JP6004455B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine including a counterweight such as a hydraulic excavator or a hydraulic crane.

  In general, a construction machine such as a hydraulic excavator is configured such that a vehicle body is configured by a self-propelled lower traveling body and an upper revolving body that is turnably mounted on the lower traveling body, and is provided on the upper revolving body so as to be able to move up and down. The excavation work of the earth and sand is performed using the obtained working device. Here, the upper swing body has a swing frame as a base, and a working device is attached to the front side of the swing frame. On the other hand, on the rear side of the revolving frame, a counterweight for balancing the weight with the work device is provided.

  Some recent hydraulic excavators are provided with a rear camera device (rear camera device) in order to obtain a wide rear view. This rear camera device secures a field of view behind the vehicle body that becomes a blind spot for an operator in the cab during excavation work. For this purpose, the rear camera device is attached to a rear position on the upper surface of the counterweight ( Patent Document 1 and Patent Document 2).

JP 2008-231726 A JP 2011-42979 A

  By the way, in each patent document mentioned above, the situation behind a vehicle body can be projected on the monitor apparatus in a cab by attaching a rear camera apparatus to the upper surface of a counterweight. In this case, in order to project to a position close to the counterweight, that is, to a position near the rear of the vehicle body, the rear camera device needs to protrude greatly from the upper surface of the counterweight to the rear side.

  However, if the rear camera device is protruded greatly from the counterweight to the rear side, a gap is formed between the rear camera device and the counterweight, so that there is no sense of unity between the counterweight and the rear camera device. End up. In addition, when the rear camera device is protruded rearward from the counterweight, the bolt that secures the camera body provided on the rear camera device is exposed to the outside. Loosen this bolt and steal the camera body. There is a risk that.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to attach the rear camera device to the counterweight in a good-looking manner and to prevent the rear camera device from being stolen. It is to provide a construction machine that can do this.

A construction machine according to the present invention includes a self-propelled vehicle body, a working device provided on the front side of the vehicle body, a counterweight provided on the rear side of the vehicle body for balancing the weight of the working device, A rear camera device mounted on the upper surface of the counterweight in order to obtain a rear field of view.

In order to solve the above-mentioned problem, the feature of the configuration adopted by the invention of claim 1 is that the counterweight is a block body in which the boundary position between the rear surface and the upper surface is a convex curved surface curved in a convex arc shape. The rear camera device is disposed on the upper surface of the counterweight so as to protrude toward the convex curved surface of the counterweight, and the convex weight surface of the counterweight and the rear camera device A cover member that covers the gap formed by the convex curved surface is provided between the rear lower position, and the rear camera device is attached to the upper surface of the counterweight extending in the front and rear directions. A plate, a camera housing provided on the rear side of the mounting plate, and a camera body accommodated in the camera housing, wherein the cover member is formed of the mounting plate. In that a structure for attaching the lower side position.

  According to this configuration, the rear camera device is arranged in a state of protruding toward the convex curved surface of the counterweight. Therefore, the rear camera device can project the situation behind the vehicle body to a position near the rear portion of the vehicle body (the rear surface of the counterweight) without being blocked by the counterweight, and can provide a wide rear view to the operator.

  In addition, since a cover member is provided between the convex curved surface of the counterweight and the rear lower position of the rear camera device, the cover member faces the rear camera device toward the convex curved surface. By projecting, the gap formed between the convex curved surface of the counterweight and the rear lower position of the rear camera device can be covered.

  As a result, even when the rear camera device is largely projected toward the convex curved surface of the counterweight, the gap formed between the convex curved surface and the rear camera device can be covered with the cover member. Thereby, a counterweight and a rear camera apparatus can be arrange | positioned integrally, and the external appearance can be made favorable.

  In addition, the cover member can hide parts constituting the rear camera device, such as bolts fixing the internal camera body. Therefore, the cover member can prevent a situation in which the rear camera device is disassembled and parts are stolen.

Furthermore , since the cover member is configured to be attached to the rear lower position of the attachment plate serving as the base of the rear camera device, the cover member can be easily attached to the rear camera device using a fixing means such as welding. it can. In a state where the cover member is attached to the rear camera device, for example, a bolt that fixes the camera body to the attachment plate can be covered by the cover member, and a situation where the rear camera device is disassembled is prevented. Can do.

