JP2022142587A - Construction machine - Google Patents

Abstract

To provide a construction machine allowing easy confirmation of the open/closed state of a door body from a cab seat, and allowing to avoid contact with a structure of the surrounding even when the door body is in an open state.SOLUTION: A storage box 11 for storing consumables such as grease, tools, an article such as a tooth is provided on the right side of a revolving frame 5. Further, an opening 12 for taking an article into and from the storage box 11, and a door body 13 for opening/closing the opening 12 are provided on an extended longitudinal board 5K of the revolving frame 5 as a left face board of a cab seat 6D forming the storage box 11.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a construction machine such as a hydraulic excavator having an upper revolving body rotatably provided on a lower running body, for example.

A hydraulic excavator, which is a representative example of construction machinery, includes a self-propelled undercarriage, an upper revolving body rotatably provided on the lower carriage, and a rotatable front portion of the upper revolving body. and a working device.

The upper revolving body has a revolving frame that serves as a base. A building consisting of a cab or a canopy is provided on the front left side of the revolving frame, and the building covers the operator's seat.

Consumables such as grease and articles such as tools and teeth are mounted on the hydraulic excavator. For this reason, the upper revolving body of the hydraulic excavator is provided with a storage box for storing articles such as consumables and tools. On the other hand, some hydraulic excavators are configured to be able to rotate even in a narrow site by forming an upper rotating body compactly. In the case of such a hydraulic excavator, it is difficult to secure a space for installing the storage box.

Therefore, some hydraulic excavators are provided with a storage box by utilizing the thickness dimension (height dimension) of the revolving frame located on the lower side of the building. In this case, the left side frame positioned on the lower side of the building is provided with an opening for taking articles in and out of the storage box and a door that can be opened and closed to cover the opening (Patent Document 1).

WO2016/068348

In the hydraulic excavator of Patent Document 1, articles can be taken in and out of the storage box through the opening by opening the door provided on the left side frame to the outside. However, if you forget to close the door located on the lower side of the building, it is difficult to visually check it from the driver's seat inside the building. In addition, since the open door protrudes leftward from the left side frame, it may come into contact with surrounding structures during work and be damaged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. To provide a construction machine capable of avoiding contact.

The present invention comprises a self-propelled lower traveling body, an upper revolving body rotatably provided on the lower traveling body, and a work device rotatably provided in front of the upper revolving body. In the construction machine, the upper revolving body comprises a revolving frame and a driver's seat provided on the left front side of the revolving frame, wherein a storage box for storing articles is provided on the right front side of the revolving frame. Among the side plates forming the storage box, the left side plate serving as the side plate on the side of the driver's seat is provided with an opening for taking articles in and out of the storage box and a door for opening and closing the opening. It is

According to the present invention, the opening/closing state of the door can be easily confirmed from the driver's seat, and contact with surrounding structures can be avoided even when the door is open.

1 is a perspective view showing a hydraulic excavator applied to an embodiment of the present invention; FIG. 1 is a cross-sectional view showing a hydraulic excavator with a working device in a traveling posture; FIG. 1 is a cross-sectional view showing a hydraulic excavator with a working device in a parked posture; FIG. It is a perspective view showing a turning frame, a storage box, a door, and the like. It is a top view which expands and shows the right front side of a revolving frame, and a storage box. FIG. 4 is a perspective view showing the front portion of the upper revolving body with the door closed. FIG. 4 is a perspective view showing the front portion of the upper revolving body with the door opened.

1 to 7, a hydraulic excavator will be described in detail below as a representative example of a construction machine according to an embodiment of the present invention.

In FIG. 1, a hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2, an upper revolving body 3 rotatably provided on the lower traveling body 2, and a front part of the upper revolving body 3. A work device 4 is provided to perform excavation work of earth and sand, and the like.

