
31 ... bracket (lower column),
32 ... upper strut,
40 ... left support (support)
O: Operator (driver).

Claims (3)

A top plate (20) for covering an upper area of the operator cab (5) installed on the base (4), and left and right columns (30, 40) for supporting the top plate (20) on the base (4). A construction machine driver protection device (10) comprising:
One support (30) is installed in the side area of the cab (5), and the other support (40) is installed in the rear area of the cab (5), and the left and right supports (30, 40) are installed. A construction machine driver protection device (10), which is laid out asymmetrically to each other. The at least one strut (40) of the two struts (30, 40) is installed within the range of the blind spot behind the driver (O) riding in the cab (5). The construction machine driver protection device (10) according to the above description. Of the two columns (30, 40), at least one column (30) installed between the cab (5) and the engine / hydraulic device (7) is fixed to the base (4) at the lower part. The device (10) according to claim 1, characterized in that it comprises a support (31) and an upper support (32) detachably connected to the lower support (31).

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