According to a second aspect of the invention, the upper surface of the counterweight is left, located in central rightward housing recess provided on the upper surface of the counterweight is attached to the top surface covers the housing recess A camera device mounting member is provided that includes a top plate and a concave bottom plate that is attached to the lower surface of the top plate and fits in the receiving recess. The lower surface of the top plate has a female screw hole at a position facing the concave bottom plate. A welding nut is provided. On the other hand, the mounting plate of the rear camera device is provided with a bolt insertion hole at a position corresponding to the welding nut, and the mounting plate is welded via the bolt insertion hole using a bolt. The configuration is to be attached to the nut.

  According to this configuration, when the camera device mounting member is provided on the upper surface of the counterweight, the top plate is attached to the upper surface of the counterweight in a state where the concave bottom plate is accommodated in the accommodating recess. Furthermore, the rear camera device can be mounted on the upper surface of the counterweight by mounting the rear camera device mounting plate on the top plate of the camera device mounting member using a bolt.

A third aspect of the present invention, the cover member is to have a configuration in which the edging member of resilient material so as to cover the lower edge facing the convex curved surface of the counterweight.

  According to this configuration, the cover member can be elastically adhered to the convex curved surface of the counterweight via the edging member. Thereby, the clearance gap between a cover member and a convex-shaped curved surface can be eliminated, crime prevention performance can be improved, and appearance can also be made favorable. Further, the edge member made of an elastic material can prevent the cover member from colliding with the counterweight to generate noise and damage the cover member and the counterweight, thereby extending their life.

The invention according to claim 4, wherein the cover member includes a plate portion after closing the gap between the counterweight and the rear end of the lower side position after the rear camera unit, the left rear plate portion, right across The left and right inclined plate portions extend forward along the convex curved surface of the counterweight and close the left and right gaps between the counterweight and the counterweight.

  According to this configuration, the gap formed between the convex curved surface of the counterweight and the rear lower position of the rear camera device can be covered with the rear plate portion on the rear side, and the left and right sides can be left. , It can be covered by the right inclined plate part.

The invention according to claim 5 is that the lower edge of the left and right inclined plate portions of the cover member is formed in a concave arc shape along the convex curved surface of the counterweight. Therefore, the lower edge of the cover member having a concave arc shape can be brought into close contact with the convex curved surface of the counterweight. Thereby, since the clearance gap between a cover member and a counterweight can be made small, crime prevention performance can be improved and appearance can also be made favorable.

1 is a left side view showing a hydraulic excavator according to an embodiment of the present invention. It is the perspective view of the principal part expansion which looked at the rear side of the hydraulic shovel from the diagonally left rear side. It is sectional drawing of the principal part expansion which shows a counterweight, an engine cover, a camera apparatus attachment member, a rear camera apparatus, a cover member, etc. It is the perspective view of the principal part expansion which looked at the rear camera apparatus and cover member attached on the counterweight from the lower side. It is the perspective view which looked at the counterweight, the camera apparatus attachment member, the rear camera apparatus, the cover member, etc. from the diagonally left front side. It is the disassembled perspective view which looked at the rear camera apparatus, the cover member, etc. from the diagonally left rear side. It is the perspective view which looked at the state which attached the cover member to the attachment board of a rear camera device from the diagonally upper left. It is the perspective view which looked at the state which attached the cover member to the attachment plate of the rear camera device from the diagonally lower left side. It is the disassembled perspective view which looked at the attachment plate, the cover member, and the edging member from the diagonally upper left side.

  Hereinafter, a construction machine according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 9 by taking as an example a case where the construction machine is applied to a crawler hydraulic excavator.

  In FIG. 1, reference numeral 1 denotes a hydraulic excavator as a typical example of a construction machine. The body of the hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2 and an upper revolving body 3 that is turnably mounted on the lower traveling body 2. A working device 4 for excavating earth and sand is provided on the front side of the upper swing body 3 so as to be able to move up and down.

  Here, the upper revolving structure 3 has a revolving frame 5 that forms a support structure, and a base end of the working device 4 is rotatably attached to the front side of the revolving frame 5. On the other hand, on the rear side of the revolving frame 5, a counterweight 9 to be described later is attached to balance the weight with the work device 4.

  Further, on the left front side of the revolving frame 5, a cab 6 on which an operator gets when operating the excavator 1 is disposed. A driver's seat, various operation levers, and a monitor device (all not shown) are disposed in the cab 6. A building cover 7 is provided on the front side of the counterweight 9, and mounted equipment (all not shown) including an engine, a hydraulic pump, and a heat exchange device are accommodated in the building cover 7. Here, as shown in FIG. 2, the building cover 7 includes left and right side plates 7A located on both the left and right sides of the revolving frame 5 and extending in the front and rear directions, and upper portions of the side plates 7A. It is comprised by the upper surface board 7B extended in the horizontal direction between. The rear side of the building cover 7 is closed by the front surface 9 </ b> A of the counterweight 9.