The working device 4 includes a boom 4A having a first end rotatably attached to a left vertical plate 5B and a right vertical plate 5C of a revolving frame 5, which will be described later, and a first end rotatable to a second end of the boom 4A. a rotatably mounted arm 4B, a bucket 4C rotatably mounted to the second end of arm 4B, and a cylinder bracket 5J of swing frame 5 between boom 4A and cylinder bracket 5J for actuating boom 4A. , an arm cylinder 4E for operating the arm 4B, and a bucket cylinder 4F for operating the bucket 4C. It should be noted that the work device 4 can be attached with other work implements such as a grapple and a breaker instead of the bucket 4C.

Here, the work device 4 can freely rotate the boom 4A, the arm 4B, and the bucket 4C during work. On the other hand, the working device 4 can take the running posture shown in FIG. 2 and the parking posture shown in FIG. In the working device 4 in the running posture of FIG. 2, the boom 4A is tilted forward and the arm 4B is brought closer to the boom 4A side so as to be separated from the ground. In the work device 4 in the parked posture of FIG. 3, the boom 4A is raised and the arm 4B is set vertically to press the bucket 4C against the ground.

The upper revolving body 3 includes a revolving frame 5, a cab 6, a storage box 11, an opening 12, and a door 13, which will be described later.

As shown in FIG. 4, the revolving frame 5 includes a flat plate-like bottom plate 5A, a left vertical plate 5B and a right vertical plate 5B, which are arranged near the center of the bottom plate 5A in the left-right direction, and which extend in the front-rear direction at predetermined intervals. The vertical plate 5C, the front plate 5D extending upward from the front part of the bottom plate 5A so as to connect between the left vertical plate 5B and the right vertical plate 5C, and the bottom plate 5A and the left vertical plate 5B extending leftward A left overhanging beam 5E, a right overhanging beam 5F extending to the right from the bottom plate 5A and the right vertical plate 5C, and a left side extending in the front-rear direction attached to the left end of the left overhanging beam 5E on the left side of the left vertical plate 5B. A frame 5G, a right side frame 5H attached to the right end of the right overhang beam 5F on the right side of the right vertical plate 5C and extending in the front-rear direction, and a rear side of the front ends of the left vertical plate 5B and the right vertical plate 5C. , a cylinder bracket 5J erected along the front surface of the front plate 5D from the front portion of the bottom plate 5A, an extension vertical plate 5K extending forward from the front portion of the right vertical plate 5C, and It has a front horizontal frame 5L that connects the front part of the right side frame 5H and the front part of the extension vertical plate 5K.

Here, the extended vertical plate 5K is formed as a rectangular plate elongated in the front-rear direction, and stands upright on the bottom plate 5A so as to be continuous with the left vertical plate 5B. Further, the vertical extension plate 5K is arranged on the front side of the cylinder bracket 5J and has an opening 12 which will be described later. The extended vertical plate 5K constitutes a left panel of the storage box 11, which will be described later. On the other hand, the front horizontal frame 5L constitutes the front plate of the storage box 11. As shown in FIG. Further, the tube of the boom cylinder 4D is rotatably attached to the cylinder bracket 5J.

As shown in FIG. 1 , the cab 6 is provided on the front left side of the revolving frame 5 . The cab 6 is arranged on the left side of the left vertical plate 5B, and is formed as a box body consisting of a front surface portion 6A, a rear surface portion (not shown), a left surface portion 6B, a right surface portion (not shown), and a top surface portion 6C. . The cab 6 has windows on the front surface 6A, the rear surface, the left surface 6B, the right surface, and the top surface 6C. Inside the cab 6, there is a floor plate on the lower side, and a driver's seat 6D on which an operator sits is provided on the floor plate. Further, an operation lever/pedal device for traveling is arranged in front of the driver's seat 6D, and an operation lever device for work (neither is shown) is arranged on both left and right sides of the driver's seat 6D.

As shown in FIGS. 2 and 3 , the counterweight 7 is provided at the rear portion of the revolving frame 5 in order to balance the weight with the working device 4 . An engine (not shown) is provided between the cab 6 and the front side of the counterweight 7 .

