JP6988241B2 - Construction machinery - Google Patents

Description

The present invention relates to a construction machine including a detector such as a camera or a sensor that monitors the surroundings of the machine body.

As a detector (camera, etc.) mounting structure for construction machinery, a camera installation hole was provided in the counter weight body, a surveillance camera was installed behind the camera installation hole, and a camera protection member was provided in front of the surveillance camera. The ones have been proposed (see, for example, Patent Document 1).

In addition, as another detector mounting structure, a recess is provided in the counterweight installed at the rear of the vehicle body to install a surveillance camera, and a through hole is formed from the outer surface of the counterweight to the inside of the vehicle body to form a surveillance camera. It has been proposed to pass a cable connected to the above (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 2006-037606 Japanese Unexamined Patent Publication No. 2008-184789

However, in the structure of Patent Document 1, since the surveillance camera is installed behind the camera installation hole, it is difficult to install the camera and it is difficult to route the cable connected to the camera. There is room for improvement. Further, the structure of Patent Document 2 has a problem that noise from the engine room (machine room) easily leaks to the outside through a through port through which a cable is passed.

Therefore, an object of the present invention is to provide a construction machine provided with a detector mounting structure having advantages such as low noise leakage in the machine room and high sound insulation.

In order to achieve the above object, the present invention includes a machine room, a counterweight provided at the rear of the machine body, a through port for a detector for arranging a detector in the counterweight, and a counterweight in the counterweight. A wall projecting from the side surface toward the machine room side of the detector penetration port is provided, the wall extends from the lower side of the detector penetration port to the upper back side, and the wall is more than the detector penetration port. We provide construction machinery that is characterized by its large size.

Here, before Kikabe, the detector through holes back and formed continuously on both sides of the surrounded by continuously formed the wall space is formed as a detector insertion opening, wherein It is preferable that the detector is inserted and installed through the detector insertion opening.

Further, it is preferable that the wall and the mounting seat surface on which the detector is mounted are integrally cast with the counterweight, and the mounting seat surface is provided on the inner surface of the counterweight. ..

Further, the counterweight is provided with a side strut portion located behind the cab, an opening / closing cover for maintenance is provided behind the side strut portion of the counterweight, and the detector through port is provided. It is preferably formed on the side strut portion.

According to the construction machine according to claim 1, a wall is provided on the machine room side of the through-hole for the detector so that the machine room cannot be directly seen from the through-hole for the detector when viewed from the outside of the counterweight. Noise does not easily leak to the outside. That is, the sound insulation effect is high. In addition, since the detector installation part is protected by a robust counterweight, the possibility of detector damage is low even if an object collides.

According to the construction machine according to claim 2, since the wall is continuously formed on the back side of the through hole for the detector and on both sides thereof, the sound insulation effect is further enhanced. Further, since the wall extends upward from the lower side of the through-hole, it is difficult for rainwater or the like to enter the aircraft through the through-hole for the detector.

According to the construction machine according to claim 3, since the wall and the mounting seat surface on which the detector is mounted are integrally cast with the counterweight, the design can be performed simply and at low cost. Further, since the mounting seat surface is provided on the inner side surface (back side surface) of the counterweight, the detector is prevented from being stolen.

According to the construction machine according to claim 4, the open / close cover for maintenance can be opened to access the detector from the back side of the side support column portion. Further, since the detector is located at a relatively low height, it is easy to enter the detection range of the detector just below the end on the machine body side, and further, it is easy to perform assembly work including adjustment.

The left side view which shows the construction machine by embodiment of this invention. A perspective view of the counterweight according to the embodiment as viewed from the upper right front. FIG. 2 is an enlarged perspective view showing a portion to which a side camera is attached. The figure which looked at the side camera mounting structure by embodiment from the left side of the airframe. A vertical sectional view showing a side camera mounting structure according to an embodiment. FIG. 5 is a sectional view taken along line VI-VI of FIG.

The construction machine according to the embodiment of the present invention will be described with reference to FIGS. 1 to 6. Hereinafter, the hydraulic excavator 1 shown in FIG. 1 will be illustrated as an example of the construction machine according to the present invention. For convenience of explanation, the front-back direction and the up-down direction of the machine are defined as shown in FIG. Further, the direction orthogonal to the paper surface of FIG. 1 is defined as the left-right direction of the machine.

As shown in FIG. 1, the hydraulic excavator 1 includes a crawler type lower traveling body 2 and an upper turning body 3 (an example of an airframe). The upper rotating body 3 is mounted on the lower traveling body 2 and can rotate around the vertical axis with respect to the lower traveling body 2. The upper swing body 3 is provided with a work attachment 4, a cab 5, a work attachment 4, a counterweight 6 for balancing weight, and the like, which are composed of a boom, an arm, and a bucket.

The cab 5 (driver's cab) is provided on the left front portion of the upper swivel body 3. The counterweight 6 is provided at the rear of the upper swing body 3.