  The engine cover 8 is provided on the upper surface plate 7B of the building cover 7, and the engine cover 8 covers the mounted equipment housed in the building cover 7 from above. The engine cover 8 covers devices that require regular maintenance work among the mounted devices housed in the building cover 7, such as an engine and a heat exchanger that can be opened and closed from above. In this case, the engine cover 8 is attached to a cover support frame (not shown) constituting a part of the revolving frame 5 so as to be rotatable upward and downward.

  Here, as shown in FIG. 3, the engine cover 8 is configured so that its rear portion covers a front portion of a mounting plate 12 of the rear camera device 11 described later in a closed state. This prevents the mounting plate 12 from being removed or tilted to the left or right when the engine cover 8 is closed.

  Reference numeral 9 denotes a counterweight that balances the weight with the work device 4, and the counterweight 9 is disposed on the rear side of the revolving frame 5 constituting the upper revolving structure 3. The counterweight 9 is configured as a block body by filling a weight adjusting material in a casing forming an outer shell. As shown in FIGS. 1 and 2, the counterweight 9 has a rectangular front surface 9A extending left and right so as to face the engine, and both left and right directions are circular while extending left and right. A rear surface 9B that is curved in an arc and extends forward toward both ends of the front surface 9A, a D-shaped upper surface 9C surrounded by the front surface 9A and the rear surface 9B, and a lower surface that is placed on the revolving frame 5 9D.

  Here, as shown in FIG. 2, the boundary position between the rear surface 9B and the upper surface 9C of the counterweight 9 is formed in a convex arc shape so that the boundary position between the rear surface 9B and the upper surface 9C of the counterweight 9 is smoothly connected. A curved curved surface 9E is formed. That is, as shown in FIG. 3, when the uppermost position of the rear surface 9B of the counterweight 9 is the upper end portion 9B1 and the rearmost position of the upper surface 9C is the rear end portion 9C1, the convex curved surface 9E has the upper end portion 9B1. And the rear end portion 9C1. In FIG. 2, the upper end portion 9B1 of the rear surface 9B and the rear end portion 9C1 of the upper surface 9C are represented by solid lines, but between the rear surface 9B and the convex curved surface 9E and between the upper surface 9C and the convex curved surface. Between the surface 9E, it continues smoothly in an arc shape. As shown in FIG. 1, the boundary position between the rear surface 9B and the lower surface 9D is also a convex curved surface 9F curved in a convex arc shape. Thereby, the counterweight 9 has the upper and lower convex curved surfaces 9E and 9F, and the appearance of the outer shape is improved.

  On the other hand, as shown in FIG. 5, the counterweight 9 is formed with an accommodation recess 9G having a rectangular flat surface that is located in the center of the upper surface 9C in the left and right directions and extends in the front and rear directions. The upper and front sides of the housing recess 9G are open. Here, the housing recess 9G is for housing the concave bottom plate 10B of the camera device mounting member 10 when a camera device mounting member 10 described later is mounted on the upper surface 9C of the counterweight 9.

  The camera device mounting member 10 is provided on the counterweight 9, and a rear camera device 11 described later is mounted on the camera device mounting member 10. The camera device mounting member 10 is disposed at the center position in the left and right directions of the upper surface 9C so as to cover the accommodating recess 9G of the counterweight 9. As shown in FIGS. 3 and 5, the camera device mounting member 10 is a rectangular plate body that covers the receiving recess 9G of the counterweight 9 and is attached to the upper surface 9C, and the lower surface of the top plate 10A. And a concave bottom plate 10B formed to be recessed so as to be accommodated in the accommodating recess 9G. The top plate 10A constitutes a part of the upper surface 9C by being fixed to the upper surface 9C of the counterweight 9 using, for example, welding means.

  The top plate 10A of the camera apparatus mounting member 10 is provided with four through-holes 10C at positions facing the concave bottom plate 10B with intervals in the front, rear, left, and right directions. At the position of this through hole 10C, a welding nut 10D is provided on the lower surface of the top plate 10A. Therefore, female screw holes are formed in the top plate 10A by welding the welding nuts 10D to the lower surfaces of the four through holes 10C. Further, as shown in FIG. 3, the top plate 10A is formed with an engagement groove 10E extending in the forward and rearward positions toward the left front side of the concave bottom plate 10B.