The hydraulic oil tank 8 is provided on the revolving frame 5 on the front side of the engine and on the right side of the right vertical plate 5C. The hydraulic oil tank 8 stores hydraulic oil to be supplied to a hydraulic pump (not shown) driven by the engine. Further, as shown in FIG. 1 , the fuel tank 9 is provided on the revolving frame 5 side by side on the right side of the hydraulic oil tank 8 . A fuel tank 9 stores fuel to be supplied to the engine.

The exterior cover 10 is provided on the right front side of the revolving frame 5 on the front side of the hydraulic oil tank 8 and the fuel tank 9 . The exterior cover 10 includes a left cover portion 10A extending in the front-rear direction along the right vertical plate 5C at a position close to the right side of the right vertical plate 5C, and a right cover portion 10A extending upward from the right side frame 5H. a front cover portion 10C extending upward from the front lateral frame 5L; .

The left cover portion 10A extends upward from the extended vertical plate 5K of the revolving frame 5 so as to be flush with the extended vertical plate 5K. The right cover part 10B is provided, for example, so that it can be opened and closed in the horizontal direction. A control valve device (not shown) and the like are accommodated in the exterior cover 10 .

Next, the structures of the housing box 11, the opening 12, and the door 13, which are characteristic parts of this embodiment, will be described.

The storage box 11 is provided on the front right side of the revolving frame 5 . The storage box 11 is formed as a container for storing consumables such as grease, tools, teeth and other articles. As shown in FIG. 5, the storage box 11 includes a front horizontal frame 5L as a front plate, a rear plate 11A located on the right side of the front plate 5D and extending in the left-right direction, and a left plate (side plate). ) as a front part of the right vertical plate 5C and the extended vertical plate 5K, a right side plate 11B as a side plate standing upright on the right side of the extended vertical plate 5K and extending in the front-rear direction with a gap, and a bottom plate closing the lower side. 5A form a bottomed box elongated in the front-rear direction. The storage box 11 is, for example, formed to have the same height dimension as the front horizontal frame 5L and the extension vertical plate 5K. The upper side of the storage box 11 can also be closed with a plate.

As shown in FIG. 7, the opening 12 is provided in the left side plate on the side of the driver's seat 6D forming the storage box 11, that is, in the extended vertical plate 5K. The opening 12 is formed as an opening for taking articles in and out of the storage box 11 . The opening 12 is arranged on the front side of the cylinder bracket 5J by being provided in the extension vertical plate 5K. The opening 12 has a rectangular shape with the maximum size that can be opened between the front horizontal frame 5L and the right vertical plate 5C. Thereby, articles can be easily taken in and out of the storage box 11 through the wide opening 12 .

Here, the position of the opening 12 is the position where the operator in the cab 6 can see through the right window provided on the right panel of the cab 6 when he sits on the driver's seat 6D and looks to the right side. It's becoming Further, the position of the opening 12 is a position where it is not covered by the boom 4A and the boom cylinder 4D even when the working device 4 is in the traveling posture shown in FIG. 2 or in the parking posture shown in FIG. . In other words, the work of taking out an article from the storage box 11 is often performed other than when the working device 4 is used, that is, when the working device 4 is in a running posture or a parking posture. Since the opening 12 can be opened by pressing, maintenance and the like can be easily performed.

The door 13 is provided on the left side (outer side) of the left side plate forming the storage box 11, ie, the extended vertical plate 5K, in order to open and close the opening 12. As shown in FIG. The door 13 is formed as a rectangular plate having a dimension equal to or slightly larger than that of the opening 12 and extending in the front-rear direction. The rectangular door body 13 is attached to the extension vertical plate 5K via a hinge 13A so as to be horizontally rotatable with its rear end serving as a fulcrum of rotation. The hinge 13A is arranged on the front side of the cylinder bracket 5J. As a result, the door body 13 has a maximum opening degree (door opening angle) greater than 90 degrees at a fully open position where the door body 13 contacts the cylinder bracket 5J.

On the front side of the door 13 (opposite to the hinge 13A), for example, a lock portion 13B with a locking function is provided. As a result, by locking the lock portion 13B using an engine key (not shown) or the like while the door 13 is closed, it is possible to prevent accidental opening and theft of articles. can be done.