As shown in FIG. 2, the counterweight 6 of the present embodiment is formed in a substantially arc shape in a plan view, and is integrally formed of a casting or the like as a whole. The counterweight 6 includes a rear end portion 61 located at the lower part of the rear end, a left rear strut portion 62 extending vertically on the left side, a left rear strut portion 63 extending vertically on the left rear, and a left rear strut portion 62. It has an upper left portion 631 connecting the upper part of the left rear strut portion 63 and a lower left portion 632 connecting the lower part of the left rear strut portion 62 and the left rear strut portion 63, and the right side has the same schematic shape. Has.

Above the rear end portion 61 of the counterweight 6, a notch portion 64 in which the engine bonnet 71 is arranged is formed. That is, the inside of the counterweight 6 is a machine room in which an engine or the like is arranged. Further, an opening 65 is formed in a portion surrounded by the left side strut portion 62, the left rear strut portion 63, the upper left portion 631, and the left lower portion portion 632 (that is, behind the left side strut portion 62) for maintenance. The opening / closing cover 72 (FIG. 1) is attached. Needless to say, the shape of the counterweight is not limited to this.

A hinge (not shown) is provided at the rear end of the opening / closing cover 72 so that the front end can be opened by rotating around the rear end. The opening / closing cover 72 is provided with a lock device 73 with a key, and the key can be locked.

As shown in FIG. 1, the left side strut portion 62 is located immediately behind the cab 5. A camera through hole 66 for arranging a side camera 9 (an example of a detector, hereinafter simply referred to as “camera 9”) is formed in the left side support column portion 62.

Next, with reference to FIGS. 3 to 6, the configuration of the back side of the left side support column portion 62 to which the camera 9 is attached will be described in detail.

As shown in FIG. 3, a wall 67 is provided on the back side of the camera through hole 66. The wall 67 projects from the back surface 621 (inner surface of the counterweight 6) of the left side support column portion 62 toward the machine room side of the camera through hole 66. The wall 67 has a wall body 671 located directly behind the camera through hole 66, and a pair of side walls 672 located on both sides of the wall body 671 (front side and rear side in the front-rear direction of the machine). The pair of side walls 672 are continuously formed from the wall body 671 and connected to the back surface 621 of the left side support portion 62.

As shown in FIG. 5, the wall body 671 extends diagonally upward from the lower side of the camera through hole 66 (first portion 671A) and diagonally upward from the first portion 671A at a steeper angle (second portion). 671B).

The space surrounded by the wall body 671 and the pair of side walls 672 is a camera insertion opening 68 for inserting and installing the camera 9. As a result, the camera 9 is inserted into the camera through hole 66 from above the back side of the camera through port 66 through the camera insertion opening 68 and installed.

As shown in FIG. 4, when viewed from the side of the machine body, the wall 67 is larger than the through hole 66 for the camera. That is, when viewed from the side of the machine body, the camera through hole 66 is blocked by the wall 67. Further, as shown in FIG. 5, the upper end 675 of the wall 67 is located above the lower end 625 of the left side column portion 62 on the upper side of the camera through hole 66 by a height H. That is, the left side support column portion 62 on the upper side of the camera penetration port 66 and the wall 67 have an overlap. As described above, the wall 67 is formed so that the machine room (inside the counterweight 6) cannot be directly seen from the camera through hole 66 when viewed from the outside of the counterweight 6.

A mounting seat surface 69 for mounting the camera 9 (more specifically, the camera mounting member 94) is formed on the back surface 621 (that is, the inner surface of the counterweight 6) of the left side support column portion 62. The mounting seat surface 69 is formed with a bolt hole into which a bolt 943, which will be described later, is inserted. The wall 67 and the mounting seat surface 69 are integrally cast with the counterweight 6.

Next, the mounting structure of the camera 9 will be described. The camera 9 includes a housing 91, a lens 92, and a camera mounting member 94. As shown in FIG. 5, the lens 92 is exposed from the housing 91 and faces slightly downward on the left side of the machine body.

A camera component is housed in the housing 91, and a harness (not shown) is pulled out from the housing 91 and connected to a control device (not shown) from the camera insertion opening 68 through the inside of the machine body. ing. Note that FIGS. 5 and 6 show the imaging range R of the camera 9.

The camera mounting member 94 is fixed to the mounting seat surface 69. The camera mounting member 94 has a counterweight mounting portion 941 and a camera mounting portion 942. The counterweight mounting portion 941 is a portion mounted on the mounting seat surface 69 by the bolt 943.

As shown in FIGS. 4 to 6, the camera mounting portion 942 is a portion that is bent diagonally downward to the left from the counterweight mounting portion 941 and further bent downward by about 90 degrees so as to sandwich the camera 9. The housing 91 of the camera 9 is fixed to the camera mounting portion 942 with four screws.

In such a configuration, when the camera 9 is installed on the machine body, the opening / closing cover 72 is opened, a hand is inserted through the opening 65 (FIG. 2) of the counter weight 6, and the housing 91, the lens 92, and the camera mounting member 94 are previously inserted. The assembled component is inserted through the camera insertion opening 68 (that is, from above the back side of the camera through hole 66). Then, the camera 9 is installed by attaching the counterweight mounting portion 941 to the mounting seat surface 69 with the bolt 943.