  The engagement groove 10E is inserted with a hook member 13 constituting a mounting plate 12 of the rear camera device 11 described later, and extends linearly from the vicinity of the left side of the welding nut 10D at the left front position to the front end portion. Thereby, the engagement groove 10E restricts the movement of the mounting plate 12 to the rear side, and the rear camera device 11 can be detached only when the mounting plate 12 is moved to the front side.

  Next, the configuration of the rear camera device 11 according to the present embodiment provided on the rear side of the upper swing body 3 will be described.

  In other words, reference numeral 11 denotes a rear camera device mounted on the upper side of the counterweight 9. The rear camera device 11 provides the operator with a field of view behind the excavator 1 that is a blind spot of the operator in the cab 6. The rear camera device 11 includes a mounting plate 12, a camera housing 15, and a camera body 17 which will be described later.

  The mounting plate 12 is a mounting base of the rear camera device 11, and the mounting plate 12 is mounted facing the top plate 10 </ b> A of the camera device mounting member 10 that forms a part of the upper surface 9 </ b> C of the counterweight 9. As shown in FIGS. 7 to 9, the mounting plate 12 is formed as a substantially rectangular flat plate extending in the front and rear directions. The rear side of the mounting plate 12 extends toward the front side so as to expand in the left and right directions from the rear end edge 12A, and a narrow rear end edge 12A located at the center of the rear end of the mounting plate 12. Left and right inclined end edges 12B. Thus, the rear portion of the mounting plate 12 is formed in a trapezoidal shape by the left and right inclined end edges 12B and the rear end edge 12A.

  The mounting plate 12 is provided with four bolt insertion holes 12C at intervals in the front and rear directions and the left and right directions in a range from the front and rear intermediate portions to the front side. The four bolt insertion holes 12 </ b> C are used to insert bolts 14 to be described later for attaching the attachment plate 12 to the welding nut 10 </ b> D of the camera device attachment member 10. Three bolt insertion holes 12D are formed on the rear side of the mounting plate 12 (on the rear surface 9B side of the counterweight 9). Bolts 16 to be described later for attaching the camera housing 15 to the attachment plate 12 are inserted into the three bolt insertion holes 12D. On the other hand, the mounting plate 12 is provided with a harness insertion hole 12E for passing a harness (not shown) extending from the camera body 17 described later, located between each bolt insertion hole 12C and each bolt insertion hole 12D. It has been.

  Further, the mounting plate 12 has a rear lower surface 12F that is a rear lower position at a trapezoidal portion formed by the rear end edge 12A and each inclined end edge 12B. As shown in FIG. 3, a gap 18 described later is formed between the rear lower surface 12 </ b> F and the convex curved surface 9 </ b> E of the counterweight 9. On the other hand, a cover member 19 described later that covers the gap 18 is attached to the rear lower surface 12F.

  Here, the mounting plate 12 is provided with a hook member 13 that protrudes downward from the front side of the lower surface. That is, the hook member 13 is provided at a position corresponding to the engagement groove 10 </ b> E of the camera device mounting member 10. The hook member 13 is formed by bending the front end side of a rectangular plate body substantially at a right angle. The hook member 13 is secured to the lower surface of the mounting plate 12 by welding means so that the retaining portion 13A formed by bending the distal end side faces the left and right outer sides. As shown in FIG. 5, the hook member 13 is inserted into an engagement groove 10 </ b> E provided in the top plate 10 </ b> A of the camera device mounting member 10.

  A case where the mounting plate 12 configured as described above is mounted on the camera device mounting member 10 will be described. First, the mounting plate 12 is arranged on the top plate 10 </ b> A of the camera device mounting member 10 with its position shifted toward the front side. Next, while the hook member 13 is inserted into the engaging groove 10E of the top plate 10A from the front side, the mounting plate 12 is moved to the rear side (the rear surface 9B side of the counterweight 9), and four bolt insertion holes 12C are provided. Align to the welding nut 10D. In this state, the bolt 14 inserted into the bolt insertion hole 12 </ b> C is screwed into the female screw hole of the welding nut 10 </ b> D via the through hole 10 </ b> C of the camera device attachment member 10. Thereby, the attachment plate 12 can be attached to the camera apparatus attachment member 10.