Further, a hole 13C is formed near the front side of the door 13. As shown in FIG. This hole portion 13C is for putting a fingertip when opening the door 13, and has the function of a handle. Moreover, since the hole 13C does not protrude from the door 13 like a handle, it is less likely to be damaged and the opening of the door 13 can be guaranteed.

Here, the left surface of the extended vertical plate 5K of the revolving frame 5 provided with the door 13 is arranged near the center of the revolving frame 5 in the left-right direction. Further, the vertical extension plate 5K is arranged at a position recessed rearward (toward the cylinder bracket 5J) from the front horizontal frame 5L. In addition, the rear end of the door 13 is used as a rotation fulcrum (a fulcrum for opening and closing). Therefore, even when the door 13 is opened, the door 13 is configured so as not to protrude outward from the revolving frame 5 . Further, since the door 13 of the extension vertical plate 5K faces the right side plate of the cab 6, the operator sitting in the driver's seat 6D in the cab 6 can see through the right window of the right side plate simply by turning to the right. It is in a position where it can be visually recognized.

Further, the door 13 can open the opening 12 forward by providing a hinge 13A at the rear end. Thereby, the operator can easily reach the opening 12 from the front side of the upper revolving body 3 .

The hydraulic excavator 1 according to this embodiment has the configuration as described above, and the operation thereof will be described next.

The operator gets on the cab 6 and sits on the driver's seat 6D. At this time, the operator can confirm whether or not the door 13 of the storage box 11 is open by viewing the right side through the right window provided on the right panel of the cab 6.例文帳に追加After confirming that the door 13 of the housing box 11 is closed, the operator can start the engine and operate the operating lever/pedal device for traveling to cause the lower traveling body 2 to travel. By operating the left and right work operation lever devices, the operator can swing the upper swing body 3 and perform earth and sand excavation work with the work device 4 .

Next, an example of the operation of putting consumables such as grease, tools, teeth, etc. into and out of the storage box 11 will be described.

First, the operator stands on the front side of the upper revolving body 3 and inserts the engine key into the lock portion 13B of the door 13 to unlock it. After unlocking the lock portion 13B, the door body 13 is opened by putting a fingertip on the hole portion 13C. At this time, the door 13 is arranged at the foremost part of the revolving frame 5 and the lock part 13B is arranged on the front side of the door 13, so that the operator can easily open the door from the front side of the upper revolving body 3. Body 13 can be opened.

When the door 13 is opened, the articles in the storage box 11 can be taken out from the opening 12, and grease supply work, repair work, retightening work, tooth replacement work, and the like can be performed. On the other hand, after various operations are completed, the articles are returned from the opening 12 into the storage box 11, and the operation described above is reversed, whereby the door 13 can be locked in the closed state.

Thus, according to this embodiment, on the right front side of the revolving frame 5, there is provided a storage box 11 for storing consumables such as grease, tools, teeth and other articles. On top of this, the extended vertical plate 5K of the revolving frame 5 as the left side plate on the side of the driver's seat 6D forming the storage box 11 has an opening 12 for taking articles in and out of the storage box 11 and opening and closing the opening 12. A door body 13 is provided.

Therefore, the extended vertical plate 5K facing the cab 6 in the left-right direction on the right front side of the revolving frame 5 can be viewed by the operator inside the cab 6 as a building. Moreover, the extended vertical plate 5K of the revolving frame 5 is arranged in the vicinity of the center of the revolving frame 5 in the left-right direction so as to be recessed rearward. As a result, the door 13 can be configured so as not to protrude outward from the revolving frame 5 even in the open state.

Thereby, the door 13 can be seen from inside the cab 6 . Further, the door 13 does not protrude outward from the revolving frame 5 even in the open state. As a result, the open/closed state of the door 13 can be easily confirmed from inside the cab 6 . Further, even when the door 13 is open, contact with surrounding structures can be avoided, and the durability and reliability of the door 13 can be improved.