According to the construction machine of the above-described embodiment, a wall 67 is provided on the machine room side of the camera through hole 66 so that the machine room cannot be directly seen from the camera through port 66 when viewed from the outside of the counter weight 6. , Noise in the machine room does not easily leak to the outside. That is, the sound insulation effect is high.

Further, when viewed from the outside of the counterweight 6 (in the present embodiment, the side of the machine body), the wall 67 is larger than the through hole 66 for the camera. More specifically, the left side support column portion 62 on the upper side of the camera through hole 66 and the wall 67 have an overlap. Therefore, the sound insulation effect is further improved.

Further, since the installation portion of the camera 9 is protected by the robust counterweight 6, the possibility of camera damage is low even if an object collides with the counterweight 6. Further, since the camera 9 is attached to the counterweight 6, the possibility that the camera attachment member 94 is deformed and the image is distorted is extremely low. Furthermore, it is not easily affected by work vibration.

Further, since the camera 9 is installed by forming the camera through hole 66 in the left side support column portion 62 of the counterweight 6, the camera 9 is positioned at a lower height than when the camera is installed on the upper part of the machine body. Can be made to. Therefore, the area directly below the end of the machine body is easily reflected in the camera image, and the assembly work including adjustment is easy to perform.

Further, since the mounting portion (mounting seat surface 69) of the camera 9 is provided on the inner side surface (back surface 621) of the counterweight 6, the camera 9 is prevented from being stolen. In particular, in the present embodiment, since the mounting portion of the camera 9 is inside the opening / closing cover 72 provided with the lock device 73 with a key, the anti-theft effect is high.

Further, since the wall 67 has the side wall 672, the sound insulation effect is further enhanced. Further, since the wall 67 (wall body 671) extends upward from the lower side of the camera through hole 66, it is difficult for rainwater or the like to enter the inside of the machine body from the camera through port 66. Further, since the first portion 671A of the wall 67 (wall main body 671) is inclined so as to be lowered toward the outside (left side), rainwater or the like does not collect.

Further, since the wall 67 and the mounting seat surface 69 on which the camera 9 is mounted are integrally cast with the counterweight 6, the design can be performed simply and at low cost.

The construction machine according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims.

The camera 9 described in the above embodiment is an example of a detector, and may be a distance sensor or the like that detects a distance to an object.

In the above-described embodiment, the example in which the camera through hole 66 is formed in the left side support column portion 62 has been described, but a similar through hole may be formed in another portion of the counterweight.

In the above-described embodiment, the wall 67 is configured to be larger than the camera through hole 66 when viewed from the side of the machine body, but the wall 67 may be the same size as the camera through hole 66 and may be the same size as the camera through hole 66. It suffices if the machine room is formed so as not to be directly seen from the mouth 66.

In the embodiment described above, the wall 67 has a side wall 672, but the side wall 672 may not be present.

In the above-described embodiment, the wall 67 extends upward from the lower side of the camera through-hole 66, and is configured to insert and install the camera 9 from the upper back side of the camera through-hole 66. Not limited to. For example, the wall may extend rearward from the front side of the camera through hole in the front-rear direction of the machine body, and the camera may be inserted and installed from the rear side. Alternatively, the wall may extend downward from the upper side of the through hole for the camera, and the camera may be inserted and installed from the lower side.

In the above-described embodiment, the wall 67 and the mounting seat surface 69 are integrally cast with the counterweight 6, but the present invention is not limited to this. For example, a wall may be attached to the counterweight 6 (left side strut portion 62) later.

1 hydraulic excavator, 2 lower traveling body, 3 upper swivel body,
4 work attachments, 5 cabs, 6 counterweights,
9 Side camera, 61 rear end, 62 left side strut part,
63 Left rear strut part, 64 Notch, 65 Opening,
66 camera through hole, 67 wall, 68 camera insertion opening, 69 mounting seat,
71 engine bonnet, 72 open / close cover, 73 lock device,
91 housing, 92 lenses, 94 camera mounting members,
621 back side, 625 bottom end, 671 wall body,
671A 1st part, 671B 2nd part, 672 side wall, 675 top edge,
941 counterweight mounting part, 942 camera mounting part,
943 bolts.

Claims (4)

Machine room and
Equipped with a counterweight installed at the rear of the aircraft
To the counterweight
A through hole for the detector for arranging the detector,
A wall protruding from the inner surface of the counterweight toward the machine room side of the detector through port is provided.
The wall extends from the lower side of the detector through hole to the upper side of the back side.
A construction machine characterized in that the wall is larger than the detector through hole. The wall is continuously formed on the back side of the through hole for the detector and on both sides thereof, and the space surrounded by the continuously formed walls is formed as a detector insertion opening.
The construction machine according to claim 1, wherein the detector is inserted and installed through the detector insertion opening. The wall and the mounting seat surface on which the detector is mounted are integrally cast with the counterweight.
The construction machine according to claim 1 or 2, wherein the mounting seat surface is provided on the inner side surface of the counterweight. The counterweight comprises a side strut portion located behind the cab.
An opening / closing cover for maintenance is provided behind the side strut portion of the counterweight.
The construction machine according to any one of claims 1 to 3, wherein the detector through port is formed in the side strut portion.

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