  The camera housing 15 is provided on the rear side on the mounting plate 12, and the camera housing 15 is configured as a hollow case that houses a camera body 17 described later. As shown in FIG. 4, an opening 15 </ b> A is formed on the rear side of the camera housing 15 so as to be positioned at a narrow rear surface portion. The camera body 17 is exposed to the outside through the opening 15A. The camera housing 15 is attached to the attachment plate 12 by bolts 16 (shown in FIG. 6) that are inserted through the bolt insertion holes 12D of the attachment plate 12 from below.

  As shown in FIGS. 3 and 4, the camera body 17 is accommodated in a camera housing 15, and the camera body 17 is fixedly mounted in the camera housing 15, for example. The camera body 17 is constituted by a CCD camera, for example, and can photograph the outside through the opening 15A. A harness (not shown) of the camera body 17 is connected to the cab 6 via a harness insertion hole 12 </ b> E provided in the mounting plate 12. The camera body 17 captures a range behind the counterweight 9 that is a blind spot for an operator in the cab 6, and an image captured by the camera body 17 is a monitor device (not shown) disposed in the cab 6. ) Can be displayed. Thereby, the operator can monitor (confirm) the back of the counterweight 9 by the image displayed on the monitor device while operating the excavator 1 in the cab 6.

  Thus, the rear camera device 11 captures the range behind the counterweight 9. When the rear camera device 11 projects to a position close to the rear surface 9B of the counterweight 9, it avoids the convex curved surface 9E of the counterweight 9 that interferes when the lower side is projected, and is provided in the rear camera device 11. It is necessary to project the camera body 17 largely from the counterweight 9 to the rear side. That is, as shown in FIG. 3, the rear camera device 11 is arranged in a state of protruding toward the convex curved surface 9 </ b> E of the counterweight 9. Specifically, the mounting plate 12 is extended to the rear side so as to protrude to the upper side of the convex curved surface 9E, and the camera body 17 is located at the rear portion of the mounting plate 12 (upper surface of the rear lower surface 12F). Thus, the camera housing 15 is provided.

  Accordingly, since the rear camera device 11 is arranged so as to float in a cantilevered manner above the convex curved surface 9E, the convex curved surface 9E of the counterweight 9 and the rear portion of the mounting plate 12 of the rear camera device 11 are arranged. A gap 18 caused by the convex curved surface 9E is formed between the lower surface 12F. Specifically, as shown in FIG. 3, the gap 18 is an area inside a two-dot chain line connecting the rear end edge 12 </ b> A of the mounting plate 12 and the upper end portion 9 </ b> B <b> 1 of the rear surface 9 </ b> B of the counterweight 9. In this case, the gap 18 is opened in a substantially V shape on the rear surface 9B side of the counterweight 9 when viewed from the side.

  The gap 18 eliminates the sense of unity between the counterweight 9 and the rear camera device 11 and deteriorates the appearance. In addition, the bolt 16 fixing the camera housing 15 (camera body 17) to the mounting plate 12 is exposed to the outside. There is a risk of causing it. Therefore, the gap 18 is provided with a cover member 19 described later.

  Next, the structure and function of the cover member 19 which is a characteristic part of the present invention will be described in detail.

  Reference numeral 19 denotes a cover member provided between the convex curved surface 9E of the counterweight 9 and the rear lower surface 12F of the mounting plate 12 of the rear camera device 11. The cover member 19 covers the gap 18 formed between the mounting plate 12 and the convex curved surface 9E. As shown in FIGS. 6 to 9, the cover member 19 is formed so as to surround the rear end side of the mounting plate 12 by bending one plate at two locations in the length direction.

  That is, the cover member 19 extends leftward and rightward along the rear end edge 12A of the mounting plate 12, and is attached to the rear end edge 12A. And left and right inclined plate portions 19B extending toward the front side so as to expand in the left and right directions along the inclined edge 12B.

  Here, the cover member 19 is attached to the rear lower surface 12F of the attachment plate 12 using, for example, welding means. Specifically, in the cover member 19, the rear plate portion 19A is welded to the rear end edge 12A of the mounting plate 12, and the left and right inclined plate portions 19B are connected to the left and right inclined end edges 12B of the mounting plate 12, respectively. It is welded.