The revolving frame 5 includes a bottom plate 5A, a left vertical plate 5B and a right vertical plate 5C standing on the bottom plate 5A with a gap in the horizontal direction, and a right side extending in the front-rear direction located on the right side of the right vertical plate 5C. It includes a frame 5H, an extension vertical plate 5K extending forward from the front portion of the right vertical plate 5C, and a front horizontal frame 5L connecting the front portion of the right side frame 5H and the front portion of the extension vertical plate 5K. A left side plate of the storage box 11 is formed by a right vertical plate 5C and an extended vertical plate 5K. The opening 12 and the door 13 are provided on the vertical extension plate 5K. As a result, the storage box 11 can be formed using a part of the revolving frame 5 .

The rear end of the door 13, which serves as a fulcrum of rotation, is attached to an extended vertical plate 5K as a left plate. Thus, when the door 13 is opened, the opening 12 can be opened forward. As a result, the operator can easily reach the opening 12 from the front side of the upper rotating body 3, and can easily perform maintenance including loading and unloading of articles.

Further, on the front side of the revolving frame 5, a cylinder bracket 5J is provided to which a boom cylinder 4D for operating the boom 4A of the working device 4 is attached. Further, the opening 12 is arranged on the front side of the cylinder bracket 5J. In addition, the door 13 is configured to be arranged at a position close to the cylinder bracket 5J at the largest opening degree. Therefore, the door 13 can be opened to a maximum opening degree greater than 90 degrees, and articles can be easily taken in and out through the opening 12 .

In the embodiment, the case where the rear end of the door 13 is attached to the extension vertical plate 5K as a rotation fulcrum is exemplified. However, the present invention is not limited to this, and a configuration in which the upper end portion, the lower end portion, or the front end portion of the door body is attached to the extended vertical plate as a rotation fulcrum may be adopted.

In the embodiment, the crawler hydraulic excavator 1 provided with the cab 6 has been described as an example of the construction machine. However, the present invention is not limited to this, and can be widely applied to other construction machines such as crawler-type hydraulic excavators equipped with canopies, wheel-type hydraulic excavators, hydraulic cranes, and wheel loaders.

1 Hydraulic excavator (construction machinery)
2 lower running body 3 upper rotating body 4 work device 4D boom cylinder (cylinder)
5 Revolving frame 5A Bottom plate 5B Left vertical plate 5C Right vertical plate 5H Right side frame 5J Cylinder bracket 5K Extended vertical plate (left plate)
5L front horizontal frame (front plate)
6 cab 6D driver's seat 11 storage box 12 opening 13 door 13A hinge

Claims (4)

a self-propelled undercarriage, an upper revolving body rotatably provided on the lower carriage, and a work device rotatably provided in front of the upper revolving body,
In a construction machine in which the upper revolving structure includes a revolving frame and a driver's seat provided on the front left side of the revolving frame,
A storage box for storing articles is provided on the front right side of the rotating frame,
Of the side plates forming the storage box, the left side plate serving as the side plate on the side of the driver's seat is provided with an opening for taking articles in and out of the storage box and a door for opening and closing the opening. A construction machine characterized by: In the construction machine according to claim 1,
The revolving frame includes a bottom plate, a left vertical plate and a right vertical plate erected on the bottom plate with an interval in the horizontal direction, a right side frame positioned on the right side of the right vertical plate and extending in the front-rear direction, an extended vertical plate extending forward from a front portion of the right vertical plate; and a front horizontal frame connecting a front portion of the right side frame and a front portion of the extended vertical plate,
The left plate of the storage box is formed by the right vertical plate and the extended vertical plate,
The construction machine, wherein the opening and the door body are provided on the vertical extension plate. In the construction machine according to claim 1,
The construction machine according to claim 1, wherein the door body is attached to the left plate at a rear end thereof serving as a rotation fulcrum. In the construction machine according to claim 1,
A cylinder bracket to which a cylinder for operating the working device is mounted is provided on the front side of the revolving frame,
The opening is arranged on the front side of the cylinder bracket,
The construction machine according to claim 1, wherein the door body is arranged at a position close to the cylinder bracket at a maximum opening degree.

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