  On the other hand, the left and right inclined plate portions 19B of the cover member 19 are formed so that the upper and lower dimensions thereof increase toward the rear plate portion 19A so as to correspond to the convex curved surface 9E of the counterweight 9. Has been. That is, the left and right inclined plate portions 19B have a substantially triangular shape that is wide in the upward and downward directions at a position close to the rear plate portion 19A and narrow in the upward and downward directions at a position away from the rear plate portion 19A. Is formed. Accordingly, each of the inclined plate portions 19 </ b> B having a substantially triangular shape can match the substantially V-shaped gap 18, and the gap 18 can be reliably covered.

  In addition, the lower end edge of the inclined plate portion 19B facing the convex curved surface 9E is a concave arc-shaped edge 19B1 (hereinafter referred to as a concave edge 19B1) so as to correspond to the convex curved surface 9E. ing. Thereby, the concave edge 19B1 can be brought into close contact with the convex curved surface 9E of the counterweight 9, and the gap 18 between the cover member 19 and the counterweight 9 can be effectively covered. The lower end edge of the rear plate portion 19A is a linear end edge 19A1 extending linearly in the horizontal direction.

  The rimming member 20 is provided on the cover member 19, and the rimming member 20 is formed as a string-like body having a U-shaped cross section using a rubber material or a resin material having elasticity. The rim member 20 sandwiches the straight edge 19A1 of the rear plate portion 19A and the concave edge 19B1 of the left and right inclined plate portions 19B facing the convex curved surface 9E of the cover member 19 in a U shape. It is attached so that these may be covered.

  Here, when the edging member 20 abuts on the convex curved surface 9E of the counterweight 9, it can be elastically deformed in accordance with the surface shape of the convex curved surface 9E. Thereby, the edging member 20 can reliably fill the gap between the cover member 19 and the counterweight 9. In addition, since the edge member 20 made of an elastic material can elastically contact the cover member 19 with the counterweight 9, noise and damage due to a collision can be prevented.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration. Next, the operation of the hydraulic excavator 1 will be described.

  First, the operator gets on the cab 6 and sits on the driver's seat. By operating the traveling lever in this state, the lower traveling body 2 can be driven to move the hydraulic excavator 1 forward or backward. On the other hand, the operator can perform the excavation work of the earth and sand by operating the working device 4 and the like by operating the working lever.

  At the time of this excavation work, the rear camera device 11 attached to the counterweight 9 photographs the rear of the counterweight 9 that becomes a blind spot for the operator in the cab 6. An image photographed by the rear camera device 11 is displayed on a monitor device arranged in the cab 6. Thereby, the operator who operates the excavator 1 in the cab 6 can confirm the rear of the counterweight 9 by the image displayed on the monitor device, and can improve the safety during excavation work.

  Here, in the present embodiment, the rear camera device 11 is arranged in a state of protruding rearward toward the convex curved surface 9E of the counterweight 9. For this reason, it is possible to avoid the convex curved surface 9E of the counterweight 9 that becomes a hindrance when the rear camera device 11 projects the lower side, and the photographing range can be expanded downward to a position close to the counterweight 9. . Thereby, safety | security, such as excavation work, can be improved further.

  In this case, in a state where the rear camera device 11 is protruded greatly toward the rear side, a gap 18 is formed between the mounting plate 12 of the rear camera device 11 by the convex curved surface 9E of the counterweight 9. For this reason, the appearance of the rear camera device 11 is deteriorated, and the bolt 16 fixing the camera housing 15 to the mounting plate 12 may be exposed to the outside.

  However, according to the present embodiment, the rear camera device 11 is on the top plate 10A of the camera device mounting member 10 located on the upper surface 9C of the counterweight 9 and is directed toward the convex curved surface 9E of the counterweight 9. It is set as the structure arrange | positioned in the state protruded. Therefore, the rear camera device 11 can reflect the situation behind the vehicle body to a position near the rear of the vehicle body (the rear surface 9B of the counterweight 9) without being blocked by the convex curved surface 9E of the counterweight 9, and the cab 6 The operator can be provided with a wide rear view.

  Moreover, a cover member 19 is provided between the convex curved surface 9E of the counterweight 9 and the rear lower surface 12F of the mounting plate 12 of the rear camera device 11. Thereby, the cover member 19 can cover the gap 18 formed by causing the rear camera device 11 to protrude toward the convex curved surface 9E.

  As a result, even when the rear camera device 11 is protruded largely rearward toward the convex curved surface 9E of the counterweight 9, the convex curved surface 9E covers the gap 18 formed between the rear camera device 11 and the rear camera device 11. It can be covered with the member 19. Thereby, since the counterweight 9 and the rear camera apparatus 11 can be integrally arrange | positioned so that the clearance gap 18 between both may be eliminated, the appearance on appearance can be made favorable.

  Since the cover member 19 is configured to be attached to the rear lower surface 12F of the attachment plate 12 serving as the base of the rear camera device 11, the cover member 19 can be easily attached to the attachment plate 12 using welding means. Further, the cover member 19 provided on the rear lower surface 12F of the mounting plate 12 can cover each bolt 16 fixing the camera housing 15 to the mounting plate 12, so that the rear camera device 11 is disassembled and the parts are separated. It can prevent the situation of being stolen.

  On the upper surface 9C of the counterweight 9, an accommodation recess 9G is provided at the center in the left and right directions. On the other hand, the camera device attachment member 10 attached to the upper surface 9C of the counterweight 9 covers the accommodation recess 9G and is attached to the upper surface 9C, and is attached to the lower surface of the top plate 10A and fits in the accommodation recess 9G. It comprises the concave bottom plate 10B. On this, a welding nut 10D having a female screw hole is provided on the lower surface of the top plate 10A at a position facing the concave bottom plate 10B, while a mounting plate 12 of the rear camera device 11 is attached to the welding nut 10D. Bolt insertion holes 12C are provided at corresponding positions.

  Therefore, when the camera device mounting member 10 is attached to the upper surface 9C of the counterweight 9, the top plate 10A is mounted on the upper surface 9C of the counterweight 9 with the concave bottom plate 10B of the camera device mounting member 10 stored in the storage recess 9G. Install. Further, the mounting plate 12 of the rear camera device 11 is attached to the top plate 10 </ b> A of the camera device mounting member 10 using a bolt 14. Accordingly, the rear camera device 11 can be attached to the upper surface 9C of the counterweight 9 so as to be positioned at the center in the left and right directions.

  The cover member 19 is provided with an edge member 20 made of an elastic material across the linear edge 19A1 of the rear plate portion 19A and the concave edge 19B1 of the left and right inclined plate portions 19B facing the convex curved surface 9E. It is configured to cover each end edge 19A1, 19B1. As a result, the cover member 19 can be elastically brought into close contact with the convex curved surface 9 </ b> E via the edge member 20. As a result, the clearance between the cover member 19 and the counterweight 9 can be eliminated, the crime prevention performance can be improved, and the appearance can be improved. In addition, the edge member 20 made of an elastic material can prevent the cover member 19 from colliding with the counterweight 9 to generate noise and damage the cover member 19 and the counterweight 9. Can be extended.

  On the other hand, the cover member 19 includes a rear plate portion 19A for closing a gap between the rear end of the rear lower surface 12F of the mounting plate 12 constituting the rear camera device 11 and the counterweight 9, and a left side of the rear plate portion 19A. The left and right inclined plate portions 19B extend from the right ends to the front side along the convex curved surface 9E of the counterweight 9 and close the left and right gaps with the counterweight 9. As a result, the gap 18 formed between the convex curved surface 9E of the counterweight 9 and the rear lower surface 12F of the mounting plate 12 can be covered with the rear plate portion 19A on the rear side, and the left and right sides can be left. , And can be covered by the right inclined plate portion 19B.

  Further, the lower edge 19B1 of the left and right inclined plate portions 19B constituting the cover member 19 is formed in a concave arc shape along the convex curved surface 9E of the counterweight 9. Accordingly, the concave end edge 19B1 having a concave arc shape can be brought into close contact with the convex curved surface 9E, and the cover member 19 and the counterweight 9 can be effectively covered without a gap. As a result, the crime prevention performance by the cover member 19 can be improved and the appearance can be improved.

  In the embodiment, the case where the cover member 19 is provided separately from the mounting plate 12 of the rear camera device 11 and fixed to the mounting plate 12 using welding means has been described as an example. However, the present invention is not limited to this. For example, the mounting plate 12 and the cover member 19 may be integrally formed using a press molding machine. In addition, it is good also as a structure which forms the cover member 19 by providing a bending margin in the back side of the attachment board 12, and bending this bending margin.

  In the embodiment, the cover member 19 exemplifies a case where a single plate is formed into a trapezoidal shape by bending it at two locations in the length direction. However, the present invention is not limited to this. For example, the cover member 19 may have another shape such as a U shape or a V shape.

  On the other hand, in the embodiment, the engagement groove 10E is provided in the top plate 10A of the camera device mounting member 10 on the counterweight 9 side, the hook member 13 is provided in the mounting plate 12 of the rear camera device 11, and the engagement groove 10E is provided in the engagement groove 10E. The hook member 13 is engaged so as to have a function of preventing theft. However, the present invention is not limited to this. For example, the rear camera device 11 may be attached to the upper surface 9C of the counterweight 9 using a bolt without providing a theft prevention function. As another antitheft function, for example, the rear camera device 11 may be attached to the counterweight 9 using a bolt whose head has a special shape.

  Furthermore, in the embodiment, the crawler hydraulic excavator 1 is described as an example of the construction machine. However, the present invention is not limited to this, and any construction machine having a counterweight may be used. For example, the invention can be widely applied to other construction machines including a wheel-type hydraulic excavator, a hydraulic crane, and a wheel loader.

1 Excavator (construction machine)
2 Lower traveling body (car body)
3 Upper swing body (car body)
4 working device 9 counterweight 9B rear surface 9B1 upper end 9C upper surface 9C1 rear end 9E convex curved surface 10 camera device mounting member 10A top plate 10B concave bottom plate 10C through hole 10D welding nut 11 rear camera device 12 mounting plate 12A rear edge 12B Inclined edge 12C, 12D Bolt insertion hole 12F Rear lower surface (lower rear position)
DESCRIPTION OF SYMBOLS 15 Camera housing 17 Camera main body 18 Clearance 19 Cover member 19A Rear plate part 19A1 Straight edge 19B Inclined plate part 19B1 Concave edge 20 Edge member A Range of convex curved surface (boundary position of rear surface and upper surface of counterweight)

Claims (5)

And self-run capable body (2,3), the vehicle body and the working device provided on the front side of the (2,3) (4), the vehicle body to take a weight balance between the working device (4) (2 , 3) a counterweight (9) provided on the rear side, and a rear camera device (11) attached to the upper surface (9C) of the counterweight (9) to obtain a rear view. In construction machinery
The counterweight (9) is formed as a block body having a convex curved surface (9E) where the boundary position between the rear surface (9B) and the upper surface (9C) is curved in a convex arc shape,
The rear camera device (11) is arranged in a state of projecting toward the convex curved surface (9E) of the counterweight (9) on the upper surface (9C) of the counterweight (9),
A gap (9E) formed by the convex curved surface (9E) between the convex curved surface (9E) of the counterweight (9) and the rear lower position (12F) of the rear camera device (11). 18) is provided with a cover member (19) for covering,
The rear camera device (11) is provided on the rear side of the mounting plate (12), which extends in the front and rear directions and is attached to the upper surface (9C) of the counterweight (9). A camera housing (15) and a camera body (17) accommodated in the camera housing (15);
The construction machine according to claim 1, wherein the cover member (19) is attached to a rear lower position (12F) of the attachment plate (12) . The upper surface (9C) before SL counterweight (9), left, accommodation recess situated in the central portion of the right direction (9G) provided,
The upper surface (9C) of the counterweight (9) covers the accommodation recess (9G) and is attached to the upper surface (9C), and is attached to the lower surface of the top plate (10A). A camera device mounting member (10) including a concave bottom plate (10B) that fits in the housing recess (9G);
On the lower surface of the top plate (10A), a welding nut (10D) having a female screw hole at a position facing the concave bottom plate (10B) is provided.
On the other hand, the mounting plate (12) of the rear camera device (11) is provided with a bolt insertion hole (12C) at a position corresponding to the welding nut (10D).
The construction machine according to claim 1, wherein the mounting plate (12) is configured to be attached to the welding nut (10D) through the bolt insertion hole (12C) using a bolt (14). The cover member (19) has an edge member (20) made of an elastic material so as to cover the lower edges (19A1, 19B1) facing the convex curved surface (9E) of the counterweight (9). The construction machine according to claim 1 or 2 , wherein the construction machine is provided. The cover member (19) includes a rear plate (19A) that closes a gap between a rear end of the rear lower position (12F) of the rear camera device (11) and the counterweight (9), The left and right gaps between the counterweight (9) and the counterweight (9) extend forward from the left and right ends of the rear plate (19A) along the convex curved surface (9E) of the counterweight (9). The construction machine according to claim 1 , 2 or 3 , wherein the construction machine is formed by left and right inclined plate portions (19B). The lower edge (19B1) of the left and right inclined plate portions (19B) of the cover member (19) is formed in a concave arc shape along the convex curved surface (9E) of the counterweight (9). The construction machine according to claim 4 .

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